tablesONLINE/CICS system exits

System-level exits are used to provide an opportunity for special user validation and to set system defaults.

These are not the same as tableBASE System or User Exits.

For the system sign-on exits, SIB and SIA, tablesONLINE/CICS system initialization has not been completed. Message stacks, for example, are not yet established, so standard tablesONLINE/CICS message processing is unavailable. In the case of SIB, the exit, which is specified in TBOLCNST, controls the access to tablesONLINE/CICS. The SIA exit occurs after TBOLACT application control processing is completed; this exit can be used to perform tracking of user-specific usage of tablesONLINE/CICS. Setting the BYPASS-ACTION-IND to Y or E prevents a user from accessing tablesONLINE/CICS.

For the System sign off exits, SOB and SOA, tablesONLINE/CICS system initialization has been completed. The SOB is the logical counterpart to the SIA exit. If a timer was activated at the SIA exit, here would be the place to inspect the timer and record if so desired. Setting the BYPASS-ACTION-IND at this time has no effect.