ABAP Objects vs. BOR to trigger event?

Tue Feb 15 22:48:23 EST 2011

Hi Jocelyn,

I've been following this thread with interest.  I created a test workflow 
triggered by a BOR event and attempted to instantiate the class equivalent 
via a container operation that referenced a 'CreateInstance' functional 
method.  I assumed that the key of the BOR object needed to be coded in 
the Expression field of the container operation, but all the examples I 
can see have the input parameter hard-coded (eg. &ZCL_plant 
.....IV_PLANT='1000'&). However, in order to instantiate the class the 
input parameter needs to be dynamically referenced from the BOR object 
key.  However, when I try to reference the BOR object key field an invalid 
data or syntax error is rendered.  Do you have any advice?

Karl Nietz

From:
"Dart, Jocelyn" <jocelyn.dart at sap.com>
To:
"SAP Workflow Users' Group" <sap-wug at mit.edu>
Date:
15/02/2011 12:41 PM
Subject:
RE: ABAP Objects vs. BOR to trigger event? (Thanks Jocelyn -    Questions 
answered)

No worries Rick. Glad to offer what help we can.

One proviso... FOR THE BENEFIT OF EVERYONE...

Watch you put in the CONSTRUCTOR method of your class. You want to put 
anything with potential performance issues into its own method rather than 
drag the whole class down on instantiation.

Also in particular I would avoid creating recursive calls - i.e. 
instantiating another class in your constructor which instantiates your 
class in its constructor.  The risk of course is creating an infinite loop 
or at worst a nasty deadlock.  Hopefully you wouldn't factor your classes 
that way anyway, but it doesn't hurt to state it in your workflow strategy 
guide for the site... to cater for varying degrees of OO knowledge of your 
developers.

Hope that helps. 
Regards,
Jocelyn

-----Original Message-----
From: sap-wug-bounces at MIT.EDU [mailto:sap-wug-bounces at MIT.EDU] On Behalf 
Of Sample, Rick
Sent: Saturday, 12 February 2011 3:23 AM
To: SAP Workflow Users' Group
Subject: RE: ABAP Objects vs. BOR to trigger event? (Thanks Jocelyn - 
Questions answered)

I just needed a little direction to ensure I am starting down the correct 
path and following SAP standards best as possible. Just switching from 
standard ABAP to OO is a leap, so this helps a lot. Like most things, not 
really one simple answer. 

I know you folks are very busy and I really appreciate your assistance and 
patience. I will try not to misquote you folks. 

Rick Sample | SAP Workflow Analyst/Developer
11885 Lackland Road | Maryland Heights, MO 63146  | 
rick.sample at graybar.com 
www.graybar.com - Works to Your Advantage 

