JP2005063340A - System for asynchronous update of screen, method for asynchronous update of screen, and program for asynchronous update of screen - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To update a screen displayed on a terminal by a Web application in response to an operation from a server. <P>SOLUTION: A terminal 102 inputs update information for updating a screen displayed on the terminal apparatus 101 to notify it to an input means 108. The input means 108 store the update information as display information in storing means 110. The input means 108 outputs a display update notification to update a notifying means 105. The update notifying means 105 outputs the display update notification to an update monitoring means 107 via JMS 109. The update monitoring means 107 notifies a command to reload a frame screen 501 to a display control means 106. The display control means 106 indicates an update monitoring screen 502 to reload the frame screen 501, and issues a screen display request to a display means 104 to reload all including an information display screen 503 included in the frame screen 501. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a screen asynchronous update system, a screen asynchronous update method, and a screen asynchronous update program. More particularly, the present invention relates to a screen asynchronous update system using Java, a screen asynchronous update method, and a screen asynchronous update program.

  For example, as a technology related to Java, “a general Java servlet automatically generates a message for calling a COBOL application under a transaction processing system based on a user interface XML source in response to a request from a Web browser, “Technology for receiving a result processed by the transaction processing system as a message, generating HTML for displaying the received message on a Web browser based on the user interface XML source, and returning it as a response to a request from the Web browser” is there. (Patent Document 1)

JP 2003-114874 A

  The conventional technology is based on the premise of synchronous processing from input operation to display screen update, and asynchronous processing such as sequential update of the display screen has to arrange special parts such as applets on the display terminal side. For this reason, it is necessary to prepare an environment in which the applet operates on the display terminal side, and it has been difficult to implement asynchronous screen update processing in a Thin client in which the applet does not operate only with a WWW browser.

  The objective of this invention is enabling it to update the screen displayed on a terminal device by operation from a server in a WEB application.

  The first screen asynchronous update system of the present invention includes a first terminal device that notifies a screen display request when a screen reload request is received, and a second terminal device that notifies update information for updating the screen. A display means, a storage means for storing display information, a Java virtual machine, a Java messaging service, an input means operating on the Java virtual machine, an update notification means, an update monitoring means, a display control means, Receiving the screen display request from the first terminal device, notifying the display means and the update monitoring means, sending an update monitoring screen and a frame screen including an information display screen to the first terminal device; When receiving a frame screen reload instruction, the display control means for notifying the first terminal device of a screen reload request, and receiving a screen display request, The information display screen is generated based on the display information in the storage means, the display means passed to the display control means, the non-display update monitoring screen is generated and passed to the display control means, and a display update notification is sent. When received, the update monitoring means for passing an instruction to re-read the frame screen to the display control means, the update information from the second terminal is received and stored as display information in the storage means, and the update notification means The input means for outputting the display update notification, and the update notification means for outputting the display update notification to the update monitoring means through the Java messaging service.

  The asynchronous update system for a second screen of the present invention is the asynchronous update system for the first screen, and when the time-out wait is timed out, the update for transferring the frame screen reload instruction to the display control means It has a monitoring means.

  An asynchronous update system for a third screen of the present invention includes a first terminal device that notifies a screen display request when a screen reload request is received, a second terminal device that notifies update date / time update information, a display means, A storage means for storing display information; a Java virtual machine; a servlet context; an input means operating on the Java virtual machine; an update notification means; an update monitoring means; a display control means; Receiving the screen display request from a device, notifying the display means and the update monitoring means, sending a frame screen including an update monitoring screen and an information display screen to the first terminal device, and re-reading the frame screen When receiving the instruction, the display control means for notifying the first terminal device of a screen re-reading request; and when receiving the screen display request, the table in the storage means Generating the information display screen based on information and passing the display control means to the display control means; generating the non-display update monitoring screen and passing it to the display control means; The update monitoring means for passing a re-reading instruction to the display control means, the update date and time update information from the second terminal is received and stored as display information in the storage means, and the display update notification is sent to the update notification means And the update notification means for outputting the display update notification to the update monitoring means through the servlet context.

  The asynchronous update system for a fourth screen of the present invention is the asynchronous update system for the third screen, and when the time-out wait is timed out, the update for transferring the frame screen reload instruction to the display control means It has a monitoring means.

  The first screen asynchronous update method of the present invention includes a first terminal device that notifies a screen display request when a screen reload request is received, and a second terminal device that notifies update information for updating the screen. Display means, storage means for storing display information, Java virtual machine, Java messaging service, input means operating on the Java virtual machine, update notification means, update monitoring means, and display control means. The display control means receives the screen display request from the first terminal device, notifies the display means and the update monitoring means, and displays a frame screen including an update monitoring screen and an information display screen as the first display screen. Sending to the terminal device and receiving the frame screen reload instruction, notifying the first terminal device of a screen reload request; and the display means, Upon receipt of the surface display request, the information display screen is generated based on the display information in the storage means and passed to the display control means; and the update monitoring means generates the non-displayed update monitoring screen. Passing to the display control means and receiving a display update notification, passing the frame screen reloading instruction to the display control means; and the input means receiving the update information from the second terminal and storing Storing the display update information into the update notification means and the update notification means outputting the display update notification to the update monitoring means through the Java messaging service. It is characterized by including.

