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annotate src/org/eclipse/jetty/server/Server.java @ 913:17f4fe8271de

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simplify connectors
author Franklin Schmidt <fschmidt@gmail.com>
date Sat, 08 Oct 2016 23:57:11 -0600
parents 1d0c304e12b5
children 3191abe890ef
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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.List;
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26 import java.util.ArrayList;
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27 import java.util.concurrent.LinkedBlockingQueue;
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28 import java.util.concurrent.ThreadPoolExecutor;
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29 import java.util.concurrent.TimeUnit;
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30
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31 import javax.servlet.ServletException;
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32 import javax.servlet.http.HttpServletRequest;
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33 import javax.servlet.http.HttpServletResponse;
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34
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35 import org.eclipse.jetty.http.HttpURI;
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36 import org.eclipse.jetty.server.handler.HandlerWrapper;
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37 import org.eclipse.jetty.server.nio.SelectChannelConnector;
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38 import org.eclipse.jetty.util.Attributes;
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39 import org.eclipse.jetty.util.AttributesMap;
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40 import org.eclipse.jetty.util.LazyList;
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41 import org.eclipse.jetty.util.MultiException;
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42 import org.eclipse.jetty.util.TypeUtil;
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43 import org.eclipse.jetty.util.URIUtil;
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44 import org.eclipse.jetty.util.component.Destroyable;
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45 import org.eclipse.jetty.util.component.LifeCycle;
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46 import org.slf4j.Logger;
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47 import org.slf4j.LoggerFactory;
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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 public 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 = new ThreadPoolExecutor(256, 256, 60, TimeUnit.SECONDS, new LinkedBlockingQueue<Runnable>());
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66 final List<Connector> connectors = new ArrayList<Connector>();
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67
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68
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69 public Server() {
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70 setServer(this);
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71 }
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72
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73 public Server(int port)
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74 {
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75 setServer(this);
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76 new SelectChannelConnector(this,port);
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77 }
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78
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79 @Override
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80 protected void doStart() throws Exception
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81 {
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82 LOG.info("jetty-"+version);
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83
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84 MultiException mex=new MultiException();
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85
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86 try
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87 {
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88 super.doStart();
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89 }
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90 catch(Throwable e)
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91 {
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92 mex.add(e);
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93 }
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94
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95 if (mex.size()==0) {
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96 for( Connector connector : connectors ) {
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97 try{connector.start();}
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98 catch(Throwable e)
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99 {
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100 mex.add(e);
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101 }
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102 }
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103 }
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104 mex.ifExceptionThrow();
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105 }
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106
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107 @Override
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108 protected void doStop() throws Exception
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109 {
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110 MultiException mex=new MultiException();
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111 /*
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112 if (_graceful>0)
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113 {
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114 LOG.info("Graceful shutdown {}",connector);
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115 try{connector.close();}catch(Throwable e){mex.add(e);}
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116
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117 Handler[] contexts = getChildHandlersByClass(Graceful.class);
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118 for (int c=0;c<contexts.length;c++)
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119 {
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120 Graceful context=(Graceful)contexts[c];
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121 LOG.info("Graceful shutdown {}",context);
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122 context.setShutdown(true);
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123 }
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124 Thread.sleep(_graceful);
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125 }
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126 */
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127 for( Connector connector : connectors ) {
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128 try{connector.stop();}catch(Throwable e){mex.add(e);}
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129 }
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130
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131 threadPool.shutdownNow();
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132
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133 try {super.doStop(); } catch(Throwable e) { mex.add(e);}
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134
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135 mex.ifExceptionThrow();
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136 }
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137
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138 /* ------------------------------------------------------------ */
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139 /* Handle a request from a connection.
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140 * Called to handle a request on the connection when either the header has been received,
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141 * or after the entire request has been received (for short requests of known length), or
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142 * on the dispatch of an async request.
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143 */
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144 public void handle(AbstractHttpConnection connection) throws IOException, ServletException
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145 {
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146 final String target=connection.getRequest().getPathInfo();
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147 final Request request=connection.getRequest();
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148 final Response response=connection.getResponse();
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149
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150 if (LOG.isDebugEnabled())
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151 {
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152 LOG.debug("REQUEST "+target+" on "+connection);
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153 handle(target, request, request, response);
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154 LOG.debug("RESPONSE "+target+" "+connection.getResponse().getStatus()+" handled="+request.isHandled());
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155 }
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156 else
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157 handle(target, request, request, response);
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158 }
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159
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160 /* ------------------------------------------------------------ */
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161 /* Handle a request from a connection.
