diff servlet/src/digilib/servlet/DigilibManager.java @ 290:5d0c0da080ec gen2 scaleable_1

digilib servlet version 2 ("scaleable digilib") - first stab at using thread pools to limit resource use - using Dug Leas util.concurrent - doesn't mix with tomcat :-(
author robcast
date Thu, 21 Oct 2004 20:53:37 +0200
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--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/servlet/src/digilib/servlet/DigilibManager.java	Thu Oct 21 20:53:37 2004 +0200
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+/* DigilibManager.java -- work queue manager
+ * 
+ * Digital Image Library servlet components
+ * 
+ * Copyright (C) 2004 Robert Casties (robcast@mail.berlios.de)
+ * 
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the Free
+ * Software Foundation; either version 2 of the License, or (at your option)
+ * any later version.
+ * 
+ * Please read license.txt for the full details. A copy of the GPL may be found
+ * at http://www.gnu.org/copyleft/lgpl.html
+ * 
+ * You should have received a copy of the GNU General Public License along with
+ * this program; if not, write to the Free Software Foundation, Inc., 59 Temple
+ * Place, Suite 330, Boston, MA 02111-1307 USA
+ *  
+ * Created on 18.10.2004
+ */
+
+package digilib.servlet;
+
+import EDU.oswego.cs.dl.util.concurrent.BoundedBuffer;
+import EDU.oswego.cs.dl.util.concurrent.Executor;
+import EDU.oswego.cs.dl.util.concurrent.PooledExecutor;
+
+/** work queue manager.
+ * 
+ * @author casties
+ *
+ */
+public class DigilibManager implements Executor {
+	
+	private PooledExecutor workerQueue = null;
+	
+	private BoundedBuffer jobQueue = null;
+	
+	/**
+	 * @param numFastLanes
+	 * @param numSlowLanes
+	 */
+	public DigilibManager(int numLanes, int queueMax) {
+		super();
+		
+		// create job queue
+		jobQueue = new BoundedBuffer(queueMax);
+		// create work queue
+		workerQueue = new PooledExecutor(jobQueue, numLanes);
+		workerQueue.abortWhenBlocked();
+
+	}
+	
+	
+	public void execute(Runnable worker) throws InterruptedException {
+		workerQueue.execute(worker);
+	}
+	
+	public int getQueueSize() {
+		return jobQueue.size();
+	}
+}