Add RPC support modules needed for conductor
Change-Id: I5cfad5c20cbe96268fee25c94e078a688373a700
This commit is contained in:
vinod pandarinathan
parent
a5f303b6f2
commit
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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 2012 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 oslo_config import cfg
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from cloudpulse.common import rpc
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from cloudpulse import version
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def parse_args(argv, default_config_files=None):
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rpc.set_defaults(control_exchange='cloudpulse')
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cfg.CONF(argv[1:],
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project='cloudpulse',
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version=version.version_info.release_string(),
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default_config_files=default_config_files)
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rpc.init(cfg.CONF)
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# Copyright 2014 Red Hat, Inc.
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# All Rights Reserved.
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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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__all__ = [
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'init',
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'cleanup',
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'set_defaults',
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'add_extra_exmods',
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'clear_extra_exmods',
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'get_allowed_exmods',
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'RequestContextSerializer',
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'get_client',
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'get_server',
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'get_notifier',
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'TRANSPORT_ALIASES',
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]
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from oslo_config import cfg
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import oslo_messaging as messaging
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from oslo_serialization import jsonutils
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from cloudpulse.common import context as cloudpulse_context
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from cloudpulse.common import exception
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CONF = cfg.CONF
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TRANSPORT = None
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NOTIFIER = None
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ALLOWED_EXMODS = [
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exception.__name__,
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]
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EXTRA_EXMODS = []
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# NOTE(lucasagomes): The cloudpulse.openstack.common.rpc entries are for
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# backwards compat with IceHouse rpc_backend configuration values.
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TRANSPORT_ALIASES = {
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'cloudpulse.openstack.common.rpc.impl_kombu': 'rabbit',
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'cloudpulse.openstack.common.rpc.impl_qpid': 'qpid',
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'cloudpulse.openstack.common.rpc.impl_zmq': 'zmq',
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'cloudpulse.rpc.impl_kombu': 'rabbit',
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'cloudpulse.rpc.impl_qpid': 'qpid',
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'cloudpulse.rpc.impl_zmq': 'zmq',
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}
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def init(conf):
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global TRANSPORT, NOTIFIER
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exmods = get_allowed_exmods()
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TRANSPORT = messaging.get_transport(conf,
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allowed_remote_exmods=exmods,
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aliases=TRANSPORT_ALIASES)
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serializer = RequestContextSerializer(JsonPayloadSerializer())
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NOTIFIER = messaging.Notifier(TRANSPORT, serializer=serializer)
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def cleanup():
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global TRANSPORT, NOTIFIER
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assert TRANSPORT is not None
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assert NOTIFIER is not None
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TRANSPORT.cleanup()
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TRANSPORT = NOTIFIER = None
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def set_defaults(control_exchange):
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messaging.set_transport_defaults(control_exchange)
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def add_extra_exmods(*args):
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EXTRA_EXMODS.extend(args)
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def clear_extra_exmods():
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del EXTRA_EXMODS[:]
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def get_allowed_exmods():
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return ALLOWED_EXMODS + EXTRA_EXMODS
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class JsonPayloadSerializer(messaging.NoOpSerializer):
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@staticmethod
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def serialize_entity(context, entity):
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return jsonutils.to_primitive(entity, convert_instances=True)
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class RequestContextSerializer(messaging.Serializer):
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def __init__(self, base):
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self._base = base
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def serialize_entity(self, context, entity):
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if not self._base:
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return entity
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return self._base.serialize_entity(context, entity)
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def deserialize_entity(self, context, entity):
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if not self._base:
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return entity
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return self._base.deserialize_entity(context, entity)
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def serialize_context(self, context):
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return context
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def deserialize_context(self, context):
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return cloudpulse_context.RequestContext.from_dict(context)
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def get_transport_url(url_str=None):
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return messaging.TransportURL.parse(CONF, url_str, TRANSPORT_ALIASES)
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def get_client(target, version_cap=None, serializer=None):
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assert TRANSPORT is not None
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serializer = RequestContextSerializer(serializer)
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return messaging.RPCClient(TRANSPORT,
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target,
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version_cap=version_cap,
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serializer=serializer)
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def get_server(target, endpoints, serializer=None):
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assert TRANSPORT is not None
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serializer = RequestContextSerializer(serializer)
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return messaging.get_rpc_server(TRANSPORT,
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target,
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endpoints,
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executor='eventlet',
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serializer=serializer)
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def get_notifier(service=None, host=None, publisher_id=None):
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assert NOTIFIER is not None
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if not publisher_id:
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publisher_id = "%s.%s" % (service, host or CONF.host)
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return NOTIFIER.prepare(publisher_id=publisher_id)
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@ -0,0 +1,108 @@
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# Copyright 2014 - Rackspace Hosting
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain 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,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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"""Common RPC service and API tools for Cloudpulse."""
