java.rmi.RemoteException: RemoteException occurred in server
Hi,
I am trying to implement a simple shopping cart using stateful Session Bean.
I am passing an item from the client and bean is supposed to add this item in an ArrayList object and return this ArrayList object.
I don't know what's going wrong.
I am getting this error:
Adding item to cart java.rmi.ServerException: RemoteException occurred in server thread; nested exception is: java.rmi.ServerException: RuntimeException; nested exception is: java.lang.ClassCastException at sun.rmi.server.UnicastServerRef.dispatch(UnicastServerRef.java:292) at sun.rmi.transport.Transport$1.run(Transport.java:148) at java.security.AccessController.doPrivileged(Native Method) at sun.rmi.transport.Transport.serviceCall(Transport.java:144) at sun.rmi.transport.tcp.TCPTransport.handleMessages(TCPTransport.java:460) at sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.run(TCPTransport.java:701) at java.lang.Thread.run(Thread.java:534) at sun.rmi.transport.StreamRemoteCall.exceptionReceivedFromServer(StreamRemoteCall.java:247) at sun.rmi.transport.StreamRemoteCall.executeCall(StreamRemoteCall.java:223) at sun.rmi.server.UnicastRef.invoke(UnicastRef.java:133) at org.jboss.invocation.jrmp.server.JRMPInvoker_Stub.invoke(Unknown Source) at org.jboss.invocation.jrmp.interfaces.JRMPInvokerProxy.invoke(JRMPInvokerProxy.java:135) at org.jboss.invocation.InvokerInterceptor.invoke(InvokerInterceptor.java:87) at org.jboss.proxy.TransactionInterceptor.invoke(TransactionInterceptor.java:46) at org.jboss.proxy.SecurityInterceptor.invoke(SecurityInterceptor.java:45) at org.jboss.proxy.ejb.StatefulSessionInterceptor.invoke(StatefulSessionInterceptor.java:104) at org.jboss.proxy.ClientContainer.invoke(ClientContainer.java:85) at $Proxy1.addToCart(Unknown Source) at cart.client.ShoppingCartClient.testBean(ShoppingCartClient.java:54) at cart.client.ShoppingCartClient.main(ShoppingCartClient.java:95) Caused by: java.rmi.ServerException: RuntimeException; nested exception is: java.lang.ClassCastException at org.jboss.ejb.plugins.LogInterceptor.handleException(LogInterceptor.java:360) at org.jboss.ejb.plugins.LogInterceptor.invoke(LogInterceptor.java:195) at org.jboss.ejb.plugins.ProxyFactoryFinderInterceptor.invoke(ProxyFactoryFinderInterceptor.java:122) at org.jboss.ejb.StatefulSessionContainer.internalInvoke(StatefulSessionContainer.java:410) at org.jboss.ejb.Container.invoke(Container.java:674) 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:324) at org.jboss.mx.capability.ReflectedMBeanDispatcher.invoke(ReflectedMBeanDispatcher.java:284) at org.jboss.mx.server.MBeanServerImpl.invoke(MBeanServerImpl.java:549) at org.jboss.invocation.jrmp.server.JRMPInvoker.invoke(JRMPInvoker.java:359) 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:324) at sun.rmi.server.UnicastServerRef.dispatch(UnicastServerRef.java:261) at sun.rmi.transport.Transport$1.run(Transport.java:148) at java.security.AccessController.doPrivileged(Native Method) at sun.rmi.transport.Transport.serviceCall(Transport.java:144) at sun.rmi.transport.tcp.TCPTransport.handleMessages(TCPTransport.java:460) at sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.run(TCPTransport.java:701) at java.lang.Thread.run(Thread.java:534) Caused by: java.lang.ClassCastException at cart.sessionbean.MyCartEJBSession.getDao(MyCartEJBSession.java:44) at cart.sessionbean.MyCartEJBSession.addToCart(MyCartEJBSession.java:56) 