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annotate src/org/eclipse/jetty/io/nio/SelectChannelEndPoint.java @ 969:0650077fcd6c

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remove SelectChannelEndPoint.setConnection()
author Franklin Schmidt <fschmidt@gmail.com>
date Fri, 14 Oct 2016 02:44:02 -0600
parents 0d20943cfea2
children 5ee36654b383
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
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1 //
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2 // ========================================================================
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3 // Copyright (c) 1995-2014 Mort Bay Consulting Pty. Ltd.
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4 // ------------------------------------------------------------------------
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5 // All rights reserved. This program and the accompanying materials
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6 // are made available under the terms of the Eclipse Public License v1.0
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7 // and Apache License v2.0 which accompanies this distribution.
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8 //
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9 // The Eclipse Public License is available at
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10 // http://www.eclipse.org/legal/epl-v10.html
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11 //
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12 // The Apache License v2.0 is available at
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13 // http://www.opensource.org/licenses/apache2.0.php
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14 //
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15 // You may elect to redistribute this code under either of these licenses.
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16 // ========================================================================
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17 //
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18
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19 package org.eclipse.jetty.io.nio;
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20
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21 import java.io.IOException;
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22 import java.io.InterruptedIOException;
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23 import java.nio.channels.ClosedChannelException;
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24 import java.nio.channels.SelectableChannel;
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25 import java.nio.channels.SelectionKey;
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26 import java.nio.channels.SocketChannel;
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27 import java.util.Locale;
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28 import java.util.concurrent.RejectedExecutionException;
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29
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30 import org.eclipse.jetty.io.AsyncEndPoint;
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31 import org.eclipse.jetty.io.Buffer;
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32 import org.eclipse.jetty.io.Connection;
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33 import org.eclipse.jetty.io.EofException;
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34 import org.slf4j.Logger;
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35 import org.slf4j.LoggerFactory;
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36
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37
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38 /* ------------------------------------------------------------ */
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39 /**
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40 * An Endpoint that can be scheduled by {@link SelectorManager}.
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41 */
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42 public final class SelectChannelEndPoint extends ChannelEndPoint implements AsyncEndPoint
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43 {
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44 public static final Logger LOG=LoggerFactory.getLogger("org.eclipse.jetty.io.nio");
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45
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46 private final SelectorManager _manager;
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47 private final SelectionKey _key;
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48 private final Runnable _handler = new Runnable()
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49 {
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50 public void run() { handle(); }
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51 };
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52
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53 /**
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54 * The connection instance is the handler for any IO activity on the endpoint.
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55 * There is a different type of connection for HTTP, AJP, WebSocket and
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56 * ProxyConnect. The connection may change for an SCEP as it is upgraded
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57 * from HTTP to proxy connect or websocket.
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58 */
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59 private final AsyncConnection _connection;
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60 /*
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61 private static final int STATE_NEEDS_DISPATCH = -1;
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62 private static final int STATE_UNDISPATCHED = 0;
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63 private static final int STATE_DISPATCHED = 1;
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64 private int _state;
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65 */
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66 private boolean isDispatched = false;
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67
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68 /** true if the last write operation succeed and wrote all offered bytes */
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69 private volatile boolean _writable = true;
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70
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71 /** True if a thread has is blocked in {@link #blockReadable(long)} */
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72 private boolean _readBlocked;
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73
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74 /** True if a thread has is blocked in {@link #blockWritable(long)} */
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75 private boolean _writeBlocked;
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76
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77 private boolean _ishut = false;
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78
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79 public SelectChannelEndPoint(SocketChannel channel, SelectorManager manager, SelectionKey key, int maxIdleTime)
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80 throws IOException
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81 {
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82 super(channel, maxIdleTime);
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83
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84 _manager = manager;
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85 _key = key;
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86 _connection = manager.newConnection(channel,this);
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87 }
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88
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89 /* ------------------------------------------------------------ */
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90 /** Called by selectSet to schedule handling
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91 *
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92 */
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93 public synchronized void schedule()
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94 {
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95 if (!_key.isValid())
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96 {
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97 /*
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98 _readBlocked = false;
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99 _writeBlocked = false;
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100 this.notifyAll();
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101 */
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102 _key.cancel();
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103 return;
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104 }
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105
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106 // If there are threads dispatched reading and writing
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107 if (_readBlocked || _writeBlocked)
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108 {
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109 // assert _dispatched;
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110 if (_readBlocked && _key.isReadable())
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111 _readBlocked = false;
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112 if (_writeBlocked && _key.isWritable())
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113 _writeBlocked = false;
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114
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115 // wake them up is as good as a dispatched.
