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tracing: update to otelhttp roundtripper 

Signed-off-by: Tonis Tiigi <tonistiigi@gmail.com>
v0.9
Tonis Tiigi 2021-07-09 19:22:20 -07:00
parent 2a4577efab
commit 5a318dd017
53 changed files with 6320 additions and 102 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

8
go.mod
View File

@ -55,6 +55,8 @@ require (
github.com/urfave/cli v1.22.2
go.etcd.io/bbolt v1.3.5
go.opentelemetry.io/contrib/instrumentation/google.golang.org/grpc/otelgrpc v0.21.0
go.opentelemetry.io/contrib/instrumentation/net/http/httptrace/otelhttptrace v0.21.0
go.opentelemetry.io/contrib/instrumentation/net/http/otelhttp v0.21.0
go.opentelemetry.io/otel v1.0.0-RC1
go.opentelemetry.io/otel/exporters/jaeger v1.0.0-RC1
go.opentelemetry.io/otel/exporters/otlp/otlptrace v1.0.0-RC1
@ -73,3 +75,9 @@ require (
)
replace github.com/docker/docker => github.com/docker/docker v20.10.3-0.20210609100121-ef4d47340142+incompatible
replace go.opentelemetry.io/contrib/instrumentation/google.golang.org/grpc/otelgrpc => github.com/tonistiigi/opentelemetry-go-contrib/instrumentation/google.golang.org/grpc/otelgrpc v0.0.0-20210714055410-d010b05b4939
replace go.opentelemetry.io/contrib/instrumentation/net/http/otelhttp => github.com/tonistiigi/opentelemetry-go-contrib/instrumentation/net/http/otelhttp v0.0.0-20210714055410-d010b05b4939
replace go.opentelemetry.io/contrib/instrumentation/net/http/httptrace/otelhttptrace => github.com/tonistiigi/opentelemetry-go-contrib/instrumentation/net/http/httptrace/otelhttptrace v0.0.0-20210714055410-d010b05b4939

14
go.sum
View File

@ -419,6 +419,8 @@ github.com/evanphx/json-patch v4.2.0+incompatible/go.mod h1:50XU6AFN0ol/bzJsmQLi
github.com/evanphx/json-patch v4.9.0+incompatible/go.mod h1:50XU6AFN0ol/bzJsmQLiYLvXMP4fmwYFNcr97nuDLSk=
github.com/fatih/color v1.7.0/go.mod h1:Zm6kSWBoL9eyXnKyktHP6abPY2pDugNf5KwzbycvMj4=
github.com/fatih/color v1.9.0/go.mod h1:eQcE1qtQxscV5RaZvpXrrb8Drkc3/DdQ+uUYCNjL+zU=
github.com/felixge/httpsnoop v1.0.2 h1:+nS9g82KMXccJ/wp0zyRW9ZBHFETmMGtkk+2CTTrW4o=
github.com/felixge/httpsnoop v1.0.2/go.mod h1:m8KPJKqk1gH5J9DgRY2ASl2lWCfGKXixSwevea8zH2U=
github.com/flynn/go-shlex v0.0.0-20150515145356-3f9db97f8568/go.mod h1:xEzjJPgXI435gkrCt3MPfRiAkVrwSbHsst4LCFVfpJc=
github.com/form3tech-oss/jwt-go v3.2.2+incompatible/go.mod h1:pbq4aXjuKjdthFRnoDwaVPLA+WlJuPGy+QneDUgJi2k=
github.com/fortytw2/leaktest v1.2.0/go.mod h1:jDsjWgpAGjm2CA7WthBh/CdZYEPF31XHquHwclZch5g=
@ -1071,6 +1073,12 @@ github.com/tonistiigi/fsutil v0.0.0-20210609172227-d72af97c0eaf h1:L0ixhsTk9j+dV
github.com/tonistiigi/fsutil v0.0.0-20210609172227-d72af97c0eaf/go.mod h1:lJAxK//iyZ3yGbQswdrPTxugZIDM7sd4bEsD0x3XMHk=
github.com/tonistiigi/go-actions-cache v0.0.0-20210714033416-b93d7f1b2e70 h1:+ZlFs3Tl5qYZJvX2PxfZxGlVXz847LsOJGyNVU5pCHo=
github.com/tonistiigi/go-actions-cache v0.0.0-20210714033416-b93d7f1b2e70/go.mod h1:dNS+PPTqGnSl80x3wEyWWCHeON5xiBGtcM0uD6CgHNU=
github.com/tonistiigi/opentelemetry-go-contrib/instrumentation/google.golang.org/grpc/otelgrpc v0.0.0-20210714055410-d010b05b4939 h1:s6wDMZYNyWt8KvkjhrMpOthFPgI3JB8ipJS+eCV/psg=
github.com/tonistiigi/opentelemetry-go-contrib/instrumentation/google.golang.org/grpc/otelgrpc v0.0.0-20210714055410-d010b05b4939/go.mod h1:Vm5u/mtkj1OMhtao0v+BGo2LUoLCgHYXvRmj0jWITlE=
github.com/tonistiigi/opentelemetry-go-contrib/instrumentation/net/http/httptrace/otelhttptrace v0.0.0-20210714055410-d010b05b4939 h1:ZZ1KHKvs97BcRoblbm6RhrDzs/OejFv7miYSIcZI7Ds=
github.com/tonistiigi/opentelemetry-go-contrib/instrumentation/net/http/httptrace/otelhttptrace v0.0.0-20210714055410-d010b05b4939/go.mod h1:a9cocRplhIBkUAJmak+BPDx+LVL7cTmqUPB0uBcTA4k=
github.com/tonistiigi/opentelemetry-go-contrib/instrumentation/net/http/otelhttp v0.0.0-20210714055410-d010b05b4939 h1:iYUjYA5PwiJjvlY1PkCjFZIoDFOlL4g/AqSrcd5lJtE=
github.com/tonistiigi/opentelemetry-go-contrib/instrumentation/net/http/otelhttp v0.0.0-20210714055410-d010b05b4939/go.mod h1:JQAtechjxLEL81EjmbRwxBq/XEzGaHcsPuDHAx54hg4=
github.com/tonistiigi/units v0.0.0-20180711220420-6950e57a87ea h1:SXhTLE6pb6eld/v/cCndK0AMpt1wiVFb/YYmqB3/QG0=
github.com/tonistiigi/units v0.0.0-20180711220420-6950e57a87ea/go.mod h1:WPnis/6cRcDZSUvVmezrxJPkiO87ThFYsoUiMwWNDJk=
github.com/tonistiigi/vt100 v0.0.0-20210615222946-8066bb97264f h1:DLpt6B5oaaS8jyXHa9VA4rrZloBVPVXeCtrOsrFauxc=
@ -1139,8 +1147,6 @@ go.opencensus.io v0.22.3 h1:8sGtKOrtQqkN1bp2AtX+misvLIlOmsEsNd+9NIcPEm8=
go.opencensus.io v0.22.3/go.mod h1:yxeiOL68Rb0Xd1ddK5vPZ/oVn4vY4Ynel7k9FzqtOIw=
go.opentelemetry.io/contrib v0.21.0 h1:RMJ6GlUVzLYp/zmItxTTdAmr1gnpO/HHMFmvjAhvJQM=
go.opentelemetry.io/contrib v0.21.0/go.mod h1:EH4yDYeNoaTqn/8yCWQmfNB78VHfGX2Jt2bvnvzBlGM=
go.opentelemetry.io/contrib/instrumentation/google.golang.org/grpc/otelgrpc v0.21.0 h1:68WZYF6CrnsXIVDYc51cR9VmTX2IM7y0svo7s4lu5kQ=
go.opentelemetry.io/contrib/instrumentation/google.golang.org/grpc/otelgrpc v0.21.0/go.mod h1:Vm5u/mtkj1OMhtao0v+BGo2LUoLCgHYXvRmj0jWITlE=
go.opentelemetry.io/otel v1.0.0-RC1 h1:4CeoX93DNTWt8awGK9JmNXzF9j7TyOu9upscEdtcdXc=
go.opentelemetry.io/otel v1.0.0-RC1/go.mod h1:x9tRa9HK4hSSq7jf2TKbqFbtt58/TGk0f9XiEYISI1I=
go.opentelemetry.io/otel/exporters/jaeger v1.0.0-RC1 h1:tVhw2BMSAk248rhdeirOe9hlXKwGHDvVtF7P8F+H2DU=
@ -1151,6 +1157,10 @@ go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracegrpc v1.0.0-RC1 h1:ZO
go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracegrpc v1.0.0-RC1/go.mod h1:cDwRc2Jrh5Gku1peGK8p9rRuX/Uq2OtVmLicjlw2WYU=
go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracehttp v1.0.0-RC1 h1:zoRUmPIQOAhkiXjoZ/BJUd6A9Ug1M/sEJgrEI68m3dU=
go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracehttp v1.0.0-RC1/go.mod h1:OYKzEoxgXFvehW7X12WYT4/a2BlASJK9l7RtG4A91fg=
go.opentelemetry.io/otel/internal/metric v0.21.0 h1:gZlIBo5O51hZOOZz8vEcuRx/l5dnADadKfpT70AELoo=
go.opentelemetry.io/otel/internal/metric v0.21.0/go.mod h1:iOfAaY2YycsXfYD4kaRSbLx2LKmfpKObWBEv9QK5zFo=
go.opentelemetry.io/otel/metric v0.21.0 h1:ZtcJlHqVE4l8Su0WOLOd9fEPheJuYEiQ0wr9wv2p25I=
go.opentelemetry.io/otel/metric v0.21.0/go.mod h1:JWCt1bjivC4iCrz/aCrM1GSw+ZcvY44KCbaeeRhzHnc=
go.opentelemetry.io/otel/oteltest v1.0.0-RC1 h1:G685iP3XiskCwk/z0eIabL55XUl2gk0cljhGk9sB0Yk=
go.opentelemetry.io/otel/oteltest v1.0.0-RC1/go.mod h1:+eoIG0gdEOaPNftuy1YScLr1Gb4mL/9lpDkZ0JjMRq4=
go.opentelemetry.io/otel/sdk v1.0.0-RC1 h1:Sy2VLOOg24bipyC29PhuMXYNJrLsxkie8hyI7kUlG9Q=

82
util/tracing/tracing.go
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@ -3,10 +3,12 @@ package tracing
import (
"context"
"fmt"
"io"
"net/http"
"net/http/httptrace"
"github.com/moby/buildkit/util/bklog"
"go.opentelemetry.io/contrib/instrumentation/net/http/httptrace/otelhttptrace"
"go.opentelemetry.io/contrib/instrumentation/net/http/otelhttp"
"go.opentelemetry.io/otel/attribute"
"go.opentelemetry.io/otel/codes"
"go.opentelemetry.io/otel/propagation"
@ -55,81 +57,17 @@ func ContextWithSpanFromContext(ctx, ctx2 context.Context) context.Context {
return ctx
}
var DefaultTransport http.RoundTripper = &Transport{
RoundTripper: NewTransport(http.DefaultTransport),
}
var DefaultTransport http.RoundTripper = NewTransport(http.DefaultTransport)
var DefaultClient = &http.Client{
Transport: DefaultTransport,
}
var propagators = propagation.NewCompositeTextMapPropagator(propagation.TraceContext{}, propagation.Baggage{})
type Transport struct {
http.RoundTripper
}
func NewTransport(rt http.RoundTripper) http.RoundTripper {
// TODO: switch to otelhttp. needs upstream updates to avoid transport-global tracer
return &Transport{
RoundTripper: rt,
}
}
func (t *Transport) RoundTrip(req *http.Request) (*http.Response, error) {
span := trace.SpanFromContext(req.Context())
if !span.SpanContext().IsValid() { // no tracer connected with either request or transport
return t.RoundTripper.RoundTrip(req)
}
ctx, span := span.TracerProvider().Tracer("").Start(req.Context(), req.Method)
req = req.WithContext(ctx)
span.SetAttributes(semconv.HTTPClientAttributesFromHTTPRequest(req)...)
propagators.Inject(ctx, propagation.HeaderCarrier(req.Header))
resp, err := t.RoundTripper.RoundTrip(req)
if err != nil {
span.RecordError(err)
span.End()
return resp, err
}
span.SetAttributes(semconv.HTTPAttributesFromHTTPStatusCode(resp.StatusCode)...)
span.SetStatus(semconv.SpanStatusFromHTTPStatusCode(resp.StatusCode))
if req.Method == "HEAD" {
span.End()
} else {
resp.Body = &wrappedBody{ctx: ctx, span: span, body: resp.Body}
}
return resp, err
}
type wrappedBody struct {
ctx context.Context
span trace.Span
body io.ReadCloser
}
var _ io.ReadCloser = &wrappedBody{}
func (wb *wrappedBody) Read(b []byte) (int, error) {
n, err := wb.body.Read(b)
switch err {
case nil:
// nothing to do here but fall through to the return
case io.EOF:
wb.span.End()
default:
wb.span.RecordError(err)
}
return n, err
}
func (wb *wrappedBody) Close() error {
wb.span.End()
return wb.body.Close()
return otelhttp.NewTransport(rt,
otelhttp.WithPropagators(propagation.NewCompositeTextMapPropagator(propagation.TraceContext{}, propagation.Baggage{})),
otelhttp.WithClientTrace(func(ctx context.Context) *httptrace.ClientTrace {
return otelhttptrace.NewClientTrace(ctx, otelhttptrace.WithoutSubSpans())
}),
)
}

0
vendor/github.com/felixge/httpsnoop/.gitignore generated vendored Normal file
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6
vendor/github.com/felixge/httpsnoop/.travis.yml generated vendored Normal file
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@ -0,0 +1,6 @@
language: go
go:
- 1.6
- 1.7
- 1.8

19
vendor/github.com/felixge/httpsnoop/LICENSE.txt generated vendored Normal file
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@ -0,0 +1,19 @@
Copyright (c) 2016 Felix Geisendörfer (felix@debuggable.com)
Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in
all copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
THE SOFTWARE.

10
vendor/github.com/felixge/httpsnoop/Makefile generated vendored Normal file
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@ -0,0 +1,10 @@
.PHONY: ci generate clean
ci: clean generate
go test -v ./...
generate:
go generate .
clean:
rm -rf *_generated*.go

95
vendor/github.com/felixge/httpsnoop/README.md generated vendored Normal file
View File

@ -0,0 +1,95 @@
# httpsnoop
Package httpsnoop provides an easy way to capture http related metrics (i.e.
response time, bytes written, and http status code) from your application's
http.Handlers.
Doing this requires non-trivial wrapping of the http.ResponseWriter interface,
which is also exposed for users interested in a more low-level API.
[![GoDoc](https://godoc.org/github.com/felixge/httpsnoop?status.svg)](https://godoc.org/github.com/felixge/httpsnoop)
[![Build Status](https://travis-ci.org/felixge/httpsnoop.svg?branch=master)](https://travis-ci.org/felixge/httpsnoop)
## Usage Example
```go
// myH is your app's http handler, perhaps a http.ServeMux or similar.
var myH http.Handler
// wrappedH wraps myH in order to log every request.
wrappedH := http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
m := httpsnoop.CaptureMetrics(myH, w, r)
log.Printf(
"%s %s (code=%d dt=%s written=%d)",
r.Method,
r.URL,
m.Code,
m.Duration,
m.Written,
)
})
http.ListenAndServe(":8080", wrappedH)
```
## Why this package exists
Instrumenting an application's http.Handler is surprisingly difficult.
However if you google for e.g. "capture ResponseWriter status code" you'll find
lots of advise and code examples that suggest it to be a fairly trivial
undertaking. Unfortunately everything I've seen so far has a high chance of
breaking your application.
The main problem is that a `http.ResponseWriter` often implements additional
interfaces such as `http.Flusher`, `http.CloseNotifier`, `http.Hijacker`, `http.Pusher`, and
`io.ReaderFrom`. So the naive approach of just wrapping `http.ResponseWriter`
in your own struct that also implements the `http.ResponseWriter` interface
will hide the additional interfaces mentioned above. This has a high change of
introducing subtle bugs into any non-trivial application.
Another approach I've seen people take is to return a struct that implements
all of the interfaces above. However, that's also problematic, because it's
difficult to fake some of these interfaces behaviors when the underlying
`http.ResponseWriter` doesn't have an implementation. It's also dangerous,
because an application may choose to operate differently, merely because it
detects the presence of these additional interfaces.
This package solves this problem by checking which additional interfaces a
`http.ResponseWriter` implements, returning a wrapped version implementing the
exact same set of interfaces.
Additionally this package properly handles edge cases such as `WriteHeader` not
being called, or called more than once, as well as concurrent calls to
`http.ResponseWriter` methods, and even calls happening after the wrapped
`ServeHTTP` has already returned.
Unfortunately this package is not perfect either. It's possible that it is
still missing some interfaces provided by the go core (let me know if you find
one), and it won't work for applications adding their own interfaces into the
mix. You can however use `httpsnoop.Unwrap(w)` to access the underlying
`http.ResponseWriter` and type-assert the result to its other interfaces.
However, hopefully the explanation above has sufficiently scared you of rolling
your own solution to this problem. httpsnoop may still break your application,
but at least it tries to avoid it as much as possible.
Anyway, the real problem here is that smuggling additional interfaces inside
`http.ResponseWriter` is a problematic design choice, but it probably goes as
deep as the Go language specification itself. But that's okay, I still prefer
Go over the alternatives ;).
## Performance
```
BenchmarkBaseline-8 20000 94912 ns/op
BenchmarkCaptureMetrics-8 20000 95461 ns/op
```
As you can see, using `CaptureMetrics` on a vanilla http.Handler introduces an
overhead of ~500 ns per http request on my machine. However, the margin of
error appears to be larger than that, therefor it should be reasonable to
assume that the overhead introduced by `CaptureMetrics` is absolutely
negligible.
## License
MIT

79
vendor/github.com/felixge/httpsnoop/capture_metrics.go generated vendored Normal file
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@ -0,0 +1,79 @@
package httpsnoop
import (
"io"
"net/http"
"time"
)
// Metrics holds metrics captured from CaptureMetrics.
type Metrics struct {
// Code is the first http response code passed to the WriteHeader func of
// the ResponseWriter. If no such call is made, a default code of 200 is
// assumed instead.
Code int
// Duration is the time it took to execute the handler.
Duration time.Duration
// Written is the number of bytes successfully written by the Write or
// ReadFrom function of the ResponseWriter. ResponseWriters may also write
// data to their underlaying connection directly (e.g. headers), but those
// are not tracked. Therefor the number of Written bytes will usually match
// the size of the response body.
Written int64
}
// CaptureMetrics wraps the given hnd, executes it with the given w and r, and
// returns the metrics it captured from it.
func CaptureMetrics(hnd http.Handler, w http.ResponseWriter, r *http.Request) Metrics {
return CaptureMetricsFn(w, func(ww http.ResponseWriter) {
hnd.ServeHTTP(ww, r)
})
}
// CaptureMetricsFn wraps w and calls fn with the wrapped w and returns the
// resulting metrics. This is very similar to CaptureMetrics (which is just
// sugar on top of this func), but is a more usable interface if your
// application doesn't use the Go http.Handler interface.
func CaptureMetricsFn(w http.ResponseWriter, fn func(http.ResponseWriter)) Metrics {
var (
start = time.Now()
m = Metrics{Code: http.StatusOK}
headerWritten bool
hooks = Hooks{
WriteHeader: func(next WriteHeaderFunc) WriteHeaderFunc {
return func(code int) {
next(code)
if !headerWritten {
m.Code = code
headerWritten = true
}
}
},
Write: func(next WriteFunc) WriteFunc {
return func(p []byte) (int, error) {
n, err := next(p)
m.Written += int64(n)
headerWritten = true
return n, err
}
},
ReadFrom: func(next ReadFromFunc) ReadFromFunc {
return func(src io.Reader) (int64, error) {
n, err := next(src)
headerWritten = true
m.Written += n
return n, err
}
},
}
)
fn(Wrap(w, hooks))
m.Duration = time.Since(start)
return m
}

10
vendor/github.com/felixge/httpsnoop/docs.go generated vendored Normal file
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@ -0,0 +1,10 @@
// Package httpsnoop provides an easy way to capture http related metrics (i.e.
// response time, bytes written, and http status code) from your application's
// http.Handlers.
//
// Doing this requires non-trivial wrapping of the http.ResponseWriter
// interface, which is also exposed for users interested in a more low-level
// API.
package httpsnoop
//go:generate go run codegen/main.go

3
vendor/github.com/felixge/httpsnoop/go.mod generated vendored Normal file
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@ -0,0 +1,3 @@
module github.com/felixge/httpsnoop
go 1.13

