0 Replies Latest reply on Feb 19, 2008 10:42 AM by Ovidiu Stanciu

    Error when conecting with a remote object from MBean

    Ovidiu Stanciu Newbie

      Hello.

      I have a remote server and a client in the form of an MBean, designed following the Serialization Server example from JBoss Remoting.

      The Server

      import javax.management.MBeanServer;
      
      import org.jboss.remoting.InvocationRequest;
      import org.jboss.remoting.InvokerLocator;
      import org.jboss.remoting.ServerInvocationHandler;
      import org.jboss.remoting.ServerInvoker;
      import org.jboss.remoting.callback.InvokerCallbackHandler;
      import org.jboss.remoting.transport.Connector;
      
      import ro.ebsoft.doorcontrol.comm.common.CommModuleMain;
      import ro.ebsoft.doorcontrol.interfaces.CommModule;
      
      public class Main {
      
       private static String transport = "rmi";
       private static String host = "localhost";
       private static int port = 5400;
      
       private static CommModule response;
      
       public void setupServer(String locatorURI) throws Exception {
       InvokerLocator locator = new InvokerLocator(locatorURI);
       System.out.println("Starting remoting server with locator URI of: "
       + locatorURI);
       Connector connector = new Connector(locator);
      
       connector.create();
      
       SampleInvocationHandler invocationHandler = new SampleInvocationHandler();
       connector.addInvocationHandler("CommModule", invocationHandler);
      
       connector.start();
       }
      
       // rmi server main class
       public static void main(String args[]) {
      
       String locatorURI = transport + "://" + host + ":" + port
       + "/?serializationtype=jboss";
       Main main = new Main();
      
       try {
       response = new CommModuleMain();
       main.setupServer(locatorURI);
       while (true) {
       Thread.sleep(1000);
       }
       } catch (Exception e) {
       e.printStackTrace();
       }
       }
      
       public static class SampleInvocationHandler implements
       ServerInvocationHandler {
      
       @Override
       public void addListener(InvokerCallbackHandler arg0) {
       }
      
       @Override
       public Object invoke(InvocationRequest invocation) throws Throwable {
       System.out.println("Invocation request is "
       + invocation.getParameter());
      
       return new CommModuleMain();
       }
      
       @Override
       public void removeListener(InvokerCallbackHandler arg0) {
       }
      
       @Override
       public void setInvoker(ServerInvoker arg0) {
       }
      
       @Override
       public void setMBeanServer(MBeanServer arg0) {
       }
      
       }
      }
      


      The MBean class
      package ro.ebsoft.doorcontrol.mbean.engine;
      
      import org.jboss.remoting.Client;
      import org.jboss.remoting.InvokerLocator;
      import org.jboss.system.ServiceMBeanSupport;
      
      import interfaces.CommModule;
      
      public class CommEngine extends ServiceMBeanSupport implements CommEngineMBean {
      
       private static String transport = "rmi";
       private static String host = "localhost";
       private static int port = 5400;
      
       public String getMessage() {
       return message;
       }
      
       public void setMessage(String message) {
       this.message = message;
       }
      
       public void printMessage(){
       log.info(message);
       }
      
       protected void startService() throws Exception{
       log.info("Starting CommModuleMBean");
       String locatorURI = transport + "://" + host + ":" + port + "/?serializationtype=jboss";
       log.info("Connecting to " + locatorURI);
       //String locatorURI = transport + "://" + host + ":" + port;
      
       InvokerLocator locator = new InvokerLocator(locatorURI);
       Client remotingClient = new Client(locator);
       remotingClient.connect();
      
       try{
       CommModule cm = (CommModule)remotingClient.invoke("CommModule");
       }
       catch(Throwable t){
       t.printStackTrace();
       }
       }
      
       protected void stopService() throws Exception{
       log.info("Stopping with message: " + message);
       }
      
