Creating the user exit load library

CDC Replication can extend its capabilities to meet your special requirements by calling user exits that you provide. You can use these exits to modify the apply process, enhance processing within expressions and row filtering expressions, or implement additional channels for the notifications feature. CDC Replication executes in an APF-authorized address space, so it drives any user exits in an authorized environment. User exit load modules can be separated from the authorized CDC Replication load modules. If user exits are to be separated from the CDC Replication load modules, then you can allocate a separate user exits load library. This load library should have similar attributes to the <CHC.HCHCA21>.LOAD data set, including being APF authorized. Provide the name of the user exit load library to CDC Replication by substituting its name for the <UserExitLoadLib> placeholder in the CHCPROC sample JCL procedure.

Initial install—Using TSO/ISPF or batch JCL, allocate a user exit load library, and replace the <UserExitLoadLib> placeholder in the CHCPROC sample JCL with the name of the data set.

Upgrade—User exits that function with CDC Replication version 6.2 and higher will continue to function with version 11.4.0, however the older user exit interfaces are deprecated. New user exits should be written by using the currently documented methods and resources.