IMS services available to the ESAP

IMS provides exit routines that an external subsystem can activate to access certain IMS system services.

The external subsystem can:
  • Request that a connection be initiated (Subsystem Startup Service).
  • Request that connections be quiesced (Subsystem Termination Service).
  • Have a log record written to the IMS log (Log Service).
  • Have a message sent to an IMS destination (Message Service).