topic Re: Same Feeder Class for 2 GUIBBs in Application Development and Automation Discussions

Same Feeder Class for 2 GUIBBs

Bhaskar_Tripath — Thu, 24 Apr 2014 04:51:19 GMT

Hi All,

I have created one feeder class for 2 GUIBBs (List UIBB and Form UIBB) by implementing respective interfaces for them. These GUIBBs have been included in the same user screen. I have also setup parameter for this feeder class (No meaningful purpose, but just to try out). Here are my questions:

1. I was expecting a single instance of this class when user enters the screen which would then become basis for sharing data between these UIBBs. However, I noticed that 2 instance were created for each UIBB. Is it the normal behaviour? I also tried giving same value or no value to feeder class parameter but for no help.

2. To get rid of above problem, I declared feeder class attributes that were part of sharing as static attributes. But now the problem was, my Form data was dependent on List data. So I wanted that GET_DATA method of List UIBB should be called before GET_DATA method of Form UIBB. However, Form method is getting called first. Since it always happen, I wanted to know how the system decides on the sequence of calls and is there any way to program /change that sequence.

Thanks!

Bhaskar

Re: Same Feeder Class for 2 GUIBBs

Bhaskar_Tripath — Fri, 25 Apr 2014 08:15:17 GMT

Guys.....any idea please...

Tagging the experts to get their attention

Re: Same Feeder Class for 2 GUIBBs

ChrisSolomon — Wed, 14 May 2014 16:57:20 GMT

Sorry...can't be much help at the moment....not in front of system to try some of this out..But to answer you....

1. "I was expecting"....well there's your first mistake when it comes to anything SAP does. haha To "force" the behavior you want/expect, you will need to put some checking in the class constructor to insure that only one instance is create. This is done in other things like workflow so you should be able to find some examples and/or code. Look for examples on creating SINGLETON class objects.

2. Fix #1 and then this one won't be a problem. I would not use all static attributes/methods as those are really "global" and not instance specific unless you are merely using them as blackbox-ish functions/variables.

Hope this helps!

Re: Same Feeder Class for 2 GUIBBs

Former Member — Wed, 14 May 2014 17:49:14 GMT

moved to

Re: Same Feeder Class for 2 GUIBBs

siddharthrajora — Thu, 15 May 2014 01:07:29 GMT

This message was moderated.

Re: Same Feeder Class for 2 GUIBBs

Bhaskar_Tripath — Thu, 22 May 2014 12:34:45 GMT

So this is what I am trying to do:

When the user enter Pernr and hit 'Search',

- all the related records should get updated in the list.

- Details section should get updated with the 1st index record

- On selection of other records from list, the related data should get update in details section.

Now the problem is, as I mentioned, the GET_DATA method of Form UIBB is getting called before List UIBB. Due to this, there is a lag in the details section data update. As earlier noted, I am using the same class for both UIBBs.

Advice please.

Best Regards,

Bhaskar

Re: Same Feeder Class for 2 GUIBBs

siva_kumar_vemula — Wed, 09 Jul 2014 08:38:47 GMT

Hi Bhaskar,

Please don't use Same feeder class for both Form and List, You definitely need two different feeder class. In your scenario try implementing WIRING concept to share data between these two feeder classes.

Have a look at

Cheers,
Siva Kumar.