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// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
// vim: ts=8 sw=2 smarttab
/*
* Ceph - scalable distributed file system
*
* Copyright (C) 2016 John Spray <john.spray@redhat.com>
*
* This is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License version 2.1, as published by the Free Software
* Foundation. See file COPYING.
*/
// Python.h comes first because otherwise it clobbers ceph's assert
#include <Python.h>
#include "PyModule.h"
#include "common/debug.h"
#include "mgr/Gil.h"
#include "PyModuleRunner.h"
#define dout_context g_ceph_context
#define dout_subsys ceph_subsys_mgr
PyModuleRunner::~PyModuleRunner()
{
Gil gil(py_module->pMyThreadState, true);
if (pClassInstance) {
Py_XDECREF(pClassInstance);
pClassInstance = nullptr;
}
}
int PyModuleRunner::serve()
{
ceph_assert(pClassInstance != nullptr);
// This method is called from a separate OS thread (i.e. a thread not
// created by Python), so tell Gil to wrap this in a new thread state.
Gil gil(py_module->pMyThreadState, true);
auto pValue = PyObject_CallMethod(pClassInstance,
const_cast<char*>("serve"), nullptr);
int r = 0;
if (pValue != NULL) {
Py_DECREF(pValue);
} else {
// This is not a very informative log message because it's an
// unknown/unexpected exception that we can't say much about.
// Get short exception message for the cluster log, before
// dumping the full backtrace to the local log.
std::string exc_msg = peek_pyerror();
clog->error() << "Unhandled exception from module '" << get_name()
<< "' while running on mgr." << g_conf()->name.get_id()
<< ": " << exc_msg;
derr << get_name() << ".serve:" << dendl;
derr << handle_pyerror() << dendl;
py_module->fail(exc_msg);
return -EINVAL;
}
return r;
}
void PyModuleRunner::shutdown()
{
ceph_assert(pClassInstance != nullptr);
Gil gil(py_module->pMyThreadState, true);
auto pValue = PyObject_CallMethod(pClassInstance,
const_cast<char*>("shutdown"), nullptr);
if (pValue != NULL) {
Py_DECREF(pValue);
} else {
derr << "Failed to invoke shutdown() on " << get_name() << dendl;
derr << handle_pyerror() << dendl;
}
dead = true;
}
void PyModuleRunner::log(const std::string &record)
{
#undef dout_prefix
#define dout_prefix *_dout
dout(0) << record << dendl;
#undef dout_prefix
#define dout_prefix *_dout << "mgr " << __func__ << " "
}
void* PyModuleRunner::PyModuleRunnerThread::entry()
{
// No need to acquire the GIL here; the module does it.
dout(4) << "Entering thread for " << mod->get_name() << dendl;
mod->serve();
return nullptr;
}
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