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annotate src/org/eclipse/jetty/server/Server.java @ 865:6b210bb66c63

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remove ThreadPool
author Franklin Schmidt <fschmidt@gmail.com>
date Sun, 02 Oct 2016 20:38:06 -0600
parents e21ca9878a10
children 4f5547d29192
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rev   line source
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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 addBean(_threadPool);
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89 }
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90
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91
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92 /* ------------------------------------------------------------ */
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93 public static String getVersion()
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94 {
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95 return __version;
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96 }
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97
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98 /* ------------------------------------------------------------ */
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99 public boolean getStopAtShutdown()
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100 {
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101 return _stopAtShutdown;
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102 }
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103
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104 /* ------------------------------------------------------------ */
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105 public void setStopAtShutdown(boolean stop)
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106 {
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107 //if we now want to stop
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108 if (stop)
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109 {
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110 //and we weren't stopping before
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111 if (!_stopAtShutdown)
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112 {
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113 //only register to stop if we're already started (otherwise we'll do it in doStart())
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114 if (isStarted())
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115 ShutdownThread.register(this);
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116 }
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117 }
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118 else
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119 ShutdownThread.deregister(this);
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120
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121 _stopAtShutdown=stop;
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122 }
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123
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124 /* ------------------------------------------------------------ */
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125 /**
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126 * @return Returns the connectors.
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127 */
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128 public Connector[] getConnectors()
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129 {
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130 return _connectors;
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131 }
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132
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133 /* ------------------------------------------------------------ */
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134 public void addConnector(Connector connector)
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135 {
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136 setConnectors((Connector[])LazyList.addToArray(getConnectors(), connector, Connector.class));
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137 }
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138
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139 /* ------------------------------------------------------------ */
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140 /**
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141 * Conveniance method which calls {@link #getConnectors()} and {@link #setConnectors(Connector[])} to
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142 * remove a connector.
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143 * @param connector The connector to remove.
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144 */
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145 public void removeConnector(Connector connector) {
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146 setConnectors((Connector[])LazyList.removeFromArray (getConnectors(), connector));
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147 }
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148
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149 /* ------------------------------------------------------------ */
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150 /** Set the connectors for this server.
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151 * Each connector has this server set as it's ThreadPool and its Handler.
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152 * @param connectors The connectors to set.
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153 */
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154 public void setConnectors(Connector[] connectors)
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155 {
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156 if (connectors!=null)
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157 {
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158 for (int i=0;i<connectors.length;i++)
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159 connectors[i].setServer(this);
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160 }
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161
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162 _connectors = connectors;
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163 }
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164
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165 /* ------------------------------------------------------------ */
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166 /**
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167 * @return Returns the threadPool.
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168 */
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169 public ThreadPoolExecutor getThreadPool()
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170 {
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171 return _threadPool;
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172 }
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173
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174 /**
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175 * @return true if {@link #dumpStdErr()} is called after starting
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176 */
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177 public boolean isDumpAfterStart()
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178 {
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179 return _dumpAfterStart;
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180 }
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181
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182 /**
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183 * @param dumpAfterStart true if {@link #dumpStdErr()} is called after starting
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184 */
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185 public void setDumpAfterStart(boolean dumpAfterStart)
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186 {
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187 _dumpAfterStart = dumpAfterStart;
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188 }
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189
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190 /**
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191 * @return true if {@link #dumpStdErr()} is called before stopping
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192 */
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193 public boolean isDumpBeforeStop()
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194 {
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195 return _dumpBeforeStop;
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196 }
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197
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198 /**
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199 * @param dumpBeforeStop true if {@link #dumpStdErr()} is called before stopping
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200 */
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201 public void setDumpBeforeStop(boolean dumpBeforeStop)
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202 {
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203 _dumpBeforeStop = dumpBeforeStop;
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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 /* ------------------------------------------------------------ */
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209 @Override
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210 protected void doStart() throws Exception
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211 {
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212 if (getStopAtShutdown())
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213 {
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214 ShutdownThread.register(this);
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215 }
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216
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217 ShutdownMonitor.getInstance().start(); // initialize
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218
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219 LOG.info("jetty-"+__version);
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220 HttpGenerator.setServerVersion(__version);
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221
