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package org.glassfish.admin.mejb;
import java.rmi.Naming;
import java.rmi.RemoteException;
import java.rmi.registry.Registry;
import java.rmi.registry.LocateRegistry;
import java.rmi.server.UnicastRemoteObject;
import java.util.Hashtable;
import javax.management.ListenerNotFoundException;
import javax.management.Notification;
import javax.management.NotificationListener;
/**
* The EventListenerProxy recieves notifications from RemoteListenerConnectors
* registered on the server managed objects and forwards them to the corresponding
* local listeners
*
* @author Hans Hrasna
*/
public class EventListenerProxy extends UnicastRemoteObject implements RemoteEventListener {
private Hashtable listenerTable = new Hashtable();
private Hashtable handbackTable = new Hashtable();
private String proxyAddress;
private static EventListenerProxy eventProxy = null;
private static int portnum=1100;
private String rmiName;
private static boolean debug = false;
public synchronized static EventListenerProxy getEventListenerProxy() {
if (eventProxy == null) {
EventListenerProxy newProxy = null;
try {
newProxy = new EventListenerProxy();
Naming.rebind(newProxy.proxyAddress, newProxy);
eventProxy = newProxy;
if(debug) System.out.println(eventProxy.rmiName + " bound to existing registry at port " + portnum );
} catch (RemoteException re) {
if(debug) System.out.println("Naming.rebind("+ (newProxy != null ? newProxy.proxyAddress : "null") +", eventProxy): " + re);
try {
newProxy = new EventListenerProxy();
Registry r = LocateRegistry.createRegistry(portnum);
r.bind(newProxy.rmiName, newProxy);
eventProxy = newProxy;
if(debug) System.out.println(newProxy.rmiName + " bound to newly created registry at port " + portnum );
} catch(Exception e) {
eventProxy = null;
if(debug) e.printStackTrace();
}
} catch (Exception e) {
if(debug) e.printStackTrace();
}
}
return eventProxy;
}
public EventListenerProxy() throws java.rmi.RemoteException {
String hostName;
rmiName = "RemoteEventListener" + hashCode() + System.currentTimeMillis();
try {
hostName = java.net.InetAddress.getLocalHost().getHostAddress();
} catch (java.net.UnknownHostException e) {
hostName = "localhost";
System.out.println(e);
}
proxyAddress = "//"+ hostName + ":" + portnum + "/" + rmiName;
}
public void handleNotification(Notification n, Object h) throws RemoteException {
if (debug) System.out.println("EventListenerProxy:handleNotification(" + n + ")");
NotificationListener listener = (NotificationListener)listenerTable.get((String)h);
if (listener != null) {
Object handback = handbackTable.get((String)h);
listener.handleNotification(n,handback);
} else {
System.out.println("EventListenerProxy: listener id " + h + " not found");
}
}
public String getProxyAddress() {
return proxyAddress;
}
public void addListener(String id, NotificationListener l, Object handback) {
if (debug) System.out.println("EventListenerProxy.addListener()");
listenerTable.put(id, l);
handbackTable.put(id, handback);
}
public void removeListener(String id) throws ListenerNotFoundException {
if(listenerTable.remove(id) == null) {
throw new ListenerNotFoundException();
} else {
handbackTable.remove(id);
}
}
}