Mercurial > hg > blitz_condensed
annotate src/com/go/trove/util/ThreadPool.java @ 0:3dc0c5604566
Initial checkin of blitz 2.0 fcs - no installer yet.
author | Dan Creswell <dan.creswell@gmail.com> |
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date | Sat, 21 Mar 2009 11:00:06 +0000 |
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1 /* ==================================================================== |
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2 * Trove - Copyright (c) 1997-2000 Walt Disney Internet Group |
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3 * ==================================================================== |
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4 * The Tea Software License, Version 1.1 |
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5 * |
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6 * Copyright (c) 2000 Walt Disney Internet Group. All rights reserved. |
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7 * |
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8 * Redistribution and use in source and binary forms, with or without |
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9 * modification, are permitted provided that the following conditions |
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10 * are met: |
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11 * |
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12 * 1. Redistributions of source code must retain the above copyright |
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13 * notice, this list of conditions and the following disclaimer. |
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14 * |
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15 * 2. Redistributions in binary form must reproduce the above copyright |
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16 * notice, this list of conditions and the following disclaimer in |
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17 * the documentation and/or other materials provided with the |
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18 * distribution. |
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19 * |
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20 * 3. The end-user documentation included with the redistribution, |
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21 * if any, must include the following acknowledgment: |
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22 * "This product includes software developed by the |
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23 * Walt Disney Internet Group (http://opensource.go.com/)." |
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24 * Alternately, this acknowledgment may appear in the software itself, |
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25 * if and wherever such third-party acknowledgments normally appear. |
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26 * |
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27 * 4. The names "Tea", "TeaServlet", "Kettle", "Trove" and "BeanDoc" must |
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28 * not be used to endorse or promote products derived from this |
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29 * software without prior written permission. For written |
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30 * permission, please contact opensource@dig.com. |
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31 * |
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32 * 5. Products derived from this software may not be called "Tea", |
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33 * "TeaServlet", "Kettle" or "Trove", nor may "Tea", "TeaServlet", |
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34 * "Kettle", "Trove" or "BeanDoc" appear in their name, without prior |
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35 * written permission of the Walt Disney Internet Group. |
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36 * |
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37 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED |
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38 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
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39 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE |
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40 * DISCLAIMED. IN NO EVENT SHALL THE WALT DISNEY INTERNET GROUP OR ITS |
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41 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, |
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42 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, |
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43 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR |
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44 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY |
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45 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
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46 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
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47 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
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48 * ==================================================================== |
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49 * |
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50 * For more information about Tea, please see http://opensource.go.com/. |
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51 */ |
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52 |
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53 package com.go.trove.util; |
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54 |
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55 import java.util.*; |
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56 |
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57 /****************************************************************************** |
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58 * A ThreadPool contains a collection of re-usable threads. There is a slight |
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59 * performance overhead in creating new threads, and so a ThreadPool can |
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60 * improve performance in systems that create short-lived threads. Pooled |
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61 * threads operate on Runnable targets and return back to the pool when the |
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62 * Runnable.run method exits. |
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63 * |
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64 * @author Brian S O'Neill |
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65 * @version |
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66 * <!--$$Revision: 1.1 $-->, <!--$$JustDate:--> 01/03/12 <!-- $--> |
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67 */ |
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68 public class ThreadPool extends ThreadGroup { |
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69 private static int cThreadID; |
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70 |
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71 private synchronized static int nextThreadID() { |
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72 return cThreadID++; |
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73 } |
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74 |
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75 // Fields that use the monitor of this instance. |
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76 |
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77 private long mTimeout = -1; |
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78 private long mIdleTimeout = -1; |
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79 |
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80 // Fields that use the mListeners monitor. |
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81 |
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82 private Collection mListeners = new LinkedList(); |
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83 |
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84 // Fields that use the mPool monitor. |
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85 |
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86 // Pool is accessed like a stack. |
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87 private LinkedList mPool; |
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88 private int mMax; |
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89 private int mActive; |
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90 private boolean mDaemon; |
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91 private int mPriority; |
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92 private boolean mClosed; |
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93 |
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94 /** |
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95 * Create a ThreadPool of daemon threads. |
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96 * |
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97 * @param name Name of ThreadPool |
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98 * @param max The maximum allowed number of threads |
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99 * |
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100 * @throws IllegalArgumentException |
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101 */ |
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102 public ThreadPool(String name, int max) |
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103 throws IllegalArgumentException { |
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104 |
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105 this(name, max, true); |
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106 } |
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107 |
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108 /** |
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109 * Create a ThreadPool of daemon threads. |
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110 * |
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111 * @param parent Parent ThreadGroup |
