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annotate src/org/eclipse/jetty/server/Server.java @ 867:4f5547d29192

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minor
author Franklin Schmidt <fschmidt@gmail.com>
date Sun, 02 Oct 2016 21:06:18 -0600
parents 6b210bb66c63
children b9aa175d9a29
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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.InetSocketAddress;
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23 import java.util.Enumeration;
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24 import java.util.concurrent.LinkedBlockingQueue;
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25 import java.util.concurrent.ThreadPoolExecutor;
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26 import java.util.concurrent.TimeUnit;
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27
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28 import javax.servlet.ServletException;
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29 import javax.servlet.http.HttpServletRequest;
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30 import javax.servlet.http.HttpServletResponse;
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31
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32 import org.eclipse.jetty.http.HttpGenerator;
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33 import org.eclipse.jetty.http.HttpURI;
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34 import org.eclipse.jetty.server.handler.HandlerWrapper;
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35 import org.eclipse.jetty.server.nio.SelectChannelConnector;
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36 import org.eclipse.jetty.util.Attributes;
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37 import org.eclipse.jetty.util.AttributesMap;
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38 import org.eclipse.jetty.util.LazyList;
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39 import org.eclipse.jetty.util.MultiException;
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40 import org.eclipse.jetty.util.TypeUtil;
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41 import org.eclipse.jetty.util.URIUtil;
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42 import org.eclipse.jetty.util.component.Destroyable;
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43 import org.eclipse.jetty.util.component.LifeCycle;
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44 import org.slf4j.Logger;
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45 import org.slf4j.LoggerFactory;
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46 import org.eclipse.jetty.util.thread.ShutdownThread;
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47
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48 /* ------------------------------------------------------------ */
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49 /** Jetty HTTP Servlet Server.
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50 * This class is the main class for the Jetty HTTP Servlet server.
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51 * It aggregates Connectors (HTTP request receivers) and request Handlers.
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52 * The server is itself a handler and a ThreadPool. Connectors use the ThreadPool methods
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53 * to run jobs that will eventually call the handle method.
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54 *
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55 * @org.apache.xbean.XBean description="Creates an embedded Jetty web server"
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56 */
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57 public class Server extends HandlerWrapper implements Attributes
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58 {
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59 private static final Logger LOG = LoggerFactory.getLogger(Server.class);
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60
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61 private static final String __version = "8";
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62
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63 private final AttributesMap _attributes = new AttributesMap();
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64 private final ThreadPoolExecutor _threadPool;
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65 private Connector[] _connectors;
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66 private boolean _sendServerVersion = true; //send Server: header
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67 private boolean _sendDateHeader = false; //send Date: header
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68 private int _graceful=0;
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69 private boolean _stopAtShutdown;
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70 private boolean _dumpAfterStart=false;
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71 private boolean _dumpBeforeStop=false;
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72 private boolean _uncheckedPrintWriter=false;
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73
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74
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75 /* ------------------------------------------------------------ */
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76 /** Convenience constructor
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77 * Creates server and a {@link SelectChannelConnector} at the passed port.
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78 */
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79 public Server(int port)
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80 {
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81 setServer(this);
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82
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83 Connector connector=new SelectChannelConnector();
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84 connector.setPort(port);
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85 setConnectors(new Connector[]{connector});
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86
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87 _threadPool = new ThreadPoolExecutor(256, 256, 60, TimeUnit.SECONDS, new LinkedBlockingQueue<Runnable>());
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88 }
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89
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90
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91 /* ------------------------------------------------------------ */
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92 public static String getVersion()
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93 {
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94 return __version;
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95 }
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96
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97 /* ------------------------------------------------------------ */
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98 public boolean getStopAtShutdown()
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99 {
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100 return _stopAtShutdown;
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101 }
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102
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103 /* ------------------------------------------------------------ */
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104 public void setStopAtShutdown(boolean stop)
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105 {
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106 //if we now want to stop
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107 if (stop)
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108 {
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109 //and we weren't stopping before
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110 if (!_stopAtShutdown)
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111 {
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112 //only register to stop if we're already started (otherwise we'll do it in doStart())
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113 if (isStarted())
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114 ShutdownThread.register(this);
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115 }
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116 }
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117 else
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118 ShutdownThread.deregister(this);
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119
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120 _stopAtShutdown=stop;
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121 }
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122
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123 /* ------------------------------------------------------------ */
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124 /**
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125 * @return Returns the connectors.
