1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
|
#
# 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.
#
from qpid.client import Client, Closed
from qpid.queue import Empty
from qpid.content import Content
from qpid.testlib import testrunner, TestBase
class AlternateExchangeTests(TestBase):
"""
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
"""
channel = self.channel
#create an exchange with an alternate defined
channel.exchange_declare(exchange="secondary", type="fanout")
channel.exchange_declare(exchange="primary", type="direct", alternate_exchange="secondary")
#declare, bind (to the alternate exchange) and consume from a queue for 'returned' messages
channel.queue_declare(queue="returns", exclusive=True, auto_delete=True)
channel.queue_bind(queue="returns", exchange="secondary")
self.subscribe(destination="a", queue="returns")
returned = self.client.queue("a")
#declare, bind (to the primary exchange) and consume from a queue for 'processed' messages
channel.queue_declare(queue="processed", exclusive=True, auto_delete=True)
channel.queue_bind(queue="processed", exchange="primary", routing_key="my-key")
self.subscribe(destination="b", queue="processed")
processed = self.client.queue("b")
#publish to the primary exchange
#...one message that makes it to the 'processed' queue:
channel.message_transfer(destination="primary", content=Content("Good", properties={'routing_key':"my-key"}))
#...and one that does not:
channel.message_transfer(destination="primary", content=Content("Bad", properties={'routing_key':"unused-key"}))
#delete the exchanges
channel.exchange_delete(exchange="primary")
channel.exchange_delete(exchange="secondary")
#verify behaviour
self.assertEqual("Good", processed.get(timeout=1).content.body)
self.assertEqual("Bad", returned.get(timeout=1).content.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
"""
channel = self.channel
#set up a 'dead letter queue':
channel.exchange_declare(exchange="dlq", type="fanout")
channel.queue_declare(queue="deleted", exclusive=True, auto_delete=True)
channel.queue_bind(exchange="dlq", queue="deleted")
self.subscribe(destination="dlq", queue="deleted")
dlq = self.client.queue("dlq")
#create a queue using the dlq as its alternate exchange:
channel.queue_declare(queue="delete-me", alternate_exchange="dlq")
#send it some messages:
channel.message_transfer(content=Content("One", properties={'routing_key':"delete-me"}))
channel.message_transfer(content=Content("Two", properties={'routing_key':"delete-me"}))
channel.message_transfer(content=Content("Three", properties={'routing_key':"delete-me"}))
#delete it:
channel.queue_delete(queue="delete-me")
#delete the dlq exchange:
channel.exchange_delete(exchange="dlq")
#check the messages were delivered to the dlq:
self.assertEqual("One", dlq.get(timeout=1).content.body)
self.assertEqual("Two", dlq.get(timeout=1).content.body)
self.assertEqual("Three", dlq.get(timeout=1).content.body)
self.assertEmpty(dlq)
def test_immediate(self):
"""
Test that messages in a queue being deleted are delivered to the alternate-exchange if specified
"""
channel = self.channel
#set up a 'dead letter queue':
channel.exchange_declare(exchange="dlq", type="fanout")
channel.queue_declare(queue="immediate", exclusive=True, auto_delete=True)
channel.queue_bind(exchange="dlq", queue="immediate")
self.subscribe(destination="dlq", queue="immediate")
dlq = self.client.queue("dlq")
#create a queue using the dlq as its alternate exchange:
channel.queue_declare(queue="no-consumers", alternate_exchange="dlq", exclusive=True, auto_delete=True)
#send it some messages:
#TODO: WE HAVE LOST THE IMMEDIATE FLAG; FIX THIS ONCE ITS BACK
channel.message_transfer(content=Content("no one wants me", properties={'routing_key':"no-consumers"}))
#check the messages were delivered to the dlq:
self.assertEqual("no one wants me", dlq.get(timeout=1).content.body)
self.assertEmpty(dlq)
#cleanup:
channel.queue_delete(queue="no-consumers")
channel.exchange_delete(exchange="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
"""
channel = self.channel
channel.exchange_declare(exchange="alternate", type="fanout")
channel.queue_declare(queue="q", exclusive=True, auto_delete=True, alternate_exchange="alternate")
try:
channel.exchange_delete(exchange="alternate")
self.fail("Expected deletion of in-use alternate-exchange to fail")
except Closed, e:
#cleanup:
other = self.connect()
channel = other.channel(1)
channel.session_open()
channel.exchange_delete(exchange="alternate")
channel.session_close()
other.close()
self.assertConnectionException(530, e.args[0])
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
"""
channel = self.channel
channel.exchange_declare(exchange="alternate", type="fanout")
channel.exchange_declare(exchange="e", type="fanout", alternate_exchange="alternate")
try:
channel.exchange_delete(exchange="alternate")
#cleanup:
channel.exchange_delete(exchange="e")
self.fail("Expected deletion of in-use alternate-exchange to fail")
except Closed, e:
#cleanup:
other = self.connect()
channel = other.channel(1)
channel.session_open()
channel.exchange_delete(exchange="e")
channel.exchange_delete(exchange="alternate")
channel.session_close()
other.close()
self.assertConnectionException(530, e.args[0])
def assertEmpty(self, queue):
try:
msg = queue.get(timeout=1)
self.fail("Queue not empty: " + msg)
except Empty: None
|
