MQSeries.net :: View topic

nathanw · Posted: Tue May 17, 2005 8:20 am Post subject:

Hey all had a query from a client

Tell me what you think

----

The scenario is as follows:

1. We have a main flow that uses a subflow

2. The same subflow is used in lots of main flows, its purpose is to write
debug information to a trace file

3. The subflow contains a trace node with two promoted properties that
specify the filename to write to, and the contents of the trace (for
example the message root)

4. We start with everything running happily on the Broker

5. In the Message Broker Toolkit, we make a small change to the subflow -
for example, we slightly move the position of a node in the graphical view
of the flow. This change does not alter anything significant about the
flow, and it does not alter the functionality of the flow in any way.

6. The Message Broker Toolkit registers that a change has been made, so we
click on Save

7. If we then open up the main flow, the contents of the promoted
properties from the subflow have disappeared, although we have not touched
the main flow in any way.

My first question is, if the contents of the promoted properties are stored
against the main flow (I presume they are) then why should the contents be
cleared out if you change the subflow? We have not touched the promoted
properties at all.

So carrying on,

8. If you then deploy the main flow to the Broker, strangely enough
everything still works as normal

9. So we then make a similar minimal change to the main flow - we don't
touch the promoted properties at all - we then save the changes in Broker
Toolkit

10. We deploy the main flow to the Broker again. This time round, the
trace file will not be produced because the contents of the promoted
properties have disappeared from the Broker and it doesn't have a filename
to write to

This could cause us some problems in future if we need to alter one of
these subflows that have promoted properties. We can make changes in our
development procedures to get around the problem, but we would still like
an explanation because on the face of it, it appears to be a bug.

-------

So my next question is, do you consider this to be a bug?

Your thoughts