JPH02267645A - Automatic roll-back system for report file - Google Patents

Abstract

PURPOSE:To attain an automatic roll-back system for report files by performing automatically the saving/recovering processes of a file position pointer and the update of this pointer within a VTOC at occurrence of a transaction processing fault. CONSTITUTION:A report file position pointer recovering means 10 obtains a file position pointer for a report file 14 out of a saving area 13 when a transaction process is started. Based on the value of the pointer, a VTOC information updating means 12 is called out and the VTOC information on the file 14 is updated. Therefore the control can be restored to the file position pointer of the file 14 at the head of a transaction reprocess when the preceding transaction process is started. As a result, the roll-back process of the file 14 is automatically carried out via an object program 4.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a report file recovery process during reprocessing when a failure occurs in a user program, and particularly to a method for automatically performing a report file recovery process.

(Prior Art) Conventionally, this type of report file recovery processing has been almost impossible. In addition, K, who executes the recovery process even if it is impossible, is indispensable for other resources such as preparing a separate file and writing it into a report file for each transaction process.

(Problem to be solved by the invention) In the conventional report file recovery processing method described above,
The drawback is that extra resources for saving must be prepared and complicated processing must be performed on the program side.

Generally, it is difficult to execute the above processing, so recovery processing is not normally performed, which has the disadvantage of disrupting reports.

An object of the present invention is to automatically perform the save/recovery processing of a file location pointer and the update of the pointer in VTOC when a failure occurs in transaction processing in rollback of a report file when reprocessing failure processing. It is an object of the present invention to provide an automatic roll batter method for report files configured to eliminate shortcomings and ensure that recovery processing is executed.

(Means for Solving the Problems) The automatic o-reback method for report files according to the present invention includes a report file position pointer save/recovery request embedding means, a report file position pointer save request means, a report file position pointer save means, vTO
The system is configured to include C information acquisition means, report file position pointer recovery request means, report file position pointer recovery means, and vTOC information update means.

The report file position pointer save/recovery request embedding means is for embedding transaction processing into the object program.

The report file position pointer save request means is for requesting the save of the report file position pointer at the start of transaction processing, which is embedded in the object program by the report file position pointer save/recovery request embedding means.

The report file position pointer save means is called by the report file position pointer save request means and is for saving the file position pointer of the report file to the save area.

The VTOC information acquisition means is called by the report file position pointer saving means and is for returning the file position pointer in the VTOC of the report file.

The report file position pointer recovery request means is for recovering the file position pointer in the VTOC of the report file when failure processing occurs.

The report file position pointer recovery means is called by the report file position pointer recovery request means and is for restoring the file position pointer from the save area.

The VTOC information updating means is called by the report file position pointer recovery means and is for updating and recovering the file position pointer in the VTOC of the report file.

(Example) Next, the present invention will be explained in detail with reference to the drawings.

FIG. 1 is a block diagram showing an embodiment of an automatic report file rollback method according to the present invention.

In FIG. 1, 1 is a source program, 2 is a compiler, 3 is a report file pointer save 7 restoration request embedding means, 4 is an object program, 5 is a report file position pointer save request means, and 6 is a report file position pointer. Recovery requesting means, 7 object body, 8 execution program monitor, 9 report file position pointer saving means, 10 report file position pointer recovery means, 11 VTOC information acquisition means, 12 vTOC information updating means, 13 saving Area 14 is a report file.

Referring to FIG. 1, one embodiment of the present invention includes a compiler 2
When creating an object program by inputting the source program 1 from , in addition to the normal object body 7,
The report file position pointer save/recovery request embedding means 3 generates a report file position pointer save request means 5 and a report file position pointer recovery request means 6 in the object program 4.

Next, when the object program 4 is executed, the object body 7 calls the report file position pointer saving means 9 of the execution program monitor 8 by the report file position pointer saving request means 5 at the start of transaction processing. The means 9 calls the vTOC information acquisition means 11, acquires the current file position pointer from the VTOC information of the report file 14, and sets it in the save area 13.

After this, if a failure occurs during the execution of the object program 4, it is necessary to re-execute the transaction process from the beginning. Therefore, in order to restore the contents of the report file 14 written in the transaction process, the object body 7 uses the report file position pointer recovery request means 6 to call the report file position pointer recovery means 10 of the execution program monitor 8.

The report file position pointer recovery means 10 obtains the file position pointer of the report file 14 at the start of transaction processing from the save area 13, calls the VTOC information update means 12 based on this value, and restores the VTOC of the report file 14. Update information.

As described above, at the beginning of the reprocessing of the transaction process, control can be restored to the file position pointer of the report file 14 at the start of the previous transaction process.

In this way, the object program 4 can automatically roll back the report file 14.

(Effects of the Invention) As explained above, the present invention enables saving/recovery processing of file position pointers and updating of pointers in VTOC in rollback of report files during reprocessing of failure processing. By having rollbacks performed automatically at times, there is an effect that rollbacks of report files can be performed automatically without the user being consciously aware of them. Further, there is an effect that rollback processing can be performed economically without using other extra resources.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing an embodiment of an automatic report file rollback method according to the present invention. 1... Source program 2... Compiler 3... Report file position pointer save/recovery request embedding means 4... Object program 5... Report file position pointer save request means 6... Report file position pointer Recovery requesting means 7...Object body 8...Execution program monitor 9...Report file position pointer saving means 10.
... YTOC information acquisition means 11 ... report file position pointer recovery means 12
... VTOC information update means 13 ... Evacuation area 14 ... Report file Patent applicant Hisashi Inoro, patent attorney representing NEC Corporation

Claims (1)

[Claims] A report file position pointer save/recovery request embedding means for embedding transaction processing into an object program, and a report file at the start of transaction processing embedded in the object program by the report file position pointer save/recovery request embedding means. a report file position pointer save request means for requesting saving of the position pointer of the report file; and a report file position pointer called by the report file position pointer save request means for saving the file position pointer of the report file to a save area. a saving means; a VTOC information acquisition means called by the report file position pointer saving means to return a file position pointer in the VTOC of the report file; and a file position pointer in the VTOC of the report file when a failure process occurs. a report file position pointer recovery request means for restoring the report file position pointer; a report file position pointer recovery means called by the report file position pointer recovery request means for restoring the file position pointer from the save area; An automatic rollback method for a report file, comprising: a VTOC information update means called by a position pointer recovery means for updating and restoring a file position pointer in the VTOC of the report file.