hello everybody,
currently we are migrating our EJB 2.1 (about 850 EJBs) to EJB 3.0. till now
there have not been too many problems, but today i meet a special challeng when
i migrated a Stateful Session Bean.
the SFSB, lets call it MyStatefulSessionBean implements a Remote Business
Interface (MyStatefulSession) and gets deployed in a EAR (MyEAR.ear). from a
standalone client i can lookup, cast and use the SFSB successfully.
otherwise we deploy a WAR, too. from there i can lookup the SFSB, but cannot
use it, because casting results in ClassCastException:
Context context = ContextFactory.getInstance().getContext();
| MyStatefulSession session = (MyStatefulSession)
context.lookup("MyEAR/MyStatefulSession/remote");
$Proxy123 cannot be cast to xzy.MyStatefulSession
the MyStatefulSession.class is packaged in server/MyServer/lib/MyLibrary.jar
and in our EAR, too.
i tried to remove all duplicate interfaces and classes from the EAR, but than i
get java.lang.VerifyError -that i cannot understand- in arbitrary
implementation classes (even in EJB 2.1 SLSB).
2009-03-04 11:48:41,837 WARN [org.jboss.ejb.EJBDeployer] Verify failed;
continuing
| java.lang.VerifyError: (class: a/b/c/ArbitraryBean, method: getSomething
signature: (Ljava/lang/String;ILx/y/z/SomeDTO;)Ljava/util/ArrayList;)
Incompatible argument to function
| at java.lang.Class.getDeclaredMethods0(Native Method)
| at java.lang.Class.privateGetDeclaredMethods(Unknown Source)
| at java.lang.Class.privateGetPublicMethods(Unknown Source)
| at java.lang.Class.getMethods(Unknown Source)
| at
org.jboss.verifier.strategy.AbstractVerifier.hasEJBCreateMethod(AbstractVerifier.java:687)
| at
org.jboss.verifier.strategy.EJBVerifier21.verifySessionBean(EJBVerifier21.java:858)
my idea is that all classes and interfaces that will be used from EAR and WAR,
should go to server/MyServer/lib/, implementation classes should remain in EAR,
servlets should go into WAR.
is that right? if so, we have to refactor our ANT builds, i guess ; )
anyway... i wonder why our packaging strategy do not show any conflicts for
Stateless Session Beans. maybe someone can help me with this...?
thanks in advance
robert
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