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# vim: tabstop=4 shiftwidth=4 softtabstop=4
# Copyright 2010 United States Government as represented by the
# Administrator of the National Aeronautics and Space Administration.
# 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.
"""
Unit Tests for AMQP-based remote procedure calls
"""
import logging
from eventlet import greenthread
from oslo.config import cfg
from openstack.common import jsonutils
from openstack.common.rpc import amqp as rpc_amqp
from openstack.common.rpc import common as rpc_common
from tests.unit.rpc import common
FLAGS = cfg.CONF
LOG = logging.getLogger(__name__)
class BaseRpcAMQPTestCase(common.BaseRpcTestCase):
"""Base test class for all AMQP-based RPC tests."""
def test_proxycallback_handles_exceptions(self):
"""Make sure exceptions unpacking messages don't cause hangs."""
if not self.rpc:
self.skipTest('rpc driver not available.')
orig_unpack = rpc_amqp.unpack_context
info = {'unpacked': False}
def fake_unpack_context(*args, **kwargs):
info['unpacked'] = True
raise Exception('moo')
self.stubs.Set(rpc_amqp, 'unpack_context', fake_unpack_context)
value = 41
self.rpc.cast(FLAGS, self.context, self.topic,
{"method": "echo", "args": {"value": value}})
# Wait for the cast to complete.
for x in range(50):
if info['unpacked']:
break
greenthread.sleep(0.1)
else:
self.fail("Timeout waiting for message to be consumed")
# Now see if we get a response even though we raised an
# exception for the cast above.
self.stubs.Set(rpc_amqp, 'unpack_context', orig_unpack)
value = 42
result = self.rpc.call(FLAGS, self.context, self.topic,
{"method": "echo",
"args": {"value": value}})
self.assertEqual(value, result)
def test_notification_envelope(self):
raw_msg = {'a': 'b'}
self.test_msg = None
def fake_notify_send(_conn, topic, msg):
self.test_msg = msg
def remove_unique_id(msg):
oslo_msg = jsonutils.loads(msg['oslo.message'])
oslo_msg.pop('_unique_id')
msg['oslo.message'] = jsonutils.dumps(oslo_msg)
self.stubs.Set(self.rpc.Connection, 'notify_send', fake_notify_send)
self.rpc.notify(FLAGS, self.context, 'notifications.info', raw_msg,
envelope=False)
self.assertEqual(self.test_msg, raw_msg)
# Now turn it on for notifications
self.rpc.notify(FLAGS, self.context, 'notifications.info', raw_msg,
envelope=True)
# Make sure the msg envelope was applied
self.assertTrue('oslo.version' in self.test_msg)
def test_single_reply_queue_caller_on(
self, single_reply_queue_for_callee_off=False):
if not self.rpc:
self.skipTest('rpc driver not available.')
self.orig_unpack_context = rpc_amqp.unpack_context
def my_unpack_context(conf, msg):
self.assertTrue('_reply_q' in msg)
if single_reply_queue_for_callee_off:
# Simulate a downlevel RPC callee by removing the reply_q.
# This will make the callee think it got a request
# from a downlevel caller and thus respond in a downlevel
# way. In fact we are testing an uplevel caller.
msg.pop('_reply_q')
return self.orig_unpack_context(conf, msg)
self.stubs.Set(rpc_amqp, 'unpack_context', my_unpack_context)
self.ReplyProxy_was_called = False
class MyReplyProxy(rpc_amqp.ReplyProxy):
def _process_data(myself, message_data):
#with open('mylog', 'a') as f:
# f.write('my_process_data: ' + str(message_data) + '\n')
self.assertTrue('_msg_id' in message_data)
self.ReplyProxy_was_called = True
super(MyReplyProxy, myself)._process_data(message_data)
self.orig_reply_proxy = self.conn.pool.reply_proxy
self.conn.pool.reply_proxy = MyReplyProxy(FLAGS, self.conn.pool)
value = 42
result = None
try:
result = self.rpc.call(
FLAGS, self.context, self.topic,
{"method": "echo", "args": {"value": value}},
timeout=1)
except rpc_common.Timeout:
# expect a timeout in this case
if single_reply_queue_for_callee_off:
result = 42
self.assertEqual(value, result)
if single_reply_queue_for_callee_off:
self.assertFalse(self.ReplyProxy_was_called)
else:
self.assertTrue(self.ReplyProxy_was_called)
self.stubs.UnsetAll()
self.conn.pool.reply_proxy = self.orig_reply_proxy
def test_single_reply_queue_caller_on_callee_off(self):
self.test_single_reply_queue_caller_on(
single_reply_queue_for_callee_off=True)
def test_duplicate_message_check(self):
"""Test sending *not-dict* to a topic exchange/queue."""
conn = self.rpc.create_connection(FLAGS)
message = {'args': 'topic test message', '_unique_id': 'aaaabbbbcccc'}
self.received_message = None
cache = rpc_amqp._MsgIdCache()
self.exc_raised = False
def _callback(message):
try:
cache.check_duplicate_message(message)
except rpc_common.DuplicateMessageError:
self.exc_raised = True
conn.declare_topic_consumer('a_topic', _callback)
conn.topic_send('a_topic', rpc_common.serialize_msg(message))
conn.topic_send('a_topic', rpc_common.serialize_msg(message))
conn.consume(limit=2)
conn.close()
self.assertTrue(self.exc_raised)
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