bundles/org.simantics.utils.thread/src/org/simantics/utils/threads/ExecutorWorker.java

   1 /*******************************************************************************\r
   2  * Copyright (c) 2007, 2010 Association for Decentralized Information Management\r
   3  * in Industry THTH ry.\r
   4  * All rights reserved. This program and the accompanying materials\r
   5  * are made available under the terms of the Eclipse Public License v1.0\r
   6  * which accompanies this distribution, and is available at\r
   7  * http://www.eclipse.org/legal/epl-v10.html\r
   8  *\r
   9  * Contributors:\r
  10  *     VTT Technical Research Centre of Finland - initial API and implementation\r
  11  *******************************************************************************/\r
  12 /*\r
  13  *\r
  14  * @author Toni Kalajainen\r
  15  */\r
  16 package org.simantics.utils.threads;\r
  17 \r
  18 import java.util.concurrent.Callable;\r
  19 import java.util.concurrent.ScheduledFuture;\r
  20 import java.util.concurrent.ScheduledThreadPoolExecutor;\r
  21 import java.util.concurrent.TimeUnit;\r
  22 \r
  23 \r
  24 public class ExecutorWorker {\r
  25         \r
  26         private static ExecutorWorker instance;\r
  27         \r
  28         static class DelayedExecution implements Comparable<DelayedExecution> {\r
  29                 Executable executable;\r
  30                 long executionTime;\r
  31                 @Override\r
  32                 public int compareTo(DelayedExecution o) {\r
  33                         if (o.executionTime<executionTime) return -1;\r
  34                         if (o.executionTime>executionTime) return 1;\r
  35                         return 0;\r
  36                 }\r
  37         }\r
  38 \r
  39         public static ExecutorWorker getInstance()\r
  40         {\r
  41                 if (instance == null)\r
  42                         instance = new ExecutorWorker();\r
  43                 return instance;\r
  44         }\r
  45         \r
  46         ExecutorWorker() {              \r
  47         }       \r
  48 \r
  49         ScheduledThreadPoolExecutor pool = new ScheduledThreadPoolExecutor(1);\r
  50         \r
  51         public synchronized ScheduledFuture<Object> timerExec(final Executable executable, int delay)\r
  52         {\r
  53                 Callable<Object> c = new Callable<Object>() {\r
  54                         @Override\r
  55                         public Object call() throws Exception {\r
  56                 // FIXME: executable.runnable gets called twice!\r
  57                                 ThreadUtils.asyncExec(executable.threadAccess, executable.runnable);\r
  58                                 //executable.runnable.run();\r
  59                                 return null;\r
  60                         }\r
  61                 };              \r
  62                 return pool.schedule(c, delay, TimeUnit.MILLISECONDS);\r
  63         }\r
  64 \r
  65 }\r