It publishes input files either by polling for them or by using a trigger subject to determine which input files to accept. The polling and trigger-subject methods can operate together. If files are being published and trigger messages to publish are received, the Adapter queues the files and publishes what is in the queue after the current file. A trigger-subject file takes precedence over a polling-method file.
You must identify which data sets contain the file(s) that you want to publish. You can use the Options section of the configuration file to identify a default input data set, process data set, and output data set. In addition, you can specify and override an input data set, a process data set, or an output data set for each file type in the configuration file.
Files can be read or written in block transfer mode or in record mode. Block transfer mode means that the file is read in blocks without regard to its record or field structure. The blocks of data are published and must be subscribed to in block transfer mode as well.
Adapter for Files z/OS supports both fixed-block (FB) and variable-block (VB) files. File attributes are obtained by the catalog lookup service embedded in the Adapter.