52 lines
2.0 KiB
Python
52 lines
2.0 KiB
Python
# Copyright 2013 Red Hat, Inc.
|
|
# Copyright 2013 New Dream Network, LLC (DreamHost)
|
|
#
|
|
# 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.
|
|
|
|
import logging
|
|
|
|
from eventlet.green import threading as greenthreading
|
|
import futurist
|
|
|
|
from oslo_messaging._executors import impl_pooledexecutor
|
|
from oslo_messaging import localcontext
|
|
|
|
LOG = logging.getLogger(__name__)
|
|
|
|
|
|
class EventletExecutor(impl_pooledexecutor.PooledExecutor):
|
|
|
|
"""A message executor which integrates with eventlet.
|
|
|
|
This is an executor which polls for incoming messages from a greenthread
|
|
and dispatches each message in its own greenthread.
|
|
|
|
The stop() method kills the message polling greenthread and the wait()
|
|
method waits for all message dispatch greenthreads to complete.
|
|
"""
|
|
|
|
def __init__(self, conf, listener, dispatcher):
|
|
super(EventletExecutor, self).__init__(conf, listener, dispatcher)
|
|
if not isinstance(localcontext._STORE, greenthreading.local):
|
|
LOG.debug('eventlet executor in use but the threading module '
|
|
'has not been monkeypatched or has been '
|
|
'monkeypatched after the oslo.messaging library '
|
|
'have been loaded. This will results in unpredictable '
|
|
'behavior. In the future, we will raise a '
|
|
'RuntimeException in this case.')
|
|
|
|
_executor_cls = futurist.GreenThreadPoolExecutor
|
|
_lock_cls = greenthreading.Lock
|
|
_event_cls = greenthreading.Event
|
|
_thread_cls = greenthreading.Thread
|