436
vendor/github.com/felixge/httpsnoop/wrap_generated_gteq_1.8.go generated vendored Normal file
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@ -0,0 +1,436 @@
// +build go1.8
// Code generated by "httpsnoop/codegen"; DO NOT EDIT
package httpsnoop
import (
"bufio"
"io"
"net"
"net/http"
)
// HeaderFunc is part of the http.ResponseWriter interface.
type HeaderFunc func() http.Header
// WriteHeaderFunc is part of the http.ResponseWriter interface.
type WriteHeaderFunc func(code int)
// WriteFunc is part of the http.ResponseWriter interface.
type WriteFunc func(b []byte) (int, error)
// FlushFunc is part of the http.Flusher interface.
type FlushFunc func()
// CloseNotifyFunc is part of the http.CloseNotifier interface.
type CloseNotifyFunc func() <-chan bool
// HijackFunc is part of the http.Hijacker interface.
type HijackFunc func() (net.Conn, *bufio.ReadWriter, error)
// ReadFromFunc is part of the io.ReaderFrom interface.
type ReadFromFunc func(src io.Reader) (int64, error)
// PushFunc is part of the http.Pusher interface.
type PushFunc func(target string, opts *http.PushOptions) error
// Hooks defines a set of method interceptors for methods included in
// http.ResponseWriter as well as some others. You can think of them as
// middleware for the function calls they target. See Wrap for more details.
type Hooks struct {
Header func(HeaderFunc) HeaderFunc
WriteHeader func(WriteHeaderFunc) WriteHeaderFunc
Write func(WriteFunc) WriteFunc
Flush func(FlushFunc) FlushFunc
CloseNotify func(CloseNotifyFunc) CloseNotifyFunc
Hijack func(HijackFunc) HijackFunc
ReadFrom func(ReadFromFunc) ReadFromFunc
Push func(PushFunc) PushFunc
}
// Wrap returns a wrapped version of w that provides the exact same interface
// as w. Specifically if w implements any combination of:
//
// - http.Flusher
// - http.CloseNotifier
// - http.Hijacker
// - io.ReaderFrom
// - http.Pusher
//
// The wrapped version will implement the exact same combination. If no hooks
// are set, the wrapped version also behaves exactly as w. Hooks targeting
// methods not supported by w are ignored. Any other hooks will intercept the
// method they target and may modify the call's arguments and/or return values.
// The CaptureMetrics implementation serves as a working example for how the
// hooks can be used.
func Wrap(w http.ResponseWriter, hooks Hooks) http.ResponseWriter {
rw := &rw{w: w, h: hooks}
_, i0 := w.(http.Flusher)
_, i1 := w.(http.CloseNotifier)
_, i2 := w.(http.Hijacker)
_, i3 := w.(io.ReaderFrom)
_, i4 := w.(http.Pusher)
switch {
// combination 1/32
case !i0 && !i1 && !i2 && !i3 && !i4:
return struct {
Unwrapper
http.ResponseWriter
}{rw, rw}
// combination 2/32
case !i0 && !i1 && !i2 && !i3 && i4:
return struct {
Unwrapper
http.ResponseWriter
http.Pusher
}{rw, rw, rw}
// combination 3/32
case !i0 && !i1 && !i2 && i3 && !i4:
return struct {
Unwrapper
http.ResponseWriter
io.ReaderFrom
}{rw, rw, rw}
// combination 4/32
case !i0 && !i1 && !i2 && i3 && i4:
return struct {
Unwrapper
http.ResponseWriter
io.ReaderFrom
http.Pusher
}{rw, rw, rw, rw}
// combination 5/32
case !i0 && !i1 && i2 && !i3 && !i4:
return struct {
Unwrapper
http.ResponseWriter
http.Hijacker
}{rw, rw, rw}
// combination 6/32
case !i0 && !i1 && i2 && !i3 && i4:
return struct {
Unwrapper
http.ResponseWriter
http.Hijacker
http.Pusher
}{rw, rw, rw, rw}
// combination 7/32
case !i0 && !i1 && i2 && i3 && !i4:
return struct {
Unwrapper
http.ResponseWriter
http.Hijacker
io.ReaderFrom
}{rw, rw, rw, rw}
// combination 8/32
case !i0 && !i1 && i2 && i3 && i4:
return struct {
Unwrapper
http.ResponseWriter
http.Hijacker
io.ReaderFrom
http.Pusher
}{rw, rw, rw, rw, rw}
// combination 9/32
case !i0 && i1 && !i2 && !i3 && !i4:
return struct {
Unwrapper
http.ResponseWriter
http.CloseNotifier
}{rw, rw, rw}
// combination 10/32
case !i0 && i1 && !i2 && !i3 && i4:
return struct {
Unwrapper
http.ResponseWriter
http.CloseNotifier
http.Pusher
}{rw, rw, rw, rw}
// combination 11/32
case !i0 && i1 && !i2 && i3 && !i4:
return struct {
Unwrapper
http.ResponseWriter
http.CloseNotifier
io.ReaderFrom
}{rw, rw, rw, rw}
// combination 12/32
case !i0 && i1 && !i2 && i3 && i4:
return struct {
Unwrapper
http.ResponseWriter
http.CloseNotifier
io.ReaderFrom
http.Pusher
}{rw, rw, rw, rw, rw}
// combination 13/32
case !i0 && i1 && i2 && !i3 && !i4:
return struct {
Unwrapper
http.ResponseWriter
http.CloseNotifier
http.Hijacker
}{rw, rw, rw, rw}
// combination 14/32
case !i0 && i1 && i2 && !i3 && i4:
return struct {
Unwrapper
http.ResponseWriter
http.CloseNotifier
http.Hijacker
http.Pusher
}{rw, rw, rw, rw, rw}
// combination 15/32
case !i0 && i1 && i2 && i3 && !i4:
return struct {
Unwrapper
http.ResponseWriter
http.CloseNotifier
http.Hijacker
io.ReaderFrom
}{rw, rw, rw, rw, rw}
// combination 16/32
case !i0 && i1 && i2 && i3 && i4:
return struct {
Unwrapper
http.ResponseWriter
http.CloseNotifier
http.Hijacker
io.ReaderFrom
http.Pusher
}{rw, rw, rw, rw, rw, rw}
// combination 17/32
case i0 && !i1 && !i2 && !i3 && !i4:
return struct {
Unwrapper
http.ResponseWriter
http.Flusher
}{rw, rw, rw}
// combination 18/32
case i0 && !i1 && !i2 && !i3 && i4:
return struct {
Unwrapper
http.ResponseWriter
http.Flusher
http.Pusher
}{rw, rw, rw, rw}
// combination 19/32
case i0 && !i1 && !i2 && i3 && !i4:
return struct {
Unwrapper
http.ResponseWriter
http.Flusher
io.ReaderFrom
}{rw, rw, rw, rw}
// combination 20/32
case i0 && !i1 && !i2 && i3 && i4:
return struct {
Unwrapper
http.ResponseWriter
http.Flusher
io.ReaderFrom
http.Pusher
}{rw, rw, rw, rw, rw}
// combination 21/32
case i0 && !i1 && i2 && !i3 && !i4:
return struct {
Unwrapper
http.ResponseWriter
http.Flusher
http.Hijacker
}{rw, rw, rw, rw}
// combination 22/32
case i0 && !i1 && i2 && !i3 && i4:
return struct {
Unwrapper
http.ResponseWriter
http.Flusher
http.Hijacker
http.Pusher
}{rw, rw, rw, rw, rw}
// combination 23/32
case i0 && !i1 && i2 && i3 && !i4:
return struct {
Unwrapper
http.ResponseWriter
http.Flusher
http.Hijacker
io.ReaderFrom
}{rw, rw, rw, rw, rw}
// combination 24/32
case i0 && !i1 && i2 && i3 && i4:
return struct {
Unwrapper
http.ResponseWriter
http.Flusher
http.Hijacker
io.ReaderFrom
http.Pusher
}{rw, rw, rw, rw, rw, rw}
// combination 25/32
case i0 && i1 && !i2 && !i3 && !i4:
return struct {
Unwrapper
http.ResponseWriter
http.Flusher
http.CloseNotifier
}{rw, rw, rw, rw}
// combination 26/32
case i0 && i1 && !i2 && !i3 && i4:
return struct {
Unwrapper
http.ResponseWriter
http.Flusher
http.CloseNotifier
http.Pusher
}{rw, rw, rw, rw, rw}
// combination 27/32
case i0 && i1 && !i2 && i3 && !i4:
return struct {
Unwrapper
http.ResponseWriter
http.Flusher
http.CloseNotifier
io.ReaderFrom
}{rw, rw, rw, rw, rw}
// combination 28/32
case i0 && i1 && !i2 && i3 && i4:
return struct {
Unwrapper
http.ResponseWriter
http.Flusher
http.CloseNotifier
io.ReaderFrom
http.Pusher
}{rw, rw, rw, rw, rw, rw}
// combination 29/32
case i0 && i1 && i2 && !i3 && !i4:
return struct {
Unwrapper
http.ResponseWriter
http.Flusher
http.CloseNotifier
http.Hijacker
}{rw, rw, rw, rw, rw}
// combination 30/32
case i0 && i1 && i2 && !i3 && i4:
return struct {
Unwrapper
http.ResponseWriter
http.Flusher
http.CloseNotifier
http.Hijacker
http.Pusher
}{rw, rw, rw, rw, rw, rw}
// combination 31/32
case i0 && i1 && i2 && i3 && !i4:
return struct {
Unwrapper
http.ResponseWriter
http.Flusher
http.CloseNotifier
http.Hijacker
io.ReaderFrom
}{rw, rw, rw, rw, rw, rw}
// combination 32/32
case i0 && i1 && i2 && i3 && i4:
return struct {
Unwrapper
http.ResponseWriter
http.Flusher
http.CloseNotifier
http.Hijacker
io.ReaderFrom
http.Pusher
}{rw, rw, rw, rw, rw, rw, rw}
}
panic("unreachable")
}
type rw struct {
w http.ResponseWriter
h Hooks
}
func (w *rw) Unwrap() http.ResponseWriter {
return w.w
}
func (w *rw) Header() http.Header {
f := w.w.(http.ResponseWriter).Header
if w.h.Header != nil {
f = w.h.Header(f)
}
return f()
}
func (w *rw) WriteHeader(code int) {
f := w.w.(http.ResponseWriter).WriteHeader
if w.h.WriteHeader != nil {
f = w.h.WriteHeader(f)
}
f(code)
}
func (w *rw) Write(b []byte) (int, error) {
f := w.w.(http.ResponseWriter).Write
if w.h.Write != nil {
f = w.h.Write(f)
}
return f(b)
}
func (w *rw) Flush() {
f := w.w.(http.Flusher).Flush
if w.h.Flush != nil {
f = w.h.Flush(f)
}
f()
}
func (w *rw) CloseNotify() <-chan bool {
f := w.w.(http.CloseNotifier).CloseNotify
if w.h.CloseNotify != nil {
f = w.h.CloseNotify(f)
}
return f()
}
func (w *rw) Hijack() (net.Conn, *bufio.ReadWriter, error) {
f := w.w.(http.Hijacker).Hijack
if w.h.Hijack != nil {
f = w.h.Hijack(f)
}
return f()
}
func (w *rw) ReadFrom(src io.Reader) (int64, error) {
f := w.w.(io.ReaderFrom).ReadFrom
if w.h.ReadFrom != nil {
f = w.h.ReadFrom(f)
}
return f(src)
}
func (w *rw) Push(target string, opts *http.PushOptions) error {
f := w.w.(http.Pusher).Push
if w.h.Push != nil {
f = w.h.Push(f)
}
return f(target, opts)
}
type Unwrapper interface {
Unwrap() http.ResponseWriter
}
// Unwrap returns the underlying http.ResponseWriter from within zero or more
// layers of httpsnoop wrappers.
func Unwrap(w http.ResponseWriter) http.ResponseWriter {
if rw, ok := w.(Unwrapper); ok {
// recurse until rw.Unwrap() returns a non-Unwrapper
return Unwrap(rw.Unwrap())
} else {
return w
}
}

278
vendor/github.com/felixge/httpsnoop/wrap_generated_lt_1.8.go generated vendored Normal file
View File

@ -0,0 +1,278 @@
// +build !go1.8
// Code generated by "httpsnoop/codegen"; DO NOT EDIT
package httpsnoop
import (
"bufio"
"io"
"net"
"net/http"
)
// HeaderFunc is part of the http.ResponseWriter interface.
type HeaderFunc func() http.Header
// WriteHeaderFunc is part of the http.ResponseWriter interface.
type WriteHeaderFunc func(code int)
// WriteFunc is part of the http.ResponseWriter interface.
type WriteFunc func(b []byte) (int, error)
// FlushFunc is part of the http.Flusher interface.
type FlushFunc func()
// CloseNotifyFunc is part of the http.CloseNotifier interface.
type CloseNotifyFunc func() <-chan bool
// HijackFunc is part of the http.Hijacker interface.
type HijackFunc func() (net.Conn, *bufio.ReadWriter, error)
// ReadFromFunc is part of the io.ReaderFrom interface.
type ReadFromFunc func(src io.Reader) (int64, error)
// Hooks defines a set of method interceptors for methods included in
// http.ResponseWriter as well as some others. You can think of them as
// middleware for the function calls they target. See Wrap for more details.
type Hooks struct {
Header func(HeaderFunc) HeaderFunc
WriteHeader func(WriteHeaderFunc) WriteHeaderFunc
Write func(WriteFunc) WriteFunc
Flush func(FlushFunc) FlushFunc
CloseNotify func(CloseNotifyFunc) CloseNotifyFunc
Hijack func(HijackFunc) HijackFunc
ReadFrom func(ReadFromFunc) ReadFromFunc
}
// Wrap returns a wrapped version of w that provides the exact same interface
// as w. Specifically if w implements any combination of:
//
// - http.Flusher
// - http.CloseNotifier
// - http.Hijacker
// - io.ReaderFrom
//
// The wrapped version will implement the exact same combination. If no hooks
// are set, the wrapped version also behaves exactly as w. Hooks targeting
// methods not supported by w are ignored. Any other hooks will intercept the
// method they target and may modify the call's arguments and/or return values.
// The CaptureMetrics implementation serves as a working example for how the
// hooks can be used.
func Wrap(w http.ResponseWriter, hooks Hooks) http.ResponseWriter {
rw := &rw{w: w, h: hooks}
_, i0 := w.(http.Flusher)
_, i1 := w.(http.CloseNotifier)
_, i2 := w.(http.Hijacker)
_, i3 := w.(io.ReaderFrom)
switch {
// combination 1/16
case !i0 && !i1 && !i2 && !i3:
return struct {
Unwrapper
http.ResponseWriter
}{rw, rw}
// combination 2/16
case !i0 && !i1 && !i2 && i3:
return struct {
Unwrapper
http.ResponseWriter
io.ReaderFrom
}{rw, rw, rw}
// combination 3/16
case !i0 && !i1 && i2 && !i3:
return struct {
Unwrapper
http.ResponseWriter
http.Hijacker
}{rw, rw, rw}
// combination 4/16
case !i0 && !i1 && i2 && i3:
return struct {
Unwrapper
http.ResponseWriter
http.Hijacker
io.ReaderFrom
}{rw, rw, rw, rw}
// combination 5/16
case !i0 && i1 && !i2 && !i3:
return struct {
Unwrapper
http.ResponseWriter
http.CloseNotifier
}{rw, rw, rw}
// combination 6/16
case !i0 && i1 && !i2 && i3:
return struct {
Unwrapper
http.ResponseWriter
http.CloseNotifier
io.ReaderFrom
}{rw, rw, rw, rw}
// combination 7/16
case !i0 && i1 && i2 && !i3:
return struct {
Unwrapper
http.ResponseWriter
http.CloseNotifier
http.Hijacker
}{rw, rw, rw, rw}
// combination 8/16
case !i0 && i1 && i2 && i3:
return struct {
Unwrapper
http.ResponseWriter
http.CloseNotifier
http.Hijacker
io.ReaderFrom
}{rw, rw, rw, rw, rw}
// combination 9/16
case i0 && !i1 && !i2 && !i3:
return struct {
Unwrapper
http.ResponseWriter
http.Flusher
}{rw, rw, rw}
// combination 10/16
case i0 && !i1 && !i2 && i3:
return struct {
Unwrapper
http.ResponseWriter
http.Flusher
io.ReaderFrom
}{rw, rw, rw, rw}
// combination 11/16
case i0 && !i1 && i2 && !i3:
return struct {
Unwrapper
http.ResponseWriter
http.Flusher
http.Hijacker
}{rw, rw, rw, rw}
// combination 12/16
case i0 && !i1 && i2 && i3:
return struct {
Unwrapper
http.ResponseWriter
http.Flusher
http.Hijacker
io.ReaderFrom
}{rw, rw, rw, rw, rw}
// combination 13/16
case i0 && i1 && !i2 && !i3:
return struct {
Unwrapper
http.ResponseWriter
http.Flusher
http.CloseNotifier
}{rw, rw, rw, rw}
// combination 14/16
case i0 && i1 && !i2 && i3:
return struct {
Unwrapper
http.ResponseWriter
http.Flusher
http.CloseNotifier
io.ReaderFrom
}{rw, rw, rw, rw, rw}
// combination 15/16
case i0 && i1 && i2 && !i3:
return struct {
Unwrapper
http.ResponseWriter
http.Flusher
http.CloseNotifier
http.Hijacker
}{rw, rw, rw, rw, rw}
// combination 16/16
case i0 && i1 && i2 && i3:
return struct {
Unwrapper
http.ResponseWriter
http.Flusher
http.CloseNotifier
http.Hijacker
io.ReaderFrom
}{rw, rw, rw, rw, rw, rw}
}
panic("unreachable")
}
type rw struct {
w http.ResponseWriter
h Hooks
}
func (w *rw) Unwrap() http.ResponseWriter {
return w.w
}
func (w *rw) Header() http.Header {
f := w.w.(http.ResponseWriter).Header
if w.h.Header != nil {
f = w.h.Header(f)
}
return f()
}
func (w *rw) WriteHeader(code int) {
f := w.w.(http.ResponseWriter).WriteHeader
if w.h.WriteHeader != nil {
f = w.h.WriteHeader(f)
}
f(code)
}
func (w *rw) Write(b []byte) (int, error) {
f := w.w.(http.ResponseWriter).Write
if w.h.Write != nil {
f = w.h.Write(f)
}
return f(b)
}
func (w *rw) Flush() {
f := w.w.(http.Flusher).Flush
if w.h.Flush != nil {
f = w.h.Flush(f)
}
f()
}
func (w *rw) CloseNotify() <-chan bool {
f := w.w.(http.CloseNotifier).CloseNotify
if w.h.CloseNotify != nil {
f = w.h.CloseNotify(f)
}
return f()
}
func (w *rw) Hijack() (net.Conn, *bufio.ReadWriter, error) {
f := w.w.(http.Hijacker).Hijack
if w.h.Hijack != nil {
f = w.h.Hijack(f)
}
return f()
}
func (w *rw) ReadFrom(src io.Reader) (int64, error) {
f := w.w.(io.ReaderFrom).ReadFrom
if w.h.ReadFrom != nil {
f = w.h.ReadFrom(f)
}
return f(src)
}
type Unwrapper interface {
Unwrap() http.ResponseWriter
}
// Unwrap returns the underlying http.ResponseWriter from within zero or more
// layers of httpsnoop wrappers.
func Unwrap(w http.ResponseWriter) http.ResponseWriter {
if rw, ok := w.(Unwrapper); ok {
// recurse until rw.Unwrap() returns a non-Unwrapper
return Unwrap(rw.Unwrap())
} else {
return w
}
}

43
vendor/go.opentelemetry.io/contrib/instrumentation/google.golang.org/grpc/otelgrpc/interceptor.go generated vendored
View File

@ -122,8 +122,7 @@ type streamEvent struct {
}
const (
closeEvent streamEventType = iota
receiveEndEvent
receiveEndEvent streamEventType = iota
errorEvent
)
@ -188,19 +187,12 @@ func (w *clientStream) CloseSend() error {
if err != nil {
w.sendStreamEvent(errorEvent, err)
} else {
w.sendStreamEvent(closeEvent, nil)
}
return err
}
const (
clientClosedState byte = 1 << iota
receiveEndedState
)
func wrapClientStream(s grpc.ClientStream, desc *grpc.StreamDesc) *clientStream {
func wrapClientStream(ctx context.Context, s grpc.ClientStream, desc *grpc.StreamDesc) *clientStream {
events := make(chan streamEvent)
eventsDone := make(chan struct{})
finished := make(chan error)
@ -208,23 +200,20 @@ func wrapClientStream(s grpc.ClientStream, desc *grpc.StreamDesc) *clientStream
go func() {
defer close(eventsDone)
// Both streams have to be closed
state := byte(0)
for event := range events {
switch event.Type {
case closeEvent:
state |= clientClosedState
case receiveEndEvent:
state |= receiveEndedState
case errorEvent:
finished <- event.Err
return
}
if state == clientClosedState|receiveEndedState {
finished <- nil
for {
select {
case <-ctx.Done():
finished <- ctx.Err()
return
case event := <-events:
switch event.Type {
case receiveEndEvent:
finished <- nil
return
case errorEvent:
finished <- event.Err
return
}
}
}
}()
@ -284,7 +273,7 @@ func StreamClientInterceptor(opts ...Option) grpc.StreamClientInterceptor {
span.End()
return s, err
}
stream := wrapClientStream(s, desc)
stream := wrapClientStream(ctx, s, desc)
go func() {
err := <-stream.finished

201
vendor/go.opentelemetry.io/contrib/instrumentation/net/http/httptrace/otelhttptrace/LICENSE generated vendored Normal file
View File

@ -0,0 +1,201 @@
Apache License
Version 2.0, January 2004
http://www.apache.org/licenses/
TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION
1. Definitions.
"License" shall mean the terms and conditions for use, reproduction,
and distribution as defined by Sections 1 through 9 of this document.
"Licensor" shall mean the copyright owner or entity authorized by
the copyright owner that is granting the License.
"Legal Entity" shall mean the union of the acting entity and all
other entities that control, are controlled by, or are under common
control with that entity. For the purposes of this definition,
"control" means (i) the power, direct or indirect, to cause the
direction or management of such entity, whether by contract or
otherwise, or (ii) ownership of fifty percent (50%) or more of the
outstanding shares, or (iii) beneficial ownership of such entity.
"You" (or "Your") shall mean an individual or Legal Entity
exercising permissions granted by this License.
"Source" form shall mean the preferred form for making modifications,
including but not limited to software source code, documentation
source, and configuration files.
"Object" form shall mean any form resulting from mechanical
transformation or translation of a Source form, including but
not limited to compiled object code, generated documentation,
and conversions to other media types.
"Work" shall mean the work of authorship, whether in Source or
Object form, made available under the License, as indicated by a
copyright notice that is included in or attached to the work
(an example is provided in the Appendix below).
"Derivative Works" shall mean any work, whether in Source or Object
form, that is based on (or derived from) the Work and for which the
editorial revisions, annotations, elaborations, or other modifications
represent, as a whole, an original work of authorship. For the purposes
of this License, Derivative Works shall not include works that remain
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the Work and Derivative Works thereof.
"Contribution" shall mean any work of authorship, including
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submitted to Licensor for inclusion in the Work by the copyright owner
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designated in writing by the copyright owner as "Not a Contribution."
"Contributor" shall mean Licensor and any individual or Legal Entity
on behalf of whom a Contribution has been received by Licensor and
subsequently incorporated within the Work.
2. Grant of Copyright License. Subject to the terms and conditions of
this License, each Contributor hereby grants to You a perpetual,
worldwide, non-exclusive, no-charge, royalty-free, irrevocable
copyright license to reproduce, prepare Derivative Works of,
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of any other Contributor, and only if You agree to indemnify,
defend, and hold each Contributor harmless for any liability
incurred by, or claims asserted against, such Contributor by reason
of your accepting any such warranty or additional liability.
END OF TERMS AND CONDITIONS
APPENDIX: How to apply the Apache License to your work.
To apply the Apache License to your work, attach the following
boilerplate notice, with the fields enclosed by brackets "[]"
replaced with your own identifying information. (Don't include
the brackets!) The text should be enclosed in the appropriate
comment syntax for the file format. We also recommend that a
file or class name and description of purpose be included on the
same "printed page" as the copyright notice for easier
identification within third-party archives.
Copyright [yyyy] [name of copyright owner]
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.

28
vendor/go.opentelemetry.io/contrib/instrumentation/net/http/httptrace/otelhttptrace/api.go generated vendored Normal file
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// Copyright The OpenTelemetry Authors
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package otelhttptrace
import (
"context"
"net/http"
"net/http/httptrace"
)
// W3C client.
func W3C(ctx context.Context, req *http.Request) (context.Context, *http.Request) {
ctx = httptrace.WithClientTrace(ctx, NewClientTrace(ctx))
req = req.WithContext(ctx)
return ctx, req
}

