/*
 * JBoss, Home of Professional Open Source.
 * Copyright 2008, Red Hat Middleware LLC, and individual contributors
 * as indicated by the @author tags. See the copyright.txt file 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.jboss.test.jca.mbean;

import org.jboss.system.ServiceMBeanSupport;

/** 
 * Server Side MultiThread TM test.
 * 
 * Based on mbean.TMTest
 *
 * @author <a href="dimitris@jboss.org">Dimitris Andreadis</a>
 * @version $Revision: 81036 $
 */
public class MTTest extends ServiceMBeanSupport
   implements MTTestMBean
{
   public void testMTOperations(String test, MTOperation[][] ops) throws Exception
   {
      log.info("*** Starting test: " + test);
      MTOperation.init(log);
      
      // find out how many MTOperation[]
      // we'll execute each in a separate thread
      int numOfThreads = ops.length;
      log.info("Number of Threads: " + numOfThreads);
         
      Thread[] threads = new Thread[numOfThreads];
      ExecTask[] tasks = new ExecTask[numOfThreads];
      for (int i = 0; i < numOfThreads; i++)
      {
         tasks[i] = new ExecTask(i, ops[i]);
         threads[i] = new Thread(tasks[i]);
         threads[i].start();
      }
      
      // join the threads before returning and check
      // if any of threads exited with an exception
      Exception caughtException = null;
      for (int i = 0; i < numOfThreads; i++)
      {
         try
         {
            threads[i].join();
            if (tasks[i].exception != null)
            {
               // remember any exception caught; order here is not important,
               // since we don't know which thread finished first.
               caughtException = tasks[i].exception;
            }
         }
         catch (InterruptedException e)
         {
            // retry
            i--;
         }
      }
      log.info("*** Finished test: " + test);
      MTOperation.destroy();
      
      if (caughtException != null)
      {
         throw caughtException;
      }
   }
   
   private class ExecTask implements Runnable
   {
      int threadId;
      MTOperation[] ops;
      Exception exception;
      
      public ExecTask(int threadId, MTOperation[] ops)
      {
         this.threadId = threadId;
         this.ops = ops;
      }
      
      public void run()
      {
         log.info("Starting thread: " + Thread.currentThread().getName());
         try
         {
            for (int i = 0; i < ops.length; ++i)
            {
               ops[i].perform();
            }
         }
         catch (Exception e)
         {
            exception = e;
         }
         finally
         {
            log.info("Finished thread: " + Thread.currentThread().getName());
         }
      }
   }
}
