2 Replies Latest reply on Nov 18, 2009 4:25 AM by sdsd sdasd

    tuning ejb3 calling

    sdsd sdasd Newbie

      hi ,

      i got in project i call the ejb this way

      
       Properties props = new Properties();
       props.setProperty("java.naming.factory.initial","org.jnp.interfaces.NamingContextFactory");
       props.setProperty("java.naming.provider.url", "jnp://192.168.0.10:1099");
       props.setProperty("java.naming.factory.url.pkgs", "org.jboss.naming");
       props.setProperty("jnp.socket.Factory", "org.jnp.interfaces.TimedSocketFactory");
       Context context = new InitialContext(props);
      
       TraxManager TraxManager = (TraxManager)context.lookup("TraxService/remote");
      


      the problem is that i got this line:

       TraxManager TraxManager = (TraxManager)context.lookup("TraxService/remote");
      


      instanciated in each of my managed bean .... (i'm using jsf) , it's not optimal like solution

      so i have created a generic class :


      package com.voipover.utils;
      
      import java.util.Properties;
      
      import javax.naming.Context;
      import javax.naming.InitialContext;
      import javax.naming.NamingException;
      
      public class EJBHomeFactory {
      
      
      
       public static Object lookup(String jndiName) {
       Context context = null;
       try {
       Properties props = new Properties();
       props.setProperty("java.naming.factory.initial","org.jnp.interfaces.NamingContextFactory");
       props.setProperty("java.naming.provider.url", "jnp://192.168.0.10:1099");
       props.setProperty("java.naming.factory.url.pkgs", "org.jboss.naming");
       props.setProperty("jnp.socket.Factory", "org.jnp.interfaces.TimedSocketFactory");
       context = new InitialContext(props);
       //context = new InitialContext();
       return context.lookup(jndiName);
       } catch (NamingException ex) {
       throw new IllegalStateException("Cannot connect to bean: " + jndiName + " Reason: " + ex, ex.getCause());
       } finally {
       try {
       context.close();
       } catch (NamingException ex) {
       throw new IllegalStateException("Cannot close InitialContext. Reason: " + ex, ex.getCause());
       }
       }
       }
      
      }
      




      so now i'm trying to call my service like that :

       TraxManager TraxManager = (TraxManager) EJBHomeFactory.lookup("TraxService/remote");
      


      but when i test receive the following error :

