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annotate src/org/eclipse/jetty/server/Connector.java @ 906:eaf271fb747f

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minor
author Franklin Schmidt <fschmidt@gmail.com>
date Fri, 07 Oct 2016 03:59:44 -0600
parents e7175965e6cf
children bc4e299de953
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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.util.concurrent.ThreadPoolExecutor;
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26 import java.util.concurrent.atomic.AtomicLong;
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27
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28 import javax.servlet.ServletRequest;
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29
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30 import org.eclipse.jetty.http.HttpBuffers;
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31 import org.eclipse.jetty.http.HttpBuffersImpl;
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32 import org.eclipse.jetty.http.HttpFields;
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33 import org.eclipse.jetty.http.HttpHeaders;
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34 import org.eclipse.jetty.http.HttpSchemes;
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35 import org.eclipse.jetty.io.Buffers;
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36 import org.eclipse.jetty.io.Buffers.Type;
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37 import org.eclipse.jetty.io.Connection;
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38 import org.eclipse.jetty.io.EndPoint;
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39 import org.eclipse.jetty.io.EofException;
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40 import org.eclipse.jetty.util.component.AggregateLifeCycle;
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41 import org.eclipse.jetty.util.component.Dumpable;
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42 import org.slf4j.Logger;
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43 import org.slf4j.LoggerFactory;
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44
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45 /**
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46 * Abstract Connector implementation. This abstract implementation of the Connector interface provides:
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47 * <ul>
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48 * <li>AbstractLifeCycle implementation</li>
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49 * <li>Implementations for connector getters and setters</li>
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50 * <li>Buffer management</li>
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51 * <li>Socket configuration</li>
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52 * <li>Base acceptor thread</li>
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53 * <li>Optional reverse proxy headers checking</li>
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54 * </ul>
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55 */
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56 public abstract class Connector extends AggregateLifeCycle implements HttpBuffers, Dumpable
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57 {
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58 private static final Logger LOG = LoggerFactory.getLogger(Connector.class);
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59
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60 private String _name;
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61
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62 public final Server server;
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63 private String _host;
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64 public final int port;
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65 private int _acceptors = 1;
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66
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67 protected int _maxIdleTime = 200000;
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68 protected int _lowResourceMaxIdleTime = -1;
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69 protected int _soLingerTime = -1;
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70
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71 protected final HttpBuffersImpl _buffers = new HttpBuffersImpl();
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72
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73 public Connector(Server server,int port) {
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74 this.server = server;
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75 this.port = port;
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76 server.connectors.add(this);
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77 addBean(_buffers);
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78 }
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79
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80 /* ------------------------------------------------------------ */
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81 /**
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82 */
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83 public void setHost(String host)
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84 {
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85 _host = host;
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86 }
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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 public String getHost()
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92 {
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93 return _host;
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94 }
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95
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96 /* ------------------------------------------------------------ */
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97 /**
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98 * @return Returns the maxIdleTime.
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99 */
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100 public int getMaxIdleTime()
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101 {
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102 return _maxIdleTime;
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103 }
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104
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105 /* ------------------------------------------------------------ */
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106 /**
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107 * 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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108 * other mechanisms may be used to implement the timeout. The max idle time is applied:
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109 * <ul>
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110 * <li>When waiting for a new request to be received on a connection</li>
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111 * <li>When reading the headers and content of a request</li>
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112 * <li>When writing the headers and content of a response</li>
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113 * </ul>
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114 * 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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115 * 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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116 * 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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117 * take many 10s of seconds for large content written to a slow device.
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118 * <p>
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119 * 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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120 * 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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121 *
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122 * @param maxIdleTime
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123 * The maxIdleTime to set.
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124 */
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125 public void setMaxIdleTime(int maxIdleTime)
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126 {
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127 _maxIdleTime = maxIdleTime;
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128 }
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129
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130 /* ------------------------------------------------------------ */
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131 /**
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132 * @return Returns the maxIdleTime when resources are low.
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133 */
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134 public int getLowResourcesMaxIdleTime()
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135 {
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136 return _lowResourceMaxIdleTime;
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137 }
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138
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139 /* ------------------------------------------------------------ */
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140 /**
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141 * @param maxIdleTime
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142 * The maxIdleTime to set when resources are low.
