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
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
|
/*
*
* 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.
*
*/
package org.apache.qpid.server.handler;
import java.util.UUID;
import java.util.Collections;
import java.util.concurrent.atomic.AtomicInteger;
import org.apache.log4j.Logger;
import org.apache.qpid.AMQException;
import org.apache.qpid.framing.AMQShortString;
import org.apache.qpid.framing.MethodRegistry;
import org.apache.qpid.framing.QueueDeclareBody;
import org.apache.qpid.framing.QueueDeclareOkBody;
import org.apache.qpid.protocol.AMQConstant;
import org.apache.qpid.server.AMQChannel;
import org.apache.qpid.server.exchange.Exchange;
import org.apache.qpid.server.exchange.ExchangeRegistry;
import org.apache.qpid.server.protocol.AMQProtocolSession;
import org.apache.qpid.server.protocol.AMQSessionModel;
import org.apache.qpid.server.queue.AMQQueue;
import org.apache.qpid.server.queue.AMQQueueFactory;
import org.apache.qpid.server.queue.QueueRegistry;
import org.apache.qpid.server.registry.ApplicationRegistry;
import org.apache.qpid.server.state.AMQStateManager;
import org.apache.qpid.server.state.StateAwareMethodListener;
import org.apache.qpid.server.store.DurableConfigurationStore;
import org.apache.qpid.server.virtualhost.VirtualHost;
public class QueueDeclareHandler implements StateAwareMethodListener<QueueDeclareBody>
{
private static final Logger _logger = Logger.getLogger(QueueDeclareHandler.class);
private static final QueueDeclareHandler _instance = new QueueDeclareHandler();
public static QueueDeclareHandler getInstance()
{
return _instance;
}
public boolean autoRegister = ApplicationRegistry.getInstance().getConfiguration().getQueueAutoRegister();
private final AtomicInteger _counter = new AtomicInteger();
public void methodReceived(AMQStateManager stateManager, QueueDeclareBody body, int channelId) throws AMQException
{
final AMQProtocolSession protocolConnection = stateManager.getProtocolSession();
final AMQSessionModel session = protocolConnection.getChannel(channelId);
VirtualHost virtualHost = protocolConnection.getVirtualHost();
ExchangeRegistry exchangeRegistry = virtualHost.getExchangeRegistry();
QueueRegistry queueRegistry = virtualHost.getQueueRegistry();
DurableConfigurationStore store = virtualHost.getDurableConfigurationStore();
final AMQShortString queueName;
// if we aren't given a queue name, we create one which we return to the client
if ((body.getQueue() == null) || (body.getQueue().length() == 0))
{
queueName = createName();
}
else
{
queueName = body.getQueue().intern();
}
AMQQueue queue;
//TODO: do we need to check that the queue already exists with exactly the same "configuration"?
synchronized (queueRegistry)
{
queue = queueRegistry.getQueue(queueName);
AMQSessionModel owningSession = null;
if (queue != null)
{
owningSession = queue.getExclusiveOwningSession();
}
if (queue == null)
{
if (body.getPassive())
{
String msg = "Queue: " + queueName + " not found on VirtualHost(" + virtualHost + ").";
throw body.getChannelException(AMQConstant.NOT_FOUND, msg);
}
else
{
queue = createQueue(queueName, body, virtualHost, protocolConnection);
queue.setPrincipalHolder(protocolConnection);
if (queue.isDurable() && !queue.isAutoDelete())
{
store.createQueue(queue, body.getArguments());
}
if(body.getAutoDelete())
{
queue.setDeleteOnNoConsumers(true);
}
queueRegistry.registerQueue(queue);
if (body.getExclusive())
{
queue.setExclusiveOwningSession(protocolConnection.getChannel(channelId));
queue.setPrincipalHolder(protocolConnection);
if(!body.getDurable())
{
final AMQQueue q = queue;
final AMQProtocolSession.Task sessionCloseTask = new AMQProtocolSession.Task()
{
public void doTask(AMQProtocolSession session) throws AMQException
{
q.setExclusiveOwningSession(null);
}
};
