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annotate src/org/eclipse/jetty/server/Server.java @ 982:dbecd7faa1f5

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author Franklin Schmidt <fschmidt@gmail.com>
date Sun, 16 Oct 2016 21:40:27 -0600
parents 53b3f7d9714c
children af8742d31bca
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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.BlockingChannelConnector;
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38 import org.eclipse.jetty.server.nio.SelectChannelConnector;
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39 import org.eclipse.jetty.util.Attributes;
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40 import org.eclipse.jetty.util.AttributesMap;
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41 import org.eclipse.jetty.util.LazyList;
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42 import org.eclipse.jetty.util.MultiException;
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43 import org.eclipse.jetty.util.TypeUtil;
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44 import org.eclipse.jetty.util.URIUtil;
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45 import org.eclipse.jetty.util.component.Destroyable;
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46 import org.eclipse.jetty.util.component.LifeCycle;
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47 import org.slf4j.Logger;
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48 import org.slf4j.LoggerFactory;
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49
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50 /* ------------------------------------------------------------ */
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51 /** Jetty HTTP Servlet Server.
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52 * This class is the main class for the Jetty HTTP Servlet server.
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53 * It aggregates Connectors (HTTP request receivers) and request Handlers.
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54 * The server is itself a handler and a ThreadPool. Connectors use the ThreadPool methods
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55 * to run jobs that will eventually call the handle method.
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56 *
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57 * @org.apache.xbean.XBean description="Creates an embedded Jetty web server"
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58 */
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59 public class Server extends HandlerWrapper implements Attributes
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60 {
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61 private static final Logger LOG = LoggerFactory.getLogger(Server.class);
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62
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63 public static final String version = "8";
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64
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65 private final AttributesMap _attributes = new AttributesMap();
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66 public final ThreadPoolExecutor threadPool = new ThreadPoolExecutor(256, 256, 60, TimeUnit.SECONDS, new LinkedBlockingQueue<Runnable>());
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67 final List<Connector> connectors = new ArrayList<Connector>();
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68
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69
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70 public Server() {
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71 setServer(this);
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72 }
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73
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74 public Server(int port)
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75 {
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76 setServer(this);
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77 // new SelectChannelConnector(this,port);
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78 new BlockingChannelConnector(this,port);
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79 }
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80
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81 @Override
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82 protected void doStart() throws Exception
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83 {
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84 LOG.info("jetty-"+version);
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85
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86 MultiException mex=new MultiException();
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87
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88 try
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89 {
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90 super.doStart();
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91 }
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92 catch(Throwable e)
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93 {
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94 mex.add(e);
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95 }
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96
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97 if (mex.size()==0) {
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98 for( Connector connector : connectors ) {
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99 try{connector.start();}
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100 catch(Throwable e)
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101 {
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102 mex.add(e);
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103 }
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104 }
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105 }
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106 mex.ifExceptionThrow();
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107 }
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108
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109 @Override
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110 protected void doStop() throws Exception
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111 {
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112 MultiException mex=new MultiException();
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113 /*
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114 if (_graceful>0)
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115 {
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116 LOG.info("Graceful shutdown {}",connector);
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117 try{connector.close();}catch(Throwable e){mex.add(e);}
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118
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119 Handler[] contexts = getChildHandlersByClass(Graceful.class);
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120 for (int c=0;c<contexts.length;c++)
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121 {
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122 Graceful context=(Graceful)contexts[c];
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123 LOG.info("Graceful shutdown {}",context);
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124 context.setShutdown(true);
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125 }
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126 Thread.sleep(_graceful);
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127 }
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128 */
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129 for( Connector connector : connectors ) {
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130 try{connector.stop();}catch(Throwable e){mex.add(e);}
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131 }
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132
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133 threadPool.shutdownNow();
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134
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135 try {super.doStop(); } catch(Throwable e) { mex.add(e);}
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136
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137 mex.ifExceptionThrow();
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138 }
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139
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140 /* ------------------------------------------------------------ */
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141 /* Handle a request from a connection.
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142 * Called to handle a request on the connection when either the header has been received,
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143 * or after the entire request has been received (for short requests of known length), or
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144 * on the dispatch of an async request.
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145 */
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146 public void handle(AbstractHttpConnection connection) throws IOException, ServletException
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147 {
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148 final String target=connection.getRequest().getPathInfo();
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149 final Request request=connection.getRequest();
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150 final Response response=connection.getResponse();
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151
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152 if (LOG.isDebugEnabled())
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153 {
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154 LOG.debug("REQUEST "+target+" on "+connection);
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155 handle(target, request, request, response);
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156 LOG.debug("RESPONSE "+target+" "+connection.getResponse().getStatus()+" handled="+request.isHandled());
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157 }
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158 else
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159 handle(target, request, request, response);
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160 }
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161
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162 public void join() throws InterruptedException
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163 {
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164 threadPool.awaitTermination(Long.MAX_VALUE, TimeUnit.MILLISECONDS);
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165 }
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166
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167 /* ------------------------------------------------------------ */
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168 /*
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169 * @see org.eclipse.util.AttributesMap#clearAttributes()
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170 */
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171 public void clearAttributes()
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172 {
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173 _attributes.clearAttributes();
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174 }
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175
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176 /* ------------------------------------------------------------ */
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177 /*
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178 * @see org.eclipse.util.AttributesMap#getAttribute(java.lang.String)
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179 */
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180 public Object getAttribute(String name)
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181 {
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182 return _attributes.getAttribute(name);
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183 }
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184
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185 /* ------------------------------------------------------------ */
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186 /*
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187 * @see org.eclipse.util.AttributesMap#getAttributeNames()
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188 */
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189 public Enumeration getAttributeNames()
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190 {
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191 return AttributesMap.getAttributeNamesCopy(_attributes);
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192 }
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193
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194 /* ------------------------------------------------------------ */
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195 /*
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196 * @see org.eclipse.util.AttributesMap#removeAttribute(java.lang.String)
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197 */
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198 public void removeAttribute(String name)
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199 {
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200 _attributes.removeAttribute(name);
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201 }
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202
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203 /* ------------------------------------------------------------ */
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204 /*
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205 * @see org.eclipse.util.AttributesMap#setAttribute(java.lang.String, java.lang.Object)
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206 */
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207 public void setAttribute(String name, Object attribute)
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208 {
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209 _attributes.setAttribute(name, attribute);
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210 }
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211
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212 /* ------------------------------------------------------------ */
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213 @Override
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214 public String toString()
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215 {
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216 return this.getClass().getName()+"@"+Integer.toHexString(hashCode());
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217 }
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218
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219 @Override
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220 public void dump(Appendable out,String indent) throws IOException
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221 {
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222 dumpThis(out);
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223 dump(out,indent,TypeUtil.asList(getHandlers()),getBeans(),connectors);
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224 }
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225
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226
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227 /* ------------------------------------------------------------ */
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228 /* A handler that can be gracefully shutdown.
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229 * Called by doStop if a {@link #setGracefulShutdown} period is set.
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230 * TODO move this somewhere better
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231 */
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232 public interface Graceful extends Handler
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233 {
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234 public void setShutdown(boolean shutdown);
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235 }
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236
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237
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238 public final boolean isLowOnThreads()
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239 {
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240 // getActiveCount() locks the thread pool, so execute it last
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241 return threadPool.getPoolSize() == threadPool.getMaximumPoolSize() &&
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242 threadPool.getQueue().size() >= threadPool.getPoolSize() - threadPool.getActiveCount();
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243 }
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244
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245
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246 public static void main(String...args) throws Exception
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247 {
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248 System.err.println(version);
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249 }
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250 }