JPH05108565A - Dynamically changing system for output buffer size - Google Patents

Abstract

PURPOSE:To change an output buffer size corresponding to a picture definition size without stopping a transaction processing system. CONSTITUTION:When registering the new picture definition on a picture definition storage file 10 while working the transaction processing system, a picture definition registering means 9 reports a picture definition size related to the picture definition to an output buffer size changing means 8. The output buffer size changing means 8 judges the necessity of changing the output buffer size by comparing a current output buffer size stored in an output buffer size storage area 7 with the picture definition size delivered from the picture definition registering means 9. When it is necessary, the new output buffer size is decided and the output buffer size related to an output buffer 6 is changed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an output buffer size dynamically changing method, and more particularly to an output buffer size dynamically changing method in a transaction processing system. The term "transaction processing system" as used herein means that a terminal device and a host computer are connected via a communication line, a message requesting transaction processing is input from the terminal device to the host computer, and the application program in the host computer An output message (output message displayed on a certain screen), which is the execution result, is output to the terminal device.

[0002]

2. Description of the Related Art There is a certain dependency relationship between an output buffer size and a screen definition size (screen definition size related to a screen on which an output message is displayed) in a transaction processing system. That is, a screen having a screen definition size larger than the output buffer size cannot be output, and in order to output a certain screen, an output buffer having an output buffer size larger than the screen definition size related to the screen is defined. Need to be kept.

In the conventional transaction processing system, the output buffer size is fixedly determined by the environment definition, and the output buffer size cannot be changed while the transaction processing system is operating (this This is because there is no means for dynamically checking the output buffer size and the screen definition size like the output buffer size changing means (see later) in the invention).

[0004]

In the conventional technique of the transaction processing system described above, since the output buffer size cannot be changed while the transaction processing system is operating, a screen having a screen definition size larger than the output buffer size cannot be displayed. To output (if you need to increase the output buffer size),
There is a drawback in that the transaction processing system must be stopped to change the environment definition related to the output buffer size.

When a new screen definition is registered during the operation of the transaction processing system (dynamic screen definition registration has been possible conventionally), it attempts to output the screen associated with the screen definition. There was a drawback that sometimes the output buffer size was insufficient and an error occurred.

In view of the above points, an object of the present invention is to register a screen definition size larger than the output buffer size (to prevent an error from occurring when the screen is output), and to set the output buffer size to It is an object of the present invention to provide a method for dynamically changing the output buffer size that eliminates the need to stop the transaction processing system for changing.

[0007]

According to the dynamic output buffer size changing method of the present invention, an output message which is a result of execution of an application program in the host computer when a message requesting transaction processing is input from the terminal device to the host computer. In the transaction processing system in which is output to the terminal device, an output buffer that is a save area of a screen definition related to a screen on which an output message is displayed, and an output buffer size storage area that stores the current output buffer size of this output buffer And a screen definition registration means for notifying the output buffer size changing means of the screen definition size related to the screen definition when registering a new screen definition in the screen definition storage file while the transaction processing system is operating, and this screen definition registration hand The necessity of changing the output buffer size is determined by comparing the screen definition size passed from the device with the output buffer size stored in the output buffer size storage area, and a new output buffer size is set if necessary. The output buffer size changing means for determining and changing the output buffer size of the output buffer.

[0008]

In the dynamic output buffer size changing method of the present invention, the output buffer plays the role of a save area for the screen definition relating to the screen on which the output message is displayed, and the output buffer size storage area is the output buffer at the present time The size is stored, and when the screen definition registration means registers a new screen definition in the screen definition storage file while the transaction processing system is operating, it notifies the output buffer size changing means of the screen definition size related to the screen definition,
The output buffer size changing means judges the necessity of changing the output buffer size by comparing the screen definition size passed from the screen definition registering means with the output buffer size stored in the output buffer size storage area. In this case, a new output buffer size is determined and the output buffer size related to the output buffer is changed.

[0009]

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

FIG. 1 is a block diagram showing the configuration of an embodiment of the output buffer size dynamic changing system of the present invention. The output buffer size dynamic changing method of the present embodiment includes a terminal device 1, a message input means 2, a transaction execution control means 3, an application program 4, a message output means 5, an output buffer 6, and an output buffer size. Storage area 7, output buffer size changing means 8,
The screen definition registration means 9 and the screen definition storage file 10 are included. The components indicated by reference numerals 2 to 9 belong to the host computer. The host computer, the terminal device 1, and the screen definition storage file 10 are included in the transaction processing system to which the output buffer size dynamic changing method of this embodiment is applied.

