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annotate src/org/eclipse/jetty/server/Server.java @ 877:fef4392f4905

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remove sendServerVersion
author Franklin Schmidt <fschmidt@gmail.com>
date Tue, 04 Oct 2016 14:36:51 -0600
parents 2efdb98f3543
children 5f8a242392da
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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.Collections;
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24 import java.util.Enumeration;
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25 import java.util.concurrent.LinkedBlockingQueue;
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26 import java.util.concurrent.ThreadPoolExecutor;
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27 import java.util.concurrent.TimeUnit;
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28
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29 import javax.servlet.ServletException;
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30 import javax.servlet.http.HttpServletRequest;
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31 import javax.servlet.http.HttpServletResponse;
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32
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33 import org.eclipse.jetty.http.HttpGenerator;
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34 import org.eclipse.jetty.http.HttpURI;
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35 import org.eclipse.jetty.server.handler.HandlerWrapper;
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36 import org.eclipse.jetty.server.nio.SelectChannelConnector;
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37 import org.eclipse.jetty.util.Attributes;
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38 import org.eclipse.jetty.util.AttributesMap;
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39 import org.eclipse.jetty.util.LazyList;
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40 import org.eclipse.jetty.util.MultiException;
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41 import org.eclipse.jetty.util.TypeUtil;
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42 import org.eclipse.jetty.util.URIUtil;
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43 import org.eclipse.jetty.util.component.Destroyable;
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44 import org.eclipse.jetty.util.component.LifeCycle;
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45 import org.slf4j.Logger;
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46 import org.slf4j.LoggerFactory;
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47 import org.eclipse.jetty.util.thread.ShutdownThread;
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48
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49 /* ------------------------------------------------------------ */
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50 /** Jetty HTTP Servlet Server.
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51 * This class is the main class for the Jetty HTTP Servlet server.
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52 * It aggregates Connectors (HTTP request receivers) and request Handlers.
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53 * The server is itself a handler and a ThreadPool. Connectors use the ThreadPool methods
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54 * to run jobs that will eventually call the handle method.
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55 *
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56 * @org.apache.xbean.XBean description="Creates an embedded Jetty web server"
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57 */
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58 public class Server extends HandlerWrapper implements Attributes
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59 {
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60 private static final Logger LOG = LoggerFactory.getLogger(Server.class);
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61
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62 private static final String __version = "8";
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63
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64 private final AttributesMap _attributes = new AttributesMap();
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65 public final ThreadPoolExecutor threadPool;
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66 public final Connector connector;
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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 = new SelectChannelConnector();
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84 connector.setPort(port);
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85 connector.setServer(this);
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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 * @return true if {@link #dumpStdErr()} is called after starting
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125 */
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126 public boolean isDumpAfterStart()
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127 {
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128 return _dumpAfterStart;
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129 }
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130
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131 /**
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132 * @param dumpAfterStart true if {@link #dumpStdErr()} is called after starting
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133 */
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134 public void setDumpAfterStart(boolean dumpAfterStart)
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135 {
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136 _dumpAfterStart = dumpAfterStart;
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137 }
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138
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139 /**
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140 * @return true if {@link #dumpStdErr()} is called before stopping
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141 */
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142 public boolean isDumpBeforeStop()
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143 {
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144 return _dumpBeforeStop;
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145 }
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146
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147 /**
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148 * @param dumpBeforeStop true if {@link #dumpStdErr()} is called before stopping
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149 */
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150 public void setDumpBeforeStop(boolean dumpBeforeStop)
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151 {
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152 _dumpBeforeStop = dumpBeforeStop;
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153 }
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154
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155
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156
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157 /* ------------------------------------------------------------ */
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158 @Override
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159 protected void doStart() throws Exception
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160 {
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161 if (getStopAtShutdown())
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162 {
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163 ShutdownThread.register(this);
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164 }
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165
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166 ShutdownMonitor.getInstance().start(); // initialize
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167
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168 LOG.info("jetty-"+__version);
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169 HttpGenerator.setServerVersion(__version);
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170
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171 MultiException mex=new MultiException();
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172
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173 try
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174 {
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175 super.doStart();
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176 }
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177 catch(Throwable e)
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178 {
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179 mex.add(e);
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180 }
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181
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182 if (mex.size()==0)
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183 {
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184 try{connector.start();}
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185 catch(Throwable e)
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186 {
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187 mex.add(e);
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188 }
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189 }
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190
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191 if (isDumpAfterStart())
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192 dumpStdErr();
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193
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194 mex.ifExceptionThrow();
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195 }
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196
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197 /* ------------------------------------------------------------ */
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198 @Override
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199 protected void doStop() throws Exception
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200 {
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201 if (isDumpBeforeStop())
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202 dumpStdErr();
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203
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204 MultiException mex=new MultiException();
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205
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206 if (_graceful>0)
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207 {
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208 LOG.info("Graceful shutdown {}",connector);
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209 try{connector.close();}catch(Throwable e){mex.add(e);}
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210
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211 Handler[] contexts = getChildHandlersByClass(Graceful.class);
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212 for (int c=0;c<contexts.length;c++)
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213 {
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214 Graceful context=(Graceful)contexts[c];
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215 LOG.info("Graceful shutdown {}",context);
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216 context.setShutdown(true);
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217 }
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218 Thread.sleep(_graceful);
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219 }
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220
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221 try{connector.stop();}catch(Throwable e){mex.add(e);}
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222
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223 threadPool.shutdownNow();
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224
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225 try {super.doStop(); } catch(Throwable e) { mex.add(e);}
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226
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227 mex.ifExceptionThrow();
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228
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229 if (getStopAtShutdown())
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230 ShutdownThread.deregister(this);
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231 }
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232
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233 /* ------------------------------------------------------------ */
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234 /* Handle a request from a connection.
