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
|
/*
*
* 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.protocol;
import org.apache.qpid.AMQException;
import org.apache.qpid.codec.AMQCodecFactory;
import org.apache.qpid.framing.*;
import org.apache.qpid.server.exchange.ExchangeRegistry;
import org.apache.qpid.server.queue.QueueRegistry;
import org.apache.qpid.server.registry.ApplicationRegistry;
import org.apache.qpid.server.registry.IApplicationRegistry;
import org.apache.qpid.server.transport.ConnectorConfiguration;
import org.apache.qpid.ssl.BogusSSLContextFactory;
import org.apache.log4j.Logger;
import org.apache.mina.common.ByteBuffer;
import org.apache.mina.common.IdleStatus;
import org.apache.mina.common.IoHandlerAdapter;
import org.apache.mina.common.IoSession;
import org.apache.mina.filter.SSLFilter;
import org.apache.mina.filter.codec.ProtocolCodecFilter;
import org.apache.mina.util.SessionUtil;
import java.io.IOException;
/**
* The protocol handler handles "protocol events" for all connections. The state
* associated with an individual connection is accessed through the protocol session.
*
* We delegate all frame (message) processing to the AMQProtocolSession which wraps
* the state for the connection.
*
*/
public class AMQPFastProtocolHandler extends IoHandlerAdapter implements ProtocolVersionList
{
private static final Logger _logger = Logger.getLogger(AMQPFastProtocolHandler.class);
/**
* The registry of all queues. This is passed to frame listeners when frame
* events occur.
*/
private final QueueRegistry _queueRegistry;
/**
* The registry of all exchanges. This is passed to frame listeners when frame
* events occur.
*/
private final ExchangeRegistry _exchangeRegistry;
private boolean _useSSL;
public AMQPFastProtocolHandler(Integer applicationRegistryInstance)
{
IApplicationRegistry registry = ApplicationRegistry.getInstance(applicationRegistryInstance);
_queueRegistry = registry.getQueueRegistry();
_exchangeRegistry = registry.getExchangeRegistry();
_logger.debug("AMQPFastProtocolHandler created");
}
public AMQPFastProtocolHandler(QueueRegistry queueRegistry,
ExchangeRegistry exchangeRegistry)
{
_queueRegistry = queueRegistry;
_exchangeRegistry = exchangeRegistry;
_logger.debug("AMQPFastProtocolHandler created");
}
protected AMQPFastProtocolHandler(AMQPFastProtocolHandler handler)
{
this(handler._queueRegistry, handler._exchangeRegistry);
}
public void sessionCreated(IoSession protocolSession) throws Exception
{
SessionUtil.initialize(protocolSession);
final AMQCodecFactory codecFactory = new AMQCodecFactory(true);
createSession(protocolSession, _queueRegistry, _exchangeRegistry, codecFactory);
_logger.info("Protocol session created");
final ProtocolCodecFilter pcf = new ProtocolCodecFilter(codecFactory);
ConnectorConfiguration connectorConfig = ApplicationRegistry.getInstance().
getConfiguredObject(ConnectorConfiguration.class);
if (connectorConfig.enableExecutorPool)
{
if (_useSSL)
{
protocolSession.getFilterChain().addAfter("AsynchronousReadFilter", "sslFilter",
new SSLFilter(BogusSSLContextFactory.getInstance(true)));
}
protocolSession.getFilterChain().addBefore("AsynchronousWriteFilter", "protocolFilter", pcf);
}
else
{
protocolSession.getFilterChain().addLast("protocolFilter", pcf);
}
}
/**
* Separated into its own, protected, method to allow easier reuse
*/
protected void createSession(IoSession session, QueueRegistry queues, ExchangeRegistry exchanges, AMQCodecFactory codec) throws AMQException
{
new AMQMinaProtocolSession(session, queues, exchanges, codec);
}
public void sessionOpened(IoSession protocolSession) throws Exception
{
_logger.info("Session opened");
}
public void sessionClosed(IoSession protocolSession) throws Exception
{
_logger.info("Protocol Session closed");
final AMQProtocolSession amqProtocolSession = AMQMinaProtocolSession.getAMQProtocolSession(protocolSession);
amqProtocolSession.closeSession();
}
public void sessionIdle(IoSession session, IdleStatus status) throws Exception
{
_logger.debug("Protocol Session [" + this + "] idle: " + status);
if(IdleStatus.WRITER_IDLE.equals(status))
{
//write heartbeat frame:
session.write(HeartbeatBody.FRAME);
}
else if(IdleStatus.READER_IDLE.equals(status))
{
//failover:
throw new IOException("Timed out while waiting for heartbeat from peer.");
}
}
public void exceptionCaught(IoSession protocolSession, Throwable throwable) throws Exception
{
AMQProtocolSession session = AMQMinaProtocolSession.getAMQProtocolSession(protocolSession);
if (throwable instanceof AMQProtocolHeaderException)
{
/* Find last protocol version in protocol version list. Make sure last protocol version
listed in the build file (build-module.xml) is the latest version which will be returned
here. */
int i = pv.length - 1;
protocolSession.write(new ProtocolInitiation(pv[i][PROTOCOL_MAJOR], pv[i][PROTOCOL_MINOR]));
protocolSession.close();
_logger.error("Error in protocol initiation " + session + ": " + throwable.getMessage(), throwable);
}
else if(throwable instanceof IOException)
{
_logger.error("IOException caught in" + session + ", session closed implictly: " + throwable, throwable);
}
else
{
protocolSession.write(ConnectionCloseBody.createAMQFrame(0, 200, throwable.getMessage(), 0, 0));
_logger.error("Exception caught in" + session + ", closing session explictly: " + throwable, throwable);
protocolSession.close();
}
}
/**
* Invoked when a message is received on a particular protocol session. Note that a
* protocol session is directly tied to a particular physical connection.
* @param protocolSession the protocol session that received the message
* @param message the message itself (i.e. a decoded frame)
* @throws Exception if the message cannot be processed
*/
public void messageReceived(IoSession protocolSession, Object message) throws Exception
{
final AMQProtocolSession amqProtocolSession = AMQMinaProtocolSession.getAMQProtocolSession(protocolSession);
if (message instanceof AMQDataBlock)
{
amqProtocolSession.dataBlockReceived((AMQDataBlock) message);
}
else if (message instanceof ByteBuffer)
{
throw new IllegalStateException("Handed undecoded ByteBuffer buf = " + message);
}
else
{
throw new IllegalStateException("Handed unhandled message. message.class = " + message.getClass() + " message = " + message);
}
}
/**
* Called after a message has been sent out on a particular protocol session
* @param protocolSession the protocol session (i.e. connection) on which this
* message was sent
* @param object the message (frame) that was encoded and sent
* @throws Exception if we want to indicate an error
*/
public void messageSent(IoSession protocolSession, Object object) throws Exception
{
if (_logger.isDebugEnabled())
{
_logger.debug("Message sent: " + object);
}
}
public boolean isUseSSL()
{
return _useSSL;
}
public void setUseSSL(boolean useSSL)
{
_useSSL = useSSL;
}
}
|