FIG. 2 is a flow chart showing the processing of the output buffer size changing means 8. This processing includes a screen definition size acquisition step 81, an output buffer size acquisition step 82, a screen definition size / output buffer size comparison step 83, an output buffer size determination step 84,
It comprises an output buffer size storing step 85 and an output buffer size expanding step 86.

Next, the operation of the output buffer size dynamic changing system of the present embodiment thus constructed will be described.

First, during the operation of the transaction processing system, a certain process (a process by executing the application program 4) is performed based on a request (a message requesting a transaction process) from the terminal device 1, and the result is the execution result. A series of operations when the output message is output to the terminal device 1 will be described (note that this operation is also performed in the related art).

When a message requesting transaction processing is input from the terminal device 1 to the host computer, the message input means 2 receives the message and the transaction execution control means 3 receives the message.
Pass to.

The transaction execution control means 3 activates a task to process the message passed from the message input means 2, passes the message to the application program 4 related to the task, and controls the execution of the application program 4. The output message designated by the application program 4 (the output message for the terminal device 1 which is the execution result of the application program 4) and the screen definition name of the screen on which the output message is displayed are passed to the message output means 5.

The message output means 5 stores the screen definition corresponding to the screen definition name passed from the transaction execution control means 3 in the screen definition storage file 10 (a plurality of screen definitions are registered in the screen definition storage file 10). To read to the output buffer 6 (the output buffer 6 serves as a save area for the screen definition), and output message to the terminal device 1 using the screen definition (output message passed from the transaction execution control means 3). ) Is output on the screen.

Next, the operation when the size of the output buffer 6 (output buffer size) is dynamically changed (during operation of the transaction processing system) will be described (see FIG. 2). The output buffer size when the transaction processing system is started is determined by the screen definition storage file 10
A size is set that can support the largest screen definition size related to the screen definition initially registered in (this setting can be realized by a conventional technique).

The screen definition registration means 9 registers a new screen definition in the screen definition storage file 10 at any time during the operation of the transaction processing system. At the same time, the screen definition registration means 9 notifies the output buffer size changing means 8 of the screen definition size related to the screen definition registered in the screen definition storage file 10.

The output buffer size changing means 8 acquires the screen definition size from the screen definition registration means 9 (step 8).
1) The current output buffer size is acquired from the output buffer size storage area 7 (step 82), the screen definition size acquired in step 81 is compared with the output buffer size acquired in step 82, and the screen definition size is output. It is determined whether the buffer size is exceeded (step 83).

When it is determined in step 83 that the screen definition size exceeds the output buffer size, the output buffer size changing means 8 determines the output buffer size to be the same size as the screen definition size (step 8
4) store the output buffer size determined in step 84 in the output buffer size storage area 7 (step 85),
The output buffer 6 is expanded to the output buffer size determined in step 84 (step 86), and the process ends.

When it is determined in step 83 that the screen definition size does not exceed the output buffer size, the output buffer size changing means 8 ends the process.

[0022]

As described above, according to the present invention, output buffer size changing means or the like is provided to dynamically change (expand) the output buffer size when registering a new screen definition during operation of the transaction processing system. By enabling it, there is an effect that a screen having a screen definition size larger than the output buffer size up to that point can be registered without causing an error.

Further, as described above, there is an effect that it is not necessary to stop the transaction processing system to change the output buffer size (environment definition related to the output buffer size).

[Brief description of drawings]

FIG. 1 is a block diagram showing the configuration of an embodiment of the present invention.

FIG. 2 is a flowchart showing a process of an output buffer size changing means in FIG.

[Explanation of symbols]

 1 terminal device 2 message input means 3 transaction execution control means 4 application program 5 message output means 6 output buffer 7 output buffer size storage area 8 output buffer size changing means 9 screen definition registration means 10 screen definition storage file

Claims (1)

[Claims] 1. A transaction processing system in which a message requesting transaction processing is input from a terminal device to a host computer, and an output message, which is the execution result of an application program in the host computer, is output to the terminal device. An output buffer that is a screen definition save area for the displayed screen, an output buffer size storage area that stores the current output buffer size of this output buffer, and a screen definition storage file during operation of the transaction processing system. Screen definition registration means for notifying the output buffer size changing means of the screen definition size relating to the screen definition when registering a new screen definition, and the screen definition size passed from the screen definition registration means and the output buffer size record. The necessity of changing the output buffer size is determined by comparing with the output buffer size stored in the area, and if necessary, a new output buffer size is determined and the output buffer size related to the output buffer is changed. And an output buffer size changing means for executing the output buffer size changing method.