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
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
|
/*
*
* 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.amqp_1_0.client.websocket;
import org.apache.qpid.amqp_1_0.client.ConnectionException;
import org.apache.qpid.amqp_1_0.client.TransportProvider;
import org.apache.qpid.amqp_1_0.codec.FrameWriter;
import org.apache.qpid.amqp_1_0.framing.AMQFrame;
import org.apache.qpid.amqp_1_0.framing.ConnectionHandler;
import org.apache.qpid.amqp_1_0.framing.ExceptionHandler;
import org.apache.qpid.amqp_1_0.transport.ConnectionEndpoint;
import org.apache.qpid.amqp_1_0.type.Binary;
import org.apache.qpid.amqp_1_0.type.FrameBody;
import org.apache.qpid.amqp_1_0.type.SaslFrameBody;
import org.eclipse.jetty.websocket.WebSocket;
import org.eclipse.jetty.websocket.WebSocketClient;
import org.eclipse.jetty.websocket.WebSocketClientFactory;
import java.io.IOException;
import java.net.URI;
import java.nio.ByteBuffer;
import java.util.concurrent.TimeUnit;
class WebSocketProvider implements TransportProvider
{
public static final String AMQP_WEBSOCKET_SUBPROTOCOL = "AMQPWSB10";
private static final byte AMQP_HEADER_FRAME_TYPE = (byte) 222;
private static int _connections;
private final String _transport;
private static WebSocketClientFactory _factory;
public WebSocketProvider(final String transport)
{
_transport = transport;
}
private static synchronized WebSocketClient createWebSocketClient() throws Exception
{
if(_factory == null)
{
_factory = new WebSocketClientFactory();
_factory.start();
}
_connections++;
return _factory.newWebSocketClient();
}
private static synchronized void removeClient() throws Exception
{
if(--_connections == 0)
{
_factory.stop();
_factory = null;
}
}
@Override
public void connect(final ConnectionEndpoint conn,
final String address,
final int port,
final boolean ssl,
final ExceptionHandler exceptionHandler) throws ConnectionException
{
try
{
WebSocketClient client = createWebSocketClient();
// Configure the client
client.setProtocol(AMQP_WEBSOCKET_SUBPROTOCOL);
ConnectionHandler.FrameOutput<FrameBody> out = new ConnectionHandler.FrameOutput<FrameBody>(conn);
final ConnectionHandler.FrameSource src;
if(conn.requiresSASL())
{
ConnectionHandler.FrameOutput<SaslFrameBody> saslOut = new ConnectionHandler.FrameOutput<SaslFrameBody>(conn);
src = new ConnectionHandler.SequentialFrameSource(new HeaderFrameSource((byte)'A',
(byte)'M',
(byte)'Q',
(byte)'P',
(byte)3,
(byte)1,
(byte)0,
(byte)0),
saslOut,
new HeaderFrameSource((byte)'A',
(byte)'M',
(byte)'Q',
(byte)'P',
(byte)0,
(byte)1,
(byte)0,
(byte)0),
out);
conn.setSaslFrameOutput(saslOut);
}
else
{
src = new ConnectionHandler.SequentialFrameSource(new HeaderFrameSource((byte)'A',
(byte)'M',
(byte)'Q',
(byte)'P',
(byte)0,
(byte)1,
(byte)0,
(byte)0),
out);
}
final ConnectionHandler handler = new ConnectionHandler(conn);
conn.setFrameOutputHandler(out);
final URI uri = new URI(_transport +"://"+ address+":"+ port +"/");
WebSocket.Connection connection = client.open(uri, new WebSocket.OnBinaryMessage()
{
public void onOpen(Connection connection)
{
Thread outputThread = new Thread(new FrameOutputThread(connection, src, conn, exceptionHandler));
outputThread.setDaemon(true);
outputThread.start();
}
public void onClose(int closeCode, String message)
{
conn.inputClosed();
}
@Override
public void onMessage(final byte[] data, final int offset, final int length)
{
handler.parse(ByteBuffer.wrap(data,offset,length).slice());
}
}).get(5, TimeUnit.SECONDS);
}
catch (Exception e)
{
throw new ConnectionException(e);
}
}
public static class HeaderFrameSource implements ConnectionHandler.FrameSource
{
private final ByteBuffer _buffer;
private boolean _closed;
public HeaderFrameSource(byte... headerBytes)
{
_buffer = ByteBuffer.wrap(headerBytes);
}
@Override
public AMQFrame getNextFrame(final boolean wait)
{
if(_closed)
{
return null;
}
else
{
_closed = true;
return new HeaderFrame(_buffer);
}
}
public boolean closed()
{
return _closed;
}
}
private static class HeaderFrame extends AMQFrame
{
public HeaderFrame(final ByteBuffer buffer)
{
super(null,buffer);
}
@Override
public short getChannel()
{
return 0;
}
@Override
public byte getFrameType()
{
return AMQP_HEADER_FRAME_TYPE;
}
}
private class FrameOutputThread implements Runnable
{
private final WebSocket.Connection _connection;
private final ConnectionHandler.FrameSource _frameSource;
private final ExceptionHandler _exceptionHandler;
private final FrameWriter _frameWriter;
private final byte[] _buffer;
public FrameOutputThread(final WebSocket.Connection connection,
final ConnectionHandler.FrameSource src,
final ConnectionEndpoint conn,
final ExceptionHandler exceptionHandler)
{
_connection = connection;
_frameSource = src;
_exceptionHandler = exceptionHandler;
_frameWriter = new FrameWriter(conn.getDescribedTypeRegistry());
_buffer = new byte[conn.getMaxFrameSize()];
}
@Override
public void run()
{
final FrameWriter frameWriter = _frameWriter;
final ByteBuffer buffer = ByteBuffer.wrap(_buffer);
try
{
while(_connection.isOpen() && !_frameSource.closed())
{
AMQFrame frame = _frameSource.getNextFrame(true);
if(frame instanceof HeaderFrame)
{
_connection.sendMessage(frame.getPayload().array(),
frame.getPayload().arrayOffset(),
frame.getPayload().remaining());
}
else if(frame != null)
{
frameWriter.setValue(frame);
buffer.clear();
int length = frameWriter.writeToBuffer(buffer);
_connection.sendMessage(_buffer,0,length);
}
}
if(_frameSource.closed() && _connection.isOpen())
{
_connection.close();
}
}
catch (Exception e)
{
e.printStackTrace();
}
finally
{
try
{
removeClient();
}
catch (Exception e)
{
e.printStackTrace();
}
}
}
}
}
|
