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Start Jupyter with single Process

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This commit is contained in:
Florian Märkl 2018-02-08 15:30:59 +01:00 committed by xarkes
parent 7526965b26
commit cea55dfdb1
2 changed files with 37 additions and 31 deletions
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65
src/utils/JupyterConnection.cpp
View File

@ -16,17 +16,42 @@ JupyterConnection::~JupyterConnection()
{
cmdServer->stop();
process->terminate();
urlProcess->terminate();
}
const char *urlPy = "from notebook import notebookapp\n"
"import json\n"
"import time\n"
const char *jupyterPyCode = "import sys\n"
"from notebook.notebookapp import *\n"
"\n"
"time.sleep(3)\n"
"\n"
"servers = [si for si in notebookapp.list_running_servers()]\n"
"print(json.dumps(servers))";
"class CutterNotebookApp(NotebookApp):\n"
" def start(self):\n"
" \"\"\" see NotebookApp.start() \"\"\"\n"
"\n"
" super(NotebookApp, self).start()\n"
"\n"
" self.write_server_info_file()\n"
"\n"
" if self.token and self._token_generated:\n"
" url = url_concat(self.connection_url, {'token': self.token})\n"
" sys.stdout.write(url + \"\\n\")\n"
" sys.stdout.flush()\n"
"\n"
" self.io_loop = ioloop.IOLoop.current()\n"
" if sys.platform.startswith('win'):\n"
" # add no-op to wake every 5s\n"
" # to handle signals that may be ignored by the inner loop\n"
" pc = ioloop.PeriodicCallback(lambda: None, 5000)\n"
" pc.start()\n"
" try:\n"
" self.io_loop.start()\n"
" except KeyboardInterrupt:\n"
" self.log.info(_(\"Interrupted...\"))\n"
" finally:\n"
" self.remove_server_info_file()\n"
" self.cleanup_kernels()\n"
"\n"
"\n"
"if __name__ == \"__main__\":\n"
" CutterNotebookApp.launch_instance()";
void JupyterConnection::start()
{
@ -34,11 +59,7 @@ void JupyterConnection::start()
connect(process, &QProcess::readyReadStandardError, this, &JupyterConnection::readStandardError);
connect(process, &QProcess::readyReadStandardOutput, this, &JupyterConnection::readStandardOutput);
connect(process, &QProcess::errorOccurred, this, [](QProcess::ProcessError error){ qWarning() << "Jupyter error occurred:" << error; });
process->start("jupyter", {"notebook", "--no-browser", "-y"});
urlProcess = new QProcess(this);
connect(urlProcess, &QProcess::readyReadStandardOutput, this, &JupyterConnection::readUrlStandardOutput);
urlProcess->start("python3", {"-c", urlPy});
process->start("python3", {"-c", jupyterPyCode});
QThread *cmdServerThread = new QThread(this);
cmdServer = new CommandServer();
@ -54,24 +75,12 @@ void JupyterConnection::start()
void JupyterConnection::readStandardError()
{
auto data = process->readAllStandardError();
printf("Jupyter stderr: %s", data.constData());
printf("Jupyter stderr: %s\n", data.constData());
}
void JupyterConnection::readStandardOutput()
{
auto data = process->readAllStandardOutput();
printf("Jupyter stdout: %s", data.constData());
}
void JupyterConnection::readUrlStandardOutput()
{
QJsonDocument doc = QJsonDocument::fromJson(urlProcess->readAllStandardOutput());
for(QJsonValue value : doc.array())
{
QJsonObject serverObject = value.toObject();
QString url = serverObject["url"].toString() + "?token=" + serverObject["token"].toString();
emit urlReceived(url);
break;
}
}
printf("Jupyter stdout: %s\n", data.constData());
emit urlReceived(data);
}

3
src/utils/JupyterConnection.h
View File

@ -19,14 +19,11 @@ signals:
private:
QProcess *process;
QProcess *urlProcess;
CommandServer *cmdServer;
private slots:
void readStandardError();
void readStandardOutput();
void readUrlStandardOutput();
};
#endif //JUPYTERCONNECTION_H