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annotate src/org/eclipse/jetty/server/Server.java @ 878:5f8a242392da

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remove sendDateHeader
author Franklin Schmidt <fschmidt@gmail.com>
date Tue, 04 Oct 2016 14:50:32 -0600
parents fef4392f4905
children a3775d0c6985
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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 int _graceful=0;
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68 private boolean _stopAtShutdown;
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69 private boolean _dumpAfterStart=false;
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70 private boolean _dumpBeforeStop=false;
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71 private boolean _uncheckedPrintWriter=false;
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73
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74 /* ------------------------------------------------------------ */
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75 /** Convenience constructor
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76 * Creates server and a {@link SelectChannelConnector} at the passed port.
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77 */
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78 public Server(int port)
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79 {
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80 setServer(this);
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81
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82 connector = new SelectChannelConnector();
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83 connector.setPort(port);
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84 connector.setServer(this);
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85
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86 threadPool = new ThreadPoolExecutor(256, 256, 60, TimeUnit.SECONDS, new LinkedBlockingQueue<Runnable>());
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87 }
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88
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89
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90 /* ------------------------------------------------------------ */
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91 public static String getVersion()
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92 {
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93 return __version;
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94 }
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95
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96 /* ------------------------------------------------------------ */
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97 public boolean getStopAtShutdown()
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98 {
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99 return _stopAtShutdown;
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100 }
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101
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102 /* ------------------------------------------------------------ */
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103 public void setStopAtShutdown(boolean stop)
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104 {
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105 //if we now want to stop
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106 if (stop)
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107 {
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108 //and we weren't stopping before
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109 if (!_stopAtShutdown)
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110 {
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111 //only register to stop if we're already started (otherwise we'll do it in doStart())
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112 if (isStarted())
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113 ShutdownThread.register(this);
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114 }
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115 }
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116 else
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117 ShutdownThread.deregister(this);
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118
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119 _stopAtShutdown=stop;
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120 }
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121
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122 /**
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123 * @return true if {@link #dumpStdErr()} is called after starting
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124 */
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125 public boolean isDumpAfterStart()
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126 {
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127 return _dumpAfterStart;
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128 }
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129
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130 /**
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131 * @param dumpAfterStart true if {@link #dumpStdErr()} is called after starting
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132 */
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133 public void setDumpAfterStart(boolean dumpAfterStart)
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134 {
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135 _dumpAfterStart = dumpAfterStart;
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136 }
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137
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138 /**
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139 * @return true if {@link #dumpStdErr()} is called before stopping
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140 */
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141 public boolean isDumpBeforeStop()
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142 {
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143 return _dumpBeforeStop;
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144 }
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145
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146 /**
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147 * @param dumpBeforeStop true if {@link #dumpStdErr()} is called before stopping
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148 */
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149 public void setDumpBeforeStop(boolean dumpBeforeStop)
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150 {
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151 _dumpBeforeStop = dumpBeforeStop;
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152 }
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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 @Override
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158 protected void doStart() throws Exception
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159 {
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160 if (getStopAtShutdown())
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161 {
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162 ShutdownThread.register(this);
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163 }
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164
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165 ShutdownMonitor.getInstance().start(); // initialize
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166
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167 LOG.info("jetty-"+__version);
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168 HttpGenerator.setServerVersion(__version);
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169
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170 MultiException mex=new MultiException();
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171
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172 try
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173 {
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174 super.doStart();
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175 }
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176 catch(Throwable e)
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177 {
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178 mex.add(e);
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179 }
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180
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181 if (mex.size()==0)
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182 {
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183 try{connector.start();}
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184 catch(Throwable e)
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185 {
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186 mex.add(e);
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187 }
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188 }
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189
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190 if (isDumpAfterStart())
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191 dumpStdErr();
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192
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193 mex.ifExceptionThrow();
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194 }
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195
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196 /* ------------------------------------------------------------ */
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197 @Override
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198 protected void doStop() throws Exception
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199 {
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200 if (isDumpBeforeStop())
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201 dumpStdErr();
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202
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203 MultiException mex=new MultiException();
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204
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205 if (_graceful>0)
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206 {
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207 LOG.info("Graceful shutdown {}",connector);
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208 try{connector.close();}catch(Throwable e){mex.add(e);}
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209
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210 Handler[] contexts = getChildHandlersByClass(Graceful.class);
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211 for (int c=0;c<contexts.length;c++)
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212 {
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213 Graceful context=(Graceful)contexts[c];
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214 LOG.info("Graceful shutdown {}",context);
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215 context.setShutdown(true);
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216 }
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217 Thread.sleep(_graceful);
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218 }
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219
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220 try{connector.stop();}catch(Throwable e){mex.add(e);}
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221
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222 threadPool.shutdownNow();
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223
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224 try {super.doStop(); } catch(Throwable e) { mex.add(e);}
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225
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226 mex.ifExceptionThrow();
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227
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228 if (getStopAtShutdown())
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229 ShutdownThread.deregister(this);
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230 }
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231
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232 /* ------------------------------------------------------------ */
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233 /* Handle a request from a connection.
