JPH05134917A - Data processing system for data processor - Google Patents

Abstract

PURPOSE:To automatically perform a processing corresponding to a relevant field contained in a file just by giving an access to the field through an application program. CONSTITUTION:When an access request is given to a field 151 contained in a file 15 from an application program 11, an access pre-processing execution means 121 carries out the access pre-processing 13 that is registered in response to the field 151. Then an access grant deciding means 122 grants or inhibits the access to be given to the field 151 based on the result of the processing 13. A field access means 123 gives an access to the field 151 if the access is granted. Meanwhile an access post-processing execution means 124 carries out the access post-processing 14 registered in response to the field 151 after an access is given to the field 151.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a data processing system for a data processing device, and more particularly to a data processing system for a data processing device which requires complicated data processing.

[0002]

2. Description of the Related Art Conventionally, in this type of data processing system, processing for each field in a file is defined and processed for each application program.

[0003]

In the above-described conventional data processing method, the processing for each field in the file is defined and processed for each application program, so that the same kind of processing is installed for each of a plurality of application programs. It had to be done, and had the disadvantage of being wasteful.

Further, if there is even one application program that does not process each field, the consistency of the processing for the file cannot be maintained, which causes a problem in operability and data integrity in the file. There was a drawback that it was more likely.

Further, there is a means for incorporating a process for operating data in a file into the operating system,
Since the structure of the data in the file is determined by the user of the data processing device, it is impossible for the operating system to provide the processing at the time of data operation corresponding to all the data structures.

In view of the above points, an object of the present invention is to allow a process associated with a field to automatically operate only by accessing a field in a file from an application program running on a data processing device. To provide a data processing method of the data processing device.

[0007]

A data processing method of a data processing apparatus according to the present invention corresponds to a divided significant field in a file in a data processing apparatus having an operating system for storing and processing data in a file format. Pre-access processing and post-access processing registered by the above, access pre-processing execution means for executing the access pre-processing associated with the field in the file, and access by the access pre-processing execution means Access permission determining means for determining whether or not access to the field is possible according to the result of the preprocessing, field access means for accessing the field when access is permitted by the access permission determining means, and field access Fees by means And an access postprocessing execution means for executing an access post-processing associated with the field after de access.

[0008]

According to the data processing method of the data processing apparatus of the present invention, a file used on the data processing apparatus is divided into significant fields, and pre-access processing is performed for each field before the field is accessed. Register the post-access processing to be performed after the field is accessed, and when the application program accesses the field, first execute the pre-access processing registered corresponding to the field to be accessed. In this pre-access process, change the data to be accessed as necessary and determine whether to permit access to this field. If access is permitted, access (reference or update) to this field is performed. Finally, the post-access processing registered for this field is executed. To.

[0009]

The present invention will be described in detail with reference to the drawings.

FIG. 1 is a block diagram showing the configuration of a data processing apparatus 1 to which a data processing method according to an embodiment of the present invention is applied. This data processing device 1 executes an application program 11 that operates inside, an operating system 12, and a process executed before the access when the operating system 12 accesses the field 151 in the file 15 at the request of the application program 11 ( Hereinafter referred to as access preprocessing) 13
And a file 15 divided into significant fields 151 and a process to be executed after the access (hereinafter, referred to as post-access process) 14.

The application program 11 includes a field access 111.

The operating system 12 includes an access preprocessing executing means 121 and an access permission determining means 12
2, field access means 123, and post-access processing execution means 124.

The file 15 contains a divided significant field 151.

FIG. 2 is a diagram showing an example of the internal structure of the file 15. Significant fields 15 in file 15
When divided by 1, the management information 15 in the file 15 necessary for registering the pre-access processing 13 and the post-access processing 14 for each field 151
2 is stored in the management area provided in the file 15. Pre-access processing 1 specified by management information 152
3 and the post-access process 14 are executable files, and these processes are executed by the operating system 1.
Follow the standard program start-up that 2 has.

