Dynamically managing data conveyance between computing devices

• US 7,516,135 B2
• Filed: 05/30/2003
• Issued: 04/07/2009
• Est. Priority Date: 05/30/2003
• Status: Expired due to Term

• Current Assignee: SAP SE
• Original Assignee: SAP AG (SAP SE)
• Inventors: Bayyapu, Pavan
• Primary Examiner(s): ROBINSON, GRETA LEE
• Application Number:
  US10/449,920
• Publication Number:
  US 20040243617A1
• Time in Patent Office: 2,139 Days
• Field of Search: 709/201, 709/203, 709/237, 709/204, 709/206, 709/207, 709/236, 709227-232, 709/208, 719/313, 719/319, 707/201, 707/200, 707/10, 707/104.1, 707/102, 707/202, 715/513, 715/234, 715/749, 714/1
• US Class Current: 1/1
• CPC Class Codes: H04L 67/62 Establishing a time schedule for servicing the requests
• CPC Class Codes: H04L 69/329 in the application layer [OSI layer 7]
• CPC Class Codes: Y10S 707/99943 Generating database or data structure, e.g. via user interface

Abstract

Dynamically managing data conveyance between computing devices may be achieved by a data distribution device establishing a data pull service in response to a subscription request from a data acquisition device, the data pull service having a first refresh interval, determining whether new data is available, if new data is available, determining whether the data is responsive to the subscription request, if the data is responsive to the subscription request, determining an interval for the responsive new data becoming available, and determining a second refresh interval for the data pull service based on the determined interval.

Claims

1. A method performed by a data distribution device, the method comprising:

implementing a data pull service in response to a subscription request from a data acquisition device, the data pull service having a first refresh interval, the first refresh interval indicating when the data distribution device should be contacted regarding data responsive to the subscription request;

determining whether new data is available;

if new data is available, determining whether the new data is responsive to the subscription request;

if the new data is responsive to the subscription request, determining an interval at which responsive new data is becoming available;

determining a second refresh interval for the data pull service based at least on the determined interval, the second refresh interval indicating when the data distribution device should be contacted regarding data responsive to the subscription request; and

generating a message for the data acquisition device, the message comprising the second refresh interval.

2. The method of claim 1, further comprising:

determining whether a data pull request for the data pull service has been received; and

if the data pull request has been received, sending the message.

3. The method of claim 1, further comprising:

receiving a message comprising a subscription request;

determining an attribute of data responsive to the subscription request; and

selecting, based on a current state of the data distribution device and the attribute of the responsive data, between the data pull service and a data push service for providing the responsive data.

4. The method of claim 3, further comprising:

if the selected service comprises the data pull service, determining the first refresh interval; and

sending a message comprising the first refresh interval.

5. The method of claim 1, further comprising:

determining whether the new data is responsive to a subscription request for a data push service; and

if the data is responsive to a subscription request for a data push service, sending a message comprising the data.

6. The method of claim 1, further comprising:

tracking an amount of time for responsive new data becoming available; and

sending a message comprising a disconnect notification if a predefined period of time has expired.

7. The method of claim 1, wherein determining a second refresh interval comprises analyzing intervals at which responsive new data is becoming available.

8. The method of claim 1, further comprising:

determining whether a message indicating that the service should be stopped has been received; and

if a stoppage message has been received, releasing resources for the service.

9. The method of claim 1, further comprising:

sending a message comprising an acknowledge request; and

determining whether a response to the acknowledge request has been received.

10. The method of claim 9, further comprising deciding to use a data pull service if a response to the acknowledge request has not been received.

11. The method of claim 1, further comprising sending the responsive new data in response to a data pull request.

12. The method of claim 1, wherein implementing a data pull service in response to a subscription request from a data acquisition device comprises processing a subscription request generated by a mobile client.

13. The method of claim 1, wherein determining whether new data is available comprises analyzing data generated by an automated process.

14. The method of claim 1, further comprising:

receiving a message comprising a subscription request; and

selecting, based on a current state of the data distribution device, between a first type of data service and a second type of data service for providing data responsive to the subscription request.

