JPH06301560A - Computer task management system - Google Patents

Abstract

PURPOSE:To constitute the computer task management system so that it is unnecessary to describe a representative name of data resources for the purpose of switching, etc., of the data resources in an application program, and also, the same program can be executed simultaneously, and moreover, as for a generated task, one is accessed selectively from in plural data resources being independent, respectively. CONSTITUTION:The system consists of a task generating means 11 for receiving a task actuation request from the outside and generating a task, a management table 12 for showing the correspondence of a representative name of data resources, a task name and a name of a program to be executed, and a task identifier allocated from an OS, and a data access means 13 for determining the data resources to be tasked from the task identifier and accessing the data.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a computer task management system using a workstation that provides a multi-user, multi-task and multi-window environment.

[0002]

2. Description of the Related Art In a workstation for process monitoring control, which is provided with an operating system (hereinafter abbreviated as OS) that provides a multi-user, multi-task and multi-window environment, when one user performs work,
Of the login IDs assigned to each user, the login ID assigned to the user is first used to perform the login procedure. In the post-login environment, in order to concurrently execute application processing that has the same data structure and the same name and selectively handles one of a plurality of independent data resources, It was necessary to explicitly code the data resource switching processing in the program in response to a task activation request from the outside, or to create a program for each data resource. The processing to be performed concurrently in parallel here is, for example, required for performing the following work. (1) Perform the same business process simultaneously on multiple databases with different data and compare the results. (2) When changing the data in the database and repeating the business process and comparing the results, if the calculation time for one time becomes very long, the data change should be performed in parallel without waiting for the end of one process. By doing so, work efficiency will be improved.

When the data resource is a disk file, the resource designation has a hierarchical structure such as "directory at login / representative name of resource / file name", and the representative name of the resource is different for each resource. However, files having the same data structure and the same name exist under each directory. In the method of explicitly describing the switching process, the procedure for switching the representative name of the resource according to the start condition is described in the application program. The main memory data is the same as a disk file if the OS provides a main memory file management system, but in the method of allocating the start address of each resource by the memory allocation function, the start address corresponding to the representative name of the resource Was switched according to the data resource name specified when the task was started. On the other hand, in the method of creating a program for each resource, switching processing is not necessary, but the representative name of the resource is fixedly described. Further, in response to an external task activation request, it is necessary to prepare a management means for selecting a program to be activated according to the data resource used. Also, when data resources were added, both methods required modification of the application program.

[0004]

As described above, in addition to the processing necessary for the original business, the switching processing of the data resource is explicitly described in the application program,
Alternatively, in the method of creating a program for each data resource, the representative name of the data resource is described in the program, and it is necessary to modify all programs that use the data resource when the number of data resources or the representative name is changed. Is. Therefore, it is necessary to change the description of the application program when changing the number of data resources or the representative name, and when porting the program to other process monitoring and control systems, which has the drawback of degrading program maintainability and portability. It was The present invention has been made in view of the above circumstances, and it is possible to simultaneously execute the same program without having to describe the representative name of the data resource for switching the data resource in the application program. In addition, it is an object of the present invention to provide a computer task management system capable of selectively accessing one of a plurality of independently generated data resources.

[0005]

The present invention will be described with reference to FIG. 1 corresponding to an embodiment. A task activation request from the outside will be described.
Task generation means 11 for receiving a task in response to 14, a management table 12 showing the correspondence between the representative name of the data resource, the task name, the program name to be executed, and the task identifier assigned by the OS, and access from the task identifier The data access means 13 determines a data resource to be accessed and accesses the data.

In the processing request 14 from the outside, the task name and the representative name of the data resource are designated. Upon receiving the processing request, the task generation means 11 searches the management table 12 for the program name to be executed using the given task name and the representative name of the data resource. Next, the OS is requested to execute the retrieved program, and the generated task identifier is received from the OS. The received task identifier is stored in the management table 12. The data access of the data resource in the generation task 15 is performed via the data access means 13, but the task only specifies the data name to be accessed and does not need to specify the data resource representative name.
The data access means 13 takes in the identifier of the task that is the source of the data access, determines the data resource to be accessed from the data resources 16 to 18 using the management table 12, and accesses the requested data. .

