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| Design a synchronous message Flow |
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| anshuman861 |
 Posted: Wed Jun 07, 2023 10:37 pm Post subject: Design a synchronous message Flow |
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Newbie
Joined: 19 Oct 2022
Posts: 1
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I have a requirement where I will be getting a File as an input, and a message in a Queue as a 2nd input.
The requirement is to wait for both the messages to arrive and then start the processing. If the File arrives 1st, then I need to wait until the message arrives in the Queue, and then start the processing for both the inputs and vice-versa as well, if the message arrives in the Queue first, then I need to wait until the file arrives, and then start the processing.
There is no restriction on weather to do it in two different applications or in the same application.
Is there a way to achieve this. I tried reading some IBM documents but couldn't find anything useful. |
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| gbaddeley |
| Posted: Mon Jun 12, 2023 4:18 pm Post subject: |
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Jedi
Joined: 25 Mar 2003
Posts: 2495
Location: Melbourne, Australia
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What are the consequences if a file or a message never arrives? Or there is a significant delay between them? Or files and messages arrive out of order?
A possible approach is to put the files (or references to them) and the messages into a DB, using two separate flows. One of these flows, or a third flow, does a matching operation, and starts processing when it finds both pieces are present. There will also need to be some form of reconciliation, to flag files or messages that are missing the other piece after a period of time.
As you can see, this is quite messy, and makes a case for not having this requirement in the first place.
If the file and message is from the same source (or near to it), they should be combined into one message or one file. This removes the wait / reconciliation problem.
_________________
Glenn |
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