1 files changed, 84 insertions, 0 deletions
diff --git a/systemtap/org.eclipse.linuxtools.systemtap.ui.structures/src/org/eclipse/linuxtools/systemtap/ui/structures/UpdateManager.java b/systemtap/org.eclipse.linuxtools.systemtap.ui.structures/src/org/eclipse/linuxtools/systemtap/ui/structures/UpdateManager.java
new file mode 100644
index 0000000000..f9adbb5a1a
--- /dev/null
+++ b/systemtap/org.eclipse.linuxtools.systemtap.ui.structures/src/org/eclipse/linuxtools/systemtap/ui/structures/UpdateManager.java
@@ -0,0 +1,84 @@
+/*******************************************************************************
+ * Copyright (c) 2006 IBM Corporation.
+ * 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:
+ *     IBM Corporation - Jeff Briggs, Henry Hughes, Ryan Morse
+ *******************************************************************************/
+
+package org.eclipse.linuxtools.systemtap.ui.structures;
+
+import java.util.ArrayList;
+import java.util.Timer;
+import java.util.TimerTask;
+
+import org.eclipse.linuxtools.systemtap.ui.structures.listeners.IUpdateListener;
+
+
+
+public class UpdateManager {
+	public UpdateManager(int delay) {
+		updateListeners = new ArrayList<IUpdateListener>();
+		stopped = false;
+		disposed = false;
+		timer = new Timer("Update Manager", true);
+		timer.scheduleAtFixedRate(new Notify(), delay, delay);
+	}
+	
+	/**
+	 * Terminates the timer and removes all update listeners.
+	 */
+	public void stop() {
+		if(!stopped) {
+			stopped = true;
+			timer.cancel();
+			for(int i=0; i<updateListeners.size(); i++)
+				removeUpdateListener((IUpdateListener)updateListeners.get(i));
+		}
+	}
+	
+	public void addUpdateListener(IUpdateListener l) {
+		if(!updateListeners.contains(l))
+			updateListeners.add(l);
+	}
+	public void removeUpdateListener(IUpdateListener l) {
+		if(updateListeners.contains(l))
+			updateListeners.remove(l);
+	}
+	
+	public boolean isRunning() {
+		return !stopped;
+	}
+	
+	public void dispose() {
+		if(!disposed) {
+			disposed = true;
+			stop();
+			timer = null;
+			updateListeners = null;
+		}
+	}
+	
+	/**
+	 * Handle any events that are timed to occur.
+	 */
+	private class Notify extends TimerTask {
+		public void run() {
+			try{
+			if(!stopped) {
+				for(int i = 0; i < updateListeners.size(); i++)
+					((IUpdateListener)(updateListeners.get(i))).handleUpdateEvent();
+			}
+			}catch(Exception e) {;}
+		}
+			
+	}
+	
+	private Timer timer;
+	private ArrayList<IUpdateListener> updateListeners;
+	private boolean stopped;
+	private boolean disposed;
+}