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116 this.notifyAll();
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117
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118 // we are not interested in further selecting
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119 _key.interestOps(0);
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120 if( !isDispatched )
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121 updateKey();
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122 return;
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123 }
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124
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125 // Remove writeable op
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126 if ((_key.readyOps() & SelectionKey.OP_WRITE) == SelectionKey.OP_WRITE && (_key.interestOps() & SelectionKey.OP_WRITE) == SelectionKey.OP_WRITE)
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127 {
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128 // Remove writeable op
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129 int interestOps = _key.interestOps() & ~SelectionKey.OP_WRITE;
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130 _key.interestOps(interestOps);
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131 _writable = true; // Once writable is in ops, only removed with dispatch.
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132 }
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133
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134 // If dispatched, then deregister interest
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135 if (isDispatched)
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136 _key.interestOps(0);
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137 else
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138 {
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139 // other wise do the dispatch
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140 dispatch();
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141 }
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142 }
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143
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144 @Override
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145 public synchronized void dispatch()
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146 {
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147 if( !isDispatched )
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148 {
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149 isDispatched = true;
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150 try {
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151 _manager.execute(_handler);
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152 } catch(RejectedExecutionException e) {
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153 isDispatched = false;
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154 LOG.warn("Dispatched Failed! "+this+" to "+_manager);
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155 // updateKey();
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156 }
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157 }
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158 }
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159
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160 @Override
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161 public int fill(Buffer buffer) throws IOException
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162 {
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163 int fill=super.fill(buffer);
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164 return fill;
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165 }
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166
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167 @Override
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168 public int flush(Buffer header, Buffer buffer, Buffer trailer) throws IOException
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169 {
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170 int l = super.flush(header, buffer, trailer);
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171
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172 // If there was something to write and it wasn't written, then we are not writable.
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173 if (l==0 && ( header!=null && header.hasContent() || buffer!=null && buffer.hasContent() || trailer!=null && trailer.hasContent()))
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174 {
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175 synchronized (this)
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176 {
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177 _writable = false;
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178 if( !isDispatched )
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179 updateKey();
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180 }
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181 }
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182 else if (l>0)
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183 {
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184 _writable = true;
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185 }
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186 return l;
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187 }
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188
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189 @Override
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190 public int flush(Buffer buffer) throws IOException
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191 {
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192 int l = super.flush(buffer);
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193
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194 // If there was something to write and it wasn't written, then we are not writable.
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195 if (l==0 && buffer!=null && buffer.hasContent())
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196 {
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197 synchronized (this)
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198 {
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199 _writable = false;
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200 if( !isDispatched )
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201 updateKey();
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202 }
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203 }
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204 else if (l>0)
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205 {
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206 _writable = true;
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207 }
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208
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209 return l;
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210 }
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211
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212 /* ------------------------------------------------------------ */
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213 /*
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214 * Allows thread to block waiting for further events.
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215 */
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216 @Override
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217 public synchronized boolean blockReadable(long timeoutMs) throws IOException
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218 {
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219 if (isInputShutdown())
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220 throw new EofException();
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221
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222 long now = _manager.getNow();
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223 long end = now+timeoutMs;
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224 try
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225 {
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226 _readBlocked = true;
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227 while (!isInputShutdown() && _readBlocked)
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228 {
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229 try
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230 {
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231 updateKey();
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232 this.wait(timeoutMs>0?(end-now):10000);
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233 }
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234 catch (final InterruptedException e)
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235 {
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236 LOG.warn("",e);
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237 }
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238 finally
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239 {
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240 now = _manager.getNow();
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241 }
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242
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243 if (_readBlocked && timeoutMs>0 && now>=end)
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244 return false;
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245 }
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246 }
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247 finally
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248 {
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249 _readBlocked = false;
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250 }
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251 return true;
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252 }
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253
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254 /* ------------------------------------------------------------ */
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255 /*
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256 * Allows thread to block waiting for further events.