[0006]

Embodiments will be described below with reference to the drawings. Figure 1
FIG. 1 is a configuration diagram of an embodiment for explaining a computer task management system according to the present invention. In FIG. 1, 11 is a task generation means for generating a task in response to an external task activation request 14, and 12 is a correspondence between a representative name of a data resource, a task name, a program name to be executed, and a task identifier assigned by the OS. Is a management table (details will be described later), 13 is a data access means for deciding a data resource to be accessed from the task identifier and accessing the data, 15, 15 '.
Is a generation task, 16 is a database that stores online data, 17 is a database that stores past performance data, 18 is a database that stores prediction data, and each database has an area for storing calculation results. . In the example of FIG. 1, file / online / inputdat is used as calculation input data for online data.
a is a file / online / as calculation result data
outdata is prepared. For actual data and forecast data, representative name of data resource online
Replaces record or predict, but the file names inputdata and outdata are the same. The correspondence relationship shown in FIG. 2 is defined in the management table 12 in advance. A multi-window type man-machine device shown in FIG. 3 is prepared in order to perform a system analysis calculation of a power system. The multi-window includes a window 31 for online data calculation, a window 32 for calculation based on past performance data, and a window 33 for calculation based on future prediction data.

Next, the operation will be described. First of all, the windows are independent of each other and can work independently. When a request to start calculation process 1 is issued from the window 31 for online calculation, "onli
The designation of “ne” and “calculation task 1” is notified to the task generation means 11. The task generation means 11 searches the management table 12 for the program "calculation process 1" to be started, and requests the OS to execute the program having the searched name, thereby generating the task. The task identifier “1001” obtained from the OS at the time of the program execution request is the management table 12
Stored in. In the generated processing in task 15, first, a request for reading calculation input data is issued. At this time,
The data access means 13 is notified of the file name inputdata from the task 15. Data access method
In 13, the task identifier “1001” of the request source is fetched,
Data resource representative name online from the management table 12
To get Next, data file / online / inp
The calculation input data is read from utdata and passed to task 15. In task 15, a calculation is performed using the read data and a request for writing the calculation result is made. In the write request, the task notifies the data access means 13 of the file name outdata and the calculation result data. The data access unit 13 obtains the data resource representative name from the task identifier and writes the calculation result data to the data file / online / outdata, as in the case of reading the data. In addition, a window for performing calculations based on actual data
With respect to the calculation processing request from 32 and the calculation processing request from the window 33 for performing calculation with prediction data, the designation of the data resource representative name at the time of the request is set to record and p, respectively.
The file name specification at the time of requesting data access from the task may be the same as in the case of online calculation, only in place of detect. According to the above-described embodiment, when performing system analysis calculation using any of online data, actual data, and prediction data, it is possible to use one program from the outside without describing the database selection process in the calculation program. It is possible to generate a task that selectively uses a plurality of databases according to the processing request of. It is also possible to generate multiple tasks simultaneously. Although three types of data resources, online, record, and predict have been described in the present embodiment, the number of data resources targeted by the present invention is not limited to three.

[0008]

As described above, according to the present invention, when one data resource is selectively accessed by an application program among a plurality of data resources having the same data structure and the same data name, There is no need to explicitly describe switching of data resources in the application program. Therefore, it is very effective not only for reducing the development man-hours of the application program but also for improving the portability of the program.

[Brief description of drawings]

FIG. 1 is a configuration diagram of an embodiment for explaining a computer task management system according to the present invention.

FIG. 2 is an example diagram showing the contents of a task management table.

FIG. 3 is a diagram showing a display example of a multi-window man-machine device.

[Explanation of symbols]

 11 Task generation means 12 Management table 13 Data access means 14 Processing requests 15, 15 'Generation task 16 Online database 17 Actual database 18 Prediction database

Claims (1)

[Claims] 1. In a process monitoring control workstation having a multi-user, multi-tasking and multi-window environment, a plurality of data resources having the same data structure and the same name, and one of these data resources are provided. A management table showing the correspondence between the task name of the processing task and the program name to be executed, and a task activation request from the outside and the data resource name specified at the time of the activation request are received to refer to the management table and have the corresponding task name. Task generation means for generating a task
A computer task management method comprising: a data access means for determining a representative name of a data resource to be accessed from a task identifier assigned by an operating system when a task is generated and accessing data from the data resource.