> -----Original Message-----
> From: sap-wug-bounces at mit.edu
> [mailto:sap-wug-bounces at mit.edu] On
> Behalf Of Dart, Jocelyn
> Sent: Thursday, February 10, 2011 6:06
> PM
> To: SAP Workflow Users' Group
> Subject: RE: ABAP Objects vs. BOR to
> trigger event?
> 
> Hi Rick,
> We regularly use your option 3 below
> where the config doesn't easily allow us to
> repoint to an ABAP class. Yes it's possible
> to write an event receiver function module
> to transform the object event to a class
> event but this takes some skill and you
> need to consider the risk of introducing
> event errors into your code.
> 
> SWEHR1/2/3 are fairly easy to work with
> as there are plenty of examples of the
> function module that shows how to adjust
> the event being raised.
> 
> Similarly change documents config very
> easily allows OO events to be raised.
> 
> But status mgt doesn't give an option for
> OO :-( and most of the other special event
> config doesn't consider it.
> 
> Of course if you are raising events from
> your own code or user exit ABAP OO
> event raise is easy enough.
> 
> Regards,
> Jocelyn
> 
> 
> __________________________________
> ______
> From: sap-wug-bounces at mit.edu [sap-
> wug-bounces at mit.edu] On Behalf Of
> Sample, Rick [Rick.Sample at graybar.com]
> Sent: Friday, 11 February 2011 2:47 AM
> To: SAP Workflow Users' Group
> Subject: RE: ABAP Objects vs. BOR to
> trigger event?
> 
> Hi Jocelyn, Mike and Mike,
> 
> No real hurry on this project, learning
> thing. I want to be as forward thinking as
> practical and possible and follow best
> practices.
> So Little clarification please. (I am ordering
> the 2nd addition. will need that for others
> anyway)
> 
> Like most shops, we have many existing
> WFs in BOR and little in the way of OO
> staffing. So, ABAP Objects must coexist
> with BOR.  Rewrite where needed, leave
> rest alone until business reason dictates
> re-write.
> 
> If I use the BOR objects only for GOS, I
> need clarification on where to plug these
> in.
> 1. Event Receiver (from a BOR event) and
> create my ABAP event to trigger. We have
> high volume, so this may not be good for
> us.
> 
> 2. SAP Config (as stated in something I
> read, was not really ready yet?)  SWEC?
> Add my ABAP Objects onChange, Create,
> Delete?
> 
> 3. My prior post, which no one seemed to
> like, GET_INSTANCE after BOR event
> triggered and WF started.
> 
> I am flexible at this point. Learning prj and
> would like to conform to best practices.
> The OO to WF hurdle is still a learning
> thing, so I have a bit of time to make
> changes.
> 
> Thanks much folks and Best Regards,
> Rick
> 
> > -----Original Message-----
> > From: sap-wug-bounces at mit.edu
> > [mailto:sap-wug-bounces at mit.edu] On
> > Behalf Of Dart, Jocelyn
> > Sent: Wednesday, February 09, 2011
> > 11:52 PM
> > To: 'SAP Workflow Users' Group'
> > Subject: RE: ABAP Objects vs. BOR to
> > trigger event?
> >
> > Hi Rick,
> > Just FYI.
> > On my sites, we actually always use the
> opposite approach i.e. use the
> > class for everything and just use the
> BOR for events/GOS.
> > I did have one site use the event
> receiver fm to convert a bor event
> > to an OO event at runtime - so it does
> work but we haven't bothered
> > with this again.
> > The overhead of instantiating a class is
> usually pretty minimal  and
> > so often you need to recode the bor
> object anyway ,e.g. because
> > there's some unwanted auth check or
> awkward formatting anyway.
> >
> > It gets away from having to teach
> > developers BOR coding at all.
> > Regards,
> > Jocelyn
> >
> > -----Original Message-----
> > From: sap-wug-bounces at mit.edu
> > [mailto:sap-wug-bounces at mit.edu] On
> > Behalf Of Sample, Rick
> > Sent: Thursday, February 10, 2011 6:25
> AM
> > To: SAP Workflow Users' Group
> > Subject: RE: ABAP Objects vs. BOR to
> > trigger event?
> >
> > Mike P / Mike GT,
> >
> > Forgot about the need for BOR to use
> > GOS.
> >
> > The need for BOR to use GOS is a big
> > one for determining my approach to this
> low priority prj. This is a
> > re-write of one of our first WFs (newbie
> code, patches galore, etc.)
> > so would like to look forward as far as
> possible, but grey areas to be
> > figured out by SAP at a later time, I will
> just avoid for now.
> >
> > Replacement for BOR-GOS or
> > coexistence of ABAP Objects-GOS?
> Time
> > line? SAP plan?
> >
> > I need BOR to use GOS, so I think I will
> simply continue to use BOR
> > for all the events, links, etc. and add in
> only new ABAP Object code
