System and method for transactional cache

• US 8,019,945 B2
• Filed: 01/30/2009
• Issued: 09/13/2011
• Est. Priority Date: 01/31/2008
• Status: Active Grant

• Current Assignee: Oracle International Corporation (Oracle Corporation)
• Original Assignee: Oracle International Corporation (Oracle Corporation)
• Inventors: Revanuru, Naresh
• Primary Examiner(s): Verbrugge; Kevin
• Application Number:
  US12/363,648
• Publication Number:
  US 20090198899A1
• Time in Patent Office: 956 Days
• Field of Search: None
• US Class Current: 711/118
• 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:

associating a transactional decorator with a transactional cache, wherein the transactional decorator maintains a mapping between a plurality of transactions and a plurality of workspaces, and wherein each said workspace contains data used in a transaction of the plurality of transactions;

receiving a request to perform one or more operations associated with a transaction of the plurality of transactions at the transactional decorator;

using the mapping in the transactional decorator to find a workspace associated with the transaction; and

applying the one or more operations associated with 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 data used in a transaction in the plurality of transactions based on a configured isolation level for the transaction, if the transaction is a pessimistic transaction.

4. The method of claim 1, further comprising:

recording versions of data used in a transaction in the plurality of transactions, if the transaction is an optimistic transaction.

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 synchronization call backs beforeCompletion and afterCompletion.

7. The method of claim 1, further comprising:

grouping a set of cached objects to enable 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 component.

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 message transport component 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.

15. The method of claim 1, further comprising:

merging data in the workspace into the transactional cache upon the transaction is successfully committed.

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

associating a transactional decorator with a transactional cache, wherein the transactional decorator maintains a mapping between a plurality of transactions and a plurality of workspaces, and wherein each said workspace contains data used in a transaction of the plurality of transactions;

receiving a request to perform one or more operations associated with a transaction of the plurality of transactions at the transactional decorator;

using the mapping in the transactional decorator to find a workspace associated with the transaction; and

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

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

one or more microprocessors;

a transaction decorator which runs on the one or more microprocessors and is associated with a transaction cache, wherein the transaction decorator operates to perform the steps of

associating a transactional decorator with a transactional cache, wherein the transactional decorator maintains a mapping between a plurality of transactions and a plurality of workspaces, and wherein each said workspace contains data used in a transaction of the plurality of transactions;

receiving a request to perform one or more operations associated with a transaction of the plurality of transactions at the transactional decorator;

using the mapping in the transactional decorator to find a workspace associated with the transaction; and

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