SYSTEM AND METHOD FOR TRANSACTIONAL CACHE

• US 20090198899A1
• Filed: 01/30/2009
• Published: 08/06/2009
• Est. Priority Date: 01/31/2008
• Status: Active Grant

• Current Assignee: Oracle International Corporation (Oracle Corporation)
• Original Assignee: BEA Systems Incorporated (Oracle Corporation)
• Inventors: Revanuru, Naresh
• Granted Patent: US 8,019,945 B2
• Time in Patent Office: Days
• US Class Current: 711/128
• CPC Class Codes: G06F 12/0811 with multilevel cache hierarchies
• CPC Class Codes: G06F 12/0842 for multiprocessing or multitasking
• CPC Class Codes: G06F 12/0848 Partitioned cache, e.g. separate instruction and operand caches

Abstract

A computer-implemented method and system to support transactional caching service comprises configuring a transactional cache that are associated with one or more transactions and one or more work spaces; maintaining an internal mapping between the one or more transactions and the one or more work spaces in a transactional decorator; getting a transaction with one or more operations; using the internal mapping in the transactional decorator to find a work space for the transaction; and applying the one or more operations of the transaction to the workspace associated with the transaction.

Claims

1. A computer-implemented method to support transactional caching service, comprising:

configuring a transactional cache that is associated with one or more transactions and one or more work spaces;

maintaining an internal mapping between the one or more transactions and the one or more work spaces in a transactional decorator;

receiving a transaction with one or more operations;

using the internal mapping in the transactional decorator to find a work space for the transaction; and

applying the one or more operations of the transaction to the workspace associated with the transaction.

2. The method of claim 1, wherein:

the transactional cache is configured using an isolation level.

3. The method of claim 1, further comprising:

obtaining locks on affected entries based on a configured isolation level for a pessimistic transaction.

4. The method of claim 1, further comprising:

recording versions of affected entries.

5. The method of claim 1, further comprising:

initiating a transaction completion process when a user issues a commit or rollback, or when current transaction ends.

6. The method of claim 5, wherein:

the transaction completion process uses the standard synchronization call backs beforeCompletion and afterCompletion.

7. The method of claim 1, further comprising:

grouping a set of cached objects to enable complex event processing, wherein cache actions are automatically performed on related objects in the set of cached objects.

8. The method of claim 1, further comprising:

updating cache objects only at the end of a session.

9. The method of claim 1, further comprising:

creating the transactional cache from a Cache Manager.

10. The method of claim 1, further comprising:

the transactional cache is capable of self loading.

11. The method of claim 1, wherein:

the transactional cache uses a pluggable message transport to communicate with one or more distributed caches that span over one or more Virtual Machine (VM) instances.

12. The method of claim 1, further comprising:

updating and/or querying a second cache in the transactional cache with respect to updating and/or querying of a first cache in the transactional cache via a forward strategy and/or a listening scheme.

13. The method of claim 1, further comprising:

storing one or more mutable cache objects, wherein each one of the one or more mutable cache objects is reachable via one or more retrieval paths of one or more cached object graph; and

maintaining an internal instance map that transparently translates between the one or more cached object graphs and the one or more mutable cache objects stored in the cache space.

14. A computer-implemented system to support transactional caching service, comprising:

a transaction cache that associated with one or more transactions and one or more work spaces;

a transaction decorator to

maintain an internal mapping between the one or more transactions and the one or more work spaces in a transactional decorator;

get a transaction with one or more operations;

use the internal mapping in the transactional decorator to find a work space for the transaction; and

apply the one or more operations of the transaction to the workspace associated with the transaction.

15. A computer readable medium including instructions stored thereon, which when executed cause the computer to perform the steps of:

configuring a transactional cache that is associated with one or more transactions and one or more work spaces;

maintaining an internal mapping between the one or more transactions and the one or more work spaces in a transactional decorator;

receiving a transaction with one or more operations;

using the internal mapping in the transactional decorator to find a work space for the transaction; and

applying the one or more operations of the transaction to the workspace associated with the transaction.