Depending on your installation's needs, you can use the JES common coupling services component to affect JES message processing through several methods. Use JES XCF macros, JES XCF exits, or standard JES exits and JES3 DSPs to affect message processing to meet your installation's needs. The services provide the following options:

• You can send and receive installation messages using the JES common coupling services macros. These macros can be invoked from standard JES2 and JES3 installation exits and from JES3 DSPs. Refer to z/OS JES2 Installation Exits or z/OS JES3 Customization for JES2 and JES3 exit information and coding requirements, respectively.
• You can view and modify all messages handled by JES XCF using the transport exit and the receive exit. These exits are invoked by JES XCF to process both system messages and installation-defined messages.

The use of these services is optional. Depending on your installation requirements you can:

• Use neither the macros nor the installation exits provided by JES XCF.
• Use the macros provided by JES XCF to send and receive installation messages in standard JES exits and JES3 DSPs.
• View and monitor IBM messages using the transport and receive installation exits. This does not require your use of the macros. Refer to Coding the JES XCF exits for a description of the exits.
• Use the JES XCF macros to send and receive installation messages from standard JES exits and JES3 DSPs, and use the JES XCF exits to view or modify all messages handled by JES XCF.