370
vendor/go.opentelemetry.io/contrib/instrumentation/net/http/httptrace/otelhttptrace/clienttrace.go generated vendored Normal file
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// Copyright The OpenTelemetry Authors
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package otelhttptrace
import (
"context"
"crypto/tls"
"net/http/httptrace"
"net/textproto"
"strings"
"sync"
"go.opentelemetry.io/contrib"
"go.opentelemetry.io/otel"
"go.opentelemetry.io/otel/attribute"
"go.opentelemetry.io/otel/codes"
semconv "go.opentelemetry.io/otel/semconv/v1.4.0"
"go.opentelemetry.io/otel/trace"
)
// HTTP attributes.
var (
HTTPStatus = attribute.Key("http.status")
HTTPHeaderMIME = attribute.Key("http.mime")
HTTPRemoteAddr = attribute.Key("http.remote")
HTTPLocalAddr = attribute.Key("http.local")
HTTPConnectionReused = attribute.Key("http.conn.reused")
HTTPConnectionWasIdle = attribute.Key("http.conn.wasidle")
HTTPConnectionIdleTime = attribute.Key("http.conn.idletime")
HTTPConnectionStartNetwork = attribute.Key("http.conn.start.network")
HTTPConnectionDoneNetwork = attribute.Key("http.conn.done.network")
HTTPConnectionDoneAddr = attribute.Key("http.conn.done.addr")
HTTPDNSAddrs = attribute.Key("http.dns.addrs")
)
var (
hookMap = map[string]string{
"http.dns": "http.getconn",
"http.connect": "http.getconn",
"http.tls": "http.getconn",
}
)
func parentHook(hook string) string {
if strings.HasPrefix(hook, "http.connect") {
return hookMap["http.connect"]
}
return hookMap[hook]
}
// ClientTraceOption allows customizations to how the httptrace.Client
// collects information.
type ClientTraceOption func(*clientTracer)
// WithoutSubSpans will modify the httptrace.Client to only collect data
// as Events and Attributes on a span found in the context. By default
// sub-spans will be generated.
func WithoutSubSpans() ClientTraceOption {
return func(ct *clientTracer) {
ct.useSpans = false
}
}
// WithRedactedHeaders will be replaced by fixed '****' values for the header
// names provided. These are in addition to the sensitive headers already
// redacted by default: Authorization, WWW-Authenticate, Proxy-Authenticate
// Proxy-Authorization, Cookie, Set-Cookie
func WithRedactedHeaders(headers ...string) ClientTraceOption {
return func(ct *clientTracer) {
for _, header := range headers {
ct.redactedHeaders[strings.ToLower(header)] = struct{}{}
}
}
}
// WithoutHeaders will disable adding span annotations for the http headers
// and values.
func WithoutHeaders() ClientTraceOption {
return func(ct *clientTracer) {
ct.addHeaders = false
}
}
type clientTracer struct {
context.Context
tr trace.Tracer
activeHooks map[string]context.Context
root trace.Span
mtx sync.Mutex
redactedHeaders map[string]struct{}
addHeaders bool
useSpans bool
}
func NewClientTrace(ctx context.Context, opts ...ClientTraceOption) *httptrace.ClientTrace {
ct := &clientTracer{
Context: ctx,
activeHooks: make(map[string]context.Context),
redactedHeaders: map[string]struct{}{
"authorization": {},
"www-authenticate": {},
"proxy-authenticate": {},
"proxy-authorization": {},
"cookie": {},
"set-cookie": {},
},
addHeaders: true,
useSpans: true,
}
for _, opt := range opts {
opt(ct)
}
var tp trace.TracerProvider
if span := trace.SpanFromContext(ctx); span.SpanContext().IsValid() {
tp = span.TracerProvider()
} else {
tp = otel.GetTracerProvider()
}
ct.tr = tp.Tracer(
"go.opentelemetry.io/otel/instrumentation/httptrace",
trace.WithInstrumentationVersion(contrib.SemVersion()),
)
return &httptrace.ClientTrace{
GetConn: ct.getConn,
GotConn: ct.gotConn,
PutIdleConn: ct.putIdleConn,
GotFirstResponseByte: ct.gotFirstResponseByte,
Got100Continue: ct.got100Continue,
Got1xxResponse: ct.got1xxResponse,
DNSStart: ct.dnsStart,
DNSDone: ct.dnsDone,
ConnectStart: ct.connectStart,
ConnectDone: ct.connectDone,
TLSHandshakeStart: ct.tlsHandshakeStart,
TLSHandshakeDone: ct.tlsHandshakeDone,
WroteHeaderField: ct.wroteHeaderField,
WroteHeaders: ct.wroteHeaders,
Wait100Continue: ct.wait100Continue,
WroteRequest: ct.wroteRequest,
}
}
func (ct *clientTracer) start(hook, spanName string, attrs ...attribute.KeyValue) {
if !ct.useSpans {
if ct.root == nil {
ct.root = trace.SpanFromContext(ct.Context)
}
ct.root.AddEvent(hook+".start", trace.WithAttributes(attrs...))
return
}
ct.mtx.Lock()
defer ct.mtx.Unlock()
if hookCtx, found := ct.activeHooks[hook]; !found {
var sp trace.Span
ct.activeHooks[hook], sp = ct.tr.Start(ct.getParentContext(hook), spanName, trace.WithAttributes(attrs...), trace.WithSpanKind(trace.SpanKindClient))
if ct.root == nil {
ct.root = sp
}
} else {
// end was called before start finished, add the start attributes and end the span here
span := trace.SpanFromContext(hookCtx)
span.SetAttributes(attrs...)
span.End()
delete(ct.activeHooks, hook)
}
}
func (ct *clientTracer) end(hook string, err error, attrs ...attribute.KeyValue) {
if !ct.useSpans {
if err != nil {
attrs = append(attrs, attribute.String(hook+".error", err.Error()))
}
ct.root.AddEvent(hook+".done", trace.WithAttributes(attrs...))
return
}
ct.mtx.Lock()
defer ct.mtx.Unlock()
if ctx, ok := ct.activeHooks[hook]; ok {
span := trace.SpanFromContext(ctx)
if err != nil {
span.SetStatus(codes.Error, err.Error())
}
span.SetAttributes(attrs...)
span.End()
delete(ct.activeHooks, hook)
} else {
// start is not finished before end is called.
// Start a span here with the ending attributes that will be finished when start finishes.
// Yes, it's backwards. v0v
ctx, span := ct.tr.Start(ct.getParentContext(hook), hook, trace.WithAttributes(attrs...), trace.WithSpanKind(trace.SpanKindClient))
if err != nil {
span.SetStatus(codes.Error, err.Error())
}
ct.activeHooks[hook] = ctx
}
}
func (ct *clientTracer) getParentContext(hook string) context.Context {
ctx, ok := ct.activeHooks[parentHook(hook)]
if !ok {
return ct.Context
}
return ctx
}
func (ct *clientTracer) span(hook string) trace.Span {
ct.mtx.Lock()
defer ct.mtx.Unlock()
if ctx, ok := ct.activeHooks[hook]; ok {
return trace.SpanFromContext(ctx)
}
return nil
}
func (ct *clientTracer) getConn(host string) {
ct.start("http.getconn", "http.getconn", semconv.HTTPHostKey.String(host))
}
func (ct *clientTracer) gotConn(info httptrace.GotConnInfo) {
attrs := []attribute.KeyValue{
HTTPRemoteAddr.String(info.Conn.RemoteAddr().String()),
HTTPLocalAddr.String(info.Conn.LocalAddr().String()),
HTTPConnectionReused.Bool(info.Reused),
HTTPConnectionWasIdle.Bool(info.WasIdle),
}
if info.WasIdle {
attrs = append(attrs, HTTPConnectionIdleTime.String(info.IdleTime.String()))
}
ct.end("http.getconn", nil, attrs...)
}
func (ct *clientTracer) putIdleConn(err error) {
ct.end("http.receive", err)
}
func (ct *clientTracer) gotFirstResponseByte() {
ct.start("http.receive", "http.receive")
}
func (ct *clientTracer) dnsStart(info httptrace.DNSStartInfo) {
ct.start("http.dns", "http.dns", semconv.HTTPHostKey.String(info.Host))
}
func (ct *clientTracer) dnsDone(info httptrace.DNSDoneInfo) {
var addrs []string
for _, netAddr := range info.Addrs {
addrs = append(addrs, netAddr.String())
}
ct.end("http.dns", info.Err, HTTPDNSAddrs.String(sliceToString(addrs)))
}
func (ct *clientTracer) connectStart(network, addr string) {
ct.start("http.connect."+addr, "http.connect",
HTTPRemoteAddr.String(addr),
HTTPConnectionStartNetwork.String(network),
)
}
func (ct *clientTracer) connectDone(network, addr string, err error) {
ct.end("http.connect."+addr, err,
HTTPConnectionDoneAddr.String(addr),
HTTPConnectionDoneNetwork.String(network),
)
}
func (ct *clientTracer) tlsHandshakeStart() {
ct.start("http.tls", "http.tls")
}
func (ct *clientTracer) tlsHandshakeDone(_ tls.ConnectionState, err error) {
ct.end("http.tls", err)
}
func (ct *clientTracer) wroteHeaderField(k string, v []string) {
if ct.useSpans && ct.span("http.headers") == nil {
ct.start("http.headers", "http.headers")
}
if !ct.addHeaders {
return
}
k = strings.ToLower(k)
value := sliceToString(v)
if _, ok := ct.redactedHeaders[k]; ok {
value = "****"
}
ct.root.SetAttributes(attribute.String("http."+k, value))
}
func (ct *clientTracer) wroteHeaders() {
if ct.useSpans && ct.span("http.headers") != nil {
ct.end("http.headers", nil)
}
ct.start("http.send", "http.send")
}
func (ct *clientTracer) wroteRequest(info httptrace.WroteRequestInfo) {
if info.Err != nil {
ct.root.SetStatus(codes.Error, info.Err.Error())
}
ct.end("http.send", info.Err)
}
func (ct *clientTracer) got100Continue() {
span := ct.root
if ct.useSpans {
span = ct.span("http.receive")
}
span.AddEvent("GOT 100 - Continue")
}
func (ct *clientTracer) wait100Continue() {
span := ct.root
if ct.useSpans {
span = ct.span("http.receive")
}
span.AddEvent("GOT 100 - Wait")
}
func (ct *clientTracer) got1xxResponse(code int, header textproto.MIMEHeader) error {
span := ct.root
if ct.useSpans {
span = ct.span("http.receive")
}
span.AddEvent("GOT 1xx", trace.WithAttributes(
HTTPStatus.Int(code),
HTTPHeaderMIME.String(sm2s(header)),
))
return nil
}
func sliceToString(value []string) string {
if len(value) == 0 {
return "undefined"
}
return strings.Join(value, ",")
}
func sm2s(value map[string][]string) string {
var buf strings.Builder
for k, v := range value {
if buf.Len() != 0 {
buf.WriteString(",")
}
buf.WriteString(k)
buf.WriteString("=")
buf.WriteString(sliceToString(v))
}
return buf.String()
}

14
vendor/go.opentelemetry.io/contrib/instrumentation/net/http/httptrace/otelhttptrace/go.mod generated vendored Normal file
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module go.opentelemetry.io/contrib/instrumentation/net/http/httptrace/otelhttptrace
go 1.15
replace go.opentelemetry.io/contrib => ../../../../..
require (
github.com/google/go-cmp v0.5.6
github.com/stretchr/testify v1.7.0
go.opentelemetry.io/contrib v0.21.0
go.opentelemetry.io/otel v1.0.0-RC1
go.opentelemetry.io/otel/oteltest v1.0.0-RC1
go.opentelemetry.io/otel/trace v1.0.0-RC1
)

21
vendor/go.opentelemetry.io/contrib/instrumentation/net/http/httptrace/otelhttptrace/go.sum generated vendored Normal file
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@ -0,0 +1,21 @@
github.com/davecgh/go-spew v1.1.0 h1:ZDRjVQ15GmhC3fiQ8ni8+OwkZQO4DARzQgrnXU1Liz8=
github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
github.com/google/go-cmp v0.5.6 h1:BKbKCqvP6I+rmFHt06ZmyQtvB8xAkWdhFyr0ZUNZcxQ=
github.com/google/go-cmp v0.5.6/go.mod h1:v8dTdLbMG2kIc/vJvl+f65V22dbkXbowE6jgT/gNBxE=
github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
github.com/stretchr/objx v0.1.0/go.mod h1:HFkY916IF+rwdDfMAkV7OtwuqBVzrE8GR6GFx+wExME=
github.com/stretchr/testify v1.7.0 h1:nwc3DEeHmmLAfoZucVR881uASk0Mfjw8xYJ99tb5CcY=
github.com/stretchr/testify v1.7.0/go.mod h1:6Fq8oRcR53rry900zMqJjRRixrwX3KX962/h/Wwjteg=
go.opentelemetry.io/otel v1.0.0-RC1 h1:4CeoX93DNTWt8awGK9JmNXzF9j7TyOu9upscEdtcdXc=
go.opentelemetry.io/otel v1.0.0-RC1/go.mod h1:x9tRa9HK4hSSq7jf2TKbqFbtt58/TGk0f9XiEYISI1I=
go.opentelemetry.io/otel/oteltest v1.0.0-RC1 h1:G685iP3XiskCwk/z0eIabL55XUl2gk0cljhGk9sB0Yk=
go.opentelemetry.io/otel/oteltest v1.0.0-RC1/go.mod h1:+eoIG0gdEOaPNftuy1YScLr1Gb4mL/9lpDkZ0JjMRq4=
go.opentelemetry.io/otel/trace v1.0.0-RC1 h1:jrjqKJZEibFrDz+umEASeU3LvdVyWKlnTh7XEfwrT58=
go.opentelemetry.io/otel/trace v1.0.0-RC1/go.mod h1:86UHmyHWFEtWjfWPSbu0+d0Pf9Q6e1U+3ViBOc+NXAg=
golang.org/x/xerrors v0.0.0-20191204190536-9bdfabe68543 h1:E7g+9GITq07hpfrRu66IVDexMakfv52eLZ2CXBWiKr4=
golang.org/x/xerrors v0.0.0-20191204190536-9bdfabe68543/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405 h1:yhCVgyC4o1eVCa2tZl7eS0r+SDo693bJlVdllGtEeKM=
gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
gopkg.in/yaml.v3 v3.0.0-20200313102051-9f266ea9e77c h1:dUUwHk2QECo/6vqA44rthZ8ie2QXMNeKRTHCNY2nXvo=
gopkg.in/yaml.v3 v3.0.0-20200313102051-9f266ea9e77c/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=

68
vendor/go.opentelemetry.io/contrib/instrumentation/net/http/httptrace/otelhttptrace/httptrace.go generated vendored Normal file
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// Copyright The OpenTelemetry Authors
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package otelhttptrace
import (
"context"
"net/http"
"go.opentelemetry.io/otel"
"go.opentelemetry.io/otel/attribute"
"go.opentelemetry.io/otel/baggage"
"go.opentelemetry.io/otel/propagation"
semconv "go.opentelemetry.io/otel/semconv/v1.4.0"
"go.opentelemetry.io/otel/trace"
)
// Option is a function that allows configuration of the httptrace Extract()
// and Inject() functions
type Option func(*config)
type config struct {
propagators propagation.TextMapPropagator
}
func newConfig(opts []Option) *config {
c := &config{propagators: otel.GetTextMapPropagator()}
for _, o := range opts {
o(c)
}
return c
}
// WithPropagators sets the propagators to use for Extraction and Injection
func WithPropagators(props propagation.TextMapPropagator) Option {
return func(c *config) {
c.propagators = props
}
}
// Extract returns the Attributes, Context Entries, and SpanContext that were encoded by Inject.
func Extract(ctx context.Context, req *http.Request, opts ...Option) ([]attribute.KeyValue, baggage.Baggage, trace.SpanContext) {
c := newConfig(opts)
ctx = c.propagators.Extract(ctx, propagation.HeaderCarrier(req.Header))
attrs := append(
semconv.HTTPServerAttributesFromHTTPRequest("", "", req),
semconv.NetAttributesFromHTTPRequest("tcp", req)...,
)
return attrs, baggage.FromContext(ctx), trace.SpanContextFromContext(ctx)
}
func Inject(ctx context.Context, req *http.Request, opts ...Option) {
c := newConfig(opts)
c.propagators.Inject(ctx, propagation.HeaderCarrier(req.Header))
}

201
vendor/go.opentelemetry.io/contrib/instrumentation/net/http/otelhttp/LICENSE generated vendored Normal file
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@ -0,0 +1,201 @@
Apache License
Version 2.0, January 2004
http://www.apache.org/licenses/
TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION
1. Definitions.
"License" shall mean the terms and conditions for use, reproduction,
and distribution as defined by Sections 1 through 9 of this document.
"Licensor" shall mean the copyright owner or entity authorized by
the copyright owner that is granting the License.
"Legal Entity" shall mean the union of the acting entity and all
other entities that control, are controlled by, or are under common
control with that entity. For the purposes of this definition,
"control" means (i) the power, direct or indirect, to cause the
direction or management of such entity, whether by contract or
otherwise, or (ii) ownership of fifty percent (50%) or more of the
outstanding shares, or (iii) beneficial ownership of such entity.
"You" (or "Your") shall mean an individual or Legal Entity
exercising permissions granted by this License.
"Source" form shall mean the preferred form for making modifications,
including but not limited to software source code, documentation
source, and configuration files.
"Object" form shall mean any form resulting from mechanical
transformation or translation of a Source form, including but
not limited to compiled object code, generated documentation,
and conversions to other media types.
"Work" shall mean the work of authorship, whether in Source or
Object form, made available under the License, as indicated by a
copyright notice that is included in or attached to the work
(an example is provided in the Appendix below).
"Derivative Works" shall mean any work, whether in Source or Object
form, that is based on (or derived from) the Work and for which the
editorial revisions, annotations, elaborations, or other modifications
represent, as a whole, an original work of authorship. For the purposes
of this License, Derivative Works shall not include works that remain
separable from, or merely link (or bind by name) to the interfaces of,
the Work and Derivative Works thereof.
"Contribution" shall mean any work of authorship, including
the original version of the Work and any modifications or additions
to that Work or Derivative Works thereof, that is intentionally
submitted to Licensor for inclusion in the Work by the copyright owner
or by an individual or Legal Entity authorized to submit on behalf of
the copyright owner. For the purposes of this definition, "submitted"
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to the Licensor or its representatives, including but not limited to
communication on electronic mailing lists, source code control systems,
and issue tracking systems that are managed by, or on behalf of, the
Licensor for the purpose of discussing and improving the Work, but
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designated in writing by the copyright owner as "Not a Contribution."
"Contributor" shall mean Licensor and any individual or Legal Entity
on behalf of whom a Contribution has been received by Licensor and
subsequently incorporated within the Work.
2. Grant of Copyright License. Subject to the terms and conditions of
this License, each Contributor hereby grants to You a perpetual,
worldwide, non-exclusive, no-charge, royalty-free, irrevocable
copyright license to reproduce, prepare Derivative Works of,
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Work and such Derivative Works in Source or Object form.
3. Grant of Patent License. Subject to the terms and conditions of
this License, each Contributor hereby grants to You a perpetual,
worldwide, non-exclusive, no-charge, royalty-free, irrevocable
(except as stated in this section) patent license to make, have made,
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or a Contribution incorporated within the Work constitutes direct
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as of the date such litigation is filed.
4. Redistribution. You may reproduce and distribute copies of the
Work or Derivative Works thereof in any medium, with or without
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meet the following conditions:
(a) You must give any other recipients of the Work or
Derivative Works a copy of this License; and
(b) You must cause any modified files to carry prominent notices
stating that You changed the files; and
(c) You must retain, in the Source form of any Derivative Works
that You distribute, all copyright, patent, trademark, and
attribution notices from the Source form of the Work,
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(d) If the Work includes a "NOTICE" text file as part of its
distribution, then any Derivative Works that You distribute must
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within such NOTICE file, excluding those notices that do not
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of the following places: within a NOTICE text file distributed
as part of the Derivative Works; within the Source form or
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within a display generated by the Derivative Works, if and
wherever such third-party notices normally appear. The contents
of the NOTICE file are for informational purposes only and
do not modify the License. You may add Your own attribution
notices within Derivative Works that You distribute, alongside
or as an addendum to the NOTICE text from the Work, provided
that such additional attribution notices cannot be construed
as modifying the License.
You may add Your own copyright statement to Your modifications and
may provide additional or different license terms and conditions
for use, reproduction, or distribution of Your modifications, or
for any such Derivative Works as a whole, provided Your use,
reproduction, and distribution of the Work otherwise complies with
the conditions stated in this License.
5. Submission of Contributions. Unless You explicitly state otherwise,
any Contribution intentionally submitted for inclusion in the Work
by You to the Licensor shall be under the terms and conditions of
this License, without any additional terms or conditions.
Notwithstanding the above, nothing herein shall supersede or modify
the terms of any separate license agreement you may have executed
with Licensor regarding such Contributions.
6. Trademarks. This License does not grant permission to use the trade
names, trademarks, service marks, or product names of the Licensor,
except as required for reasonable and customary use in describing the
origin of the Work and reproducing the content of the NOTICE file.
7. Disclaimer of Warranty. Unless required by applicable law or
agreed to in writing, Licensor provides the Work (and each
Contributor provides its Contributions) on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
implied, including, without limitation, any warranties or conditions
of TITLE, NON-INFRINGEMENT, MERCHANTABILITY, or FITNESS FOR A
PARTICULAR PURPOSE. You are solely responsible for determining the
appropriateness of using or redistributing the Work and assume any
risks associated with Your exercise of permissions under this License.
8. Limitation of Liability. In no event and under no legal theory,
whether in tort (including negligence), contract, or otherwise,
unless required by applicable law (such as deliberate and grossly
negligent acts) or agreed to in writing, shall any Contributor be
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Work (including but not limited to damages for loss of goodwill,
work stoppage, computer failure or malfunction, or any and all
other commercial damages or losses), even if such Contributor
has been advised of the possibility of such damages.
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the Work or Derivative Works thereof, You may choose to offer,
and charge a fee for, acceptance of support, warranty, indemnity,
or other liability obligations and/or rights consistent with this
License. However, in accepting such obligations, You may act only
on Your own behalf and on Your sole responsibility, not on behalf
of any other Contributor, and only if You agree to indemnify,
defend, and hold each Contributor harmless for any liability
incurred by, or claims asserted against, such Contributor by reason
of your accepting any such warranty or additional liability.
END OF TERMS AND CONDITIONS
APPENDIX: How to apply the Apache License to your work.
To apply the Apache License to your work, attach the following
boilerplate notice, with the fields enclosed by brackets "[]"
replaced with your own identifying information. (Don't include
the brackets!) The text should be enclosed in the appropriate
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Copyright [yyyy] [name of copyright owner]
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
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Unless required by applicable law or agreed to in writing, software
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61
vendor/go.opentelemetry.io/contrib/instrumentation/net/http/otelhttp/client.go generated vendored Normal file
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// Copyright The OpenTelemetry Authors
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package otelhttp
import (
"context"
"io"
"net/http"
"net/url"
"strings"
)
// DefaultClient is the default Client and is used by Get, Head, Post and PostForm.
// Please be careful of intitialization order - for example, if you change
// the global propagator, the DefaultClient might still be using the old one
var DefaultClient = &http.Client{Transport: NewTransport(http.DefaultTransport)}
// Get is a convenient replacement for http.Get that adds a span around the request.
func Get(ctx context.Context, url string) (resp *http.Response, err error) {
req, err := http.NewRequestWithContext(ctx, "GET", url, nil)
if err != nil {
return nil, err
}
return DefaultClient.Do(req)
}
// Head is a convenient replacement for http.Head that adds a span around the request.
func Head(ctx context.Context, url string) (resp *http.Response, err error) {
req, err := http.NewRequestWithContext(ctx, "HEAD", url, nil)
if err != nil {
return nil, err
}
return DefaultClient.Do(req)
}
// Post is a convenient replacement for http.Post that adds a span around the request.
func Post(ctx context.Context, url, contentType string, body io.Reader) (resp *http.Response, err error) {
req, err := http.NewRequestWithContext(ctx, "POST", url, body)
if err != nil {
return nil, err
}
req.Header.Set("Content-Type", contentType)
return DefaultClient.Do(req)
}
// PostForm is a convenient replacement for http.PostForm that adds a span around the request.
func PostForm(ctx context.Context, url string, data url.Values) (resp *http.Response, err error) {
return Post(ctx, url, "application/x-www-form-urlencoded", strings.NewReader(data.Encode()))
}

47
vendor/go.opentelemetry.io/contrib/instrumentation/net/http/otelhttp/common.go generated vendored Normal file
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// Copyright The OpenTelemetry Authors
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package otelhttp
import (
"net/http"
"go.opentelemetry.io/contrib"
"go.opentelemetry.io/otel/attribute"
"go.opentelemetry.io/otel/trace"
)
// Attribute keys that can be added to a span.
const (
ReadBytesKey = attribute.Key("http.read_bytes") // if anything was read from the request body, the total number of bytes read
ReadErrorKey = attribute.Key("http.read_error") // If an error occurred while reading a request, the string of the error (io.EOF is not recorded)
WroteBytesKey = attribute.Key("http.wrote_bytes") // if anything was written to the response writer, the total number of bytes written
WriteErrorKey = attribute.Key("http.write_error") // if an error occurred while writing a reply, the string of the error (io.EOF is not recorded)
)
// Server HTTP metrics
const (
RequestCount = "http.server.request_count" // Incoming request count total
RequestContentLength = "http.server.request_content_length" // Incoming request bytes total
ResponseContentLength = "http.server.response_content_length" // Incoming response bytes total
ServerLatency = "http.server.duration" // Incoming end to end duration, microseconds
)
// Filter is a predicate used to determine whether a given http.request should
// be traced. A Filter must return true if the request should be traced.
type Filter func(*http.Request) bool
func newTracer(tp trace.TracerProvider) trace.Tracer {
return tp.Tracer(instrumentationName, trace.WithInstrumentationVersion(contrib.SemVersion()))
}

181
vendor/go.opentelemetry.io/contrib/instrumentation/net/http/otelhttp/config.go generated vendored Normal file
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// Copyright The OpenTelemetry Authors
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package otelhttp
import (
"context"
"net/http"
"net/http/httptrace"
"go.opentelemetry.io/contrib"
"go.opentelemetry.io/otel"
"go.opentelemetry.io/otel/metric"
"go.opentelemetry.io/otel/metric/global"
"go.opentelemetry.io/otel/propagation"
"go.opentelemetry.io/otel/trace"
)
const (
instrumentationName = "go.opentelemetry.io/contrib/instrumentation/net/http/otelhttp"
)
// config represents the configuration options available for the http.Handler
// and http.Transport types.
type config struct {
Tracer trace.Tracer
Meter metric.Meter
Propagators propagation.TextMapPropagator
SpanStartOptions []trace.SpanStartOption
ReadEvent bool
WriteEvent bool
Filters []Filter
SpanNameFormatter func(string, *http.Request) string
ClientTrace func(context.Context) *httptrace.ClientTrace
TracerProvider trace.TracerProvider
MeterProvider metric.MeterProvider
}
// Option interface used for setting optional config properties.
type Option interface {
apply(*config)
}
type optionFunc func(*config)
func (o optionFunc) apply(c *config) {
o(c)
}
// newConfig creates a new config struct and applies opts to it.
func newConfig(opts ...Option) *config {
c := &config{
Propagators: otel.GetTextMapPropagator(),
MeterProvider: global.GetMeterProvider(),
}
for _, opt := range opts {
opt.apply(c)
}
// Tracer is only initialized if manually specified. Otherwise, can be passed with the tracing context.
if c.TracerProvider != nil {
c.Tracer = newTracer(c.TracerProvider)
}
c.Meter = c.MeterProvider.Meter(
instrumentationName,
metric.WithInstrumentationVersion(contrib.SemVersion()),
)
return c
}
// WithTracerProvider specifies a tracer provider to use for creating a tracer.
// If none is specified, the global provider is used.
func WithTracerProvider(provider trace.TracerProvider) Option {
return optionFunc(func(cfg *config) {
cfg.TracerProvider = provider
})
}
// WithMeterProvider specifies a meter provider to use for creating a meter.
// If none is specified, the global provider is used.
func WithMeterProvider(provider metric.MeterProvider) Option {
return optionFunc(func(cfg *config) {
cfg.MeterProvider = provider
})
}
// WithPublicEndpoint configures the Handler to link the span with an incoming
// span context. If this option is not provided, then the association is a child
// association instead of a link.
func WithPublicEndpoint() Option {
return optionFunc(func(c *config) {
c.SpanStartOptions = append(c.SpanStartOptions, trace.WithNewRoot())
})
}
// WithPropagators configures specific propagators. If this
// option isn't specified then
func WithPropagators(ps propagation.TextMapPropagator) Option {
return optionFunc(func(c *config) {
c.Propagators = ps
})
}
// WithSpanOptions configures an additional set of
// trace.SpanOptions, which are applied to each new span.
func WithSpanOptions(opts ...trace.SpanStartOption) Option {
return optionFunc(func(c *config) {
c.SpanStartOptions = append(c.SpanStartOptions, opts...)
})
}
// WithFilter adds a filter to the list of filters used by the handler.
// If any filter indicates to exclude a request then the request will not be
// traced. All filters must allow a request to be traced for a Span to be created.
// If no filters are provided then all requests are traced.
// Filters will be invoked for each processed request, it is advised to make them
// simple and fast.
func WithFilter(f Filter) Option {
return optionFunc(func(c *config) {
c.Filters = append(c.Filters, f)
})
}
type event int
// Different types of events that can be recorded, see WithMessageEvents
const (
ReadEvents event = iota
WriteEvents
)
// WithMessageEvents configures the Handler to record the specified events
// (span.AddEvent) on spans. By default only summary attributes are added at the
// end of the request.
//
// Valid events are:
// * ReadEvents: Record the number of bytes read after every http.Request.Body.Read
// using the ReadBytesKey
// * WriteEvents: Record the number of bytes written after every http.ResponeWriter.Write
// using the WriteBytesKey
func WithMessageEvents(events ...event) Option {
return optionFunc(func(c *config) {
for _, e := range events {
switch e {
case ReadEvents:
c.ReadEvent = true
case WriteEvents:
c.WriteEvent = true
}
}
})
}
// WithSpanNameFormatter takes a function that will be called on every
// request and the returned string will become the Span Name
func WithSpanNameFormatter(f func(operation string, r *http.Request) string) Option {
return optionFunc(func(c *config) {
c.SpanNameFormatter = f
})
}
// WithClientTrace takes a function that returns client trace instance that will be
// applied to the requests sent through the otelhttp Transport.
func WithClientTrace(f func(context.Context) *httptrace.ClientTrace) Option {
return optionFunc(func(c *config) {
c.ClientTrace = f
})
}