Next, the operation of the data processing system of the data processing apparatus of the present embodiment thus constructed will be described. Here, the application program 11 is started by the user of the data processing device 1, and the file 15
The case of accessing the field 151 in the inside will be described as an example.

First, the access 111 of the field 151 in the file 15 in the application program 11 is accessed.
Request occurs, the access request is passed to the operating system 12 and processed.

In the operating system 12, first, the access preprocessing execution means 121 causes the file 1
The pre-access process 13 registered corresponding to the access-requested field 151 in 5 is executed.

The pre-access processing 13 is started by obtaining the management information 152 of the field 151 requested to be accessed from the management area in the file 15 in accordance with the file structure shown in FIG. The execution format file of the pre-access process 13 is obtained from the designated information, and this is started.

After the pre-access process 13 is executed, the completion result of the pre-access process 13 is returned to the operating system 12.

When it is judged in the access pre-processing 13 whether or not the access to the requested field 151 is permitted, the pre-access processing 13 notifies the operating system 12 of whether or not the access is permitted based on the judgment result. It is possible (if the access permission / prohibition determination processing is not performed in the pre-access processing 13, the completion notification is set to the access enabled state).

Next, in the operating system 12, the access permission decision means 122 judges the completion notice from the pre-access process 13 and immediately notifies the application program 11 when the inaccessibility is notified.
When the control is returned to (1) and access is notified, the field access unit 123 accesses the designated field 151.

Finally, the post-access processing 14 is executed by the post-access processing executing means 124. This is the same as the pre-access processing 13 with the management information 1 in the file 15.
The execution format file of the post-access processing 14 is obtained from 52, and this is executed in a form of being activated.

When the post-access processing 14 is completed, the operating system 12 returns the control to the application program 11 to complete the access of the field 151.

If the pre-access process 13 and the post-access process 14 are not registered, the respective activation processes are not performed.

Here, assuming an operating system 12 capable of obtaining the name or group name of the user who has started the application program 11 requesting access to the field, the user belongs to a specific user or a specific group. Explain the case where only the users who are allowed to access the field. In this case,
Pre-access processing 1 using only pre-access processing 13
Inquiry of the user name or belonging group name to the operating system 12 in 3 and compares this with the user name or belonging group name that is permitted to access. To return. As a result, the data protection process can be realized in the unit of the field 151 in the file 15.

Next, a case will be described in which, when a specific field 151 in the file 15 is accessed, other fields or fields of another file are automatically updated in conjunction with each other. In this case, post-access processing 13
Field 15 for which access was requested using only
After the access of 1, the field (in the same file 15 or in another file) which is desired to be updated in conjunction is updated. If necessary, the data in another field may be referenced to perform an operation with the requested data in the field 151 at the time of access to obtain updated data.

When measuring the access frequency of a specific field 151 in the file 15, either the pre-access process 13 or the post-access process 14 is used to count the number of accesses.

Next, the confirmation of the access status to the file 15 will be described. In both the pre-access processing 13 and the post-access processing 14, the access data is displayed on the terminal in each processing.
As a result, it becomes possible to visually confirm the access contents of the requested access field 151 in the file 15.

Next, the case where the file 15 is duplicated will be described. In this case, the access preprocessing 13 is used when updating the data in the field 151.
In the pre-access process 13, in the case of update access, a process of writing update data to the field at the same position of a separately prepared file is performed. At the time of referring to data, the post-access process 14 is used to read data from the same field of another file that is being written at the time of update when the access to the requested field fails due to a read failure. This makes one file 1
Even if the file 5 cannot be read due to a failure, the data can be processed by automatically switching to another file.

Finally, a description will be given of the processing when the fields are defined in the file 15 by being multiplexed and the pre-access processing 13 and the post-access processing 14 are registered in each field. Field 15 you tried to access
If 1 is the same as the position defined in another field (when the same area is defined as multiple fields), pre-access processing 13 registered in all fields defined by multiplexing By executing the post-access processing 14 and one field 1
A plurality of processes can be activated when 51 is accessed. This makes it possible to use some processes in combination.