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112 * @param name Name of ThreadPool |
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113 * @param max The maximum allowed number of threads |
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114 * |
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115 * @throws IllegalArgumentException |
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116 */ |
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117 public ThreadPool(ThreadGroup parent, String name, int max) |
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118 throws IllegalArgumentException { |
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119 |
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120 this(parent, name, max, true); |
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121 } |
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122 |
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123 /** |
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124 * Create a ThreadPool. |
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125 * |
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126 * @param name Name of ThreadPool |
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127 * @param max The maximum allowed number of threads |
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128 * @param daemon Set to true to create ThreadPool of daemon threads |
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129 * |
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130 * @throws IllegalArgumentException |
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131 */ |
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132 public ThreadPool(String name, int max, boolean daemon) |
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133 throws IllegalArgumentException { |
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134 |
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135 super(name); |
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136 |
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137 init(max, daemon); |
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138 } |
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139 |
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140 /** |
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141 * Create a ThreadPool. |
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142 * |
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143 * @param parent Parent ThreadGroup |
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144 * @param name Name of ThreadPool |
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145 * @param max The maximum allowed number of threads |
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146 * @param daemon Set to true to create ThreadPool of daemon threads |
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147 * |
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148 * @throws IllegalArgumentException |
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149 */ |
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150 public ThreadPool(ThreadGroup parent, String name, int max,boolean daemon) |
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151 throws IllegalArgumentException { |
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152 |
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153 super(parent, name); |
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154 |
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155 init(max, daemon); |
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156 } |
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157 |
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158 private void init(int max, boolean daemon) |
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159 throws IllegalArgumentException { |
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160 |
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161 if (max <= 0) { |
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162 throw new IllegalArgumentException |
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163 ("Maximum number of threads must be greater than zero: " + |
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164 max); |
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165 } |
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166 |
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167 mMax = max; |
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168 |
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169 mDaemon = daemon; |
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170 mPriority = Thread.currentThread().getPriority(); |
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171 mClosed = false; |
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172 |
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173 mPool = new LinkedList(); |
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174 } |
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175 |
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176 /** |
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177 * Sets the timeout (in milliseconds) for getting threads from the pool |
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178 * or for closing the pool. A negative value specifies an infinite timeout. |
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179 * Calling the start method that accepts a timeout value will override |
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180 * this setting. |
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181 */ |
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182 public synchronized void setTimeout(long timeout) { |
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183 mTimeout = timeout; |
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184 } |
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185 |
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186 /** |
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187 * Returns the timeout (in milliseconds) for getting threads from the pool. |
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188 * The default value is negative, which indicates an infinite wait. |
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189 */ |
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190 public synchronized long getTimeout() { |
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191 return mTimeout; |
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192 } |
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193 |
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194 /** |
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195 * Sets the timeout (in milliseconds) for idle threads to exit. A negative |
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196 * value specifies that an idle thread never exits. |
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197 */ |
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198 public synchronized void setIdleTimeout(long timeout) { |
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199 mIdleTimeout = timeout; |
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200 } |
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201 |
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202 /** |
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203 * Returns the idle timeout (in milliseconds) for threads to exit. The |
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204 * default value is negative, which indicates that idle threads never exit. |
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205 */ |
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206 public synchronized long getIdleTimeout() { |
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207 return mIdleTimeout; |
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208 } |
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209 |
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210 public void addThreadPoolListener(ThreadPoolListener listener) { |
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211 synchronized (mListeners) { |
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212 mListeners.add(listener); |
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213 } |
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214 } |
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215 |
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216 public void removeThreadPoolListener(ThreadPoolListener listener) { |
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217 synchronized (mListeners) { |
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218 mListeners.remove(listener); |
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219 } |
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220 } |
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221 |
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222 /** |
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223 * Returns the initial priority given to each thread in the pool. The |
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224 * default value is that of the thread that created the ThreadPool. |
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225 */ |
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226 public int getPriority() { |
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227 synchronized (mPool) { |
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228 return mPriority; |
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229 } |
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230 } |
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231 |
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232 /** |
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233 * Sets the priority given to each thread in the pool. |
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234 * |
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235 * @throws IllegalArgumentException if priority is out of range |
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236 */ |
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237 public void setPriority(int priority) throws IllegalArgumentException { |
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238 if (priority < Thread.MIN_PRIORITY || priority > Thread.MAX_PRIORITY) { |
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239 throw new IllegalArgumentException |
