eb861f86ab
In this PS, I have refactored the Decision Engine and the Applier to use the oslo service utility. Change-Id: If29158cc9b5e5e50f6c69d67c232cceeb07084f2 Closes-Bug: #1541850
121 lines
3.7 KiB
Python
121 lines
3.7 KiB
Python
# -*- encoding: utf-8 -*-
|
|
# Copyright (c) 2015 b<>com
|
|
#
|
|
# 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 socket
|
|
import threading
|
|
|
|
import eventlet
|
|
from oslo_config import cfg
|
|
from oslo_log import log
|
|
import oslo_messaging as om
|
|
|
|
from watcher.common import rpc
|
|
from watcher._i18n import _LE, _LW
|
|
|
|
# NOTE:
|
|
# Ubuntu 14.04 forces librabbitmq when kombu is used
|
|
# Unfortunately it forces a version that has a crash
|
|
# bug. Calling eventlet.monkey_patch() tells kombu
|
|
# to use libamqp instead.
|
|
eventlet.monkey_patch()
|
|
|
|
LOG = log.getLogger(__name__)
|
|
CONF = cfg.CONF
|
|
|
|
|
|
class MessagingHandler(threading.Thread):
|
|
|
|
def __init__(self, publisher_id, topic_name, endpoints, version,
|
|
serializer=None):
|
|
super(MessagingHandler, self).__init__()
|
|
self.publisher_id = publisher_id
|
|
self.topic_name = topic_name
|
|
self.__endpoints = []
|
|
self.__serializer = serializer
|
|
self.__version = version
|
|
|
|
self.__server = None
|
|
self.__notifier = None
|
|
self.__transport = None
|
|
self.add_endpoints(endpoints)
|
|
|
|
def add_endpoints(self, endpoints):
|
|
self.__endpoints.extend(endpoints)
|
|
|
|
def remove_endpoint(self, endpoint):
|
|
if endpoint in self.__endpoints:
|
|
self.__endpoints.remove(endpoint)
|
|
|
|
@property
|
|
def endpoints(self):
|
|
return self.__endpoints
|
|
|
|
@property
|
|
def transport(self):
|
|
return self.__transport
|
|
|
|
def build_notifier(self):
|
|
serializer = rpc.RequestContextSerializer(rpc.JsonPayloadSerializer())
|
|
return om.Notifier(
|
|
self.__transport,
|
|
publisher_id=self.publisher_id,
|
|
topic=self.topic_name,
|
|
serializer=serializer
|
|
)
|
|
|
|
def build_server(self, target):
|
|
return om.get_rpc_server(self.__transport, target,
|
|
self.__endpoints,
|
|
serializer=self.__serializer)
|
|
|
|
def _configure(self):
|
|
try:
|
|
self.__transport = om.get_transport(CONF)
|
|
self.__notifier = self.build_notifier()
|
|
if len(self.__endpoints):
|
|
target = om.Target(
|
|
topic=self.topic_name,
|
|
# For compatibility, we can override it with 'host' opt
|
|
server=CONF.host or socket.getfqdn(),
|
|
version=self.__version,
|
|
)
|
|
self.__server = self.build_server(target)
|
|
else:
|
|
LOG.warning(
|
|
_LW("No endpoint defined; can only publish events"))
|
|
except Exception as e:
|
|
LOG.exception(e)
|
|
LOG.error(_LE("Messaging configuration error"))
|
|
|
|
def run(self):
|
|
LOG.debug("configure MessagingHandler for %s" % self.topic_name)
|
|
self._configure()
|
|
if len(self.__endpoints) > 0:
|
|
LOG.debug("Starting up server")
|
|
self.__server.start()
|
|
|
|
def stop(self):
|
|
LOG.debug('Stopped server')
|
|
self.__server.wait()
|
|
self.__server.stop()
|
|
|
|
def publish_event(self, event_type, payload, request_id=None):
|
|
self.__notifier.info(
|
|
{'version_api': self.__version,
|
|
'request_id': request_id},
|
|
{'event_id': event_type}, payload
|
|
)
|