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pauillac
PostPosted: Wed Jul 25, 2001 11:49 pm    Post subject: Reply with quote

Novice

Joined: 13 Jul 2001
Posts: 21

I am investigating MQSI reusability. I came up with an interesting situation goes like this:

Suppose I have 4 identical message flows deployed to 4 execution groups. The reason why I would like to do this is I want to set up 1 message flow for each of 4 sub-systems. e.g. Global Finance, Securities, Accounting, Reporting. It so happens that all sub-systems share the same message flow when the version 1.0 of my system is rolled out. As my sub-systems evolve, they need different flavours of the same message flow. If all changes are unique to just 1 message flow I can change any message flow independently without affecting others. However, when some changes are sharable among, say, 3 of them, is there any way of making changes to just 1 place, be it a node or message flow, so that it can take effect on all the 3 message flows.

The reusable unit in MQSI is message flow, i.e. you can join message flows into a mega message flow. Since I don't know which node will be changed, should I convert all nodes in the message flow deployed in the above case into single node message flows, i.e. a single node with output and input terminals as a message flow on its own, so that I can change just 1 such single node message flow to have the change propagated to all the 3?

This is a trivial situation. If the system has 1000 message flows, it's really not a joke.
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kolban
PostPosted: Thu Jul 26, 2001 6:23 am    Post subject: Reply with quote

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Joined: 22 May 2001
Posts: 1072
Location: Fort Worth, TX, USA

Good question. The answer is "sub-flows". When you create a message flow, that message flow can itself be incorporated in other message flows. You can then think of the original sub-flow as a subroutine or function. You can even externalize parameters (properties) of the sub-flow so that each instance has different characteristics. This then gives you excellent re-use of business flows at whichever granularity you wish.
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