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CICS Asynchronous API Fetch Child Example

This project is a very basic example demonstrating the passing of information from a parent to a child program using the CICS Asynchronous API, written in C. A longer form description of the example can be found on the CICS Developer Center.

Overview

The project consists of two programs: a parent program, and a child program (run by the parent).

The parent reads an integer from a 3270 terminal screen, and passes this value to its child. The child---running asynchronously with the parent---takes this value and increments it by 1, before passing it back to the parent. These values are output to CEEOUT.

Example

Assuming the following definitions in a CICS region's CSD:

DEFINE PROGRAM(ASPARENT) GROUP(AS) STATUS(ENABLED)
DEFINE TRANSACTION(ASPA) GROUP(AS) PROGRAM(ASPARENT)

DEFINE PROGRAM(ASCHILD) GROUP(AS) STATUS(ENABLED)
DEFINE TRANSACTION(ASCH) GROUP(AS) PROGRAM(ASCHILD)

the parent program is invoked with transaction ASPA, and will call the named child transaction. Pass an integer after it too. From a CICS terminal, run:

ASPA ASCH 9

Checking CEEOUT for the region running these programs, we see the following messages printed:

ASPARENT: sending 9
ASCHILD:  incremented number
ASPARENT: received 10

License

This project is licensed under Apache License Version 2.0.