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:324) at org.jboss.ejb.StatefulSessionContainer$ContainerInterceptor.invoke(StatefulSessionContainer.java:878) at org.jboss.ejb.plugins.SecurityInterceptor.invoke(SecurityInterceptor.java:117) at org.jboss.resource.connectionmanager.CachedConnectionInterceptor.invoke(CachedConnectionInterceptor.java:186) at org.jboss.ejb.plugins.StatefulSessionInstanceInterceptor.invoke(StatefulSessionInstanceInterceptor.java:271) at org.jboss.ejb.plugins.AbstractTxInterceptor.invokeNext(AbstractTxInterceptor.java:84) at org.jboss.ejb.plugins.TxInterceptorCMT.runWithTransactions(TxInterceptorCMT.java:243) at org.jboss.ejb.plugins.TxInterceptorCMT.invoke(TxInterceptorCMT.java:104) at org.jboss.ejb.plugins.LogInterceptor.invoke(LogInterceptor.java:191) ... 21 more
And this is the client code:
package cart.client;
import java.rmi.RemoteException;
import java.util.Hashtable;
import java.util.ArrayList;
import javax.ejb.CreateException;
import javax.naming.InitialContext;
import javax.naming.NamingException;
import javax.rmi.*;
import cart.sessionbean.dao.CartContents;
import cart.sessionbean.*;
/**
* @author Abhishek
*
* To change the template for this generated type comment go to
* Window>Preferences>Java>Code Generation>Code and Comments
*/
public class ShoppingCartClient {
CartContents cartObject=new CartContents();
ArrayList resultCart=new ArrayList();
int size=0;
private cart.sessionbean.MyCartEJBHome getHome() throws NamingException {
Object ref= getContext().lookup(cart.sessionbean.MyCartEJBHome.JNDI_NAME);
MyCartEJBHome mycart =(cart.sessionbean.MyCartEJBHome)PortableRemoteObject.narrow(ref,MyCartEJBHome.class);
return mycart;
}
private InitialContext getContext() throws NamingException {
Hashtable props = new Hashtable();
props.put(
InitialContext.INITIAL_CONTEXT_FACTORY,
"org.jnp.interfaces.NamingContextFactory");
props.put(InitialContext.PROVIDER_URL, "jnp://127.0.0.1:1099");
InitialContext initialContext = new InitialContext(props);
return initialContext;
}
public void testBean() {
try {
cart.sessionbean.MyCartEJB myBean = getHome().create(resultCart);
//--------------------------------------
//This is the place you make your calls.
System.out.println("Adding item to cart");
resultCart=myBean.addToCart("id001",1);
System.out.println("Going to Sleep for 1 min ......................... " );
Thread.sleep(60000); // sleep for 1 minute.
//System.out.println("Reply from bean after 1min " + myBean.getMyCart());
resultCart=myBean.getMyCart();
size=resultCart.size();
for(int i=0;i<size;i++)
{
cartObject=(CartContents)resultCart.get(i);
System.out.println(cartObject.getItemid());
System.out.println(cartObject.getQuantity());
}
System.out.println("Going to Sleep for 1 min ......................... " );
Thread.sleep(60000);
System.out.println("Adding item to cart");
resultCart=myBean.addToCart("id002",2);
resultCart=myBean.getMyCart();
for(int i=0;i<size;i++)
{
cartObject=(CartContents)resultCart.get(i);
System.out.println(cartObject.getItemid());
System.out.println(cartObject.getQuantity());
}
} catch (RemoteException e) {
e.printStackTrace();
} catch (CreateException e) {
e.printStackTrace();
} catch (NamingException e) {
e.printStackTrace();
} catch (InterruptedException e)
{
}
}
public static void main(String[] args) {
ShoppingCartClient test = new ShoppingCartClient();
test.testBean();
}
}
Don't know what's the error. Please help me.
Thanks.
Abhishek
