[jboss-user] [EJB 3.0] - ejb 3.0 optimistic locking problem

[grdzeli_kaci]

i tryed to use locking into ejb 3.0
here is my program fragment 

  | @Stateful
  | @Remote(CountFasade.class)
  | public class CountFasadeBean implements CountFasade {
  | 
  | 	@PersistenceContext(unitName = "Test", type = PersistenceContextType.EXTENDED)
  | 	private EntityManager oracleManager;
  | 
  | 	@TransactionAttribute(TransactionAttributeType.REQUIRED)
  | 	public void update(long start, long end) throws Exception {
  | 		try {
  | 			System.out.println("================ Start ================");
  | 			Test test = oracleManager.find(Test.class, 1100011L);
  | 			System.out.println("test id = " + test.getId());
  | 			System.out.println("test name = " + test.getName());
  | 			System.out.println("test surname = " + test.getSurname());
  | 			System.out.println("test age = " + test.getAge());	
  | 		
  | 			oracleManager.lock(test, LockModeType.WRITE);
  | 
  | 			test.setSurname("From Javaaaa");
  | 
  | 			oracleManager.merge(test);
  | 
  | 			Thread.sleep((1000 * 20));
  | 
  | 			oracleManager.flush();
  | 			System.out.println("================ End ================");
  | 		} catch (Exception e) {
  | 			e.printStackTrace();
  | 			System.out
  | 					.println("================ Exception Own ================");
  | 		}
  | 	}
  | }
  | 
  | 


but  when i tryed to use this method from client i got an error like this :


  | 18:04:48,423 ERROR [STDERR] java.lang.NullPointerException
  | 18:04:48,424 ERROR [STDERR]     at org.hibernate.persister.entity.AbstractEntityPersister.lock(AbstractEntityPersister.java:1282)
  | 18:04:48,424 ERROR [STDERR]     at org.hibernate.event.def.AbstractLockUpgradeEventListener.upgradeLock(AbstractLockUpgradeEventListener.java:88)
  | 18:04:48,424 ERROR [STDERR]     at org.hibernate.event.def.DefaultLockEventListener.onLock(DefaultLockEventListener.java:64)
  | 18:04:48,424 ERROR [STDERR]     at org.hibernate.impl.SessionImpl.fireLock(SessionImpl.java:586)
  | 18:04:48,424 ERROR [STDERR]     at org.hibernate.impl.SessionImpl.lock(SessionImpl.java:578)
  | 18:04:48,424 ERROR [STDERR]     at org.hibernate.ejb.AbstractEntityManagerImpl.lock(AbstractEntityManagerImpl.java:337)
  | 18:04:48,424 ERROR [STDERR]     at org.jboss.ejb3.entity.ExtendedEntityManager.lock(ExtendedEntityManager.java:89)
  | 18:04:48,424 ERROR [STDERR]     at tempPackage.CountFasadeBean.update(CountFasadeBean.java:51)
  | 18:04:48,424 ERROR [STDERR]     at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
  | 18:04:48,424 ERROR [STDERR]     at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
  | 18:04:48,425 ERROR [STDERR]     at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
  | 18:04:48,425 ERROR [STDERR]     at java.lang.reflect.Method.invoke(Method.java:585)
  | 18:04:48,425 ERROR [STDERR]     at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:112)
  | 18:04:48,425 ERROR [STDERR]     at org.jboss.ejb3.interceptor.InvocationContextImpl.proceed(InvocationContextImpl.java:166)
  | 18:04:48,425 ERROR [STDERR]     at org.jboss.ejb3.interceptor.EJB3InterceptorsInterceptor.invoke(EJB3InterceptorsInterceptor.java:63)
  | 18:04:48,425 ERROR [STDERR]     at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101)
  | 18:04:48,425 ERROR [STDERR]     at org.jboss.ejb3.entity.ExtendedPersistenceContextPropagationInterceptor.invoke(ExtendedPersistenceContextPropagationInterceptor.java:71)
  | 18:04:48,425 ERROR [STDERR]     at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101)
  | 18:04:48,425 ERROR [STDERR]     at org.jboss.ejb3.entity.TransactionScopedEntityManagerInterceptor.invoke(TransactionScopedEntityManagerInterceptor.java:54)
  | 18:04:48,428 ERROR [STDERR]     at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101)
  | 18:04:48,428 ERROR [STDERR]     at org.jboss.ejb3.AllowedOperationsInterceptor.invoke(AllowedOperationsInterceptor.java:47)
  | 18:04:48,428 ERROR [STDERR]     at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101)
  | 18:04:48,428 ERROR [STDERR]     at org.jboss.aspects.tx.TxPolicy.invokeInOurTx(TxPolicy.java:79)
  | 18:04:48,428 ERROR [STDERR]     at org.jboss.aspects.tx.TxInterceptor$Required.invoke(TxInterceptor.java:197)
  | 18:04:48,428 ERROR [STDERR]     at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101)
  | 18:04:48,428 ERROR [STDERR]     at org.jboss.aspects.tx.TxPropagationInterceptor.invoke(TxPropagationInterceptor.java:76)
  | 18:04:48,428 ERROR [STDERR]     at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101)
  | 18:04:48,428 ERROR [STDERR]     at org.jboss.ejb3.stateful.StatefulInstanceInterceptor.invoke(StatefulInstanceInterceptor.java:81)
  | 18:04:48,428 ERROR [STDERR]     at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101)
  | 18:04:48,429 ERROR [STDERR]     at org.jboss.aspects.security.AuthenticationInterceptor.invoke(AuthenticationInterceptor.java:78)
  | 18:04:48,429 ERROR [STDERR]     at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101)
  | 18:04:48,429 ERROR [STDERR]     at org.jboss.ejb3.ENCPropagationInterceptor.invoke(ENCPropagationInterceptor.java:47)
  | 18:04:48,429 ERROR [STDERR]     at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101)
  | 18:04:48,458 ERROR [STDERR]     at org.jboss.ejb3.asynchronous.AsynchronousInterceptor.invoke(AsynchronousInterceptor.java:106)
  | 18:04:48,458 ERROR [STDERR]     at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101)
  | 18:04:48,458 ERROR [STDERR]     at org.jboss.ejb3.stateful.StatefulContainer.dynamicInvoke(StatefulContainer.java:297)
  | 18:04:48,458 ERROR [STDERR]     at org.jboss.aop.Dispatcher.invoke(Dispatcher.java:106)
  | 18:04:48,458 ERROR [STDERR]     at org.jboss.aspects.remoting.AOPRemotingInvocationHandler.invoke(AOPRemotingInvocationHandler.java:82)
  | 18:04:48,488 ERROR [STDERR]     at org.jboss.remoting.ServerInvoker.invoke(ServerInvoker.java:828)
  | 18:04:48,488 ERROR [STDERR]     at org.jboss.remoting.ServerInvoker.invoke(ServerInvoker.java:681)
  | 18:04:48,488 ERROR [STDERR]     at org.jboss.remoting.transport.socket.ServerThread.processInvocation(ServerThread.java:358)
  | 18:04:48,488 ERROR [STDERR]     at org.jboss.remoting.transport.socket.ServerThread.dorun(ServerThread.java:412)
  | 18:04:48,488 ERROR [STDERR]     at org.jboss.remoting.transport.socket.ServerThread.run(ServerThread.java:239)
  | 
  | 


can anybody help me ?

Regards,
Paata.

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