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# Copyright 2013 OpenStack Foundation
# Copyright 2013 Rackspace Hosting
# Copyright 2013 Hewlett-Packard Development Company, L.P.
# All Rights Reserved.
#
# 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 inspect
import os
from oslo_log import log as logging
import oslo_messaging as messaging
from oslo_service import loopingcall
from oslo_service import service
from oslo_utils import importutils
from osprofiler import profiler
from trove.common import cfg
from trove.common import profile
from trove.common.rpc import secure_serializer as ssz
from trove import rpc
CONF = cfg.CONF
LOG = logging.getLogger(__name__)
class RpcService(service.Service):
def __init__(self, key, host=None, binary=None, topic=None, manager=None,
rpc_api_version=None, secure_serializer=ssz.SecureSerializer):
super(RpcService, self).__init__()
self.key = key
self.host = host or CONF.host
self.binary = binary or os.path.basename(inspect.stack()[-1][1])
self.topic = topic or self.binary.rpartition('trove-')[2]
_manager = importutils.import_object(manager)
self.manager_impl = profiler.trace_cls("rpc")(_manager)
self.rpc_api_version = rpc_api_version or \
self.manager_impl.RPC_API_VERSION
self.secure_serializer = secure_serializer
profile.setup_profiler(self.binary, self.host)
def start(self):
LOG.debug("Creating RPC server for service %s", self.topic)
target = messaging.Target(topic=self.topic, server=self.host,
version=self.rpc_api_version)
if not hasattr(self.manager_impl, 'target'):
self.manager_impl.target = target
endpoints = [self.manager_impl]
self.rpcserver = rpc.get_server(
target, endpoints, key=self.key,
secure_serializer=self.secure_serializer)
self.rpcserver.start()
# TODO(hub-cap): Currently the context is none... do we _need_ it here?
report_interval = CONF.report_interval
if report_interval > 0:
pulse = loopingcall.FixedIntervalLoopingCall(
self.manager_impl.run_periodic_tasks, context=None)
pulse.start(interval=report_interval,
initial_delay=report_interval)
pulse.wait()
def stop(self):
# Try to shut the connection down, but if we get any sort of
# errors, go ahead and ignore them.. as we're shutting down anyway
try:
self.rpcserver.stop()
except Exception:
LOG.info("Failed to stop RPC server before shutdown. ")
pass
super(RpcService, self).stop()
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