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annotate src/org/eclipse/jetty/server/Server.java @ 880:00b3bd6e0ada

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remove Server._graceful
author Franklin Schmidt <fschmidt@gmail.com>
date Tue, 04 Oct 2016 15:59:35 -0600
parents a3775d0c6985
children d850a5e6ff15
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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
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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 boolean _dumpAfterStart=false;
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67 private boolean _dumpBeforeStop=false;
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68 private boolean _uncheckedPrintWriter=false;
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70
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71 /* ------------------------------------------------------------ */
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72 /** Convenience constructor
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73 * Creates server and a {@link SelectChannelConnector} at the passed port.
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74 */
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75 public Server(int port)
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76 {
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77 setServer(this);
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78
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79 connector = new SelectChannelConnector();
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80 connector.setPort(port);
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81 connector.setServer(this);
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82
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83 threadPool = new ThreadPoolExecutor(256, 256, 60, TimeUnit.SECONDS, new LinkedBlockingQueue<Runnable>());
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84 }
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85
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86
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87 /* ------------------------------------------------------------ */
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88 public static String getVersion()
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89 {
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90 return __version;
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91 }
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92
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93 /**
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94 * @return true if {@link #dumpStdErr()} is called after starting
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95 */
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96 public boolean isDumpAfterStart()
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97 {
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98 return _dumpAfterStart;
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99 }
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100
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101 /**
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102 * @param dumpAfterStart true if {@link #dumpStdErr()} is called after starting
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103 */
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104 public void setDumpAfterStart(boolean dumpAfterStart)
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105 {
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106 _dumpAfterStart = dumpAfterStart;
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107 }
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108
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109 /**
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110 * @return true if {@link #dumpStdErr()} is called before stopping
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111 */
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112 public boolean isDumpBeforeStop()
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113 {
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114 return _dumpBeforeStop;
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115 }
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116
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117 /**
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118 * @param dumpBeforeStop true if {@link #dumpStdErr()} is called before stopping
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119 */
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120 public void setDumpBeforeStop(boolean dumpBeforeStop)
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121 {
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122 _dumpBeforeStop = dumpBeforeStop;
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123 }
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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 @Override
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129 protected void doStart() throws Exception
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130 {
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131 LOG.info("jetty-"+__version);
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132 HttpGenerator.setServerVersion(__version);
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133
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134 MultiException mex=new MultiException();
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135
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136 try
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137 {
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138 super.doStart();
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139 }
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140 catch(Throwable e)
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141 {
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142 mex.add(e);
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143 }
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144
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145 if (mex.size()==0)
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146 {
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147 try{connector.start();}
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148 catch(Throwable e)
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149 {
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150 mex.add(e);
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151 }
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152 }
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153
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154 if (isDumpAfterStart())
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155 dumpStdErr();
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156
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157 mex.ifExceptionThrow();
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158 }
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159
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160 /* ------------------------------------------------------------ */
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161 @Override
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162 protected void doStop() throws Exception
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163 {
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164 if (isDumpBeforeStop())
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165 dumpStdErr();
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166
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167 MultiException mex=new MultiException();
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168 /*
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169 if (_graceful>0)
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170 {
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171 LOG.info("Graceful shutdown {}",connector);
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172 try{connector.close();}catch(Throwable e){mex.add(e);}
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173
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174 Handler[] contexts = getChildHandlersByClass(Graceful.class);
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175 for (int c=0;c<contexts.length;c++)
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176 {
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177 Graceful context=(Graceful)contexts[c];
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178 LOG.info("Graceful shutdown {}",context);
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179 context.setShutdown(true);
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180 }
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181 Thread.sleep(_graceful);
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182 }
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183 */
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184 try{connector.stop();}catch(Throwable e){mex.add(e);}
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185
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186 threadPool.shutdownNow();
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187
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188 try {super.doStop(); } catch(Throwable e) { mex.add(e);}
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189
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190 mex.ifExceptionThrow();
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191 }
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192
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193 /* ------------------------------------------------------------ */
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194 /* Handle a request from a connection.
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195 * Called to handle a request on the connection when either the header has been received,
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196 * or after the entire request has been received (for short requests of known length), or
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197 * on the dispatch of an async request.
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198 */
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199 public void handle(AbstractHttpConnection connection) throws IOException, ServletException
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200 {
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201 final String target=connection.getRequest().getPathInfo();
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202 final Request request=connection.getRequest();
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203 final Response response=connection.getResponse();
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204
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205 if (LOG.isDebugEnabled())
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206 {
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207 LOG.debug("REQUEST "+target+" on "+connection);
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208 handle(target, request, request, response);
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209 LOG.debug("RESPONSE "+target+" "+connection.getResponse().getStatus()+" handled="+request.isHandled());
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210 }
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211 else
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212 handle(target, request, request, response);
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213 }
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214
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215 /* ------------------------------------------------------------ */
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216 /* Handle a request from a connection.
