Plug-in cache

• US 10,129,363 B2
• Filed: 05/29/2015
• Issued: 11/13/2018
• Est. Priority Date: 05/29/2015
• Status: Active Grant

• Current Assignee: SAP SE
• Original Assignee: SAP SE
• Inventors: Moser, Martin
• Primary Examiner(s): Chang, Jungwon
• Application Number:
  US14/725,568
• Publication Number:
  US 20160352858A1
• Time in Patent Office: 1,264 Days
• Field of Search: 709217, 709219, 711118
• CPC Class Codes: G06F 12/0815 Cache consistency protocols
• CPC Class Codes: G06F 2212/621 Coherency control relating to peripheral accessing, e.g. from DMA or I/O device
• CPC Class Codes: G06F 40/197 Version control for software G06F8/71
• CPC Class Codes: G06F 9/30047 Prefetch instructions; cache control instructions
• CPC Class Codes: H04L 67/568 Storing data temporarily at an intermediate stage, e.g. caching
• CPC Class Codes: H04L 67/5682 Policies or rules for updating, deleting or replacing the stored data

Abstract

An application may support the use of a plug-in. A plug-in may have an associated cache. The application may allow the plug-in to intercept network requests. The plug-in can determine if a network request is for an already-cached resource and provide the resource as a response to the intercepted network request. Additionally or alternatively, the application may allow the plug-in to make network requests. The plug-in can make a network request for data in order to add the data to the plug-in'"'"'s cache. The plug-in may be able to determine when the application, the system, the network, or any suitable combination thereof are idle and cause cache requests to be made during idle periods.

Claims

1. A system comprising:

a memory comprising instructions; and

one or more processors configured by the instructions to implement;

an application module;

a cache control module; and

a plug-in module implemented by one or more hardware processors, the plug-in module being configured to;

determine that an item in a memory has expired;

determine that the application module is idle;

in response to the application module being idle, initiate a data request, for an updated version of the expired item, to the application module, the data request being marked as a cache request;

responsive to the data request, receive data from the application module, the received data being marked as a cache response; and

responsive to receiving the received data, request the cache control module to update the expired item with the received data;

the cache control module being configured to;

receive instructions from the plug-in module;

store data provided by the plug-in module in a memory; and

retrieve data from the memory for access by the plug-in module;

the application module being configured to, prior to making a second data request, inform the plug-in module of the second data request; and

the plug-in module being further configured to;

based on whether data responsive to the second data request is stored in the memory, either;

allow the second data request to proceed without modification;

or request the data responsive to the second data request from the cache control module, and provide the data responsive to the second data request to the application module.

2. The system of claim 1, wherein:

the application module is configured to communicate with a plurality of servers, a first server of the plurality of servers being configured to provide exclusively cacheable data;

the data request indicates that the updated version of the expired item is to be retrieved from the first server; and

the data request being marked as a cache request comprises the indication that the updated version of the expired item is to be retrieved from the first server.

3. The system of claim 1, wherein the plug-in module is further configured to:

determine that the system is idle; and

wherein the initiating of the data request is further in response to the determination that the system is idle.

4. The system of claim 1, wherein the expired item is data.

5. The system of claim 1, wherein the expired item is code.

6. The system of claim 1, wherein the received data includes an expiration date.

7. A method comprising:

determining, by a plug-in implemented by one or more hardware processors of a machine, that an item in a cache has expired;

determining, by the plug-in, that an application is idle;

in response to the application being idle, initiating, by the plug-in, a data request to the application for an updated version of the expired item, the data request being marked as a cache request;

responsive to the data request, receiving data from the application, the received data being marked as a cache response;

responsive to receiving the received data, updating the cache with the received data;

receiving, by the plug-in, a notification from the application of a second data request, the notification being received prior to the second data request being sent over a network;

determining whether data responsive to the second data request is stored in the cache; and

based on the determination, either;

allowing the second data request to proceed without modification;

or

accessing the data responsive to the second data request in the cache, and

providing the data responsive to the second data request to the application.

8. The method of claim 7, wherein:

the application is configured to communicate with a plurality of servers, a first server of the plurality of servers being configured to provide exclusively cacheable data;

the data request indicates that the updated version of the expired item is to be retrieved from the first server; and

the data request being marked as a cache request comprises the indication that the updated version of the expired item is to be retrieved from the first server.

9. The method of claim 7, further comprising:

determining that the machine is idle; and

wherein the initiating of the data request is further in response to the determination that the machine is idle.

10. The method of claim 7, wherein the expired item is data.

11. The method of claim 7, wherein the expired item is code.

12. The method of claim 7, wherein the received data includes an expiration date.

13. A non-transitory machine-readable storage medium comprising instructions that, when executed by one or more processors of a machine, cause the machine to perform operations comprising:

determining, by a plug-in module, that an item in a cache has expired;

determining, by the plug-in module, that an application is idle;

in response to the application being idle, initiating a data request to the application for an updated version of the expired item, the data request being marked as a cache request;

responsive to the data request, receiving data from the application, the received data being marked as a cache response;

responsive to receiving the received data, updating the cache with the received data;

receiving, by the plug-in module, a notification from the application of a second data request, the notification being received prior to the second data request being sent over a network;

determining whether data responsive to the second data request is stored in the cache; and

based on the determination, either;

allowing the second data request to proceed without modification;

or

accessing the data responsive to the second data request in the cache, and

providing the data responsive to the second data request to the application.

14. The non-transitory machine-readable storage medium of claim 13, wherein:

the application is configured to communicate with a plurality of servers, a first server of the plurality of servers being configured to provide exclusively cacheable data;

the data request indicates that the updated version of the expired item is to be retrieved from the first server; and

the data request being marked as a cache request comprises the indication that the updated version of the expired item is to be retrieved from the first server.

15. The non-transitory machine-readable storage medium of claim 13, wherein:

the application is configured to communicate with a plurality of servers, a first server of the plurality of servers being configured to provide exclusively cacheable data;

the data request indicates that the updated version of the expired item is to be retrieved from the first server; and

the data request being marked as a cache request comprises the indication that the updated version of the expired item is to be retrieved from the first server.

16. The non-transitory machine-readable storage medium of claim 13, wherein the plug-in module is further configured to:

determine that the machine is idle; and

wherein the initiating of the data request is further in response to the determination that the machine is idle.

17. The non-transitory machine-readable storage medium of claim 13, wherein the expired item is data.

18. The non-transitory machine-readable storage medium of claim 13, wherein the expired item is code.

19. The non-transitory machine-readable storage medium of claim 13, wherein the received data includes an expiration date.