From 4ab54fe231569ee20c82845bfaab9baf1f6bceab Mon Sep 17 00:00:00 2001
From: Ted Williams <ted@ted.net>
Date: Tue, 23 Jan 2007 17:11:32 +0000
Subject: [PATCH] this executor utilizes the SWT UI dispatch thread.

---
 .../ui/concurrent/SWTDispatchDsfExecutor.java | 137 ++++++++++++++++++
 1 file changed, 137 insertions(+)
 create mode 100644 plugins/org.eclipse.dd.dsf.ui/src/org/eclipse/dd/dsf/ui/concurrent/SWTDispatchDsfExecutor.java

diff --git a/plugins/org.eclipse.dd.dsf.ui/src/org/eclipse/dd/dsf/ui/concurrent/SWTDispatchDsfExecutor.java b/plugins/org.eclipse.dd.dsf.ui/src/org/eclipse/dd/dsf/ui/concurrent/SWTDispatchDsfExecutor.java
new file mode 100644
index 00000000000..71e22929638
--- /dev/null
+++ b/plugins/org.eclipse.dd.dsf.ui/src/org/eclipse/dd/dsf/ui/concurrent/SWTDispatchDsfExecutor.java
@@ -0,0 +1,137 @@
+/*******************************************************************************
+ * Copyright (c) 2007 Wind River Systems and others.
+ * All rights reserved. This program and the accompanying materials
+ * are made available under the terms of the Eclipse Public License v1.0
+ * which accompanies this distribution, and is available at
+ * http://www.eclipse.org/legal/epl-v10.html
+ * 
+ * Contributors:
+ *     Wind River Systems - initial API and implementation
+ *******************************************************************************/
+
+package org.eclipse.dd.dsf.ui.concurrent;
+
+import java.util.concurrent.Callable;
+import java.util.concurrent.Future;
+import java.util.concurrent.ScheduledFuture;
+import java.util.concurrent.TimeUnit;
+
+import org.eclipse.dd.dsf.concurrent.DefaultDsfExecutor;
+import org.eclipse.swt.widgets.Display;
+
+public class SWTDispatchDsfExecutor extends DefaultDsfExecutor 
+{
+
+	public SWTDispatchDsfExecutor()
+	{
+		super();
+	}
+	
+	private <V> Callable<V> createSWTDispatchCallable(final Callable<V> callable)
+	{
+		return new Callable<V>()
+		{
+			public V call() throws Exception
+			{
+				final Object[] v = new Object[1];
+				final Throwable[] e = new Throwable[1];
+				
+				Display.getDefault().syncExec(new Runnable()
+				{
+					public void run()
+					{
+						try
+						{
+							v[0] = callable.call();
+						}
+						catch(Throwable exception)
+						{
+							e[0] = exception;
+						}
+					}
+				});
+				
+				if(e[0] instanceof RuntimeException)
+					throw (RuntimeException) e[0];
+				else if(e[0] instanceof Exception)
+					throw (Exception) e[0];
+				
+				return (V) v[0];
+			}
+		};
+	}
+	
+	private Runnable createSWTDispatchRunnable(final Runnable runnable)
+	{
+		return new Runnable()
+		{
+			public void run()
+			{
+				final Throwable[] e = new Throwable[1];
+				
+				Display.getDefault().syncExec(new Runnable()
+				{
+					public void run()
+					{
+						try
+						{
+							runnable.run();
+						}
+						catch(Throwable exception)
+						{
+							e[0] = exception;
+						}
+					}
+				});
+				
+				if(e[0] instanceof RuntimeException)
+					throw (RuntimeException) e[0];
+			}
+		};
+	}
+	
+	@Override
+	public <V> ScheduledFuture<V> schedule(final Callable<V> callable, long delay,
+			TimeUnit unit) {
+		return super.schedule(createSWTDispatchCallable(callable), delay, unit);
+	}
+
+	@Override
+	public ScheduledFuture<?> schedule(Runnable command, long delay,
+			TimeUnit unit) {
+		return super.schedule(createSWTDispatchRunnable(command), delay, unit);
+	}
+
+	@Override
+	public ScheduledFuture<?> scheduleAtFixedRate(Runnable command,
+			long initialDelay, long period, TimeUnit unit) {
+		return super.scheduleAtFixedRate(createSWTDispatchRunnable(command), initialDelay, period, unit);
+	}
+
+	@Override
+	public ScheduledFuture<?> scheduleWithFixedDelay(Runnable command,
+			long initialDelay, long delay, TimeUnit unit) {
+		return super.scheduleWithFixedDelay(createSWTDispatchRunnable(command), initialDelay, delay, unit);
+	}
+
+	@Override
+	public void execute(Runnable command) {
+		super.execute(createSWTDispatchRunnable(command));
+	}
+
+	@Override
+	public <T> Future<T> submit(Callable<T> callable) {
+		return super.submit(createSWTDispatchCallable(callable));
+	}
+
+	@Override
+	public <T> Future<T> submit(Runnable command, T result) {
+		return super.submit(createSWTDispatchRunnable(command), result);
+	}
+
+	@Override
+	public Future<?> submit(Runnable command) {
+		return super.submit(createSWTDispatchRunnable(command));
+	}
+
+}