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

package org.jboss.management.j2ee;

import org.jboss.logging.Logger;

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

/**
 * Root class of the JBoss JSR-77 implementation of
 * {@link javax.management.j2ee.URLResource URLResource}.
 *
 * @author <a href="mailto:andreas@jboss.org">Andreas Schaefer</a>.
 * @version $Revision: 1.10 $
 * @jmx:mbean extends="org.jboss.management.j2ee.StateManageable,org.jboss.management.j2ee.J2EEManagedObjectMBean"
 */
public class URLResource
        extends J2EEResource
        implements URLResourceMBean
{
   // Constants -----------------------------------------------------

   // Attributes ----------------------------------------------------
   private static Logger log = Logger.getLogger(URLResource.class);

   private StateManagement mState;
   private ObjectName mService;

   // Static --------------------------------------------------------

   public static ObjectName create(MBeanServer pServer, String pName, ObjectName pService)
   {
      ObjectName lServer = null;
      try
      {
         lServer = (ObjectName) pServer.queryNames(new ObjectName(J2EEDomain.getDomainName() + ":" +
                 J2EEManagedObject.TYPE + "=" + J2EETypeConstants.J2EEServer + "," +
                 "*"),
                 null).iterator().next();
      }
      catch (Exception e)
      {
         log.error("Could not create JSR-77 URLResource: " + pName, e);
         return null;
      }
      try
      {
         // Now create the URLResource Representant
         return pServer.createMBean("org.jboss.management.j2ee.URLResource",
                 null,
                 new Object[]{
                    pName,
                    lServer,
                    pService
                 },
                 new String[]{
                    String.class.getName(),
                    ObjectName.class.getName(),
                    ObjectName.class.getName()
                 }).getObjectName();
      }
      catch (Exception e)
      {
         log.error("Could not create JSR-77 URLResource: " + pName, e);
         return null;
      }
   }

   public static void destroy(MBeanServer pServer, String pName)
   {
      try
      {
         J2EEManagedObject.removeObject(pServer,
                 J2EEDomain.getDomainName() + ":" +
                 J2EEManagedObject.TYPE + "=" + J2EETypeConstants.URLResource + "," +
                 "name=" + pName + "," +
                 "*");
      }
      catch (Exception e)
      {
         log.error("Could not destroy JSR-77 URLResource: " + pName, e);
      }
   }

   // Constructors --------------------------------------------------

   /**
    * @param pName Name of the URLResource
    * @throws InvalidParameterException If list of nodes or ports was null or empty
    */
   public URLResource(String pName, ObjectName pServer, ObjectName pService)
           throws
           MalformedObjectNameException,
           InvalidParentException
   {
      super(J2EETypeConstants.URLResource, pName, pServer);
      if (log.isDebugEnabled())
         log.debug("Service name: " + pService);
      mService = pService;
      mState = new StateManagement(this);
   }

   // javax.managment.j2ee.EventProvider implementation -------------

   public String[] getEventTypes()
   {
      return StateManagement.stateTypes;
   }

   public String getEventType(int pIndex)
   {
      if (pIndex >= 0 && pIndex < StateManagement.stateTypes.length)
      {
         return StateManagement.stateTypes[pIndex];
      }
      else
      {
         return null;
      }
   }

   // javax.management.j2ee.StateManageable implementation ----------

   public long getStartTime()
   {
      return mState.getStartTime();
   }

   public int getState()
   {
      return mState.getState();
   }

   public void mejbStart()
   {
      try
      {
         server.invoke(mService,
                 "start",
                 new Object[]{},
                 new String[]{});
      }
      catch (Exception e)
      {
         log.error("Start of URL Resource failed", e);
      }
   }

   public void mejbStartRecursive()
   {
      // No recursive start here
      mejbStart();
   }

   public void mejbStop()
   {
      try
      {
         server.invoke(mService,
                 "stop",
                 new Object[]{},
                 new String[]{});
      }
      catch (Exception e)
      {
         log.error("Stop of URL Resource failed", e);
      }
   }

   public void postCreation()
   {
      try
      {
         server.addNotificationListener(mService, mState, null, null);
      }
      catch (JMException e)
      {
         log.debug("Failed to add notification listener", e);
      }
      sendNotification(NotificationConstants.OBJECT_CREATED, "URL Resource created");
   }

   public void preDestruction()
   {
      sendNotification(NotificationConstants.OBJECT_DELETED, "URL Resource deleted");
      // Remove the listener of the target MBean
      try
      {
         server.removeNotificationListener(mService, mState);
      }
      catch (JMException jme)
      {
         // When the service is not available anymore then just ignore the exception
      }
   }

   // java.lang.Object overrides ------------------------------------

   public String toString()
   {
      return "URLResource { " + super.toString() + " } [ " +
              " ]";
   }

   // Package protected ---------------------------------------------

   // Protected -----------------------------------------------------

   // Private -------------------------------------------------------

   // Inner classes -------------------------------------------------
}