deb-murano/murano/engine/environment.py
Stan Lagun 83ba5fa731 Fixes agent call may hanged upon action call
When action called AgentListener automatically starts listening upon
first EP send to the agent. But Environment.deploy() were the only
place where AgentLister was stopped. So when action other than
Environment.deploy() was called there is no one to stop listener.
Thus on each action call new listener on the same RabbitMQ queue
was started causing listeners to steal messages from each other.
Agent.call() that never received response from agent caused
deployment/action hang.

Change-Id: Ia778c816a0e2f57d1f694fd1f128848f61b21a2d
Closes-Bug: #1425963
2015-03-09 08:44:16 +00:00

56 lines
1.7 KiB
Python

# Copyright (c) 2013 Mirantis Inc.
#
# 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.
from murano.common.i18n import _LE
import murano.openstack.common.log as logging
LOG = logging.getLogger(__name__)
class Environment(object):
def __init__(self):
self.token = None
self.tenant_id = None
self.trust_id = None
self.system_attributes = {}
self.clients = None
self._set_up_list = []
self._tear_down_list = []
def on_session_start(self, delegate):
self._set_up_list.append(delegate)
def on_session_finish(self, delegate):
self._tear_down_list.append(delegate)
def start(self):
for delegate in self._set_up_list:
try:
delegate()
except Exception:
LOG.exception(_LE('Unhandled exception on invocation of '
'pre-execution hook'))
self._set_up_list = []
def finish(self):
for delegate in self._tear_down_list:
try:
delegate()
except Exception:
LOG.exception(_LE('Unhandled exception on invocation of '
'post-execution hook'))
self._tear_down_list = []