Integrating Hibernate with EJB

vinoth4s · **Joined:** Tue Nov 11, 2008 8:19 am **Posts:** 11

Hi all,
I am new to EJB and hibernae.

I am using Hibernate 3.0, Jboss 4.0.2, EJB 2.1.Can you please spend your valualbe time and tell me how to integrate EJB and Hibernate. we plan to use stateless session beans which will call the DAO.

I searched in google and i cant find any answer relavant to me.

1. What are the configurations need to be done in JBOSS.
2. How to access the hibernate session in EJB.

Please explain the steps clearly, So that this thread will be useful to me and others. And i have to solve this issue, As soon as possible.

thanks,
Vinoth

vinoth4s · **Joined:** Tue Nov 11, 2008 8:19 am **Posts:** 11

I added the DAO in a utility project. And i tried to use the DAO from the EJB directly and i got tghe following error. I didnt do any configurations. Can you please tell me, what are the steps i have to follow.

Code:

java.rmi.ServerException: RemoteException occurred in server thread; nested exception is: 
   java.rmi.ServerError: Unexpected Error; nested exception is: 
   java.lang.NoClassDefFoundError: org/apache/commons/collections/SequencedHashMap
   at sun.rmi.server.UnicastServerRef.dispatch(UnicastServerRef.java:325)
   at sun.rmi.transport.Transport$1.run(Transport.java:153)
   at java.security.AccessController.doPrivileged(Native Method)
   at sun.rmi.transport.Transport.serviceCall(Transport.java:149)
   at sun.rmi.transport.tcp.TCPTransport.handleMessages(TCPTransport.java:460)
   at sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.run(TCPTransport.java:701)
   at java.lang.Thread.run(Thread.java:595)
   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:126)
   at org.jboss.invocation.jrmp.server.JRMPInvoker_Stub.invoke(Unknown Source)
   at org.jboss.invocation.jrmp.interfaces.JRMPInvokerProxy.invoke(JRMPInvokerProxy.java:118)
   at org.jboss.invocation.InvokerInterceptor.invokeInvoker(InvokerInterceptor.java:227)
   at org.jboss.invocation.InvokerInterceptor.invoke(InvokerInterceptor.java:167)
   at org.jboss.proxy.TransactionInterceptor.invoke(TransactionInterceptor.java:46)
   at org.jboss.proxy.SecurityInterceptor.invoke(SecurityInterceptor.java:55)
   at org.jboss.proxy.ejb.StatelessSessionInterceptor.invoke(StatelessSessionInterceptor.java:97)
   at org.jboss.proxy.ClientContainer.invoke(ClientContainer.java:86)
   at $Proxy2.foo(Unknown Source)
   at com.tcs.nulamda.proxy.EJBMyRemoteFactory.getMyRemote(EJBMyRemoteFactory.java:46)
   at com.tcs.nulamda.proxy.TestProxy.dotest(TestProxy.java:19)
   at com.tcs.nulamda.proxy.TestProxy.main(TestProxy.java:11)
Caused by: java.rmi.ServerError: Unexpected Error; nested exception is: 
   java.lang.NoClassDefFoundError: org/apache/commons/collections/SequencedHashMap
   at org.jboss.ejb.plugins.LogInterceptor.handleException(LogInterceptor.java:399)
   at org.jboss.ejb.plugins.LogInterceptor.invoke(LogInterceptor.java:196)
   at org.jboss.ejb.plugins.ProxyFactoryFinderInterceptor.invoke(ProxyFactoryFinderInterceptor.java:122)
   at org.jboss.ejb.SessionContainer.internalInvoke(SessionContainer.java:624)
   at org.jboss.ejb.Container.invoke(Container.java:873)
   at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
   at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
   at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
   at java.lang.reflect.Method.invoke(Method.java:585)
   at org.jboss.mx.interceptor.ReflectedDispatcher.invoke(ReflectedDispatcher.java:141)
   at org.jboss.mx.server.Invocation.dispatch(Invocation.java:80)
   at org.jboss.mx.server.Invocation.invoke(Invocation.java:72)
   at org.jboss.mx.server.AbstractMBeanInvoker.invoke(AbstractMBeanInvoker.java:249)
