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annotate src/org/eclipse/jetty/server/Connector.java @ 914:54308d65265a

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author Franklin Schmidt <fschmidt@gmail.com>
date Sun, 09 Oct 2016 01:22:55 -0600
parents 17f4fe8271de
children f5aefdc4a81a
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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 _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 // from child classes
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74 protected transient ServerSocketChannel _acceptChannel;
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75
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76 public Connector(Server server,int port) {
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77 this.server = server;
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78 this.port = port;
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79 server.connectors.add(this);
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80 addBean(_buffers);
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81 _buffers.setRequestBufferType(Type.DIRECT);
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82 _buffers.setRequestHeaderType(Type.INDIRECT);
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83 _buffers.setResponseBufferType(Type.DIRECT);
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84 _buffers.setResponseHeaderType(Type.INDIRECT);
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85 }
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86
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87 public void setHost(String host)
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88 {
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89 _host = host;
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90 }
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91
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92 public String getHost()
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93 {
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94 return _host;
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95 }
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96
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97 public int getMaxIdleTime()
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98 {
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99 return _maxIdleTime;
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100 }
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101
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102 /* ------------------------------------------------------------ */
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103 /**
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104 * 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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105 * other mechanisms may be used to implement the timeout. The max idle time is applied:
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106 * <ul>
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107 * <li>When waiting for a new request to be received on a connection</li>
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108 * <li>When reading the headers and content of a request</li>
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109 * <li>When writing the headers and content of a response</li>
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110 * </ul>
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111 * 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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112 * 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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113 * 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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114 * take many 10s of seconds for large content written to a slow device.
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115 * <p>
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116 * 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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117 * 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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118 *
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119 * @param maxIdleTime
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120 * The maxIdleTime to set.
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121 */
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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 /**
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131 * @return Returns the soLingerTime.
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132 */
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133 public int getSoLingerTime()
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134 {
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135 return _soLingerTime;
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136 }
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137
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138 /* ------------------------------------------------------------ */
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139 /**
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140 * @return Returns the number of acceptor threads.
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141 */
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142 public int getAcceptors()
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143 {
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144 return _acceptors;
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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 * @param acceptors
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150 * The number of acceptor threads to set.
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151 */
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152 public void setAcceptors(int acceptors)
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153 {
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154 if (acceptors > 2 * Runtime.getRuntime().availableProcessors())
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155 LOG.warn("Acceptors should be <=2*availableProcessors: " + this);
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156 _acceptors = acceptors;
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157 }
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158
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159 /* ------------------------------------------------------------ */
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160 /**
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161 * @param soLingerTime
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162 * The soLingerTime to set or -1 to disable.
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163 */
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164 public void setSoLingerTime(int soLingerTime)
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165 {
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166 _soLingerTime = soLingerTime;
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167 }
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168
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169 @Override
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170 protected void doStart() throws Exception
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171 {
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172 super.doStart();
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173
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174 // Start selector thread
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175 ThreadPoolExecutor _threadPool = server.threadPool;
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176 for (int i = 0; i < _acceptors; i++)
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177 _threadPool.execute(new Acceptor());
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178 if (server.isLowOnThreads())
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179 LOG.warn("insufficient threads configured for {}",this);
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180
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181 LOG.info("Started {}",this);
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182 }
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183
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184 @Override
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185 protected synchronized void doStop() throws Exception
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186 {
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187 try
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188 {
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189 if (_acceptChannel != null)
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190 _acceptChannel.close();
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191 _acceptChannel=null;
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192 }
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193 catch (IOException e)
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194 {
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195 LOG.warn("",e);
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196 }
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197
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198 super.doStop();
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199 }
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200
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201
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202 protected final void configure(Socket socket) throws IOException
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203 {
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204 socket.setTcpNoDelay(true);
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205 if (_soLingerTime >= 0)
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206 socket.setSoLinger(true,_soLingerTime / 1000);
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207 else
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208 socket.setSoLinger(false,0);
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209 }
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210
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211 public void customize(EndPoint endpoint, Request request) throws IOException
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212 {
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213 }
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214
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215 public void persist(EndPoint endpoint) throws IOException
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216 {
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217 }
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218
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219 public boolean isConfidential(Request request)
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220 {
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221 return false;
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222 }
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223
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224 protected abstract void accept() throws IOException, InterruptedException;
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225
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226 public void stopAccept(int acceptorID) throws Exception
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227 {
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228 }
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229
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230 public int getRequestBufferSize()
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231 {
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232 return _buffers.getRequestBufferSize();
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233 }
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234
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235 public void setRequestBufferSize(int requestBufferSize)
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236 {
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237 _buffers.setRequestBufferSize(requestBufferSize);
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238 }
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239
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240 public int getRequestHeaderSize()
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241 {
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242 return _buffers.getRequestHeaderSize();
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243 }
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244
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245 public void setRequestHeaderSize(int requestHeaderSize)
