java.lang.Class cannot be cast to java.lang.String when invoking a EJB Bean Method
gizzie Jul 15, 2014 9:37 AMI've faced with the problem. I've successfully lookuped my remote bean from JBoss, but when I try to invoke any of its method next exception is about to appear:
java.lang.Class cannot be cast to java.lang.String.
Full stack trace is:
java.lang.ClassCastException: java.lang.Class cannot be cast to java.lang.String
at org.jboss.ejb.client.remoting.ProtocolMessageHandler.readAttachments(ProtocolMessageHandler.java:56)
at org.jboss.ejb.client.remoting.InvocationExceptionResponseHandler$MethodInvocationExceptionResultProducer.getResult(InvocationExceptionResponseHandler.java:85)
at org.jboss.ejb.client.EJBClientInvocationContext.getResult(EJBClientInvocationContext.java:212)
at org.jboss.ejb.client.TransactionInterceptor.handleInvocationResult(TransactionInterceptor.java:47)
at org.jboss.ejb.client.EJBClientInvocationContext.getResult(EJBClientInvocationContext.java:214)
at org.jboss.ejb.client.ReceiverInterceptor.handleInvocationResult(ReceiverInterceptor.java:96)
at org.jboss.ejb.client.EJBClientInvocationContext.getResult(EJBClientInvocationContext.java:203)
at org.jboss.ejb.client.EJBClientInvocationContext.awaitResponse(EJBClientInvocationContext.java:341)
at org.jboss.ejb.client.EJBInvocationHandler.doInvoke(EJBInvocationHandler.java:126)
at org.jboss.ejb.client.EJBInvocationHandler.doInvoke(EJBInvocationHandler.java:107)
at org.jboss.ejb.client.EJBInvocationHandler.invoke(EJBInvocationHandler.java:90)
at com.sun.proxy.$Proxy32.createEvent(Unknown Source)
at com.mypackage.FacadeImpl.createEvent(FacadeImpl.java:89)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at org.springframework.aop.support.AopUtils.invokeJoinpointUsingReflection(AopUtils.java:317)
at org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:201)
at com.sun.proxy.$Proxy28.createEvent(Unknown Source)
Last row is the invocation of my method called "CreateEvent".
I guess the exception is throwned inside "getResult()" method of EJBClientInvocationContext.
My code is:
IEventDao eventDao = (IEventDao) ctx.lookup("java:/task/EventDao!MyPackage.IEventDao");
EventDao has been successfully gotten from the remote.
Trying to invoke a method:
public Event createEvent(final Event event) {
return eventDao.createEvent(event);
}
Event event = new EventImpl("Test event: Star Wars: Episode VI");
createEvent(event); <-- Line #89. Exception has been throwned.
CreateEvent method body. But just for your info: it's not even enter this piece of code. It throwns the exception before even invoking `entityManager.persist(event);`
@Transactional(propagation = Propagation.REQUIRED)
public Event createEvent(Event event) {
entityManager.persist(event);
return event;
}
Any ideas? Thank you.