Is it safe to store reference?

Question

I'm new to EJB, I've read about dynamic loading in EJB to improve performance. Is it safe to store a reference to object returned by InitialContext, because I assume that InitialContext returns an object representing the "class", not the "instance"?
For example:
public class SomeBean extends ...
    private Object objRef;
    public SomeDetail getDetail()
        try {
            Context jndiCtx = null;
            if (objRef == null)
                jndiCtx = new InitialContext();
                objRef = jndiCtx.lookup("Detail");
            Detail = (Detail)
                PortableRemoteObject.narrow(objRef, Detail.class);
        } catch (Exception NamingException) {
            NamingException.printStackTrace();
    }

Answer 1

No it isn't safe the way you have done it, and the lookup does not return you a "class" object, it returns a stub. You can, however, store references to Objects but these should be executed in the setSessionContext() or setEntityContext() methods - as these are always called before you can call the Remote methods on the bean (ie. when the bean is "resurrected" they will be called again - they will NOT be called every time a Remote method is called).