The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Feb. 09, 1999
Filed:
Mar. 20, 1996
David Yu Chang, Austin, TX (US);
Robert Howard High, Jr, Round Rock, TX (US);
Russell Ley Newcombe, Round Rock, TX (US);
Ashvin Radiya, Austin, TX (US);
International Business Machines Corporation, Armonk, NY (US);
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.