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126 */
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127 public Connector[] getConnectors()
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128 {
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129 return _connectors;
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130 }
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131
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132 /* ------------------------------------------------------------ */
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133 public void addConnector(Connector connector)
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134 {
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135 setConnectors((Connector[])LazyList.addToArray(getConnectors(), connector, Connector.class));
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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 * Conveniance method which calls {@link #getConnectors()} and {@link #setConnectors(Connector[])} to
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141 * remove a connector.
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142 * @param connector The connector to remove.
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143 */
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144 public void removeConnector(Connector connector) {
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145 setConnectors((Connector[])LazyList.removeFromArray (getConnectors(), connector));
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146 }
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147
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148 /* ------------------------------------------------------------ */
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149 /** Set the connectors for this server.
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150 * Each connector has this server set as it's ThreadPool and its Handler.
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151 * @param connectors The connectors to set.
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152 */
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153 public void setConnectors(Connector[] connectors)
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154 {
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155 if (connectors!=null)
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156 {
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157 for (int i=0;i<connectors.length;i++)
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158 connectors[i].setServer(this);
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159 }
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160
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161 _connectors = connectors;
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162 }
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163
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164 /* ------------------------------------------------------------ */
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165 /**
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166 * @return Returns the threadPool.
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167 */
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168 public ThreadPoolExecutor getThreadPool()
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169 {
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170 return _threadPool;
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171 }
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172
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173 /**
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174 * @return true if {@link #dumpStdErr()} is called after starting
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175 */
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176 public boolean isDumpAfterStart()
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177 {
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178 return _dumpAfterStart;
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179 }
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180
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181 /**
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182 * @param dumpAfterStart true if {@link #dumpStdErr()} is called after starting
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183 */
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184 public void setDumpAfterStart(boolean dumpAfterStart)
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185 {
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186 _dumpAfterStart = dumpAfterStart;
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187 }
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188
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189 /**
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190 * @return true if {@link #dumpStdErr()} is called before stopping
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191 */
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192 public boolean isDumpBeforeStop()
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193 {
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194 return _dumpBeforeStop;
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195 }
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196
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197 /**
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198 * @param dumpBeforeStop true if {@link #dumpStdErr()} is called before stopping
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199 */
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200 public void setDumpBeforeStop(boolean dumpBeforeStop)
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201 {
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202 _dumpBeforeStop = dumpBeforeStop;
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203 }
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204
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205
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206
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207 /* ------------------------------------------------------------ */
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208 @Override
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209 protected void doStart() throws Exception
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210 {
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211 if (getStopAtShutdown())
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212 {
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213 ShutdownThread.register(this);
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214 }
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215
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216 ShutdownMonitor.getInstance().start(); // initialize
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217
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218 LOG.info("jetty-"+__version);
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219 HttpGenerator.setServerVersion(__version);
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220
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221 MultiException mex=new MultiException();
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222
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223 try
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224 {
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225 super.doStart();
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226 }
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227 catch(Throwable e)
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228 {
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229 mex.add(e);
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230 }
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231
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232 if (_connectors!=null && mex.size()==0)
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233 {
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234 for (int i=0;i<_connectors.length;i++)
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235 {
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236 try{_connectors[i].start();}
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237 catch(Throwable e)
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238 {
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239 mex.add(e);
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240 }
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241 }
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242 }
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243
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244 if (isDumpAfterStart())
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245 dumpStdErr();
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246
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247 mex.ifExceptionThrow();
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248 }
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249
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250 /* ------------------------------------------------------------ */
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251 @Override
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252 protected void doStop() throws Exception
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253 {
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254 if (isDumpBeforeStop())
