Abstract for MVS Programming JES Common Coupling Services

Purpose of this information

This document provides MVS base control program (BCP) and job entry subsystem (JES) system programmers with guidance and reference information about the macros and exits that allow an installation to customize its use of the JES common coupling services component of MVS. JES members in an MVS sysplex environment can use the macros to send and receive messages, and can use the exits to monitor or tailor messages and status.

JES2 uses the common coupling component for checkpoint reconfiguration processing, and JES3 uses the component as a replacement for its multi-system communication mechanism.

Who should read this information

This document is intended for MVS BCP, JES2, or JES3 system programmers or for anyone responsible for tailoring an installation's use of the JES common coupling services (JES XCF) component.

If you modify JES2 and JES3 processing through JES XCF, make those changes in JES standard exits and JES3 DSPs using assembler language programming. Assembler language programming is described in the following documents:

HLASM Language Reference, SC26-4940
HLASM Programmer's Guide, SC26-4941

How to use this information

This document provides the information you need to:

Use the macro interface to:
- Attach and detach a JES common coupling services (JES XCF) group
- Create, clear, and delete mailboxes
- Send, receive, and acknowledge receipt of messages
- Obtain JES2 multi-access spool configuration and JES3 complex member information.
Use the exits to:
- Attach/detach a JES XCF group
- Allocate and initialize an installation data area
- View, modify, or reroute a message prior to sending
- View or modify a message prior to receiving.

Where to find more information

Where necessary, this document references information in other documents, using shortened version of the document title. For complete titles and order numbers of the documents for all products that are part of z/OS, see z/OS Information Roadmap.