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import eventlet
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from oslo_config import cfg
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import oslo_messaging as messaging
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from cloudpulse.common import context as cloudpulse_context
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from cloudpulse.common import rpc
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from cloudpulse.objects import base as objects_base
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# NOTE(paulczar):
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# Ubuntu 14.04 forces librabbitmq when kombu is used
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# Unfortunately it forces a version that has a crash
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# bug. Calling eventlet.monkey_patch() tells kombu
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# to use libamqp instead.
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eventlet.monkey_patch()
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# NOTE(asalkeld):
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# The cloudpulse.openstack.common.rpc entries are for compatibility
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# with devstack rpc_backend configuration values.
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TRANSPORT_ALIASES = {
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'cloudpulse.openstack.common.rpc.impl_kombu': 'rabbit',
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'cloudpulse.openstack.common.rpc.impl_qpid': 'qpid',
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'cloudpulse.openstack.common.rpc.impl_zmq': 'zmq',
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}
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class RequestContextSerializer(messaging.Serializer):
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def __init__(self, base):
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self._base = base
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def serialize_entity(self, context, entity):
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if not self._base:
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return entity
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return self._base.serialize_entity(context, entity)
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def deserialize_entity(self, context, entity):
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if not self._base:
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return entity
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return self._base.deserialize_entity(context, entity)
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def serialize_context(self, context):
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return context.to_dict()
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def deserialize_context(self, context):
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return cloudpulse_context.RequestContext.from_dict(context)
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class Service(object):
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_server = None
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def __init__(self, topic, server, handlers):
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serializer = RequestContextSerializer(
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objects_base.CloudpulseObjectSerializer())
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transport = messaging.get_transport(cfg.CONF,
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aliases=TRANSPORT_ALIASES)
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# TODO(asalkeld) add support for version='x.y'
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target = messaging.Target(topic=topic, server=server)
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self._server = messaging.get_rpc_server(transport, target, handlers,
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serializer=serializer)
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def serve(self):
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self._server.start()
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self._server.wait()
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class API(object):
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def __init__(self, transport=None, context=None, topic=None, server=None,
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timeout=None):
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serializer = RequestContextSerializer(
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objects_base.CloudpulseObjectSerializer())
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if transport is None:
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exmods = rpc.get_allowed_exmods()
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transport = messaging.get_transport(cfg.CONF,
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allowed_remote_exmods=exmods,
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aliases=TRANSPORT_ALIASES)
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self._context = context
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if topic is None:
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topic = ''
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target = messaging.Target(topic=topic, server=server)
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self._client = messaging.RPCClient(transport, target,
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serializer=serializer,
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timeout=timeout)
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def _call(self, method, *args, **kwargs):
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return self._client.call(self._context, method, *args, **kwargs)
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def _cast(self, method, *args, **kwargs):
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self._client.cast(self._context, method, *args, **kwargs)
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def echo(self, message):
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self._cast('echo', message=message)
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