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240 ("Priority out of range: " + priority); |
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241 } |
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242 |
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243 synchronized (mPool) { |
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244 mPriority = priority; |
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245 } |
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246 } |
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247 |
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248 /** |
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249 * @return The maximum allowed number of threads. |
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250 */ |
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251 public int getMaximumAllowed() { |
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252 synchronized (mPool) { |
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253 return mMax; |
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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 * @return The number of currently available threads in the pool. |
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259 */ |
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260 public int getAvailableCount() { |
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261 synchronized (mPool) { |
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262 return mPool.size(); |
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263 } |
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264 } |
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265 |
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266 /** |
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267 * @return The total number of threads in the pool that are either |
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268 * available or in use. |
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269 */ |
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270 public int getPooledCount() { |
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271 synchronized (mPool) { |
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272 return mActive; |
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273 } |
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274 } |
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275 |
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276 /** |
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277 * @return The total number of threads in the ThreadGroup. |
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278 */ |
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279 public int getThreadCount() { |
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280 return activeCount(); |
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281 } |
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282 |
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283 /** |
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284 * @return Each thread that is active in the entire ThreadGroup. |
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285 */ |
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286 public Thread[] getAllThreads() { |
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287 int count = activeCount(); |
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288 Thread[] threads = new Thread[count]; |
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289 count = enumerate(threads); |
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290 if (count >= threads.length) { |
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291 return sort(threads); |
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292 } |
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293 else { |
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294 Thread[] newThreads = new Thread[count]; |
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295 System.arraycopy(threads, 0, newThreads, 0, count); |
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296 return sort(newThreads); |
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297 } |
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298 } |
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299 |
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300 private Thread[] sort(Thread[] threads) { |
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301 Comparator c = BeanComparator.forClass(Thread.class) |
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302 .orderBy("threadGroup.name") |
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303 .orderBy("name") |
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304 .orderBy("priority"); |
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305 Arrays.sort(threads, c); |
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306 return threads; |
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307 } |
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308 |
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309 /** |
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310 * Waits for a Thread to become available and starts a Runnable in it. |
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311 * If there are no available threads and the number of active threads is |
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312 * less than the maximum allowed, then a newly created thread is returned. |
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313 * |
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314 * @param target The Runnable instance that gets started by the returned |
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315 * thread. |
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316 * @exception NoThreadException If no thread could be obtained. |
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317 * @exception InterruptedException If interrupted while waiting for a |
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318 * thread to become available. |
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319 * @return A Thread that has been started on the given Runnable. |
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320 */ |
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321 public Thread start(Runnable target) |
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322 throws NoThreadException, InterruptedException |
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323 { |
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324 try { |
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325 return start0(target, getTimeout(), null); |
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326 } |
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327 catch (NoThreadException e) { |
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328 e.fillInStackTrace(); |
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329 throw e; |
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330 } |
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331 } |
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332 |
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333 /** |
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334 * Waits for a Thread to become available and starts a Runnable in it. |
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335 * If there are no available threads and the number of active threads is |
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336 * less than the maximum allowed, then a newly created thread is returned. |
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337 * |
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338 * @param target The Runnable instance that gets started by the returned |
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339 * thread. |
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340 * @param timeout Milliseconds to wait for a thread to become |
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341 * available. If zero, don't wait at all. If negative, wait forever. |
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342 * @exception NoThreadException If no thread could be obtained. |
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343 * @exception InterruptedException If interrupted while waiting for a |
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344 * thread to become available. |
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345 * @return A Thread that has been started on the given Runnable. |
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346 */ |
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347 public Thread start(Runnable target, long timeout) |
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348 throws NoThreadException, InterruptedException |
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349 { |
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350 try { |
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351 return start0(target, timeout, null); |
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352 } |
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353 catch (NoThreadException e) { |
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354 e.fillInStackTrace(); |
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355 throw e; |
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356 } |
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357 } |
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358 |
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359 |
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360 /** |
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361 * Waits for a Thread to become available and starts a Runnable in it. |
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362 * If there are no available threads and the number of active threads is |
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363 * less than the maximum allowed, then a newly created thread is returned. |
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364 * |
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365 * @param target The Runnable instance that gets started by the returned |
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366 * thread. |
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367 * @param name The name to give the thread. |
