Failed EJB3 JNDI lookup.

[dwebster]

This used to work just fine but I am suddenly getting a very odd NoSuchMethodException:

java.lang.NoSuchMethodException: $Proxy76.getValidTerrainTypes(void)

$Proxy76 is supposed to be TerrainEJB (an EJB3 bean that returns valid terrain types for a mapping application).

This is caused by a SWT based client trying invokde the remote EJB3 interface method via a Servlet in a mapping ear application deployed to a JBOSS4.0.3SP1 server.

Here is snippet from the bean:

@Remote
public interface TerrainEJB {

public ArrayList getValidTerrainTypes();
}


The TerrainEJBBean has the actual method. It returns an ArrayList.

The client is an SWT GUI that invokes a Servlet on the JBOSS AS which in turn does the usual JNDI lookup stuff(hard coded strings are actually variables containing the strings...shown for clarity of the problem):

InitialContext vCtx = new InitialContext();
Object vObj = vCtx.lookup("constants.ejb.TerrainEJB");

return(vObj.getClass().getMethod( "getValidTerrainTypes"
,Class[0](void) ).invoke( vObj
,null
));

Which results in the error.


JBOSS initialization of the .ear containing the EJB3 beans shows this:

13:20:59,000 INFO [SessionFactoryImpl] Checking 0 named queries
13:20:59,000 INFO [Ejb3Deployment] Create EntityManager with JNDI name: MapEdit
13:20:59,015 INFO [JaccHelper] JACC Policy Configuration for deployment has been put in service
13:20:59,015 INFO [Ejb3Deployment] EJB3 deployment time took: 1828
13:20:59,109 INFO [ProxyDeployer] no declared remote bindings for : constants.ejb.TerrainEJBBean
13:20:59,125 INFO [ProxyDeployer] there is remote interfaces for constants.ejb.TerrainEJBBean
13:20:59,125 INFO [ProxyDeployer] default remote binding has jndiName of constants.ejb.TerrainEJB

The second ProxyDeployer message looks suspicious...

This code is a veritable copy of some JBOSS example code, LightMinds appletService example (which now suffers from the same error!).

[dwebster]

Actually, it is the FIRST ProxyDeployer message that looks supicious, the one about no declared remote bindings....

[dwebster]

Answering my question, but I've got it working now. Things are a bit pickier now in the way one passes a method call via the Proxy now. The code I was using before to call a method taking no parameters was :

InitialContext ctx = new InitialContext();
Object obj = ctx.lookup(invokeObj.getClassName());

return(obj.getClass().getMethod("methodName",class[0]{void.class}).invoke(obj,Object[] {}));

For whatever reason that seemed to work, but the class[0]{void.class} is bad unless the method declaration in the EJB is explicitly methodName(void);?? How odd is that? So if you have methodName() remove the void.class from the getMethod call and leave it just {}. Duh.... The ProxyDeployer can now find the method.