  The asynchronous update method of the second screen of the present invention is the asynchronous update method of the first screen, and when the update monitoring means times out in the waiting for timeout, the display instruction for re-reading the frame screen is displayed. The method includes a step of passing to the control means.

  According to the third method for asynchronously updating a screen of the present invention, a first terminal device that notifies a screen display request when a screen reload request is received, a second terminal device that notifies update date / time update information, display means, The display control means using storage means for storing display information, Java virtual machine, servlet context, input means operating on the Java virtual machine, update notification means, update monitoring means, and display control means Receives the screen display request from the first terminal device, notifies the display means and the update monitoring means, and sends a frame screen including an update monitoring screen and an information display screen to the first terminal device. , Receiving an instruction to reload the frame screen, notifying the first terminal device of a screen reload request; and the display means receives the screen display request. Then, the step of generating the information display screen based on the display information in the storage means and passing it to the display control means, and the update monitoring means generates the non-displayed update monitoring screen and the display control means When the display update notification is received, the step of passing the frame screen reloading instruction to the display control means, and the input means receives the update date / time update information from the second terminal and stores it in the storage means. Storing as display information and outputting the display update notification to the update notification means; and the update notification means outputting the display update notification to the update monitoring means through the servlet context. Features.

  The asynchronous update method of the fourth screen of the present invention is the asynchronous update method of the third screen, and when the update monitoring means times out in waiting for timeout, the display instruction for re-reading the frame screen is displayed. The method includes a step of passing to the control means.

  An asynchronous update program for a first screen of the present invention includes a first terminal device that notifies a screen display request when receiving a screen reload request, and a second terminal device that notifies update information for updating the screen. Display means, storage means for storing display information, Java virtual machine, Java messaging service, input means operating on the Java virtual machine, update notification means, update monitoring means, and display control means. The display control means receives the screen display request from the first terminal device, notifies the display means and the update monitoring means, and displays a frame screen including an update monitoring screen and an information display screen as the first display screen. Sending to the terminal device and receiving an instruction to reload the frame screen, a step of notifying the first terminal device of a screen reload request; Receives the screen display request, generates the information display screen based on the display information in the storage means, passes it to the display control means, and the update monitoring means displays the non-displayed update monitoring screen. Generating and passing to the display control means and receiving a display update notification, passing the frame screen reloading instruction to the display control means; and the input means receiving the update information from the second terminal Storing as display information in the storage means, outputting the display update notification to the update notification means, and outputting the display update notification to the update monitoring means through the Java messaging service. Are executed by a computer.

  The asynchronous update program for the second screen of the present invention is the asynchronous update program for the first screen, and when the update monitoring means times out during a timeout waiting, the display instruction for re-reading the frame screen is displayed. The step of passing to the control means is executed by a computer.

  An asynchronous update program for a third screen of the present invention includes a first terminal device that notifies a screen display request when a screen reload request is received, a second terminal device that notifies update date / time update information, display means, The display control means using storage means for storing display information, Java virtual machine, servlet context, input means operating on the Java virtual machine, update notification means, update monitoring means, and display control means Receives the screen display request from the first terminal device, notifies the display means and the update monitoring means, and sends a frame screen including an update monitoring screen and an information display screen to the first terminal device. , Receiving an instruction to reload the frame screen, notifying the first terminal device of a screen reload request, and the display means includes a screen display request Upon receipt, the step of generating the information display screen based on the display information in the storage means and passing it to the display control means; and the update monitoring means generates the non-displayed update monitoring screen and the display control means When the display update notification is received, the step of passing the frame screen reloading instruction to the display control means, and the input means receives the update date / time update information from the second terminal and stores it in the storage means. Storing as display information and outputting the display update notification to the update notification means, and the update notification means outputting the display update notification to the update monitoring means through the servlet context to a computer It is characterized by making it.

  The asynchronous update program for the fourth screen of the present invention is the asynchronous update program for the third screen, and when the update monitoring means times out in the timeout waiting state, the display instruction for re-reading the frame screen is displayed. The step of passing to the control means is executed by a computer.

  The first effect of the present invention is that, in a WEB application that has conventionally been only a synchronous process from an input operation to a screen update, an asynchronous process can be performed only by server software without placing a process on a display terminal by an applet or the like. is there.

  The reason is that JMS, which is a standard messaging processing mechanism in J2EE (Java (registered trademark) 2 Enterprise Edition), and a non-display update monitoring screen are linked.

  The second effect is that the influence on the screen display due to the update monitoring can be suppressed.

  The reason is that the update monitoring screen is hidden.

