JP2718028B2 - How to access the program test file - Google Patents

Description

Description: FIELD OF THE INVENTION The present invention relates to a method for accessing a file for testing a program of a computing system, and particularly to a method for updating a file used in actual work without updating a file used in actual work. It relates to a method of accessing a file for use. 2. Description of the Related Art Often, a program under development experiences an abnormal termination due to a bug present in the program. In this case, if the program is updating the file, the data content may be destroyed. For this reason, in the calculation system according to the conventional method, when testing an application program for updating a file, it is usual to create a test file separately from an actual business file and perform a test using the test file. If you use business files, you must test the program you are developing at night or make a backup copy in case the file is destroyed so that it does not interfere with your business operations. In the case of using a test file as described above, not only the man-hour for creating the test file but also the capacity of a magnetic disk or the like is required for the test file. Further, the test file has a smaller amount of data than the business file, the content of the data becomes uniform, and it is difficult to completely eliminate the bug. (Problems to be Solved by the Invention) The conventional method for accessing a program test file has the following problems when a business file is updated using a file management function. (B) Since a buffer on the memory is shared by a plurality of programs, when a program under test updates a block on the memory, the processing of another program is performed by the data (hereinafter referred to as dirty data). It will be erroneous. (B) When the program under test issues the pause point setting service, dirty data is also written on the file. An object of the present invention is to provide a method for accessing a program test file that enables the use of a program under development in parallel with the operation of a business program, in order to solve the above-mentioned problems of the prior art. With the goal. (Means for Solving the Problems) According to the present invention, in a test mode of a program, a program under test occupies a data block on an input / output buffer and updates the data block. , And the exclusive use of the data block is maintained until the pause point setting service is issued by the program under test. When the pause point setting service is issued, the exclusive use of the data block is released and the This is to display contents invalidity in the entry output buffer to prevent the data block from being output to a file. (Operation) According to the present invention, the program test
Since the file access method has been configured, even if the application program in the test mode updates the data, other programs are prohibited from referring to the data and outputting the data to the file. When the process is abnormally terminated by a bug in the application program, the pause point setting process is automatically executed. (Embodiment) FIG. 1 is a block diagram showing an embodiment of the present invention at a processing level of a program. In FIG. 1, 1 is an application program, 2 is a mode instruction unit in the application program 1 indicating whether or not a test mode is set, and 3 is a file management system, which includes an access control unit 4 and a buffer management unit 5, It has a function of notifying an apparatus of an input / output request of the program 1 and is managed by a plurality of programs. Reference numeral 6 denotes a file, which is associated with the file management system 3 and the input / output buffer pool 7. The I / O buffer pool 7 is dynamically allocated when executing I / O, and is managed by the file management system 3. Now, when an input / output request is issued from the application program 1, the access control unit 4 analyzes the input / output request to which block of the file 6, and issues the input / output request to the buffer management unit 5. If the block has been previously accessed by the application program 1 or another application program and exists in the input / output buffer pool 7, the buffer management unit 5 passes the block to the access control unit 4 as it is. In this way, high-speed processing can be performed by performing input / output management of data on frequently accessed blocks only in the memory without involving access to the file 6. Further, at the break of the processing of the application program 1, as described above, the blocks updated by the buffer on the memory are simultaneously output to the file 6 to prepare for the disappearance of the data on the memory due to the power failure. A service that performs this function is hereinafter referred to as a pause service. Next, a series of processes executed in the present invention will be described with reference to a flowchart shown in FIG. Application program 1
Issues the data update service 8, the processing of the data update service 9 is started. First, in process 10, the file management system 3 searches the I / O buffer pool 7, and in decision 11, checks whether the block already exists in the I / O buffer pool 7 or not. If not (NO),
At step 12, the block is occupied by the program, at step 13, a buffer is secured, and at step 16, the block is input from the file to the buffer. If it is determined that the block exists on the I / O buffer pool 7 (YES), the block is occupied by the program by the process 14. In decision 15, it is checked whether the content is invalid. If the block is invalid, the block is input from the file by the process 16. However, if the content is not invalid, that is, if it has already been occupied by another program, the process goes to step 17 and waits until it is released. Next, the data of the input / output buffer pool 7 is updated by the processing 17. According to the judgment 18, the mode instruction unit 2 of the application program 1 is referred to, and if it is not the test mode (NO),
In step 19, the occupation of the block is released to allow access from other programs. However, if it is determined that the test mode is the test mode (YES), a series of processing of the data update service 9 is terminated while occupying the block, and the control is returned to the application program 1 as indicated by the dotted line. Next, the case where the application program 1 executes the pause point setting service issue 20 at a break in processing will be described. When the pause point setting service issuance 21 is started, the file management system 3 checks the mode instruction unit 2 of the application program 1 according to the judgment 22, and if not in the test mode (NO), the process 21
Updated data on the I / O buffer pool 7
Output the block to file 6. If it is in the test mode (YES), the contents of the blocks that the program continues to occupy from the data update service 8 are invalidated by the processing 24. This process 24 can be performed at a very high speed because the buffer management unit 5 of each buffer is merely marked as invalid. The file management system 3
The contents of the buffer are invalidated by the processing 24, and the occupation of the block is released by the processing 25. This allows another program to access the block. The program that accessed this block next exists in the input / output buffer pool 7, but the contents are to be invalidated, so the block is newly input from the file 6. Since the data in the file 6 is the content before the program under test is updated, other programs do not refer to the dirty data. (Effects of the Invention) As described above in detail, according to the present invention, even if the application program in the test mode updates data, it is possible to prevent other programs from referring to the stained data, Even if there is a bug in the test mode application program itself and the processing ends abnormally, it is possible to automatically perform a pause point setting process, mark all data blocks as invalid, and output a file. Since there is no data, careless destruction of data can be prevented. Further, according to the present invention, since a business file can be used for an application program under development, not only the number of test steps is limited but also the effect of improving the quality of the program can be obtained.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 shows a program test system according to an embodiment of the present invention.
Program configuration diagram showing file access method, second
FIG. 5 is a flowchart showing processing of a method for accessing a program test file according to the present invention. 3 ... file management system 6 ... file, input / output buffer pool

Claims (1)

(57) [Claims] In the test mode of the program, the program under test is occupied by the data block on the input / output buffer and updated, and access to the exclusive data block by another program is prohibited. The pause point setting service is maintained by the program until the pause point setting service is issued. When the pause point setting service is issued, the exclusive use of the data block is released and the contents of the data block are displayed in the input / output buffer so that the data block is invalid. A method for accessing a program test file, which comprises preventing output to a file.