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annotate src/org/eclipse/jetty/server/Server.java @ 989:900e5b8ccd19

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remove useless listeners
author Franklin Schmidt <fschmidt@gmail.com>
date Mon, 17 Oct 2016 05:39:54 -0600
parents af8742d31bca
children 688c39c50ee3
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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.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 final class Server extends HandlerWrapper
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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 public static final String version = "8";
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62
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63 public final ThreadPoolExecutor threadPool = new ThreadPoolExecutor(256, 256, 60, TimeUnit.SECONDS, new LinkedBlockingQueue<Runnable>());
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64 final List<Connector> connectors = new ArrayList<Connector>();
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65
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66
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67 public Server() {
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68 setServer(this);
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69 }
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70
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71 public Server(int port)
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72 {
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73 setServer(this);
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74 // new SelectChannelConnector(this,port);
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75 new BlockingChannelConnector(this,port);
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76 }
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77
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78 @Override
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79 protected void doStart() throws Exception
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80 {
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81 LOG.info("jetty-"+version);
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82
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83 MultiException mex=new MultiException();
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84
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85 try
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86 {
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87 super.doStart();
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88 }
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89 catch(Throwable e)
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90 {
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91 mex.add(e);
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92 }
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93
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94 if (mex.size()==0) {
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95 for( Connector connector : connectors ) {
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96 try{connector.start();}
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97 catch(Throwable e)
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98 {
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99 mex.add(e);
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100 }
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101 }
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102 }
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103 mex.ifExceptionThrow();
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104 }
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105
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106 @Override
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107 protected void doStop() throws Exception
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108 {
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109 MultiException mex=new MultiException();
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110 /*
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111 if (_graceful>0)
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112 {
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113 LOG.info("Graceful shutdown {}",connector);
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114 try{connector.close();}catch(Throwable e){mex.add(e);}
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115
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116 Handler[] contexts = getChildHandlersByClass(Graceful.class);
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117 for (int c=0;c<contexts.length;c++)
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118 {
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119 Graceful context=(Graceful)contexts[c];
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120 LOG.info("Graceful shutdown {}",context);
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121 context.setShutdown(true);
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122 }
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123 Thread.sleep(_graceful);
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124 }
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125 */
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126 for( Connector connector : connectors ) {
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127 try{connector.stop();}catch(Throwable e){mex.add(e);}
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128 }
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129
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130 threadPool.shutdownNow();
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131
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132 try {super.doStop(); } catch(Throwable e) { mex.add(e);}
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133
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134 mex.ifExceptionThrow();
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135 }
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136
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137 /* ------------------------------------------------------------ */
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138 /* Handle a request from a connection.
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139 * Called to handle a request on the connection when either the header has been received,
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140 * or after the entire request has been received (for short requests of known length), or
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141 * on the dispatch of an async request.
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142 */
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143 public void handle(AbstractHttpConnection connection) throws IOException, ServletException
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144 {
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145 final String target=connection.getRequest().getPathInfo();
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146 final Request request=connection.getRequest();
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147 final Response response=connection.getResponse();
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148
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149 if (LOG.isDebugEnabled())
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150 {
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151 LOG.debug("REQUEST "+target+" on "+connection);
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152 handle(target, request, request, response);
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153 LOG.debug("RESPONSE "+target+" "+connection.getResponse().getStatus()+" handled="+request.isHandled());
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154 }
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155 else
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156 handle(target, request, request, response);
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157 }
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158
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159 public void join() throws InterruptedException
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160 {
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161 threadPool.awaitTermination(Long.MAX_VALUE, TimeUnit.MILLISECONDS);
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162 }
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163
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164 @Override
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165 public String toString()
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166 {
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167 return this.getClass().getName()+"@"+Integer.toHexString(hashCode());
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168 }
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169
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170 @Override
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171 public void dump(Appendable out,String indent) throws IOException
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172 {
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173 dumpThis(out);
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174 dump(out,indent,TypeUtil.asList(getHandlers()),getBeans(),connectors);
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175 }
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176
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177
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178 /* ------------------------------------------------------------ */
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179 /* A handler that can be gracefully shutdown.
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180 * Called by doStop if a {@link #setGracefulShutdown} period is set.
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181 * TODO move this somewhere better
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182 */
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183 public interface Graceful extends Handler
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184 {
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185 public void setShutdown(boolean shutdown);
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186 }
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187
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188
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189 public final boolean isLowOnThreads()
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190 {
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191 // getActiveCount() locks the thread pool, so execute it last
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192 return threadPool.getPoolSize() == threadPool.getMaximumPoolSize() &&
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193 threadPool.getQueue().size() >= threadPool.getPoolSize() - threadPool.getActiveCount();
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194 }
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195
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196
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197 public static void main(String...args) throws Exception
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198 {
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199 System.err.println(version);
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200 }
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201 }