[0031]

As described above, according to the present invention, the operating system is provided with the pre-access processing executing means, the access permission determining means, the field access means, and the post-access processing executing means to access the fields in the file. In this case, if pre-access processing and post-access processing to be performed before and after the access are prepared and registered, there is an effect that advanced file processing can be easily realized without creating a complicated application program.

Further, the application program only needs to perform simple file input / output, and even when complicated operation of data on the file is required, processing is performed by a combination of simple field pre-access processing and post-access processing. This is also possible, and as a result, complicated programming is not required and the productivity and reliability of the program can be improved.

[Brief description of drawings]

FIG. 1 is a block diagram showing a configuration of a data processing device to which a data processing method according to an embodiment of the present invention is applied.

FIG. 2 is a diagram showing an example of the structure of a file used in the data processing method of the data processing apparatus of this embodiment.

[Explanation of symbols]

 1 Data Processing Device 11 Application Program 12 Operating System 13 Access Pre-Processing 14 Access Post-Processing 15 File 111 Field Access 121 Access Pre-Processing Execution Unit 122 Access Permission Determining Unit 123 Field Accessing Unit 124 Access Post-Processing Execution Unit 151 Field 152 Management Information

Claims (8)

[Claims] 1. A data processing device comprising an operating system for storing and processing data in a file format, and pre-access processing and post-access processing registered corresponding to divided significant fields in the file, and the file. An access pre-processing executing means for executing a pre-access processing associated with the field at the time of access to the field in the Access permission determining means to perform, field access means to access the field when access is permitted by the access permission determining means, and access to the field associated with the field after the field access by the field access means Data processing method for data processing apparatus characterized by having an access postprocessing execution means for executing post-processing. 2. As the pre-access process, a process of checking the name and / or group name of a user who is trying to access the field and determining whether or not the user has the right to access the field. 2. The data processing method of the data processing apparatus according to claim 1, wherein the data protection is enabled for each field in the file by registering the data and registering nothing as the post-access processing. 3. No data is registered as the pre-access processing, and the access data and the data of other fields in the file including the accessed field are operated as the post-access processing, and data obtained as a result of the operation is used. By registering a process for updating an arbitrary field in the accessed file, the related field is automatically updated only by accessing the field in the file by the application program. A data processing method of the data processing device according to item 1. 4. Nothing is registered as the pre-access processing, and as the post-access processing, the access data and the data of the field in a file different from the file containing the accessed field are operated to obtain the operation result. By registering the process to update the field in the arbitrary file with the data, the related field in the related file is automatically updated only by accessing the field in the file with the application program. The data processing method of the data processing device according to claim 1, wherein 5. By registering a process for counting the number of accesses as either the pre-access process or the post-access process, it is possible to measure the access frequency of each field without modifying the application program. The data processing system of the data processing device according to claim 1. 6. By registering a process of displaying access data on a terminal as both the pre-access process and the post-access process, it is possible to check the update information of the file without making any modifications to the application program. The data processing method of the data processing device according to claim 1, wherein 7. As the access pre-processing, when the access of the field is an update of the field, a process of writing the access data to a field in a file different from the file including the field to be accessed is registered,
When the access to the field is a reference to the field as the post-access processing, when the reference to the field fails due to a read failure, the data is written from a field in another file in which the access data is written in the pre-access processing. 2. A data processing method for a data processing apparatus according to claim 1, wherein file duplication can be easily realized by registering the process to be read without making any modifications to the application program. 8. A field defined in the file is multiplexed and defined, and by registering the pre-access processing and the post-access processing for each field, another field defined in a certain field is included. When an attempt is made to access a field, by executing both the pre-access processing and the post-access processing registered in both the former field and the latter field, a plurality of processes can be executed at the same time when the field is accessed. The data processing method of the data processing device according to claim 1, wherein the data processing method is executable.