Interface inheritence / SessionContext.getInvokedBusinessInt

[rmz]

Hi everyone,

I'm encountering the following problem. I have six interfaces in order to access a Stateful Session Bean, say a bean named "Person". The interface inheritence structure is:

IPerson
|
--- IPersonInt
| |
| ---- IPersonIntRemote
| |
| ---- IPersonIntLocal
|
--- IPersonRemote
|
--- IPersonLocal

The bean class Person is declared to implement IPersonLocal, IPersonRemote, IPersonIntLocal and IPersonIntRemote, including the corresponding @Local and @Remote annotations. Also, for the local and remote interfaces the corresponding annotations are in place.

The problem now is that whatever real interface is used to call the Person bean, SessionContext.getInvokedBusinessInterface() always returns IPerson. In particular, I cannot distinguish between local and remote calls.

I have to say, my experience is quite limited but I would consider this a bug in the code that generates the client stub classes. The spec requires this method to deliver the invoking interface.

Please share your opinions on this issue with me. Maybe there is another way to identify whether the bean has been called remotely or locally?

Thanks,
-Rainer

[jaikiran]

Which version of JBossAS and can you post the lookup code and also the JNDI names that you see for your beans in the jmx-console?

[rmz]

well, actually there is some context about this. I have constructed a simplifed example for which I'll list all relevant code. Please substitute the bean name "Person" --> "ErstesBean".

The following are the interface definitions:

public interface IErstesBean
{
 public String getCallingInterface();
}

@Local
public interface IErstesBeanLocal extends IErstesBean
{
}

@Remote
public interface IErstesBeanRemote extends IErstesBean
{
}

public interface IErstesBeanInt extends IErstesBean
{
 public Object getLocalReference();
 public Object getIntLocalReference();
 public Object getRemoteReference();
 public Object getIntRemoteReference();
}

@Local
public interface IErstesBeanIntLocal extends IErstesBeanInt
{
}

@Remote
public interface IErstesBeanIntRemote extends IErstesBeanInt
{
}

The relevant part of the bean implementation looks like the following:

@Stateful
@Local({ IErstesBeanLocal.class,
 IErstesBeanIntLocal.class
 })
@Remote({ IErstesBeanRemote.class,
 IErstesBeanIntRemote.class
 })
public class ErstesBean implements
IErstesBeanRemote,
IErstesBeanIntRemote
{
 ...

 @Resource
 private SessionContext sessionContextM;

 ...

 public String getCallingInterface()
 {
 if ( sessionContextM == null )
 {
 return null;
 }
 return sessionContextM.getInvokedBusinessInterface().getName();
 }

 ...
}

I see the following registration messages on the server console when deploying:

09:42:14,286 INFO [JndiSessionRegistrarBase] Binding the following Entries in Global JNDI:

 ErstesBean/remote - EJB3.x Default Remote Business Interface
 ErstesBean/remote-server.kap02.IErstesBeanRemote - EJB3.x Remote Business Interface
 ErstesBean/remote-server.kap02.IErstesBeanIntRemote - EJB3.x Remote Business Interface
 ErstesBean/local - EJB3.x Default Local Business Interface
 ErstesBean/local-server.kap02.IErstesBeanIntLocal - EJB3.x Local Business Interface
 ErstesBean/local-server.kap02.IErstesBeanLocal - EJB3.x Local Business Interface

The client code used to allocte and invoke the bean is:

 Properties propsL = new Properties();
 propsL.put( Context.INITIAL_CONTEXT_FACTORY,
 "org.jnp.interfaces.NamingContextFactory");
 propsL.put( Context.URL_PKG_PREFIXES,
 "org.jboss.naming:org.jnp.interfaces");
 propsL.put( Context.PROVIDER_URL,
 "jnp://localhost:1099");
 Context contextL = new InitialContext( propsL);

 Object refL = contextL.lookup("ErstesBean/remote");
 //IErstesBean ebrL = (IErstesBeanRemote) PortableRemoteObject.narrow( refL, IErstesBeanRemote.class);
 IErstesBeanRemote ebrL = (IErstesBeanRemote) PortableRemoteObject.narrow( refL, IErstesBeanRemote.class);

 System.out.println( "Calling interface: " + ebrL.getCallingInterface());

The commented source line here is what ideally I want to do, namely associate the returned interface (stub class) the most generic data type. However I used the specific interface here in order to show what happens more clearly.

