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fjb_saper
PostPosted: Thu Oct 04, 2007 3:02 pm    Post subject: Reply with quote

Grand High Poobah

Joined: 18 Nov 2003
Posts: 20767
Location: LI,NY
fjb_saper wrote:
Apparently you suffer from an Affinity problem.
Before processing the message you will need to check the timestamp and compare to the latest update...
If the timestamp of current message < latest update discard...

Which means that you cannot send a delta of the object unless you do that check for all fields in the object...

Enjoy

So you guys out there really think you want to create a DB with each field and a timestamp for each field?

Because having a timestamp for each field is the only way to process / reprocess messages with a delta update...

I'd say if the object is not too heavy, send out the full object on each change...

Alternatively you can do the same thing as SAP... guarantee a FIFO delivery and stop processing if there is a problem. Only resume processing after the problem was fixed. And remember to use only persistent messages and linear logging as you cannot afford to loose any messages...

And remember message affinity => single thread processing in a single execution group...
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