Mercurial > hg > blitz_stable
annotate src/EDU/oswego/cs/dl/util/concurrent/TimedCallable.java @ 8:fa7203ea1622
Remove some dead code (Dave Brosius)
author | Dan Creswell <dan.creswell@gmail.com> |
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date | Sat, 23 May 2009 11:27:41 +0100 |
parents | 3dc0c5604566 |
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1 /* |
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2 TimedCallable.java |
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3 |
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4 Originally written by Joseph Bowbeer and released into the public domain. |
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5 This may be used for any purposes whatsoever without acknowledgment. |
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6 |
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7 Originally part of jozart.swingutils. |
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8 Adapted by Doug Lea for util.concurrent. |
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9 |
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10 History: |
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11 Date Who What |
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12 11dec1999 dl Adapted for util.concurrent |
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13 |
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14 */ |
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15 |
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16 package EDU.oswego.cs.dl.util.concurrent; |
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17 |
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18 /** |
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19 * TimedCallable runs a Callable function for a given length of time. |
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20 * The function is run in its own thread. If the function completes |
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21 * in time, its result is returned; otherwise the thread is interrupted |
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22 * and an InterruptedException is thrown. |
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23 * <p> |
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24 * Note: TimedCallable will always return within the given time limit |
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25 * (modulo timer inaccuracies), but whether or not the worker thread |
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26 * stops in a timely fashion depends on the interrupt handling in the |
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27 * Callable function's implementation. |
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28 * |
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29 * @author Joseph Bowbeer |
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30 * @version 1.0 |
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31 * |
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32 * <p>[<a href="http://gee.cs.oswego.edu/dl/classes/EDU/oswego/cs/dl/util/concurrent/intro.html"> Introduction to this package. </a>] |
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33 |
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34 */ |
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35 |
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36 public class TimedCallable extends ThreadFactoryUser implements Callable { |
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37 |
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38 private final Callable function; |
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39 private final long millis; |
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40 |
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41 public TimedCallable(Callable function, long millis) { |
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42 this.function = function; |
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43 this.millis = millis; |
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44 } |
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45 |
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46 public Object call() throws Exception { |
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47 |
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48 FutureResult result = new FutureResult(); |
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49 |
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50 Thread thread = getThreadFactory().newThread(result.setter(function)); |
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51 |
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52 thread.start(); |
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53 |
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54 try { |
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55 return result.timedGet(millis); |
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56 } |
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57 catch (InterruptedException ex) { |
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58 /* Stop thread if we were interrupted or timed-out |
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59 while waiting for the result. */ |
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60 thread.interrupt(); |
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61 throw ex; |
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62 } |
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63 } |
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64 } |