Patent attributes
A system and methodology that facilitate persistence for an execution state is provided. The system and methodology employ generalized “idempotent” request(s) that have the property they only execute a request once, and always return the result of that first execution should the request be repeated so as to ensure exactly once execution. A calling middle tier component can exploit these procedures so that it can engage in exploratory reads (which are not idempotent) yet still be able to have their state recovered via replay based on the log at the client and the results retained by the generalized idempotent procedures provided by back end services. The system and methodology can be employed to facilitate successful replay of logless persistent component(s), (e.g., components that do not themselves log any information).
