CA Compress/2 › Using CA Compress/2 Under CICS › Install the Callable SHRINK Subroutines for CICS

Install the Callable SHRINK Subroutines for CICS

CA Compress, because it fully supports data sets within a CICS region, replaced these SHRINK subroutines. In the past, CA Compress provided compression functions in CICS environments by calling these subroutines. Now, only the rarest circumstances justify their use. If you must use them, complete the steps in this section to call the SHRINK subroutines directly from programs running under CICS. Except as otherwise noted, all members referenced are in the YOUR.CAI.CCVBSAMP library.

• Set the CWASHRK value in member SHRKWORD to point to a reserved fullword in the CWA. Change the member FDTNAMES to list the FDTs to be used.
• Assemble and link edit CA Compress/2 source modules. Modify and use the JCL MEMBER INSTALL in the CICS CA Compress/2 source library.
• Modify the CICS tables appropriately. Do both items below:
  • Define the SHRNKMOD and SHRKSCBS modules and all FDT modules to be used in the CICS Processing Program Table (PPT).
  • Define SHRNKMOD in the CICS Program List Table (PLT).
• Modify the application programs calling SHRINK/2 CICS subroutines and link edit them with the SHRKCICS module.

These steps are described in the following section.