JP2000305764A - Program system for computer - Google Patents

Abstract

PROBLEM TO BE SOLVED: To quickly operate task processing at the time of the re-start of a GUI part. SOLUTION: A task application is divided into a GUI part 110 and an object server part 120. At the time of receiving a request for the preparation of an object from the GUI part 110, a component management object 121 registers the information of the generated object in a component management table 122 and returns an object reference to the GUI part 110. The GUI part 110 method-calls objects A-C on the basis of this. Even when any failure is generated, the object information is not deleted by the component management object 121 so that the activated state can be held.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a computer program system capable of immediately continuing an application program when a process for displaying an image is restarted even when the process is stopped.

[0002]

2. Description of the Related Art In recent years, a system that calls a plurality of component programs on a computer system, dynamically incorporates them into one application program as software components, and executes the application program has been widely used.

In such a system, component programs can be dynamically incorporated into various programs, so that component programs can be reused.
For example, a business application for processing a cash dispenser or a branch office terminal business is also one of the program execution systems using binary software components in a binary format, and the business is executed by calling the components as necessary. .

Conventionally, when a critical business is executed, a business application is constructed in a client-server format and has a three-layer structure. The first to third layers are respectively GUI (Graphical User Int.)
erface) layer, business logic layer, and data layer.

[0005] The GUI layer is a layer for displaying a screen to the user so that the user can interact with the computer, and processing user information input from an input device such as a keyboard. For example, WE
B browser is used.

The business logic layer is a layer that performs common processing based on data such as input user information and the like, and performs a business processing sequence and gives instructions to a database or a host computer. For example, a savings account object and a loan simulation object in a bank teller terminal correspond to this business logic.
The data layer is a layer such as a database stored in a host computer, for example.

In such a client-server type application program, three processes are generally distributed to a plurality of computers. That is, the business logic layer has a transaction function, and when a failure occurs in the GUI layer, the business logic layer invalidates (rolls back) the processing performed so far, and the failure occurs in the business logic layer. If the data tier also disables updates to the database, and in the event of a data tier failure, use the data tier recovery feature to disable processing and take action to prevent data inconsistencies. ing.

[0008]

However, since such a conventional computer program system has such a three-layer structure, even if a failure occurs in any process of the three-layer structure, the entire business becomes invalid. , It is necessary to start over from the beginning.

In particular, W used in the GUI layer of the business terminal
The reliability of the EB browser is low, and a failure due to, for example, a process fault is likely to occur. Further, in this WEB browser, a memory leak such as forgetting to release an unused memory is likely to occur. Therefore, in order to perform long-term business processing, it is necessary to terminate the process, periodically inspect the GUI layer, and monitor the memory usage.

[0010] As described above, if the entire business is stopped due to a failure in the GUI layer, business processing must be performed from the beginning when the GUI layer is restarted, and the efficiency of the business is reduced. Therefore, there is a need for a computer program system capable of performing business operations immediately upon restarting even if the GUI layer is stopped.

[0011]

The present invention employs the following structure to solve the above problems. <Configuration 1> A computer program system according to the first aspect of the present invention issues a request for generation of a screen display object necessary for screen display to a user of the computer, receives a generation result of the screen display object, and receives a screen display object. Screen display processing means for making a method call directly to the server, receiving the obtained processing result and displaying the screen, and, upon receiving the generation request from the screen display processing means, calling a predetermined component program to display the screen. Object management means for activating the object, returning the activated generation result of the screen display object to the screen display processing means, and maintaining and managing the image display object until receiving a deletion request from the image display processing means. Configured to run application programs To have.

<Structure 2> In the computer program system according to the second aspect of the present invention, the object management means includes: an object management table for recording object information on the activated screen display object; When activated, the object information is registered in the object management table, and when a deletion request is received, a component management object that deletes the object information from the object management table is provided to maintain the image display object. It is configured as follows.

<Structure 3> In the computer program system according to the third aspect of the present invention, when the object management means receives a request for generating a screen display object from the screen display processing means, the object display means includes the screen display object and the screen display processing means. The screen display processing means is configured to record its own processing progress status in the recording object.

