Synchronous object unification protocol

• US 20040054809A1
• Filed: 08/26/2002
• Published: 03/18/2004
• Est. Priority Date: 08/26/2002
• Status: Abandoned Application

• Current Assignee: Sun Microsystems Incorporated (Oracle Corporation)
• Original Assignee: Sun Microsystems Incorporated (Oracle Corporation)
• Inventors: Goff, Max K.
• Application Number:
  US10/189,053
• Publication Number:
  US 20040054809A1
• Time in Patent Office: Days
• US Class Current: 709/248
• CPC Class Codes: H04L 69/329 in the application layer [OSI layer 7]

Abstract

One embodiment of the present invention provides a system that coordinates timing of events related to objects within a distributed computing system. During operation, the system receives a request to set a time base associated with an object to a current time value. This request is received through a protocol associated with the object. In response to the request, the system sets the time base associated with the object to the current time value, so that subsequent operations involving the object can be synchronized. In a variation on this embodiment, the object is defined within an object-oriented programming system, and the object is defined to include the time base.

Claims

1. A method for coordinating timing of events related to objects within a distributed computing system, comprising:

receiving a request to set a time base associated with an object to a current time value;

wherein the request is received through a protocol associated with the object; and

in response to the request, setting the time base associated with the object to the current time value, so that subsequent operations involving the object can be synchronized.

2. The method of claim 1,

wherein the object is defined within an object-oriented programming system;

and

wherein the object is defined to include the time base.

3. The method of claim 1, further comprising:

receiving a request to get time the current time value;

in response to the request,

extracting the current time value from a global time base, and

returning the current time value.

4. The method of claim 3, wherein extracting the current time value from the global time base involves extracting the current time value from a Global Positioning System (GPS) signal.

5. The method of claim 3, wherein extracting the current time value from the global time base involves extracting the current time value from a local timer that has been recently updated with reference to a Global Positioning System (GPS) signal.

6. The method of claim 1, wherein the time base associated with the object contains an advancing time value that keeps track of time relative to a local time base.

7. The method of claim 1, wherein the time base associated with the object contains a fixed time value.

8. The method of claim 1, further comprising using the time base associated with the object to coordinate events with other entities in the distributed computing system.

9. The method of claim 8, wherein the other entities include other objects with associated time bases.

10. The method of claim 8, wherein the other entities are located on other nodes in the distributed computing system.

11. The method of claim 1, wherein the distributed computing system includes geographically distributed nodes.

12. A computer-readable storage medium storing instructions that when executed by a computer cause the computer to perform a method for coordinating timing of events related to objects within a distributed computing system, the method comprising:

receiving a request to set a time base associated with an object to a current time value;

wherein the request is received through a protocol associated with the object; and

in response to the request, setting the time base associated with the object to the current time value, so that subsequent operations involving the object can be synchronized.

13. The computer-readable storage medium of claim 12,

wherein the object is defined within an object-oriented programming system;

and

wherein the object is defined to include the time base.

14. The computer-readable storage medium of claim 12, wherein the method further comprises:

receiving a request to get time the current time value;

in response to the request,

extracting the current time value from a global time base, and

returning the current time value.

15. The computer-readable storage medium of claim 14, wherein extracting the current time value from the global time base involves extracting the current time value from a Global Positioning System (GPS) signal.

16. The computer-readable storage medium of claim 14, wherein extracting the current time value from the global time base involves extracting the current time value from a local timer that has been recently updated with reference to a Global Positioning System (GPS) signal.

17. The computer-readable storage medium of claim 12, wherein the time base associated with the object contains an advancing time value that keeps track of time relative to a local time base.

18. The computer-readable storage medium of claim 12, wherein the time base associated with the object contains a fixed time value.

19. The computer-readable storage medium of claim 12, wherein the method further comprises using the time base associated with the object to coordinate events with other entities in the distributed computing system.

20. The computer-readable storage medium of claim 19, wherein the other entities include other objects with associated time bases.

21. The computer-readable storage medium of claim 19, wherein the other entities are located on other nodes in the distributed computing system.

22. The computer-readable storage medium of claim 12, wherein the distributed computing system includes geographically distributed nodes.

23. An apparatus that coordinates timing for events related to objects within a distributed computing system, comprising:

a receiving mechanism that is configured to receive a request to set a time base associated with an object to a current time value;

wherein the receiving mechanism receives the request in a format that adheres to a protocol associated with the object; and

a time base setting mechanism, wherein in response to the request, the time base setting mechanism is configured to set the time base associated with the object to the current time value, so that subsequent operations involving the object can be synchronized.

24. The apparatus of claim 23,

wherein the object is defined within an object-oriented programming system;

and

wherein the object is defined to include the time base.

25. The apparatus of claim 23,

wherein the receiving mechanism is further configured to receive a request to get time the current time value;

and

wherein the apparatus further comprises a time extraction mechanism, wherein in response to the request, the time extraction mechanism is configured to,

extract the current time value from a global time base, and to

return the current time value.

26. The apparatus of claim 25, wherein the time extraction mechanism is configured to extract the current time value from a Global Positioning System (GPS) signal.

27. The apparatus of claim 25, wherein the time extraction mechanism is configured to extract the current time value from a local timer that has been recently updated with reference to a Global Positioning System (GPS) signal.

28. The apparatus of claim 23, wherein the time base associated with the object contains an advancing time value that keeps track of time relative to a local time base.

29. The apparatus of claim 23, wherein the time base associated with the object contains a fixed time value.

30. The apparatus of claim 23, further comprising an execution mechanism that uses the time base associated with the object to coordinate events with other entities in the distributed computing system.

31. The apparatus of claim 30, wherein the other entities include other objects with associated time bases.

32. The apparatus of claim 30, wherein the other entities are located on other nodes in the distributed computing system.

33. The apparatus of claim 23, wherein the distributed computing system includes geographically distributed nodes.