61 lines
2.2 KiB
Python
61 lines
2.2 KiB
Python
#!/usr/bin/env python3
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# -*- coding: utf-8 -*-
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import logging
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from sqlalchemy.orm import sessionmaker, scoped_session
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from sqlalchemy import MetaData, Table
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from sqlalchemy.ext.asyncio import AsyncSession
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from sqlalchemy.exc import IllegalStateChangeError
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import asyncio
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class database:
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def __init__(self, db_engine):
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self.CredentialsTable = None
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self.HostsTable = None
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self.db_engine = db_engine
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self.metadata = MetaData()
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asyncio.run(self.reflect_tables())
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session_factory = sessionmaker(bind=self.db_engine, expire_on_commit=True, class_=AsyncSession)
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Session = scoped_session(session_factory)
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# this is still named "conn" when it is the session object; TODO: rename
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self.conn = Session()
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@staticmethod
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def db_schema(db_conn):
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db_conn.execute('''CREATE TABLE "credentials" (
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"id" integer PRIMARY KEY,
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"username" text,
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"password" text,
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"pkey" text
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)''')
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db_conn.execute('''CREATE TABLE "hosts" (
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"id" integer PRIMARY KEY,
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"ip" text,
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"hostname" text,
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"port" integer,
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"server_banner" text
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)''')
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async def shutdown_db(self):
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try:
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await asyncio.shield(self.conn.close())
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# due to the async nature of CME, sometimes session state is a bit messy and this will throw:
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# Method 'close()' can't be called here; method '_connection_for_bind()' is already in progress and
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# this would cause an unexpected state change to <SessionTransactionState.CLOSED: 5>
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except IllegalStateChangeError as e:
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logging.debug(f"Error while closing session db object: {e}")
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async def reflect_tables(self):
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async with self.db_engine.connect() as conn:
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await conn.run_sync(self.metadata.reflect)
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self.CredentialsTable = Table("credentials", self.metadata, autoload_with=self.db_engine)
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self.HostsTable = Table("hosts", self.metadata, autoload_with=self.db_engine)
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def clear_database(self):
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for table in self.metadata.sorted_tables:
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asyncio.run(self.conn.execute(table.delete()))
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