[jboss-user] [JBoss Microcontainer Users] - Re: How to get DeploymentUnit?

[Juergen.Zimmermann]

I've to implement a class as follows:


  | import java.lang.reflect.Type;
  | import javax.ejb.EJB;
  | import javax.naming.Context;
  | import javax.naming.InitialContext;
  | import javax.naming.NamingException;
  | import javax.ws.rs.ext.Provider;
  | import com.sun.jersey.core.spi.component.ComponentContext;
  | import com.sun.jersey.spi.inject.Injectable;
  | import com.sun.jersey.spi.inject.InjectableProvider;
  | 
  | @Provider
  | public class EJBProvider implements InjectableProvider<EJB, Type> {
  |   public Injectable<Object> getInjectable(ComponentContext componentCtx,
  |                                           EJB ejbAnnotation,
  |                                           Type type) {
  |     if (!(type instanceof Class<?>))
  |       return null;
  | 
  |     Class<?> clazz = (Class<?>) type;
  | 
  |     String beanInterface = ejbAnnotation.beanInterface().getName();
  |     if (Object.class.getName().equals(beanInterface)) {
  |       beanInterface = clazz.getName();
  |     }
  | 
  |     String jndiName = ???;  // get jndi name via beanInterface
  | 
  |     Context ctx = null;
  |     try {
  |       ctx = new InitialContext();
  |       Object obj = ctx.lookup(jndiName);
  | 			
  |       return new Injectable<Object>() {
  |         public Object getValue() {
  |           return obj;
  |         }
  |       };
  |     }
  |     catch (NamingException e) { /* error handling */ }
  |     finally { /* close ctx */ }
  |   }
  | }

So my 1st problem is: how to get the jndi name when the interface of an EJB is available?

I was trying the following where I only would need the DeploymentUnit object. Perhaps there are alternatives. Any hint is highly appreciated!
//import org.jboss.deployers.structure.spi.DeploymentUnit;
  | //import org.jboss.ejb3.common.resolvers.plugins.FirstMatchEjbReferenceResolver;
  | //import org.jboss.ejb3.common.resolvers.spi.EjbReference;
  | //import org.jboss.ejb3.common.resolvers.spi.EjbReferenceResolver;
  | 
  | EjbReference ref = new EjbReference(ejbAnnotation.beanName(),
  |                                     beanInterface,
  |                                     ejbAnnotation.mappedName());
  | EjbReferenceResolver resolver = new FirstMatchEjbReferenceResolver();
  | 		
  | DeploymentUnit du = ???;  // How to get DeploymentUnit? Via ClassLoader?
  | 
  | String jndiName = resolver.resolveEjb(du, ref);
  | 

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