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annotate src/org/eclipse/jetty/server/Connector.java @ 1046:a8c92b0a08ed

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add JBuffer
author Franklin Schmidt <fschmidt@gmail.com>
date Mon, 07 Nov 2016 22:39:39 -0700
parents 8c13b9224cff
children 1accf965d51a
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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.server;
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20
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21 import java.io.IOException;
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22 import java.net.InetAddress;
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23 import java.net.Socket;
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24 import java.net.UnknownHostException;
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25 import java.nio.channels.ServerSocketChannel;
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26 import java.util.concurrent.ThreadPoolExecutor;
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27 import java.util.concurrent.atomic.AtomicLong;
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28
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29 import javax.servlet.ServletRequest;
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30
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31 import org.eclipse.jetty.io.Buffer;
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32 import org.eclipse.jetty.io.Buffers;
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33 import org.eclipse.jetty.io.BufferUtil;
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34 import org.eclipse.jetty.io.EndPoint;
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35 import org.eclipse.jetty.io.EofException;
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36 import org.eclipse.jetty.io.nio.DirectNIOBuffer;
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37 import org.eclipse.jetty.io.nio.IndirectNIOBuffer;
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38 import org.eclipse.jetty.util.component.AggregateLifeCycle;
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39 import org.eclipse.jetty.util.component.Dumpable;
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40 import org.slf4j.Logger;
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41 import org.slf4j.LoggerFactory;
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42
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43 /**
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44 * Abstract Connector implementation. This abstract implementation of the Connector interface provides:
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45 * <ul>
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46 * <li>AbstractLifeCycle implementation</li>
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47 * <li>Implementations for connector getters and setters</li>
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48 * <li>Buffer management</li>
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49 * <li>Socket configuration</li>
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50 * <li>Base acceptor thread</li>
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51 * <li>Optional reverse proxy headers checking</li>
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52 * </ul>
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53 */
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54 public abstract class Connector extends AggregateLifeCycle implements Dumpable, Runnable
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55 {
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56 private static final Logger LOG = LoggerFactory.getLogger(Connector.class);
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57
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58 private String _name;
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59
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60 public final Server server;
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61 private String _host;
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62 public final int port;
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63
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64 protected final int _maxIdleTime = 200000;
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65 protected int _soLingerTime = -1;
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66
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67 // from child classes
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68 protected transient ServerSocketChannel _acceptChannel;
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69
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70 protected Connector(Server server,int port) {
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71 this.server = server;
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72 this.port = port;
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73 server.connectors.add(this);
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74 }
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75
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76 public final void setHost(String host)
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77 {
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78 _host = host;
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79 }
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80
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81 public final String getHost()
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82 {
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83 return _host;
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84 }
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85
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86 public final int getMaxIdleTime()
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87 {
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88 return _maxIdleTime;
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89 }
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90
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91 /* ------------------------------------------------------------ */
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92 /**
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93 * Set the maximum Idle time for a connection, which roughly translates to the {@link Socket#setSoTimeout(int)} call, although with NIO implementations
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94 * other mechanisms may be used to implement the timeout. The max idle time is applied:
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95 * <ul>
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96 * <li>When waiting for a new request to be received on a connection</li>
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97 * <li>When reading the headers and content of a request</li>
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98 * <li>When writing the headers and content of a response</li>
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99 * </ul>
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100 * Jetty interprets this value as the maximum time between some progress being made on the connection. So if a single byte is read or written, then the
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101 * timeout (if implemented by jetty) is reset. However, in many instances, the reading/writing is delegated to the JVM, and the semantic is more strictly
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102 * enforced as the maximum time a single read/write operation can take. Note, that as Jetty supports writes of memory mapped file buffers, then a write may
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103 * take many 10s of seconds for large content written to a slow device.
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104 * <p>
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105 * Previously, Jetty supported separate idle timeouts and IO operation timeouts, however the expense of changing the value of soTimeout was significant, so
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106 * these timeouts were merged. With the advent of NIO, it may be possible to again differentiate these values (if there is demand).
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107 *
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108 * @param maxIdleTime
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109 * The maxIdleTime to set.
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110 */
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111
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112 public final int getSoLingerTime()
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113 {
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114 return _soLingerTime;
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115 }
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116
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117 /* ------------------------------------------------------------ */
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118 /**
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119 * @param soLingerTime
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120 * The soLingerTime to set or -1 to disable.