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222 MultiException mex=new MultiException();
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223
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224 try
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225 {
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226 super.doStart();
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227 }
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228 catch(Throwable e)
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229 {
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230 mex.add(e);
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231 }
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232
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233 if (_connectors!=null && mex.size()==0)
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234 {
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235 for (int i=0;i<_connectors.length;i++)
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236 {
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237 try{_connectors[i].start();}
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238 catch(Throwable e)
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239 {
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240 mex.add(e);
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241 }
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242 }
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243 }
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244
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245 if (isDumpAfterStart())
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246 dumpStdErr();
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247
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248 mex.ifExceptionThrow();
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249 }
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250
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251 /* ------------------------------------------------------------ */
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252 @Override
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253 protected void doStop() throws Exception
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254 {
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255 if (isDumpBeforeStop())
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256 dumpStdErr();
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257
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258 MultiException mex=new MultiException();
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259
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260 if (_graceful>0)
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261 {
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262 if (_connectors!=null)
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263 {
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264 for (int i=_connectors.length;i-->0;)
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265 {
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266 LOG.info("Graceful shutdown {}",_connectors[i]);
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267 try{_connectors[i].close();}catch(Throwable e){mex.add(e);}
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268 }
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269 }
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270
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271 Handler[] contexts = getChildHandlersByClass(Graceful.class);
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272 for (int c=0;c<contexts.length;c++)
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273 {
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274 Graceful context=(Graceful)contexts[c];
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275 LOG.info("Graceful shutdown {}",context);
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276 context.setShutdown(true);
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277 }
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278 Thread.sleep(_graceful);
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279 }
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280
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281 if (_connectors!=null)
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282 {
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283 for (int i=_connectors.length;i-->0;)
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284 try{_connectors[i].stop();}catch(Throwable e){mex.add(e);}
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285 }
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286
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287 try {super.doStop(); } catch(Throwable e) { mex.add(e);}
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288
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289 mex.ifExceptionThrow();
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290
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291 if (getStopAtShutdown())
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292 ShutdownThread.deregister(this);
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293 }
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294
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295 /* ------------------------------------------------------------ */
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296 /* Handle a request from a connection.
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297 * Called to handle a request on the connection when either the header has been received,
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298 * or after the entire request has been received (for short requests of known length), or
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299 * on the dispatch of an async request.
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300 */
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301 public void handle(AbstractHttpConnection connection) throws IOException, ServletException
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302 {
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303 final String target=connection.getRequest().getPathInfo();
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304 final Request request=connection.getRequest();
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305 final Response response=connection.getResponse();
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306
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307 if (LOG.isDebugEnabled())
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308 {
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309 LOG.debug("REQUEST "+target+" on "+connection);
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310 handle(target, request, request, response);
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311 LOG.debug("RESPONSE "+target+" "+connection.getResponse().getStatus()+" handled="+request.isHandled());
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312 }
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313 else
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314 handle(target, request, request, response);
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315 }
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316
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317 /* ------------------------------------------------------------ */
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318 /* Handle a request from a connection.
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319 * Called to handle a request on the connection when either the header has been received,
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320 * or after the entire request has been received (for short requests of known length), or
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321 * on the dispatch of an async request.
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322 */
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323 public void handleAsync(AbstractHttpConnection connection) throws IOException, ServletException
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324 {
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325 final AsyncContinuation async = connection.getRequest().getAsyncContinuation();
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326 final AsyncContinuation.AsyncEventState state = async.getAsyncEventState();
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327
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328 final Request baseRequest=connection.getRequest();
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329 final String path=state.getPath();
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330
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331 if (path!=null)
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332 {
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333 // this is a dispatch with a path
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334 final String contextPath=state.getServletContext().getContextPath();
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335 HttpURI uri = new HttpURI(URIUtil.addPaths(contextPath,path));
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336 baseRequest.setUri(uri);
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337 baseRequest.setRequestURI(null);
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338 baseRequest.setPathInfo(baseRequest.getRequestURI());
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339 if (uri.getQuery()!=null)
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340 baseRequest.mergeQueryString(uri.getQuery()); //we have to assume dispatch path and query are UTF8
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341 }
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342
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343 final String target=baseRequest.getPathInfo();
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344 final HttpServletRequest request=(HttpServletRequest)async.getRequest();
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345 final HttpServletResponse response=(HttpServletResponse)async.getResponse();
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346
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347 if (LOG.isDebugEnabled())
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348 {
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349 LOG.debug("REQUEST "+target+" on "+connection);
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350 handle(target, baseRequest, request, response);
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351 LOG.debug("RESPONSE "+target+" "+connection.getResponse().getStatus());