When this code is executed, I encounter the following exception:

javax.ejb.EJBException: java.lang.IllegalStateException: Cannot invoke javax.ejb.SessionContext.getInvokedBusinessInterface() from outside of an EJB3 Business View - EJB 3.0 Core Specification 4.5.2; Used: server.kap02.IErstesBean
 at org.jboss.ejb3.tx.Ejb3TxPolicy.handleExceptionInOurTx(Ejb3TxPolicy.java:77)
 at org.jboss.aspects.tx.TxPolicy.invokeInOurTx(TxPolicy.java:83)
 at org.jboss.aspects.tx.TxInterceptor$Required.invoke(TxInterceptor.java:190)
 at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:102)
 at org.jboss.aspects.tx.TxPropagationInterceptor.invoke(TxPropagationInterceptor.java:76)
 at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:102)
 at org.jboss.ejb3.tx.NullInterceptor.invoke(NullInterceptor.java:42)
 at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:102)
 at org.jboss.ejb3.security.RoleBasedAuthorizationInterceptorv2.invoke(RoleBasedAuthorizationInterceptorv2.java:201)
 at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:102)
 at org.jboss.ejb3.security.Ejb3AuthenticationInterceptorv2.invoke(Ejb3AuthenticationInterceptorv2.java:159)
 at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:102)
 at org.jboss.ejb3.ENCPropagationInterceptor.invoke(ENCPropagationInterceptor.java:41)
 at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:102)
 at org.jboss.ejb3.asynchronous.AsynchronousInterceptor.invoke(AsynchronousInterceptor.java:106)
 at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:102)
 at org.jboss.ejb3.BlockContainerShutdownInterceptor.invoke(BlockContainerShutdownInterceptor.java:65)
 at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:102)
 at org.jboss.aspects.currentinvocation.CurrentInvocationInterceptor.invoke(CurrentInvocationInterceptor.java:67)
 at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:102)
 at org.jboss.ejb3.stateful.StatefulContainer.dynamicInvoke(StatefulContainer.java:660)
 at org.jboss.ejb3.session.InvokableContextClassProxyHack._dynamicInvoke(InvokableContextClassProxyHack.java:56)
 at org.jboss.aop.Dispatcher.invoke(Dispatcher.java:91)
 at org.jboss.aspects.remoting.AOPRemotingInvocationHandler.invoke(AOPRemotingInvocationHandler.java:82)
 at org.jboss.remoting.ServerInvoker.invoke(ServerInvoker.java:908)
 at org.jboss.remoting.transport.socket.ServerThread.completeInvocation(ServerThread.java:742)
 at org.jboss.remoting.transport.socket.ServerThread.processInvocation(ServerThread.java:695)
 at org.jboss.remoting.transport.socket.ServerThread.dorun(ServerThread.java:522)
 at org.jboss.remoting.transport.socket.ServerThread.run(ServerThread.java:230)
Caused by: java.lang.IllegalStateException: Cannot invoke javax.ejb.SessionContext.getInvokedBusinessInterface() from outside of an EJB3 Business View - EJB 3.0 Core Specification 4.5.2; Used: server.kap02.IErstesBean
 at org.jboss.ejb3.session.SessionSpecContainer.getInvokedBusinessInterface(SessionSpecContainer.java:303)
 at org.jboss.ejb3.session.SessionContextDelegateBase.getInvokedBusinessInterface(SessionContextDelegateBase.java:73)
 at org.jboss.ejb3.stateful.StatefulSessionContextImpl.getInvokedBusinessInterface(StatefulSessionContextImpl.java:147)
 at server.kap02.ErstesBean.getCallingInterface(ErstesBean.java:114)
 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:597)
 at org.jboss.aop.joinpoint.MethodInvocation.invokeTarget(MethodInvocation.java:122)
 at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:111)
 at org.jboss.ejb3.EJBContainerInvocationWrapper.invokeNext(EJBContainerInvocationWrapper.java:69)
 at org.jboss.ejb3.interceptors.aop.InterceptorSequencer.invoke(InterceptorSequencer.java:73)
 at org.jboss.ejb3.interceptors.aop.InterceptorSequencer.aroundInvoke(InterceptorSequencer.java:59)
 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:597)
 at org.jboss.aop.advice.PerJoinpointAdvice.invoke(PerJoinpointAdvice.java:174)
 at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:102)
 at org.jboss.ejb3.interceptors.aop.InvocationContextInterceptor.fillMethod(InvocationContextInterceptor.java:72)
 at org.jboss.aop.advice.org.jboss.ejb3.interceptors.aop.InvocationContextInterceptor_z_fillMethod_19305075.invoke(InvocationContextInterceptor_z_fillMethod_19305075.java)
 at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:102)
 at org.jboss.ejb3.interceptors.aop.InvocationContextInterceptor.setup(InvocationContextInterceptor.java:88)
 at org.jboss.aop.advice.org.jboss.ejb3.interceptors.aop.InvocationContextInterceptor_z_setup_19305075.invoke(InvocationContextInterceptor_z_setup_19305075.java)
 at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:102)
 at org.jboss.ejb3.connectionmanager.CachedConnectionInterceptor.invoke(CachedConnectionInterceptor.java:62)
 at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:102)
 at org.jboss.ejb3.entity.ExtendedPersistenceContextPropagationInterceptor.invoke(ExtendedPersistenceContextPropagationInterceptor.java:60)
 at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:102)
 at org.jboss.ejb3.entity.TransactionScopedEntityManagerInterceptor.invoke(TransactionScopedEntityManagerInterceptor.java:56)
