86e5737bf6
The dispatcher is now responsible to configure and to get the listener from the transport. The server just ask to the dispatcher to build and return a configured listener for a provider transport. Partial implements blueprint notification-subscriber-server Change-Id: I4a6d9620b8239f6d377bc5788b8a90a860b2f02c
484 lines
17 KiB
Python
484 lines
17 KiB
Python
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# Copyright 2013 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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import threading
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from oslo.config import cfg
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import testscenarios
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from oslo import messaging
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from tests import utils as test_utils
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load_tests = testscenarios.load_tests_apply_scenarios
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class ServerSetupMixin(object):
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class Server(object):
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def __init__(self, transport, topic, server, endpoint, serializer):
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target = messaging.Target(topic=topic, server=server)
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self._server = messaging.get_rpc_server(transport,
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target,
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[endpoint, self],
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serializer=serializer)
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def stop(self, ctxt):
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# Check start() does nothing with a running server
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self._server.start()
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self._server.stop()
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self._server.wait()
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def start(self):
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self._server.start()
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class TestSerializer(object):
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def serialize_entity(self, ctxt, entity):
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return ('s' + entity) if entity else entity
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def deserialize_entity(self, ctxt, entity):
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return ('d' + entity) if entity else entity
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def serialize_context(self, ctxt):
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return dict([(k, 's' + v) for k, v in ctxt.items()])
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def deserialize_context(self, ctxt):
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return dict([(k, 'd' + v) for k, v in ctxt.items()])
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def __init__(self):
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self.serializer = self.TestSerializer()
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def _setup_server(self, transport, endpoint, topic=None, server=None):
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server = self.Server(transport,
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topic=topic or 'testtopic',
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server=server or 'testserver',
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endpoint=endpoint,
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serializer=self.serializer)
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thread = threading.Thread(target=server.start)
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thread.daemon = True
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thread.start()
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return thread
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def _stop_server(self, client, server_thread, topic=None):
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if topic is not None:
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client = client.prepare(topic=topic)
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client.cast({}, 'stop')
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server_thread.join(timeout=30)
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def _setup_client(self, transport, topic='testtopic'):
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return messaging.RPCClient(transport,
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messaging.Target(topic=topic),
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serializer=self.serializer)
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class TestRPCServer(test_utils.BaseTestCase, ServerSetupMixin):
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def __init__(self, *args):
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super(TestRPCServer, self).__init__(*args)
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ServerSetupMixin.__init__(self)
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def setUp(self):
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super(TestRPCServer, self).setUp(conf=cfg.ConfigOpts())
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def test_constructor(self):
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transport = messaging.get_transport(self.conf, url='fake:')
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target = messaging.Target(topic='foo', server='bar')
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endpoints = [object()]
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serializer = object()
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server = messaging.get_rpc_server(transport, target, endpoints,
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serializer=serializer)
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self.assertIs(server.conf, self.conf)
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self.assertIs(server.transport, transport)
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self.assertIsInstance(server.dispatcher, messaging.RPCDispatcher)
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self.assertIs(server.dispatcher.endpoints, endpoints)
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self.assertIs(server.dispatcher.serializer, serializer)
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self.assertIs(server.executor, 'blocking')
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def test_no_target_server(self):
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transport = messaging.get_transport(self.conf, url='fake:')
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server = messaging.get_rpc_server(transport,
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messaging.Target(topic='testtopic'),
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[])
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try:
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server.start()
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except Exception as ex:
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self.assertIsInstance(ex, messaging.InvalidTarget, ex)
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self.assertEqual(ex.target.topic, 'testtopic')
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else:
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self.assertTrue(False)
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def test_no_server_topic(self):
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transport = messaging.get_transport(self.conf, url='fake:')
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target = messaging.Target(server='testserver')
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server = messaging.get_rpc_server(transport, target, [])
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try:
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server.start()
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except Exception as ex:
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self.assertIsInstance(ex, messaging.InvalidTarget, ex)
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self.assertEqual(ex.target.server, 'testserver')
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else:
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self.assertTrue(False)
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def _test_no_client_topic(self, call=True):
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transport = messaging.get_transport(self.conf, url='fake:')
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client = self._setup_client(transport, topic=None)
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method = client.call if call else client.cast
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try:
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method({}, 'ping', arg='foo')
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except Exception as ex:
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self.assertIsInstance(ex, messaging.InvalidTarget, ex)
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self.assertIsNotNone(ex.target)
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else:
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self.assertTrue(False)
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def test_no_client_topic_call(self):
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self._test_no_client_topic(call=True)
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def test_no_client_topic_cast(self):
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self._test_no_client_topic(call=False)
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def test_client_call_timeout(self):
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transport = messaging.get_transport(self.conf, url='fake:')
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finished = False
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wait = threading.Condition()
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class TestEndpoint(object):
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def ping(self, ctxt, arg):
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with wait:
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if not finished:
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wait.wait()