   at org.jboss.mx.server.MBeanServerImpl.invoke(MBeanServerImpl.java:644)
   at org.jboss.invocation.jrmp.server.JRMPInvoker$MBeanServerAction.invoke(JRMPInvoker.java:805)
   at org.jboss.invocation.jrmp.server.JRMPInvoker.invoke(JRMPInvoker.java:406)
   at sun.reflect.GeneratedMethodAccessor150.invoke(Unknown Source)
   at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
   at java.lang.reflect.Method.invoke(Method.java:585)
   at sun.rmi.server.UnicastServerRef.dispatch(UnicastServerRef.java:294)
   at sun.rmi.transport.Transport$1.run(Transport.java:153)
   at java.security.AccessController.doPrivileged(Native Method)
   at sun.rmi.transport.Transport.serviceCall(Transport.java:149)
   at sun.rmi.transport.tcp.TCPTransport.handleMessages(TCPTransport.java:460)
   at sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.run(TCPTransport.java:701)
   at java.lang.Thread.run(Thread.java:595)
Caused by: java.lang.NoClassDefFoundError: org/apache/commons/collections/SequencedHashMap
   at org.hibernate.mapping.Table.<init>(Table.java:33)
   at org.hibernate.cfg.Mappings.addTable(Mappings.java:116)
   at org.hibernate.cfg.HbmBinder.bindRootPersistentClassCommonValues(HbmBinder.java:250)
   at org.hibernate.cfg.HbmBinder.bindRootClass(HbmBinder.java:235)
   at org.hibernate.cfg.HbmBinder.bindRoot(HbmBinder.java:151)
   at org.hibernate.cfg.Configuration.add(Configuration.java:360)
   at org.hibernate.cfg.Configuration.addInputStream(Configuration.java:397)
   at org.hibernate.cfg.Configuration.addResource(Configuration.java:446)
   at org.hibernate.cfg.Configuration.parseMappingElement(Configuration.java:1313)
   at org.hibernate.cfg.Configuration.parseSessionFactory(Configuration.java:1285)
   at org.hibernate.cfg.Configuration.doConfigure(Configuration.java:1267)
   at org.hibernate.cfg.Configuration.doConfigure(Configuration.java:1234)
   at org.hibernate.cfg.Configuration.configure(Configuration.java:1162)
   at com.tcs.nulamda.DAO.HibernateSessionFactory.currentSession(HibernateSessionFactory.java:55)
   at com.tcs.nulamda.DAO.HibernateSuspensDAO.testSuspens(HibernateSuspensDAO.java:238)
   at com.tcs.Nulamda.EJBPackage.MyBean.foo(MyBean.java:51)
   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:585)
   at org.jboss.invocation.Invocation.performCall(Invocation.java:345)
   at org.jboss.ejb.StatelessSessionContainer$ContainerInterceptor.invoke(StatelessSessionContainer.java:214)
   at org.jboss.resource.connectionmanager.CachedConnectionInterceptor.invoke(CachedConnectionInterceptor.java:185)
   at org.jboss.ejb.plugins.StatelessSessionInstanceInterceptor.invoke(StatelessSessionInstanceInterceptor.java:130)
   at org.jboss.webservice.server.ServiceEndpointInterceptor.invoke(ServiceEndpointInterceptor.java:51)
   at org.jboss.ejb.plugins.CallValidationInterceptor.invoke(CallValidationInterceptor.java:48)
   at org.jboss.ejb.plugins.AbstractTxInterceptor.invokeNext(AbstractTxInterceptor.java:105)
   at org.jboss.ejb.plugins.TxInterceptorCMT.runWithTransactions(TxInterceptorCMT.java:335)
   at org.jboss.ejb.plugins.TxInterceptorCMT.invoke(TxInterceptorCMT.java:166)
   at org.jboss.ejb.plugins.SecurityInterceptor.invoke(SecurityInterceptor.java:139)
   at org.jboss.ejb.plugins.LogInterceptor.invoke(LogInterceptor.java:192)
   ... 24 more

dirkh · **Joined:** Tue Jan 13, 2009 11:49 am **Posts:** 11

well, you're missing the commons-collections.jar . Go download it from apache.

Dirk

vinoth4s · **Joined:** Tue Nov 11, 2008 8:19 am **Posts:** 11

I already added the Commons-collections.jar file in the library. Please tell me what are the configurations need to be done to use Hibernate in the EJB ?