 at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:102)
 at org.jboss.ejb3.AllowedOperationsInterceptor.invoke(AllowedOperationsInterceptor.java:47)
 at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:102)
 at org.jboss.ejb3.tx.NullInterceptor.invoke(NullInterceptor.java:42)
 at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:102)
 at org.jboss.ejb3.stateful.StatefulInstanceInterceptor.invoke(StatefulInstanceInterceptor.java:81)
 at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:102)
 at org.jboss.aspects.tx.TxPolicy.invokeInOurTx(TxPolicy.java:79)
 at org.jboss.aspects.tx.TxInterceptor$Required.invoke(TxInterceptor.java:190)
 at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:102)
 at org.jboss.aspects.tx.TxPropagationInterceptor.invoke(TxPropagationInterceptor.java:76)
 at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:102)
 at org.jboss.ejb3.tx.NullInterceptor.invoke(NullInterceptor.java:42)
 at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:102)
 at org.jboss.ejb3.security.RoleBasedAuthorizationInterceptorv2.invoke(RoleBasedAuthorizationInterceptorv2.java:201)
 at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:102)
 at org.jboss.ejb3.security.Ejb3AuthenticationInterceptorv2.invoke(Ejb3AuthenticationInterceptorv2.java:159)
 at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:102)
 at org.jboss.ejb3.ENCPropagationInterceptor.invoke(ENCPropagationInterceptor.java:41)
 at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:102)
 at org.jboss.ejb3.asynchronous.AsynchronousInterceptor.invoke(AsynchronousInterceptor.java:106)
 at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:102)
 at org.jboss.ejb3.BlockContainerShutdownInterceptor.invoke(BlockContainerShutdownInterceptor.java:65)
 at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:102)
 at org.jboss.aspects.currentinvocation.CurrentInvocationInterceptor.invoke(CurrentInvocationInterceptor.java:67)
 at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:102)
 at org.jboss.ejb3.stateful.StatefulContainer.dynamicInvoke(StatefulContainer.java:660)
 at org.jboss.ejb3.session.InvokableContextClassProxyHack._dynamicInvoke(InvokableContextClassProxyHack.java:56)
 at org.jboss.aop.Dispatcher.invoke(Dispatcher.java:91)
 at org.jboss.aspects.remoting.AOPRemotingInvocationHandler.invoke(AOPRemotingInvocationHandler.java:82)
 at org.jboss.remoting.ServerInvoker.invoke(ServerInvoker.java:908)
 at org.jboss.remoting.transport.socket.ServerThread.completeInvocation(ServerThread.java:742)
 at org.jboss.remoting.transport.socket.ServerThread.processInvocation(ServerThread.java:695)
 at org.jboss.remoting.transport.socket.ServerThread.dorun(ServerThread.java:522)
 at org.jboss.remoting.transport.socket.ServerThread.run(ServerThread.java:230)
 at org.jboss.remoting.MicroRemoteClientInvoker.invoke(MicroRemoteClientInvoker.java:206)
 at org.jboss.remoting.Client.invoke(Client.java:1708)
 at org.jboss.remoting.Client.invoke(Client.java:612)
 at org.jboss.aspects.remoting.InvokeRemoteInterceptor.invoke(InvokeRemoteInterceptor.java:60)
 at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:102)
 at org.jboss.aspects.tx.ClientTxPropagationInterceptor.invoke(ClientTxPropagationInterceptor.java:61)
 at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:102)
 at org.jboss.ejb3.security.client.SecurityClientInterceptor.invoke(SecurityClientInterceptor.java:65)
 at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:102)
 at org.jboss.ejb3.remoting.IsLocalInterceptor.invoke(IsLocalInterceptor.java:76)
 at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:102)
 at org.jboss.aspects.remoting.PojiProxy.invoke(PojiProxy.java:62)
 at $Proxy2.invoke(Unknown Source)
 at org.jboss.ejb3.proxy.handler.ProxyInvocationHandlerBase.invoke(ProxyInvocationHandlerBase.java:261)
 at org.jboss.ejb3.proxy.handler.session.SessionSpecProxyInvocationHandlerBase.invoke(SessionSpecProxyInvocationHandlerBase.java:101)
 at $Proxy1.getCallingInterface(Unknown Source)
 at client.kap02.ErstesBeanClient.main(ErstesBeanClient.java:53)
 at org.jboss.aspects.remoting.InvokeRemoteInterceptor.invoke(InvokeRemoteInterceptor.java:72)
 at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:102)
 at org.jboss.aspects.tx.ClientTxPropagationInterceptor.invoke(ClientTxPropagationInterceptor.java:61)
 at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:102)
 at org.jboss.ejb3.security.client.SecurityClientInterceptor.invoke(SecurityClientInterceptor.java:65)
 at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:102)
 at org.jboss.ejb3.remoting.IsLocalInterceptor.invoke(IsLocalInterceptor.java:76)
 at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:102)
 at org.jboss.aspects.remoting.PojiProxy.invoke(PojiProxy.java:62)
 at $Proxy2.invoke(Unknown Source)
 at org.jboss.ejb3.proxy.handler.ProxyInvocationHandlerBase.invoke(ProxyInvocationHandlerBase.java:261)
 at org.jboss.ejb3.proxy.handler.session.SessionSpecProxyInvocationHandlerBase.invoke(SessionSpecProxyInvocationHandlerBase.java:101)
 at $Proxy1.getCallingInterface(Unknown Source)
 at client.kap02.ErstesBeanClient.main(ErstesBeanClient.java:53)