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server_thread = self._setup_server(transport, TestEndpoint())
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client = self._setup_client(transport)
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try:
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client.prepare(timeout=0).call({}, 'ping', arg='foo')
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except Exception as ex:
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self.assertIsInstance(ex, messaging.MessagingTimeout, ex)
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else:
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self.assertTrue(False)
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with wait:
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finished = True
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wait.notify()
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self._stop_server(client, server_thread)
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def test_unknown_executor(self):
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transport = messaging.get_transport(self.conf, url='fake:')
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try:
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messaging.get_rpc_server(transport, None, [], executor='foo')
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except Exception as ex:
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self.assertIsInstance(ex, messaging.ExecutorLoadFailure)
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self.assertEqual(ex.executor, 'foo')
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else:
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self.assertTrue(False)
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def test_cast(self):
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transport = messaging.get_transport(self.conf, url='fake:')
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class TestEndpoint(object):
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def __init__(self):
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self.pings = []
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def ping(self, ctxt, arg):
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self.pings.append(arg)
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endpoint = TestEndpoint()
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server_thread = self._setup_server(transport, endpoint)
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client = self._setup_client(transport)
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client.cast({}, 'ping', arg='foo')
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client.cast({}, 'ping', arg='bar')
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self._stop_server(client, server_thread)
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self.assertEqual(endpoint.pings, ['dsfoo', 'dsbar'])
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def test_call(self):
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transport = messaging.get_transport(self.conf, url='fake:')
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class TestEndpoint(object):
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def ping(self, ctxt, arg):
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return arg
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server_thread = self._setup_server(transport, TestEndpoint())
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client = self._setup_client(transport)
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self.assertIsNone(client.call({}, 'ping', arg=None))
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self.assertEqual(client.call({}, 'ping', arg=0), 0)
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self.assertEqual(client.call({}, 'ping', arg=False), False)
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self.assertEqual(client.call({}, 'ping', arg=[]), [])
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self.assertEqual(client.call({}, 'ping', arg={}), {})
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self.assertEqual(client.call({}, 'ping', arg='foo'), 'dsdsfoo')
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self._stop_server(client, server_thread)
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def test_direct_call(self):
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transport = messaging.get_transport(self.conf, url='fake:')
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class TestEndpoint(object):
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def ping(self, ctxt, arg):
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return arg
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server_thread = self._setup_server(transport, TestEndpoint())
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client = self._setup_client(transport)
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direct = client.prepare(server='testserver')
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self.assertIsNone(direct.call({}, 'ping', arg=None))
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self.assertEqual(client.call({}, 'ping', arg=0), 0)
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self.assertEqual(client.call({}, 'ping', arg=False), False)
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self.assertEqual(client.call({}, 'ping', arg=[]), [])
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self.assertEqual(client.call({}, 'ping', arg={}), {})
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self.assertEqual(direct.call({}, 'ping', arg='foo'), 'dsdsfoo')
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self._stop_server(client, server_thread)
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def test_context(self):
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transport = messaging.get_transport(self.conf, url='fake:')
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class TestEndpoint(object):
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def ctxt_check(self, ctxt, key):
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return ctxt[key]
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server_thread = self._setup_server(transport, TestEndpoint())
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client = self._setup_client(transport)
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self.assertEqual(client.call({'dsa': 'b'},
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'ctxt_check',
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key='a'),
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'dsdsb')
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self._stop_server(client, server_thread)
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def test_failure(self):
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transport = messaging.get_transport(self.conf, url='fake:')
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class TestEndpoint(object):
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def ping(self, ctxt, arg):
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raise ValueError(arg)
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server_thread = self._setup_server(transport, TestEndpoint())
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client = self._setup_client(transport)
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try:
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client.call({}, 'ping', arg='foo')
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except Exception as ex:
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self.assertIsInstance(ex, ValueError)
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self.assertEqual(ex[0], 'dsfoo')
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else:
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self.assertTrue(False)
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self._stop_server(client, server_thread)
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def test_expected_failure(self):
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transport = messaging.get_transport(self.conf, url='fake:')
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class TestEndpoint(object):
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@messaging.expected_exceptions(ValueError)
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def ping(self, ctxt, arg):
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raise ValueError(arg)
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server_thread = self._setup_server(transport, TestEndpoint())
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client = self._setup_client(transport)
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try:
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client.call({}, 'ping', arg='foo')
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except Exception as ex:
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self.assertIsInstance(ex, ValueError)
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self.assertEqual(ex[0], 'dsfoo')
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else:
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self.assertTrue(False)
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self._stop_server(client, server_thread)
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class TestMultipleServers(test_utils.BaseTestCase, ServerSetupMixin):
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_exchanges = [
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('same_exchange', dict(exchange1=None, exchange2=None)),
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('diff_exchange', dict(exchange1='x1', exchange2='x2')),
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]
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_topics = [
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('same_topic', dict(topic1='t', topic2='t')),
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('diff_topic', dict(topic1='t1', topic2='t2')),
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]
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_server = [
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('same_server', dict(server1=None, server2=None)),
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('diff_server', dict(server1='s1', server2='s2')),
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]
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_fanout = [
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('not_fanout', dict(fanout1=None, fanout2=None)),
