Skip to main content
aboutsummaryrefslogtreecommitdiffstats
blob: ee9f6711675bb0e4393da73c0c39e5a460a99434 (plain) (blame)
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
/**
 * Copyright (c) 2004 - 2011 Eike Stepper (Berlin, Germany) and others.
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/epl-v10.html
 *
 * Contributors:
 *    Eike Stepper - initial API and implementation
 *    Caspar De Groot - maintenance
 */
package org.eclipse.net4j.internal.tcp;

import org.eclipse.net4j.internal.tcp.bundle.OM;
import org.eclipse.net4j.tcp.ITCPAcceptor;
import org.eclipse.net4j.tcp.ITCPPassiveSelectorListener;
import org.eclipse.net4j.tcp.ITCPSelector;
import org.eclipse.net4j.util.ReflectUtil.ExcludeFromDump;
import org.eclipse.net4j.util.concurrent.Worker;
import org.eclipse.net4j.util.io.IOUtil;
import org.eclipse.net4j.util.om.trace.ContextTracer;

import org.eclipse.spi.net4j.Acceptor;

import java.io.IOException;
import java.net.InetAddress;
import java.net.InetSocketAddress;
import java.net.ServerSocket;
import java.nio.channels.ClosedChannelException;
import java.nio.channels.SelectionKey;
import java.nio.channels.ServerSocketChannel;
import java.nio.channels.SocketChannel;
import java.text.MessageFormat;
import java.util.concurrent.CountDownLatch;
import java.util.concurrent.TimeUnit;

/**
 * @author Eike Stepper
 */
public class TCPAcceptor extends Acceptor implements ITCPAcceptor, ITCPPassiveSelectorListener
{
  public static final boolean DEFAULT_START_SYNCHRONOUSLY = true;

  public static final long DEFAULT_SYNCHRONOUS_START_TIMEOUT = 2 * Worker.DEFAULT_TIMEOUT;

  private static final ContextTracer TRACER = new ContextTracer(OM.DEBUG, TCPAcceptor.class);

  private TCPSelector selector;

  @ExcludeFromDump
  private SelectionKey selectionKey;

  private boolean startSynchronously = DEFAULT_START_SYNCHRONOUSLY;

  private long synchronousStartTimeout = DEFAULT_SYNCHRONOUS_START_TIMEOUT;

  @ExcludeFromDump
  private CountDownLatch startLatch;

  private ServerSocketChannel serverSocketChannel;

  private String address = DEFAULT_ADDRESS;

  private int port = DEFAULT_PORT;

  public TCPAcceptor()
  {
  }

  public String getAddress()
  {
    return address;
  }

  public void setAddress(String address)
  {
    this.address = address;
  }

  public int getPort()
  {
    return port;
  }

  public void setPort(int port)
  {
    this.port = port;
  }

  public TCPSelector getSelector()
  {
    return selector;
  }

  public void setSelector(TCPSelector selector)
  {
    this.selector = selector;
  }

  public boolean isStartSynchronously()
  {
    return startSynchronously;
  }

  public void setStartSynchronously(boolean startSynchronously)
  {
    this.startSynchronously = startSynchronously;
  }

  public SelectionKey getSelectionKey()
  {
    return selectionKey;
  }

  public long getSynchronousStartTimeout()
  {
    return synchronousStartTimeout;
  }

  public void setSynchronousStartTimeout(long synchronousStartTimeout)
  {
    this.synchronousStartTimeout = synchronousStartTimeout;
  }

  public void handleRegistration(ITCPSelector selector, ServerSocketChannel serverSocketChannel)
  {
    try
    {
      InetSocketAddress addr = null;
      if (address != null)
      {
        addr = new InetSocketAddress(InetAddress.getByName(address), port);
      }

      ServerSocket socket = serverSocketChannel.socket();
      socket.bind(addr);

      if (addr == null)
      {
        address = socket.getInetAddress().toString();
        if (address.startsWith("/")) //$NON-NLS-1$
        {
          address = address.substring(1);
        }

        int colon = address.indexOf(':');
        if (colon != -1)
        {
          port = Integer.parseInt(address.substring(colon + 1));
          address = address.substring(0, colon);
        }
      }

      // [MACOSX] Must occur AFTER binding!
      selectionKey = serverSocketChannel.register(selector.getSocketSelector(), SelectionKey.OP_ACCEPT, this);
    }
    catch (Exception ex)
    {
      OM.LOG.error(ex);
      deactivateAsync();
    }
    finally
    {
      if (startLatch != null)
      {
        startLatch.countDown();
      }
    }
  }

  public void handleAccept(ITCPSelector selector, ServerSocketChannel serverSocketChannel)
  {
    try
    {
      SocketChannel socketChannel = serverSocketChannel.accept();
      if (socketChannel != null)
      {
        if (TRACER.isEnabled())
        {
          TRACER.trace("Accepted socketChannel " + socketChannel); //$NON-NLS-1$
        }

        // socketChannel.socket().setReuseAddress(true);
        // socketChannel.socket().setKeepAlive(true);
        socketChannel.configureBlocking(false);

        TCPConnector connector = createConnector();
        prepareConnector(connector);
        connector.setSocketChannel(socketChannel);
        connector.setSelector(selector);
        connector.activate();
      }
    }
    catch (ClosedChannelException ex)
    {
      deactivateAsync();
    }
    catch (Exception ex)
    {
      if (isActive())
      {
        OM.LOG.error(ex);
      }

      deactivateAsync();
    }
  }

  @Override
  public String toString()
  {
    return MessageFormat.format("TCPAcceptor[{0}:{1}]", address, port); //$NON-NLS-1$
  }

  protected TCPConnector createConnector()
  {
    return new TCPServerConnector(this);
  }

  @Override
  protected void doBeforeActivate() throws Exception
  {
    super.doBeforeActivate();
    if (selector == null)
    {
      throw new IllegalStateException("selector == null"); //$NON-NLS-1$
    }

    if (startSynchronously)
    {
      startLatch = new CountDownLatch(1);
    }
  }

  @Override
  protected void doActivate() throws Exception
  {
    super.doActivate();
    serverSocketChannel = ServerSocketChannel.open();
    serverSocketChannel.configureBlocking(false);
    selector.orderRegistration(serverSocketChannel, this);

    if (startLatch != null)
    {
      if (!startLatch.await(synchronousStartTimeout, TimeUnit.MILLISECONDS))
      {
        startLatch = null;
        IOUtil.closeSilent(serverSocketChannel);
        throw new IOException("Registration with selector timed out after " + synchronousStartTimeout + " millis"); //$NON-NLS-1$ //$NON-NLS-2$
      }
    }
  }

  @Override
  protected void doDeactivate() throws Exception
  {
    cancelSelectionKey();

    IOUtil.closeSilent(serverSocketChannel);
    serverSocketChannel = null;
    super.doDeactivate();
  }

  protected void deactivateAsync()
  {
    // Cancel the selection immediately
    cancelSelectionKey();

    // Do the rest of the deactivation asynchronously
    getConfig().getReceiveExecutor().execute(new Runnable()
    {
      public void run()
      {
        deactivate();
      }
    });
  }

  private void cancelSelectionKey()
  {
    if (selectionKey != null)
    {
      selectionKey.cancel();
      selectionKey = null;
    }
  }
}

Back to the top