protocolConnection.addSessionCloseTask(sessionCloseTask);
queue.addQueueDeleteTask(new AMQQueue.Task() {
public void doTask(AMQQueue queue) throws AMQException
{
protocolConnection.removeSessionCloseTask(sessionCloseTask);
}
});
}
}
if (autoRegister)
{
Exchange defaultExchange = exchangeRegistry.getDefaultExchange();
virtualHost.getBindingFactory().addBinding(String.valueOf(queueName), queue, defaultExchange, Collections.EMPTY_MAP);
_logger.info("Queue " + queueName + " bound to default exchange(" + defaultExchange.getNameShortString() + ")");
}
}
}
else if (queue.isExclusive() && !queue.isDurable() && (owningSession == null || owningSession.getConnectionModel() != protocolConnection))
{
throw body.getConnectionException(AMQConstant.NOT_ALLOWED,
"Queue " + queue.getNameShortString() + " is exclusive, but not created on this Connection.");
}
else if(!body.getPassive() && ((queue.isExclusive()) != body.getExclusive()))
{
throw body.getChannelException(AMQConstant.ALREADY_EXISTS,
"Cannot re-declare queue '" + queue.getNameShortString() + "' with different exclusivity (was: "
+ queue.isExclusive() + " requested " + body.getExclusive() + ")");
}
else if (!body.getPassive() && body.getExclusive() && !(queue.isDurable() ? String.valueOf(queue.getOwner()).equals(session.getClientID()) : (owningSession == null || owningSession.getConnectionModel() == protocolConnection)))
{
throw body.getChannelException(AMQConstant.ALREADY_EXISTS, "Cannot declare queue('" + queueName + "'), "
+ "as exclusive queue with same name "
+ "declared on another client ID('"
+ queue.getOwner() + "') your clientID('" + session.getClientID() + "')");
}
else if(!body.getPassive() && queue.isAutoDelete() != body.getAutoDelete())
{
throw body.getChannelException(AMQConstant.ALREADY_EXISTS,
"Cannot re-declare queue '" + queue.getNameShortString() + "' with different auto-delete (was: "
+ queue.isAutoDelete() + " requested " + body.getAutoDelete() + ")");
}
else if(!body.getPassive() && queue.isDurable() != body.getDurable())
{
throw body.getChannelException(AMQConstant.ALREADY_EXISTS,
"Cannot re-declare queue '" + queue.getNameShortString() + "' with different durability (was: "
+ queue.isDurable() + " requested " + body.getDurable() + ")");
}
AMQChannel channel = protocolConnection.getChannel(channelId);
if (channel == null)
{
throw body.getChannelNotFoundException(channelId);
}
//set this as the default queue on the channel:
channel.setDefaultQueue(queue);
}
if (!body.getNowait())
{
MethodRegistry methodRegistry = protocolConnection.getMethodRegistry();
QueueDeclareOkBody responseBody =
methodRegistry.createQueueDeclareOkBody(queueName,
queue.getMessageCount(),
queue.getConsumerCount());
protocolConnection.writeFrame(responseBody.generateFrame(channelId));
_logger.info("Queue " + queueName + " declared successfully");
}
}
protected AMQShortString createName()
{
return new AMQShortString("tmp_" + UUID.randomUUID());
}
protected AMQQueue createQueue(final AMQShortString queueName,
QueueDeclareBody body,
VirtualHost virtualHost,
final AMQProtocolSession session)
throws AMQException
{
final QueueRegistry registry = virtualHost.getQueueRegistry();
AMQShortString owner = body.getExclusive() ? session.getContextKey() : null;
final AMQQueue queue = AMQQueueFactory.createAMQQueueImpl(queueName, body.getDurable(), owner, body.getAutoDelete(),
body.getExclusive(),virtualHost, body.getArguments());
if (body.getExclusive() && !body.getDurable())
{
final AMQProtocolSession.Task deleteQueueTask =
new AMQProtocolSession.Task()
{
public void doTask(AMQProtocolSession session) throws AMQException
{
if (registry.getQueue(queueName) == queue)
{
queue.delete();
}
}
};
session.addSessionCloseTask(deleteQueueTask);
queue.addQueueDeleteTask(new AMQQueue.Task()
{
public void doTask(AMQQueue queue)
{
session.removeSessionCloseTask(deleteQueueTask);
}
});
}
return queue;
}
}
|