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352 }
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353 else
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354 handle(target, baseRequest, request, response);
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355
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356 }
802
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357
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358
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359 /* ------------------------------------------------------------ */
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360 public void join() throws InterruptedException
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361 {
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362 // getThreadPool().join();
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363 _threadPool.awaitTermination(Long.MAX_VALUE, TimeUnit.MILLISECONDS);
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364 }
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365
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366 /* ------------------------------------------------------------ */
802
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367
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368 /* ------------------------------------------------------------ */
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369 public void setSendServerVersion (boolean sendServerVersion)
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370 {
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371 _sendServerVersion = sendServerVersion;
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372 }
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373
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374 /* ------------------------------------------------------------ */
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375 public boolean getSendServerVersion()
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376 {
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377 return _sendServerVersion;
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378 }
802
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379
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380 /* ------------------------------------------------------------ */
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381 /**
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382 * @param sendDateHeader
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383 */
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384 public void setSendDateHeader(boolean sendDateHeader)
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385 {
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386 _sendDateHeader = sendDateHeader;
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387 }
802
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388
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diff changeset
389 /* ------------------------------------------------------------ */
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390 public boolean getSendDateHeader()
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391 {
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392 return _sendDateHeader;
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393 }
802
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394
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395 /* ------------------------------------------------------------ */
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396 /**
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diff changeset
397 */
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398 @Deprecated
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399 public int getMaxCookieVersion()
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400 {
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401 return 1;
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diff changeset
402 }
802
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403
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diff changeset
404 /* ------------------------------------------------------------ */
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diff changeset
405 /**
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diff changeset
406 */
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diff changeset
407 @Deprecated
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diff changeset
408 public void setMaxCookieVersion(int maxCookieVersion)
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diff changeset
409 {
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diff changeset
410 }
802
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diff changeset
411
812
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diff changeset
412 /* ------------------------------------------------------------ */
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diff changeset
413 /*
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414 * @see org.eclipse.util.AttributesMap#clearAttributes()
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415 */
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416 public void clearAttributes()
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diff changeset
417 {
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diff changeset
418 _attributes.clearAttributes();
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419 }
802
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420
812
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diff changeset
421 /* ------------------------------------------------------------ */
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diff changeset
422 /*
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423 * @see org.eclipse.util.AttributesMap#getAttribute(java.lang.String)
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424 */
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425 public Object getAttribute(String name)
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diff changeset
426 {
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427 return _attributes.getAttribute(name);
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428 }
802
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429
812
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diff changeset
430 /* ------------------------------------------------------------ */
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diff changeset
431 /*
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432 * @see org.eclipse.util.AttributesMap#getAttributeNames()
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diff changeset
433 */
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diff changeset
434 public Enumeration getAttributeNames()
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diff changeset
435 {
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diff changeset
436 return AttributesMap.getAttributeNamesCopy(_attributes);
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diff changeset
437 }
802
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438
812
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diff changeset
439 /* ------------------------------------------------------------ */
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parents: 802
diff changeset
440 /*
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diff changeset
441 * @see org.eclipse.util.AttributesMap#removeAttribute(java.lang.String)
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diff changeset
442 */
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443 public void removeAttribute(String name)
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diff changeset
444 {
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445 _attributes.removeAttribute(name);
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diff changeset
446 }
802
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447
812
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diff changeset
448 /* ------------------------------------------------------------ */
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diff changeset
449 /*
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diff changeset
450 * @see org.eclipse.util.AttributesMap#setAttribute(java.lang.String, java.lang.Object)
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diff changeset
451 */
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diff changeset
452 public void setAttribute(String name, Object attribute)
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diff changeset
453 {
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454 _attributes.setAttribute(name, attribute);
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455 }
802
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456
812
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diff changeset
457 /* ------------------------------------------------------------ */
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diff changeset
458 /**
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diff changeset
459 * @return the graceful
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diff changeset
460 */
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diff changeset
461 public int getGracefulShutdown()
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diff changeset
462 {
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diff changeset
463 return _graceful;
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diff changeset
464 }
802
3428c60d7cfc replace jetty jars with source
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diff changeset
465
812
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diff changeset
466 /* ------------------------------------------------------------ */
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diff changeset
467 /**
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diff changeset
468 * Set graceful shutdown timeout. If set, the internal <code>doStop()</code> method will not immediately stop the
700317ba03ad remove SessionIdManager
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parents: 802
diff changeset
469 * server. Instead, all {@link Connector}s will be closed so that new connections will not be accepted
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parents: 802
diff changeset
470 * 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
471 * will be accepted, but existing requests can complete. The server will then wait the configured timeout
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parents: 802
diff changeset
472 * before stopping.
