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annotate src/org/eclipse/jetty/server/Connector.java @ 1047:1accf965d51a

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remove other Buffer implementations
author Franklin Schmidt <fschmidt@gmail.com>
date Mon, 07 Nov 2016 22:51:09 -0700
parents a8c92b0a08ed
children 2b769da7f67d
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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.util.component.AggregateLifeCycle;
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37 import org.eclipse.jetty.util.component.Dumpable;
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38 import org.slf4j.Logger;
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39 import org.slf4j.LoggerFactory;
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40
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41 /**
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42 * Abstract Connector implementation. This abstract implementation of the Connector interface provides:
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43 * <ul>
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44 * <li>AbstractLifeCycle implementation</li>
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45 * <li>Implementations for connector getters and setters</li>
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46 * <li>Buffer management</li>
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47 * <li>Socket configuration</li>
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48 * <li>Base acceptor thread</li>
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49 * <li>Optional reverse proxy headers checking</li>
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50 * </ul>
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51 */
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52 public abstract class Connector extends AggregateLifeCycle implements Dumpable, Runnable
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53 {
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54 private static final Logger LOG = LoggerFactory.getLogger(Connector.class);
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55
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56 private String _name;
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57
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58 public final Server server;
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59 private String _host;
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60 public final int port;
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61
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62 protected final int _maxIdleTime = 200000;
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63 protected int _soLingerTime = -1;
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64
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65 // from child classes
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66 protected transient ServerSocketChannel _acceptChannel;
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67
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68 protected Connector(Server server,int port) {
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69 this.server = server;
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70 this.port = port;
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71 server.connectors.add(this);
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72 }
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73
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74 public final void setHost(String host)
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75 {
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76 _host = host;
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77 }
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78
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79 public final String getHost()
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80 {
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81 return _host;
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82 }
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83
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84 public final int getMaxIdleTime()
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85 {
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86 return _maxIdleTime;
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87 }
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88
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89 /* ------------------------------------------------------------ */
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90 /**
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91 * 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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92 * other mechanisms may be used to implement the timeout. The max idle time is applied:
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93 * <ul>
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94 * <li>When waiting for a new request to be received on a connection</li>
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95 * <li>When reading the headers and content of a request</li>
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96 * <li>When writing the headers and content of a response</li>
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97 * </ul>
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98 * 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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99 * 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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100 * 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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101 * take many 10s of seconds for large content written to a slow device.
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102 * <p>
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103 * 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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104 * 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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105 *
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106 * @param maxIdleTime
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107 * The maxIdleTime to set.
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108 */
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109
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110 public final int getSoLingerTime()
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111 {
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112 return _soLingerTime;
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113 }
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114
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115 /* ------------------------------------------------------------ */
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116 /**
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117 * @param soLingerTime
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118 * The soLingerTime to set or -1 to disable.
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119 */
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120 public final void setSoLingerTime(int soLingerTime)
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121 {
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122 _soLingerTime = soLingerTime;
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123 }
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124
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125 @Override
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126 protected void doStart() throws Exception
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127 {
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128 super.doStart();
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129
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130 // Start selector thread
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131 ThreadPoolExecutor _threadPool = server.threadPool;
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132 _threadPool.execute(this);
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133 if (server.isLowOnThreads())
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134 LOG.warn("insufficient threads configured for {}",this);
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135
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136 LOG.info("Started {}",this);
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137 }
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138
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139 @Override
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140 protected synchronized void doStop() throws Exception
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141 {
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142 try
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143 {
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144 if (_acceptChannel != null)
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145 _acceptChannel.close();
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146 _acceptChannel=null;
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147 }
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148 catch (IOException e)
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149 {
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150 LOG.warn("",e);
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151 }
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152
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153 super.doStop();
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154 }
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155
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156
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157 protected final void configure(Socket socket) throws IOException
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158 {
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159 socket.setTcpNoDelay(true);
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160 if (_soLingerTime >= 0)
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161 socket.setSoLinger(true,_soLingerTime / 1000);
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162 else
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163 socket.setSoLinger(false,0);
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164 }
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165
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166 public abstract void customize(AbstractHttpConnection con) throws IOException;
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167
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168 public boolean isConfidential()
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169 {
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170 return false;
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171 }
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172
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173 protected abstract void accept() throws IOException, InterruptedException;
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174
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175 @Override
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176 public String toString()
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177 {
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178 return String.format("%s@%s:%d",
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179 getClass().getSimpleName(),
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180 getHost()==null?"0.0.0.0":getHost(),
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181 port);
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182 }
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183
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184
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185 @Override
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186 public void run()
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187 {
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188 Thread current = Thread.currentThread();
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189 String name = current.getName();
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190 current.setName(name + " Acceptor" + " " + Connector.this);
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191
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192 try
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193 {
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194 while (isRunning() && _acceptChannel != null)
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195 {
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196 try
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197 {
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198 accept();
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199 }
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200 catch (EofException e)
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201 {
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202 LOG.trace("",e);
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203 }
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204 catch (IOException e)
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205 {
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206 LOG.trace("",e);
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207 }
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208 catch (InterruptedException x)
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209 {
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210 // Connector has been stopped
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211 LOG.trace("",x);
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212 }
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213 catch (Throwable e)
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214 {
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215 LOG.warn("",e);
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216 }
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217 }
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218 }
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219 finally
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220 {
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221 current.setName(name);
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222 }
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223 }
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224
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225 public final String getName()
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226 {
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227 if (_name == null)
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228 _name = (getHost() == null?"0.0.0.0":getHost()) + ":" + port;
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229 return _name;
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230 }
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231
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232
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233
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234 // from HttpBuffersImpl
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235
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236 protected int _requestHeaderSize = 6*1024;
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237 protected int _requestBufferSize = 16*1024;
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238 private final int _responseHeaderSize = 6*1024;
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239 private final int _responseBufferSize = 32*1024;
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240
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241 public final Buffers getRequestBuffers()
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242 {
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243 return new MyBuffers(_requestHeaderSize,_requestBufferSize);
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244 }
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245
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246 public final Buffers getResponseBuffers()
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247 {
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248 return new MyBuffers(_responseHeaderSize,_responseBufferSize);
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249 }
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250
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251
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252 // my own buffers
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253
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254 protected Buffer newBuffer(int size) {
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255 return BufferUtil.newDirectBuffer(size);
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256 }
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257
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258 private class MyBuffers implements Buffers {
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259 private final int headerSize;
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260 private final int bufferSize;
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261
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262 MyBuffers(int headerSize,int bufferSize) {
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263 this.headerSize = headerSize;
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264 this.bufferSize = bufferSize;
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265 }
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266
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267 @Override
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268 public Buffer getHeader() {
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269 return BufferUtil.newBuffer(headerSize);
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270 }
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271
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272 @Override
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273 public Buffer getBuffer() {
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274 return newBuffer(bufferSize);
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275 }
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276
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277 @Override
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278 public Buffer getBuffer(int size) {
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279 return newBuffer(size);
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280 }
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281 }
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282 }