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217 * Called to handle a request on the connection when either the header has been received,
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218 * or after the entire request has been received (for short requests of known length), or
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219 * on the dispatch of an async request.
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220 */
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221 public void handleAsync(AbstractHttpConnection connection) throws IOException, ServletException
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222 {
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223 final AsyncContinuation async = connection.getRequest().getAsyncContinuation();
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224 final AsyncContinuation.AsyncEventState state = async.getAsyncEventState();
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225
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226 final Request baseRequest=connection.getRequest();
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227 final String path=state.getPath();
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228
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229 if (path!=null)
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230 {
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231 // this is a dispatch with a path
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232 final String contextPath=state.getServletContext().getContextPath();
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233 HttpURI uri = new HttpURI(URIUtil.addPaths(contextPath,path));
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234 baseRequest.setUri(uri);
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235 baseRequest.setRequestURI(null);
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236 baseRequest.setPathInfo(baseRequest.getRequestURI());
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237 if (uri.getQuery()!=null)
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238 baseRequest.mergeQueryString(uri.getQuery()); //we have to assume dispatch path and query are UTF8
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239 }
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240
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241 final String target=baseRequest.getPathInfo();
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242 final HttpServletRequest request=(HttpServletRequest)async.getRequest();
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243 final HttpServletResponse response=(HttpServletResponse)async.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, baseRequest, request, response);
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249 LOG.debug("RESPONSE "+target+" "+connection.getResponse().getStatus());
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250 }
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251 else
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252 handle(target, baseRequest, request, response);
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253
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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 public void join() throws InterruptedException
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259 {
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260 threadPool.awaitTermination(Long.MAX_VALUE, TimeUnit.MILLISECONDS);
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261 }
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262
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263 /* ------------------------------------------------------------ */
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264 /*
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265 * @see org.eclipse.util.AttributesMap#clearAttributes()
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266 */
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267 public void clearAttributes()
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268 {
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269 _attributes.clearAttributes();
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270 }
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271
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272 /* ------------------------------------------------------------ */
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273 /*
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274 * @see org.eclipse.util.AttributesMap#getAttribute(java.lang.String)
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275 */
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276 public Object getAttribute(String name)
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277 {
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278 return _attributes.getAttribute(name);
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279 }
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280
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281 /* ------------------------------------------------------------ */
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282 /*
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283 * @see org.eclipse.util.AttributesMap#getAttributeNames()
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284 */
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285 public Enumeration getAttributeNames()
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286 {
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287 return AttributesMap.getAttributeNamesCopy(_attributes);
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288 }
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289
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290 /* ------------------------------------------------------------ */
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291 /*
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292 * @see org.eclipse.util.AttributesMap#removeAttribute(java.lang.String)
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293 */
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294 public void removeAttribute(String name)
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295 {
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296 _attributes.removeAttribute(name);
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297 }
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298
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299 /* ------------------------------------------------------------ */
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300 /*
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301 * @see org.eclipse.util.AttributesMap#setAttribute(java.lang.String, java.lang.Object)
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302 */
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303 public void setAttribute(String name, Object attribute)
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304 {
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305 _attributes.setAttribute(name, attribute);
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306 }
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307
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308 /* ------------------------------------------------------------ */
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309 @Override
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310 public String toString()
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311 {
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312 return this.getClass().getName()+"@"+Integer.toHexString(hashCode());
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313 }
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314
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315 /* ------------------------------------------------------------ */
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316 @Override
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317 public void dump(Appendable out,String indent) throws IOException
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318 {
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319 dumpThis(out);
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320 dump(out,indent,TypeUtil.asList(getHandlers()),getBeans(),Collections.singletonList(connector));
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321 }
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322
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323
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324 /* ------------------------------------------------------------ */
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325 public boolean isUncheckedPrintWriter()
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326 {
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327 return _uncheckedPrintWriter;
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328 }
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329
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330 /* ------------------------------------------------------------ */
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331 public void setUncheckedPrintWriter(boolean unchecked)
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332 {
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333 _uncheckedPrintWriter=unchecked;
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334 }
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335
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336
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337 /* ------------------------------------------------------------ */
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338 /* A handler that can be gracefully shutdown.
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339 * Called by doStop if a {@link #setGracefulShutdown} period is set.
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340 * TODO move this somewhere better
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341 */
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342 public interface Graceful extends Handler
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343 {
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344 public void setShutdown(boolean shutdown);
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345 }
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346
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347
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348 public final boolean isLowOnThreads()
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349 {
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350 // getActiveCount() locks the thread pool, so execute it last
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351 return threadPool.getPoolSize() == threadPool.getMaximumPoolSize() &&
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352 threadPool.getQueue().size() >= threadPool.getPoolSize() - threadPool.getActiveCount();
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353 }
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354
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355
812
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356 /* ------------------------------------------------------------ */
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357 public static void main(String...args) throws Exception
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358 {
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359 System.err.println(getVersion());
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360 }
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361 }