18
vendor/go.opentelemetry.io/contrib/instrumentation/net/http/otelhttp/doc.go generated vendored Normal file
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@ -0,0 +1,18 @@
// Copyright The OpenTelemetry Authors
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
// Package otelhttp provides an http.Handler and functions that are intended
// to be used to add tracing by wrapping existing handlers (with Handler) and
// routes WithRouteTag.
package otelhttp // import "go.opentelemetry.io/contrib/instrumentation/net/http/otelhttp"

15
vendor/go.opentelemetry.io/contrib/instrumentation/net/http/otelhttp/go.mod generated vendored Normal file
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@ -0,0 +1,15 @@
module go.opentelemetry.io/contrib/instrumentation/net/http/otelhttp
go 1.15
replace go.opentelemetry.io/contrib => ../../../..
require (
github.com/felixge/httpsnoop v1.0.2
github.com/stretchr/testify v1.7.0
go.opentelemetry.io/contrib v0.21.0
go.opentelemetry.io/otel v1.0.0-RC1
go.opentelemetry.io/otel/metric v0.21.0
go.opentelemetry.io/otel/oteltest v1.0.0-RC1
go.opentelemetry.io/otel/trace v1.0.0-RC1
)

27
vendor/go.opentelemetry.io/contrib/instrumentation/net/http/otelhttp/go.sum generated vendored Normal file
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@ -0,0 +1,27 @@
github.com/davecgh/go-spew v1.1.0 h1:ZDRjVQ15GmhC3fiQ8ni8+OwkZQO4DARzQgrnXU1Liz8=
github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
github.com/felixge/httpsnoop v1.0.2 h1:+nS9g82KMXccJ/wp0zyRW9ZBHFETmMGtkk+2CTTrW4o=
github.com/felixge/httpsnoop v1.0.2/go.mod h1:m8KPJKqk1gH5J9DgRY2ASl2lWCfGKXixSwevea8zH2U=
github.com/google/go-cmp v0.5.6 h1:BKbKCqvP6I+rmFHt06ZmyQtvB8xAkWdhFyr0ZUNZcxQ=
github.com/google/go-cmp v0.5.6/go.mod h1:v8dTdLbMG2kIc/vJvl+f65V22dbkXbowE6jgT/gNBxE=
github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
github.com/stretchr/objx v0.1.0/go.mod h1:HFkY916IF+rwdDfMAkV7OtwuqBVzrE8GR6GFx+wExME=
github.com/stretchr/testify v1.7.0 h1:nwc3DEeHmmLAfoZucVR881uASk0Mfjw8xYJ99tb5CcY=
github.com/stretchr/testify v1.7.0/go.mod h1:6Fq8oRcR53rry900zMqJjRRixrwX3KX962/h/Wwjteg=
go.opentelemetry.io/otel v1.0.0-RC1 h1:4CeoX93DNTWt8awGK9JmNXzF9j7TyOu9upscEdtcdXc=
go.opentelemetry.io/otel v1.0.0-RC1/go.mod h1:x9tRa9HK4hSSq7jf2TKbqFbtt58/TGk0f9XiEYISI1I=
go.opentelemetry.io/otel/internal/metric v0.21.0 h1:gZlIBo5O51hZOOZz8vEcuRx/l5dnADadKfpT70AELoo=
go.opentelemetry.io/otel/internal/metric v0.21.0/go.mod h1:iOfAaY2YycsXfYD4kaRSbLx2LKmfpKObWBEv9QK5zFo=
go.opentelemetry.io/otel/metric v0.21.0 h1:ZtcJlHqVE4l8Su0WOLOd9fEPheJuYEiQ0wr9wv2p25I=
go.opentelemetry.io/otel/metric v0.21.0/go.mod h1:JWCt1bjivC4iCrz/aCrM1GSw+ZcvY44KCbaeeRhzHnc=
go.opentelemetry.io/otel/oteltest v1.0.0-RC1 h1:G685iP3XiskCwk/z0eIabL55XUl2gk0cljhGk9sB0Yk=
go.opentelemetry.io/otel/oteltest v1.0.0-RC1/go.mod h1:+eoIG0gdEOaPNftuy1YScLr1Gb4mL/9lpDkZ0JjMRq4=
go.opentelemetry.io/otel/trace v1.0.0-RC1 h1:jrjqKJZEibFrDz+umEASeU3LvdVyWKlnTh7XEfwrT58=
go.opentelemetry.io/otel/trace v1.0.0-RC1/go.mod h1:86UHmyHWFEtWjfWPSbu0+d0Pf9Q6e1U+3ViBOc+NXAg=
golang.org/x/xerrors v0.0.0-20191204190536-9bdfabe68543 h1:E7g+9GITq07hpfrRu66IVDexMakfv52eLZ2CXBWiKr4=
golang.org/x/xerrors v0.0.0-20191204190536-9bdfabe68543/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405 h1:yhCVgyC4o1eVCa2tZl7eS0r+SDo693bJlVdllGtEeKM=
gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
gopkg.in/yaml.v3 v3.0.0-20200313102051-9f266ea9e77c h1:dUUwHk2QECo/6vqA44rthZ8ie2QXMNeKRTHCNY2nXvo=
gopkg.in/yaml.v3 v3.0.0-20200313102051-9f266ea9e77c/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=

235
vendor/go.opentelemetry.io/contrib/instrumentation/net/http/otelhttp/handler.go generated vendored Normal file
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// Copyright The OpenTelemetry Authors
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package otelhttp
import (
"io"
"net/http"
"time"
"github.com/felixge/httpsnoop"
"go.opentelemetry.io/otel"
"go.opentelemetry.io/otel/attribute"
"go.opentelemetry.io/otel/metric"
"go.opentelemetry.io/otel/propagation"
semconv "go.opentelemetry.io/otel/semconv/v1.4.0"
"go.opentelemetry.io/otel/trace"
)
var _ http.Handler = &Handler{}
// Handler is http middleware that corresponds to the http.Handler interface and
// is designed to wrap a http.Mux (or equivalent), while individual routes on
// the mux are wrapped with WithRouteTag. A Handler will add various attributes
// to the span using the attribute.Keys defined in this package.
type Handler struct {
operation string
handler http.Handler
tracer trace.Tracer
meter metric.Meter
propagators propagation.TextMapPropagator
spanStartOptions []trace.SpanStartOption
readEvent bool
writeEvent bool
filters []Filter
spanNameFormatter func(string, *http.Request) string
counters map[string]metric.Int64Counter
valueRecorders map[string]metric.Int64ValueRecorder
}
func defaultHandlerFormatter(operation string, _ *http.Request) string {
return operation
}
// NewHandler wraps the passed handler, functioning like middleware, in a span
// named after the operation and with any provided Options.
func NewHandler(handler http.Handler, operation string, opts ...Option) http.Handler {
h := Handler{
handler: handler,
operation: operation,
}
defaultOpts := []Option{
WithSpanOptions(trace.WithSpanKind(trace.SpanKindServer)),
WithSpanNameFormatter(defaultHandlerFormatter),
}
c := newConfig(append(defaultOpts, opts...)...)
h.configure(c)
h.createMeasures()
return &h
}
func (h *Handler) configure(c *config) {
h.tracer = c.Tracer
h.meter = c.Meter
h.propagators = c.Propagators
h.spanStartOptions = c.SpanStartOptions
h.readEvent = c.ReadEvent
h.writeEvent = c.WriteEvent
h.filters = c.Filters
h.spanNameFormatter = c.SpanNameFormatter
}
func handleErr(err error) {
if err != nil {
otel.Handle(err)
}
}
func (h *Handler) createMeasures() {
h.counters = make(map[string]metric.Int64Counter)
h.valueRecorders = make(map[string]metric.Int64ValueRecorder)
requestBytesCounter, err := h.meter.NewInt64Counter(RequestContentLength)
handleErr(err)
responseBytesCounter, err := h.meter.NewInt64Counter(ResponseContentLength)
handleErr(err)
serverLatencyMeasure, err := h.meter.NewInt64ValueRecorder(ServerLatency)
handleErr(err)
h.counters[RequestContentLength] = requestBytesCounter
h.counters[ResponseContentLength] = responseBytesCounter
h.valueRecorders[ServerLatency] = serverLatencyMeasure
}
// ServeHTTP serves HTTP requests (http.Handler)
func (h *Handler) ServeHTTP(w http.ResponseWriter, r *http.Request) {
requestStartTime := time.Now()
for _, f := range h.filters {
if !f(r) {
// Simply pass through to the handler if a filter rejects the request
h.handler.ServeHTTP(w, r)
return
}
}
opts := append([]trace.SpanStartOption{
trace.WithAttributes(semconv.NetAttributesFromHTTPRequest("tcp", r)...),
trace.WithAttributes(semconv.EndUserAttributesFromHTTPRequest(r)...),
trace.WithAttributes(semconv.HTTPServerAttributesFromHTTPRequest(h.operation, "", r)...),
}, h.spanStartOptions...) // start with the configured options
tracer := h.tracer
if tracer == nil {
if span := trace.SpanFromContext(r.Context()); span.SpanContext().IsValid() {
tracer = newTracer(span.TracerProvider())
} else {
tracer = newTracer(otel.GetTracerProvider())
}
}
ctx := h.propagators.Extract(r.Context(), propagation.HeaderCarrier(r.Header))
ctx, span := tracer.Start(ctx, h.spanNameFormatter(h.operation, r), opts...)
defer span.End()
readRecordFunc := func(int64) {}
if h.readEvent {
readRecordFunc = func(n int64) {
span.AddEvent("read", trace.WithAttributes(ReadBytesKey.Int64(n)))
}
}
var bw bodyWrapper
// if request body is nil we don't want to mutate the body as it will affect
// the identity of it in a unforeseeable way because we assert ReadCloser
// fullfills a certain interface and it is indeed nil.
if r.Body != nil {
bw.ReadCloser = r.Body
bw.record = readRecordFunc
r.Body = &bw
}
writeRecordFunc := func(int64) {}
if h.writeEvent {
writeRecordFunc = func(n int64) {
span.AddEvent("write", trace.WithAttributes(WroteBytesKey.Int64(n)))
}
}
rww := &respWriterWrapper{ResponseWriter: w, record: writeRecordFunc, ctx: ctx, props: h.propagators}
// Wrap w to use our ResponseWriter methods while also exposing
// other interfaces that w may implement (http.CloseNotifier,
// http.Flusher, http.Hijacker, http.Pusher, io.ReaderFrom).
w = httpsnoop.Wrap(w, httpsnoop.Hooks{
Header: func(httpsnoop.HeaderFunc) httpsnoop.HeaderFunc {
return rww.Header
},
Write: func(httpsnoop.WriteFunc) httpsnoop.WriteFunc {
return rww.Write
},
WriteHeader: func(httpsnoop.WriteHeaderFunc) httpsnoop.WriteHeaderFunc {
return rww.WriteHeader
},
})
labeler := &Labeler{}
ctx = injectLabeler(ctx, labeler)
h.handler.ServeHTTP(w, r.WithContext(ctx))
setAfterServeAttributes(span, bw.read, rww.written, rww.statusCode, bw.err, rww.err)
// Add metrics
attributes := append(labeler.Get(), semconv.HTTPServerMetricAttributesFromHTTPRequest(h.operation, r)...)
h.counters[RequestContentLength].Add(ctx, bw.read, attributes...)
h.counters[ResponseContentLength].Add(ctx, rww.written, attributes...)
elapsedTime := time.Since(requestStartTime).Microseconds()
h.valueRecorders[ServerLatency].Record(ctx, elapsedTime, attributes...)
}
func setAfterServeAttributes(span trace.Span, read, wrote int64, statusCode int, rerr, werr error) {
attributes := []attribute.KeyValue{}
// TODO: Consider adding an event after each read and write, possibly as an
// option (defaulting to off), so as to not create needlessly verbose spans.
if read > 0 {
attributes = append(attributes, ReadBytesKey.Int64(read))
}
if rerr != nil && rerr != io.EOF {
attributes = append(attributes, ReadErrorKey.String(rerr.Error()))
}
if wrote > 0 {
attributes = append(attributes, WroteBytesKey.Int64(wrote))
}
if statusCode > 0 {
attributes = append(attributes, semconv.HTTPAttributesFromHTTPStatusCode(statusCode)...)
span.SetStatus(semconv.SpanStatusFromHTTPStatusCode(statusCode))
}
if werr != nil && werr != io.EOF {
attributes = append(attributes, WriteErrorKey.String(werr.Error()))
}
span.SetAttributes(attributes...)
}
// WithRouteTag annotates a span with the provided route name using the
// RouteKey Tag.
func WithRouteTag(route string, h http.Handler) http.Handler {
return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
span := trace.SpanFromContext(r.Context())
span.SetAttributes(semconv.HTTPRouteKey.String(route))
h.ServeHTTP(w, r)
})
}

65
vendor/go.opentelemetry.io/contrib/instrumentation/net/http/otelhttp/labeler.go generated vendored Normal file
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// Copyright The OpenTelemetry Authors
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package otelhttp
import (
"context"
"sync"
"go.opentelemetry.io/otel/attribute"
)
// Labeler is used to allow instrumented HTTP handlers to add custom attributes to
// the metrics recorded by the net/http instrumentation.
type Labeler struct {
mu sync.Mutex
attributes []attribute.KeyValue
}
// Add attributes to a Labeler.
func (l *Labeler) Add(ls ...attribute.KeyValue) {
l.mu.Lock()
defer l.mu.Unlock()
l.attributes = append(l.attributes, ls...)
}
// Get returns a copy of the attributes added to the Labeler.
func (l *Labeler) Get() []attribute.KeyValue {
l.mu.Lock()
defer l.mu.Unlock()
ret := make([]attribute.KeyValue, len(l.attributes))
copy(ret, l.attributes)
return ret
}
type labelerContextKeyType int
const lablelerContextKey labelerContextKeyType = 0
func injectLabeler(ctx context.Context, l *Labeler) context.Context {
return context.WithValue(ctx, lablelerContextKey, l)
}
// LabelerFromContext retrieves a Labeler instance from the provided context if
// one is available. If no Labeler was found in the provided context a new, empty
// Labeler is returned and the second return value is false. In this case it is
// safe to use the Labeler but any attributes added to it will not be used.
func LabelerFromContext(ctx context.Context) (*Labeler, bool) {
l, ok := ctx.Value(lablelerContextKey).(*Labeler)
if !ok {
l = &Labeler{}
}
return l, ok
}

154
vendor/go.opentelemetry.io/contrib/instrumentation/net/http/otelhttp/transport.go generated vendored Normal file
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// Copyright The OpenTelemetry Authors
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package otelhttp
import (
"context"
"io"
"net/http"
"net/http/httptrace"
"go.opentelemetry.io/otel"
"go.opentelemetry.io/otel/propagation"
semconv "go.opentelemetry.io/otel/semconv/v1.4.0"
"go.opentelemetry.io/otel/trace"
)
// Transport implements the http.RoundTripper interface and wraps
// outbound HTTP(S) requests with a span.
type Transport struct {
rt http.RoundTripper
tracer trace.Tracer
propagators propagation.TextMapPropagator
spanStartOptions []trace.SpanStartOption
filters []Filter
spanNameFormatter func(string, *http.Request) string
clientTrace func(context.Context) *httptrace.ClientTrace
}
var _ http.RoundTripper = &Transport{}
// NewTransport wraps the provided http.RoundTripper with one that
// starts a span and injects the span context into the outbound request headers.
//
// If the provided http.RoundTripper is nil, http.DefaultTransport will be used
// as the base http.RoundTripper
func NewTransport(base http.RoundTripper, opts ...Option) *Transport {
if base == nil {
base = http.DefaultTransport
}
t := Transport{
rt: base,
}
defaultOpts := []Option{
WithSpanOptions(trace.WithSpanKind(trace.SpanKindClient)),
WithSpanNameFormatter(defaultTransportFormatter),
}
c := newConfig(append(defaultOpts, opts...)...)
t.applyConfig(c)
return &t
}
func (t *Transport) applyConfig(c *config) {
t.tracer = c.Tracer
t.propagators = c.Propagators
t.spanStartOptions = c.SpanStartOptions
t.filters = c.Filters
t.spanNameFormatter = c.SpanNameFormatter
t.clientTrace = c.ClientTrace
}
func defaultTransportFormatter(_ string, r *http.Request) string {
return "HTTP " + r.Method
}
// RoundTrip creates a Span and propagates its context via the provided request's headers
// before handing the request to the configured base RoundTripper. The created span will
// end when the response body is closed or when a read from the body returns io.EOF.
func (t *Transport) RoundTrip(r *http.Request) (*http.Response, error) {
for _, f := range t.filters {
if !f(r) {
// Simply pass through to the base RoundTripper if a filter rejects the request
return t.rt.RoundTrip(r)
}
}
tracer := t.tracer
if tracer == nil {
if span := trace.SpanFromContext(r.Context()); span.SpanContext().IsValid() {
tracer = newTracer(span.TracerProvider())
} else {
tracer = newTracer(otel.GetTracerProvider())
}
}
opts := append([]trace.SpanStartOption{}, t.spanStartOptions...) // start with the configured options
ctx, span := tracer.Start(r.Context(), t.spanNameFormatter("", r), opts...)
if t.clientTrace != nil {
ctx = httptrace.WithClientTrace(ctx, t.clientTrace(ctx))
}
r = r.WithContext(ctx)
span.SetAttributes(semconv.HTTPClientAttributesFromHTTPRequest(r)...)
t.propagators.Inject(ctx, propagation.HeaderCarrier(r.Header))
res, err := t.rt.RoundTrip(r)
if err != nil {
span.RecordError(err)
span.End()
return res, err
}
span.SetAttributes(semconv.HTTPAttributesFromHTTPStatusCode(res.StatusCode)...)
span.SetStatus(semconv.SpanStatusFromHTTPStatusCode(res.StatusCode))
res.Body = &wrappedBody{ctx: ctx, span: span, body: res.Body}
return res, err
}
type wrappedBody struct {
ctx context.Context
span trace.Span
body io.ReadCloser
}
var _ io.ReadCloser = &wrappedBody{}
func (wb *wrappedBody) Read(b []byte) (int, error) {
n, err := wb.body.Read(b)
switch err {
case nil:
// nothing to do here but fall through to the return
case io.EOF:
wb.span.End()
default:
wb.span.RecordError(err)
}
return n, err
}
func (wb *wrappedBody) Close() error {
wb.span.End()
return wb.body.Close()
}

96
vendor/go.opentelemetry.io/contrib/instrumentation/net/http/otelhttp/wrap.go generated vendored Normal file
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// Copyright The OpenTelemetry Authors
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package otelhttp
import (
"context"
"io"
"net/http"
"go.opentelemetry.io/otel/propagation"
)
var _ io.ReadCloser = &bodyWrapper{}
// bodyWrapper wraps a http.Request.Body (an io.ReadCloser) to track the number
// of bytes read and the last error
type bodyWrapper struct {
io.ReadCloser
record func(n int64) // must not be nil
read int64
err error
}
func (w *bodyWrapper) Read(b []byte) (int, error) {
n, err := w.ReadCloser.Read(b)
n1 := int64(n)
w.read += n1
w.err = err
w.record(n1)
return n, err
}
func (w *bodyWrapper) Close() error {
return w.ReadCloser.Close()
}
var _ http.ResponseWriter = &respWriterWrapper{}
// respWriterWrapper wraps a http.ResponseWriter in order to track the number of
// bytes written, the last error, and to catch the returned statusCode
// TODO: The wrapped http.ResponseWriter doesn't implement any of the optional
// types (http.Hijacker, http.Pusher, http.CloseNotifier, http.Flusher, etc)
// that may be useful when using it in real life situations.
type respWriterWrapper struct {
http.ResponseWriter
record func(n int64) // must not be nil
// used to inject the header
ctx context.Context
props propagation.TextMapPropagator
written int64
statusCode int
err error
wroteHeader bool
}
func (w *respWriterWrapper) Header() http.Header {
return w.ResponseWriter.Header()
}
func (w *respWriterWrapper) Write(p []byte) (int, error) {
if !w.wroteHeader {
w.WriteHeader(http.StatusOK)
}
n, err := w.ResponseWriter.Write(p)
n1 := int64(n)
w.record(n1)
w.written += n1
w.err = err
return n, err
}
func (w *respWriterWrapper) WriteHeader(statusCode int) {
if w.wroteHeader {
return
}
w.wroteHeader = true
w.statusCode = statusCode
w.props.Inject(w.ctx, propagation.HeaderCarrier(w.Header()))
w.ResponseWriter.WriteHeader(statusCode)
}

201
vendor/go.opentelemetry.io/otel/internal/metric/LICENSE generated vendored Normal file
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Apache License
Version 2.0, January 2004
http://www.apache.org/licenses/
TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION
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"License" shall mean the terms and conditions for use, reproduction,
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otherwise, or (ii) ownership of fifty percent (50%) or more of the
outstanding shares, or (iii) beneficial ownership of such entity.
"You" (or "Your") shall mean an individual or Legal Entity
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"Work" shall mean the work of authorship, whether in Source or
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form, that is based on (or derived from) the Work and for which the
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5. Submission of Contributions. Unless You explicitly state otherwise,
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the terms of any separate license agreement you may have executed
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6. Trademarks. This License does not grant permission to use the trade
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whether in tort (including negligence), contract, or otherwise,
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on Your own behalf and on Your sole responsibility, not on behalf
of any other Contributor, and only if You agree to indemnify,
defend, and hold each Contributor harmless for any liability
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of your accepting any such warranty or additional liability.
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APPENDIX: How to apply the Apache License to your work.
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you may not use this file except in compliance with the License.
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Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.

