Negotiable locks for concurrent access of control data by multip

Details Negotiable locks for concurrent access of control data by multip Negotiable locks for concurrent access of control data by multip

1993-10-14

1998-02-24

Bowler, Alyssa H.

395674, 395608, 395726, G06F 1500

Patent

active

057219435

ABSTRACT:
The control data locking protocol allows a concurrency control manager and data store to permit concurrent dynamic access between those creating or modifying control data and those using the data in their execution sessions. The invention applies to the use of production rules in inferencing sessions or to the use of ordered processing of flow rules by a workflow manager. The invention grants inference locks, read locks and write locks. Pre-lock notification with negotiation is implemented. Post-lock notification is also implemented. Those who are using the rules and those who are modifying them can specify whether changes should be incorporated immediately. In case two requested locks conflict, users resolve the conflict before both are granted. Controlled invocation of conversion processing converts session data as necessary to allow changes in control data to be made while the control data is being used in existing execution sessions.

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