/*
 * JBoss, the OpenSource J2EE webOS
 *
 * Distributable under LGPL license.
 * See terms of license at gnu.org.
 */

// $Id: JMXEngineConfigurationFactory.java,v 1.2.2.2 2004/08/08 21:27:39 tdiesler Exp $

package org.jboss.net.axis.server;

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

import org.apache.axis.EngineConfiguration;
import org.apache.axis.EngineConfigurationFactory;
import org.jboss.mx.util.MBeanServerLocator;

/**
 * <p> A configuration factory that accesses axis server engines 
 * via JMX attribute access. </p>
 * @author jung
 * @version $Revision: 1.2.2.2 $
 * @since 9.9.2002
 */

public class JMXEngineConfigurationFactory
   implements EngineConfigurationFactory
{

   //
   // Attributes
   //

   protected ObjectName objectName;
   protected MBeanServer server;

   //
   // Constructors
   //

   /** construct a new factory tied to a particular engine provider mbean */

   protected JMXEngineConfigurationFactory(String name)
      throws MalformedObjectNameException
   {
      server = MBeanServerLocator.locateJBoss();
      this.objectName = new ObjectName(name);
   }

   //
   // Protected Helpers
   //

   /**
    * find attribute through JMX server and mbean
    */

   protected Object getAttribute(String attributeName)
   {
      try
      {
         return server.getAttribute(objectName, attributeName);
      }
      catch (JMException e)
      {
         return null;
      }
   }

   //
   // Public API
   //

   /** return axis server associated with mbean */
   public AxisServer getAxisServer()
   {
      return (AxisServer) getAttribute("AxisServer");
   }

   /* (non-Javadoc)
      * @see org.apache.axis.EngineConfigurationFactory#getClientEngineConfig()
      */
   public EngineConfiguration getClientEngineConfig()
   {
      return (EngineConfiguration) getAttribute("ClientEngineConfiguration");
   }

   /* (non-Javadoc)
      * @see org.apache.axis.EngineConfigurationFactory#getServerEngineConfig()
      */
   public EngineConfiguration getServerEngineConfig()
   {
      return (EngineConfiguration) getAttribute("ServerEngineConfiguration");
   }

   /**
    * static method to create a new jmx factory
    * @param param objectname of the server mbean
    * @return a new factory bound to that mbean, if it exists
    */
   public static JMXEngineConfigurationFactory newJMXFactory(String param)
   {
      try
      {
         return new JMXEngineConfigurationFactory((String) param);
      }
      catch (MalformedObjectNameException e)
      {
         return null;
      }
   }

   /**
    * static method to create a new factory along the Axis spec
    * @param param specification of the configuration
    * @return new factory, if the param represents an mbean object name
    */

   public static EngineConfigurationFactory newFactory(Object param)
   {
      if (param instanceof String)
      {
         return newJMXFactory((String) param);
      }
      else
      {
         return null;
      }
   }

}
