Question re: Java System vs. ABAP + Java System

Hello everyone,
I posted this message in the EP Implementation forum without realizing there is a dedicated WAS General forum; I apologize to those of you who might have read this already.
My question is;
Under what scenario would I want to install my Web Application Server as an ABAP + Java system?
We have been working with our development Portal server for a few months now with a high degree of success and the WAS Server it sits on is setup as a Java System only.
I understand that for Portals and using business packages in portal I only need Java WAS.
I guess I am only left with the question, when or why would I want to install the ABAP engine?
Would you use that for a different application that sits on WAS other than Portals?
Are there benefits in installing the ABAP engine that you do not have with a Java only system?
Thanks in advance for your help,
~Henry

Hi Henry,
Your ABAP stack in WAS server in nothing but your SAP R/3 System. In earlier versions only ABAP stack was available. But now SAP has combined both JAVA and ABAP stack into one. So, if anyone wants to work on both the things then they can you one single server only. No need to have different servers for that.
If your purpose solves with the only JAVA stack then you can continue with that. But, if you are going to install new server and you want to work on both ABAP as well as JAVA then better to install WAS 6.40 with ABAP+JAVA stack. So, single server will setisfy your whole requirement.
I hope you satistied with this answer.
Regards,
Bhavik

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Edited by: EJP on 13/04/2011 10:44: added code tags. Please use them.

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Thanks for the reply. Perhaps I should have mentioned that Object A does not have a method to return a referenece to Objects B and C. That's my problem. Was just wondering if there is some other way to obtain those refereneces. The reason I mentioned that I don't have the source code for Object A is because if I did, I could obviously write a method that would return me the references.
I'm not new to Java, nor am I an expert either. I'm pretty well up-to-speed on object oriented design though.
I'll provide more specifics on my problem just in case there is a solution to my problem. My code (class) is attempting to establish a connection with a mainframe computer through a web server portal using terminal emulation software provided by a 3rd party vendor. They provide an SDK that contains all the java classes necessary to establsih the connection. To establish the connection, you are required to build a java Properties object that contains all the parameters for the connection (host id, etc.) and pass that properties object to the constructor for the "Object A" class. That object actually establishes the session object using the parameters object you pass it. The session gets displayed in a standalone Applet ("Object A" class extends Applet). You can click on the applet, sign in to the system, and do whatever just fine using your keyboard. However, I wish to send commands to the session from my originating java code. The session object has a method to send commands to the session, but to do that, I need a handle to the session object that was created. I don't have that, and it appears they don't provide a method to get that. Looks like the vendor's intent was just for the user to interface with the session/Applet via the keyboard.

Question re: Java System vs. ABAP + Java System

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