Problem with Stateful EJB
I got a problem when developed a simple stateful EJB3. Can you help me to solve this problem. Thanks a lot.
This is remote interface :
package examples.session.stateful;
/**
* The business interface - a plain Java interface with only
* business methods.
*/
public interface Count {
/**
* Increments the counter by 1
*/
public int count();
/**
* Sets the counter to val
* @param val
*/
public void set(int val);
/**
* removes the counter
*/
public void remove();
}
And this is Bean class :
package examples.session.stateful;
import javax.ejb.Remote;
import javax.ejb.Remove;
import javax.ejb.Stateful;
@Stateful
@Remote(Count.class)
public class CountBean implements Count {
/** The current counter is our conversational state. */
private int val;
/**
* The count() business method.
*/
public int count() {
System.out.println("count()");
return ++val;
}
/**
* The set() business method.
*/
public void set(int val) {
this.val = val;
System.out.println("set()");
}
/**
* The remove method is annotated so that the container knows
* it can remove the bean after this method returns.
*/
@Remove
public void remove() {
System.out.println("remove()");
}
}
And test client :
package examples.test.stateful;
import java.util.Properties;
import javax.naming.Context;
import javax.naming.InitialContext;
import examples.session.stateful.Count;
public class CountClient {
/**
* @param args
*/
public static void main(String[] args) {
// TODO Auto-generated method stub
Properties properties = new Properties();
properties.put("java.naming.factory.initial","org.jnp.interfaces.NamingContextFactory");
properties.put("java.naming.factory.url.pkgs","=org.jboss.naming:org.jnp.interfaces");
properties.put("java.naming.provider.url","localhost:1099");
Context ctx;
try {
ctx = new InitialContext(properties);
Count obj = (Count) ctx.lookup("CountBean/remote");
System.out.println(obj);
} catch (Exception e) {
e.printStackTrace();
}
}
}
This is the problem :
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$600(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 examples.test.stateful.CountClient.main(CountClient.java:25)
please, help me as soon as possible.