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255 dumpStdErr();
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256
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257 MultiException mex=new MultiException();
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258
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259 if (_graceful>0)
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260 {
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261 if (_connectors!=null)
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262 {
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263 for (int i=_connectors.length;i-->0;)
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264 {
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265 LOG.info("Graceful shutdown {}",_connectors[i]);
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266 try{_connectors[i].close();}catch(Throwable e){mex.add(e);}
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267 }
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268 }
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269
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270 Handler[] contexts = getChildHandlersByClass(Graceful.class);
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271 for (int c=0;c<contexts.length;c++)
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272 {
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273 Graceful context=(Graceful)contexts[c];
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274 LOG.info("Graceful shutdown {}",context);
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275 context.setShutdown(true);
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276 }
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277 Thread.sleep(_graceful);
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278 }
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279
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280 if (_connectors!=null)
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281 {
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282 for (int i=_connectors.length;i-->0;)
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283 try{_connectors[i].stop();}catch(Throwable e){mex.add(e);}
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284 }
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285
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286 _threadPool.shutdownNow();
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287
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288 try {super.doStop(); } catch(Throwable e) { mex.add(e);}
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289
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290 mex.ifExceptionThrow();
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291
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292 if (getStopAtShutdown())
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293 ShutdownThread.deregister(this);
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294 }
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295
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296 /* ------------------------------------------------------------ */
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297 /* Handle a request from a connection.
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298 * Called to handle a request on the connection when either the header has been received,
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299 * or after the entire request has been received (for short requests of known length), or
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300 * on the dispatch of an async request.
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301 */
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302 public void handle(AbstractHttpConnection connection) throws IOException, ServletException
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303 {
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304 final String target=connection.getRequest().getPathInfo();
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305 final Request request=connection.getRequest();
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306 final Response response=connection.getResponse();
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307
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308 if (LOG.isDebugEnabled())
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309 {
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310 LOG.debug("REQUEST "+target+" on "+connection);
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311 handle(target, request, request, response);
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312 LOG.debug("RESPONSE "+target+" "+connection.getResponse().getStatus()+" handled="+request.isHandled());
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313 }
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314 else
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315 handle(target, request, request, response);
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316 }
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317
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318 /* ------------------------------------------------------------ */
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319 /* Handle a request from a connection.
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320 * Called to handle a request on the connection when either the header has been received,
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321 * or after the entire request has been received (for short requests of known length), or
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322 * on the dispatch of an async request.
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323 */
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324 public void handleAsync(AbstractHttpConnection connection) throws IOException, ServletException
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325 {
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326 final AsyncContinuation async = connection.getRequest().getAsyncContinuation();
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327 final AsyncContinuation.AsyncEventState state = async.getAsyncEventState();
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328
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329 final Request baseRequest=connection.getRequest();
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330 final String path=state.getPath();
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331
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332 if (path!=null)
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333 {
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334 // this is a dispatch with a path
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335 final String contextPath=state.getServletContext().getContextPath();
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336 HttpURI uri = new HttpURI(URIUtil.addPaths(contextPath,path));
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337 baseRequest.setUri(uri);
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338 baseRequest.setRequestURI(null);
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339 baseRequest.setPathInfo(baseRequest.getRequestURI());
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340 if (uri.getQuery()!=null)
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341 baseRequest.mergeQueryString(uri.getQuery()); //we have to assume dispatch path and query are UTF8
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342 }
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343
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344 final String target=baseRequest.getPathInfo();
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345 final HttpServletRequest request=(HttpServletRequest)async.getRequest();
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346 final HttpServletResponse response=(HttpServletResponse)async.getResponse();
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347
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348 if (LOG.isDebugEnabled())
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349 {
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350 LOG.debug("REQUEST "+target+" on "+connection);
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351 handle(target, baseRequest, request, response);
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352 LOG.debug("RESPONSE "+target+" "+connection.getResponse().getStatus());
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353 }
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354 else
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355 handle(target, baseRequest, request, response);
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356
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357 }
802
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358
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359
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360 /* ------------------------------------------------------------ */
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361 public void join() throws InterruptedException
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362 {
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363 // getThreadPool().join();
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364 _threadPool.awaitTermination(Long.MAX_VALUE, TimeUnit.MILLISECONDS);
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365 }
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366
