76 lines
2.7 KiB
Python
76 lines
2.7 KiB
Python
# vim: tabstop=4 shiftwidth=4 softtabstop=4
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# Copyright 2010 United States Government as represented by the
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# Administrator of the National Aeronautics and Space Administration.
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# All Rights Reserved.
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# Copyright 2011 Red Hat, Inc.
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#
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# Licensed under the Apache License, Version 2.0 (the "License"); you may
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# not use this file except in compliance with the License. You may obtain
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# a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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# License for the specific language governing permissions and limitations
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# under the License.
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from quantum.openstack.common.gettextutils import _
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from quantum.openstack.common import log as logging
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from quantum.openstack.common import rpc
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from quantum.openstack.common.rpc import dispatcher as rpc_dispatcher
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from quantum.openstack.common import service
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LOG = logging.getLogger(__name__)
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class Service(service.Service):
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"""Service object for binaries running on hosts.
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A service enables rpc by listening to queues based on topic and host."""
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def __init__(self, host, topic, manager=None):
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super(Service, self).__init__()
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self.host = host
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self.topic = topic
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if manager is None:
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self.manager = self
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else:
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self.manager = manager
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def start(self):
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super(Service, self).start()
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self.conn = rpc.create_connection(new=True)
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LOG.debug(_("Creating Consumer connection for Service %s") %
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self.topic)
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dispatcher = rpc_dispatcher.RpcDispatcher([self.manager])
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# Share this same connection for these Consumers
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self.conn.create_consumer(self.topic, dispatcher, fanout=False)
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node_topic = '%s.%s' % (self.topic, self.host)
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self.conn.create_consumer(node_topic, dispatcher, fanout=False)
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self.conn.create_consumer(self.topic, dispatcher, fanout=True)
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# Hook to allow the manager to do other initializations after
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# the rpc connection is created.
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if callable(getattr(self.manager, 'initialize_service_hook', None)):
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self.manager.initialize_service_hook(self)
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# Consume from all consumers in a thread
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self.conn.consume_in_thread()
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def stop(self):
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# Try to shut the connection down, but if we get any sort of
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# errors, go ahead and ignore them.. as we're shutting down anyway
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try:
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self.conn.close()
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except Exception:
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pass
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super(Service, self).stop()
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