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234 * Called to handle a request on the connection when either the header has been received,
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235 * or after the entire request has been received (for short requests of known length), or
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236 * on the dispatch of an async request.
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237 */
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238 public void handle(AbstractHttpConnection connection) throws IOException, ServletException
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239 {
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240 final String target=connection.getRequest().getPathInfo();
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241 final Request request=connection.getRequest();
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242 final Response response=connection.getResponse();
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243
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244 if (LOG.isDebugEnabled())
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245 {
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246 LOG.debug("REQUEST "+target+" on "+connection);
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247 handle(target, request, request, response);
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248 LOG.debug("RESPONSE "+target+" "+connection.getResponse().getStatus()+" handled="+request.isHandled());
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249 }
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250 else
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251 handle(target, request, request, response);
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252 }
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253
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254 /* ------------------------------------------------------------ */
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255 /* Handle a request from a connection.
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256 * Called to handle a request on the connection when either the header has been received,
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257 * or after the entire request has been received (for short requests of known length), or
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258 * on the dispatch of an async request.
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259 */
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260 public void handleAsync(AbstractHttpConnection connection) throws IOException, ServletException
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261 {
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262 final AsyncContinuation async = connection.getRequest().getAsyncContinuation();
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263 final AsyncContinuation.AsyncEventState state = async.getAsyncEventState();
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264
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265 final Request baseRequest=connection.getRequest();
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266 final String path=state.getPath();
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267
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268 if (path!=null)
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269 {
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270 // this is a dispatch with a path
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271 final String contextPath=state.getServletContext().getContextPath();
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272 HttpURI uri = new HttpURI(URIUtil.addPaths(contextPath,path));
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273 baseRequest.setUri(uri);
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274 baseRequest.setRequestURI(null);
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275 baseRequest.setPathInfo(baseRequest.getRequestURI());
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276 if (uri.getQuery()!=null)
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277 baseRequest.mergeQueryString(uri.getQuery()); //we have to assume dispatch path and query are UTF8
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278 }
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279
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280 final String target=baseRequest.getPathInfo();
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281 final HttpServletRequest request=(HttpServletRequest)async.getRequest();
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282 final HttpServletResponse response=(HttpServletResponse)async.getResponse();
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283
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284 if (LOG.isDebugEnabled())
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285 {
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286 LOG.debug("REQUEST "+target+" on "+connection);
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287 handle(target, baseRequest, request, response);
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288 LOG.debug("RESPONSE "+target+" "+connection.getResponse().getStatus());
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289 }
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290 else
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291 handle(target, baseRequest, request, response);
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292
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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 public void join() throws InterruptedException
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298 {
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299 threadPool.awaitTermination(Long.MAX_VALUE, TimeUnit.MILLISECONDS);
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300 }
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301
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302 /* ------------------------------------------------------------ */
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303 /*
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304 * @see org.eclipse.util.AttributesMap#clearAttributes()
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305 */
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306 public void clearAttributes()
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307 {
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308 _attributes.clearAttributes();
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309 }
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310
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311 /* ------------------------------------------------------------ */
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312 /*
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313 * @see org.eclipse.util.AttributesMap#getAttribute(java.lang.String)
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314 */
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315 public Object getAttribute(String name)
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316 {
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317 return _attributes.getAttribute(name);
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318 }
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319
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320 /* ------------------------------------------------------------ */
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321 /*
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322 * @see org.eclipse.util.AttributesMap#getAttributeNames()
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323 */
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324 public Enumeration getAttributeNames()
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325 {
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326 return AttributesMap.getAttributeNamesCopy(_attributes);
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327 }
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328