      Exception in thread "main" java.lang.UnsupportedClassVersionError: Bad version number in .class file
       at java.lang.ClassLoader.defineClass1(Native Method)
       at java.lang.ClassLoader.defineClass(ClassLoader.java:620)
       at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:124)
       at java.net.URLClassLoader.defineClass(URLClassLoader.java:260)
       at java.net.URLClassLoader.access$100(URLClassLoader.java:56)
       at java.net.URLClassLoader$1.run(URLClassLoader.java:195)
       at java.security.AccessController.doPrivileged(Native Method)
       at java.net.URLClassLoader.findClass(URLClassLoader.java:188)
       at java.lang.ClassLoader.loadClass(ClassLoader.java:306)
       at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:268)
       at java.lang.ClassLoader.loadClass(ClassLoader.java:299)
       at java.lang.ClassLoader.loadClass(ClassLoader.java:251)
       at java.lang.ClassLoader.loadClassInternal(ClassLoader.java:319)
       at java.lang.Class.forName0(Native Method)
       at java.lang.Class.forName(Class.java:242)
       at org.jboss.remoting.loading.RemotingClassLoader.loadClassDelegate(RemotingClassLoader.java:106)
       at org.jboss.remoting.loading.RemotingClassLoader.loadClass(RemotingClassLoader.java:80)
       at java.lang.ClassLoader.loadClassInternal(ClassLoader.java:319)
       at java.lang.Class.forName0(Native Method)
       at java.lang.Class.forName(Class.java:242)
       at org.jboss.remoting.loading.ObjectInputStreamWithClassLoader.resolveProxyClass(ObjectInputStreamWithClassLoader.java:250)
       at java.io.ObjectInputStream.readProxyDesc(ObjectInputStream.java:1500)
       at java.io.ObjectInputStream.readClassDesc(ObjectInputStream.java:1463)
       at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1699)
       at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1305)
       at java.io.ObjectInputStream.readObject(ObjectInputStream.java:348)
       at org.jboss.aop.joinpoint.InvocationResponse.readExternal(InvocationResponse.java:119)
       at java.io.ObjectInputStream.readExternalData(ObjectInputStream.java:1755)
       at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1717)
       at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1305)
       at java.io.ObjectInputStream.defaultReadFields(ObjectInputStream.java:1908)
       at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1832)
       at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1719)
       at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1305)
       at java.io.ObjectInputStream.readObject(ObjectInputStream.java:348)
       at org.jboss.remoting.serialization.impl.java.JavaSerializationManager.receiveObjectVersion2_2(JavaSerializationManager.java:238)
       at org.jboss.remoting.serialization.impl.java.JavaSerializationManager.receiveObject(JavaSerializationManager.java:138)
       at org.jboss.remoting.marshal.serializable.SerializableUnMarshaller.read(SerializableUnMarshaller.java:123)
       at org.jboss.remoting.transport.socket.MicroSocketClientInvoker.versionedRead(MicroSocketClientInvoker.java:1215)
       at org.jboss.remoting.transport.socket.MicroSocketClientInvoker.transport(MicroSocketClientInvoker.java:845)
       at org.jboss.remoting.MicroRemoteClientInvoker.invoke(MicroRemoteClientInvoker.java:160)
       at org.jboss.remoting.Client.invoke(Client.java:1708)
       at org.jboss.remoting.Client.invoke(Client.java:612)
       at org.jboss.aspects.remoting.InvokeRemoteInterceptor.invoke(InvokeRemoteInterceptor.java:60)
       at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:102)
       at org.jboss.ejb3.proxy.remoting.IsLocalProxyFactoryInterceptor.invoke(IsLocalProxyFactoryInterceptor.java:72)
       at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:102)
       at org.jboss.aspects.remoting.PojiProxy.invoke(PojiProxy.java:62)
       at $Proxy0.createProxyBusiness(Unknown Source)
       at org.jboss.ejb3.proxy.objectfactory.session.SessionProxyObjectFactory.createProxy(SessionProxyObjectFactory.java:129)
       at org.jboss.ejb3.proxy.objectfactory.session.stateless.StatelessSessionProxyObjectFactory.getProxy(StatelessSessionProxyObjectFactory.java:79)
       at org.jboss.ejb3.proxy.objectfactory.ProxyObjectFactory.getObjectInstance(ProxyObjectFactory.java:156)
       at javax.naming.spi.NamingManager.getObjectInstance(NamingManager.java:304)
       at org.jnp.interfaces.NamingContext.getObjectInstance(NamingContext.java:1447)
       at org.jnp.interfaces.NamingContext.getObjectInstanceWrapFailure(NamingContext.java:1464)
       at org.jnp.interfaces.NamingContext.lookup(NamingContext.java:818)
       at org.jnp.interfaces.NamingContext.lookup(NamingContext.java:682)
       at javax.naming.InitialContext.lookup(InitialContext.java:351)
       at com.voipover.utils.EJBHomeFactory.lookup(EJBHomeFactory.java:23)
       at com.voipover.utils.vtraxClientTest.main(vtraxClientTest.java:35)
      
      
      


      any idea?

      and thanks a lot

        • 1. Re: tuning ejb3 calling
          jaikiran pai Master

           

          Exception in thread "main" java.lang.UnsupportedClassVersionError: Bad version number in .class file

          Actually, this isn't specific to EJB3 or tuning of EJB3 :) I guess you compiled some class (or classes) using a higher version of Java (Java 1.6?) and are using it in a server running on a lower version of Java (Java 1.5?)

          • 2. Re: tuning ejb3 calling
            sdsd sdasd Newbie

            hi jaikiran,

            Actually, this isn't specific to EJB3 or tuning of EJB3 :)

            :d , yeah but is there a know pattern or best practices for that ? if yes is there some example somewhere :d ?


            yeah thanks yu were right in my jboss side i was compiling ejb's with java6


            and thanks a lot