Registering and deregistering interest in transactions

IMS registers or deregisters interest in transaction queues when certain actions are taken.

• IMS registers interest in transaction queues when any of the following events occurs:
  • IMS is initialized.
  • Transactions are added by online change after the /MODIFY COMMIT command is entered or, with global online change enabled, after the INITIATE OLC PHASE(COMMIT) command is entered.
  • An operator enters the /START TRAN command.
  • An operator enters the UPD TRAN START(SCHD) command.
  • IMS reconnects to CQS after CQS has terminated and been restarted.
• IMS deregisters interest in transaction queues when any of the following events occurs:
  • IMS shuts down.
  • Transactions are deleted by online change after the /MODIFY COMMIT command or, with global online change enabled, after the INITIATE OLC PHASE(COMMIT) command.
  • A /STOP TRAN command is entered.
  • A /PSTOP TRAN command is entered.
  • An UPD TRAN STOP(SCHD) command is entered.
• For IMS Fast Path:
  • IMS registers interest in a program queue during IFP region initialization for the name of the program that the region processes.
  • IMS deregisters interest in a program queue when the IFP region is terminated.