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235 * Called to handle a request on the connection when either the header has been received,
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236 * or after the entire request has been received (for short requests of known length), or
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237 * on the dispatch of an async request.
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238 */
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239 public void handle(AbstractHttpConnection connection) throws IOException, ServletException
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240 {
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241 final String target=connection.getRequest().getPathInfo();
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242 final Request request=connection.getRequest();
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243 final Response response=connection.getResponse();
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244
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245 if (LOG.isDebugEnabled())
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246 {
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247 LOG.debug("REQUEST "+target+" on "+connection);
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248 handle(target, request, request, response);
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249 LOG.debug("RESPONSE "+target+" "+connection.getResponse().getStatus()+" handled="+request.isHandled());
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250 }
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251 else
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252 handle(target, request, request, response);
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253 }
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254
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255 /* ------------------------------------------------------------ */
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256 /* Handle a request from a connection.
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257 * Called to handle a request on the connection when either the header has been received,
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258 * or after the entire request has been received (for short requests of known length), or
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259 * on the dispatch of an async request.
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260 */
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261 public void handleAsync(AbstractHttpConnection connection) throws IOException, ServletException
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262 {
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263 final AsyncContinuation async = connection.getRequest().getAsyncContinuation();
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264 final AsyncContinuation.AsyncEventState state = async.getAsyncEventState();
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265
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266 final Request baseRequest=connection.getRequest();
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267 final String path=state.getPath();
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268
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269 if (path!=null)
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270 {
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271 // this is a dispatch with a path
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272 final String contextPath=state.getServletContext().getContextPath();
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273 HttpURI uri = new HttpURI(URIUtil.addPaths(contextPath,path));
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274 baseRequest.setUri(uri);
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275 baseRequest.setRequestURI(null);
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276 baseRequest.setPathInfo(baseRequest.getRequestURI());
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277 if (uri.getQuery()!=null)
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278 baseRequest.mergeQueryString(uri.getQuery()); //we have to assume dispatch path and query are UTF8
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279 }
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280
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281 final String target=baseRequest.getPathInfo();
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282 final HttpServletRequest request=(HttpServletRequest)async.getRequest();
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283 final HttpServletResponse response=(HttpServletResponse)async.getResponse();
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284
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285 if (LOG.isDebugEnabled())
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286 {
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287 LOG.debug("REQUEST "+target+" on "+connection);
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288 handle(target, baseRequest, request, response);
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289 LOG.debug("RESPONSE "+target+" "+connection.getResponse().getStatus());
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290 }
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291 else
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292 handle(target, baseRequest, request, response);
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293
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294 }
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295
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296
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297 /* ------------------------------------------------------------ */
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298 public void join() throws InterruptedException
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299 {
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300 threadPool.awaitTermination(Long.MAX_VALUE, TimeUnit.MILLISECONDS);
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301 }
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302
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303 /* ------------------------------------------------------------ */
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304 /**
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305 * @param sendDateHeader
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306 */
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307 public void setSendDateHeader(boolean sendDateHeader)
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308 {
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309 _sendDateHeader = sendDateHeader;
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310 }
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311
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312 /* ------------------------------------------------------------ */
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313 public boolean getSendDateHeader()
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314 {
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315 return _sendDateHeader;
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316 }
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317
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318 /* ------------------------------------------------------------ */
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319 /**
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320 */
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321 @Deprecated
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322 public int getMaxCookieVersion()
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323 {
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324 return 1;
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325 }
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326
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327 /* ------------------------------------------------------------ */
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328 /**
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329 */
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330 @Deprecated
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331 public void setMaxCookieVersion(int maxCookieVersion)
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332 {
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333 }
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334
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335 /* ------------------------------------------------------------ */
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336 /*
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337 * @see org.eclipse.util.AttributesMap#clearAttributes()
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338 */
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339 public void clearAttributes()
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340 {
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341 _attributes.clearAttributes();
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342 }
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343
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344 /* ------------------------------------------------------------ */