So, in summary, what happens is that the server thinks it was called by a business interface called "IErstesBean" which actually is not true. Even if the variable to hold the reference (ebrL) would be of that interface type, the real runtime type should be returned by the session context.

This happens of JBossAS 5.0.0 GA and I also checked on JBoss 5.1.0 GA which shows the same behavior.

Thanks,
-Rainer

[rmz]

Is there really noone who experienced such problems?

Is there a forum better suited for this problem?

Thanks,
-Rainer

[jaikiran]

Rainer,

Sorry, i forgot to look into this. I'll do it today and update this thread.

[jaikiran]

ErstesBean/remote - EJB3.x Default Remote Business Interface
 ErstesBean/remote-server.kap02.IErstesBeanRemote - EJB3.x Remote Business Interface
 ErstesBean/remote-server.kap02.IErstesBeanIntRemote - EJB3.x Remote Business Interface
 ErstesBean/local - EJB3.x Default Local Business Interface
 ErstesBean/local-server.kap02.IErstesBeanIntLocal - EJB3.x Local Business Interface
 ErstesBean/local-server.kap02.IErstesBeanLocal - EJB3.x Local Business Interface

Use the business interface specific JNDI name to lookup the business interface specific proxy:

IErstesBean ebrL = (IErstesBean) contextL.lookup("ErstesBean/remote-server.kap02.IErstesBeanRemote");
System.out.println( "Calling interface: " + ebrL.getCallingInterface());

[rmz]

Thanks a lot, this solves the problem, the failure was on my side.

But still I do not understand this fully. It is true that the beans do not explicitly implement the default business interface, so I thought since the server says it registered that interface it would provide some kind of automatic interface / stub to that bean. Shouldn't I get an exception when trying to lookup an interface that does not really exist? Or at least, when narrowing to a particular existing interface?

Anyhow, this helps me a lot, thanks again,
-Rainer