MQSeries.net :: View topic - fail to print the MQMD contents from router exit

nilendu · Posted: Wed Sep 20, 2006 3:08 am Post subject:

Hi All,

I have written a message router exit.
The structure MQPXP that is passed to the exit funtion is PMQMD or pointer to the MQMD structure.

I would like to print the contents of the MQMD structure.
I could successfully print the variables of type long or integer, but failed to print the char/unsigned char variables.

for e.g:

following variables could be printed successfully:

MQLONG Offset; /* Offset of data in physical message from start of logical message */
MQLONG MsgFlags; /* Message flags */
MQLONG OriginalLength; /* Length of original message */

But couldnt print the these variables:

MQCHAR48 ReplyToQ; /* Name of reply queue */
MQCHAR48 ReplyToQMgr; /* Name of reply queue manager */
MQCHAR12 UserIdentifier; /* User identifier */
MQBYTE24 MsgId; /* Message identifier */

On using memcopy or strcpy to copy the content of the struct to a local variable, I get an access violation error 'amqfcxba.exe has encountered a problem and need to close....'
And a blank values is returned if we try to print the contents directly:

fprintf(fp,"ReplyToQ %s",pExitParm->MsgDescPtr->ReplyToQ);

Surprisingly I could print the 'char' variables that are part of the MQPXP
structure.

i.e I could print the value of 'DestinationQMgrName' from the below struct but not 'PutDate'

struct MQPXP {
.....
MQCHAR48 DestinationQMgrName;
PMQMD MsgDescPtr;
.....

}

struct MQMD {
....
MQCHAR8 PutDate;
....
}

Here is my exit code

void MQENTRY RoutingExit(PMQPXP pExitParm)
{

MQCHAR48 ReplyToQ;

strcpy(ReplyToQ,pExitParm->MsgDescPtr->ReplyToQ); //VIOLATION

memcpy(ReplyToQ,pExitParm->MsgDescPtr->ReplyToQ,sizeof(MQCHAR48));

fp =fopen("C:\\MESSAGEEXIT.TXT","w");

fprintf(fp,"ReplyToQ %s",ReplyToQ);

fprintf(fp,"DestinationQMgrName %s",pExitParm->DestinationQMgrName); /// PRINTED SUCCESSFULLY

fclose(fp);

}

Has anyone tried to print the contents of the MQPXP struct?
What am I doing wrong?
Please advice...

thanks and regards,
Nilendu