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345 /*
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346 * @see org.eclipse.util.AttributesMap#getAttribute(java.lang.String)
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347 */
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348 public Object getAttribute(String name)
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349 {
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350 return _attributes.getAttribute(name);
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351 }
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352
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353 /* ------------------------------------------------------------ */
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354 /*
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355 * @see org.eclipse.util.AttributesMap#getAttributeNames()
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356 */
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357 public Enumeration getAttributeNames()
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358 {
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359 return AttributesMap.getAttributeNamesCopy(_attributes);
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360 }
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361
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362 /* ------------------------------------------------------------ */
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363 /*
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364 * @see org.eclipse.util.AttributesMap#removeAttribute(java.lang.String)
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365 */
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366 public void removeAttribute(String name)
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367 {
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368 _attributes.removeAttribute(name);
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369 }
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370
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371 /* ------------------------------------------------------------ */
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372 /*
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373 * @see org.eclipse.util.AttributesMap#setAttribute(java.lang.String, java.lang.Object)
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374 */
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375 public void setAttribute(String name, Object attribute)
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376 {
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377 _attributes.setAttribute(name, attribute);
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378 }
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379
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380 /* ------------------------------------------------------------ */
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381 /**
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382 * @return the graceful
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383 */
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384 public int getGracefulShutdown()
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385 {
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386 return _graceful;
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387 }
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388
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389 /* ------------------------------------------------------------ */
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390 /**
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391 * Set graceful shutdown timeout. If set, the internal <code>doStop()</code> method will not immediately stop the
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392 * server. Instead, all {@link Connector}s will be closed so that new connections will not be accepted
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393 * and all handlers that implement {@link Graceful} will be put into the shutdown mode so that no new requests
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394 * will be accepted, but existing requests can complete. The server will then wait the configured timeout
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395 * before stopping.
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396 * @param timeoutMS the milliseconds to wait for existing request to complete before stopping the server.
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397 *
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398 */
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399 public void setGracefulShutdown(int timeoutMS)
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400 {
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401 _graceful=timeoutMS;
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402 }
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403
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404 /* ------------------------------------------------------------ */
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405 @Override
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406 public String toString()
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407 {
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408 return this.getClass().getName()+"@"+Integer.toHexString(hashCode());
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409 }
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410
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411 /* ------------------------------------------------------------ */
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412 @Override
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413 public void dump(Appendable out,String indent) throws IOException
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414 {
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415 dumpThis(out);
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416 dump(out,indent,TypeUtil.asList(getHandlers()),getBeans(),Collections.singletonList(connector));
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417 }
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418
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419
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420 /* ------------------------------------------------------------ */
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421 public boolean isUncheckedPrintWriter()
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422 {
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423 return _uncheckedPrintWriter;
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424 }
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425
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426 /* ------------------------------------------------------------ */
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427 public void setUncheckedPrintWriter(boolean unchecked)
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428 {
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429 _uncheckedPrintWriter=unchecked;
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430 }
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431
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432
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433 /* ------------------------------------------------------------ */
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434 /* A handler that can be gracefully shutdown.
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435 * Called by doStop if a {@link #setGracefulShutdown} period is set.
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436 * TODO move this somewhere better
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437 */
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438 public interface Graceful extends Handler
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439 {
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440 public void setShutdown(boolean shutdown);
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441 }
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442
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443
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444 public final boolean isLowOnThreads()
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445 {
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446 // getActiveCount() locks the thread pool, so execute it last
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447 return threadPool.getPoolSize() == threadPool.getMaximumPoolSize() &&
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448 threadPool.getQueue().size() >= threadPool.getPoolSize() - threadPool.getActiveCount();
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449 }
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450
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451
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452 /* ------------------------------------------------------------ */
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453 public static void main(String...args) throws Exception
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454 {
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455 System.err.println(getVersion());
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456 }
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457 }