348
vendor/go.opentelemetry.io/otel/internal/metric/global/meter.go generated vendored Normal file
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// Copyright The OpenTelemetry Authors
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package global
import (
"context"
"sync"
"sync/atomic"
"unsafe"
"go.opentelemetry.io/otel/attribute"
"go.opentelemetry.io/otel/metric"
"go.opentelemetry.io/otel/metric/number"
"go.opentelemetry.io/otel/metric/registry"
)
// This file contains the forwarding implementation of MeterProvider used as
// the default global instance. Metric events using instruments provided by
// this implementation are no-ops until the first Meter implementation is set
// as the global provider.
//
// The implementation here uses Mutexes to maintain a list of active Meters in
// the MeterProvider and Instruments in each Meter, under the assumption that
// these interfaces are not performance-critical.
//
// We have the invariant that setDelegate() will be called before a new
// MeterProvider implementation is registered as the global provider. Mutexes
// in the MeterProvider and Meters ensure that each instrument has a delegate
// before the global provider is set.
//
// Bound instrument operations are implemented by delegating to the
// instrument after it is registered, with a sync.Once initializer to
// protect against races with Release().
//
// Metric uniqueness checking is implemented by calling the exported
// methods of the api/metric/registry package.
type meterKey struct {
Name, Version string
}
type meterProvider struct {
delegate metric.MeterProvider
// lock protects `delegate` and `meters`.
lock sync.Mutex
// meters maintains a unique entry for every named Meter
// that has been registered through the global instance.
meters map[meterKey]*meterEntry
}
type meterImpl struct {
delegate unsafe.Pointer // (*metric.MeterImpl)
lock sync.Mutex
syncInsts []*syncImpl
asyncInsts []*asyncImpl
}
type meterEntry struct {
unique metric.MeterImpl
impl meterImpl
}
type instrument struct {
descriptor metric.Descriptor
}
type syncImpl struct {
delegate unsafe.Pointer // (*metric.SyncImpl)
instrument
}
type asyncImpl struct {
delegate unsafe.Pointer // (*metric.AsyncImpl)
instrument
runner metric.AsyncRunner
}
// SyncImpler is implemented by all of the sync metric
// instruments.
type SyncImpler interface {
SyncImpl() metric.SyncImpl
}
// AsyncImpler is implemented by all of the async
// metric instruments.
type AsyncImpler interface {
AsyncImpl() metric.AsyncImpl
}
type syncHandle struct {
delegate unsafe.Pointer // (*metric.BoundInstrumentImpl)
inst *syncImpl
labels []attribute.KeyValue
initialize sync.Once
}
var _ metric.MeterProvider = &meterProvider{}
var _ metric.MeterImpl = &meterImpl{}
var _ metric.InstrumentImpl = &syncImpl{}
var _ metric.BoundSyncImpl = &syncHandle{}
var _ metric.AsyncImpl = &asyncImpl{}
func (inst *instrument) Descriptor() metric.Descriptor {
return inst.descriptor
}
// MeterProvider interface and delegation
func newMeterProvider() *meterProvider {
return &meterProvider{
meters: map[meterKey]*meterEntry{},
}
}
func (p *meterProvider) setDelegate(provider metric.MeterProvider) {
p.lock.Lock()
defer p.lock.Unlock()
p.delegate = provider
for key, entry := range p.meters {
entry.impl.setDelegate(key.Name, key.Version, provider)
}
p.meters = nil
}
func (p *meterProvider) Meter(instrumentationName string, opts ...metric.MeterOption) metric.Meter {
p.lock.Lock()
defer p.lock.Unlock()
if p.delegate != nil {
return p.delegate.Meter(instrumentationName, opts...)
}
key := meterKey{
Name: instrumentationName,
Version: metric.NewMeterConfig(opts...).InstrumentationVersion(),
}
entry, ok := p.meters[key]
if !ok {
entry = &meterEntry{}
entry.unique = registry.NewUniqueInstrumentMeterImpl(&entry.impl)
p.meters[key] = entry
}
return metric.WrapMeterImpl(entry.unique, key.Name, metric.WithInstrumentationVersion(key.Version))
}
// Meter interface and delegation
func (m *meterImpl) setDelegate(name, version string, provider metric.MeterProvider) {
m.lock.Lock()
defer m.lock.Unlock()
d := new(metric.MeterImpl)
*d = provider.Meter(name, metric.WithInstrumentationVersion(version)).MeterImpl()
m.delegate = unsafe.Pointer(d)
for _, inst := range m.syncInsts {
inst.setDelegate(*d)
}
m.syncInsts = nil
for _, obs := range m.asyncInsts {
obs.setDelegate(*d)
}
m.asyncInsts = nil
}
func (m *meterImpl) NewSyncInstrument(desc metric.Descriptor) (metric.SyncImpl, error) {
m.lock.Lock()
defer m.lock.Unlock()
if meterPtr := (*metric.MeterImpl)(atomic.LoadPointer(&m.delegate)); meterPtr != nil {
return (*meterPtr).NewSyncInstrument(desc)
}
inst := &syncImpl{
instrument: instrument{
descriptor: desc,
},
}
m.syncInsts = append(m.syncInsts, inst)
return inst, nil
}
// Synchronous delegation
func (inst *syncImpl) setDelegate(d metric.MeterImpl) {
implPtr := new(metric.SyncImpl)
var err error
*implPtr, err = d.NewSyncInstrument(inst.descriptor)
if err != nil {
// TODO: There is no standard way to deliver this error to the user.
// See https://github.com/open-telemetry/opentelemetry-go/issues/514
// Note that the default SDK will not generate any errors yet, this is
// only for added safety.
panic(err)
}
atomic.StorePointer(&inst.delegate, unsafe.Pointer(implPtr))
}
func (inst *syncImpl) Implementation() interface{} {
if implPtr := (*metric.SyncImpl)(atomic.LoadPointer(&inst.delegate)); implPtr != nil {
return (*implPtr).Implementation()
}
return inst
}
func (inst *syncImpl) Bind(labels []attribute.KeyValue) metric.BoundSyncImpl {
if implPtr := (*metric.SyncImpl)(atomic.LoadPointer(&inst.delegate)); implPtr != nil {
return (*implPtr).Bind(labels)
}
return &syncHandle{
inst: inst,
labels: labels,
}
}
func (bound *syncHandle) Unbind() {
bound.initialize.Do(func() {})
implPtr := (*metric.BoundSyncImpl)(atomic.LoadPointer(&bound.delegate))
if implPtr == nil {
return
}
(*implPtr).Unbind()
}
// Async delegation
func (m *meterImpl) NewAsyncInstrument(
desc metric.Descriptor,
runner metric.AsyncRunner,
) (metric.AsyncImpl, error) {
m.lock.Lock()
defer m.lock.Unlock()
if meterPtr := (*metric.MeterImpl)(atomic.LoadPointer(&m.delegate)); meterPtr != nil {
return (*meterPtr).NewAsyncInstrument(desc, runner)
}
inst := &asyncImpl{
instrument: instrument{
descriptor: desc,
},
runner: runner,
}
m.asyncInsts = append(m.asyncInsts, inst)
return inst, nil
}
func (obs *asyncImpl) Implementation() interface{} {
if implPtr := (*metric.AsyncImpl)(atomic.LoadPointer(&obs.delegate)); implPtr != nil {
return (*implPtr).Implementation()
}
return obs
}
func (obs *asyncImpl) setDelegate(d metric.MeterImpl) {
implPtr := new(metric.AsyncImpl)
var err error
*implPtr, err = d.NewAsyncInstrument(obs.descriptor, obs.runner)
if err != nil {
// TODO: There is no standard way to deliver this error to the user.
// See https://github.com/open-telemetry/opentelemetry-go/issues/514
// Note that the default SDK will not generate any errors yet, this is
// only for added safety.
panic(err)
}
atomic.StorePointer(&obs.delegate, unsafe.Pointer(implPtr))
}
// Metric updates
func (m *meterImpl) RecordBatch(ctx context.Context, labels []attribute.KeyValue, measurements ...metric.Measurement) {
if delegatePtr := (*metric.MeterImpl)(atomic.LoadPointer(&m.delegate)); delegatePtr != nil {
(*delegatePtr).RecordBatch(ctx, labels, measurements...)
}
}
func (inst *syncImpl) RecordOne(ctx context.Context, number number.Number, labels []attribute.KeyValue) {
if instPtr := (*metric.SyncImpl)(atomic.LoadPointer(&inst.delegate)); instPtr != nil {
(*instPtr).RecordOne(ctx, number, labels)
}
}
// Bound instrument initialization
func (bound *syncHandle) RecordOne(ctx context.Context, number number.Number) {
instPtr := (*metric.SyncImpl)(atomic.LoadPointer(&bound.inst.delegate))
if instPtr == nil {
return
}
var implPtr *metric.BoundSyncImpl
bound.initialize.Do(func() {
implPtr = new(metric.BoundSyncImpl)
*implPtr = (*instPtr).Bind(bound.labels)
atomic.StorePointer(&bound.delegate, unsafe.Pointer(implPtr))
})
if implPtr == nil {
implPtr = (*metric.BoundSyncImpl)(atomic.LoadPointer(&bound.delegate))
}
// This may still be nil if instrument was created and bound
// without a delegate, then the instrument was set to have a
// delegate and unbound.
if implPtr == nil {
return
}
(*implPtr).RecordOne(ctx, number)
}
func AtomicFieldOffsets() map[string]uintptr {
return map[string]uintptr{
"meterProvider.delegate": unsafe.Offsetof(meterProvider{}.delegate),
"meterImpl.delegate": unsafe.Offsetof(meterImpl{}.delegate),
"syncImpl.delegate": unsafe.Offsetof(syncImpl{}.delegate),
"asyncImpl.delegate": unsafe.Offsetof(asyncImpl{}.delegate),
"syncHandle.delegate": unsafe.Offsetof(syncHandle{}.delegate),
}
}

66
vendor/go.opentelemetry.io/otel/internal/metric/global/metric.go generated vendored Normal file
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// Copyright The OpenTelemetry Authors
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package global
import (
"sync"
"sync/atomic"
"go.opentelemetry.io/otel/metric"
)
type meterProviderHolder struct {
mp metric.MeterProvider
}
var (
globalMeter = defaultMeterValue()
delegateMeterOnce sync.Once
)
// MeterProvider is the internal implementation for global.MeterProvider.
func MeterProvider() metric.MeterProvider {
return globalMeter.Load().(meterProviderHolder).mp
}
// SetMeterProvider is the internal implementation for global.SetMeterProvider.
func SetMeterProvider(mp metric.MeterProvider) {
delegateMeterOnce.Do(func() {
current := MeterProvider()
if current == mp {
// Setting the provider to the prior default is nonsense, panic.
// Panic is acceptable because we are likely still early in the
// process lifetime.
panic("invalid MeterProvider, the global instance cannot be reinstalled")
} else if def, ok := current.(*meterProvider); ok {
def.setDelegate(mp)
}
})
globalMeter.Store(meterProviderHolder{mp: mp})
}
func defaultMeterValue() *atomic.Value {
v := &atomic.Value{}
v.Store(meterProviderHolder{mp: newMeterProvider()})
return v
}
// ResetForTest restores the initial global state, for testing purposes.
func ResetForTest() {
globalMeter = defaultMeterValue()
delegateMeterOnce = sync.Once{}
}

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Apache License
Version 2.0, January 2004
http://www.apache.org/licenses/
TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION
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on Your own behalf and on Your sole responsibility, not on behalf
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APPENDIX: How to apply the Apache License to your work.
To apply the Apache License to your work, attach the following
boilerplate notice, with the fields enclosed by brackets "[]"
replaced with your own identifying information. (Don't include
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Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
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Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.

141
vendor/go.opentelemetry.io/otel/metric/config.go generated vendored Normal file
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// Copyright The OpenTelemetry Authors
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package metric // import "go.opentelemetry.io/otel/metric"
import (
"go.opentelemetry.io/otel/metric/unit"
)
// InstrumentConfig contains options for metric instrument descriptors.
type InstrumentConfig struct {
description string
unit unit.Unit
instrumentationName string
instrumentationVersion string
}
// Description describes the instrument in human-readable terms.
func (cfg InstrumentConfig) Description() string {
return cfg.description
}
// Unit describes the measurement unit for a instrument.
func (cfg InstrumentConfig) Unit() unit.Unit {
return cfg.unit
}
// InstrumentationName is the name of the library providing
// instrumentation.
func (cfg InstrumentConfig) InstrumentationName() string {
return cfg.instrumentationName
}
// InstrumentationVersion is the version of the library providing
// instrumentation.
func (cfg InstrumentConfig) InstrumentationVersion() string {
return cfg.instrumentationVersion
}
// InstrumentOption is an interface for applying metric instrument options.
type InstrumentOption interface {
// ApplyMeter is used to set a InstrumentOption value of a
// InstrumentConfig.
applyInstrument(*InstrumentConfig)
}
// NewInstrumentConfig creates a new InstrumentConfig
// and applies all the given options.
func NewInstrumentConfig(opts ...InstrumentOption) InstrumentConfig {
var config InstrumentConfig
for _, o := range opts {
o.applyInstrument(&config)
}
return config
}
type instrumentOptionFunc func(*InstrumentConfig)
func (fn instrumentOptionFunc) applyInstrument(cfg *InstrumentConfig) {
fn(cfg)
}
// WithDescription applies provided description.
func WithDescription(desc string) InstrumentOption {
return instrumentOptionFunc(func(cfg *InstrumentConfig) {
cfg.description = desc
})
}
// WithUnit applies provided unit.
func WithUnit(unit unit.Unit) InstrumentOption {
return instrumentOptionFunc(func(cfg *InstrumentConfig) {
cfg.unit = unit
})
}
// WithInstrumentationName sets the instrumentation name.
func WithInstrumentationName(name string) InstrumentOption {
return instrumentOptionFunc(func(cfg *InstrumentConfig) {
cfg.instrumentationName = name
})
}
// MeterConfig contains options for Meters.
type MeterConfig struct {
instrumentationVersion string
}
// InstrumentationVersion is the version of the library providing instrumentation.
func (cfg MeterConfig) InstrumentationVersion() string {
return cfg.instrumentationVersion
}
// MeterOption is an interface for applying Meter options.
type MeterOption interface {
// ApplyMeter is used to set a MeterOption value of a MeterConfig.
applyMeter(*MeterConfig)
}
// NewMeterConfig creates a new MeterConfig and applies
// all the given options.
func NewMeterConfig(opts ...MeterOption) MeterConfig {
var config MeterConfig
for _, o := range opts {
o.applyMeter(&config)
}
return config
}
// InstrumentMeterOption are options that can be used as both an InstrumentOption
// and MeterOption
type InstrumentMeterOption interface {
InstrumentOption
MeterOption
}
// WithInstrumentationVersion sets the instrumentation version.
func WithInstrumentationVersion(version string) InstrumentMeterOption {
return instrumentationVersionOption(version)
}
type instrumentationVersionOption string
func (i instrumentationVersionOption) applyMeter(config *MeterConfig) {
config.instrumentationVersion = string(i)
}
func (i instrumentationVersionOption) applyInstrument(config *InstrumentConfig) {
config.instrumentationVersion = string(i)
}

67
vendor/go.opentelemetry.io/otel/metric/doc.go generated vendored Normal file
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// Copyright The OpenTelemetry Authors
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
/*
Package metric provides an implementation of the metrics part of the
OpenTelemetry API.
This package is currently in a pre-GA phase. Backwards incompatible changes
may be introduced in subsequent minor version releases as we work to track the
evolving OpenTelemetry specification and user feedback.
Measurements can be made about an operation being performed or the state of a
system in general. These measurements can be crucial to the reliable operation
of code and provide valuable insights about the inner workings of a system.
Measurements are made using instruments provided by this package. The type of
instrument used will depend on the type of measurement being made and of what
part of a system is being measured.
Instruments are categorized as Synchronous or Asynchronous and independently
as Adding or Grouping. Synchronous instruments are called by the user with a
Context. Asynchronous instruments are called by the SDK during collection.
Additive instruments are semantically intended for capturing a sum. Grouping
instruments are intended for capturing a distribution.
Additive instruments may be monotonic, in which case they are non-decreasing
and naturally define a rate.
The synchronous instrument names are:
Counter: additive, monotonic
UpDownCounter: additive
ValueRecorder: grouping
and the asynchronous instruments are:
SumObserver: additive, monotonic
UpDownSumObserver: additive
ValueObserver: grouping
All instruments are provided with support for either float64 or int64 input
values.
An instrument is created using a Meter. Additionally, a Meter is used to
record batches of synchronous measurements or asynchronous observations. A
Meter is obtained using a MeterProvider. A Meter, like a Tracer, is unique to
the instrumentation it instruments and must be named and versioned when
created with a MeterProvider with the name and version of the instrumentation
library.
Instrumentation should be designed to accept a MeterProvider from which it can
create its own unique Meter. Alternatively, the registered global
MeterProvider from the go.opentelemetry.io/otel package can be used as a
default.
*/
package metric // import "go.opentelemetry.io/otel/metric"

49
vendor/go.opentelemetry.io/otel/metric/global/metric.go generated vendored Normal file
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// Copyright The OpenTelemetry Authors
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package global // import "go.opentelemetry.io/otel/metric/global"
import (
"go.opentelemetry.io/otel/internal/metric/global"
"go.opentelemetry.io/otel/metric"
)
// Meter creates an implementation of the Meter interface from the global
// MeterProvider. The instrumentationName must be the name of the library
// providing instrumentation. This name may be the same as the instrumented
// code only if that code provides built-in instrumentation. If the
// instrumentationName is empty, then a implementation defined default name
// will be used instead.
//
// This is short for MeterProvider().Meter(name)
func Meter(instrumentationName string, opts ...metric.MeterOption) metric.Meter {
return GetMeterProvider().Meter(instrumentationName, opts...)
}
// GetMeterProvider returns the registered global meter provider. If
// none is registered then a default meter provider is returned that
// forwards the Meter interface to the first registered Meter.
//
// Use the meter provider to create a named meter. E.g.
// meter := global.MeterProvider().Meter("example.com/foo")
// or
// meter := global.Meter("example.com/foo")
func GetMeterProvider() metric.MeterProvider {
return global.MeterProvider()
}
// SetMeterProvider registers `mp` as the global meter provider.
func SetMeterProvider(mp metric.MeterProvider) {
global.SetMeterProvider(mp)
}

74
vendor/go.opentelemetry.io/otel/metric/go.mod generated vendored Normal file
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module go.opentelemetry.io/otel/metric
go 1.15
replace go.opentelemetry.io/otel => ../
replace go.opentelemetry.io/otel/bridge/opencensus => ../bridge/opencensus
replace go.opentelemetry.io/otel/bridge/opentracing => ../bridge/opentracing
replace go.opentelemetry.io/otel/example/jaeger => ../example/jaeger
replace go.opentelemetry.io/otel/example/namedtracer => ../example/namedtracer
replace go.opentelemetry.io/otel/example/opencensus => ../example/opencensus
replace go.opentelemetry.io/otel/example/otel-collector => ../example/otel-collector
replace go.opentelemetry.io/otel/example/prom-collector => ../example/prom-collector
replace go.opentelemetry.io/otel/example/prometheus => ../example/prometheus
replace go.opentelemetry.io/otel/example/zipkin => ../example/zipkin
replace go.opentelemetry.io/otel/exporters/prometheus => ../exporters/prometheus
replace go.opentelemetry.io/otel/exporters/jaeger => ../exporters/jaeger
replace go.opentelemetry.io/otel/exporters/zipkin => ../exporters/zipkin
replace go.opentelemetry.io/otel/internal/tools => ../internal/tools
replace go.opentelemetry.io/otel/metric => ./
replace go.opentelemetry.io/otel/oteltest => ../oteltest
replace go.opentelemetry.io/otel/sdk => ../sdk
replace go.opentelemetry.io/otel/sdk/export/metric => ../sdk/export/metric
replace go.opentelemetry.io/otel/sdk/metric => ../sdk/metric
replace go.opentelemetry.io/otel/trace => ../trace
require (
github.com/google/go-cmp v0.5.6
github.com/stretchr/testify v1.7.0
go.opentelemetry.io/otel v1.0.0-RC1
go.opentelemetry.io/otel/internal/metric v0.21.0
)
replace go.opentelemetry.io/otel/example/passthrough => ../example/passthrough
replace go.opentelemetry.io/otel/exporters/otlp/otlptrace => ../exporters/otlp/otlptrace
replace go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracegrpc => ../exporters/otlp/otlptrace/otlptracegrpc
replace go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracehttp => ../exporters/otlp/otlptrace/otlptracehttp
replace go.opentelemetry.io/otel/internal/metric => ../internal/metric
replace go.opentelemetry.io/otel/exporters/metric/prometheus => ../exporters/metric/prometheus
replace go.opentelemetry.io/otel/exporters/trace/jaeger => ../exporters/trace/jaeger
replace go.opentelemetry.io/otel/exporters/trace/zipkin => ../exporters/trace/zipkin
replace go.opentelemetry.io/otel/exporters/otlp/otlpmetric => ../exporters/otlp/otlpmetric
replace go.opentelemetry.io/otel/exporters/otlp/otlpmetric/otlpmetricgrpc => ../exporters/otlp/otlpmetric/otlpmetricgrpc
replace go.opentelemetry.io/otel/exporters/stdout/stdoutmetric => ../exporters/stdout/stdoutmetric
replace go.opentelemetry.io/otel/exporters/stdout/stdouttrace => ../exporters/stdout/stdouttrace

15
vendor/go.opentelemetry.io/otel/metric/go.sum generated vendored Normal file
View File

@ -0,0 +1,15 @@
github.com/davecgh/go-spew v1.1.0 h1:ZDRjVQ15GmhC3fiQ8ni8+OwkZQO4DARzQgrnXU1Liz8=
github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
github.com/google/go-cmp v0.5.6 h1:BKbKCqvP6I+rmFHt06ZmyQtvB8xAkWdhFyr0ZUNZcxQ=
github.com/google/go-cmp v0.5.6/go.mod h1:v8dTdLbMG2kIc/vJvl+f65V22dbkXbowE6jgT/gNBxE=
github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
github.com/stretchr/objx v0.1.0/go.mod h1:HFkY916IF+rwdDfMAkV7OtwuqBVzrE8GR6GFx+wExME=
github.com/stretchr/testify v1.7.0 h1:nwc3DEeHmmLAfoZucVR881uASk0Mfjw8xYJ99tb5CcY=
github.com/stretchr/testify v1.7.0/go.mod h1:6Fq8oRcR53rry900zMqJjRRixrwX3KX962/h/Wwjteg=
golang.org/x/xerrors v0.0.0-20191204190536-9bdfabe68543 h1:E7g+9GITq07hpfrRu66IVDexMakfv52eLZ2CXBWiKr4=
golang.org/x/xerrors v0.0.0-20191204190536-9bdfabe68543/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405 h1:yhCVgyC4o1eVCa2tZl7eS0r+SDo693bJlVdllGtEeKM=
gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
gopkg.in/yaml.v3 v3.0.0-20200313102051-9f266ea9e77c h1:dUUwHk2QECo/6vqA44rthZ8ie2QXMNeKRTHCNY2nXvo=
gopkg.in/yaml.v3 v3.0.0-20200313102051-9f266ea9e77c/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=

28
vendor/go.opentelemetry.io/otel/metric/instrumentkind_string.go generated vendored Normal file
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// Code generated by "stringer -type=InstrumentKind"; DO NOT EDIT.
package metric
import "strconv"
func _() {
// An "invalid array index" compiler error signifies that the constant values have changed.
// Re-run the stringer command to generate them again.
var x [1]struct{}
_ = x[ValueRecorderInstrumentKind-0]
_ = x[ValueObserverInstrumentKind-1]
_ = x[CounterInstrumentKind-2]
_ = x[UpDownCounterInstrumentKind-3]
_ = x[SumObserverInstrumentKind-4]
_ = x[UpDownSumObserverInstrumentKind-5]
}
const _InstrumentKind_name = "ValueRecorderInstrumentKindValueObserverInstrumentKindCounterInstrumentKindUpDownCounterInstrumentKindSumObserverInstrumentKindUpDownSumObserverInstrumentKind"
var _InstrumentKind_index = [...]uint8{0, 27, 54, 75, 102, 127, 158}
func (i InstrumentKind) String() string {
if i < 0 || i >= InstrumentKind(len(_InstrumentKind_index)-1) {
return "InstrumentKind(" + strconv.FormatInt(int64(i), 10) + ")"
}
return _InstrumentKind_name[_InstrumentKind_index[i]:_InstrumentKind_index[i+1]]
}

