How to design a auto-route Command?

From: Steven Woody (steven_at_steven4u.net)
Date: 10/26/03 

Date: Sun, 26 Oct 2003 22:40:28 +0800

The blow is from Floyd Marinescu's "EJB Design Patterns":

---- cite ---
Client-Side routing logic. Usualling a framework of classes that is
responsible for taking a Command and sending it to the remote EJB
server. This routing logic is usually not visible to the client, and
is triggered by calling a command's execute() method ...
--------------

I'm thinking about designing the above 'Command' object, that means,
the execute() method of base class likely to be:

Command.execute():
        IF need_routing THEN
           find out a remote CommandExecutor object then delegate the
           execution of Command to it; (a)
        ELSE
           just return; (b)
        END

and, in the DerivedCommand.execute():
     Supper();
     do some concrete things;

In the step of (b), I think the control return to the code of derived
DerivedCommmand.execute(), that is right. But how can I preventing
the control return to the DerivedCommand.execute() after (a)?

Maybe, I'm totally wrong here, I'm just manage to find the correct
solution to design such kind of a auto-route Command object. Any
comments would be appreciated! 

-- 
Steven Woody
steven@lczmsoft.com
%% (fortunes)
Q:  How did you get into artificial intelligence?
A:  Seemed logical -- I didn't have any real intelligence.

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