SCRIPT GENERATION FOR GRACEFUL TERMINATION OF A WEB ENABLED CLIENT BY A WEB SERVER

• US 20090217240A1
• Filed: 02/22/2008
• Published: 08/27/2009
• Est. Priority Date: 02/22/2008
• Status: Abandoned Application

• Current Assignee: Ricoh Company Limited
• Original Assignee: Ricoh Company Limited
• Inventors: Motoyama, Tetsuro, Fong, Avery
• Application Number:
  US12/035,817
• Publication Number:
  US 20090217240A1
• Time in Patent Office: Days
• US Class Current: 717/114
• CPC Class Codes: G06F 11/0709 in a distributed system consisting of a plurality of standalone computer nodes, e.g. clusters, client-server systems
• CPC Class Codes: G06F 11/0793 Remedial or corrective actions recovery from an exception in an instruction pipeline G06F9/3861; by retry G06F11/1402; for recovering from a failure of a protocol instance or entity H04L69/40
• CPC Class Codes: G06Q 10/06 Resources, workflows, human or project management; Enterprise or organisation planning; Enterprise or organisation modelling
• CPC Class Codes: H04L 67/02 based on web technology, e.g. hypertext transfer protocol [HTTP]
• CPC Class Codes: H04L 69/40 for recovering from a failure of a protocol instance or entity, e.g. service redundancy protocols, protocol state redundancy or protocol service redirection management of faults, events, alarms or notifications in data switching networks H04L41/06

Abstract

A client-server based project schedule management system comprises a task editor accessible through a web browser to perform various scheduling tasks by members of a project. A web server executes a code which is tested for abnormal conditions using an exception handler coded in PHP. If an abnormal condition has been encountered, the exception handler calls one or more global functions to generate and send a JavaScript to the client for gracefully terminating execution of the client-side browser executable code. The exception handler also contemporaneously terminates execution of executable code on the web server which encountered the abnormal condition.

Claims

1. A computer implemented method comprising:

executing programmatic instructions on a web server associated with a project management system;

determining during execution of the programmatic instructions whether an abnormal condition is encountered using an exception handler on the server; and

,

if an abnormal condition is encountered on the server, generating a browser executable code for determining by a browser enabled client that the abnormal condition has been encountered by the server;

sending the browser executable code to the browser enabled client; and

,

terminating the execution of the programmatic instructions on the server.

2. The method of claim 1 wherein the browser executable code is programmed in a programming language that has no inherent language construct that can be used to cause termination of a program written in that language.

3. The method of claim 1 further comprising detecting whether the web server is operating in a debugging mode, and in response to detecting that the web server is operating in a debugging mode, generating the browser executable code using code which when executed causes displaying, in a browser window, information identifying server-side code that caused the abnormal condition.

4. The method of claim 3 wherein the information specifies one or more of a filename, a code line number, a class, and a function which called the exception handler.

5. The method according to claim 1 wherein the generated browser executable code is programmed in JavaScript.

6. The method according to claim 1 wherein the exception handler is a global function programmed in PHP.

7. The method according to claim 6 wherein the global function is configured to capture the abnormal condition for output on a display coupled to the web server.

8. The method according to claim 6 wherein the abnormal condition is one of;

a filename, a code line number, a class, and a function which called the global function.

9. A data processing system comprising:

a web browser enabled client in network communications with a web server, the web server including;

a processor;

a memory coupled to the processor having instructions which when executed by the processor causes the processor to;

execute programmatic instructions on the web server associated with a project management system;

determine during execution of the programmatic instructions whether an abnormal condition is encountered using an exception handler on the server; and

,

if an abnormal condition is encountered on the server, generate a browser executable code for determination by the browser enabled client that the abnormal condition has been encountered by the server;

send the browser executable code to the browser enabled client; and

,

terminate the execution of the programmatic instructions on the server.

10. The system of claim 9 wherein the browser executable code is programmed in a programming language that has no inherent language construct that can be used to cause termination of a program written in that language.

11. The system of claim 9 further comprising instructions which when executed cause detecting whether the web server is operating in a debugging mode, and in response to detecting that the web server is operating in a debugging mode, generating the browser executable code using code which when executed causes displaying, in a browser window, information identifying server-side code that caused the abnormal condition.

12. The system of claim 9 wherein the information specifies one or more of a filename, a code line number, a class, and a function which called the exception handler.

13. The system according to claim 9 wherein the generated browser executable code is programmed in JavaScript.

14. The system according to claim 9 wherein the exception handler is a global function programmed in PHP.

15. The system according to claim 14 wherein the global function is configured to capture the abnormal condition for output on a display coupled to the web server.

16. The system according to claim 14 wherein the abnormal condition is one of;

a filename, a code line number, a class, and a function which called the global function.

17. A computer-readable medium, comprising one or more sequences of instructions which, when executed by one or more processors, cause the one or more processors to perform:

executing programmatic instructions on a web server associated with a project management system;

determining during execution of the programmatic instructions whether an abnormal condition is encountered using an exception handler on the server; and

,

if an abnormal condition is encountered on the server, generating a browser executable code for determining by a browser enabled client that the abnormal condition has been encountered by the server;

sending the browser executable code to the browser enabled client; and

,

terminating the execution of the programmatic instructions on the server.

18. The computer-readable medium of claim 17 wherein the browser executable code is programmed in a programming language that has no inherent language construct that can be used to cause termination of a program written in that language.

19. The computer-readable medium of claim 17 further comprising instructions which when executed cause detecting whether the web server is operating in a debugging mode, and in response to detecting that the web server is operating in a debugging mode, generating the browser executable code using code which when executed causes displaying, in a browser window, information identifying server-side code that caused the abnormal condition.

20. The computer-readable medium of claim 17 wherein the information specifies one or more of a filename, a code line number, a class, and a function which called the exception handler.

21. The computer-readable medium of claim 17 wherein the generated browser executable code is programmed in JavaScript.

22. The computer-readable medium of claim 17 wherein the exception handler is a global function programmed in PHP.

23. The computer-readable medium of claim 22 wherein the global function is configured to capture the abnormal condition for output on a display coupled to the web server.

24. The computer-readable medium of claim 22 wherein the abnormal condition is one of;

a filename, a code line number, a class, and a function which called the global function.

25. A computer-readable medium, comprising one or more sequences of instructions which, when executed by one or more processors, cause the one or more processors to perform:

executing JavaScript programmatic instructions on a web server associated with a project management system;

determining during execution of the programmatic instructions whether an abnormal condition is encountered using an exception handler on the server, wherein the exception handler is a global function programmed in PHP and is configured to capture the abnormal condition for output on a display coupled to the web server;

if an abnormal condition is encountered on the server, generating a browser executable code for determining by a browser enabled client that the abnormal condition has been encountered by the server;

sending the browser executable code to the browser enabled client; and

,

terminating the execution of the programmatic instructions on the server.