577
vendor/go.opentelemetry.io/otel/metric/metric.go generated vendored Normal file
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// Copyright The OpenTelemetry Authors
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package metric // import "go.opentelemetry.io/otel/metric"
import (
"context"
"go.opentelemetry.io/otel/attribute"
"go.opentelemetry.io/otel/metric/number"
"go.opentelemetry.io/otel/metric/unit"
)
// MeterProvider supports named Meter instances.
type MeterProvider interface {
// Meter creates an implementation of the Meter interface.
// The instrumentationName must be the name of the library providing
// instrumentation. This name may be the same as the instrumented code
// only if that code provides built-in instrumentation. If the
// instrumentationName is empty, then a implementation defined default
// name will be used instead.
Meter(instrumentationName string, opts ...MeterOption) Meter
}
// Meter is the creator of metric instruments.
//
// An uninitialized Meter is a no-op implementation.
type Meter struct {
impl MeterImpl
name, version string
}
// RecordBatch atomically records a batch of measurements.
func (m Meter) RecordBatch(ctx context.Context, ls []attribute.KeyValue, ms ...Measurement) {
if m.impl == nil {
return
}
m.impl.RecordBatch(ctx, ls, ms...)
}
// NewBatchObserver creates a new BatchObserver that supports
// making batches of observations for multiple instruments.
func (m Meter) NewBatchObserver(callback BatchObserverFunc) BatchObserver {
return BatchObserver{
meter: m,
runner: newBatchAsyncRunner(callback),
}
}
// NewInt64Counter creates a new integer Counter instrument with the
// given name, customized with options. May return an error if the
// name is invalid (e.g., empty) or improperly registered (e.g.,
// duplicate registration).
func (m Meter) NewInt64Counter(name string, options ...InstrumentOption) (Int64Counter, error) {
return wrapInt64CounterInstrument(
m.newSync(name, CounterInstrumentKind, number.Int64Kind, options))
}
// NewFloat64Counter creates a new floating point Counter with the
// given name, customized with options. May return an error if the
// name is invalid (e.g., empty) or improperly registered (e.g.,
// duplicate registration).
func (m Meter) NewFloat64Counter(name string, options ...InstrumentOption) (Float64Counter, error) {
return wrapFloat64CounterInstrument(
m.newSync(name, CounterInstrumentKind, number.Float64Kind, options))
}
// NewInt64UpDownCounter creates a new integer UpDownCounter instrument with the
// given name, customized with options. May return an error if the
// name is invalid (e.g., empty) or improperly registered (e.g.,
// duplicate registration).
func (m Meter) NewInt64UpDownCounter(name string, options ...InstrumentOption) (Int64UpDownCounter, error) {
return wrapInt64UpDownCounterInstrument(
m.newSync(name, UpDownCounterInstrumentKind, number.Int64Kind, options))
}
// NewFloat64UpDownCounter creates a new floating point UpDownCounter with the
// given name, customized with options. May return an error if the
// name is invalid (e.g., empty) or improperly registered (e.g.,
// duplicate registration).
func (m Meter) NewFloat64UpDownCounter(name string, options ...InstrumentOption) (Float64UpDownCounter, error) {
return wrapFloat64UpDownCounterInstrument(
m.newSync(name, UpDownCounterInstrumentKind, number.Float64Kind, options))
}
// NewInt64ValueRecorder creates a new integer ValueRecorder instrument with the
// given name, customized with options. May return an error if the
// name is invalid (e.g., empty) or improperly registered (e.g.,
// duplicate registration).
func (m Meter) NewInt64ValueRecorder(name string, opts ...InstrumentOption) (Int64ValueRecorder, error) {
return wrapInt64ValueRecorderInstrument(
m.newSync(name, ValueRecorderInstrumentKind, number.Int64Kind, opts))
}
// NewFloat64ValueRecorder creates a new floating point ValueRecorder with the
// given name, customized with options. May return an error if the
// name is invalid (e.g., empty) or improperly registered (e.g.,
// duplicate registration).
func (m Meter) NewFloat64ValueRecorder(name string, opts ...InstrumentOption) (Float64ValueRecorder, error) {
return wrapFloat64ValueRecorderInstrument(
m.newSync(name, ValueRecorderInstrumentKind, number.Float64Kind, opts))
}
// NewInt64ValueObserver creates a new integer ValueObserver instrument
// with the given name, running a given callback, and customized with
// options. May return an error if the name is invalid (e.g., empty)
// or improperly registered (e.g., duplicate registration).
func (m Meter) NewInt64ValueObserver(name string, callback Int64ObserverFunc, opts ...InstrumentOption) (Int64ValueObserver, error) {
if callback == nil {
return wrapInt64ValueObserverInstrument(NoopAsync{}, nil)
}
return wrapInt64ValueObserverInstrument(
m.newAsync(name, ValueObserverInstrumentKind, number.Int64Kind, opts,
newInt64AsyncRunner(callback)))
}
// NewFloat64ValueObserver creates a new floating point ValueObserver with
// the given name, running a given callback, and customized with
// options. May return an error if the name is invalid (e.g., empty)
// or improperly registered (e.g., duplicate registration).
func (m Meter) NewFloat64ValueObserver(name string, callback Float64ObserverFunc, opts ...InstrumentOption) (Float64ValueObserver, error) {
if callback == nil {
return wrapFloat64ValueObserverInstrument(NoopAsync{}, nil)
}
return wrapFloat64ValueObserverInstrument(
m.newAsync(name, ValueObserverInstrumentKind, number.Float64Kind, opts,
newFloat64AsyncRunner(callback)))
}
// NewInt64SumObserver creates a new integer SumObserver instrument
// with the given name, running a given callback, and customized with
// options. May return an error if the name is invalid (e.g., empty)
// or improperly registered (e.g., duplicate registration).
func (m Meter) NewInt64SumObserver(name string, callback Int64ObserverFunc, opts ...InstrumentOption) (Int64SumObserver, error) {
if callback == nil {
return wrapInt64SumObserverInstrument(NoopAsync{}, nil)
}
return wrapInt64SumObserverInstrument(
m.newAsync(name, SumObserverInstrumentKind, number.Int64Kind, opts,
newInt64AsyncRunner(callback)))
}
// NewFloat64SumObserver creates a new floating point SumObserver with
// the given name, running a given callback, and customized with
// options. May return an error if the name is invalid (e.g., empty)
// or improperly registered (e.g., duplicate registration).
func (m Meter) NewFloat64SumObserver(name string, callback Float64ObserverFunc, opts ...InstrumentOption) (Float64SumObserver, error) {
if callback == nil {
return wrapFloat64SumObserverInstrument(NoopAsync{}, nil)
}
return wrapFloat64SumObserverInstrument(
m.newAsync(name, SumObserverInstrumentKind, number.Float64Kind, opts,
newFloat64AsyncRunner(callback)))
}
// NewInt64UpDownSumObserver creates a new integer UpDownSumObserver instrument
// with the given name, running a given callback, and customized with
// options. May return an error if the name is invalid (e.g., empty)
// or improperly registered (e.g., duplicate registration).
func (m Meter) NewInt64UpDownSumObserver(name string, callback Int64ObserverFunc, opts ...InstrumentOption) (Int64UpDownSumObserver, error) {
if callback == nil {
return wrapInt64UpDownSumObserverInstrument(NoopAsync{}, nil)
}
return wrapInt64UpDownSumObserverInstrument(
m.newAsync(name, UpDownSumObserverInstrumentKind, number.Int64Kind, opts,
newInt64AsyncRunner(callback)))
}
// NewFloat64UpDownSumObserver creates a new floating point UpDownSumObserver with
// the given name, running a given callback, and customized with
// options. May return an error if the name is invalid (e.g., empty)
// or improperly registered (e.g., duplicate registration).
func (m Meter) NewFloat64UpDownSumObserver(name string, callback Float64ObserverFunc, opts ...InstrumentOption) (Float64UpDownSumObserver, error) {
if callback == nil {
return wrapFloat64UpDownSumObserverInstrument(NoopAsync{}, nil)
}
return wrapFloat64UpDownSumObserverInstrument(
m.newAsync(name, UpDownSumObserverInstrumentKind, number.Float64Kind, opts,
newFloat64AsyncRunner(callback)))
}
// NewInt64ValueObserver creates a new integer ValueObserver instrument
// with the given name, running in a batch callback, and customized with
// options. May return an error if the name is invalid (e.g., empty)
// or improperly registered (e.g., duplicate registration).
func (b BatchObserver) NewInt64ValueObserver(name string, opts ...InstrumentOption) (Int64ValueObserver, error) {
if b.runner == nil {
return wrapInt64ValueObserverInstrument(NoopAsync{}, nil)
}
return wrapInt64ValueObserverInstrument(
b.meter.newAsync(name, ValueObserverInstrumentKind, number.Int64Kind, opts, b.runner))
}
// NewFloat64ValueObserver creates a new floating point ValueObserver with
// the given name, running in a batch callback, and customized with
// options. May return an error if the name is invalid (e.g., empty)
// or improperly registered (e.g., duplicate registration).
func (b BatchObserver) NewFloat64ValueObserver(name string, opts ...InstrumentOption) (Float64ValueObserver, error) {
if b.runner == nil {
return wrapFloat64ValueObserverInstrument(NoopAsync{}, nil)
}
return wrapFloat64ValueObserverInstrument(
b.meter.newAsync(name, ValueObserverInstrumentKind, number.Float64Kind, opts,
b.runner))
}
// NewInt64SumObserver creates a new integer SumObserver instrument
// with the given name, running in a batch callback, and customized with
// options. May return an error if the name is invalid (e.g., empty)
// or improperly registered (e.g., duplicate registration).
func (b BatchObserver) NewInt64SumObserver(name string, opts ...InstrumentOption) (Int64SumObserver, error) {
if b.runner == nil {
return wrapInt64SumObserverInstrument(NoopAsync{}, nil)
}
return wrapInt64SumObserverInstrument(
b.meter.newAsync(name, SumObserverInstrumentKind, number.Int64Kind, opts, b.runner))
}
// NewFloat64SumObserver creates a new floating point SumObserver with
// the given name, running in a batch callback, and customized with
// options. May return an error if the name is invalid (e.g., empty)
// or improperly registered (e.g., duplicate registration).
func (b BatchObserver) NewFloat64SumObserver(name string, opts ...InstrumentOption) (Float64SumObserver, error) {
if b.runner == nil {
return wrapFloat64SumObserverInstrument(NoopAsync{}, nil)
}
return wrapFloat64SumObserverInstrument(
b.meter.newAsync(name, SumObserverInstrumentKind, number.Float64Kind, opts,
b.runner))
}
// NewInt64UpDownSumObserver creates a new integer UpDownSumObserver instrument
// with the given name, running in a batch callback, and customized with
// options. May return an error if the name is invalid (e.g., empty)
// or improperly registered (e.g., duplicate registration).
func (b BatchObserver) NewInt64UpDownSumObserver(name string, opts ...InstrumentOption) (Int64UpDownSumObserver, error) {
if b.runner == nil {
return wrapInt64UpDownSumObserverInstrument(NoopAsync{}, nil)
}
return wrapInt64UpDownSumObserverInstrument(
b.meter.newAsync(name, UpDownSumObserverInstrumentKind, number.Int64Kind, opts, b.runner))
}
// NewFloat64UpDownSumObserver creates a new floating point UpDownSumObserver with
// the given name, running in a batch callback, and customized with
// options. May return an error if the name is invalid (e.g., empty)
// or improperly registered (e.g., duplicate registration).
func (b BatchObserver) NewFloat64UpDownSumObserver(name string, opts ...InstrumentOption) (Float64UpDownSumObserver, error) {
if b.runner == nil {
return wrapFloat64UpDownSumObserverInstrument(NoopAsync{}, nil)
}
return wrapFloat64UpDownSumObserverInstrument(
b.meter.newAsync(name, UpDownSumObserverInstrumentKind, number.Float64Kind, opts,
b.runner))
}
// MeterImpl returns the underlying MeterImpl of this Meter.
func (m Meter) MeterImpl() MeterImpl {
return m.impl
}
// newAsync constructs one new asynchronous instrument.
func (m Meter) newAsync(
name string,
mkind InstrumentKind,
nkind number.Kind,
opts []InstrumentOption,
runner AsyncRunner,
) (
AsyncImpl,
error,
) {
if m.impl == nil {
return NoopAsync{}, nil
}
desc := NewDescriptor(name, mkind, nkind, opts...)
desc.config.instrumentationName = m.name
desc.config.instrumentationVersion = m.version
return m.impl.NewAsyncInstrument(desc, runner)
}
// newSync constructs one new synchronous instrument.
func (m Meter) newSync(
name string,
metricKind InstrumentKind,
numberKind number.Kind,
opts []InstrumentOption,
) (
SyncImpl,
error,
) {
if m.impl == nil {
return NoopSync{}, nil
}
desc := NewDescriptor(name, metricKind, numberKind, opts...)
desc.config.instrumentationName = m.name
desc.config.instrumentationVersion = m.version
return m.impl.NewSyncInstrument(desc)
}
// MeterMust is a wrapper for Meter interfaces that panics when any
// instrument constructor encounters an error.
type MeterMust struct {
meter Meter
}
// BatchObserverMust is a wrapper for BatchObserver that panics when
// any instrument constructor encounters an error.
type BatchObserverMust struct {
batch BatchObserver
}
// Must constructs a MeterMust implementation from a Meter, allowing
// the application to panic when any instrument constructor yields an
// error.
func Must(meter Meter) MeterMust {
return MeterMust{meter: meter}
}
// NewInt64Counter calls `Meter.NewInt64Counter` and returns the
// instrument, panicking if it encounters an error.
func (mm MeterMust) NewInt64Counter(name string, cos ...InstrumentOption) Int64Counter {
if inst, err := mm.meter.NewInt64Counter(name, cos...); err != nil {
panic(err)
} else {
return inst
}
}
// NewFloat64Counter calls `Meter.NewFloat64Counter` and returns the
// instrument, panicking if it encounters an error.
func (mm MeterMust) NewFloat64Counter(name string, cos ...InstrumentOption) Float64Counter {
if inst, err := mm.meter.NewFloat64Counter(name, cos...); err != nil {
panic(err)
} else {
return inst
}
}
// NewInt64UpDownCounter calls `Meter.NewInt64UpDownCounter` and returns the
// instrument, panicking if it encounters an error.
func (mm MeterMust) NewInt64UpDownCounter(name string, cos ...InstrumentOption) Int64UpDownCounter {
if inst, err := mm.meter.NewInt64UpDownCounter(name, cos...); err != nil {
panic(err)
} else {
return inst
}
}
// NewFloat64UpDownCounter calls `Meter.NewFloat64UpDownCounter` and returns the
// instrument, panicking if it encounters an error.
func (mm MeterMust) NewFloat64UpDownCounter(name string, cos ...InstrumentOption) Float64UpDownCounter {
if inst, err := mm.meter.NewFloat64UpDownCounter(name, cos...); err != nil {
panic(err)
} else {
return inst
}
}
// NewInt64ValueRecorder calls `Meter.NewInt64ValueRecorder` and returns the
// instrument, panicking if it encounters an error.
func (mm MeterMust) NewInt64ValueRecorder(name string, mos ...InstrumentOption) Int64ValueRecorder {
if inst, err := mm.meter.NewInt64ValueRecorder(name, mos...); err != nil {
panic(err)
} else {
return inst
}
}
// NewFloat64ValueRecorder calls `Meter.NewFloat64ValueRecorder` and returns the
// instrument, panicking if it encounters an error.
func (mm MeterMust) NewFloat64ValueRecorder(name string, mos ...InstrumentOption) Float64ValueRecorder {
if inst, err := mm.meter.NewFloat64ValueRecorder(name, mos...); err != nil {
panic(err)
} else {
return inst
}
}
// NewInt64ValueObserver calls `Meter.NewInt64ValueObserver` and
// returns the instrument, panicking if it encounters an error.
func (mm MeterMust) NewInt64ValueObserver(name string, callback Int64ObserverFunc, oos ...InstrumentOption) Int64ValueObserver {
if inst, err := mm.meter.NewInt64ValueObserver(name, callback, oos...); err != nil {
panic(err)
} else {
return inst
}
}
// NewFloat64ValueObserver calls `Meter.NewFloat64ValueObserver` and
// returns the instrument, panicking if it encounters an error.
func (mm MeterMust) NewFloat64ValueObserver(name string, callback Float64ObserverFunc, oos ...InstrumentOption) Float64ValueObserver {
if inst, err := mm.meter.NewFloat64ValueObserver(name, callback, oos...); err != nil {
panic(err)
} else {
return inst
}
}
// NewInt64SumObserver calls `Meter.NewInt64SumObserver` and
// returns the instrument, panicking if it encounters an error.
func (mm MeterMust) NewInt64SumObserver(name string, callback Int64ObserverFunc, oos ...InstrumentOption) Int64SumObserver {
if inst, err := mm.meter.NewInt64SumObserver(name, callback, oos...); err != nil {
panic(err)
} else {
return inst
}
}
// NewFloat64SumObserver calls `Meter.NewFloat64SumObserver` and
// returns the instrument, panicking if it encounters an error.
func (mm MeterMust) NewFloat64SumObserver(name string, callback Float64ObserverFunc, oos ...InstrumentOption) Float64SumObserver {
if inst, err := mm.meter.NewFloat64SumObserver(name, callback, oos...); err != nil {
panic(err)
} else {
return inst
}
}
// NewInt64UpDownSumObserver calls `Meter.NewInt64UpDownSumObserver` and
// returns the instrument, panicking if it encounters an error.
func (mm MeterMust) NewInt64UpDownSumObserver(name string, callback Int64ObserverFunc, oos ...InstrumentOption) Int64UpDownSumObserver {
if inst, err := mm.meter.NewInt64UpDownSumObserver(name, callback, oos...); err != nil {
panic(err)
} else {
return inst
}
}
// NewFloat64UpDownSumObserver calls `Meter.NewFloat64UpDownSumObserver` and
// returns the instrument, panicking if it encounters an error.
func (mm MeterMust) NewFloat64UpDownSumObserver(name string, callback Float64ObserverFunc, oos ...InstrumentOption) Float64UpDownSumObserver {
if inst, err := mm.meter.NewFloat64UpDownSumObserver(name, callback, oos...); err != nil {
panic(err)
} else {
return inst
}
}
// NewBatchObserver returns a wrapper around BatchObserver that panics
// when any instrument constructor returns an error.
func (mm MeterMust) NewBatchObserver(callback BatchObserverFunc) BatchObserverMust {
return BatchObserverMust{
batch: mm.meter.NewBatchObserver(callback),
}
}
// NewInt64ValueObserver calls `BatchObserver.NewInt64ValueObserver` and
// returns the instrument, panicking if it encounters an error.
func (bm BatchObserverMust) NewInt64ValueObserver(name string, oos ...InstrumentOption) Int64ValueObserver {
if inst, err := bm.batch.NewInt64ValueObserver(name, oos...); err != nil {
panic(err)
} else {
return inst
}
}
// NewFloat64ValueObserver calls `BatchObserver.NewFloat64ValueObserver` and
// returns the instrument, panicking if it encounters an error.
func (bm BatchObserverMust) NewFloat64ValueObserver(name string, oos ...InstrumentOption) Float64ValueObserver {
if inst, err := bm.batch.NewFloat64ValueObserver(name, oos...); err != nil {
panic(err)
} else {
return inst
}
}
// NewInt64SumObserver calls `BatchObserver.NewInt64SumObserver` and
// returns the instrument, panicking if it encounters an error.
func (bm BatchObserverMust) NewInt64SumObserver(name string, oos ...InstrumentOption) Int64SumObserver {
if inst, err := bm.batch.NewInt64SumObserver(name, oos...); err != nil {
panic(err)
} else {
return inst
}
}
// NewFloat64SumObserver calls `BatchObserver.NewFloat64SumObserver` and
// returns the instrument, panicking if it encounters an error.
func (bm BatchObserverMust) NewFloat64SumObserver(name string, oos ...InstrumentOption) Float64SumObserver {
if inst, err := bm.batch.NewFloat64SumObserver(name, oos...); err != nil {
panic(err)
} else {
return inst
}
}
// NewInt64UpDownSumObserver calls `BatchObserver.NewInt64UpDownSumObserver` and
// returns the instrument, panicking if it encounters an error.
func (bm BatchObserverMust) NewInt64UpDownSumObserver(name string, oos ...InstrumentOption) Int64UpDownSumObserver {
if inst, err := bm.batch.NewInt64UpDownSumObserver(name, oos...); err != nil {
panic(err)
} else {
return inst
}
}
// NewFloat64UpDownSumObserver calls `BatchObserver.NewFloat64UpDownSumObserver` and
// returns the instrument, panicking if it encounters an error.
func (bm BatchObserverMust) NewFloat64UpDownSumObserver(name string, oos ...InstrumentOption) Float64UpDownSumObserver {
if inst, err := bm.batch.NewFloat64UpDownSumObserver(name, oos...); err != nil {
panic(err)
} else {
return inst
}
}
// Descriptor contains all the settings that describe an instrument,
// including its name, metric kind, number kind, and the configurable
// options.
type Descriptor struct {
name string
instrumentKind InstrumentKind
numberKind number.Kind
config InstrumentConfig
}
// NewDescriptor returns a Descriptor with the given contents.
func NewDescriptor(name string, ikind InstrumentKind, nkind number.Kind, opts ...InstrumentOption) Descriptor {
return Descriptor{
name: name,
instrumentKind: ikind,
numberKind: nkind,
config: NewInstrumentConfig(opts...),
}
}
// Name returns the metric instrument's name.
func (d Descriptor) Name() string {
return d.name
}
// InstrumentKind returns the specific kind of instrument.
func (d Descriptor) InstrumentKind() InstrumentKind {
return d.instrumentKind
}
// Description provides a human-readable description of the metric
// instrument.
func (d Descriptor) Description() string {
return d.config.Description()
}
// Unit describes the units of the metric instrument. Unitless
// metrics return the empty string.
func (d Descriptor) Unit() unit.Unit {
return d.config.Unit()
}
// NumberKind returns whether this instrument is declared over int64,
// float64, or uint64 values.
func (d Descriptor) NumberKind() number.Kind {
return d.numberKind
}
// InstrumentationName returns the name of the library that provided
// instrumentation for this instrument.
func (d Descriptor) InstrumentationName() string {
return d.config.InstrumentationName()
}
// InstrumentationVersion returns the version of the library that provided
// instrumentation for this instrument.
func (d Descriptor) InstrumentationVersion() string {
return d.config.InstrumentationVersion()
}