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329 /* ------------------------------------------------------------ */
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330 /*
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331 * @see org.eclipse.util.AttributesMap#removeAttribute(java.lang.String)
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332 */
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333 public void removeAttribute(String name)
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334 {
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335 _attributes.removeAttribute(name);
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336 }
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337
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338 /* ------------------------------------------------------------ */
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339 /*
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340 * @see org.eclipse.util.AttributesMap#setAttribute(java.lang.String, java.lang.Object)
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341 */
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342 public void setAttribute(String name, Object attribute)
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343 {
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344 _attributes.setAttribute(name, attribute);
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345 }
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346
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347 /* ------------------------------------------------------------ */
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348 /**
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349 * @return the graceful
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350 */
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351 public int getGracefulShutdown()
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352 {
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353 return _graceful;
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354 }
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355
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356 /* ------------------------------------------------------------ */
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357 /**
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358 * Set graceful shutdown timeout. If set, the internal <code>doStop()</code> method will not immediately stop the
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359 * server. Instead, all {@link Connector}s will be closed so that new connections will not be accepted
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360 * and all handlers that implement {@link Graceful} will be put into the shutdown mode so that no new requests
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361 * will be accepted, but existing requests can complete. The server will then wait the configured timeout
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362 * before stopping.
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363 * @param timeoutMS the milliseconds to wait for existing request to complete before stopping the server.
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364 *
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365 */
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366 public void setGracefulShutdown(int timeoutMS)
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367 {
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368 _graceful=timeoutMS;
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369 }
802
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370
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371 /* ------------------------------------------------------------ */
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372 @Override
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373 public String toString()
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374 {
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375 return this.getClass().getName()+"@"+Integer.toHexString(hashCode());
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376 }
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377
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378 /* ------------------------------------------------------------ */
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379 @Override
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380 public void dump(Appendable out,String indent) throws IOException
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381 {
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382 dumpThis(out);
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383 dump(out,indent,TypeUtil.asList(getHandlers()),getBeans(),Collections.singletonList(connector));
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384 }
802
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385
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386
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387 /* ------------------------------------------------------------ */
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388 public boolean isUncheckedPrintWriter()
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389 {
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390 return _uncheckedPrintWriter;
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391 }
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392
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393 /* ------------------------------------------------------------ */
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394 public void setUncheckedPrintWriter(boolean unchecked)
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395 {
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396 _uncheckedPrintWriter=unchecked;
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397 }
802
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398
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399
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400 /* ------------------------------------------------------------ */
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401 /* A handler that can be gracefully shutdown.
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402 * Called by doStop if a {@link #setGracefulShutdown} period is set.
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403 * TODO move this somewhere better
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404 */
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405 public interface Graceful extends Handler
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406 {
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407 public void setShutdown(boolean shutdown);
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408 }
802
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409
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410
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411 public final boolean isLowOnThreads()
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412 {
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413 // getActiveCount() locks the thread pool, so execute it last
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414 return threadPool.getPoolSize() == threadPool.getMaximumPoolSize() &&
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415 threadPool.getQueue().size() >= threadPool.getPoolSize() - threadPool.getActiveCount();
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416 }
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417
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418
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419 /* ------------------------------------------------------------ */
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420 public static void main(String...args) throws Exception
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421 {
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422 System.err.println(getVersion());
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423 }
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424 }