System and method for controlling activity of temporary files in a computer system

• US 20040044930A1
• Filed: 08/30/2002
• Published: 03/04/2004
• Est. Priority Date: 08/30/2002
• Status: Active Grant

• Current Assignee: Hewlett-Packard Development Company, L.P. (HP Inc.)
• Original Assignee: Hewlett-Packard Development Company, L.P. (HP Inc.)
• Inventors: Rogers, Gregory Dennis, Robbert, George Harold, Keller, S. Brandon
• Granted Patent: US 6,957,367 B2
• Time in Patent Office: Days
• US Class Current: 714/48
• CPC Class Codes: G06F 11/0727 in a storage system, e.g. in a DASD or network based storage system drivers for digital recording or reproducing units G06F3/06; circuits for error detection or correction within digital recording or reproducing units G11B20/18; for distributed storage of data in networks, e.g. transport arrangements for network file system [NFS], storage area networks [SAN] or network attached storage [NAS], H04L67/1097
• 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

Abstract

A method for controlling activity of a temporary file associated with a target file to which data is to be written.

Claims

1. A method for controlling activity of a temporary file associated with a target file to which data is to be written in an object-oriented programming environment comprising the steps of:

creating a file controller object within a user program;

registering, with the file controller object, a file closing mode;

creating a temporary file for writing data thereto from the user program;

passing indicia of the temporary file, from the controller object to the user program;

writing said data to the temporary file, using said indicia; and

closing the temporary file, in the event of an error condition, in accordance with the file closing mode registered with the file controller object.

2. The method of claim 1, including the step of closing the file in accordance with the file closing mode registered with the file controller object, when said error condition is detected.

3. The method of claim 2, wherein the temporary file is closed via a destructor function associated with the file controller object, in accordance with the file closing mode registered with the file controller object.

4. The method of claim 3, wherein the destructor function is called by the user program on determination of said error condition.

5. The method of claim 3, wherein the destructor function is invoked automatically on termination of the user program.

6. The method of claim 1, wherein the step of registering includes registering the name of the target file and the file closing mode.

7. The method of claim 6, wherein the step of closing the file includes moving the data in the temporary file to the target file.

8. The method of claim 6, wherein the step of closing the file includes moving the data in the temporary file to the target file, and deleting the temporary file.

9. The method of claim 6, wherein the step of closing the file includes leaving intact the temporary file and the target file.

10. The method of claim 6, wherein the step of closing the file includes deleting the temporary file and leaving intact the target file.

11. The method of claim 1, wherein said file closing mode alternatively comprises a first mode, a second mode, or a third mode, wherein:

said first mode indicates that the temporary file is to be unconditionally moved to the target file;

said second mode indicates that the temporary file is to be left in place, and the target file is to be left intact; and

said third mode indicates that the temporary file is to be deleted, and the target file is to be left intact.

12. A system for controlling activity of a temporary file associated with a target file to which data is to be written in a software programming environment comprising:

a file opening function for creating a temporary file for writing data thereto from a user program, and

a global data structure, accessible to the file closing function and the user program; and

a file closing function for closing the temporary file, in the event of an error condition, in accordance with a file closing mode located in the data structure;

wherein the file opening function creates an entry in the data structure comprising data indicative of a name of said temporary file, a name of a target file associated with said temporary file, and the file closing mode with which temporary file is to be closed.

13. The system of claim 12, wherein said file opening function also creates a pointer to an open file handle in said entry in the data structure.

14. The system of claim 12, wherein said file closing mode indicates one of the following actions is to be performed:

the temporary file is to be unconditionally moved to the target file;

the temporary file is to be left in place, and the target file is to be left intact;

or

the temporary file is to be deleted, and the target file is to be left intact.

15. The system of claim 14, wherein the file closing function is called by the user program on determination of said error condition.

16. The system of claim 14, wherein the file closing function is invoked automatically on determination of said error condition by the associated operating system.

17. A method for controlling activity of a temporary file associated with a target file to which data is to be written in a software programming environment comprising the steps of:

creating a file opening function;

creating a file closing function for handling the temporary file in accordance with a file closing mode;

creating a global data structure, accessible to the file closing function and the user program;

registering, with the file opening function, a file closing mode;

creating a temporary file for writing data thereto from the user program;

creating an entry in the data structure comprising data indicative of a name of said temporary file, the name of the target file, and the file closing mode with which temporary file is to be closed;

writing data to the temporary file, using the data in the entry in the data structure; and

handling the temporary file in accordance with the file closing mode in the data structure, in the event of an error condition.

18. The method of claim 17, wherein said file closing mode indicates one of the following actions is to be performed:

the temporary file is to be unconditionally moved to the target file;

or

the temporary file is to be left in place, and the target file is to be left intact;

or

the temporary file is to be deleted, and the target file is to be left intact.

19. The system of claim 18, wherein the file closing function is called by the user program on determination of said error condition.

20. The system of claim 18, wherein the file closing function is invoked automatically on determination of said error condition by the associated operating

21. A system for controlling activity of a temporary file associated with a target file to which data is to be written in an object-oriented programming environment comprising:

means for creating a file controller object within a user program;

means for registering, with the file controller object, a file closing mode;

means for creating a temporary file for writing data thereto from the user program;

means for passing indicia of the temporary file, from the controller object to the user program;

means for writing said data to the temporary file, using said indicia; and

means for closing the temporary file, in the event of an error condition, in accordance with the file closing mode registered with the file controller object.