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// Copyright The OpenTelemetry Authors
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
//go:generate stringer -type=InstrumentKind
package metric // import "go.opentelemetry.io/otel/metric"
import (
"context"
"errors"
"go.opentelemetry.io/otel/attribute"
"go.opentelemetry.io/otel/metric/number"
)
// ErrSDKReturnedNilImpl is returned when a new `MeterImpl` returns nil.
var ErrSDKReturnedNilImpl = errors.New("SDK returned a nil implementation")
// InstrumentKind describes the kind of instrument.
type InstrumentKind int8
const (
// ValueRecorderInstrumentKind indicates a ValueRecorder instrument.
ValueRecorderInstrumentKind InstrumentKind = iota
// ValueObserverInstrumentKind indicates an ValueObserver instrument.
ValueObserverInstrumentKind
// CounterInstrumentKind indicates a Counter instrument.
CounterInstrumentKind
// UpDownCounterInstrumentKind indicates a UpDownCounter instrument.
UpDownCounterInstrumentKind
// SumObserverInstrumentKind indicates a SumObserver instrument.
SumObserverInstrumentKind
// UpDownSumObserverInstrumentKind indicates a UpDownSumObserver
// instrument.
UpDownSumObserverInstrumentKind
)
// Synchronous returns whether this is a synchronous kind of instrument.
func (k InstrumentKind) Synchronous() bool {
switch k {
case CounterInstrumentKind, UpDownCounterInstrumentKind, ValueRecorderInstrumentKind:
return true
}
return false
}
// Asynchronous returns whether this is an asynchronous kind of instrument.
func (k InstrumentKind) Asynchronous() bool {
return !k.Synchronous()
}
// Adding returns whether this kind of instrument adds its inputs (as opposed to Grouping).
func (k InstrumentKind) Adding() bool {
switch k {
case CounterInstrumentKind, UpDownCounterInstrumentKind, SumObserverInstrumentKind, UpDownSumObserverInstrumentKind:
return true
}
return false
}
// Grouping returns whether this kind of instrument groups its inputs (as opposed to Adding).
func (k InstrumentKind) Grouping() bool {
return !k.Adding()
}
// Monotonic returns whether this kind of instrument exposes a non-decreasing sum.
func (k InstrumentKind) Monotonic() bool {
switch k {
case CounterInstrumentKind, SumObserverInstrumentKind:
return true
}
return false
}
// PrecomputedSum returns whether this kind of instrument receives precomputed sums.
func (k InstrumentKind) PrecomputedSum() bool {
return k.Adding() && k.Asynchronous()
}
// Observation is used for reporting an asynchronous batch of metric
// values. Instances of this type should be created by asynchronous
// instruments (e.g., Int64ValueObserver.Observation()).
type Observation struct {
// number needs to be aligned for 64-bit atomic operations.
number number.Number
instrument AsyncImpl
}
// Int64ObserverFunc is a type of callback that integral
// observers run.
type Int64ObserverFunc func(context.Context, Int64ObserverResult)
// Float64ObserverFunc is a type of callback that floating point
// observers run.
type Float64ObserverFunc func(context.Context, Float64ObserverResult)
// BatchObserverFunc is a callback argument for use with any
// Observer instrument that will be reported as a batch of
// observations.
type BatchObserverFunc func(context.Context, BatchObserverResult)
// Int64ObserverResult is passed to an observer callback to capture
// observations for one asynchronous integer metric instrument.
type Int64ObserverResult struct {
instrument AsyncImpl
function func([]attribute.KeyValue, ...Observation)
}
// Float64ObserverResult is passed to an observer callback to capture
// observations for one asynchronous floating point metric instrument.
type Float64ObserverResult struct {
instrument AsyncImpl
function func([]attribute.KeyValue, ...Observation)
}
// BatchObserverResult is passed to a batch observer callback to
// capture observations for multiple asynchronous instruments.
type BatchObserverResult struct {
function func([]attribute.KeyValue, ...Observation)
}
// Observe captures a single integer value from the associated
// instrument callback, with the given labels.
func (ir Int64ObserverResult) Observe(value int64, labels ...attribute.KeyValue) {
ir.function(labels, Observation{
instrument: ir.instrument,
number: number.NewInt64Number(value),
})
}
// Observe captures a single floating point value from the associated
// instrument callback, with the given labels.
func (fr Float64ObserverResult) Observe(value float64, labels ...attribute.KeyValue) {
fr.function(labels, Observation{
instrument: fr.instrument,
number: number.NewFloat64Number(value),
})
}
// Observe captures a multiple observations from the associated batch
// instrument callback, with the given labels.
func (br BatchObserverResult) Observe(labels []attribute.KeyValue, obs ...Observation) {
br.function(labels, obs...)
}
// AsyncRunner is expected to convert into an AsyncSingleRunner or an
// AsyncBatchRunner. SDKs will encounter an error if the AsyncRunner
// does not satisfy one of these interfaces.
type AsyncRunner interface {
// AnyRunner() is a non-exported method with no functional use
// other than to make this a non-empty interface.
AnyRunner()
}
// AsyncSingleRunner is an interface implemented by single-observer
// callbacks.
type AsyncSingleRunner interface {
// Run accepts a single instrument and function for capturing
// observations of that instrument. Each call to the function
// receives one captured observation. (The function accepts
// multiple observations so the same implementation can be
// used for batch runners.)
Run(ctx context.Context, single AsyncImpl, capture func([]attribute.KeyValue, ...Observation))
AsyncRunner
}
// AsyncBatchRunner is an interface implemented by batch-observer
// callbacks.
type AsyncBatchRunner interface {
// Run accepts a function for capturing observations of
// multiple instruments.
Run(ctx context.Context, capture func([]attribute.KeyValue, ...Observation))
AsyncRunner
}
var _ AsyncSingleRunner = (*Int64ObserverFunc)(nil)
var _ AsyncSingleRunner = (*Float64ObserverFunc)(nil)
var _ AsyncBatchRunner = (*BatchObserverFunc)(nil)
// newInt64AsyncRunner returns a single-observer callback for integer Observer instruments.
func newInt64AsyncRunner(c Int64ObserverFunc) AsyncSingleRunner {
return &c
}
// newFloat64AsyncRunner returns a single-observer callback for floating point Observer instruments.
func newFloat64AsyncRunner(c Float64ObserverFunc) AsyncSingleRunner {
return &c
}
// newBatchAsyncRunner returns a batch-observer callback use with multiple Observer instruments.
func newBatchAsyncRunner(c BatchObserverFunc) AsyncBatchRunner {
return &c
}
// AnyRunner implements AsyncRunner.
func (*Int64ObserverFunc) AnyRunner() {}
// AnyRunner implements AsyncRunner.
func (*Float64ObserverFunc) AnyRunner() {}
// AnyRunner implements AsyncRunner.
func (*BatchObserverFunc) AnyRunner() {}
// Run implements AsyncSingleRunner.
func (i *Int64ObserverFunc) Run(ctx context.Context, impl AsyncImpl, function func([]attribute.KeyValue, ...Observation)) {
(*i)(ctx, Int64ObserverResult{
instrument: impl,
function: function,
})
}
// Run implements AsyncSingleRunner.
func (f *Float64ObserverFunc) Run(ctx context.Context, impl AsyncImpl, function func([]attribute.KeyValue, ...Observation)) {
(*f)(ctx, Float64ObserverResult{
instrument: impl,
function: function,
})
}
// Run implements AsyncBatchRunner.
func (b *BatchObserverFunc) Run(ctx context.Context, function func([]attribute.KeyValue, ...Observation)) {
(*b)(ctx, BatchObserverResult{
function: function,
})
}
// wrapInt64ValueObserverInstrument converts an AsyncImpl into Int64ValueObserver.
func wrapInt64ValueObserverInstrument(asyncInst AsyncImpl, err error) (Int64ValueObserver, error) {
common, err := checkNewAsync(asyncInst, err)
return Int64ValueObserver{asyncInstrument: common}, err
}
// wrapFloat64ValueObserverInstrument converts an AsyncImpl into Float64ValueObserver.
func wrapFloat64ValueObserverInstrument(asyncInst AsyncImpl, err error) (Float64ValueObserver, error) {
common, err := checkNewAsync(asyncInst, err)
return Float64ValueObserver{asyncInstrument: common}, err
}
// wrapInt64SumObserverInstrument converts an AsyncImpl into Int64SumObserver.
func wrapInt64SumObserverInstrument(asyncInst AsyncImpl, err error) (Int64SumObserver, error) {
common, err := checkNewAsync(asyncInst, err)
return Int64SumObserver{asyncInstrument: common}, err
}
// wrapFloat64SumObserverInstrument converts an AsyncImpl into Float64SumObserver.
func wrapFloat64SumObserverInstrument(asyncInst AsyncImpl, err error) (Float64SumObserver, error) {
common, err := checkNewAsync(asyncInst, err)
return Float64SumObserver{asyncInstrument: common}, err
}
// wrapInt64UpDownSumObserverInstrument converts an AsyncImpl into Int64UpDownSumObserver.
func wrapInt64UpDownSumObserverInstrument(asyncInst AsyncImpl, err error) (Int64UpDownSumObserver, error) {
common, err := checkNewAsync(asyncInst, err)
return Int64UpDownSumObserver{asyncInstrument: common}, err
}
// wrapFloat64UpDownSumObserverInstrument converts an AsyncImpl into Float64UpDownSumObserver.
func wrapFloat64UpDownSumObserverInstrument(asyncInst AsyncImpl, err error) (Float64UpDownSumObserver, error) {
common, err := checkNewAsync(asyncInst, err)
return Float64UpDownSumObserver{asyncInstrument: common}, err
}
// BatchObserver represents an Observer callback that can report
// observations for multiple instruments.
type BatchObserver struct {
meter Meter
runner AsyncBatchRunner
}
// Int64ValueObserver is a metric that captures a set of int64 values at a
// point in time.
type Int64ValueObserver struct {
asyncInstrument
}
// Float64ValueObserver is a metric that captures a set of float64 values
// at a point in time.
type Float64ValueObserver struct {
asyncInstrument
}
// Int64SumObserver is a metric that captures a precomputed sum of
// int64 values at a point in time.
type Int64SumObserver struct {
asyncInstrument
}
// Float64SumObserver is a metric that captures a precomputed sum of
// float64 values at a point in time.
type Float64SumObserver struct {
asyncInstrument
}
// Int64UpDownSumObserver is a metric that captures a precomputed sum of
// int64 values at a point in time.
type Int64UpDownSumObserver struct {
asyncInstrument
}
// Float64UpDownSumObserver is a metric that captures a precomputed sum of
// float64 values at a point in time.
type Float64UpDownSumObserver struct {
asyncInstrument
}
// Observation returns an Observation, a BatchObserverFunc
// argument, for an asynchronous integer instrument.
// This returns an implementation-level object for use by the SDK,
// users should not refer to this.
func (i Int64ValueObserver) Observation(v int64) Observation {
return Observation{
number: number.NewInt64Number(v),
instrument: i.instrument,
}
}
// Observation returns an Observation, a BatchObserverFunc
// argument, for an asynchronous integer instrument.
// This returns an implementation-level object for use by the SDK,
// users should not refer to this.
func (f Float64ValueObserver) Observation(v float64) Observation {
return Observation{
number: number.NewFloat64Number(v),
instrument: f.instrument,
}
}
// Observation returns an Observation, a BatchObserverFunc
// argument, for an asynchronous integer instrument.
// This returns an implementation-level object for use by the SDK,
// users should not refer to this.
func (i Int64SumObserver) Observation(v int64) Observation {
return Observation{
number: number.NewInt64Number(v),
instrument: i.instrument,
}
}
// Observation returns an Observation, a BatchObserverFunc
// argument, for an asynchronous integer instrument.
// This returns an implementation-level object for use by the SDK,
// users should not refer to this.
func (f Float64SumObserver) Observation(v float64) Observation {
return Observation{
number: number.NewFloat64Number(v),
instrument: f.instrument,
}
}
// Observation returns an Observation, a BatchObserverFunc
// argument, for an asynchronous integer instrument.
// This returns an implementation-level object for use by the SDK,
// users should not refer to this.
func (i Int64UpDownSumObserver) Observation(v int64) Observation {
return Observation{
number: number.NewInt64Number(v),
instrument: i.instrument,
}
}
// Observation returns an Observation, a BatchObserverFunc
// argument, for an asynchronous integer instrument.
// This returns an implementation-level object for use by the SDK,
// users should not refer to this.
func (f Float64UpDownSumObserver) Observation(v float64) Observation {
return Observation{
number: number.NewFloat64Number(v),
instrument: f.instrument,
}
}
// Measurement is used for reporting a synchronous batch of metric
// values. Instances of this type should be created by synchronous
// instruments (e.g., Int64Counter.Measurement()).
type Measurement struct {
// number needs to be aligned for 64-bit atomic operations.
number number.Number
instrument SyncImpl
}
// syncInstrument contains a SyncImpl.
type syncInstrument struct {
instrument SyncImpl
}
// syncBoundInstrument contains a BoundSyncImpl.
type syncBoundInstrument struct {
boundInstrument BoundSyncImpl
}
// asyncInstrument contains a AsyncImpl.
type asyncInstrument struct {
instrument AsyncImpl
}
// SyncImpl returns the instrument that created this measurement.
// This returns an implementation-level object for use by the SDK,
// users should not refer to this.
func (m Measurement) SyncImpl() SyncImpl {
return m.instrument
}
// Number returns a number recorded in this measurement.
func (m Measurement) Number() number.Number {
return m.number
}
// AsyncImpl returns the instrument that created this observation.
// This returns an implementation-level object for use by the SDK,
// users should not refer to this.
func (m Observation) AsyncImpl() AsyncImpl {
return m.instrument
}
// Number returns a number recorded in this observation.
func (m Observation) Number() number.Number {
return m.number
}
// AsyncImpl implements AsyncImpl.
func (a asyncInstrument) AsyncImpl() AsyncImpl {
return a.instrument
}
// SyncImpl returns the implementation object for synchronous instruments.
func (s syncInstrument) SyncImpl() SyncImpl {
return s.instrument
}
func (s syncInstrument) bind(labels []attribute.KeyValue) syncBoundInstrument {
return newSyncBoundInstrument(s.instrument.Bind(labels))
}
func (s syncInstrument) float64Measurement(value float64) Measurement {
return newMeasurement(s.instrument, number.NewFloat64Number(value))
}
func (s syncInstrument) int64Measurement(value int64) Measurement {
return newMeasurement(s.instrument, number.NewInt64Number(value))
}
func (s syncInstrument) directRecord(ctx context.Context, number number.Number, labels []attribute.KeyValue) {
s.instrument.RecordOne(ctx, number, labels)
}
func (h syncBoundInstrument) directRecord(ctx context.Context, number number.Number) {
h.boundInstrument.RecordOne(ctx, number)
}
// Unbind calls SyncImpl.Unbind.
func (h syncBoundInstrument) Unbind() {
h.boundInstrument.Unbind()
}
// checkNewAsync receives an AsyncImpl and potential
// error, and returns the same types, checking for and ensuring that
// the returned interface is not nil.
func checkNewAsync(instrument AsyncImpl, err error) (asyncInstrument, error) {
if instrument == nil {
if err == nil {
err = ErrSDKReturnedNilImpl
}
instrument = NoopAsync{}
}
return asyncInstrument{
instrument: instrument,
}, err
}
// checkNewSync receives an SyncImpl and potential
// error, and returns the same types, checking for and ensuring that
// the returned interface is not nil.
func checkNewSync(instrument SyncImpl, err error) (syncInstrument, error) {
if instrument == nil {
if err == nil {
err = ErrSDKReturnedNilImpl
}
// Note: an alternate behavior would be to synthesize a new name
// or group all duplicately-named instruments of a certain type
// together and use a tag for the original name, e.g.,
// name = 'invalid.counter.int64'
// label = 'original-name=duplicate-counter-name'
instrument = NoopSync{}
}
return syncInstrument{
instrument: instrument,
}, err
}
func newSyncBoundInstrument(boundInstrument BoundSyncImpl) syncBoundInstrument {
return syncBoundInstrument{
boundInstrument: boundInstrument,
}
}
func newMeasurement(instrument SyncImpl, number number.Number) Measurement {
return Measurement{
instrument: instrument,
number: number,
}
}
// wrapInt64CounterInstrument converts a SyncImpl into Int64Counter.
func wrapInt64CounterInstrument(syncInst SyncImpl, err error) (Int64Counter, error) {
common, err := checkNewSync(syncInst, err)
return Int64Counter{syncInstrument: common}, err
}
// wrapFloat64CounterInstrument converts a SyncImpl into Float64Counter.
func wrapFloat64CounterInstrument(syncInst SyncImpl, err error) (Float64Counter, error) {
common, err := checkNewSync(syncInst, err)
return Float64Counter{syncInstrument: common}, err
}
// wrapInt64UpDownCounterInstrument converts a SyncImpl into Int64UpDownCounter.
func wrapInt64UpDownCounterInstrument(syncInst SyncImpl, err error) (Int64UpDownCounter, error) {
common, err := checkNewSync(syncInst, err)
return Int64UpDownCounter{syncInstrument: common}, err
}
// wrapFloat64UpDownCounterInstrument converts a SyncImpl into Float64UpDownCounter.
func wrapFloat64UpDownCounterInstrument(syncInst SyncImpl, err error) (Float64UpDownCounter, error) {
common, err := checkNewSync(syncInst, err)
return Float64UpDownCounter{syncInstrument: common}, err
}
// wrapInt64ValueRecorderInstrument converts a SyncImpl into Int64ValueRecorder.
func wrapInt64ValueRecorderInstrument(syncInst SyncImpl, err error) (Int64ValueRecorder, error) {
common, err := checkNewSync(syncInst, err)
return Int64ValueRecorder{syncInstrument: common}, err
}
// wrapFloat64ValueRecorderInstrument converts a SyncImpl into Float64ValueRecorder.
func wrapFloat64ValueRecorderInstrument(syncInst SyncImpl, err error) (Float64ValueRecorder, error) {
common, err := checkNewSync(syncInst, err)
return Float64ValueRecorder{syncInstrument: common}, err
}
// Float64Counter is a metric that accumulates float64 values.
type Float64Counter struct {
syncInstrument
}
// Int64Counter is a metric that accumulates int64 values.
type Int64Counter struct {
syncInstrument
}
// BoundFloat64Counter is a bound instrument for Float64Counter.
//
// It inherits the Unbind function from syncBoundInstrument.
type BoundFloat64Counter struct {
syncBoundInstrument
}
// BoundInt64Counter is a boundInstrument for Int64Counter.
//
// It inherits the Unbind function from syncBoundInstrument.
type BoundInt64Counter struct {
syncBoundInstrument
}
// Bind creates a bound instrument for this counter. The labels are
// associated with values recorded via subsequent calls to Record.
func (c Float64Counter) Bind(labels ...attribute.KeyValue) (h BoundFloat64Counter) {
h.syncBoundInstrument = c.bind(labels)
return
}
// Bind creates a bound instrument for this counter. The labels are
// associated with values recorded via subsequent calls to Record.
func (c Int64Counter) Bind(labels ...attribute.KeyValue) (h BoundInt64Counter) {
h.syncBoundInstrument = c.bind(labels)
return
}
// Measurement creates a Measurement object to use with batch
// recording.
func (c Float64Counter) Measurement(value float64) Measurement {
return c.float64Measurement(value)
}
// Measurement creates a Measurement object to use with batch
// recording.
func (c Int64Counter) Measurement(value int64) Measurement {
return c.int64Measurement(value)
}
// Add adds the value to the counter's sum. The labels should contain
// the keys and values to be associated with this value.
func (c Float64Counter) Add(ctx context.Context, value float64, labels ...attribute.KeyValue) {
c.directRecord(ctx, number.NewFloat64Number(value), labels)
}
// Add adds the value to the counter's sum. The labels should contain
// the keys and values to be associated with this value.
func (c Int64Counter) Add(ctx context.Context, value int64, labels ...attribute.KeyValue) {
c.directRecord(ctx, number.NewInt64Number(value), labels)
}
// Add adds the value to the counter's sum using the labels
// previously bound to this counter via Bind()
func (b BoundFloat64Counter) Add(ctx context.Context, value float64) {
b.directRecord(ctx, number.NewFloat64Number(value))
}
// Add adds the value to the counter's sum using the labels
// previously bound to this counter via Bind()
func (b BoundInt64Counter) Add(ctx context.Context, value int64) {
b.directRecord(ctx, number.NewInt64Number(value))
}
// Float64UpDownCounter is a metric instrument that sums floating
// point values.
type Float64UpDownCounter struct {
syncInstrument
}
// Int64UpDownCounter is a metric instrument that sums integer values.
type Int64UpDownCounter struct {
syncInstrument
}
// BoundFloat64UpDownCounter is a bound instrument for Float64UpDownCounter.
//
// It inherits the Unbind function from syncBoundInstrument.
type BoundFloat64UpDownCounter struct {
syncBoundInstrument
}
// BoundInt64UpDownCounter is a boundInstrument for Int64UpDownCounter.
//
// It inherits the Unbind function from syncBoundInstrument.
type BoundInt64UpDownCounter struct {
syncBoundInstrument
}
// Bind creates a bound instrument for this counter. The labels are
// associated with values recorded via subsequent calls to Record.
func (c Float64UpDownCounter) Bind(labels ...attribute.KeyValue) (h BoundFloat64UpDownCounter) {
h.syncBoundInstrument = c.bind(labels)
return
}
// Bind creates a bound instrument for this counter. The labels are
// associated with values recorded via subsequent calls to Record.
func (c Int64UpDownCounter) Bind(labels ...attribute.KeyValue) (h BoundInt64UpDownCounter) {
h.syncBoundInstrument = c.bind(labels)
return
}
// Measurement creates a Measurement object to use with batch
// recording.
func (c Float64UpDownCounter) Measurement(value float64) Measurement {
return c.float64Measurement(value)
}
// Measurement creates a Measurement object to use with batch
// recording.
func (c Int64UpDownCounter) Measurement(value int64) Measurement {
return c.int64Measurement(value)
}
// Add adds the value to the counter's sum. The labels should contain
// the keys and values to be associated with this value.
func (c Float64UpDownCounter) Add(ctx context.Context, value float64, labels ...attribute.KeyValue) {
c.directRecord(ctx, number.NewFloat64Number(value), labels)
}
// Add adds the value to the counter's sum. The labels should contain
// the keys and values to be associated with this value.
func (c Int64UpDownCounter) Add(ctx context.Context, value int64, labels ...attribute.KeyValue) {
c.directRecord(ctx, number.NewInt64Number(value), labels)
}
// Add adds the value to the counter's sum using the labels
// previously bound to this counter via Bind()
func (b BoundFloat64UpDownCounter) Add(ctx context.Context, value float64) {
b.directRecord(ctx, number.NewFloat64Number(value))
}
// Add adds the value to the counter's sum using the labels
// previously bound to this counter via Bind()
func (b BoundInt64UpDownCounter) Add(ctx context.Context, value int64) {
b.directRecord(ctx, number.NewInt64Number(value))
}
// Float64ValueRecorder is a metric that records float64 values.
type Float64ValueRecorder struct {
syncInstrument
}
// Int64ValueRecorder is a metric that records int64 values.
type Int64ValueRecorder struct {
syncInstrument
}
// BoundFloat64ValueRecorder is a bound instrument for Float64ValueRecorder.
//
// It inherits the Unbind function from syncBoundInstrument.
type BoundFloat64ValueRecorder struct {
syncBoundInstrument
}
// BoundInt64ValueRecorder is a bound instrument for Int64ValueRecorder.
//
// It inherits the Unbind function from syncBoundInstrument.
type BoundInt64ValueRecorder struct {
syncBoundInstrument
}
// Bind creates a bound instrument for this ValueRecorder. The labels are
// associated with values recorded via subsequent calls to Record.
func (c Float64ValueRecorder) Bind(labels ...attribute.KeyValue) (h BoundFloat64ValueRecorder) {
h.syncBoundInstrument = c.bind(labels)
return
}
// Bind creates a bound instrument for this ValueRecorder. The labels are
// associated with values recorded via subsequent calls to Record.
func (c Int64ValueRecorder) Bind(labels ...attribute.KeyValue) (h BoundInt64ValueRecorder) {
h.syncBoundInstrument = c.bind(labels)
return
}
// Measurement creates a Measurement object to use with batch
// recording.
func (c Float64ValueRecorder) Measurement(value float64) Measurement {
return c.float64Measurement(value)
}
// Measurement creates a Measurement object to use with batch
// recording.
func (c Int64ValueRecorder) Measurement(value int64) Measurement {
return c.int64Measurement(value)
}
// Record adds a new value to the list of ValueRecorder's records. The
// labels should contain the keys and values to be associated with
// this value.
func (c Float64ValueRecorder) Record(ctx context.Context, value float64, labels ...attribute.KeyValue) {
c.directRecord(ctx, number.NewFloat64Number(value), labels)
}
// Record adds a new value to the ValueRecorder's distribution. The
// labels should contain the keys and values to be associated with
// this value.
func (c Int64ValueRecorder) Record(ctx context.Context, value int64, labels ...attribute.KeyValue) {
c.directRecord(ctx, number.NewInt64Number(value), labels)
}
// Record adds a new value to the ValueRecorder's distribution using the labels
// previously bound to the ValueRecorder via Bind().
func (b BoundFloat64ValueRecorder) Record(ctx context.Context, value float64) {
b.directRecord(ctx, number.NewFloat64Number(value))
}
// Record adds a new value to the ValueRecorder's distribution using the labels
// previously bound to the ValueRecorder via Bind().
func (b BoundInt64ValueRecorder) Record(ctx context.Context, value int64) {
b.directRecord(ctx, number.NewInt64Number(value))
}

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// Copyright The OpenTelemetry Authors
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package metric // import "go.opentelemetry.io/otel/metric"
import (
"context"
"go.opentelemetry.io/otel/attribute"
"go.opentelemetry.io/otel/metric/number"
)
type NoopMeterProvider struct{}
type noopInstrument struct{}
type noopBoundInstrument struct{}
type NoopSync struct{ noopInstrument }
type NoopAsync struct{ noopInstrument }
var _ MeterProvider = NoopMeterProvider{}
var _ SyncImpl = NoopSync{}
var _ BoundSyncImpl = noopBoundInstrument{}
var _ AsyncImpl = NoopAsync{}
func (NoopMeterProvider) Meter(_ string, _ ...MeterOption) Meter {
return Meter{}
}
func (noopInstrument) Implementation() interface{} {
return nil
}
func (noopInstrument) Descriptor() Descriptor {
return Descriptor{}
}
func (noopBoundInstrument) RecordOne(context.Context, number.Number) {
}
func (noopBoundInstrument) Unbind() {
}
func (NoopSync) Bind([]attribute.KeyValue) BoundSyncImpl {
return noopBoundInstrument{}
}
func (NoopSync) RecordOne(context.Context, number.Number, []attribute.KeyValue) {
}

95
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// Copyright The OpenTelemetry Authors
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package metric // import "go.opentelemetry.io/otel/metric"
import (
"context"
"go.opentelemetry.io/otel/attribute"
"go.opentelemetry.io/otel/metric/number"
)
// MeterImpl is the interface an SDK must implement to supply a Meter
// implementation.
type MeterImpl interface {
// RecordBatch atomically records a batch of measurements.
RecordBatch(ctx context.Context, labels []attribute.KeyValue, measurement ...Measurement)
// NewSyncInstrument returns a newly constructed
// synchronous instrument implementation or an error, should
// one occur.
NewSyncInstrument(descriptor Descriptor) (SyncImpl, error)
// NewAsyncInstrument returns a newly constructed
// asynchronous instrument implementation or an error, should
// one occur.
NewAsyncInstrument(
descriptor Descriptor,
runner AsyncRunner,
) (AsyncImpl, error)
}
// InstrumentImpl is a common interface for synchronous and
// asynchronous instruments.
type InstrumentImpl interface {
// Implementation returns the underlying implementation of the
// instrument, which allows the implementation to gain access
// to its own representation especially from a `Measurement`.
Implementation() interface{}
// Descriptor returns a copy of the instrument's Descriptor.
Descriptor() Descriptor
}
// SyncImpl is the implementation-level interface to a generic
// synchronous instrument (e.g., ValueRecorder and Counter instruments).
type SyncImpl interface {
InstrumentImpl
// Bind creates an implementation-level bound instrument,
// binding a label set with this instrument implementation.
Bind(labels []attribute.KeyValue) BoundSyncImpl
// RecordOne captures a single synchronous metric event.
RecordOne(ctx context.Context, number number.Number, labels []attribute.KeyValue)
}
// BoundSyncImpl is the implementation-level interface to a
// generic bound synchronous instrument
type BoundSyncImpl interface {
// RecordOne captures a single synchronous metric event.
RecordOne(ctx context.Context, number number.Number)
// Unbind frees the resources associated with this bound instrument. It
// does not affect the metric this bound instrument was created through.
Unbind()
}
// AsyncImpl is an implementation-level interface to an
// asynchronous instrument (e.g., Observer instruments).
type AsyncImpl interface {
InstrumentImpl
}
// WrapMeterImpl constructs a `Meter` implementation from a
// `MeterImpl` implementation.
func WrapMeterImpl(impl MeterImpl, instrumentationName string, opts ...MeterOption) Meter {
return Meter{
impl: impl,
name: instrumentationName,
version: NewMeterConfig(opts...).InstrumentationVersion(),
}
}

