Reference information for DFHWBBLI, CICS business logic interface

Attention: This topic contains Product-sensitive Programming Interface and Associated Guidance Information.

The business logic interface allows callers to specify what presentation logic is to be executed before and after a CICS® application program. It has two modes of operation:

Pointer mode: the input data for Decode is in storage allocated separately from the COMMAREA for the business logic interface. The COMMAREA contains a pointer (wbbl_data_ptr) to the input data for Decode. When the call to the business logic interface ends, the output from Encode is in storage allocated separately from the COMMAREA for the business logic interface, and the COMMAREA contains a pointer (wbbl_outdata_ptr) to the output from Encode.
Offset mode: the input data for Decode is part of the COMMAREA for the business logic interface. The COMMAREA contains the offset (wbbl_data_offset) of the input data for Decode. When the call to the business logic interface ends, the output from Encode is part of the COMMAREA for the business logic interface, and the COMMAREA contains the offset (wbbl_outdata_offset) of the output from Encode.

The caller of the business logic interface uses wbbl_mode to indicate which mode of operation is to be used.

For information about writing a converter for the business logic interface, see Writing a converter program.