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368 * @exception NoThreadException If no thread could be obtained. |
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369 * @exception InterruptedException If interrupted while waiting for a |
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370 * thread to become available. |
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371 * @return A Thread that has been started on the given Runnable. |
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372 */ |
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373 public Thread start(Runnable target, String name) |
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374 throws NoThreadException, InterruptedException |
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375 { |
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376 try { |
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377 return start0(target, getTimeout(), name); |
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378 } |
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379 catch (NoThreadException e) { |
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380 e.fillInStackTrace(); |
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381 throw e; |
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382 } |
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383 } |
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384 |
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385 /** |
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386 * Waits for a Thread to become available and starts a Runnable in it. |
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387 * If there are no available threads and the number of active threads is |
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388 * less than the maximum allowed, then a newly created thread is returned. |
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389 * |
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390 * @param target The Runnable instance that gets started by the returned |
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391 * thread. |
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392 * @param timeout Milliseconds to wait for a thread to become |
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393 * @param name The name to give the thread. |
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394 * available. If zero, don't wait at all. If negative, wait forever. |
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395 * @exception NoThreadException If no thread could be obtained. |
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396 * @exception InterruptedException If interrupted while waiting for a |
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397 * thread to become available. |
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398 * @return A Thread that has been started on the given Runnable. |
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399 */ |
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400 public Thread start(Runnable target, long timeout, String name) |
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401 throws NoThreadException, InterruptedException |
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402 { |
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403 try { |
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404 return start0(target, timeout, name); |
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405 } |
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406 catch (NoThreadException e) { |
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407 e.fillInStackTrace(); |
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408 throw e; |
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409 } |
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410 } |
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411 |
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412 private Thread start0(Runnable target, long timeout, String name) |
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413 throws NoThreadException, InterruptedException |
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414 { |
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415 PooledThread thread; |
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416 |
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417 while (true) { |
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418 synchronized (mPool) { |
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419 closeCheck(); |
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420 |
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421 // Obtain a thread from the pool if non-empty. |
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422 if (mPool.size() > 0) { |
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423 thread = (PooledThread)mPool.removeLast(); |
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424 } |
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425 else { |
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426 // Create a new thread if the number of active threads |
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427 // is less than the maximum allowed. |
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428 if (mActive < mMax) { |
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429 return startThread(target, name); |
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430 } |
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431 else { |
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432 break; |
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433 } |
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434 } |
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435 } |
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436 |
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437 if (name != null) { |
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438 thread.setName(name); |
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439 } |
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440 |
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441 if (thread.setTarget(target)) { |
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442 return thread; |
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443 } |
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444 |
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445 // Couldn't set the target because the pooled thread is exiting. |
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446 // Wait for it to exit to ensure that the active count is less |
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447 // than the maximum and try to obtain another thread. |
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448 thread.join(); |
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449 } |
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450 |
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451 if (timeout == 0) { |
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452 throw new NoThreadException("No thread available from " + this); |
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453 } |
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454 |
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455 // Wait for a thread to become available in the pool. |
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456 synchronized (mPool) { |
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457 closeCheck(); |
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458 |
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459 if (timeout < 0) { |
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460 while (mPool.size() <= 0) { |
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461 mPool.wait(0); |
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462 closeCheck(); |
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463 } |
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464 } |
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465 else { |
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466 long expireTime = System.currentTimeMillis() + timeout; |
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467 while (mPool.size() <= 0) { |
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468 mPool.wait(timeout); |
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469 closeCheck(); |
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470 |
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471 // Thread could have been notified, but another thread may |
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472 // have stolen the thread away. |
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473 if (mPool.size() <= 0 && |
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474 System.currentTimeMillis() > expireTime) { |
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475 |
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476 throw new NoThreadException |
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477 ("No thread available after waiting " + |
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478 timeout + " milliseconds: " + this); |
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479 } |
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480 } |
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481 } |
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482 |
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483 thread = (PooledThread)mPool.removeLast(); |
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484 if (name != null) { |
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485 thread.setName(name); |
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486 } |
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487 |
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488 if (thread.setTarget(target)) { |
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489 return thread; |
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490 } |
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491 } |
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492 |
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493 // Couldn't set the target because the pooled thread is exiting. |
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494 // Wait for it to exit to ensure that the active count is less |
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495 // than the maximum and create a new thread. |
