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System extensions and user-exit programs

 

A facility is provided in the channel definition to allow extra programs to be run at defined times during the processing of messages. These programs are not supplied with WebSphere MQ for iSeries, but may be provided by each installation according to local requirements.

In order to run, such programs must have predefined names and be available on call to the channel programs. The names of the exit programs are included in the message channel definitions.

There is a defined control block interface for handing over control to these programs, and for handling the return of control from these programs.

The precise places where these programs are called, and details of control blocks and names, are to be found in Further intercommunication considerations.

 

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