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('fanout', dict(fanout1=True, fanout2=True)),
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]
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_method = [
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('call', dict(call1=True, call2=True)),
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('cast', dict(call1=False, call2=False)),
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]
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_endpoints = [
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('one_endpoint',
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dict(multi_endpoints=False,
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expect1=['ds1', 'ds2'],
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expect2=['ds1', 'ds2'])),
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('two_endpoints',
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dict(multi_endpoints=True,
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expect1=['ds1'],
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expect2=['ds2'])),
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]
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@classmethod
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def generate_scenarios(cls):
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cls.scenarios = testscenarios.multiply_scenarios(cls._exchanges,
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cls._topics,
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cls._server,
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cls._fanout,
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cls._method,
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cls._endpoints)
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# fanout call not supported
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def filter_fanout_call(scenario):
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params = scenario[1]
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fanout = params['fanout1'] or params['fanout2']
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call = params['call1'] or params['call2']
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return not (call and fanout)
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# listening multiple times on same topic/server pair not supported
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def filter_same_topic_and_server(scenario):
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params = scenario[1]
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single_topic = params['topic1'] == params['topic2']
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single_server = params['server1'] == params['server2']
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return not (single_topic and single_server)
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# fanout to multiple servers on same topic and exchange
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# each endpoint will receive both messages
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def fanout_to_servers(scenario):
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params = scenario[1]
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fanout = params['fanout1'] or params['fanout2']
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single_exchange = params['exchange1'] == params['exchange2']
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single_topic = params['topic1'] == params['topic2']
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multi_servers = params['server1'] != params['server2']
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if fanout and single_exchange and single_topic and multi_servers:
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params['expect1'] = params['expect1'][:] + params['expect1']
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params['expect2'] = params['expect2'][:] + params['expect2']
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return scenario
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# multiple endpoints on same topic and exchange
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# either endpoint can get either message
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def single_topic_multi_endpoints(scenario):
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params = scenario[1]
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single_exchange = params['exchange1'] == params['exchange2']
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single_topic = params['topic1'] == params['topic2']
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if single_topic and single_exchange and params['multi_endpoints']:
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params['expect_either'] = (params['expect1'] +
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params['expect2'])
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params['expect1'] = params['expect2'] = []
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else:
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params['expect_either'] = []
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return scenario
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for f in [filter_fanout_call, filter_same_topic_and_server]:
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cls.scenarios = filter(f, cls.scenarios)
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for m in [fanout_to_servers, single_topic_multi_endpoints]:
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cls.scenarios = map(m, cls.scenarios)
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def __init__(self, *args):
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super(TestMultipleServers, self).__init__(*args)
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ServerSetupMixin.__init__(self)
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def setUp(self):
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super(TestMultipleServers, self).setUp(conf=cfg.ConfigOpts())
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def test_multiple_servers(self):
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url1 = 'fake:///' + (self.exchange1 or '')
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url2 = 'fake:///' + (self.exchange2 or '')
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transport1 = messaging.get_transport(self.conf, url=url1)
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if url1 != url2:
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transport2 = messaging.get_transport(self.conf, url=url1)
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else:
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transport2 = transport1
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class TestEndpoint(object):
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def __init__(self):
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self.pings = []
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def ping(self, ctxt, arg):
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self.pings.append(arg)
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def alive(self, ctxt):
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return 'alive'
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if self.multi_endpoints:
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endpoint1, endpoint2 = TestEndpoint(), TestEndpoint()
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else:
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endpoint1 = endpoint2 = TestEndpoint()
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thread1 = self._setup_server(transport1, endpoint1,
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topic=self.topic1, server=self.server1)
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thread2 = self._setup_server(transport2, endpoint2,
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topic=self.topic2, server=self.server2)
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client1 = self._setup_client(transport1, topic=self.topic1)
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client2 = self._setup_client(transport2, topic=self.topic2)
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client1 = client1.prepare(server=self.server1)
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client2 = client2.prepare(server=self.server2)
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if self.fanout1:
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client1.call({}, 'alive')
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client1 = client1.prepare(fanout=True)
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if self.fanout2:
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client2.call({}, 'alive')
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client2 = client2.prepare(fanout=True)
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(client1.call if self.call1 else client1.cast)({}, 'ping', arg='1')
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(client2.call if self.call2 else client2.cast)({}, 'ping', arg='2')
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self.assertTrue(thread1.isAlive())
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self._stop_server(client1.prepare(fanout=None),
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thread1, topic=self.topic1)
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self.assertTrue(thread2.isAlive())
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self._stop_server(client2.prepare(fanout=None),
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thread2, topic=self.topic2)
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def check(pings, expect):
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self.assertEqual(len(pings), len(expect))
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for a in expect:
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self.assertIn(a, pings)
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if self.expect_either:
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check(endpoint1.pings + endpoint2.pings, self.expect_either)
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else:
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check(endpoint1.pings, self.expect1)
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check(endpoint2.pings, self.expect2)
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TestMultipleServers.generate_scenarios()
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