Question

In Put MQ API Exit (before or after) is there any way to get the name of the target queue (i.e. the queue against which “put” call has been invoked).

I tried inquiring on Hobj parameter, but got an error saying object has not been opened with Inquiry option (which is a valid possibility).

I also checked ResolvedQName field of pPutMsgOpts parameter, but that was blank.

Is there any other means of getting the target queue name? Any idea would be much appreciated.

Answer 1

The names of the resolved queue manager and resolved queue are returned in the object descriptor accessible during the MQXR_AFTER call for the PUT1 or the OPEN.

Have a look at the sample program `amqsaxe0.c and you will see the following function signatures:

MQ_OPEN_EXIT OpenAfter;

void MQENTRY OpenAfter   ( PMQAXP    pExitParms
                         , PMQAXC    pExitContext
                         , PMQHCONN  pHconn
                         , PPMQOD    ppObjDesc
                         , PMQLONG   pOptions
                         , PPMQHOBJ  ppHobj
                         , PMQLONG   pCompCode
                         , PMQLONG   pReason
                         )


MQ_PUT1_EXIT Put1After;

void MQENTRY Put1After   ( PMQAXP    pExitParms
                         , PMQAXC    pExitContext
                         , PMQHCONN  pHconn
                         , PPMQOD    ppObjDesc
                         , PPMQMD    ppMsgDesc
                         , PPMQPMO   ppPut1MsgOpts
                         , PMQLONG   pBufferLength
                         , PPMQVOID  ppBuffer
                         , PMQLONG   pCompCode
                         , PMQLONG   pReason
                         )

The object descriptor in the before call has the object name specified by the application. The same structure in the after call has the name of the QMgr and queue that were resolved during the call. Since the PUT1 performs the open, put and close in one step it must resolve the queue name. However in the case of separate open, put(, put…), close calls the name resolution occurs only once during the open.

Please see the samples in /var/mqm/samp or C:\Program Files (x86)\IBM\WebSphere MQ\tools\c\Samples for the amqsaxe0.c program.