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parents: 802
diff changeset
473 * @param timeoutMS the milliseconds to wait for existing request to complete before stopping the server.
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parents: 802
diff changeset
474 *
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parents: 802
diff changeset
475 */
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parents: 802
diff changeset
476 public void setGracefulShutdown(int timeoutMS)
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parents: 802
diff changeset
477 {
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diff changeset
478 _graceful=timeoutMS;
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diff changeset
479 }
802
3428c60d7cfc replace jetty jars with source
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parents:
diff changeset
480
812
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parents: 802
diff changeset
481 /* ------------------------------------------------------------ */
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diff changeset
482 @Override
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diff changeset
483 public String toString()
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parents: 802
diff changeset
484 {
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parents: 802
diff changeset
485 return this.getClass().getName()+"@"+Integer.toHexString(hashCode());
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parents: 802
diff changeset
486 }
802
3428c60d7cfc replace jetty jars with source
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parents:
diff changeset
487
812
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parents: 802
diff changeset
488 /* ------------------------------------------------------------ */
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diff changeset
489 @Override
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diff changeset
490 public void dump(Appendable out,String indent) throws IOException
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parents: 802
diff changeset
491 {
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diff changeset
492 dumpThis(out);
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parents: 802
diff changeset
493 dump(out,indent,TypeUtil.asList(getHandlers()),getBeans(),TypeUtil.asList(_connectors));
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parents: 802
diff changeset
494 }
802
3428c60d7cfc replace jetty jars with source
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parents:
diff changeset
495
3428c60d7cfc replace jetty jars with source
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parents:
diff changeset
496
812
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diff changeset
497 /* ------------------------------------------------------------ */
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parents: 802
diff changeset
498 public boolean isUncheckedPrintWriter()
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parents: 802
diff changeset
499 {
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parents: 802
diff changeset
500 return _uncheckedPrintWriter;
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parents: 802
diff changeset
501 }
802
3428c60d7cfc replace jetty jars with source
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parents:
diff changeset
502
812
700317ba03ad remove SessionIdManager
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parents: 802
diff changeset
503 /* ------------------------------------------------------------ */
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parents: 802
diff changeset
504 public void setUncheckedPrintWriter(boolean unchecked)
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parents: 802
diff changeset
505 {
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parents: 802
diff changeset
506 _uncheckedPrintWriter=unchecked;
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parents: 802
diff changeset
507 }
802
3428c60d7cfc replace jetty jars with source
Franklin Schmidt <fschmidt@gmail.com>
parents:
diff changeset
508
3428c60d7cfc replace jetty jars with source
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parents:
diff changeset
509
812
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parents: 802
diff changeset
510 /* ------------------------------------------------------------ */
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parents: 802
diff changeset
511 /* A handler that can be gracefully shutdown.
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parents: 802
diff changeset
512 * Called by doStop if a {@link #setGracefulShutdown} period is set.
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parents: 802
diff changeset
513 * TODO move this somewhere better
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parents: 802
diff changeset
514 */
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parents: 802
diff changeset
515 public interface Graceful extends Handler
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diff changeset
516 {
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parents: 802
diff changeset
517 public void setShutdown(boolean shutdown);
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parents: 802
diff changeset
518 }
802
3428c60d7cfc replace jetty jars with source
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parents:
diff changeset
519
865
6b210bb66c63 remove ThreadPool
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parents: 864
diff changeset
520
6b210bb66c63 remove ThreadPool
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parents: 864
diff changeset
521 public final boolean isLowOnThreads()
6b210bb66c63 remove ThreadPool
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diff changeset
522 {
6b210bb66c63 remove ThreadPool
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523 ThreadPoolExecutor tpe = getThreadPool();
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524 // getActiveCount() locks the thread pool, so execute it last
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525 return tpe.getPoolSize() == tpe.getMaximumPoolSize() &&
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526 tpe.getQueue().size() >= tpe.getPoolSize() - tpe.getActiveCount();
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527 }
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528
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529
812
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530 /* ------------------------------------------------------------ */
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531 public static void main(String...args) throws Exception
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532 {
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533 System.err.println(getVersion());
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534 }
802
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535 }