| # |
| # Licensed to the Apache Software Foundation (ASF) under one |
| # or more contributor license agreements. See the NOTICE file |
| # distributed with this work for additional information |
| # regarding copyright ownership. The ASF licenses this file |
| # to you 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 traceback |
| from qpid.queue import Empty |
| from qpid.datatypes import Message |
| from qpid.testlib import TestBase010 |
| from qpid.session import SessionException |
| |
| class AlternateExchangeTests(TestBase010): |
| """ |
| Tests for the new mechanism for message returns introduced in 0-10 |
| and available in 0-9 for preview |
| """ |
| |
| def test_unroutable(self): |
| """ |
| Test that unroutable messages are delivered to the alternate-exchange if specified |
| """ |
| session = self.session |
| #create an exchange with an alternate defined |
| session.exchange_declare(exchange="secondary", type="fanout") |
| session.exchange_declare(exchange="primary", type="direct", alternate_exchange="secondary") |
| |
| #declare, bind (to the alternate exchange) and consume from a queue for 'returned' messages |
| session.queue_declare(queue="returns", exclusive=True, auto_delete=True) |
| session.exchange_bind(queue="returns", exchange="secondary") |
| session.message_subscribe(destination="a", queue="returns") |
| session.message_flow(destination="a", unit=session.credit_unit.message, value=0xFFFFFFFF) |
| session.message_flow(destination="a", unit=session.credit_unit.byte, value=0xFFFFFFFF) |
| returned = session.incoming("a") |
| |
| #declare, bind (to the primary exchange) and consume from a queue for 'processed' messages |
| session.queue_declare(queue="processed", exclusive=True, auto_delete=True) |
| session.exchange_bind(queue="processed", exchange="primary", binding_key="my-key") |
| session.message_subscribe(destination="b", queue="processed") |
| session.message_flow(destination="b", unit=session.credit_unit.message, value=0xFFFFFFFF) |
| session.message_flow(destination="b", unit=session.credit_unit.byte, value=0xFFFFFFFF) |
| processed = session.incoming("b") |
| |
| #publish to the primary exchange |
| #...one message that makes it to the 'processed' queue: |
| dp=self.session.delivery_properties(routing_key="my-key") |
| session.message_transfer(destination="primary", message=Message(dp, "Good")) |
| #...and one that does not: |
| dp=self.session.delivery_properties(routing_key="unused-key") |
| session.message_transfer(destination="primary", message=Message(dp, "Bad")) |
| |
| #delete the exchanges |
| session.exchange_delete(exchange="primary") |
| session.exchange_delete(exchange="secondary") |
| |
| #verify behaviour |
| self.assertEqual("Good", processed.get(timeout=1).body) |
| self.assertEqual("Bad", returned.get(timeout=1).body) |
| self.assertEmpty(processed) |
| self.assertEmpty(returned) |
| |
| def test_queue_delete(self): |
| """ |
| Test that messages in a queue being deleted are delivered to the alternate-exchange if specified |
| """ |
| session = self.session |
| #set up a 'dead letter queue': |
| session.exchange_declare(exchange="dlq", type="fanout") |
| session.queue_declare(queue="deleted", exclusive=True, auto_delete=True) |
| session.exchange_bind(exchange="dlq", queue="deleted") |
| session.message_subscribe(destination="dlq", queue="deleted") |
| session.message_flow(destination="dlq", unit=session.credit_unit.message, value=0xFFFFFFFF) |
| session.message_flow(destination="dlq", unit=session.credit_unit.byte, value=0xFFFFFFFF) |
| dlq = session.incoming("dlq") |
| |
| #create a queue using the dlq as its alternate exchange: |
| session.queue_declare(queue="delete-me", alternate_exchange="dlq") |
| #send it some messages: |
| dp=self.session.delivery_properties(routing_key="delete-me") |
| session.message_transfer(message=Message(dp, "One")) |
| session.message_transfer(message=Message(dp, "Two")) |
| session.message_transfer(message=Message(dp, "Three")) |
| #delete it: |
| session.queue_delete(queue="delete-me") |
| #delete the dlq exchange: |
| session.exchange_delete(exchange="dlq") |
| |
| #check the messages were delivered to the dlq: |
| self.assertEqual("One", dlq.get(timeout=1).body) |
| self.assertEqual("Two", dlq.get(timeout=1).body) |
| self.assertEqual("Three", dlq.get(timeout=1).body) |
| self.assertEmpty(dlq) |
| |
| def test_delete_while_used_by_queue(self): |
| """ |
| Ensure an exchange still in use as an alternate-exchange for a |
| queue can't be deleted |
| """ |
| session = self.session |
| session.exchange_declare(exchange="alternate", type="fanout") |
| |
| session2 = self.conn.session("alternate", 2) |
| session2.queue_declare(queue="q", alternate_exchange="alternate") |
| try: |
| session2.exchange_delete(exchange="alternate") |
| self.fail("Expected deletion of in-use alternate-exchange to fail") |
| except SessionException, e: |
| session = self.session |
| session.queue_delete(queue="q") |
| session.exchange_delete(exchange="alternate") |
| self.assertEquals(530, e.args[0].error_code) |
| |
| |
| def test_delete_while_used_by_exchange(self): |
| """ |
| Ensure an exchange still in use as an alternate-exchange for |
| another exchange can't be deleted |
| """ |
| session = self.session |
| session.exchange_declare(exchange="alternate", type="fanout") |
| |
| session = self.conn.session("alternate", 2) |
| session.exchange_declare(exchange="e", type="fanout", alternate_exchange="alternate") |
| try: |
| session.exchange_delete(exchange="alternate") |
| self.fail("Expected deletion of in-use alternate-exchange to fail") |
| except SessionException, e: |
| session = self.session |
| session.exchange_delete(exchange="e") |
| session.exchange_delete(exchange="alternate") |
| self.assertEquals(530, e.args[0].error_code) |
| |
| |
| def assertEmpty(self, queue): |
| try: |
| msg = queue.get(timeout=1) |
| self.fail("Queue not empty: " + msg) |
| except Empty: None |