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annotate src/org/eclipse/jetty/server/Server.java @ 879:a3775d0c6985

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remove ShutdownThread
author Franklin Schmidt <fschmidt@gmail.com>
date Tue, 04 Oct 2016 15:55:02 -0600
parents 5f8a242392da
children 00b3bd6e0ada
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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
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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 public final ThreadPoolExecutor threadPool;
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65 public final Connector connector;
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66 private int _graceful=0;
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67 private boolean _dumpAfterStart=false;
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68 private boolean _dumpBeforeStop=false;
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69 private boolean _uncheckedPrintWriter=false;
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71
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72 /* ------------------------------------------------------------ */
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73 /** Convenience constructor
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74 * Creates server and a {@link SelectChannelConnector} at the passed port.
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75 */
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76 public Server(int port)
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77 {
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78 setServer(this);
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79
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80 connector = new SelectChannelConnector();
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81 connector.setPort(port);
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82 connector.setServer(this);
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83
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84 threadPool = new ThreadPoolExecutor(256, 256, 60, TimeUnit.SECONDS, new LinkedBlockingQueue<Runnable>());
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85 }
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86
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87
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88 /* ------------------------------------------------------------ */
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89 public static String getVersion()
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90 {
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91 return __version;
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92 }
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93
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94 /**
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95 * @return true if {@link #dumpStdErr()} is called after starting
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96 */
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97 public boolean isDumpAfterStart()
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98 {
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99 return _dumpAfterStart;
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100 }
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101
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102 /**
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103 * @param dumpAfterStart true if {@link #dumpStdErr()} is called after starting
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104 */
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105 public void setDumpAfterStart(boolean dumpAfterStart)
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106 {
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107 _dumpAfterStart = dumpAfterStart;
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108 }
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109
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110 /**
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111 * @return true if {@link #dumpStdErr()} is called before stopping
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112 */
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113 public boolean isDumpBeforeStop()
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114 {
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115 return _dumpBeforeStop;
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116 }
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117
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118 /**
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119 * @param dumpBeforeStop true if {@link #dumpStdErr()} is called before stopping
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120 */
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121 public void setDumpBeforeStop(boolean dumpBeforeStop)
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122 {
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123 _dumpBeforeStop = dumpBeforeStop;
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124 }
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125
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126
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127
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128 /* ------------------------------------------------------------ */
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129 @Override
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130 protected void doStart() throws Exception
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131 {
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132 LOG.info("jetty-"+__version);
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133 HttpGenerator.setServerVersion(__version);
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134
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135 MultiException mex=new MultiException();
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136
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137 try
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138 {
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139 super.doStart();
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140 }
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141 catch(Throwable e)
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142 {
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143 mex.add(e);
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144 }
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145
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146 if (mex.size()==0)
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147 {
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148 try{connector.start();}
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149 catch(Throwable e)
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150 {
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151 mex.add(e);
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152 }
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153 }
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154
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155 if (isDumpAfterStart())
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156 dumpStdErr();
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157
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158 mex.ifExceptionThrow();
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159 }
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160
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161 /* ------------------------------------------------------------ */
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162 @Override
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163 protected void doStop() throws Exception
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164 {
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165 if (isDumpBeforeStop())
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166 dumpStdErr();
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167
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168 MultiException mex=new MultiException();
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169
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170 if (_graceful>0)
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171 {
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172 LOG.info("Graceful shutdown {}",connector);
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173 try{connector.close();}catch(Throwable e){mex.add(e);}
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174
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175 Handler[] contexts = getChildHandlersByClass(Graceful.class);
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176 for (int c=0;c<contexts.length;c++)
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177 {
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178 Graceful context=(Graceful)contexts[c];
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179 LOG.info("Graceful shutdown {}",context);
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180 context.setShutdown(true);
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181 }
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182 Thread.sleep(_graceful);
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183 }
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184
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185 try{connector.stop();}catch(Throwable e){mex.add(e);}
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186
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187 threadPool.shutdownNow();
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188
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189 try {super.doStop(); } catch(Throwable e) { mex.add(e);}
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190
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191 mex.ifExceptionThrow();
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192 }
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193
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194 /* ------------------------------------------------------------ */
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195 /* Handle a request from a connection.
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196 * Called to handle a request on the connection when either the header has been received,
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197 * or after the entire request has been received (for short requests of known length), or
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198 * on the dispatch of an async request.
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199 */
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200 public void handle(AbstractHttpConnection connection) throws IOException, ServletException
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201 {
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202 final String target=connection.getRequest().getPathInfo();
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203 final Request request=connection.getRequest();
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204 final Response response=connection.getResponse();
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205
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206 if (LOG.isDebugEnabled())
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207 {
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208 LOG.debug("REQUEST "+target+" on "+connection);
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209 handle(target, request, request, response);
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210 LOG.debug("RESPONSE "+target+" "+connection.getResponse().getStatus()+" handled="+request.isHandled());
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211 }
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212 else
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213 handle(target, request, request, response);
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214 }
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215
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216 /* ------------------------------------------------------------ */
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217 /* Handle a request from a connection.
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218 * Called to handle a request on the connection when either the header has been received,
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219 * or after the entire request has been received (for short requests of known length), or
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220 * on the dispatch of an async request.
