bundles/org.simantics.utils.thread/src/org/simantics/utils/threads/AWTThread.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.awt.EventQueue;\r
  19 import java.awt.Toolkit;\r
  20 import java.lang.reflect.Field;\r
  21 import java.lang.reflect.InvocationTargetException;\r
  22 import java.util.List;\r
  23 import java.util.concurrent.AbstractExecutorService;\r
  24 import java.util.concurrent.Executor;\r
  25 import java.util.concurrent.TimeUnit;\r
  26 \r
  27 import javax.swing.SwingUtilities;\r
  28 \r
  29 \r
  30 public class AWTThread extends AbstractExecutorService implements IThreadWorkQueue, Executor {\r
  31         \r
  32         public static AWTThread INSTANCE = new AWTThread();\r
  33         \r
  34         public static IThreadWorkQueue getThreadAccess()\r
  35         {\r
  36                 return INSTANCE;\r
  37         }\r
  38         \r
  39         Field dispatchThread;\r
  40         \r
  41         AWTThread() {\r
  42                 dispatchThread = getDispatchThreadField();\r
  43         }\r
  44         \r
  45         private Field getDispatchThreadField()\r
  46         {\r
  47                 try {\r
  48                         Field f = EventQueue.class.getDeclaredField("dispatchThread");\r
  49                         f.setAccessible(true);\r
  50                         return f;\r
  51                 } catch (SecurityException e) {\r
  52                         throw new RuntimeException(e);\r
  53                 } catch (NoSuchFieldException e) {\r
  54                         throw new RuntimeException(e);\r
  55                 }\r
  56         }\r
  57         \r
  58         @Override\r
  59         public Thread asyncExec(Runnable runnable) {\r
  60                 EventQueue eq = Toolkit.getDefaultToolkit().getSystemEventQueue();\r
  61                 EventQueue.invokeLater(runnable);\r
  62                 try {\r
  63                         return (Thread) dispatchThread.get(eq);\r
  64                 } catch (IllegalArgumentException e1) {\r
  65                         throw new RuntimeException(e1);\r
  66                 } catch (IllegalAccessException e1) {\r
  67                         throw new RuntimeException(e1);\r
  68                 }\r
  69         }\r
  70 \r
  71         @Override\r
  72         public boolean syncExec(Runnable runnable) {\r
  73                 if (EventQueue.isDispatchThread())\r
  74                 {\r
  75                         runnable.run();\r
  76                         return true;\r
  77                 }\r
  78                 \r
  79                 try {\r
  80                         SwingUtilities.invokeAndWait(runnable);\r
  81                         return true;\r
  82                 } catch (InterruptedException e) {\r
  83                         throw new RuntimeException(e);\r
  84                 } catch (InvocationTargetException e) {\r
  85                         throw new RuntimeException(e.getCause());\r
  86                 }\r
  87         }\r
  88 \r
  89         @Override\r
  90         public boolean currentThreadAccess() {\r
  91                 return EventQueue.isDispatchThread();\r
  92         }\r
  93 \r
  94         @Override\r
  95         public Thread getThread() {\r
  96                 EventQueue eq = Toolkit.getDefaultToolkit().getSystemEventQueue();\r
  97                 try {\r
  98                         return (Thread) dispatchThread.get(eq);\r
  99                 } catch (IllegalArgumentException e1) {\r
 100                         throw new RuntimeException(e1);\r
 101                 } catch (IllegalAccessException e1) {\r
 102                         throw new RuntimeException(e1);\r
 103                 }\r
 104         }\r
 105         \r
 106         public String toString() {\r
 107                 return "AWT Thread";\r
 108         }\r
 109 \r
 110         @Override\r
 111         public void execute(Runnable command) {\r
 112                 EventQueue.invokeLater(command);\r
 113         }\r
 114         \r
 115         @Override\r
 116         public void shutdown() {\r
 117         }\r
 118 \r
 119         @Override\r
 120         public List<Runnable> shutdownNow() {\r
 121                 return null;\r
 122         }\r
 123 \r
 124         @Override\r
 125         public boolean isShutdown() {\r
 126                 return false;\r
 127         }\r
 128 \r
 129         @Override\r
 130         public boolean isTerminated() {\r
 131                 return false;\r
 132         }\r
 133 \r
 134         @Override\r
 135         public boolean awaitTermination(long timeout, TimeUnit unit)\r
 136                         throws InterruptedException {\r
 137                 return false;\r
 138         }       \r
 139 \r
 140 }\r