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257 */
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diff changeset
258 @Override
963
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259 public synchronized boolean blockWritable(long timeoutMs) throws IOException
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260 {
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261 if (isOutputShutdown())
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262 throw new EofException();
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263
964
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diff changeset
264 long now=_manager.getNow();
963
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diff changeset
265 long end=now+timeoutMs;
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266 try
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267 {
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268 _writeBlocked = true;
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269 while (_writeBlocked && !isOutputShutdown())
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270 {
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271 try
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272 {
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273 updateKey();
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274 this.wait(timeoutMs>0?(end-now):10000);
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275 }
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diff changeset
276 catch (final InterruptedException e)
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277 {
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278 LOG.warn("",e);
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279 }
963
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280 finally
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281 {
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282 now = _manager.getNow();
963
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283 }
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diff changeset
284 if (_writeBlocked && timeoutMs>0 && now>=end)
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285 return false;
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diff changeset
286 }
963
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287 }
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288 finally
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289 {
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290 _writeBlocked = false;
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291 }
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292 return true;
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293 }
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294
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295 @Override
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diff changeset
296 public boolean hasProgressed()
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297 {
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298 return false;
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299 }
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300
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diff changeset
301 /* ------------------------------------------------------------ */
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302 /**
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303 * Updates selection key. Adds operations types to the selection key as needed. No operations
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304 * are removed as this is only done during dispatch. This method records the new key and
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305 * schedules a call to doUpdateKey to do the keyChange
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306 */
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307 private synchronized void updateKey()
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diff changeset
308 {
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diff changeset
309 if( getChannel().isOpen() && _key.isValid())
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diff changeset
310 {
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diff changeset
311 boolean read_interest = _readBlocked || (!isDispatched && !_connection.isSuspended());
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diff changeset
312 boolean write_interest = _writeBlocked || (!isDispatched && !_writable);
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diff changeset
313 // boolean write_interest = _writeBlocked || !isDispatched;
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diff changeset
314 // boolean write_interest = true;
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315
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diff changeset
316 int interestOps =
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diff changeset
317 ((!_socket.isInputShutdown() && read_interest ) ? SelectionKey.OP_READ : 0)
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diff changeset
318 | ((!_socket.isOutputShutdown()&& write_interest) ? SelectionKey.OP_WRITE : 0);
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diff changeset
319 if( _key.interestOps() != interestOps ) {
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diff changeset
320 _key.interestOps(interestOps);
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diff changeset
321 _manager.getSelector().update();
865
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322 }
962
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323 } else {
94498d6daf5b remove SelectChannelEndPoint._interestOps
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324 _key.cancel();
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325 // update needed?
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326 }
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327 }
802
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328
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329
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330 private void handle()
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331 {
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332 try
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333 {
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334 try
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335 {
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866f2e801618 handle() returns void
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336 _connection.handle();
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337 }
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338 catch (ClosedChannelException e)
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339 {
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340 LOG.trace("",e);
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341 }
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342 catch (EofException e)
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343 {
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344 LOG.debug("EOF", e);
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345 try{close();}
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346 catch(IOException e2){LOG.trace("",e2);}
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347 }
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348 catch (IOException e)
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349 {
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350 LOG.warn(e.toString());
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351 try{close();}
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352 catch(IOException e2){LOG.trace("",e2);}
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353 }
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354 catch (Throwable e)
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355 {
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356 LOG.warn("handle failed", e);
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357 try{close();}
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358 catch(IOException e2){LOG.trace("",e2);}
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359 }
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360 finally
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361 {
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362 if (!_ishut && isInputShutdown() && isOpen())
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363 {
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364 _ishut = true;
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365 try
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366 {
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367 _connection.onInputShutdown();
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368 }
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369 catch(Throwable x)
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370 {
64f3d8dae31d simplify SelectChannelEndPoint
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371 LOG.warn("onInputShutdown failed", x);
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372 try{close();}
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373 catch(IOException e2){LOG.trace("",e2);}
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diff changeset
374 }
865
6b210bb66c63 remove ThreadPool
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diff changeset
375 }
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diff changeset
376 }
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377 }
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diff changeset
378 finally
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379 {
963
4b6216fa9cec replace SelectChannelEndPoint._state with isDispatched
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380 isDispatched = false;
960
3cd4c706a61f simplify ChannelEndPoint
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381 updateKey();
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diff changeset
382 }
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383 }
802
3428c60d7cfc replace jetty jars with source
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parents:
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384
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385 @Override
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386 public void close() throws IOException
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387 {
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diff changeset
388 try
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diff changeset
389 {
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diff changeset
390 super.close();
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391 }
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diff changeset
392 catch (IOException e)
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diff changeset
393 {
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diff changeset
394 LOG.trace("",e);
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diff changeset
395 }
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diff changeset
396 finally
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diff changeset
397 {
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diff changeset
398 updateKey();
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diff changeset
399 }
6b210bb66c63 remove ThreadPool
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diff changeset
400 }
802
3428c60d7cfc replace jetty jars with source
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parents:
diff changeset
401
865
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parents: 820
diff changeset
402 @Override
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diff changeset
403 public String toString()
6b210bb66c63 remove ThreadPool
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diff changeset
404 {
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diff changeset
405 // Do NOT use synchronized (this)
6b210bb66c63 remove ThreadPool
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parents: 820
diff changeset
406 // because it's very easy to deadlock when debugging is enabled.