> > where required. I can already just
> instantiate the object or as you
> > stated below.
> >
> > This seems like the simplest approach to
> me. This sounds like what
> > most will be required to do anyway
> unless a complete custom app with
> > all its own events, etc.
> > etc. Yes?
> >
> > Thanks,
> > Rick
> >
> >
> > > -----Original Message-----
> > > From: sap-wug-bounces at mit.edu
> > > [mailto:sap-wug-bounces at mit.edu]
> On
> > > Behalf Of Mike Pokraka
> > > Sent: Wednesday, February 09, 2011
> > > 11:27 AM
> > > To: SAP Workflow Users' Group
> > > Subject: RE: ABAP Objects vs. BOR
> to trigger event?
> > >
> > > Hi Rick,
> > >
> > > Yes it is unfortunately necessary to
> have
> > both in most cases.
> > > Sometimes I just have the BOR in the
> > WF container purely so the
> > > workflow is visible from GOS. There
> are
> > ways around that too but some
> > > things aren't always worth the effort.
> > >
> > > A couple of ways around the
> > instantiation:
> > > 1.  An event replicator. The BOR
> event
> > receiver in SWETYPV is a method
> > > that looks at the BOR event and
> raises
> > the clas event which starts the
> > > workflow. Not suitable for high-volume
> > processes.
> > > 2. First prize is always to raise a class
> > event in first place. If
> > > using change docs or the likes you're
> all
> > set.
> > > 3. Create class instance in WF. This is
> > what you have done, but far
> > > less performance overhead is via a
> > static GET_INSTANCE functional
> > > method on the
> > > class: this can then be called in a
> > > conatiner operation step or even in a
> binding of the first step that
> > > needs it.
> > >
> > > This is all explained in the second
> edition
> > of the WF book. Author's
> > > prceeds go to charity so this is not
> > advertising :-)
> > >
> > > Cheers,
> > > Mike
> > >
> > >
> > > On Wed, February 9, 2011 4:39 pm,
> > > Sample, Rick wrote:
> > > > Note: I added a hack. I catch the
> BOR
> > > Created event, then in
> > > > background task, call a
> > > CREATE_INSTANCE method to
> > populate
> > > the ABAP
> > > > objects instance, but this seems a
> little
> > > bit of a kludge way to do it.
> > > >
> > > >
> > > >
> > > >> -----Original Message-----
> > > >
> > > >> From: sap-wug-bounces at mit.edu
> > > >
> > > >> [mailto:sap-wug-bounces at mit.edu]
> > On
> > > >
> > > >> Behalf Of Sample, Rick
> > > >
> > > >> Sent: Wednesday, February 09,
> > 2011
> > > >
> > > >> 10:14 AM
> > > >
> > > >> To: SAP Workflow Users' Group
> > > >
> > > >> Subject: ABAP Objects vs BOR to
> > > trigger
> > > >
> > > >> event?
> > > >
> > > >>
> > > >
> > > >> Hi all,
> > > >
> > > >>
> > > >
> > > >> I am playing around with a WF
> using
> > > >
> > > >> ABAP Objects. I built the object,
> wf,
> > > some
> > > >
> > > >> tasks, and all seems to be going
> fine.
> > > >
> > > >>
> > > >
> > > >> The WF will be based on Sales
> > > >
> > > >> (BUS2032). I will obviously need to
> > run
> > > >
> > > >> both BOR and ABAP objects to
> > trigger
> > > the
> > > >
> > > >> CREATE, CHANGED, etc. events.
> > > When
> > > >
> > > >> BUS2032.CREATE triggers, how to
> I
> > > also
> > > >
> > > >> trigger ABAP Objects?
> > > >
> > > >>
> > > >
> > > >> What is the "Best practices" to run
> > side
> > > by
> > > >
> > > >> side? I have several PDFs, but do
> > not
> > > see
> > > >
> > > >> this addressed.
> > > >
> > > >>
> > > >
> > > >> Thanks,
> > > >
> > > >> Rick
> > > >
> > > >>
> > > >
> > > >>
> > >
> >
> __________________________________
> > > >
> > > >> _____________
> > > >
> > > >> SAP-WUG mailing list
> > > >
> > > >> SAP-WUG at mit.edu
> > > >
> > > >>
> > >
> >
> http://mailman.mit.edu/mailman/listinfo/sap
> > > >
> > > >> -wug
> > > >
> > >
> >
> __________________________________
> > > _____________
> > > > SAP-WUG mailing list
> > > > SAP-WUG at mit.edu
> > > >
> > >
> >
> http://mailman.mit.edu/mailman/listinfo/sap
> > > -wug
> > > >
> > >
> > >
> > >
> >
> __________________________________
> > > _____________
> > > SAP-WUG mailing list
> > > SAP-WUG at mit.edu
> > >
> >
> http://mailman.mit.edu/mailman/listinfo/sap
> > > -wug
> >
> >
> __________________________________
> > _____________
> > SAP-WUG mailing list
> > SAP-WUG at mit.edu
> >
> http://mailman.mit.edu/mailman/listinfo/sap
> > -wug
> >
> >
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> > SAP-WUG mailing list
> > SAP-WUG at mit.edu
> >
> http://mailman.mit.edu/mailman/listinfo/sap
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> 
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