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496 thread.join(); |
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497 return startThread(target, name); |
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498 } |
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499 |
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500 public boolean isClosed() { |
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501 return mClosed; |
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502 } |
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503 |
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504 /** |
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505 * Will close down all the threads in the pool as they become |
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506 * available. This method may block forever if any threads are |
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507 * never returned to the thread pool. |
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508 */ |
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509 public void close() throws InterruptedException { |
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510 close(getTimeout()); |
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511 } |
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512 |
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513 /** |
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parents:
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514 * Will close down all the threads in the pool as they become |
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Dan Creswell <dan.creswell@gmail.com>
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515 * available. If all the threads cannot become available within the |
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516 * specified timeout, any active threads not yet returned to the |
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517 * thread pool are interrupted. |
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518 * |
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parents:
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519 * @param timeout Milliseconds to wait before unavailable threads |
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parents:
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520 * are interrupted. If zero, don't wait at all. If negative, wait forever. |
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521 */ |
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522 public void close(long timeout) throws InterruptedException { |
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523 synchronized (mPool) { |
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524 mClosed = true; |
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525 mPool.notifyAll(); |
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parents:
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526 |
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527 if (timeout != 0) { |
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528 if (timeout < 0) { |
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Dan Creswell <dan.creswell@gmail.com>
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529 while (mActive > 0) { |
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530 // Infinite wait for notification. |
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|
531 mPool.wait(0); |
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parents:
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|
532 } |
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533 } |
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parents:
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534 else { |
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parents:
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535 long expireTime = System.currentTimeMillis() + timeout; |
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536 while (mActive > 0) { |
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537 mPool.wait(timeout); |
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538 if (System.currentTimeMillis() > expireTime) { |
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parents:
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539 break; |
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540 } |
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541 } |
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542 } |
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543 } |
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544 } |
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545 |
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546 interrupt(); |
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547 } |
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548 |
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549 private PooledThread startThread(Runnable target, String name) { |
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Dan Creswell <dan.creswell@gmail.com>
parents:
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550 PooledThread thread; |
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parents:
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|
551 |
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552 synchronized (mPool) { |
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553 mActive++; |
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554 thread = new PooledThread(getName() + ' ' + nextThreadID()); |
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parents:
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555 thread.setPriority(mPriority); |
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parents:
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556 thread.setDaemon(mDaemon); |
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parents:
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|
557 |
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parents:
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558 if (name != null) { |
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Dan Creswell <dan.creswell@gmail.com>
parents:
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559 thread.setName(name); |
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parents:
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changeset
|
560 } |
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Initial checkin of blitz 2.0 fcs - no installer yet.
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parents:
diff
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|
561 |
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parents:
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562 thread.setTarget(target); |
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Dan Creswell <dan.creswell@gmail.com>
parents:
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563 thread.start(); |
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parents:
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|
564 } |
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parents:
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|
565 |
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parents:
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changeset
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566 ThreadPoolEvent event = new ThreadPoolEvent(this, thread); |
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Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
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567 synchronized (mListeners) { |
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Dan Creswell <dan.creswell@gmail.com>
parents:
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|
568 for (Iterator it = mListeners.iterator(); it.hasNext();) { |
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Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
diff
changeset
|
569 ((ThreadPoolListener)it.next()).threadStarted(event); |
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Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
diff
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|
570 } |
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Dan Creswell <dan.creswell@gmail.com>
parents:
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|
571 } |
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Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
diff
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|
572 |
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parents:
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573 return thread; |
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parents:
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|
574 } |
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parents:
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|
575 |
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Dan Creswell <dan.creswell@gmail.com>
parents:
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|
576 private void closeCheck() throws NoThreadException { |
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parents:
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577 if (mClosed) { |
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parents:
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578 throw new NoThreadException("Thread pool is closed", true); |
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parents:
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|
579 } |
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parents:
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|
580 } |
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parents:
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|
581 |
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parents:
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|
582 void threadAvailable(PooledThread thread) { |
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parents:
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changeset
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583 synchronized (mPool) { |
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Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
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584 if (thread.getPriority() != mPriority) { |
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Initial checkin of blitz 2.0 fcs - no installer yet.