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162 * Called to handle a request on the connection when either the header has been received,
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163 * or after the entire request has been received (for short requests of known length), or
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164 * on the dispatch of an async request.
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165 */
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166 public void handleAsync(AbstractHttpConnection connection) throws IOException, ServletException
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167 {
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168 final AsyncContinuation async = connection.getRequest().getAsyncContinuation();
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169 final AsyncContinuation.AsyncEventState state = async.getAsyncEventState();
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170
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171 final Request baseRequest=connection.getRequest();
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172 final String path=state.getPath();
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173
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174 if (path!=null)
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175 {
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176 // this is a dispatch with a path
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177 final String contextPath=state.getServletContext().getContextPath();
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178 HttpURI uri = new HttpURI(URIUtil.addPaths(contextPath,path));
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179 baseRequest.setUri(uri);
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180 baseRequest.setRequestURI(null);
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181 baseRequest.setPathInfo(baseRequest.getRequestURI());
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182 if (uri.getQuery()!=null)
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183 baseRequest.mergeQueryString(uri.getQuery()); //we have to assume dispatch path and query are UTF8
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184 }
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185
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186 final String target=baseRequest.getPathInfo();
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187 final HttpServletRequest request=(HttpServletRequest)async.getRequest();
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188 final HttpServletResponse response=(HttpServletResponse)async.getResponse();
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189
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190 if (LOG.isDebugEnabled())
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191 {
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192 LOG.debug("REQUEST "+target+" on "+connection);
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193 handle(target, baseRequest, request, response);
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194 LOG.debug("RESPONSE "+target+" "+connection.getResponse().getStatus());
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195 }
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196 else
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197 handle(target, baseRequest, request, response);
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198
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199 }
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200
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201
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202 public void join() throws InterruptedException
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203 {
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204 threadPool.awaitTermination(Long.MAX_VALUE, TimeUnit.MILLISECONDS);
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205 }
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206
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207 /* ------------------------------------------------------------ */
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208 /*
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209 * @see org.eclipse.util.AttributesMap#clearAttributes()
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210 */
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211 public void clearAttributes()
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212 {
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213 _attributes.clearAttributes();
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214 }
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215
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216 /* ------------------------------------------------------------ */
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217 /*
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218 * @see org.eclipse.util.AttributesMap#getAttribute(java.lang.String)
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219 */
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220 public Object getAttribute(String name)
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221 {
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222 return _attributes.getAttribute(name);
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223 }
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224
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225 /* ------------------------------------------------------------ */
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226 /*
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227 * @see org.eclipse.util.AttributesMap#getAttributeNames()
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228 */
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229 public Enumeration getAttributeNames()
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230 {
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231 return AttributesMap.getAttributeNamesCopy(_attributes);
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232 }
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233
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234 /* ------------------------------------------------------------ */
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235 /*
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236 * @see org.eclipse.util.AttributesMap#removeAttribute(java.lang.String)
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237 */
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238 public void removeAttribute(String name)
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239 {
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240 _attributes.removeAttribute(name);
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241 }
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242
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243 /* ------------------------------------------------------------ */
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244 /*
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245 * @see org.eclipse.util.AttributesMap#setAttribute(java.lang.String, java.lang.Object)
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246 */
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247 public void setAttribute(String name, Object attribute)
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248 {
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249 _attributes.setAttribute(name, attribute);
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250 }
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251
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252 /* ------------------------------------------------------------ */
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253 @Override
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254 public String toString()
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255 {
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256 return this.getClass().getName()+"@"+Integer.toHexString(hashCode());
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257 }
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258
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259 @Override
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260 public void dump(Appendable out,String indent) throws IOException
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261 {
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262 dumpThis(out);
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263 dump(out,indent,TypeUtil.asList(getHandlers()),getBeans(),connectors);
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264 }
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265
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266
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267 /* ------------------------------------------------------------ */
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268 /* A handler that can be gracefully shutdown.
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269 * Called by doStop if a {@link #setGracefulShutdown} period is set.
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270 * TODO move this somewhere better
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271 */
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272 public interface Graceful extends Handler
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273 {
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274 public void setShutdown(boolean shutdown);
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275 }
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276
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277
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278 public final boolean isLowOnThreads()
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279 {
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280 // getActiveCount() locks the thread pool, so execute it last
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281 return threadPool.getPoolSize() == threadPool.getMaximumPoolSize() &&
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282 threadPool.getQueue().size() >= threadPool.getPoolSize() - threadPool.getActiveCount();
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283 }
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284
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285
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286 public static void main(String...args) throws Exception
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287 {
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288 System.err.println(version);
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289 }
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290 }