15. A system comprising:

a data distribution device comprising;

a communication network interface operable to receive a subscription request from a data acquisition device; and

a processor operable to;

implement a data pull service in response to the subscription request, the data pull service having a first refresh interval, the first refresh interval indicating when the data distribution device should be contacted regarding data responsive to the subscription request;

determine whether new data is available,

if new data is available, determine whether the new data is responsive to the subscription request,

if the new data is responsive to the subscription request, determine an interval at which responsive new data is becoming available,

determine a second refresh interval for the data pull service based at least on the determined interval, the second refresh interval indicating when the data distribution device should be contacted regarding data responsive to the subscription request; and

generate a message for the data acquisition device, the message comprising the second refresh interval.

16. The system of claim 15, wherein:

the communication network interface is further operable to receive a data pull request for the data pull service; and

the processor is further operable to;

determine whether the data pull request has been received, and

if the data pull request has been received, initiate sending of the message.

17. The system of claim 15, wherein:

the communication network interface is further operable to receive a message comprising a subscription request; and

the processor is further operable to;

determine an attribute of data responsive to the subscription request, and

select, based on a current state of the data distribution device and the attribute of the responsive data, between the data pull service and a data push service for providing the responsive data.

18. The system of claim 17, wherein the processor is further operable to:

if the selected service comprises the data pull service, determine the first refresh interval; and

generate a message comprising the first refresh interval.

19. The system of claim 15, wherein the processor is further operable to:

determine whether the new data is responsive to a subscription request for a data push service; and

if the data is responsive to a subscription request for a data push service, generate a message comprising the data.

20. The system of claim 15, wherein the processor is further operable to:

track an amount of time for responsive new data becoming available; and

generate a message comprising a disconnect notification if a predefined period of time has expired.

21. The system of claim 15, wherein the processor is operable to analyze intervals at which responsive new data is becoming available to determine the second refresh interval.

22. The system of claim 15, wherein the data distribution device comprises a sewer.

23. The system of claim 15, wherein the processor is further operable to:

generate a message comprising an acknowledge request; and

determine whether a response to the acknowledge request has been received.

24. The system of claim 23, wherein the processor is farther operable to decide to use a data pull service if a response to the acknowledge request has not been received.

25. The system of claim 15, wherein the processor is further operable to send the responsive new data in response to a data pull request.

26. The system of claim 15, wherein the processor is operable to process a subscription request generated by a mobile client to implement a data pull service in response to a subscription request from a data acquisition device.

27. The system of claim 15, the processor is operable to analyze data generated by an automated process to determine whether new data is available.

28. The system of claim 15, wherein the processor is operable to select, based on a current state of the data distribution device, between a first type of data service and a second type of data service for providing data responsive to the subscription request.

29. An article comprising a machine-readable medium storing instructions operable to cause a data distribution device to perform operations comprising:

implementing a data pull service in response to a subscription request from a data acquisition device, the data pull service having a first refresh interval, the first refresh interval indicating when the data distribution device should be contacted regarding data responsive to the subscription request;

determining whether new data is available;

if new data is available, determining whether the new data is responsive to the subscription request;

if the new data is responsive to the subscription request, determining an interval at which responsive new data is becoming available;

determining a second refresh interval for the data pull service based at least on the determined interval, the second refresh interval indicating when the data distribution device should be contacted regarding data responsive to the subscription request; and

generating a message for the data acquisition device, the message comprising the second refresh interval.

30. The article of claim 29, wherein the instructions are farther operable to cause a data distribution device to perform operations comprising:

determining whether a data pull request for the data pull service has been received; and

if the data pull request has been received, generating the message.

31. The article of claim 29, wherein the instructions are farther operable to cause a data distribution device to perform operations comprising:

determining whether a message comprising a subscription request has been received;

determining an attribute of data responsive to the subscription request; and

selecting, based on a current state of the data distribution device and the attribute of the responsive data, between the data pull service and a data push service for providing the responsive data.

32. The article of claim 31, wherein the instructions are further operable to cause a data distribution device to perform operations comprising:

if the selected service comprises the data pull service, determining the first refresh interval; and

generating a message comprising the first refresh interval.