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367 /* ------------------------------------------------------------ */
802
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368
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369 /* ------------------------------------------------------------ */
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370 public void setSendServerVersion (boolean sendServerVersion)
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371 {
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372 _sendServerVersion = sendServerVersion;
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373 }
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374
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375 /* ------------------------------------------------------------ */
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376 public boolean getSendServerVersion()
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377 {
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378 return _sendServerVersion;
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379 }
802
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380
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381 /* ------------------------------------------------------------ */
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382 /**
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383 * @param sendDateHeader
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384 */
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385 public void setSendDateHeader(boolean sendDateHeader)
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386 {
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387 _sendDateHeader = sendDateHeader;
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388 }
802
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389
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390 /* ------------------------------------------------------------ */
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391 public boolean getSendDateHeader()
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392 {
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393 return _sendDateHeader;
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394 }
802
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395
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396 /* ------------------------------------------------------------ */
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397 /**
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diff changeset
398 */
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399 @Deprecated
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400 public int getMaxCookieVersion()
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401 {
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402 return 1;
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diff changeset
403 }
802
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404
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diff changeset
405 /* ------------------------------------------------------------ */
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diff changeset
406 /**
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diff changeset
407 */
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diff changeset
408 @Deprecated
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diff changeset
409 public void setMaxCookieVersion(int maxCookieVersion)
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diff changeset
410 {
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diff changeset
411 }
802
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412
812
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diff changeset
413 /* ------------------------------------------------------------ */
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diff changeset
414 /*
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415 * @see org.eclipse.util.AttributesMap#clearAttributes()
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416 */
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417 public void clearAttributes()
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diff changeset
418 {
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diff changeset
419 _attributes.clearAttributes();
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420 }
802
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421
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422 /* ------------------------------------------------------------ */
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diff changeset
423 /*
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424 * @see org.eclipse.util.AttributesMap#getAttribute(java.lang.String)
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425 */
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426 public Object getAttribute(String name)
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diff changeset
427 {
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428 return _attributes.getAttribute(name);
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429 }
802
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430
812
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diff changeset
431 /* ------------------------------------------------------------ */
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diff changeset
432 /*
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433 * @see org.eclipse.util.AttributesMap#getAttributeNames()
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diff changeset
434 */
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diff changeset
435 public Enumeration getAttributeNames()
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diff changeset
436 {
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diff changeset
437 return AttributesMap.getAttributeNamesCopy(_attributes);
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diff changeset
438 }
802
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diff changeset
439
812
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diff changeset
440 /* ------------------------------------------------------------ */
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diff changeset
441 /*
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diff changeset
442 * @see org.eclipse.util.AttributesMap#removeAttribute(java.lang.String)
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diff changeset
443 */
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444 public void removeAttribute(String name)
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diff changeset
445 {
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446 _attributes.removeAttribute(name);
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447 }
802
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448
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diff changeset
449 /* ------------------------------------------------------------ */
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diff changeset
450 /*
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diff changeset
451 * @see org.eclipse.util.AttributesMap#setAttribute(java.lang.String, java.lang.Object)
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diff changeset
452 */
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diff changeset
453 public void setAttribute(String name, Object attribute)
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diff changeset
454 {
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diff changeset
455 _attributes.setAttribute(name, attribute);
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456 }
802
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457
812
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diff changeset
458 /* ------------------------------------------------------------ */
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diff changeset
459 /**
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diff changeset
460 * @return the graceful
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diff changeset
461 */
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462 public int getGracefulShutdown()
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diff changeset
463 {
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diff changeset
464 return _graceful;
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diff changeset
465 }
802
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diff changeset
466
812
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diff changeset
467 /* ------------------------------------------------------------ */
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diff changeset
468 /**
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diff changeset
469 * Set graceful shutdown timeout. If set, the internal <code>doStop()</code> method will not immediately stop the
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parents: 802
diff changeset
470 * server. Instead, all {@link Connector}s will be closed so that new connections will not be accepted
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diff changeset
471 * and all handlers that implement {@link Graceful} will be put into the shutdown mode so that no new requests
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parents: 802
diff changeset
472 * will be accepted, but existing requests can complete. The server will then wait the configured timeout
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parents: 802
diff changeset
473 * before stopping.