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221 */
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222 public void handleAsync(AbstractHttpConnection connection) throws IOException, ServletException
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223 {
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224 final AsyncContinuation async = connection.getRequest().getAsyncContinuation();
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225 final AsyncContinuation.AsyncEventState state = async.getAsyncEventState();
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226
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227 final Request baseRequest=connection.getRequest();
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228 final String path=state.getPath();
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229
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230 if (path!=null)
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231 {
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232 // this is a dispatch with a path
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233 final String contextPath=state.getServletContext().getContextPath();
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234 HttpURI uri = new HttpURI(URIUtil.addPaths(contextPath,path));
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235 baseRequest.setUri(uri);
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236 baseRequest.setRequestURI(null);
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237 baseRequest.setPathInfo(baseRequest.getRequestURI());
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238 if (uri.getQuery()!=null)
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239 baseRequest.mergeQueryString(uri.getQuery()); //we have to assume dispatch path and query are UTF8
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240 }
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241
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242 final String target=baseRequest.getPathInfo();
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243 final HttpServletRequest request=(HttpServletRequest)async.getRequest();
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244 final HttpServletResponse response=(HttpServletResponse)async.getResponse();
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245
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246 if (LOG.isDebugEnabled())
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247 {
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248 LOG.debug("REQUEST "+target+" on "+connection);
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249 handle(target, baseRequest, request, response);
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250 LOG.debug("RESPONSE "+target+" "+connection.getResponse().getStatus());
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251 }
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252 else
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253 handle(target, baseRequest, request, response);
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254
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255 }
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256
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257
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258 /* ------------------------------------------------------------ */
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259 public void join() throws InterruptedException
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260 {
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261 threadPool.awaitTermination(Long.MAX_VALUE, TimeUnit.MILLISECONDS);
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262 }
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263
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264 /* ------------------------------------------------------------ */
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265 /*
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266 * @see org.eclipse.util.AttributesMap#clearAttributes()
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267 */
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268 public void clearAttributes()
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269 {
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270 _attributes.clearAttributes();
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271 }
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272
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273 /* ------------------------------------------------------------ */
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274 /*
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275 * @see org.eclipse.util.AttributesMap#getAttribute(java.lang.String)
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276 */
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277 public Object getAttribute(String name)
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278 {
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279 return _attributes.getAttribute(name);
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280 }
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281
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282 /* ------------------------------------------------------------ */
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283 /*
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284 * @see org.eclipse.util.AttributesMap#getAttributeNames()
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285 */
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286 public Enumeration getAttributeNames()
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287 {
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288 return AttributesMap.getAttributeNamesCopy(_attributes);
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289 }
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290
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291 /* ------------------------------------------------------------ */
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292 /*
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293 * @see org.eclipse.util.AttributesMap#removeAttribute(java.lang.String)
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294 */
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295 public void removeAttribute(String name)
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296 {
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297 _attributes.removeAttribute(name);
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298 }
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299
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300 /* ------------------------------------------------------------ */
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301 /*
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302 * @see org.eclipse.util.AttributesMap#setAttribute(java.lang.String, java.lang.Object)
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303 */
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304 public void setAttribute(String name, Object attribute)
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305 {
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306 _attributes.setAttribute(name, attribute);
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307 }
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308
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309 /* ------------------------------------------------------------ */
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310 /**
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311 * @return the graceful
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312 */
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313 public int getGracefulShutdown()
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314 {
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315 return _graceful;
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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 * Set graceful shutdown timeout. If set, the internal <code>doStop()</code> method will not immediately stop the
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321 * server. Instead, all {@link Connector}s will be closed so that new connections will not be accepted
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322 * and all handlers that implement {@link Graceful} will be put into the shutdown mode so that no new requests
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323 * will be accepted, but existing requests can complete. The server will then wait the configured timeout
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324 * before stopping.
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325 * @param timeoutMS the milliseconds to wait for existing request to complete before stopping the server.
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326 *
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327 */
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328 public void setGracefulShutdown(int timeoutMS)
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329 {
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330 _graceful=timeoutMS;
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331 }
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332
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333 /* ------------------------------------------------------------ */
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334 @Override
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335 public String toString()
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336 {
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337 return this.getClass().getName()+"@"+Integer.toHexString(hashCode());
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338 }
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339
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340 /* ------------------------------------------------------------ */
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341 @Override
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342 public void dump(Appendable out,String indent) throws IOException
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343 {
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344 dumpThis(out);
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345 dump(out,indent,TypeUtil.asList(getHandlers()),getBeans(),Collections.singletonList(connector));
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346 }
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347
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348
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349 /* ------------------------------------------------------------ */
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350 public boolean isUncheckedPrintWriter()
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351 {
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352 return _uncheckedPrintWriter;
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353 }
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354
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355 /* ------------------------------------------------------------ */
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356 public void setUncheckedPrintWriter(boolean unchecked)
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357 {
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358 _uncheckedPrintWriter=unchecked;
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359 }
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360
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361
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362 /* ------------------------------------------------------------ */
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363 /* A handler that can be gracefully shutdown.
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364 * Called by doStop if a {@link #setGracefulShutdown} period is set.
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365 * TODO move this somewhere better
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366 */
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367 public interface Graceful extends Handler
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368 {
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369 public void setShutdown(boolean shutdown);
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370 }
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371
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372
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373 public final boolean isLowOnThreads()
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374 {
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375 // getActiveCount() locks the thread pool, so execute it last
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376 return threadPool.getPoolSize() == threadPool.getMaximumPoolSize() &&
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377 threadPool.getQueue().size() >= threadPool.getPoolSize() - threadPool.getActiveCount();
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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 public static void main(String...args) throws Exception
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383 {
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384 System.err.println(getVersion());
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385 }
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386 }