How to Implement Message Processing with User-Defined Data

This section describes how user-defined data is used to automatically execute commands if an application issues a certain message.

Consider the following scenario:

• The HSM application issues the ARC0909E message that indicates the utilization percentage of the journal data set. You want to automate recovery of the HSM journal data set if it is more than 97% full. You therefore want SA z/OS to automatically issue two commands to HSM that will perform the recovery:
  • HOLD ALL: To stop all further activities for HSM.
  • BACKVOL CDS: To create a backup of the full journal data set and allocate a new one.

To implement this scenario, perform the steps described in the following sections.