JBoss 4.0.3
JDK 1.4.2_08
EJB 2
I am currently experiencing some difficulties with the JBoss 4 class loader.
We use xDoclet to generate Util class to help us lookup RemoteHome interfaces.
Here is an example:
private static Object lookupHome(java.util.Hashtable environment, String
jndiName, Class narrowTo) throws javax.naming.NamingException {
| // Obtain initial context
| javax.naming.InitialContext initialContext = new
javax.naming.InitialContext(environment);
| try {
| Object objRef = initialContext.lookup(jndiName);
| // only narrow if necessary
| if (narrowTo.isInstance(java.rmi.Remote.class))
| return javax.rmi.PortableRemoteObject.narrow(objRef, narrowTo);
| else
| return objRef;
| } finally {
| initialContext.close();
| }
| }
If I call this method with narrowTo be ObjectTypeServiceRemoteHome.class which
extends
javax.ejb.EJBHome (implementing java.rmi.Remote), the call to
narrowTo.isInstance(java.rmi.Remote.class)
returns false (even though narrowTo instanceof java.rmi.Remote is true).
I'm starting to understand the new UCL3, but I'm still unclear why my JVM
doesn't know that javax.ejb.EJBHome implements java.rmi.Remote. The
java.rmi.Remote interface is only present in JAVA_HOME/../rt.jar and EJBHome is
present in default/lib/jboss-j2ee.jar. Could someone tell me a way diagnose
this issue? Do both ObjectTypeServiceRemoteHome and Remote have to be loaded by
the same ClassLoader so
ObjectTypeServiceRemoteHome.class.isInstance(java.rmi.Remote.class) return true?
Any suggestion would be greatly appreciated.
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