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annotate src/org/eclipse/jetty/server/Connector.java @ 909:c60c1adfac3e

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simplify connectors
author Franklin Schmidt <fschmidt@gmail.com>
date Sat, 08 Oct 2016 21:15:28 -0600
parents bc4e299de953
children 17f4fe8271de
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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.http.HttpBuffers;
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32 import org.eclipse.jetty.http.HttpBuffersImpl;
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33 import org.eclipse.jetty.http.HttpFields;
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34 import org.eclipse.jetty.http.HttpHeaders;
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35 import org.eclipse.jetty.http.HttpSchemes;
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36 import org.eclipse.jetty.io.Buffers;
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37 import org.eclipse.jetty.io.Buffers.Type;
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38 import org.eclipse.jetty.io.Connection;
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39 import org.eclipse.jetty.io.EndPoint;
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40 import org.eclipse.jetty.io.EofException;
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41 import org.eclipse.jetty.util.component.AggregateLifeCycle;
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42 import org.eclipse.jetty.util.component.Dumpable;
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43 import org.slf4j.Logger;
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44 import org.slf4j.LoggerFactory;
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45
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46 /**
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47 * Abstract Connector implementation. This abstract implementation of the Connector interface provides:
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48 * <ul>
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49 * <li>AbstractLifeCycle implementation</li>
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50 * <li>Implementations for connector getters and setters</li>
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51 * <li>Buffer management</li>
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52 * <li>Socket configuration</li>
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53 * <li>Base acceptor thread</li>
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54 * <li>Optional reverse proxy headers checking</li>
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55 * </ul>
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56 */
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57 public abstract class Connector extends AggregateLifeCycle implements HttpBuffers, Dumpable
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58 {
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59 private static final Logger LOG = LoggerFactory.getLogger(Connector.class);
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60
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61 private String _name;
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62
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63 public final Server server;
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64 private String _host;
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65 public final int port;
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66 private int _acceptors = 1;
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67
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68 protected int _maxIdleTime = 200000;
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69 protected int _lowResourceMaxIdleTime = -1;
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70 protected int _soLingerTime = -1;
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71
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72 protected final HttpBuffersImpl _buffers = new HttpBuffersImpl();
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73
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74 // from child classes
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75 protected transient ServerSocketChannel _acceptChannel;
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76
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77 public Connector(Server server,int port) {
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78 this.server = server;
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79 this.port = port;
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80 server.connectors.add(this);
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81 addBean(_buffers);
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82 _buffers.setRequestBufferType(Type.DIRECT);
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83 _buffers.setRequestHeaderType(Type.INDIRECT);
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84 _buffers.setResponseBufferType(Type.DIRECT);
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85 _buffers.setResponseHeaderType(Type.INDIRECT);
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86 }
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87
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88 public void setHost(String host)
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89 {
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90 _host = host;
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91 }
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92
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93 public String getHost()
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94 {
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95 return _host;
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96 }
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97
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98 public int getMaxIdleTime()
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99 {
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100 return _maxIdleTime;
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101 }
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102
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103 /* ------------------------------------------------------------ */
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104 /**
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105 * 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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106 * other mechanisms may be used to implement the timeout. The max idle time is applied:
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107 * <ul>
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108 * <li>When waiting for a new request to be received on a connection</li>
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109 * <li>When reading the headers and content of a request</li>
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110 * <li>When writing the headers and content of a response</li>
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111 * </ul>
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112 * 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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113 * 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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114 * 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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115 * take many 10s of seconds for large content written to a slow device.
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116 * <p>
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117 * 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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118 * 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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119 *
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120 * @param maxIdleTime
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121 * The maxIdleTime to set.
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122 */
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123 public void setMaxIdleTime(int maxIdleTime)
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124 {
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125 _maxIdleTime = maxIdleTime;
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126 }
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127
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128 /* ------------------------------------------------------------ */
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129 /**
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130 * @return Returns the maxIdleTime when resources are low.
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131 */
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132 public int getLowResourcesMaxIdleTime()
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133 {
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134 return _lowResourceMaxIdleTime;
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135 }
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136
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137 /* ------------------------------------------------------------ */
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138 /**
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139 * @param maxIdleTime
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140 * The maxIdleTime to set when resources are low.
