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annotate src/org/eclipse/jetty/io/nio/SelectorManager.java @ 970:d82eb99e8df6

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remove ConnectorSelectorManager
author Franklin Schmidt <fschmidt@gmail.com>
date Fri, 14 Oct 2016 05:24:18 -0600
parents 0650077fcd6c
children f997df37cec1
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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.io.nio;
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20
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21 import java.io.IOException;
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22 import java.nio.channels.CancelledKeyException;
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23 import java.nio.channels.Channel;
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24 import java.nio.channels.ClosedSelectorException;
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25 import java.nio.channels.SelectableChannel;
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26 import java.nio.channels.SelectionKey;
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27 import java.nio.channels.ServerSocketChannel;
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28 import java.nio.channels.SocketChannel;
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29 import java.util.ArrayList;
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30 import java.util.List;
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31 import java.util.Collections;
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32 import java.util.Set;
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33 import java.util.concurrent.ConcurrentHashMap;
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34 import java.util.concurrent.ConcurrentLinkedQueue;
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35 import java.util.concurrent.ConcurrentMap;
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36 import java.util.concurrent.CountDownLatch;
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37 import java.util.concurrent.TimeUnit;
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38
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39 import org.eclipse.jetty.io.AsyncEndPoint;
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40 import org.eclipse.jetty.io.Connection;
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41 import org.eclipse.jetty.io.EndPoint;
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42 import org.eclipse.jetty.util.TypeUtil;
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43 import org.eclipse.jetty.util.component.AbstractLifeCycle;
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44 import org.eclipse.jetty.util.component.AggregateLifeCycle;
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45 import org.eclipse.jetty.util.component.Dumpable;
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46 import org.eclipse.jetty.server.nio.SelectChannelConnector;
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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 /* ------------------------------------------------------------ */
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52 /**
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53 * The Selector Manager manages and number of SelectSets to allow
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54 * NIO scheduling to scale to large numbers of connections.
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55 * <p>
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56 */
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57 public final class SelectorManager extends AbstractLifeCycle implements Dumpable
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58 {
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59 public static final Logger LOG = LoggerFactory.getLogger("org.eclipse.jetty.io.nio");
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60
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61 private final SelectChannelConnector scc;
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62 private volatile long _now = System.currentTimeMillis();
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63 private SaneSelector _selector;
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64
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65 /* ------------------------------------------------------------ */
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66 /**
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67 * @param maxIdleTime The maximum period in milli seconds that a connection may be idle before it is closed.
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68 * @see #setLowResourcesMaxIdleTime(long)
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69 */
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70 public SelectorManager(SelectChannelConnector scc)
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71 {
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72 this.scc = scc;
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73 }
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74
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75 /* ------------------------------------------------------------ */
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76 /** Register a channel
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77 * @param channel
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78 */
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79 public final void register(SocketChannel channel)
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80 {
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81 /*
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82 SelectSet set = _selectSet;
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83 if (set!=null)
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84 {
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85 set.addChange(channel);
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86 }
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87 */
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88 try {
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89 SelectionKey key = _selector.register(channel,0,null);
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90 SelectChannelEndPoint endpoint = new SelectChannelEndPoint(channel,this,key, scc.getMaxIdleTime());
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91 key.attach(endpoint);
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92 _selector.update();
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93 //System.out.println("qqqqqqqqqqqqqqqqqqqqqqqqqqqqq b");
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94 endpoint.schedule();
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95 } catch(IOException e) {
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96 LOG.warn("",e);
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97 try {
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98 channel.close();
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99 } catch(IOException e2) {
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100 LOG.warn("",e2);
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101 }
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102 }
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103 }
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104
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105
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106 public void execute(Runnable task) {
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107 scc.server.threadPool.execute(task);
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108 }
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109
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110
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111 @Override
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112 protected void doStart() throws Exception
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113 {
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114 _selector = new SaneSelector();
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115
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116 super.doStart();
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117
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118 // start a thread to Select
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119 execute(new Runnable()
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120 {
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121 public void run()
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122 {
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123 String name=Thread.currentThread().getName();
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124 try
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125 {
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126 if (_selector==null)
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127 return;
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128
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129 Thread.currentThread().setName(name+" Selector");
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130 LOG.debug("Starting {} on {}",Thread.currentThread(),this);
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131 while (isRunning())
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132 {
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133 try
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134 {
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135 doSelect();
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136 }
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137 catch(IOException e)
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138 {
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139 LOG.trace("",e);
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140 }
