Method and apparatus for enabling a persistent metastate for obj

Details Method and apparatus for enabling a persistent metastate for obj Method and apparatus for enabling a persistent metastate for obj

1996-03-20

1999-02-09

Black, Thomas G.

Data processing: database and file management or data structures

Database design

Data structure types

707 10, 707102, 707 2, 39520031, 39520047, 711172, G06F 1730

Patent

active

058707530

ABSTRACT:
A method and apparatus for enabling the maintenance of multiple metastates for a persistent object without increasing the size of the object reference. An object reference data structure is provided in memory and persistent storage to carry a key which contains a universal unique identification (UUID) of an object and other generic common information of the object. A table, maintained by a server process in memory and persistent storage, contains tuples consisting of a key and metastates for persistent objects. A technique is also provided for interacting with the object for the exchange of metastate and the handling of lifecycle issues such as object creation, passivation (removing from memory), reactivation (restoring to memory) and destruction. Additional types of metastates may be added without reimplementation of the server which manages the persistent objects.

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