[jboss-dev-forums] [Design of Clustering on JBoss (Clusters/JBoss)] - Re: Another way to write clustered singletons

[sebastianlacuesta]

Excellent. I want to call a method of a singleton service. I tried using an RMIAdaptor this way:

  | public void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
  | 	PrintWriter out = response.getWriter();
  | 	String numero = request.getParameter("numero");
  | 	String mensaje = request.getParameter("mensaje");
  | 	try {
  | 		Context context = new InitialContext();
  | 		RMIAdaptor rmiAdaptor = (RMIAdaptor)context.lookup("jmx/rmi/RMIAdaptor");
  | 		if ((rmiAdaptor != null) && (rmiAdaptor.isRegistered(new ObjectName("poksmedia.mbean:service=MBloxService")))) {
  | 			rmiAdaptor.invoke(new ObjectName("poksmedia.mbean:service=MBloxService"), "sendMessage", new Object[]{numero, mensaje}, new String[]{"java.lang.String", "java.lang.String"});
  | 			out.print("El mensaje se envió correctamente (creo).");
  | 		}
  | 	} catch (NamingException e) {
  | 		// TODO Auto-generated catch block
  | 		e.printStackTrace();
  | 	} catch (MalformedObjectNameException e) {
  | 		// TODO Auto-generated catch block
  | 		e.printStackTrace();
  | 	} catch (NullPointerException e) {
  | 		// TODO Auto-generated catch block
  | 		e.printStackTrace();
  | 	} catch (InstanceNotFoundException e) {
  | 		// TODO Auto-generated catch block
  | 		e.printStackTrace();
  | 	} catch (MBeanException e) {
  | 		// TODO Auto-generated catch block
  | 		e.printStackTrace();
  | 	} catch (ReflectionException e) {
  | 		// TODO Auto-generated catch block
  | 		e.printStackTrace();
  | 	}
  | }
  | 
This works awesome in the same node where the service is running. But not in the others. It throws a javax.management.RuntimeMBeanException
.
Any ideas?

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