External Product Interface › OMMVS—Sample OMEGAMON Interface Routine › OMMVS Implementation

OMMVS Implementation

The following process discusses the OMMVS implementation.

• The OMMVS REXX program uses the ADDRESS EPI environment to do the following:
  • Define a virtual terminal
  • Enable it
  • Log it on to OMEGAMON/VTAM

  When a user wants to execute a sequence of commands, they are stacked in global variables (uniquely named for each address space) until an EXECUTE command is encountered.

• The OMEGAMON virtual terminal is then enqueued on exclusively and:
  • The commands are entered onto the screen.
  • Responses are scrolled through to retrieve all output, and are placed in the REXX external data queue.
  • The virtual terminal is dequeued after completion.
• The OMMVS program allows multiple users to issue commands using a single OMEGAMON virtual terminal. OMMVS takes care of the details of sharing the virtual terminal.