33. The article of claim 29, wherein the instructions are further operable to cause a data distribution device to perform operations comprising:

determining whether the new data is responsive to a subscription request for a data push service; and

if the data is responsive to a subscription request for a data push service, generating a message comprising the data.

34. The article of claim 29, wherein the instructions are further operable to cause a data distribution device to perform operations comprising:

tracking an amount of time for responsive new data becoming available; and

generating a message comprising a disconnect notification if a predefined period of time has expired.

35. The article of claim 29, wherein the instructions are operable to cause a data distribution device to analyze the intervals at which responsive new data is becoming available to determine the second refresh interval.

36. The article of claim 29, wherein the instructions are further operable to cause a data distribution device to perform operations comprising:

generating a message comprising an acknowledge request; and

determining whether a response to the acknowledge request has been received.

37. The article of claim 36, wherein the instructions are further operable to cause a data distribution device to perform operations comprising deciding to use a data pull service if a response to the acknowledge request has not been received.

38. The article of claim 29, wherein the instructions are further operable to cause one or more machines to send the responsive new data in response to a data pull request.

39. The article of claim 29, wherein the instructions are operable to cause a data distribution device to process a subscription request generated by a mobile client to implement a data pull service in response to a subscription request from a data acquisition device.

40. The article of claim 29, wherein the instructions are operable to cause a data distribution device to analyze data generated by an automated process to determine whether new data is available.

41. The article of claim 29, wherein the instructions are operable to cause a data distribution device to select, based on a current state of the data distribution device, between a first type of data service and a second type of data service for providing data responsive to the subscription request.

42. A system comprising:

a data acquisition device operable to;

determine whether data is desired by a process,

if data is desired, send a message comprising a subscription request,

determine whether an acknowledge request has been received,

if an acknowledge request has been received, send a response,

determine whether a message regarding a selected service has been received,

if a message regarding a selected service has been received, determine whether the selected service is a data pull service or a data push service based on the received message, the data pull service having a first refresh interval,

if the service is a data pull service;

determine whether the first refresh interval has expired;

if the first refresh interval has expired, send a message requesting new data;

determine whether a message comprising new data and a second refresh interval has been received; and

if a message comprising new data and a second refresh interval has been received, update existing data and the first refresh interval,

if the selected service is a data push service;

establish a persistent connection;

determine whether a message comprising new data has been received; and

if a message comprising new data has been received, update existing data,

determine whether the selected service is still desired,

if the service is not still desired, send a message indicating that the service should be stopped,

determine whether a message comprising a disconnect notification has been received, and

if a disconnect notification has been received, determine whether disconnection is acceptable; and

a data distribution device operable to;

determine whether the message comprising the subscription request has been received,

if a subscription request has been received;

determine an attribute of data responsive to the subscription request;

send a message comprising an acknowledge request;

determine whether a response to the acknowledge request has been received; and

select, based on a current state of the data distribution device, the attribute of the responsive data, and the response to the acknowledge request, if any, between the data pull service and the data push service for providing the responsive data,

if the selected service is a data pull service;

determine the first refresh interval, the first refresh interval indicating when the data acquisition device should contact the data distribution device regarding data responsive to the subscription request;

send the message regarding the selected service, the message comprising the refresh interval;

determine whether new data is available;

if new data is available, determine whether the new data is responsive to the subscription request;

if the new data is responsive, store the responsive new data;

determine the second refresh interval for the data pull service based on intervals at which responsive new data is becoming available, the second refresh interval indicating when the data acquisition device should contact the data distribution device regarding data responsive to the subscription request;

receive the message requesting new data; and

if the message requesting new data has been received, send the message comprising the new data and the second refresh interval,

if the selected service is a data push service;

send the message regarding the selected service;

determine whether new data is available;

if new data is available, determine whether the data is responsive to the subscription request; and

if the data is responsive to the subscription request, send a message comprising the data,

track an amount of time for responsive new data becoming available,

send the message comprising a disconnect notification if a predefined period of time has expired,

determine whether the service stoppage message has been received, and release resources for the service if the service stoppage message has been received.