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simon.starkie · Posted: Fri Aug 23, 2002 11:25 pm Post subject:

Hi,

We use PostitApply to simulate a shared memory object which contains global values that our message flows need to use often.

We use PostitApply to determine if a particular Postit object name already exists and if not, we use PostitCreate to create one.

Each message flow calls a common subflow to do this PostitApply check in order to make sure that the first message coming through message flows for a particular execution group causes the Postit shared memory object to be instantiated. In retrospect, there may have been a better design, like not starting any message flows until a single "init" message flow has built the Postit object for all execution groups (one init per group, only executed once at startup time much as a servlet engine would do it...).

At any rate, we have found that PostitApply slows down our message flows from 50 milliseconds to 100 milliseconds or more.

If we wire around the PostitApply, the performance improves back to 50 milliseconds.

The options we use for PostitApply are:
NodeType=PostitApply
PostitName=Broker
CopyDataTo=Root.WKSPACE.CIB
MatchOn=All Messages
PostitScope=ExecutionGroup
Description=blah blah

Does anyone know of an alternative to using PostitApply to check for the existence of a particular Postit object?

Does anyone know of a way we can do accomplish the same check a little more efficiently. For example, check a Root field for null?

Cheers