/*
* JBoss, Home of Professional Open Source
* Copyright 2011 Red Hat Inc. and/or its affiliates and other
* contributors as indicated by the @author tags. All rights reserved.
* See the copyright.txt in the distribution for a full listing of
* individual contributors.
*
* This is free software; you can redistribute it and/or modify it
* under the terms of the GNU Lesser General Public License as
* published by the Free Software Foundation; either version 2.1 of
* the License, or (at your option) any later version.
*
* This software is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this software; if not, write to the Free
* Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
* 02110-1301 USA, or see the FSF site: http://www.fsf.org.
*/
package org.infinispan.visualizer.poller;

/**
 * This thread holds the run loop to call poller on a fixed interval set by <code>refrehRate</code>.
 *
 * @param <T>
 * @author <a href="mailto:rtsang@redhat.com">Ray Tsang</a>
 */
public abstract class PollerThread<T> extends Thread {
   private volatile boolean running;

   private final Poller<T> poller;
   private long refreshRate = PollerManager.DEFAULT_REFRESH_RATE;

   public PollerThread(Poller<T> poller) {
      super();
      setDaemon(true);

      this.poller = poller;

      poller.init();
   }

   public void abort() {
      running = false;
      poller.destroy();
   }

   public boolean isRunning() {
      return running;
   }

   abstract protected void doRun();

   @Override
   public void run() {
      running = true;
      while (running) {
         try {
            doRun();
         } catch (Exception e) {
            e.printStackTrace();
         }

         try {
            Thread.sleep(refreshRate);
         } catch (InterruptedException e) {
            Thread.currentThread().interrupt();
         }
      }
   }

   public long getRefreshRate() {
      return refreshRate;
   }

   public void setRefreshRate(long refreshRate) {
      this.refreshRate = refreshRate;
   }

   public Poller<T> getPoller() {
      return poller;
   }

}