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121 */
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122 public final void setSoLingerTime(int soLingerTime)
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123 {
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124 _soLingerTime = soLingerTime;
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125 }
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126
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127 @Override
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128 protected void doStart() throws Exception
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129 {
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130 super.doStart();
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131
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132 // Start selector thread
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133 ThreadPoolExecutor _threadPool = server.threadPool;
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134 _threadPool.execute(this);
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135 if (server.isLowOnThreads())
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136 LOG.warn("insufficient threads configured for {}",this);
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137
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138 LOG.info("Started {}",this);
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139 }
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140
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141 @Override
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142 protected synchronized void doStop() throws Exception
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143 {
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144 try
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145 {
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146 if (_acceptChannel != null)
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147 _acceptChannel.close();
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148 _acceptChannel=null;
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149 }
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150 catch (IOException e)
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151 {
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152 LOG.warn("",e);
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153 }
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154
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155 super.doStop();
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156 }
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157
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158
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159 protected final void configure(Socket socket) throws IOException
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160 {
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161 socket.setTcpNoDelay(true);
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162 if (_soLingerTime >= 0)
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163 socket.setSoLinger(true,_soLingerTime / 1000);
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164 else
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165 socket.setSoLinger(false,0);
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166 }
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167
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168 public abstract void customize(AbstractHttpConnection con) throws IOException;
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169
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170 public boolean isConfidential()
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171 {
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172 return false;
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173 }
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174
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175 protected abstract void accept() throws IOException, InterruptedException;
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176
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177 @Override
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178 public String toString()
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179 {
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180 return String.format("%s@%s:%d",
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181 getClass().getSimpleName(),
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182 getHost()==null?"0.0.0.0":getHost(),
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183 port);
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184 }
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185
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186
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187 @Override
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188 public void run()
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189 {
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190 Thread current = Thread.currentThread();
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191 String name = current.getName();
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192 current.setName(name + " Acceptor" + " " + Connector.this);
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193
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194 try
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195 {
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196 while (isRunning() && _acceptChannel != null)
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197 {
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198 try
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199 {
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200 accept();
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201 }
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202 catch (EofException e)
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203 {
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204 LOG.trace("",e);
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205 }
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206 catch (IOException e)
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207 {
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208 LOG.trace("",e);
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209 }
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210 catch (InterruptedException x)
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211 {
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212 // Connector has been stopped
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213 LOG.trace("",x);
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214 }
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215 catch (Throwable e)
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216 {
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217 LOG.warn("",e);
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218 }
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219 }
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220 }
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221 finally
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222 {
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223 current.setName(name);
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224 }
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225 }
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226
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227 public final String getName()
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228 {
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229 if (_name == null)
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230 _name = (getHost() == null?"0.0.0.0":getHost()) + ":" + port;
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231 return _name;
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232 }
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233
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234
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235
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236 // from HttpBuffersImpl
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237
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238 protected int _requestHeaderSize = 6*1024;
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239 protected int _requestBufferSize = 16*1024;
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240 private final int _responseHeaderSize = 6*1024;
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241 private final int _responseBufferSize = 32*1024;
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242
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243 public final Buffers getRequestBuffers()
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244 {
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245 return new MyBuffers(_requestHeaderSize,_requestBufferSize);
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246 }
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247
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248 public final Buffers getResponseBuffers()
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249 {
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250 return new MyBuffers(_responseHeaderSize,_responseBufferSize);
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251 }
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252
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253
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254 // my own buffers
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255
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256 protected Buffer newBuffer(int size) {
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257 // return new DirectNIOBuffer(size);
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258 return BufferUtil.newDirectBuffer(size);
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259 }
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260
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261 private class MyBuffers implements Buffers {
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262 private final int headerSize;
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263 private final int bufferSize;
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264
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265 MyBuffers(int headerSize,int bufferSize) {
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266 this.headerSize = headerSize;
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267 this.bufferSize = bufferSize;
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268 }
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269
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270 @Override
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271 public Buffer getHeader() {
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272 // return new IndirectNIOBuffer(headerSize);
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273 return BufferUtil.newBuffer(headerSize);
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274 }
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275
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276 @Override
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277 public Buffer getBuffer() {
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278 return newBuffer(bufferSize);
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279 }
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280
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281 @Override
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282 public Buffer getBuffer(int size) {
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283 return newBuffer(size);
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284 }
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285 }
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286 }