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143 */
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144 public void setLowResourcesMaxIdleTime(int maxIdleTime)
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145 {
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146 _lowResourceMaxIdleTime = maxIdleTime;
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147 }
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148
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149 /* ------------------------------------------------------------ */
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150 /**
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151 * @return Returns the maxIdleTime when resources are low.
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152 * @deprecated
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153 */
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154 @Deprecated
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155 public final int getLowResourceMaxIdleTime()
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156 {
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157 return getLowResourcesMaxIdleTime();
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158 }
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159
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160 /* ------------------------------------------------------------ */
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161 /**
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162 * @param maxIdleTime
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163 * The maxIdleTime to set when resources are low.
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164 * @deprecated
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165 */
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166 @Deprecated
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167 public final void setLowResourceMaxIdleTime(int maxIdleTime)
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168 {
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169 setLowResourcesMaxIdleTime(maxIdleTime);
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170 }
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171
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172 /* ------------------------------------------------------------ */
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173 /**
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174 * @return Returns the soLingerTime.
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175 */
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176 public int getSoLingerTime()
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177 {
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178 return _soLingerTime;
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179 }
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180
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181 /* ------------------------------------------------------------ */
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182 /**
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183 * @return Returns the number of acceptor threads.
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184 */
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185 public int getAcceptors()
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186 {
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187 return _acceptors;
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188 }
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189
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190 /* ------------------------------------------------------------ */
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191 /**
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192 * @param acceptors
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193 * The number of acceptor threads to set.
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194 */
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195 public void setAcceptors(int acceptors)
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196 {
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197 if (acceptors > 2 * Runtime.getRuntime().availableProcessors())
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198 LOG.warn("Acceptors should be <=2*availableProcessors: " + this);
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199 _acceptors = acceptors;
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200 }
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201
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202 /* ------------------------------------------------------------ */
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203 /**
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204 * @param soLingerTime
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205 * The soLingerTime to set or -1 to disable.
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206 */
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207 public void setSoLingerTime(int soLingerTime)
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208 {
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209 _soLingerTime = soLingerTime;
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210 }
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211
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212 /* ------------------------------------------------------------ */
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213 @Override
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214 protected void doStart() throws Exception
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215 {
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216 // open listener port
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217 open();
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218
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219 super.doStart();
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220
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221 // Start selector thread
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222 ThreadPoolExecutor _threadPool = server.threadPool;
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223 for (int i = 0; i < _acceptors; i++)
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224 _threadPool.execute(new Acceptor());
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225 if (server.isLowOnThreads())
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226 LOG.warn("insufficient threads configured for {}",this);
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227
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228 LOG.info("Started {}",this);
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229 }
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230
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231 /* ------------------------------------------------------------ */
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232 @Override
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233 protected void doStop() throws Exception
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234 {
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235 try
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236 {
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237 close();
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238 }
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239 catch (IOException e)
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240 {
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241 LOG.warn("",e);
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242 }
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243
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244 super.doStop();
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245 }
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246
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247
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248 /* ------------------------------------------------------------ */
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249 protected void configure(Socket socket) throws IOException
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250 {
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251 try
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252 {
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253 socket.setTcpNoDelay(true);
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254 if (_soLingerTime >= 0)
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255 socket.setSoLinger(true,_soLingerTime / 1000);
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256 else
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257 socket.setSoLinger(false,0);
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258 }
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259 catch (Exception e)
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260 {
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261 LOG.trace("",e);
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262 }
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263 }
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264
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265 public void customize(EndPoint endpoint, Request request) throws IOException
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266 {
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267 }
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268
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269 public void persist(EndPoint endpoint) throws IOException
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270 {
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271 }
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272
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273 /* ------------------------------------------------------------ */
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274 /*
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275 * @see org.eclipse.jetty.server.Connector#isConfidential(org.eclipse.jetty.server.Request)
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276 */
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277 public boolean isConfidential(Request request)
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278 {
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279 return false;
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280 }
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281
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282 /* ------------------------------------------------------------ */
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283 protected abstract void accept() throws IOException, InterruptedException;
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284
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285 /* ------------------------------------------------------------ */
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286 public void stopAccept(int acceptorID) throws Exception
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287 {
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288 }
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289
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290 public int getRequestBufferSize()
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291 {
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292 return _buffers.getRequestBufferSize();
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293 }