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parents:
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changeset
|
585 thread.setPriority(mPriority); |
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parents:
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|
586 } |
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parents:
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changeset
|
587 mPool.addLast(thread); |
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Dan Creswell <dan.creswell@gmail.com>
parents:
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588 mPool.notify(); |
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parents:
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changeset
|
589 } |
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parents:
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changeset
|
590 } |
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Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
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changeset
|
591 |
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Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
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|
592 void threadExiting(PooledThread thread) { |
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Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
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changeset
|
593 synchronized (mPool) { |
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parents:
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|
594 if (mPool.remove(thread)) { |
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Dan Creswell <dan.creswell@gmail.com>
parents:
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changeset
|
595 mActive--; |
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parents:
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changeset
|
596 |
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Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
diff
changeset
|
597 ThreadPoolEvent event = new ThreadPoolEvent(this, thread); |
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Dan Creswell <dan.creswell@gmail.com>
parents:
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changeset
|
598 synchronized (mListeners) { |
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Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
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changeset
|
599 for (Iterator it = mListeners.iterator(); it.hasNext();) { |
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Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
diff
changeset
|
600 ((ThreadPoolListener)it.next()).threadExiting(event); |
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parents:
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changeset
|
601 } |
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Initial checkin of blitz 2.0 fcs - no installer yet.
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parents:
diff
changeset
|
602 } |
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Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
diff
changeset
|
603 |
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Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
diff
changeset
|
604 mPool.notify(); |
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parents:
diff
changeset
|
605 } |
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Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
diff
changeset
|
606 } |
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Dan Creswell <dan.creswell@gmail.com>
parents:
diff
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607 } |
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608 |
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609 private class PooledThread extends Thread { |
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610 private String mOriginalName; |
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611 private Runnable mTarget; |
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612 private boolean mExiting; |
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613 |
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614 public PooledThread(String name) { |
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615 super(ThreadPool.this, name); |
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616 mOriginalName = name; |
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617 } |
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618 |
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619 synchronized boolean setTarget(Runnable target) { |
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620 if (mTarget != null) { |
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621 throw new IllegalStateException |
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622 ("Target runnable in pooled thread is already set"); |
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623 } |
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624 |
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625 if (mExiting) { |
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626 return false; |
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627 } |
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628 else { |
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629 mTarget = target; |
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630 notify(); |
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631 return true; |
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632 } |
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633 } |
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634 |
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635 private synchronized Runnable waitForTarget() { |
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636 Runnable target; |
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637 |
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638 if ((target = mTarget) == null) { |
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639 long idle = getIdleTimeout(); |
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640 |
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641 if ((target = mTarget) == null) { |
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642 if (idle != 0) { |
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643 try { |
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644 if (idle < 0) { |
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645 wait(0); |
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646 } |
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647 else { |
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648 wait(idle); |
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649 } |
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650 } |
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651 catch (InterruptedException e) { |
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652 } |
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653 } |
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654 |
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655 if ((target = mTarget) == null) { |
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656 mExiting = true; |
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657 } |
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658 } |
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659 } |
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660 |
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661 return target; |
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662 } |
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663 |
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664 public void run() { |
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665 try { |
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666 while (!isClosed()) { |
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667 if (Thread.interrupted()) { |
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668 continue; |
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parents:
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669 } |
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670 |
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671 Runnable target; |
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672 |
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673 if ((target = waitForTarget()) == null) { |
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674 break; |
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675 } |
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676 |
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677 try { |
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678 target.run(); |
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679 } |
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680 catch (ThreadDeath death) { |
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681 break; |
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682 } |
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683 catch (Throwable e) { |
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684 uncaughtException(Thread.currentThread(), e); |
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685 e = null; |
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686 } |
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parents:
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|
687 |
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parents:
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688 // Allow the garbage collector to reclaim target from |
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689 // stack while we wait for another target. |
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690 target = null; |
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parents:
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|
691 |
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692 mTarget = null; |
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693 setName(mOriginalName); |
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|
694 threadAvailable(this); |
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parents:
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|
695 } |
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parents:
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changeset
|
696 } |
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697 finally { |
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698 threadExiting(this); |
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|
699 } |
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parents:
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changeset
|
700 } |
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Initial checkin of blitz 2.0 fcs - no installer yet.
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parents:
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changeset
|
701 } |
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Initial checkin of blitz 2.0 fcs - no installer yet.
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parents:
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|
702 } |