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| Message Set design - is there a way to ignore new fields? |
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| mqjeff |
 Posted: Fri Aug 24, 2012 11:21 am Post subject: |
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Grand Master
Joined: 25 Jun 2008
Posts: 17447
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| NealM wrote: |
| you know something has changed, create a warning message (email, trace, whatever) so that a developer is alerted that it's time to change AA again. |
Well, yeah, but proper change management should have made sure that the developer was alerted that it was time to change AA again before the sending app's change went into UAT. |
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| kimbert |
| Posted: Fri Aug 24, 2012 12:30 pm Post subject: |
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Jedi Council
Joined: 29 Jul 2003
Posts: 5542
Location: Southampton
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If proper change control cannot be implemented, then this is the most useful piece of advice that has been posted on this thread so far:
| Quote: |
There's no single method that can be chosen that can accommodate all of those potential changes.
There's no single method that can be chosen to resolve all possible forms of ONE of those potential changes.
If specific detail is given about the specific message being modified - INCLUDING detail about how parts are identified (fixed length, tagged/fixed length, delimited, etc. etc. etc.), and specific detail is given about which type of change is generally being made, then a meaningful suggestion can be made. |
That last paragraph is very, very important. I am surprised that experienced people on this forum are making *any* recommendations yet - the some of the key requirements remain unknown to all but the OP. |
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| mqsiuser |
| Posted: Fri Aug 24, 2012 1:08 pm Post subject: |
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Yatiri
Joined: 15 Apr 2008
Posts: 637
Location: Germany
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Kimbert is right. Proposals can be more focused if detailed information is provided.
@OP: Pls post the (relevant) parts of your msg and current msg-set (and illustrate where the changes are to be expected).
I was just told once (by a trustworthy consultant) that "when it is not possible with TDS or CWF fixed length or delimited, then use reg exps"... which I did eversince (no problems with performance occuring from that (for me  )). |
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| dyson |
| Posted: Fri Aug 24, 2012 2:13 pm Post subject: |
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Apprentice
Joined: 04 Apr 2011
Posts: 45
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| Quote: |
| If so, you can alter the structure of the sequence containing the choice to include a variable length optional field at the end (call it FILLER or something). The unmodelled records will then be consumed by the FILLER. |
That worked by the way ... Done! |
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| mqjeff |
| Posted: Fri Aug 24, 2012 3:22 pm Post subject: |
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Grand Master
Joined: 25 Jun 2008
Posts: 17447
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| dyson wrote: |
| Quote: |
| If so, you can alter the structure of the sequence containing the choice to include a variable length optional field at the end (call it FILLER or something). The unmodelled records will then be consumed by the FILLER. |
That worked by the way ... Done! |
Since the comments that allowed this to be properly discussed are pushed back onto the previous page, I will elucidate a bit more here what had to be determined before any solution could be tested.
The model was specified as being tagged-delimited. The model was then specified as using the tags to resolve a choice (presumably the choice repeats). If the model was NOT using a choice, but instead using a sequence with fields in a fixed order, the solution given here would NOT work.
Because the choice resolves a single instance of an element, the choice allows each modeled field to be followed by some comparatively unmodeled 'stuff'. That 'stuff' consumes all of the records that were added since the last proper change of the model.
Again, we had to go into quite a bit of detail about the structure and methodology of the model before we could make a solution. |
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