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246 {
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247 _buffers.setRequestHeaderSize(requestHeaderSize);
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248 }
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249
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250 public int getResponseBufferSize()
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251 {
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252 return _buffers.getResponseBufferSize();
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253 }
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254
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255 public void setResponseBufferSize(int responseBufferSize)
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256 {
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diff changeset
257 _buffers.setResponseBufferSize(responseBufferSize);
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258 }
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259
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diff changeset
260 public int getResponseHeaderSize()
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261 {
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262 return _buffers.getResponseHeaderSize();
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263 }
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264
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265 public void setResponseHeaderSize(int responseHeaderSize)
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266 {
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diff changeset
267 _buffers.setResponseHeaderSize(responseHeaderSize);
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268 }
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269
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diff changeset
270 public Type getRequestBufferType()
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271 {
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272 return _buffers.getRequestBufferType();
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273 }
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274
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diff changeset
275 public Type getRequestHeaderType()
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276 {
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diff changeset
277 return _buffers.getRequestHeaderType();
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278 }
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279
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diff changeset
280 public Type getResponseBufferType()
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281 {
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282 return _buffers.getResponseBufferType();
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283 }
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284
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diff changeset
285 public Type getResponseHeaderType()
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286 {
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diff changeset
287 return _buffers.getResponseHeaderType();
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288 }
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289
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diff changeset
290 public void setRequestBuffers(Buffers requestBuffers)
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291 {
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diff changeset
292 _buffers.setRequestBuffers(requestBuffers);
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293 }
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294
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diff changeset
295 public void setResponseBuffers(Buffers responseBuffers)
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296 {
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diff changeset
297 _buffers.setResponseBuffers(responseBuffers);
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298 }
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299
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diff changeset
300 public Buffers getRequestBuffers()
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diff changeset
301 {
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diff changeset
302 return _buffers.getRequestBuffers();
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303 }
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304
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diff changeset
305 public Buffers getResponseBuffers()
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diff changeset
306 {
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diff changeset
307 return _buffers.getResponseBuffers();
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diff changeset
308 }
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diff changeset
309
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diff changeset
310 public int getMaxBuffers()
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311 {
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diff changeset
312 return _buffers.getMaxBuffers();
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diff changeset
313 }
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diff changeset
314
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diff changeset
315 @Override
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diff changeset
316 public String toString()
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diff changeset
317 {
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diff changeset
318 return String.format("%s@%s:%d",
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diff changeset
319 getClass().getSimpleName(),
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diff changeset
320 getHost()==null?"0.0.0.0":getHost(),
909
c60c1adfac3e simplify connectors
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diff changeset
321 port);
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150092cebf3e remove AbstractConnector
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diff changeset
322 }
802
3428c60d7cfc replace jetty jars with source
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diff changeset
323
909
c60c1adfac3e simplify connectors
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324
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diff changeset
325 private class Acceptor implements Runnable
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diff changeset
326 {
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diff changeset
327
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diff changeset
328 public void run()
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diff changeset
329 {
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diff changeset
330 Thread current = Thread.currentThread();
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e7175965e6cf remove Connector._acceptorThreads
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diff changeset
331 String name = current.getName();
906
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diff changeset
332 current.setName(name + " Acceptor" + " " + Connector.this);
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diff changeset
333
150092cebf3e remove AbstractConnector
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diff changeset
334 try
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diff changeset
335 {
909
c60c1adfac3e simplify connectors
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parents: 907
diff changeset
336 while (isRunning() && _acceptChannel != null)
885
150092cebf3e remove AbstractConnector
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diff changeset
337 {
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diff changeset
338 try
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diff changeset
339 {
906
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diff changeset
340 accept();
885
150092cebf3e remove AbstractConnector
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diff changeset
341 }
150092cebf3e remove AbstractConnector
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diff changeset
342 catch (EofException e)
150092cebf3e remove AbstractConnector
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diff changeset
343 {
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diff changeset
344 LOG.trace("",e);
150092cebf3e remove AbstractConnector
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diff changeset
345 }
150092cebf3e remove AbstractConnector
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diff changeset
346 catch (IOException e)
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347 {
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348 LOG.trace("",e);
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349 }
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350 catch (InterruptedException x)
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351 {
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352 // Connector has been stopped
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353 LOG.trace("",x);
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354 }
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355 catch (Throwable e)
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356 {
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357 LOG.warn("",e);
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358 }
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359 }
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360 }
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361 finally
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362 {
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363 current.setName(name);
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364 }
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365 }
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366 }
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367
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368 public String getName()
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369 {
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370 if (_name == null)
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371 _name = (getHost() == null?"0.0.0.0":getHost()) + ":" + port;
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372 return _name;
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373 }
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374
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375 public final boolean isLowResources()
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376 {
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377 return server.isLowOnThreads();
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378 }
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379
907
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380
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381 // from AbstractNIOConnector
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382
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383 /* ------------------------------------------------------------------------------- */
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384 public boolean getUseDirectBuffers()
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385 {
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386 return getRequestBufferType()==Type.DIRECT;
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387 }
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388
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389 /* ------------------------------------------------------------------------------- */
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390 /**
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391 * @param direct If True (the default), the connector can use NIO direct buffers.
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392 * Some JVMs have memory management issues (bugs) with direct buffers.
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393 */
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394 public void setUseDirectBuffers(boolean direct)
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395 {
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396 _buffers.setRequestBufferType(direct?Type.DIRECT:Type.INDIRECT);
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397 _buffers.setResponseBufferType(direct?Type.DIRECT:Type.INDIRECT);
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398 }
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399
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400
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401 // from child classes
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402
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403 }