       //setters & getters
      }
      


      When I run both the server and a similar client (which is not an MBean), all goes well. But when I deploy my client as a .sar in the app server, I get
       ERROR [MainDeployer] Could not create deployment: file:/opt/jboss-4.2.2.GA/server/default/deploy/commengine.sar
      org.jboss.deployment.DeploymentException: - nested throwable: (java.lang.reflect.UndeclaredThrowableException)
       at org.jboss.system.ServiceConfigurator.install(ServiceConfigurator.java:196)
       at org.jboss.system.ServiceController.install(ServiceController.java:226)
       at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
       at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
       at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
       at java.lang.reflect.Method.invoke(Method.java:585)
       at org.jboss.mx.interceptor.ReflectedDispatcher.invoke(ReflectedDispatcher.java:155)
       at org.jboss.mx.server.Invocation.dispatch(Invocation.java:94)
       at org.jboss.mx.server.Invocation.invoke(Invocation.java:86)
       at org.jboss.mx.server.AbstractMBeanInvoker.invoke(AbstractMBeanInvoker.java:264)
       at org.jboss.mx.server.MBeanServerImpl.invoke(MBeanServerImpl.java:659)
       at org.jboss.mx.util.MBeanProxyExt.invoke(MBeanProxyExt.java:210)
       at $Proxy4.install(Unknown Source)
       at org.jboss.deployment.SARDeployer.create(SARDeployer.java:249)
       at org.jboss.deployment.MainDeployer.create(MainDeployer.java:969)
       at org.jboss.deployment.MainDeployer.deploy(MainDeployer.java:818)
       at org.jboss.deployment.MainDeployer.deploy(MainDeployer.java:782)
       at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
       at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
       at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
       at java.lang.reflect.Method.invoke(Method.java:585)
       at org.jboss.mx.interceptor.ReflectedDispatcher.invoke(ReflectedDispatcher.java:155)
       at org.jboss.mx.server.Invocation.dispatch(Invocation.java:94)
       at org.jboss.mx.interceptor.AbstractInterceptor.invoke(AbstractInterceptor.java:133)
       at org.jboss.mx.server.Invocation.invoke(Invocation.java:88)
       at org.jboss.mx.interceptor.ModelMBeanOperationInterceptor.invoke(ModelMBeanOperationInterceptor.java:142)
       at org.jboss.mx.server.Invocation.invoke(Invocation.java:88)
       at org.jboss.mx.server.AbstractMBeanInvoker.invoke(AbstractMBeanInvoker.java:264)
       at org.jboss.mx.server.MBeanServerImpl.invoke(MBeanServerImpl.java:659)
       at org.jboss.mx.util.MBeanProxyExt.invoke(MBeanProxyExt.java:210)
       at $Proxy9.deploy(Unknown Source)
       at org.jboss.deployment.scanner.URLDeploymentScanner.deploy(URLDeploymentScanner.java:421)
       at org.jboss.deployment.scanner.URLDeploymentScanner.scan(URLDeploymentScanner.java:634)
       at org.jboss.deployment.scanner.AbstractDeploymentScanner$ScannerThread.doScan(AbstractDeploymentScanner.java:263)
       at org.jboss.deployment.scanner.AbstractDeploymentScanner.startService(AbstractDeploymentScanner.java:336)
       at org.jboss.system.ServiceMBeanSupport.jbossInternalStart(ServiceMBeanSupport.java:289)
       at org.jboss.system.ServiceMBeanSupport.jbossInternalLifecycle(ServiceMBeanSupport.java:245)
       at sun.reflect.GeneratedMethodAccessor3.invoke(Unknown Source)
       at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
       at java.lang.reflect.Method.invoke(Method.java:585)
       at org.jboss.mx.interceptor.ReflectedDispatcher.invoke(ReflectedDispatcher.java:155)
       at org.jboss.mx.server.Invocation.dispatch(Invocation.java:94)
       at org.jboss.mx.server.Invocation.invoke(Invocation.java:86)
       at org.jboss.mx.server.AbstractMBeanInvoker.invoke(AbstractMBeanInvoker.java:264)
       at org.jboss.mx.server.MBeanServerImpl.invoke(MBeanServerImpl.java:659)
       at org.jboss.system.ServiceController$ServiceProxy.invoke(ServiceController.java:978)
