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package org.glassfish.admin.mejb;
import java.lang.management.ManagementFactory;
import java.net.InetAddress;
import java.net.UnknownHostException;
import javax.rmi.PortableRemoteObject;
import java.rmi.RemoteException;
import javax.management.InstanceNotFoundException;
import javax.management.ListenerNotFoundException;
import javax.management.MBeanServer;
import javax.management.NotificationFilter;
import javax.management.NotificationListener;
import javax.management.ObjectName;
import javax.management.j2ee.ListenerRegistration;
import javax.management.j2ee.ManagementHome;
import javax.management.j2ee.Management;
import javax.naming.Context;
import javax.naming.InitialContext;
/**
*/
public final class MEJBUtility {
private final MBeanServer mServer;
private final ListenerRegistry listenerRegistry;
private Management mMEJB;
private static final MEJBUtility INSTANCE = new MEJBUtility();
private MEJBUtility() {
mServer = ManagementFactory.getPlatformMBeanServer();
listenerRegistry = _getListenerRegistry();
}
public static MEJBUtility getInstance() {
return INSTANCE;
}
public static final String MEJB_NAME_PROP = "mejb.name";
public static final String MEJB_DEFAULT_NAME = "ejb/mgmt/MEJB";
public synchronized Management getMEJB() throws RemoteException {
if (mMEJB == null) {
try {
final Context ic = new InitialContext();
final String ejbName = System.getProperty( MEJB_NAME_PROP, MEJB_DEFAULT_NAME);
final Object objref = ic.lookup(ejbName);
final ManagementHome home = (ManagementHome) PortableRemoteObject.narrow(objref, ManagementHome.class);
mMEJB = (Management) home.create();
} catch (Exception ex) {
ex.printStackTrace();
}
}
return mMEJB;
}
public MBeanServer getMBeanServer()
{
return mServer;
}
public ListenerRegistration getListenerRegistry()
{
return listenerRegistry;
}
private static ListenerRegistry _getListenerRegistry() {
ListenerRegistry reg = null;
try {
reg = new ListenerRegistry( InetAddress.getLocalHost().getHostAddress());
} catch ( final UnknownHostException e) {
reg = new ListenerRegistry( MEJBUtility.class.getName() );
}
return reg;
}
public void addNotificationListener( final ObjectName name, NotificationListener listener, NotificationFilter filter, Object handback)
throws InstanceNotFoundException, RemoteException {
if ( ! mServer.isRegistered(name) )
{
System.out.println( "addNotificationListener: NOT REGISTERED: " + name );
}
else
{
System.out.println( "addNotificationListener: REGISTERED: " + name );
}
mServer.addNotificationListener(name, listener, filter, handback);
}
public void removeNotificationListener( final ObjectName name, NotificationListener listener)
throws InstanceNotFoundException, ListenerNotFoundException, RemoteException {
mServer.removeNotificationListener(name, listener);
}
}