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141 */
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142 public void setLowResourcesMaxIdleTime(int maxIdleTime)
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143 {
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144 _lowResourceMaxIdleTime = maxIdleTime;
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145 }
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146
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147 /* ------------------------------------------------------------ */
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148 /**
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149 * @return Returns the maxIdleTime when resources are low.
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150 * @deprecated
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151 */
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152 @Deprecated
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153 public final int getLowResourceMaxIdleTime()
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154 {
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155 return getLowResourcesMaxIdleTime();
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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 * @param maxIdleTime
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161 * The maxIdleTime to set when resources are low.
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162 * @deprecated
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163 */
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164 @Deprecated
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165 public final void setLowResourceMaxIdleTime(int maxIdleTime)
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166 {
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167 setLowResourcesMaxIdleTime(maxIdleTime);
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168 }
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169
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170 /* ------------------------------------------------------------ */
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171 /**
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172 * @return Returns the soLingerTime.
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173 */
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174 public int getSoLingerTime()
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175 {
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176 return _soLingerTime;
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177 }
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178
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179 /* ------------------------------------------------------------ */
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180 /**
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181 * @return Returns the number of acceptor threads.
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182 */
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183 public int getAcceptors()
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184 {
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185 return _acceptors;
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186 }
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187
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188 /* ------------------------------------------------------------ */
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189 /**
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190 * @param acceptors
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191 * The number of acceptor threads to set.
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192 */
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193 public void setAcceptors(int acceptors)
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194 {
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195 if (acceptors > 2 * Runtime.getRuntime().availableProcessors())
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196 LOG.warn("Acceptors should be <=2*availableProcessors: " + this);
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197 _acceptors = acceptors;
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198 }
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199
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200 /* ------------------------------------------------------------ */
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201 /**
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202 * @param soLingerTime
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203 * The soLingerTime to set or -1 to disable.
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204 */
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205 public void setSoLingerTime(int soLingerTime)
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206 {
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207 _soLingerTime = soLingerTime;
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208 }
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209
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210 @Override
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211 protected void doStart() throws Exception
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212 {
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213 super.doStart();
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214
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215 // Start selector thread
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216 ThreadPoolExecutor _threadPool = server.threadPool;
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217 for (int i = 0; i < _acceptors; i++)
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218 _threadPool.execute(new Acceptor());
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219 if (server.isLowOnThreads())
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220 LOG.warn("insufficient threads configured for {}",this);
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221
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222 LOG.info("Started {}",this);
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223 }
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224
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225 /* ------------------------------------------------------------ */
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226 @Override
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227 protected void doStop() throws Exception
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228 {
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229 try
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230 {
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231 close();
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232 }
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233 catch (IOException e)
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234 {
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235 LOG.warn("",e);
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236 }
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237
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238 super.doStop();
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239 }
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240
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241
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242 /* ------------------------------------------------------------ */
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243 protected void configure(Socket socket) throws IOException
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244 {
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245 try
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246 {
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247 socket.setTcpNoDelay(true);
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248 if (_soLingerTime >= 0)
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249 socket.setSoLinger(true,_soLingerTime / 1000);
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250 else
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251 socket.setSoLinger(false,0);
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252 }
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253 catch (Exception e)
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254 {
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255 LOG.trace("",e);
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256 }
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257 }
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258
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259 public void customize(EndPoint endpoint, Request request) throws IOException
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260 {
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261 }
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262
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263 public void persist(EndPoint endpoint) throws IOException
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264 {
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265 }
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266
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267 public boolean isConfidential(Request request)
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268 {
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269 return false;
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270 }
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271
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272 protected abstract void accept() throws IOException, InterruptedException;
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273
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274 public void stopAccept(int acceptorID) throws Exception
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275 {
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276 }
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277
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278 public int getRequestBufferSize()
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279 {
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280 return _buffers.getRequestBufferSize();
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281 }
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282
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283 public void setRequestBufferSize(int requestBufferSize)
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284 {
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285 _buffers.setRequestBufferSize(requestBufferSize);
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286 }
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287
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288 public int getRequestHeaderSize()
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289 {
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290 return _buffers.getRequestHeaderSize();
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291 }
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292
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293 public void setRequestHeaderSize(int requestHeaderSize)
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294 {
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295 _buffers.setRequestHeaderSize(requestHeaderSize);
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296 }
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297