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diff changeset
407 // We do a best effort to print the right toString() and that's it.
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diff changeset
408 SelectionKey key = _key;
6b210bb66c63 remove ThreadPool
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parents: 820
diff changeset
409 String keyString = "";
961
790c01734386 make SelectChannelEndPoint._key final
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parents: 960
diff changeset
410 if (key.isValid())
865
6b210bb66c63 remove ThreadPool
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parents: 820
diff changeset
411 {
961
790c01734386 make SelectChannelEndPoint._key final
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parents: 960
diff changeset
412 if (key.isReadable())
790c01734386 make SelectChannelEndPoint._key final
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parents: 960
diff changeset
413 keyString += "r";
790c01734386 make SelectChannelEndPoint._key final
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parents: 960
diff changeset
414 if (key.isWritable())
790c01734386 make SelectChannelEndPoint._key final
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diff changeset
415 keyString += "w";
865
6b210bb66c63 remove ThreadPool
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diff changeset
416 }
6b210bb66c63 remove ThreadPool
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parents: 820
diff changeset
417 else
6b210bb66c63 remove ThreadPool
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parents: 820
diff changeset
418 {
961
790c01734386 make SelectChannelEndPoint._key final
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parents: 960
diff changeset
419 keyString += "!";
865
6b210bb66c63 remove ThreadPool
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parents: 820
diff changeset
420 }
963
4b6216fa9cec replace SelectChannelEndPoint._state with isDispatched
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parents: 962
diff changeset
421 return String.format("SCEP@%x{l(%s)<->r(%s),dispatched=%b,open=%b,ishut=%b,oshut=%b,rb=%b,wb=%b,w=%b,i=%s}-{%s}",
865
6b210bb66c63 remove ThreadPool
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parents: 820
diff changeset
422 hashCode(),
6b210bb66c63 remove ThreadPool
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parents: 820
diff changeset
423 _socket.getRemoteSocketAddress(),
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parents: 820
diff changeset
424 _socket.getLocalSocketAddress(),
963
4b6216fa9cec replace SelectChannelEndPoint._state with isDispatched
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parents: 962
diff changeset
425 isDispatched,
865
6b210bb66c63 remove ThreadPool
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parents: 820
diff changeset
426 isOpen(),
6b210bb66c63 remove ThreadPool
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parents: 820
diff changeset
427 isInputShutdown(),
6b210bb66c63 remove ThreadPool
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parents: 820
diff changeset
428 isOutputShutdown(),
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parents: 820
diff changeset
429 _readBlocked,
6b210bb66c63 remove ThreadPool
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parents: 820
diff changeset
430 _writeBlocked,
6b210bb66c63 remove ThreadPool
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parents: 820
diff changeset
431 _writable,
6b210bb66c63 remove ThreadPool
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diff changeset
432 keyString,
6b210bb66c63 remove ThreadPool
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parents: 820
diff changeset
433 _connection);
6b210bb66c63 remove ThreadPool
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parents: 820
diff changeset
434 }
802
3428c60d7cfc replace jetty jars with source
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parents:
diff changeset
435
865
6b210bb66c63 remove ThreadPool
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parents: 820
diff changeset
436 /* ------------------------------------------------------------ */
6b210bb66c63 remove ThreadPool
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parents: 820
diff changeset
437 /**
6b210bb66c63 remove ThreadPool
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diff changeset
438 * Don't set the SoTimeout
6b210bb66c63 remove ThreadPool
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parents: 820
diff changeset
439 * @see org.eclipse.jetty.io.nio.ChannelEndPoint#setMaxIdleTime(int)
6b210bb66c63 remove ThreadPool
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diff changeset
440 */
6b210bb66c63 remove ThreadPool
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diff changeset
441 @Override
6b210bb66c63 remove ThreadPool
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diff changeset
442 public void setMaxIdleTime(int timeMs) throws IOException
6b210bb66c63 remove ThreadPool
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parents: 820
diff changeset
443 {
955
6f49b8dfffe6 simplify SelectChannelEndPoint
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parents: 953
diff changeset
444 _maxIdleTime = timeMs;
865
6b210bb66c63 remove ThreadPool
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parents: 820
diff changeset
445 }
802
3428c60d7cfc replace jetty jars with source
Franklin Schmidt <fschmidt@gmail.com>
parents:
diff changeset
446
3428c60d7cfc replace jetty jars with source
Franklin Schmidt <fschmidt@gmail.com>
parents:
diff changeset
447 }