ConnectionPoolMBeanProxyFactory.java :  » Web-Server » xsocket » org » xsocket » connection » Java Open Source

/*
 *  Copyright (c) xsocket.org, 2006 - 2008. All rights reserved.
 *
 *  This library 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 library 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 library; if not, write to the Free Software
 *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 *
 * Please refer to the LGPL license at: http://www.gnu.org/copyleft/lesser.txt
 * The latest copy of this software may be found on http://www.xsocket.org/
 */
package org.xsocket.connection;

import java.lang.management.ManagementFactory;
import java.util.logging.Level;
import java.util.logging.Logger;

import javax.management.JMException;
import javax.management.MBeanServer;
import javax.management.ObjectName;

import org.xsocket.ILifeCycle;
import org.xsocket.IntrospectionBasedDynamicMBean;






/**
 * A Mbean proxy factory, which creates and registers an appropriated mbean 
 * for a given connction pool instance.  
 * 
 * <br><br><b>This class is for test purpose only, and will be modified or discarded in future versions</b>
 * 
 * @author grro@xsocket.org
 */
final class ConnectionPoolMBeanProxyFactory {

  
  
  /**
   * creates and registers a mbean for the given pool on the given MBeanServer
   * under the given domain name 
   *
   * @param pool         the pool to register 
   * @param domain       the domain name to use
    * @param mbeanServer  the mbean server to use 
   * @throws JMException  if an jmx exception occurs 
   */
  @SuppressWarnings("unchecked")
  public static ObjectName createAndRegister(IConnectionPool pool, String domain, MBeanServer mbeanServer) throws JMException {
    ObjectName objectName = new ObjectName(domain + ":type=" + pool.getClass().getSimpleName() + ",name=" + pool.hashCode());
    ManagementFactory.getPlatformMBeanServer().registerMBean(new IntrospectionBasedDynamicMBean(pool), objectName);
    
    new ResourcePoolListener(pool, domain);
    
    return objectName;
  }
  


  @SuppressWarnings("unchecked")
  private static void unregister(IConnectionPool pool, String domain) throws JMException {
    ObjectName objectName = new ObjectName(domain + ":type=" + pool.getClass().getSimpleName() + ",name=" + pool.hashCode());
    ManagementFactory.getPlatformMBeanServer().unregisterMBean(objectName);
  }
  

  
  private static final class ResourcePoolListener implements ILifeCycle {
    
    private static final Logger LOG = Logger.getLogger(ResourcePoolListener.class.getName());
    
    @SuppressWarnings("unchecked")
    private IConnectionPool pool = null;
    private String domain = null;
    
    @SuppressWarnings("unchecked")
    ResourcePoolListener(IConnectionPool pool, String domain) {
      this.pool = pool;
      this.domain = domain;
      
      pool.addListener(this);
    }
    
    public void onInit() {
    }
    
    public void onDestroy() {
      try {
        unregister(pool, domain);
      } catch (Exception ex) { 
        if (LOG.isLoggable(Level.FINE)) {
          LOG.fine("error occured by deregistering the pool (domain=" + domain + "). reason: " + ex.toString());
        }
      } 
    }
  }
}