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298 public int getResponseBufferSize()
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299 {
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300 return _buffers.getResponseBufferSize();
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301 }
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302
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303 public void setResponseBufferSize(int responseBufferSize)
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304 {
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305 _buffers.setResponseBufferSize(responseBufferSize);
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306 }
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307
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308 public int getResponseHeaderSize()
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309 {
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310 return _buffers.getResponseHeaderSize();
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311 }
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312
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313 public void setResponseHeaderSize(int responseHeaderSize)
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314 {
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315 _buffers.setResponseHeaderSize(responseHeaderSize);
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316 }
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317
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318 public Type getRequestBufferType()
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319 {
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320 return _buffers.getRequestBufferType();
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321 }
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322
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323 public Type getRequestHeaderType()
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324 {
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325 return _buffers.getRequestHeaderType();
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326 }
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327
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328 public Type getResponseBufferType()
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329 {
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330 return _buffers.getResponseBufferType();
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331 }
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332
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333 public Type getResponseHeaderType()
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334 {
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335 return _buffers.getResponseHeaderType();
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336 }
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337
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338 public void setRequestBuffers(Buffers requestBuffers)
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339 {
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340 _buffers.setRequestBuffers(requestBuffers);
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341 }
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342
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343 public void setResponseBuffers(Buffers responseBuffers)
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344 {
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345 _buffers.setResponseBuffers(responseBuffers);
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346 }
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347
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348 public Buffers getRequestBuffers()
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349 {
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350 return _buffers.getRequestBuffers();
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351 }
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352
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353 public Buffers getResponseBuffers()
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354 {
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355 return _buffers.getResponseBuffers();
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356 }
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357
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358 public int getMaxBuffers()
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359 {
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360 return _buffers.getMaxBuffers();
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361 }
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362
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363 @Override
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364 public String toString()
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365 {
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366 return String.format("%s@%s:%d",
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367 getClass().getSimpleName(),
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368 getHost()==null?"0.0.0.0":getHost(),
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369 port);
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370 }
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371
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372
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373 private class Acceptor implements Runnable
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374 {
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375
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376 public void run()
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377 {
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378 Thread current = Thread.currentThread();
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379 String name = current.getName();
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380 current.setName(name + " Acceptor" + " " + Connector.this);
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381
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382 try
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383 {
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384 while (isRunning() && _acceptChannel != null)
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385 {
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386 try
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387 {
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388 accept();
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389 }
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390 catch (EofException e)
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391 {
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392 LOG.trace("",e);
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393 }
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394 catch (IOException e)
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395 {
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396 LOG.trace("",e);
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397 }
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398 catch (InterruptedException x)
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399 {
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400 // Connector has been stopped
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401 LOG.trace("",x);
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402 }
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403 catch (Throwable e)
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404 {
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405 LOG.warn("",e);
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406 }
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407 }
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408 }
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409 finally
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410 {
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411 current.setName(name);
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412 }
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413 }
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414 }
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415
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416 public String getName()
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417 {
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418 if (_name == null)
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419 _name = (getHost() == null?"0.0.0.0":getHost()) + ":" + port;
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420 return _name;
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421 }
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422
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423 public final boolean isLowResources()
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424 {
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425 return server.isLowOnThreads();
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426 }
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427
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428 // from old interface
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429 public abstract void close() throws IOException;
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430
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431
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432 // from AbstractNIOConnector
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433
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434 /* ------------------------------------------------------------------------------- */
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435 public boolean getUseDirectBuffers()
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436 {
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437 return getRequestBufferType()==Type.DIRECT;
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438 }
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439
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440 /* ------------------------------------------------------------------------------- */
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441 /**
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442 * @param direct If True (the default), the connector can use NIO direct buffers.
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443 * Some JVMs have memory management issues (bugs) with direct buffers.
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444 */
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445 public void setUseDirectBuffers(boolean direct)
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446 {
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447 _buffers.setRequestBufferType(direct?Type.DIRECT:Type.INDIRECT);
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448 _buffers.setResponseBufferType(direct?Type.DIRECT:Type.INDIRECT);
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449 }
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c60c1adfac3e simplify connectors
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450
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451
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452 // from child classes
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453
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3428c60d7cfc replace jetty jars with source
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454 }