MQ_PUBLISH_EXIT - Publish exit

MQ_PUBLISH_EXIT - Publish exit

The MQ_PUBLISH_EXIT call can inspect and alter messages delivered to subscribers.

Purpose

Use the publish exit to inspect and alter messages delivered to subscribers:

Examine the contents of a message published to each subscriber
Modify the contents of a message published to each subscriber
Alter the queue to which a message is put
Stop the delivery of a message to a subscriber

This exit is not available on IBM MQ for z/OS®.

Syntax
MQ_PUBLISH_EXIT (ExitParms, PubContext, SubContext)

Parameters

ExitParms (MQPSXP)- Input/Output

ExitParms contains information about the invocation of the exit.

PubContext (MQPBC) - Input

PubContext contains contextual information about the publisher of the publication.

SubContext (MQSBC) - Input/Output

SubContext contains contextual information about the subscriber receiving the publication.

MQPSXP - Publish exit data structure
The MQPSXP structure describes the information that is passed to and returned from the publish exit.
MQPBC - Publication context data structure
The MQPBC structure contains the contextual information, relating to the publisher of the publication, that is passed to the publish exit.
MQSBC - Subscription context data structure
The MQSBC structure contains the contextual information, relating to the subscriber that is receiving the publication, that is passed to the publish exit.
Parent topic: User exits, API exits, and installable services reference