CICS interface to JES

CICS® provides a programming interface to JES (the Job Entry Subsystem component of MVS™) that allows CICS applications to create and retrieve spool files. Spool files are managed by JES and are used to buffer output directed to low-speed peripheral devices (printers, punches, and plotters) between the job that creates them and actual processing by the device. Input files from card readers are also spool files and serve as buffers between the device and the jobs that use the data.

The interface consists of five commands:

"Input" and "output" here refer to the CICS point of view here; what is spool output to one job is always spool input to another job or JES program.

These commands can be used with either the JES2 or JES3 form of JES, although some restrictions apply to each (see Spool interface restrictions). The term JES refers to both. You can support the requirements of other products to exchange files with other systems connected through a JES remote spooling communications subsystem (RSCS) network.

You can use the spool commands to do the following types of things:

This chapter describes:

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