[jBoss-Dev] CVS update: admin/src/org/jboss/admin/beansSystemMonitorBean.java

[jBoss CVS Development]

  User: juha    
  Date: 01/03/07 14:55:09

  Added:       src/org/jboss/admin/beans SystemMonitorBean.java
  Log:
  the EJB for the admin model...
  
  Revision  Changes    Path
  1.1                  admin/src/org/jboss/admin/beans/SystemMonitorBean.java
  
  Index: SystemMonitorBean.java
  ===================================================================
  /*
   * Class SystemMonitorBean
   * Copyright (C) 2001  Juha Lindfors
   *
   * This library is free software; you can redistribute it and/or
   * modify it under the terms of the GNU Library General Public
   * License as published by the Free Software Foundation; either
   * version 2 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
   * Library General Public License for more details.
   *
   * You should have received a copy of the GNU Library 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.
   *
   * This package and its source code is available at www.jboss.org
   * $Id: SystemMonitorBean.java,v 1.1 2001/03/07 22:55:09 juha Exp $
   */     
  package org.jboss.admin.beans;
  
  // standard imports
  import java.util.ArrayList;
  import java.util.Iterator;
  import java.util.NoSuchElementException;
  
  import javax.ejb.SessionBean;
  import javax.ejb.SessionContext;
  import javax.ejb.EJBException;
  import javax.ejb.CreateException;
  import javax.management.MBeanServer;
  import javax.management.MBeanServerFactory;
  import javax.management.MalformedObjectNameException;
  
  // non-standard class dependencies
  import org.jboss.util.MBeanProxy;
  import org.jboss.admin.mbean.SystemMonitorMBean;
  
  
  /**
   * ...
   *
   * @ejb-name SystemMonitor
   * @stateful-session
   *
   * @jndi-name admin/SystemMonitor
   *
   * @author  <a href="mailto:[EMAIL PROTECTED]">Juha Lindfors</a>
   * @version $Revision: 1.1 $
   */        
  public class SystemMonitorBean implements SessionBean {
  
      // serializable fields (for passivation)
      private SessionContext ctx  = null;
      private String agentID      = null;
      
      // Proxy instance implementing the MBean interface
      private SystemMonitorMBean monitor = null;
      
  /*
   *************************************************************************
   *
   *      PUBLIC INSTANCE METHODS
   *
   *************************************************************************
   */     
   
      /**
       * @create-method
       */
      public void ejbCreate() throws CreateException {
          try {
              monitor = (SystemMonitorMBean)MBeanProxy.create(
                              SystemMonitorMBean.class,
                              SystemMonitorMBean.OBJECT_NAME
                        );                                     
          }
          catch (MalformedObjectNameException e) {
              // Means we couldn't find the mbean we needed.
              throw new CreateException("Unable to locate MBean " + 
SystemMonitorMBean.OBJECT_NAME);
          }
          catch (Exception e) {
              throw new CreateException(e.getMessage());
          }
      }
  
      /**
       * @create-method
       */
      public void ejbCreate(String agentID) throws CreateException {
          throw new CreateException("Not Yet Implemented");
          
          // This constructor is required for the monitoring of system
          // resources in a cluster node. In a clustered environment we need
          // to specify the node this client session is monitoring (via AgentID?)
          // and find the correct MBeanServer instance. This will require changes
          // in the MBeanProxy implementation which currently looks for the first
          // MBeanServer instance in the same JVM.
          //                                                                 [JPL]
          
  /*        
          this.agentID = agentID;
          mbeanServer = findMBeanServer(agentID);
  */
      }
      
      /**
       *
       * @remote-method
       */
      public boolean isMemoryMonitorEnabled() {
          return monitor.isMemoryMonitorEnabled();
      }
      
      /**
       *
       * @remote-method
       */
      public boolean isThreadMonitorEnabled() {
          return monitor.isThreadMonitorEnabled();
      }
      
      /**
       *
       * @remote-method
       */
      public void setMemoryMonitorEnabled(boolean b) {
          monitor.setMemoryMonitorEnabled(b);
      }
      
      /**
       *
       * @remote-method
       */
      public void setThreadMonitorEnabled(boolean b) {
          monitor.setThreadMonitorEnabled(b);
      }
      
  /*
   *************************************************************************
   *
   *      IMPLEMENTS  SESSION_BEAN  INTERFACE
   *
   *************************************************************************
   */ 
  
      /**
       * Stores the session context upon creation.
       *
       * @param   ctx     session context object
       */
      public void setSessionContext(SessionContext ctx) {
          this.ctx = ctx;    
      }
      
      public void ejbActivate()  { }
  
  
      public void ejbPassivate() { }
      
      public void ejbRemove() { }
      
  /*
   *************************************************************************
   *
   *      PRIVATE INSTANCE METHODS
   *
   *************************************************************************
   */ 
      
      /**
       *
       * @throws EJBExcetption
       */
      private MBeanServer findMBeanServer(String agentID) {
          try {
              ArrayList list = MBeanServerFactory.findMBeanServer(agentID);
              return ((MBeanServer)list.iterator().next());
          }
          catch (NoSuchElementException e) {
              // This occurs if no MBeanServer instance is found in the JVM.
              // We'll throw an EJBException and tell the container it's
              // free to discard this bean instance.
              throw new EJBException("Unable to find an MBeanServer");
          }
      }
  }