System, method, apparatus and article of manufacture for identity-based caching (#15)

• US 6,154,742 A
• Filed: 07/01/1996
• Issued: 11/28/2000
• Est. Priority Date: 07/02/1996
• Status: Expired due to Term

• Current Assignee: Oracle America, Inc. (Oracle Corporation)
• Original Assignee: Sun Microsystems Incorporated (Oracle Corporation)
• Inventors: Herriot, Robert G.
• Primary Examiner(s): AMSBURY, WAYNE P
• Application Number:
  US08/675,237
• Time in Patent Office: 1,611 Days
• Field of Search: 395/60, 395/61, 395/62, 707/10, 707/103, 707/104
• US Class Current: 1/1
• CPC Class Codes: G06F 16/9574 of access to content, e.g. by caching
• CPC Class Codes: H04L 67/02 based on web technology, e.g. hypertext transfer protocol [HTTP]
• CPC Class Codes: H04L 67/56 Provisioning of proxy services store-and-forward switching systems in data switching networks H04L12/54
• CPC Class Codes: H04L 67/568 Storing data temporarily at an intermediate stage, e.g. caching
• CPC Class Codes: H04L 69/329 in the application layer [OSI layer 7]
• CPC Class Codes: H04L 9/40 Network security protocols
• CPC Class Codes: Y10S 707/99944 Object-oriented database structure
• CPC Class Codes: Y10S 707/99945 Object-oriented database structure processing

Abstract

A process for obtaining a copy of a data object is disclosed. A location-independent identifier associated with the desired data object is obtained, for example, from a primary file that requires a copy of the data object. Using the location-independent identifier associated with the desired object, a cache is interrogated to determine whether a copy of the data object is cached. If the data object is cached, a copy of the cached data object is obtained from the cache. If the data object is not cached, a network call is performed obtain a new copy of the data object.

Claims

1. A method for obtaining a copy of a data object, comprising the steps of:

a) obtaining a location-independent identifier for the data object from a primary file;

b) interrogating a cache using the location-independent identifier for the data object to determine whether the data object is cached; and

c) if the data object is cached, obtaining the copy of the data object.

2. The method as recited in claim 1, further comprising the step of:

d) if the data object is not cached, performing a network call to obtain the copy of the data object.

3. The method as recited in claim 1, in which steps (b) and (c) are performed by a client program.

4. The method as recited in claim 1, in which the location-independent identifier is an ASN.1 object identifier.

5. The method as recited in claim 1, in which the data object comprises logic and data.

6. The method as recited in claim 1, in which the data object is a computer program.

7. The method as recited in claim 1, in which the data object is a class object.

8. The method as recited in claim 1, in which the data object is a program subroutine.

9. The method as recited in claim 1 in which the data object is an image file.

10. The method as recited in claim 1 in which the data object is a text file.

11. The method as recited in claim 1 in which the data object is a multimedia file.

12. The method as recited in claim 1, in which the data object comprises an executable program segment.

13. The method as recited in claim 12, in which the executable program segment is in a platform-independent object code form.

14. An apparatus for obtaining a copy of a data object, the apparatus comprising:

(a) a computer and a cache;

(b) the cache being indexed by a cache table; and

(c) the computer being responsive to requests for the data object having a location-independent identifier, whereby the computer interrogates the cache using the location-independent identifier for the data object to determine whether the data object is cached, and if the data object is cached, obtains the copy of the data object from the cache.

15. The apparatus as recited in claim 14, whereby if the data object is not cached, the computer performs a network call to obtain the copy of the data object.

16. The apparatus as recited in claim 14, in which the location-independent identifier is an ASN.1 object identifier.

17. The apparatus as recited in claim 14, in which the data object comprises an executable program segment.

18. The apparatus as recited in claim 17, in which the executable program segment is in a platform-independent object code form.

19. The apparatus as recited in claim 14, in which the data object is a computer program.

20. The apparatus as recited in claim 14, in which the data object is a class object.

21. The apparatus as recited in claim 14, in which the data object is a program subroutine.

22. The apparatus as recited in claim 14, in which the data object is an image file.

23. The apparatus as recited in claim 14, in which the data object is a text file.

24. The apparatus as recited in claim 14, in which the data object is a sound file.

25. A system for the transmission of a data object, the system comprising:

(a) a client computer having a cache, the cache being indexed by a cache table;

(b) at least one server computer;

(c) the client computer and the server computer coupled by a communications link; and

(d) the client computer being responsive to requests for the data object having a location-independent identifier, whereby the client computer interrogates the cache using the location-independent identifier for the data object to determine whether the data object is cached, and if the data object is cached, obtains a copy of the data object from the cache, and otherwise calls the server computer to obtain the copy of the data object.

26. The system as recited in claim 25, in which the location-independent identifier is an ASN.1 object identifier.

27. The system as recited in claim 25, in which the data object comprises an executable program segment.

28. The system as recited in claim 27, in which the executable program segment is in a platform-independent object code form.

29. The system as recited in claim 25, in which the data object is a computer program.

30. The system as recited in claim 25, in which the data object is a class object.

31. The system as recited in claim 25, in which the data object is a program subroutine.

32. The system as recited in claim 25, in which the data object is an image file.

33. The system as recited in claim 25, in which the data object is a text file.

34. The system as recited in claim 25, in which the data object is a sound file.

35. A computer program embodied on a computer-readable medium for obtaining a copy of a data object, comprising:

(a) a first code segment for obtaining a location-independent identifier for the data object from a primary file;

(b) a second code segment for interrogating a cache using the location-independent identifier for the data object to determine whether the data object is cached; and

(c) a third code segment for, if the data object is cached, obtaining the copy of the data object.

36. The computer program as recited in claim 35, further comprising:

d) a fourth code segment for, if the data object is not cached, performing a network call to obtain the copy of the data object.

37. The computer program as recited in claim 35, in which the location-independent identifier is an ASN.1 object identifier.

38. The computer program as recited in claim 35, in which the data object comprises an executable program segment.

39. The computer program as recited in claim 36, in which the executable program segment is in a platform-independent object code form.

40. The computer program as recited in claim 35, in which the data object is a computer program.

41. The computer program as recited in claim 35, in which the data object is a class object.

42. The computer program as recited in claim 35, in which the data object is a program subroutine.

43. The computer program as recited in claim 35, in which the data object is an image file.

44. The computer program as recited in claim 35, in which the data object is a text file.

45. The computer program as recited in claim 35, in which the data object is a sound file.