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// Copyright The OpenTelemetry Authors
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
/*
Package number provides a number abstraction for instruments that
either support int64 or float64 input values.
This package is currently in a pre-GA phase. Backwards incompatible changes
may be introduced in subsequent minor version releases as we work to track the
evolving OpenTelemetry specification and user feedback.
*/
package number // import "go.opentelemetry.io/otel/metric/number"

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// Code generated by "stringer -type=Kind"; DO NOT EDIT.
package number
import "strconv"
func _() {
// An "invalid array index" compiler error signifies that the constant values have changed.
// Re-run the stringer command to generate them again.
var x [1]struct{}
_ = x[Int64Kind-0]
_ = x[Float64Kind-1]
}
const _Kind_name = "Int64KindFloat64Kind"
var _Kind_index = [...]uint8{0, 9, 20}
func (i Kind) String() string {
if i < 0 || i >= Kind(len(_Kind_index)-1) {
return "Kind(" + strconv.FormatInt(int64(i), 10) + ")"
}
return _Kind_name[_Kind_index[i]:_Kind_index[i+1]]
}

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// Copyright The OpenTelemetry Authors
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package number // import "go.opentelemetry.io/otel/metric/number"
//go:generate stringer -type=Kind
import (
"fmt"
"math"
"sync/atomic"
"go.opentelemetry.io/otel/internal"
)
// Kind describes the data type of the Number.
type Kind int8
const (
// Int64Kind means that the Number stores int64.
Int64Kind Kind = iota
// Float64Kind means that the Number stores float64.
Float64Kind
)
// Zero returns a zero value for a given Kind
func (k Kind) Zero() Number {
switch k {
case Int64Kind:
return NewInt64Number(0)
case Float64Kind:
return NewFloat64Number(0.)
default:
return Number(0)
}
}
// Minimum returns the minimum representable value
// for a given Kind
func (k Kind) Minimum() Number {
switch k {
case Int64Kind:
return NewInt64Number(math.MinInt64)
case Float64Kind:
return NewFloat64Number(-1. * math.MaxFloat64)
default:
return Number(0)
}
}
// Maximum returns the maximum representable value
// for a given Kind
func (k Kind) Maximum() Number {
switch k {
case Int64Kind:
return NewInt64Number(math.MaxInt64)
case Float64Kind:
return NewFloat64Number(math.MaxFloat64)
default:
return Number(0)
}
}
// Number represents either an integral or a floating point value. It
// needs to be accompanied with a source of Kind that describes
// the actual type of the value stored within Number.
type Number uint64
// - constructors
// NewNumberFromRaw creates a new Number from a raw value.
func NewNumberFromRaw(r uint64) Number {
return Number(r)
}
// NewInt64Number creates an integral Number.
func NewInt64Number(i int64) Number {
return NewNumberFromRaw(internal.Int64ToRaw(i))
}
// NewFloat64Number creates a floating point Number.
func NewFloat64Number(f float64) Number {
return NewNumberFromRaw(internal.Float64ToRaw(f))
}
// NewNumberSignChange returns a number with the same magnitude and
// the opposite sign. `kind` must describe the kind of number in `nn`.
func NewNumberSignChange(kind Kind, nn Number) Number {
switch kind {
case Int64Kind:
return NewInt64Number(-nn.AsInt64())
case Float64Kind:
return NewFloat64Number(-nn.AsFloat64())
}
return nn
}
// - as x
// AsNumber gets the Number.
func (n *Number) AsNumber() Number {
return *n
}
// AsRaw gets the uninterpreted raw value. Might be useful for some
// atomic operations.
func (n *Number) AsRaw() uint64 {
return uint64(*n)
}
// AsInt64 assumes that the value contains an int64 and returns it as
// such.
func (n *Number) AsInt64() int64 {
return internal.RawToInt64(n.AsRaw())
}
// AsFloat64 assumes that the measurement value contains a float64 and
// returns it as such.
func (n *Number) AsFloat64() float64 {
return internal.RawToFloat64(n.AsRaw())
}
// - as x atomic
// AsNumberAtomic gets the Number atomically.
func (n *Number) AsNumberAtomic() Number {
return NewNumberFromRaw(n.AsRawAtomic())
}
// AsRawAtomic gets the uninterpreted raw value atomically. Might be
// useful for some atomic operations.
func (n *Number) AsRawAtomic() uint64 {
return atomic.LoadUint64(n.AsRawPtr())
}
// AsInt64Atomic assumes that the number contains an int64 and returns
// it as such atomically.
func (n *Number) AsInt64Atomic() int64 {
return atomic.LoadInt64(n.AsInt64Ptr())
}
// AsFloat64Atomic assumes that the measurement value contains a
// float64 and returns it as such atomically.
func (n *Number) AsFloat64Atomic() float64 {
return internal.RawToFloat64(n.AsRawAtomic())
}
// - as x ptr
// AsRawPtr gets the pointer to the raw, uninterpreted raw
// value. Might be useful for some atomic operations.
func (n *Number) AsRawPtr() *uint64 {
return (*uint64)(n)
}
// AsInt64Ptr assumes that the number contains an int64 and returns a
// pointer to it.
func (n *Number) AsInt64Ptr() *int64 {
return internal.RawPtrToInt64Ptr(n.AsRawPtr())
}
// AsFloat64Ptr assumes that the number contains a float64 and returns a
// pointer to it.
func (n *Number) AsFloat64Ptr() *float64 {
return internal.RawPtrToFloat64Ptr(n.AsRawPtr())
}
// - coerce
// CoerceToInt64 casts the number to int64. May result in
// data/precision loss.
func (n *Number) CoerceToInt64(kind Kind) int64 {
switch kind {
case Int64Kind:
return n.AsInt64()
case Float64Kind:
return int64(n.AsFloat64())
default:
// you get what you deserve
return 0
}
}
// CoerceToFloat64 casts the number to float64. May result in
// data/precision loss.
func (n *Number) CoerceToFloat64(kind Kind) float64 {
switch kind {
case Int64Kind:
return float64(n.AsInt64())
case Float64Kind:
return n.AsFloat64()
default:
// you get what you deserve
return 0
}
}
// - set
// SetNumber sets the number to the passed number. Both should be of
// the same kind.
func (n *Number) SetNumber(nn Number) {
*n.AsRawPtr() = nn.AsRaw()
}
// SetRaw sets the number to the passed raw value. Both number and the
// raw number should represent the same kind.
func (n *Number) SetRaw(r uint64) {
*n.AsRawPtr() = r
}
// SetInt64 assumes that the number contains an int64 and sets it to
// the passed value.
func (n *Number) SetInt64(i int64) {
*n.AsInt64Ptr() = i
}
// SetFloat64 assumes that the number contains a float64 and sets it
// to the passed value.
func (n *Number) SetFloat64(f float64) {
*n.AsFloat64Ptr() = f
}
// - set atomic
// SetNumberAtomic sets the number to the passed number
// atomically. Both should be of the same kind.
func (n *Number) SetNumberAtomic(nn Number) {
atomic.StoreUint64(n.AsRawPtr(), nn.AsRaw())
}
// SetRawAtomic sets the number to the passed raw value
// atomically. Both number and the raw number should represent the
// same kind.
func (n *Number) SetRawAtomic(r uint64) {
atomic.StoreUint64(n.AsRawPtr(), r)
}
// SetInt64Atomic assumes that the number contains an int64 and sets
// it to the passed value atomically.
func (n *Number) SetInt64Atomic(i int64) {
atomic.StoreInt64(n.AsInt64Ptr(), i)
}
// SetFloat64Atomic assumes that the number contains a float64 and
// sets it to the passed value atomically.
func (n *Number) SetFloat64Atomic(f float64) {
atomic.StoreUint64(n.AsRawPtr(), internal.Float64ToRaw(f))
}
// - swap
// SwapNumber sets the number to the passed number and returns the old
// number. Both this number and the passed number should be of the
// same kind.
func (n *Number) SwapNumber(nn Number) Number {
old := *n
n.SetNumber(nn)
return old
}
// SwapRaw sets the number to the passed raw value and returns the old
// raw value. Both number and the raw number should represent the same
// kind.
func (n *Number) SwapRaw(r uint64) uint64 {
old := n.AsRaw()
n.SetRaw(r)
return old
}
// SwapInt64 assumes that the number contains an int64, sets it to the
// passed value and returns the old int64 value.
func (n *Number) SwapInt64(i int64) int64 {
old := n.AsInt64()
n.SetInt64(i)
return old
}
// SwapFloat64 assumes that the number contains an float64, sets it to
// the passed value and returns the old float64 value.
func (n *Number) SwapFloat64(f float64) float64 {
old := n.AsFloat64()
n.SetFloat64(f)
return old
}
// - swap atomic
// SwapNumberAtomic sets the number to the passed number and returns
// the old number atomically. Both this number and the passed number
// should be of the same kind.
func (n *Number) SwapNumberAtomic(nn Number) Number {
return NewNumberFromRaw(atomic.SwapUint64(n.AsRawPtr(), nn.AsRaw()))
}
// SwapRawAtomic sets the number to the passed raw value and returns
// the old raw value atomically. Both number and the raw number should
// represent the same kind.
func (n *Number) SwapRawAtomic(r uint64) uint64 {
return atomic.SwapUint64(n.AsRawPtr(), r)
}
// SwapInt64Atomic assumes that the number contains an int64, sets it
// to the passed value and returns the old int64 value atomically.
func (n *Number) SwapInt64Atomic(i int64) int64 {
return atomic.SwapInt64(n.AsInt64Ptr(), i)
}
// SwapFloat64Atomic assumes that the number contains an float64, sets
// it to the passed value and returns the old float64 value
// atomically.
func (n *Number) SwapFloat64Atomic(f float64) float64 {
return internal.RawToFloat64(atomic.SwapUint64(n.AsRawPtr(), internal.Float64ToRaw(f)))
}
// - add
// AddNumber assumes that this and the passed number are of the passed
// kind and adds the passed number to this number.
func (n *Number) AddNumber(kind Kind, nn Number) {
switch kind {
case Int64Kind:
n.AddInt64(nn.AsInt64())
case Float64Kind:
n.AddFloat64(nn.AsFloat64())
}
}
// AddRaw assumes that this number and the passed raw value are of the
// passed kind and adds the passed raw value to this number.
func (n *Number) AddRaw(kind Kind, r uint64) {
n.AddNumber(kind, NewNumberFromRaw(r))
}
// AddInt64 assumes that the number contains an int64 and adds the
// passed int64 to it.
func (n *Number) AddInt64(i int64) {
*n.AsInt64Ptr() += i
}
// AddFloat64 assumes that the number contains a float64 and adds the
// passed float64 to it.
func (n *Number) AddFloat64(f float64) {
*n.AsFloat64Ptr() += f
}
// - add atomic
// AddNumberAtomic assumes that this and the passed number are of the
// passed kind and adds the passed number to this number atomically.
func (n *Number) AddNumberAtomic(kind Kind, nn Number) {
switch kind {
case Int64Kind:
n.AddInt64Atomic(nn.AsInt64())
case Float64Kind:
n.AddFloat64Atomic(nn.AsFloat64())
}
}
// AddRawAtomic assumes that this number and the passed raw value are
// of the passed kind and adds the passed raw value to this number
// atomically.
func (n *Number) AddRawAtomic(kind Kind, r uint64) {
n.AddNumberAtomic(kind, NewNumberFromRaw(r))
}
// AddInt64Atomic assumes that the number contains an int64 and adds
// the passed int64 to it atomically.
func (n *Number) AddInt64Atomic(i int64) {
atomic.AddInt64(n.AsInt64Ptr(), i)
}
// AddFloat64Atomic assumes that the number contains a float64 and
// adds the passed float64 to it atomically.
func (n *Number) AddFloat64Atomic(f float64) {
for {
o := n.AsFloat64Atomic()
if n.CompareAndSwapFloat64(o, o+f) {
break
}
}
}
// - compare and swap (atomic only)
// CompareAndSwapNumber does the atomic CAS operation on this
// number. This number and passed old and new numbers should be of the
// same kind.
func (n *Number) CompareAndSwapNumber(on, nn Number) bool {
return atomic.CompareAndSwapUint64(n.AsRawPtr(), on.AsRaw(), nn.AsRaw())
}
// CompareAndSwapRaw does the atomic CAS operation on this
// number. This number and passed old and new raw values should be of
// the same kind.
func (n *Number) CompareAndSwapRaw(or, nr uint64) bool {
return atomic.CompareAndSwapUint64(n.AsRawPtr(), or, nr)
}
// CompareAndSwapInt64 assumes that this number contains an int64 and
// does the atomic CAS operation on it.
func (n *Number) CompareAndSwapInt64(oi, ni int64) bool {
return atomic.CompareAndSwapInt64(n.AsInt64Ptr(), oi, ni)
}
// CompareAndSwapFloat64 assumes that this number contains a float64 and
// does the atomic CAS operation on it.
func (n *Number) CompareAndSwapFloat64(of, nf float64) bool {
return atomic.CompareAndSwapUint64(n.AsRawPtr(), internal.Float64ToRaw(of), internal.Float64ToRaw(nf))
}
// - compare
// CompareNumber compares two Numbers given their kind. Both numbers
// should have the same kind. This returns:
// 0 if the numbers are equal
// -1 if the subject `n` is less than the argument `nn`
// +1 if the subject `n` is greater than the argument `nn`
func (n *Number) CompareNumber(kind Kind, nn Number) int {
switch kind {
case Int64Kind:
return n.CompareInt64(nn.AsInt64())
case Float64Kind:
return n.CompareFloat64(nn.AsFloat64())
default:
// you get what you deserve
return 0
}
}
// CompareRaw compares two numbers, where one is input as a raw
// uint64, interpreting both values as a `kind` of number.
func (n *Number) CompareRaw(kind Kind, r uint64) int {
return n.CompareNumber(kind, NewNumberFromRaw(r))
}
// CompareInt64 assumes that the Number contains an int64 and performs
// a comparison between the value and the other value. It returns the
// typical result of the compare function: -1 if the value is less
// than the other, 0 if both are equal, 1 if the value is greater than
// the other.
func (n *Number) CompareInt64(i int64) int {
this := n.AsInt64()
if this < i {
return -1
} else if this > i {
return 1
}
return 0
}
// CompareFloat64 assumes that the Number contains a float64 and
// performs a comparison between the value and the other value. It
// returns the typical result of the compare function: -1 if the value
// is less than the other, 0 if both are equal, 1 if the value is
// greater than the other.
//
// Do not compare NaN values.
func (n *Number) CompareFloat64(f float64) int {
this := n.AsFloat64()
if this < f {
return -1
} else if this > f {
return 1
}
return 0
}
// - relations to zero
// IsPositive returns true if the actual value is greater than zero.
func (n *Number) IsPositive(kind Kind) bool {
return n.compareWithZero(kind) > 0
}
// IsNegative returns true if the actual value is less than zero.
func (n *Number) IsNegative(kind Kind) bool {
return n.compareWithZero(kind) < 0
}
// IsZero returns true if the actual value is equal to zero.
func (n *Number) IsZero(kind Kind) bool {
return n.compareWithZero(kind) == 0
}
// - misc
// Emit returns a string representation of the raw value of the
// Number. A %d is used for integral values, %f for floating point
// values.
func (n *Number) Emit(kind Kind) string {
switch kind {
case Int64Kind:
return fmt.Sprintf("%d", n.AsInt64())
case Float64Kind:
return fmt.Sprintf("%f", n.AsFloat64())
default:
return ""
}
}
// AsInterface returns the number as an interface{}, typically used
// for Kind-correct JSON conversion.
func (n *Number) AsInterface(kind Kind) interface{} {
switch kind {
case Int64Kind:
return n.AsInt64()
case Float64Kind:
return n.AsFloat64()
default:
return math.NaN()
}
}
// - private stuff
func (n *Number) compareWithZero(kind Kind) int {
switch kind {
case Int64Kind:
return n.CompareInt64(0)
case Float64Kind:
return n.CompareFloat64(0.)
default:
// you get what you deserve
return 0
}
}

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// Copyright The OpenTelemetry Authors
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
/*
Package registry provides a non-standalone implementation of
MeterProvider that adds uniqueness checking for instrument descriptors
on top of other MeterProvider it wraps.
This package is currently in a pre-GA phase. Backwards incompatible changes
may be introduced in subsequent minor version releases as we work to track the
evolving OpenTelemetry specification and user feedback.
*/
package registry // import "go.opentelemetry.io/otel/metric/registry"

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// Copyright The OpenTelemetry Authors
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package registry // import "go.opentelemetry.io/otel/metric/registry"
import (
"context"
"fmt"
"sync"
"go.opentelemetry.io/otel/attribute"
"go.opentelemetry.io/otel/metric"
)
// MeterProvider is a standard MeterProvider for wrapping `MeterImpl`
type MeterProvider struct {
impl metric.MeterImpl
}
var _ metric.MeterProvider = (*MeterProvider)(nil)
// uniqueInstrumentMeterImpl implements the metric.MeterImpl interface, adding
// uniqueness checking for instrument descriptors. Use NewUniqueInstrumentMeter
// to wrap an implementation with uniqueness checking.
type uniqueInstrumentMeterImpl struct {
lock sync.Mutex
impl metric.MeterImpl
state map[key]metric.InstrumentImpl
}
var _ metric.MeterImpl = (*uniqueInstrumentMeterImpl)(nil)
type key struct {
instrumentName string
instrumentationName string
InstrumentationVersion string
}
// NewMeterProvider returns a new provider that implements instrument
// name-uniqueness checking.
func NewMeterProvider(impl metric.MeterImpl) *MeterProvider {
return &MeterProvider{
impl: NewUniqueInstrumentMeterImpl(impl),
}
}
// Meter implements MeterProvider.
func (p *MeterProvider) Meter(instrumentationName string, opts ...metric.MeterOption) metric.Meter {
return metric.WrapMeterImpl(p.impl, instrumentationName, opts...)
}
// ErrMetricKindMismatch is the standard error for mismatched metric
// instrument definitions.
var ErrMetricKindMismatch = fmt.Errorf(
"a metric was already registered by this name with another kind or number type")
// NewUniqueInstrumentMeterImpl returns a wrapped metric.MeterImpl with
// the addition of uniqueness checking.
func NewUniqueInstrumentMeterImpl(impl metric.MeterImpl) metric.MeterImpl {
return &uniqueInstrumentMeterImpl{
impl: impl,
state: map[key]metric.InstrumentImpl{},
}
}
// RecordBatch implements metric.MeterImpl.
func (u *uniqueInstrumentMeterImpl) RecordBatch(ctx context.Context, labels []attribute.KeyValue, ms ...metric.Measurement) {
u.impl.RecordBatch(ctx, labels, ms...)
}
func keyOf(descriptor metric.Descriptor) key {
return key{
descriptor.Name(),
descriptor.InstrumentationName(),
descriptor.InstrumentationVersion(),
}
}
// NewMetricKindMismatchError formats an error that describes a
// mismatched metric instrument definition.
func NewMetricKindMismatchError(desc metric.Descriptor) error {
return fmt.Errorf("metric was %s (%s %s)registered as a %s %s: %w",
desc.Name(),
desc.InstrumentationName(),
desc.InstrumentationVersion(),
desc.NumberKind(),
desc.InstrumentKind(),
ErrMetricKindMismatch)
}
// Compatible determines whether two metric.Descriptors are considered
// the same for the purpose of uniqueness checking.
func Compatible(candidate, existing metric.Descriptor) bool {
return candidate.InstrumentKind() == existing.InstrumentKind() &&
candidate.NumberKind() == existing.NumberKind()
}
// checkUniqueness returns an ErrMetricKindMismatch error if there is
// a conflict between a descriptor that was already registered and the
// `descriptor` argument. If there is an existing compatible
// registration, this returns the already-registered instrument. If
// there is no conflict and no prior registration, returns (nil, nil).
func (u *uniqueInstrumentMeterImpl) checkUniqueness(descriptor metric.Descriptor) (metric.InstrumentImpl, error) {
impl, ok := u.state[keyOf(descriptor)]
if !ok {
return nil, nil
}
if !Compatible(descriptor, impl.Descriptor()) {
return nil, NewMetricKindMismatchError(impl.Descriptor())
}
return impl, nil
}
// NewSyncInstrument implements metric.MeterImpl.
func (u *uniqueInstrumentMeterImpl) NewSyncInstrument(descriptor metric.Descriptor) (metric.SyncImpl, error) {
u.lock.Lock()
defer u.lock.Unlock()
impl, err := u.checkUniqueness(descriptor)
if err != nil {
return nil, err
} else if impl != nil {
return impl.(metric.SyncImpl), nil
}
syncInst, err := u.impl.NewSyncInstrument(descriptor)
if err != nil {
return nil, err
}
u.state[keyOf(descriptor)] = syncInst
return syncInst, nil
}
// NewAsyncInstrument implements metric.MeterImpl.
func (u *uniqueInstrumentMeterImpl) NewAsyncInstrument(
descriptor metric.Descriptor,
runner metric.AsyncRunner,
) (metric.AsyncImpl, error) {
u.lock.Lock()
defer u.lock.Unlock()
impl, err := u.checkUniqueness(descriptor)
if err != nil {
return nil, err
} else if impl != nil {
return impl.(metric.AsyncImpl), nil
}
asyncInst, err := u.impl.NewAsyncInstrument(descriptor, runner)
if err != nil {
return nil, err
}
u.state[keyOf(descriptor)] = asyncInst
return asyncInst, nil
}

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// Copyright The OpenTelemetry Authors
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
// Package unit provides units.
//
// This package is currently in a pre-GA phase. Backwards incompatible changes
// may be introduced in subsequent minor version releases as we work to track
// the evolving OpenTelemetry specification and user feedback.
package unit // import "go.opentelemetry.io/otel/metric/unit"

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// Copyright The OpenTelemetry Authors
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package unit // import "go.opentelemetry.io/otel/metric/unit"
type Unit string
// Units defined by OpenTelemetry.
const (
Dimensionless Unit = "1"
Bytes Unit = "By"
Milliseconds Unit = "ms"
)

16
vendor/modules.txt vendored
View File

@ -239,6 +239,8 @@ github.com/docker/go-events
github.com/docker/go-metrics
# github.com/docker/go-units v0.4.0
github.com/docker/go-units
# github.com/felixge/httpsnoop v1.0.2
github.com/felixge/httpsnoop
# github.com/gofrs/flock v0.7.3
github.com/gofrs/flock
# github.com/gogo/googleapis v1.4.0
@ -385,8 +387,12 @@ go.opencensus.io/trace/internal
go.opencensus.io/trace/tracestate
# go.opentelemetry.io/contrib v0.21.0
go.opentelemetry.io/contrib
# go.opentelemetry.io/contrib/instrumentation/google.golang.org/grpc/otelgrpc v0.21.0
# go.opentelemetry.io/contrib/instrumentation/google.golang.org/grpc/otelgrpc v0.21.0 => github.com/tonistiigi/opentelemetry-go-contrib/instrumentation/google.golang.org/grpc/otelgrpc v0.0.0-20210714055410-d010b05b4939
go.opentelemetry.io/contrib/instrumentation/google.golang.org/grpc/otelgrpc
# go.opentelemetry.io/contrib/instrumentation/net/http/httptrace/otelhttptrace v0.21.0 => github.com/tonistiigi/opentelemetry-go-contrib/instrumentation/net/http/httptrace/otelhttptrace v0.0.0-20210714055410-d010b05b4939
go.opentelemetry.io/contrib/instrumentation/net/http/httptrace/otelhttptrace
# go.opentelemetry.io/contrib/instrumentation/net/http/otelhttp v0.21.0 => github.com/tonistiigi/opentelemetry-go-contrib/instrumentation/net/http/otelhttp v0.0.0-20210714055410-d010b05b4939
go.opentelemetry.io/contrib/instrumentation/net/http/otelhttp
# go.opentelemetry.io/otel v1.0.0-RC1
go.opentelemetry.io/otel
go.opentelemetry.io/otel/attribute
@ -412,6 +418,14 @@ go.opentelemetry.io/otel/exporters/otlp/otlptrace/internal/tracetransform
go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracegrpc
# go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracehttp v1.0.0-RC1
go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracehttp
# go.opentelemetry.io/otel/internal/metric v0.21.0
go.opentelemetry.io/otel/internal/metric/global
# go.opentelemetry.io/otel/metric v0.21.0
go.opentelemetry.io/otel/metric
go.opentelemetry.io/otel/metric/global
go.opentelemetry.io/otel/metric/number
go.opentelemetry.io/otel/metric/registry
go.opentelemetry.io/otel/metric/unit
# go.opentelemetry.io/otel/sdk v1.0.0-RC1
go.opentelemetry.io/otel/sdk/instrumentation
go.opentelemetry.io/otel/sdk/internal