TECHNIQUES FOR DETECTING INACTIVE BROWSER WINDOWS

• US 20120179744A1
• Filed: 01/06/2011
• Published: 07/12/2012
• Est. Priority Date: 01/06/2011
• Status: Active Grant

• Current Assignee: Oracle International Corporation (Oracle Corporation)
• Original Assignee: Oracle International Corporation (Oracle Corporation)
• Inventors: Sullivan, Blake, Gao, Yuan, Wang, Hongbing
• Granted Patent: US 8,892,635 B2
• Time in Patent Office: Days
• US Class Current: 709/203
• CPC Class Codes: G06F 3/0482 Interaction with lists of selectable items, e.g. menus
• CPC Class Codes: G06F 9/451 Execution arrangements for user interfaces
• CPC Class Codes: G06F 9/5022 Mechanisms to release resources
• CPC Class Codes: H04L 67/02 based on web technology, e.g. hypertext transfer protocol [HTTP]
• CPC Class Codes: H04L 67/535 Tracking the activity of the user network monitoring arrangements H04L43/00; recording of computer activity G06F11/34

Abstract

Embodiments of the present invention provide techniques for tracking the lifecycles of client-side browser windows in the context of a web application. In one set of embodiments, a server component of a web application can receive a notification that an application page in a first window has been unloaded/destroyed. In response, the server component can associate the first window with an expiration time and add the first window to an “expiration” list of windows that are potentially inactive. If a request is received by the server component from the first window while the first window is in the expiration list, the server component can identify the first window as active and remove it from the list. If a request is received by the server component from a second window after the expiration time associated with the first window, the server component can identify the first window as inactive and free all resources for the first window.

Claims

1. A method comprising:

maintaining, by a server computer system, a first list of windows open in a web browser running on a client computer system;

receiving, by the server computer system, a notification from the web browser that an application page displayed in a first window in the first list has been unloaded;

associating, by the server computer system, the first window with an expiration time; and

adding, by the server computer system, the first window to a second list of windows, the second list including a subset of windows in the first list that are potentially inactive.

2. The method of claim 1 further comprising:

receiving, by the server computer system from the web browser, a request originating from the first window; and

identifying, by the server computer system, the first window as still being active.

3. The method of claim 2 wherein identifying the first window as still being active comprises removing the first window from the second list.

4. The method of claim 1 further comprising:

receiving, by the server computer system from the web browser, a request originating from a second window in the second list; and

identifying, by the server computer system, the second window as still being active.

5. The method of claim 4 further comprising:

comparing, by the server computer system, a time at which the request was received with expiration time associated with windows in the second list; and

if the time at which the request was received is later than a window'"'"'s expiration time, identifying, by the server computer system, the window as being inactive.

6. The method of claim 5 wherein identifying the window as being inactive comprises:

removing the window from the first list and the second list; and

freeing resources associated with the window.

7. The method of claim 1 further comprising:

maintaining, by the server computer system, a session timeout variable for a user session associated with the windows open in the web browser, the session timeout variable being initialized to a first time period;

determining, by the server computer system, that the last remaining window in the first list has been unloaded; and

modifying, by the server computer system, the session timeout variable from the first time period to a second time period shorter than the first time period.

8. The method of claim 7 further comprising:

if a request originating from any window in the second list is received prior to expiration of the second time period, resetting, by the server computer system, the session timeout variable to the first time period,

else freeing, by the server computer system, resources associated with the user session and the last remaining window.

9. The method of claim 1 further comprising storing, by the server computer system for each window in the first list, an identifier of a current page loaded in the window.

10. A non-transitory computer readable storage medium having stored thereon instructions executable by a processor, the instructions including:

instructions that cause the processor to maintain a first list of windows open in a web browser running on a client computer system;

instructions that cause the processor to receive a notification from the web browser that an application page displayed in a first window in the first list has been unloaded;

instructions that cause the processor to associate the first window with an expiration time; and

instructions that cause the processor to add the first window to a second list of windows, the second list including a subset of windows in the first list that are potentially inactive.

11. The non-transitory computer readable storage medium of claim 10 wherein the instructions further comprise:

instructions that cause the processor to receive from the web browser a request originating from the first window; and

instructions that cause the processor to identify the first window as still being active.

12. The non-transitory computer readable medium of claim 11 wherein identifying the first window as still being active comprises removing the first window from the second list.

13. The non-transitory computer readable medium of claim 10 wherein the instructions further comprise:

instructions that cause the processor to receive from the web browser a request originating from a second window in the second list; and

instructions that cause the processor to identify the second window as still being active.

14. The non-transitory computer readable storage medium of claim 13 wherein the instructions further comprise:

instructions that cause the processor to compare a time at which the request was received with the expiration time associated with the first window; and

instructions that cause the processor to identify the first window as being inactive if the time at which the request was received is later than the expiration time associated with the first window.

15. A system comprising:

a processor configured to;

maintain a first list of windows open in a web browser running on a client computer system;

receive a notification from the web browser that an application page displayed in a first window in the first list has been unloaded;

associate the first window with an expiration time; and

add the first window to a second list of windows, the second list including a subset of windows in the first list that are potentially inactive.

16. The system of claim 15 wherein the processor is further configured to:

receive from the web browser a request originating from the first window; and

identify the first window as still being active.

17. The system of claim 16 wherein identifying the first window as still being active comprises removing the first window from the second list.

18. The system of claim 15 wherein the processor is further configured to:

receive from the web browser a request originating from a second window in the second list; and

identify the second window as still being active.

19. The system of claim 18 wherein the processor is further configured to:

compare a time at which the request was received with the expiration time associated with the first window; and

identify the first window as being inactive if the time at which the request was received is later than the expiration time associated with the first window.