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141 catch(Exception e)
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142 {
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143 LOG.warn("",e);
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144 }
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145 }
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146 }
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147 finally
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148 {
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149 _selector = null;
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150 LOG.debug("Stopped {} on {}",Thread.currentThread(),this);
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151 Thread.currentThread().setName(name);
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152 }
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153 }
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154
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155 });
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156 }
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157
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158
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159 @Override
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160 protected synchronized void doStop() throws Exception
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161 {
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162 if (_selector!=null)
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163 {
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164 // close endpoints and selector
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165 for (SelectionKey key : _selector.keys())
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166 {
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167 EndPoint endpoint = (EndPoint)key.attachment();
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168 try
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169 {
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170 endpoint.close();
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171 }
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172 catch(IOException e)
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173 {
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174 LOG.trace("",e);
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175 }
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176 }
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177
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178 try
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179 {
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180 _selector.close();
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181 }
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182 catch (IOException e)
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183 {
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184 LOG.trace("",e);
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185 }
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186 }
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187 super.doStop();
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188 }
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189
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190 public AsyncConnection newConnection(SocketChannel channel, SelectChannelEndPoint endpoint) {
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191 return scc.newConnection(channel,endpoint);
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192 }
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193
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194 @Override
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195 public String dump()
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196 {
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197 return AggregateLifeCycle.dump(this);
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198 }
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199
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200 @Override
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201 public void dump(Appendable out, String indent) throws IOException
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202 {
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203 AggregateLifeCycle.dumpObject(out,this);
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204 // AggregateLifeCycle.dump(out,indent,Collections.emptyList());
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205 }
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206
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207
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208 // from SelectSet
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209
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210 private void doSelect() throws IOException
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211 {
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212 try
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213 {
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214 _selector.select();
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215
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216 // Look for things to do
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217 for (SelectionKey key: _selector.selectedKeys())
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218 {
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219 try
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220 {
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221 if (!key.isValid())
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222 {
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223 key.cancel();
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224 continue;
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225 }
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226
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227 if (key.isReadable()||key.isWritable()) {
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228 SelectChannelEndPoint endpoint = (SelectChannelEndPoint)key.attachment();
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229 endpoint.schedule();
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230 }
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231 }
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232 catch (CancelledKeyException e)
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233 {
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234 // LOG.trace("",e);
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235 LOG.warn("",e);
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236 }
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237 catch (Exception e)
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238 {
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239 LOG.warn("",e);
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240 }
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241 }
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242
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243 // Everything always handled
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244 _selector.selectedKeys().clear();
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245
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246 _now = System.currentTimeMillis();
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247 }
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248 catch (ClosedSelectorException e)
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249 {
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250 if (isRunning())
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251 LOG.warn("",e);
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252 else
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253 LOG.trace("",e);
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254 }
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255 catch (CancelledKeyException e)
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256 {
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257 LOG.trace("",e);
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258 }
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259 }
802
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260
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diff changeset
261 public final long getNow()
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262 {
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263 return _now;
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264 }
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265
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266 final SaneSelector getSelector()
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267 {
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268 return _selector;
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269 }
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270
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271 @Override
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272 public final String toString()
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273 {
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274 SaneSelector selector=_selector;
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275 return String.format("%s keys=%d selected=%d",
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276 super.toString(),
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277 selector != null && selector.isOpen() ? selector.keys().size() : -1,
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diff changeset
278 selector != null && selector.isOpen() ? selector.selectedKeys().size() : -1);
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279 }
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280
802
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281 }