Stateful SessionBeans

[frankster]

Hello!

I´m a totaly newbie in programming with EJB3.0
So I tried a very easy tutorial for Stateful SessionBeans.
I always get an "Exception in thread "main" java.lang.NoClassDefFoundError: Lorg/jboss/invocation/Invoker"

Exception in thread "main" java.lang.NoClassDefFoundError: Lorg/jboss/invocation/Invoker;
 at java.lang.Class.getDeclaredFields0(Native Method)
 at java.lang.Class.privateGetDeclaredFields(Unknown Source)
 at java.lang.Class.getDeclaredField(Unknown Source)
 at java.io.ObjectStreamClass.getDeclaredSUID(Unknown Source)
 at java.io.ObjectStreamClass.access$700(Unknown Source)
 at java.io.ObjectStreamClass$2.run(Unknown Source)
 at java.security.AccessController.doPrivileged(Native Method)
 at java.io.ObjectStreamClass.<init>(Unknown Source)
 at java.io.ObjectStreamClass.lookup(Unknown Source)
 at java.io.ObjectStreamClass.initNonProxy(Unknown Source)
 at java.io.ObjectInputStream.readNonProxyDesc(Unknown Source)
 at java.io.ObjectInputStream.readClassDesc(Unknown Source)
 at java.io.ObjectInputStream.readOrdinaryObject(Unknown Source)
 at java.io.ObjectInputStream.readObject0(Unknown Source)
 at java.io.ObjectInputStream.defaultReadFields(Unknown Source)
 at java.io.ObjectInputStream.readSerialData(Unknown Source)
 at java.io.ObjectInputStream.readOrdinaryObject(Unknown Source)
 at java.io.ObjectInputStream.readObject0(Unknown Source)
 at java.io.ObjectInputStream.defaultReadFields(Unknown Source)
 at java.io.ObjectInputStream.readSerialData(Unknown Source)
 at java.io.ObjectInputStream.readOrdinaryObject(Unknown Source)
 at java.io.ObjectInputStream.readObject0(Unknown Source)
 at java.io.ObjectInputStream.readObject(Unknown Source)
 at org.jboss.aop.joinpoint.InvocationResponse.readExternal(InvocationResponse.java:107)
 at java.io.ObjectInputStream.readExternalData(Unknown Source)
 at java.io.ObjectInputStream.readOrdinaryObject(Unknown Source)
 at java.io.ObjectInputStream.readObject0(Unknown Source)
 at java.io.ObjectInputStream.defaultReadFields(Unknown Source)
 at java.io.ObjectInputStream.readSerialData(Unknown Source)
 at java.io.ObjectInputStream.readOrdinaryObject(Unknown Source)
 at java.io.ObjectInputStream.readObject0(Unknown Source)
 at java.io.ObjectInputStream.readObject(Unknown Source)
 at org.jboss.remoting.serialization.impl.java.JavaSerializationManager.receiveObject(JavaSerializationManager.java:128)
 at org.jboss.remoting.marshal.serializable.SerializableUnMarshaller.read(SerializableUnMarshaller.java:66)
 at org.jboss.remoting.transport.socket.SocketClientInvoker.transport(SocketClientInvoker.java:279)
 at org.jboss.remoting.RemoteClientInvoker.invoke(RemoteClientInvoker.java:143)
 at org.jboss.remoting.Client.invoke(Client.java:525)
 at org.jboss.remoting.Client.invoke(Client.java:488)
 at org.jboss.aspects.remoting.InvokeRemoteInterceptor.invoke(InvokeRemoteInterceptor.java:41)
 at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:88)
 at org.jboss.aspects.remoting.IsLocalInterceptor.invoke(IsLocalInterceptor.java:34)
 at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:88)
 at org.jboss.aspects.remoting.PojiProxy.invoke(PojiProxy.java:46)
 at $Proxy0.createProxy(Unknown Source)
 at org.jboss.ejb3.JndiProxyFactory.getObjectInstance(JndiProxyFactory.java:52)
 at javax.naming.spi.NamingManager.getObjectInstance(Unknown Source)
 at org.jnp.interfaces.NamingContext.getObjectInstance(NamingContext.java:1125)
 at org.jnp.interfaces.NamingContext.getObjectInstanceWrapFailure(NamingContext.java:1142)
 at org.jnp.interfaces.NamingContext.lookup(NamingContext.java:705)
 at org.jnp.interfaces.NamingContext.lookup(NamingContext.java:587)
 at javax.naming.InitialContext.lookup(Unknown Source)
 at client.calcClient.main(calcClient.java:16)

Here are my codes:

CalculatorSession

package calculator;
import java.io.Serializable;

@javax.ejb.Stateful
public class CalculatorSession implements ICalculator, Serializable {
 static final long serialVersionUID = 7422574264557894633L;
 public int last;

 public CalculatorSession(){
 last = 0;
 }
 public int add(int a, int b) {
 last = a+b;
 return a+b;
 }

 public int last() {
 return last;
 }
}

ICalculator

package calculator;

@javax.ejb.Remote
public interface ICalculator{
 public int add(int a, int b);

 public int last();
}

calcClient

package client;

import java.util.Properties;
import javax.naming.InitialContext;
import calculator.*;

public class calcClient {

 public static void main(String[] args) throws Exception {

 Properties p = new Properties();
 p.put("java.naming.factory.inition","org.jnp.interfaces.NamingContextFactory");
 p.put("java.naming.factory.url.pkgs","org.jboss.naming:org.jnp.interfaces");
 p.put("java.naming.provider.url","jnp://localhost:1099");
 InitialContext ctx = new InitialContext(p);
 ICalculator calc = (ICalculator) ctx.lookup("CalculatorSession/remote");

 System.out.println("2 + 1 = " + calc.add(2,1));
 System.out.println("LAST: " + calc.last());

 System.out.println("2 + 4 = " + calc.add(2,4));
 System.out.println("LAST: " + calc.last());
 }
}

I installed:
JBOSS AS 4.0.4
JBossIDE 2.0.0.Beta2
Eclipse 3.2.1

Many Thanks
Frankster

[jaikiran]

You will have to place the JBoss jar files(specifically the jar containing the org.jboss.invocation.Invoker class) in your client's classpath. I dont exactly remember the jar file names that you require in the client's classpath, but all the appropriate jars can be found in the %JBOSS_HOME%/client folder.