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294
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295 public void setRequestBufferSize(int requestBufferSize)
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296 {
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297 _buffers.setRequestBufferSize(requestBufferSize);
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298 }
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299
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300 public int getRequestHeaderSize()
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301 {
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302 return _buffers.getRequestHeaderSize();
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303 }
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304
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305 public void setRequestHeaderSize(int requestHeaderSize)
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306 {
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307 _buffers.setRequestHeaderSize(requestHeaderSize);
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308 }
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309
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310 public int getResponseBufferSize()
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311 {
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312 return _buffers.getResponseBufferSize();
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313 }
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314
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315 public void setResponseBufferSize(int responseBufferSize)
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316 {
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317 _buffers.setResponseBufferSize(responseBufferSize);
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318 }
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319
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320 public int getResponseHeaderSize()
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321 {
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322 return _buffers.getResponseHeaderSize();
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323 }
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324
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325 public void setResponseHeaderSize(int responseHeaderSize)
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326 {
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327 _buffers.setResponseHeaderSize(responseHeaderSize);
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328 }
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329
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330 public Type getRequestBufferType()
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331 {
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332 return _buffers.getRequestBufferType();
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333 }
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334
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335 public Type getRequestHeaderType()
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336 {
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337 return _buffers.getRequestHeaderType();
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338 }
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339
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340 public Type getResponseBufferType()
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341 {
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342 return _buffers.getResponseBufferType();
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343 }
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344
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345 public Type getResponseHeaderType()
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346 {
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347 return _buffers.getResponseHeaderType();
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348 }
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349
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350 public void setRequestBuffers(Buffers requestBuffers)
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351 {
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352 _buffers.setRequestBuffers(requestBuffers);
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353 }
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354
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355 public void setResponseBuffers(Buffers responseBuffers)
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356 {
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357 _buffers.setResponseBuffers(responseBuffers);
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358 }
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359
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360 public Buffers getRequestBuffers()
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361 {
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362 return _buffers.getRequestBuffers();
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363 }
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364
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365 public Buffers getResponseBuffers()
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366 {
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367 return _buffers.getResponseBuffers();
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368 }
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369
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370 public int getMaxBuffers()
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371 {
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372 return _buffers.getMaxBuffers();
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373 }
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374
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375 /* ------------------------------------------------------------ */
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376 @Override
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377 public String toString()
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378 {
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379 return String.format("%s@%s:%d",
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380 getClass().getSimpleName(),
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381 getHost()==null?"0.0.0.0":getHost(),
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382 getLocalPort()<=0 ? port : getLocalPort());
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383 }
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384
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385 /* ------------------------------------------------------------ */
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386 /* ------------------------------------------------------------ */
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387 /* ------------------------------------------------------------ */
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388 private class Acceptor implements Runnable
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389 {
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390
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391 public void run()
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392 {
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393 Thread current = Thread.currentThread();
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394 String name = current.getName();
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395 current.setName(name + " Acceptor" + " " + Connector.this);
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396
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397 try
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398 {
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399 while (isRunning() && getConnection() != null)
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400 {
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401 try
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402 {
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403 accept();
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404 }
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405 catch (EofException e)
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406 {
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407 LOG.trace("",e);
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408 }
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409 catch (IOException e)
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410 {
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411 LOG.trace("",e);
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412 }
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413 catch (InterruptedException x)
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414 {
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415 // Connector has been stopped
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416 LOG.trace("",x);
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417 }
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418 catch (Throwable e)
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419 {
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420 LOG.warn("",e);
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421 }
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422 }
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423 }
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424 finally
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425 {
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426 current.setName(name);
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427 }
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428 }
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429 }
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430
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431 public String getName()
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432 {
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433 if (_name == null)
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434 _name = (getHost() == null?"0.0.0.0":getHost()) + ":" + (getLocalPort() <= 0?port:getLocalPort());
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435 return _name;
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436 }
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437
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438 /* ------------------------------------------------------------ */
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439 public final boolean isLowResources()
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440 {
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441 return server.isLowOnThreads();
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442 }
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443
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444 // from old interface
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445 public abstract void open() throws IOException;
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446 public abstract void close() throws IOException;
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447 public abstract int getLocalPort();
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448 public abstract Object getConnection();
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449 }