[0014]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below using specific examples. <Specific Example 1> In the specific example 1, the application program is divided into a GUI unit that is a process for performing image display processing and a management unit that is a process for managing objects, and the stopped GUI unit is restarted. This allows business operations to be performed immediately.

FIG. 1 is a block diagram showing the configuration of a business application 100 according to a first embodiment that operates on a computer. In the first specific example, a case where the business application 100 is used for a banking business will be described as an example.

FIG. 2 is a block diagram showing a configuration of a computer system on which the business application 100 for banking business operates. This computer system is C
It is configured by connecting a host computer 1 having a PU or the like, a magnetic disk device 2 and business terminals 3-1 to n via a dedicated line 4. This business terminal 3
Numerals −1 to n are, for example, a cash dispenser, a bank teller terminal, etc. arranged at a bank teller.

The business application 100 shown in FIG.
Is deployed as software on this computer system. This business application 100 is
It is divided into an I unit 110 and an object server unit 120. In FIG. 1, the business application 100 is provided with one GUI unit 110 and one object server unit 120, but a plurality of GUI units and object server units 120 may be provided.

The GUI unit 110 and the object server unit 120 may be arranged on the same computer,
It may be located on a different computer. GUI unit 110
Is a process for performing screen display, input from a user, and the like, and includes a business program 111.

The business program 111 is a program for controlling display of a screen and acceptance of input to determine and execute a flow of business processing. For example, WEB
When a browser is implemented, the business program 111 is defined in HTML, and its operation is described by a script.

The object server section 120 is a process for managing objects, and includes a component management object 121 and a component management table 12.
2 is provided.

Component management object 121
Is an object that receives a component object generation request, a reference request, and a deletion request from the business program 111 of the GUI unit 110, and requests the system object management unit 130 to generate a component object based on these requests.

The objects A to C are objects activated by executing the loaded component, and the objects include a GUI unit 11.
0 also includes a recording object for recording the progress of processing.

The object information is registered in the component management table 122 by the component management object 121. FIG. 3 is an explanatory diagram showing an example of object information registered in the component management table 122.

The object name is the name of an object given to each object, and is used when specifying an object. The object reference is G
A request to generate an object, a reference request,
Data that is returned when a deletion request is received,
Used as an object identifier when executing a program. The component identifier is an identifier for identifying a component.

The component registration information file 131
Is a file storing information such as the file name, storage location, and operation location of the component. The storage location of this file may be in its own computer or another computer.

The component file 132 is a file storing components. This component is simply an executable file unless activated (converted into an object).

The system object management unit 130 is provided by the system or other middleware software. When an object generation request is received from the object server unit 120, the system object management unit 130 refers to the component registration information file 131 to read the component file 132. This is a block that takes out a target component from and generates an object.

The GUI unit corresponds to a screen display processing unit, and includes an object server unit 120, a system object management unit 130, and a component registration information file 13.
1 and the component file correspond to the object management means.

<Operation of Embodiment 1> FIG. 4 is a flowchart showing the operation of Embodiment 1. Steps 11 to 13
Are steps executed by the GUI unit 110, and steps 21 to 25 are steps executed by the object server unit 120.

At step (in the figure, the step is described as "S") 11, the GUI unit 110 displays an initial screen. Request to create an object with the argument as an argument. For example, when opening a savings account,
A request is made to generate an object including an ordinary account opening object in the objects A to C.

In response to the generation request, the component management object 121 executes step 21 and determines whether the same object exists in the component management table 122.

When the same object exists,
Since the object requested to be created has already been created, the process directly proceeds to step 23. If the same object does not exist, the process proceeds to step 22 in which the system object management unit 130 is instructed to specify the component identifier and generate the object. Request.

In response to the request, the system object management unit 130 refers to the component registration information file 131, checks the component registration information, extracts a component from the component file 132, executes the component, and executes the component.
To generate objects AC.

When the objects A to C are normally generated, the system object management unit 130 sends an object reference to the object server unit 120. As shown in FIG. 3, the component management object 121 registers the returned object reference, the object name of the generated object, and the component identifier in the component management table 122.

In step 23, the object reference is returned to the GUI unit 110 as a return value of the object generation request. Thereby, the GUI unit 11
0 indicates that the required object is the object server unit 12
It recognizes that it exists at 0.