       at $Proxy0.start(Unknown Source)
       at org.jboss.system.ServiceController.start(ServiceController.java:417)
       at sun.reflect.GeneratedMethodAccessor9.invoke(Unknown Source)
       at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
       at java.lang.reflect.Method.invoke(Method.java:585)
       at org.jboss.mx.interceptor.ReflectedDispatcher.invoke(ReflectedDispatcher.java:155)
       at org.jboss.mx.server.Invocation.dispatch(Invocation.java:94)
       at org.jboss.mx.server.Invocation.invoke(Invocation.java:86)
       at org.jboss.mx.server.AbstractMBeanInvoker.invoke(AbstractMBeanInvoker.java:264)
       at org.jboss.mx.server.MBeanServerImpl.invoke(MBeanServerImpl.java:659)
       at org.jboss.mx.util.MBeanProxyExt.invoke(MBeanProxyExt.java:210)
       at $Proxy4.start(Unknown Source)
       at org.jboss.deployment.SARDeployer.start(SARDeployer.java:302)
       at org.jboss.deployment.MainDeployer.start(MainDeployer.java:1025)
       at org.jboss.deployment.MainDeployer.deploy(MainDeployer.java:819)
       at org.jboss.deployment.MainDeployer.deploy(MainDeployer.java:782)
       at org.jboss.deployment.MainDeployer.deploy(MainDeployer.java:766)
       at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
       at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
       at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
       at java.lang.reflect.Method.invoke(Method.java:585)
       at org.jboss.mx.interceptor.ReflectedDispatcher.invoke(ReflectedDispatcher.java:155)
       at org.jboss.mx.server.Invocation.dispatch(Invocation.java:94)
       at org.jboss.mx.interceptor.AbstractInterceptor.invoke(AbstractInterceptor.java:133)
       at org.jboss.mx.server.Invocation.invoke(Invocation.java:88)
       at org.jboss.mx.interceptor.ModelMBeanOperationInterceptor.invoke(ModelMBeanOperationInterceptor.java:142)
       at org.jboss.mx.server.Invocation.invoke(Invocation.java:88)
       at org.jboss.mx.server.AbstractMBeanInvoker.invoke(AbstractMBeanInvoker.java:264)
       at org.jboss.mx.server.MBeanServerImpl.invoke(MBeanServerImpl.java:659)
       at org.jboss.mx.util.MBeanProxyExt.invoke(MBeanProxyExt.java:210)
       at $Proxy5.deploy(Unknown Source)
       at org.jboss.system.server.ServerImpl.doStart(ServerImpl.java:482)
       at org.jboss.system.server.ServerImpl.start(ServerImpl.java:362)
       at org.jboss.Main.boot(Main.java:200)
       at org.jboss.Main$1.run(Main.java:508)
       at java.lang.Thread.run(Thread.java:595)
      Caused by: java.lang.reflect.UndeclaredThrowableException
       at org.jboss.system.ServiceCreator.install(ServiceCreator.java:236)
       at org.jboss.system.ServiceConfigurator.internalInstall(ServiceConfigurator.java:451)
       at org.jboss.system.ServiceConfigurator.install(ServiceConfigurator.java:171)
       ... 81 more
      Caused by: java.lang.NoClassDefFoundError: interfaces/CommModule
       at java.lang.Class.getDeclaredConstructors0(Native Method)
       at java.lang.Class.privateGetDeclaredConstructors(Class.java:2357)
       at java.lang.Class.getConstructor0(Class.java:2671)
       at java.lang.Class.getConstructor(Class.java:1629)
       at org.jboss.mx.server.MBeanServerImpl.instantiate(MBeanServerImpl.java:1232)
       at org.jboss.mx.server.MBeanServerImpl.instantiate(MBeanServerImpl.java:286)
       at org.jboss.mx.server.MBeanServerImpl.createMBean(MBeanServerImpl.java:344)
       at org.jboss.system.ServiceCreator.install(ServiceCreator.java:157)
       ... 83 more
      


      I have included a .jar which contains interfaces.CommModule in the MBean .sar.

      If I change the server to return. say, a String rather than a CommModule, all goes well, the MBean deploys and works as expected (obtains the string by invoking the remote server).

      All I want to do is to obtain a remote instance of a CommModule when the app server starts.

      Could someone explain what am I doing wrong? Or a better idea (any idea) of doing this?

      Thank you for your time.