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parents: 802
diff changeset
474 * @param timeoutMS the milliseconds to wait for existing request to complete before stopping the server.
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parents: 802
diff changeset
475 *
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diff changeset
476 */
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diff changeset
477 public void setGracefulShutdown(int timeoutMS)
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diff changeset
478 {
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diff changeset
479 _graceful=timeoutMS;
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diff changeset
480 }
802
3428c60d7cfc replace jetty jars with source
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diff changeset
481
812
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diff changeset
482 /* ------------------------------------------------------------ */
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diff changeset
483 @Override
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diff changeset
484 public String toString()
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diff changeset
485 {
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diff changeset
486 return this.getClass().getName()+"@"+Integer.toHexString(hashCode());
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diff changeset
487 }
802
3428c60d7cfc replace jetty jars with source
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parents:
diff changeset
488
812
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diff changeset
489 /* ------------------------------------------------------------ */
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diff changeset
490 @Override
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diff changeset
491 public void dump(Appendable out,String indent) throws IOException
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parents: 802
diff changeset
492 {
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diff changeset
493 dumpThis(out);
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diff changeset
494 dump(out,indent,TypeUtil.asList(getHandlers()),getBeans(),TypeUtil.asList(_connectors));
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parents: 802
diff changeset
495 }
802
3428c60d7cfc replace jetty jars with source
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parents:
diff changeset
496
3428c60d7cfc replace jetty jars with source
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parents:
diff changeset
497
812
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diff changeset
498 /* ------------------------------------------------------------ */
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diff changeset
499 public boolean isUncheckedPrintWriter()
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parents: 802
diff changeset
500 {
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parents: 802
diff changeset
501 return _uncheckedPrintWriter;
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parents: 802
diff changeset
502 }
802
3428c60d7cfc replace jetty jars with source
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parents:
diff changeset
503
812
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parents: 802
diff changeset
504 /* ------------------------------------------------------------ */
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parents: 802
diff changeset
505 public void setUncheckedPrintWriter(boolean unchecked)
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parents: 802
diff changeset
506 {
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diff changeset
507 _uncheckedPrintWriter=unchecked;
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parents: 802
diff changeset
508 }
802
3428c60d7cfc replace jetty jars with source
Franklin Schmidt <fschmidt@gmail.com>
parents:
diff changeset
509
3428c60d7cfc replace jetty jars with source
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parents:
diff changeset
510
812
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diff changeset
511 /* ------------------------------------------------------------ */
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diff changeset
512 /* A handler that can be gracefully shutdown.
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parents: 802
diff changeset
513 * Called by doStop if a {@link #setGracefulShutdown} period is set.
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parents: 802
diff changeset
514 * TODO move this somewhere better
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parents: 802
diff changeset
515 */
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diff changeset
516 public interface Graceful extends Handler
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diff changeset
517 {
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diff changeset
518 public void setShutdown(boolean shutdown);
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parents: 802
diff changeset
519 }
802
3428c60d7cfc replace jetty jars with source
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parents:
diff changeset
520
865
6b210bb66c63 remove ThreadPool
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parents: 864
diff changeset
521
6b210bb66c63 remove ThreadPool
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parents: 864
diff changeset
522 public final boolean isLowOnThreads()
6b210bb66c63 remove ThreadPool
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diff changeset
523 {
6b210bb66c63 remove ThreadPool
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524 ThreadPoolExecutor tpe = getThreadPool();
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525 // getActiveCount() locks the thread pool, so execute it last
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526 return tpe.getPoolSize() == tpe.getMaximumPoolSize() &&
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527 tpe.getQueue().size() >= tpe.getPoolSize() - tpe.getActiveCount();
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528 }
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529
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530
812
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531 /* ------------------------------------------------------------ */
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532 public static void main(String...args) throws Exception
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533 {
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534 System.err.println(getVersion());
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535 }
802
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536 }