/*
 * JBoss, the OpenSource J2EE webOS
 *
 * Distributable under LGPL license.
 * See terms of license at gnu.org.
 */
package org.jboss.management.j2ee;

import org.jboss.management.j2ee.statistics.JVMStatsImpl;

import javax.management.MalformedObjectNameException;
import javax.management.ObjectName;
import javax.management.j2ee.statistics.Stats;
import java.util.Hashtable;

/**
 * The JBoss JSR-77.3.4 JVM model implementation
 *
 * @author <a href="mailto:andreas@jboss.org">Andreas Schaefer</a>.
 * @author Scott.Stark@jboss.org
 * @author thomas.diesler@jboss.org
 * @version $Revision: 1.8 $
 * @jmx:mbean extends="org.jboss.management.j2ee.J2EEManagedObjectMBean,org.jboss.management.j2ee.statistics.StatisticsProvider"
 */
public class JVM
        extends J2EEManagedObject
        implements JVMMBean
{
   // Constants -----------------------------------------------------

   // Attributes ----------------------------------------------------

   private String javaVendor;
   private String javaVersion;
   private String node;
   private JVMStatsImpl stats;

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

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

   /**
    */
   public JVM(String name, ObjectName j2eeServer, String javaVersion,
              String javaVendor, String node)
           throws MalformedObjectNameException,
           InvalidParentException
   {
      super(J2EETypeConstants.JVM, name, j2eeServer);
      this.javaVendor = javaVendor;
      this.javaVersion = javaVersion;
      this.node = node;
      this.stats = new JVMStatsImpl();
   }

   // Public --------------------------------------------------------

   /**
    * @jmx:managed-attribute
    */
   public String getjavaVendor()
   {
      return javaVendor;
   }

   /**
    * @jmx:managed-attribute
    */
   public String getjavaVersion()
   {
      return javaVersion;
   }

   /**
    * @jmx:managed-attribute
    */
   public String getnode()
   {
      return node;
   }

   // Begin StatisticsProvider interface methods
   /**
    * Obtain the Stats from the StatisticsProvider
    *
    * @return
    * @jmx:managed-attribute
    */
   public Stats getstats()
   {
      // Refresh the stats
      stats.getUpTime();
      stats.getHeapSize();
      return stats;
   }

   /**
    * Reset all statistics in the StatisticsProvider
    *
    * @jmx:managed-operation
    */
   public void resetStats()
   {
      stats.reset();
   }
   // End StatisticsProvider interface methods

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

   public String toString()
   {
      StringBuffer tmp = new StringBuffer("JVM");
      tmp.append('[');
      tmp.append("JavaVendor: ");
      tmp.append(javaVendor);
      tmp.append(", JavaVersion: ");
      tmp.append(javaVersion);
      tmp.append(", JavaVersion: ");
      tmp.append(javaVendor);
      tmp.append(", Stats: ");
      tmp.append(stats);
      tmp.append(']');
      return tmp.toString();
   }

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

   /**
    * @return A hashtable with the J2EE Server as parent
    */
   protected Hashtable getParentKeys(ObjectName pParent)
   {
      Hashtable lReturn = new Hashtable();
      Hashtable lProperties = pParent.getKeyPropertyList();
      lReturn.put(J2EETypeConstants.J2EEServer, lProperties.get("name"));

      return lReturn;
   }

}