Then, the GUI unit 110 determines in step 12
And perform operations on the object by calling the methods provided by the generated object. For example, when performing an account opening process for a savings account, the user directly operates an object for opening a savings account. This processing result is recorded in the recording object.

In the object server section 120, step 24 is executed in response to this method call, and the method called by each of the objects A to C is executed. When the account opening process is performed in the business terminal 3-1, an account opening object is called, and data necessary for opening an account is displayed on the business terminal 3-1. With this display, the user inputs data while interacting with the business terminal 3-1.

At this time, the component management object 121 is not involved in each method call and the GUI unit 11
0 and each of the objects A to C directly transfer a method call and a return value, and the execution result is returned to the GUI unit 110 as a return value.

When this business process is completed, the GUI unit 1
10 executes step 13 and requests deletion of each of the objects A to C. Component management object 12
1 receives this deletion request, executes step 25, and requests the system object management unit 130 to delete the objects A to C.

In response to the request, the system object management unit 130 deletes the objects A to C. The component management object 121 stores the object names, object references, and component identifiers of the registered objects A to C in the component management table. 122.

Next, for example, during execution of step 12,
When a failure occurs in the screen display processing or the like and the GUI unit 110 stops, or when the GUI unit 110 is
When the UI unit 110 is stopped, since the component management object 121 has not received a request to delete the objects A to C, the object information is not deleted from the component management table 122, and the activated states of the objects A to C are retained. .

When the GUI unit 110 is restarted, the GUI unit 110 executes step 11 and issues a request for generating the necessary objects A to C in the same manner. At this time, the activation state of the objects A to C is maintained,
Since all the object information is registered in the component management table 122, the component management object 121 does not generate the objects A to C, and the object references of the objects A to C are returned to the GUI unit 110.

When this object reference is returned, the GUI unit 110 refers to the progress of processing recorded in the recording object, and
, A method call is made, and business processing is continuously executed.

<Effects of Specific Example 1> According to the specific example 1 as described above, the business application is connected to the GUI unit 1.
Since the process is divided into the object 10 and the object server unit 120, even when a failure occurs in the GUI unit 110 and the process ends, the generated object is protected from the failure in the GUI unit 110.

Since the activation state of the object is maintained by the object server unit 120, the GU
When the I unit 110 is restarted, the task can be continued by reusing the object. Therefore, the present invention is effective for a mission critical terminal business application using components, such as a business application in a cash dispenser or a branch office terminal.

Further, G, which is liable to cause a memory leak,
There is also an effect that the business can be executed by releasing the UI unit 110.

[Brief description of the drawings]

FIG. 1 is a block diagram illustrating a configuration of a business program according to a first embodiment of the present invention.

FIG. 2 is a block diagram illustrating a configuration of a computer system on which a business program of a specific example 1 operates.

FIG. 3 is an explanatory diagram illustrating an example of object information registered in a component management table of a specific example 1.

FIG. 4 is a flowchart illustrating an operation of a specific example 1.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 100 Business application 110 GUI part 120 Object server part 121 Component management object 122 Component management table 130 System object management part 131 Component registration information file 132 Component file

Claims (3)

[Claims] An input process is performed while displaying data on a screen for a user of a computer, a necessary component program is called based on the input data, and the component program is incorporated into an application program. In a program system of a computer executing a program, a request for generating a screen display object required for the screen display is issued, a generation result of the screen display object is received, and a method call is directly performed on the screen display object. Screen display processing means for receiving the processing result and displaying the screen, and upon receiving the generation request from the screen display processing means, activates a screen display object by calling a predetermined component program and activates the activated screen display Oh Object generation means for returning a generation result of the object to the screen display processing means and for maintaining the image display object until receiving a deletion request from the image display processing means, and executing the application program. A computer program system, characterized in that: 2. An object management unit comprising: an object management table for recording object information relating to an activated screen display object; and when the screen display object is activated, the object information is registered in the object management table. And
2. The computer according to claim 1, further comprising: a component management object for deleting the object information from the object management table when receiving the deletion request, and maintaining the image display object. Program system. 3. The object management means, when receiving a screen display object generation request from the screen display processing means, activates a recording object of the screen display processing means together with the screen display object. The computer program system according to claim 1, wherein the processing progress is recorded in the recording object.