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ydsk · Posted: Mon Mar 19, 2007 1:06 am Post subject:

Hi,

We have more than 200 C/C++ Windows clients connecting to a single MQ qmgr on AIX.

All the clients do a PUT to a queue X, and then indefinitely wait and do a GET from the other queue Y on the AIX qmgr.

The same exact code runs on all the 200 + clients. I don't have any threading issues - all are single threaded.

I am looking for some guidance / samples on handling errors immediately after an API call , in fact after every MQ API call in the C/C++ client.

I think we first check for the Completion Code CC, and then the Reason Code RC after every API call.

Just before opening queue X, the OPEN OPTIONS we gave are:
MQOO_OUTPUT + MQOO_FAIL_IF_QUIESCING

Just before opening queue Y, the OPEN OPTIONS we gave are:
MQOO_INPUT_SHARED + MQOO_FAIL_IF_QUIESCING

After each of the MQOPEN calls above we are planning to do a check as follows:
if ( CC == MQCC_FAILED)
if (RC == ..... )

My questions are:
(1) Is it enough if I check for CC == MQCC_FAILED ?? Or do I need to check for any other completion codes ?
(2) What all RC values do I need to check ? I think there are too many of them, and I am not sure which ones to check for. Pls help.

Again, after the OPEN calls, we are doing a PUT to queue X without any explicit PutMessageOptions - using the defaults.

Later we are doing a GET from queue Y with these GetMessageOptions:
MQGMO_WAIT | MQGMO_FAIL_IF_QUIESCING

My questions here again are:
(3) Do I need to use any other PUT/GET message options here ?? I think it depends on the specific application but I am looking for some general guideline.
(4) Do I need to do the same error checking with CC and RC here ? Can somebody please suggest the different values of CC and RC for PUT / GET ?

Appreciate any links ( to any sections of Appl prog guide / reference ) or any other suggestions from your experience.

Thanks in advance.

regds,
ydsk.