Local interfaces documentation/examples

Question

i'm looking for good examples/documentation on using local interfaces
with weblogic (6.1).
i gave it a try and kept getting a class cast exception while trying to
cast the ic.lookup result to the localhome interface. something tells
me that some deployment descriptors weren't up to snuff perhaps. i'm
using stateless session beans one main bean trying to call others. i'm
also using xdoclet to generate all the interfaces, but not the
deployment descriptors. i've reverted to using remote interfaces for
the time being just to get it all working.
one specific question that i've been getting mixed answers on. for
ejb's to use local interfaces, do they need to be in the same jar/war?
all our beans are deployed as one bean per jar file. makes for lots of
descriptor files ;).
thanks!
~mark

Answer 1

none wrote:
i'm looking for good examples/documentation on using local interfaces
with weblogic (6.1).You might have a look at the bands example. You could also check out
http://learnweblogic.com/updates/webauction.zip
>
i gave it a try and kept getting a class cast exception while trying to
cast the ic.lookup result to the localhome interface. The best way to debug ClassCastExceptions is to print out the class name
and loader of each class.
Something like this:
Object h = ic.lookup("fooHome")
System.out.println("lookup returned "+h.getClass().getName());
System.out.println("loaded by "+h.getClass().getClassLoader());
System.out.println("Trying to cast into "
+FooHome.class.getClassLoader());
something tells
me that some deployment descriptors weren't up to snuff perhaps. i'm
using stateless session beans one main bean trying to call others. i'm
also using xdoclet to generate all the interfaces, but not the
deployment descriptors. i've reverted to using remote interfaces for
the time being just to get it all working.I'd suggest you check out EJBGen as well.
>
one specific question that i've been getting mixed answers on. for
ejb's to use local interfaces, do they need to be in the same jar/war?
all our beans are deployed as one bean per jar file. makes for lots of
descriptor files ;).Personally I'm not a big fan of 1 ejb per jar file. You can make local
calls between jars if they are packaged within the same ear.
-- Rob
>
thanks!
~mark