  Next, a first best mode for carrying out the present invention will be described in detail with reference to the drawings.

  FIG. 1 is a block diagram showing the configuration of the first best mode of the present invention.

  Referring to FIG. 1, the first best mode of the present invention is an asynchronous update device 100 (for example, a server) that operates under program control, a terminal device 101 (including a WWW browser) that displays a screen, And a terminal device 102 (including a WWW browser) that notifies the update. The asynchronous update apparatus 100 includes a Java virtual machine 103, a display unit 104, an update notification unit 105, a display control unit 106, an update monitoring unit 107, an input unit 108, and a JMS 109 (Java messaging service; Java (registered trademark) Messaging Service). And storage means 110 (memory, hardware disk, etc.).

  The display unit 104, the update notification unit 105, the display control unit 106, and the update monitoring unit 107 operate on the Java virtual machine 103.

  Information input by the terminal device 102 is accumulated in the storage unit 110 as display information by the input unit 108. Further, the update notification unit 105 outputs a display screen update request to the update monitoring unit 107 through the JMS 109. In response to the notification from the update monitoring unit 107, the display control unit 106 acquires an update image of the display screen displayed on the terminal device 101 from the display unit 104 and updates the screen displayed on the terminal device 101.

  Next, the operation of the first best mode of the present invention will be described with reference to the drawings.

  FIG. 2 is a flowchart showing the operation of the first best mode of the present invention.

  FIG. 5 is an explanatory diagram showing the configuration of the display screen.

  An operation of displaying a screen on the terminal device 101 that performs screen display (right) and an operation of inputting information from the terminal device 102 that updates display information (left) will be described.

  Referring to FIG. 2, the terminal device 101 that displays the screen notifies the display control means 106 of a screen display request in order to display the screen that is the target of asynchronous update (step 201 in FIG. 2).

  Next, the display control unit 106 notifies the display unit 104 of a screen display request from the terminal device 101, and the display unit 104 generates the information display screen 503 (step S202). The display control unit 106 notifies the update monitoring unit 107 of a screen display request from the terminal device 101, and the update monitoring unit 107 generates the update monitoring screen 502 (step S203).

  Next, the display control means 106 sends a frame screen 501 including the created update monitoring screen 502 (non-display) and information display screen 503 to the terminal device 101.

  Referring to FIG. 5, the screen displayed on the terminal device 101 includes an update monitoring screen 502 (non-display) for monitoring information update, an information display screen 503 for displaying an actual display screen, an update monitoring screen 502, In addition, the information display screen 503 is composed of a frame screen 501. These are described in, for example, HTML.

  The input terminal device 102 inputs update information for updating the screen displayed on the terminal device 101 and notifies the input unit 108 of the update information. The input unit 108 stores the update information as display information in the storage unit 110 (step S204). Further, the input unit 108 outputs a display update notification to the update notification unit 105 simultaneously with the storage of the display information (step S205). Next, the update notification unit 105 outputs a display update notification to the update monitoring unit 107 through the JMS 109 (step S206). Next, since there is a display update notification (step S207 / Yes), the update monitoring unit 107 notifies the display control unit 106 of an instruction to reload the frame screen 501, and the display control unit 106 issues a screen reload request to the terminal. The process is performed on the apparatus 101 (step S208). The terminal device 101 receives the screen re-reading request from the display control device 106 on the update monitoring screen 502, and the terminal device 101 notifies the display control means 106 of the screen display request in order to redisplay the screen (step 201). .

  If there is no display update notification from the JMS 109 (step S207 / No), the update monitoring means 107 waits for an update notification for a certain period of time (step S209). When time-out waiting has occurred (step S210 / Yes), the update monitoring unit 107 notifies the display control unit 106 of an instruction to reload the frame screen 501, and the display control unit 106 issues a screen reload request to the terminal device 101. (Step S208).

  Next, the second best mode of the present invention will be described in detail with reference to the drawings.

  FIG. 3 is a block diagram showing the configuration of the second best mode of the present invention.

  Referring to FIG. 3, the second best mode of the present invention is an asynchronous update device 400 (for example, a server) that operates by program control, a terminal device 401 (including a WWW browser) that displays a screen, And a terminal device 402 (including a WWW browser) that notifies the update. Further, the asynchronous update device 400 includes a Java virtual machine 403, a display unit 404, an update notification unit 405, a display control unit 406, an update monitoring unit 407, an input unit 408, a servlet context 409 (servlet context) that is shared servlet information, and Storage means 410 (memory, hardware disk, etc.) is included.

  The display unit 404, the update notification unit 405, the display control unit 406, and the update monitoring unit 407 operate on the Java virtual machine 403.

  Information input by the terminal device 102 is stored in the storage unit 410 as display information by the input unit 108. Further, the update notification unit 405 outputs a display screen update request to the update monitoring unit 407 through the ServletContext 409. In response to the notification from the update monitoring unit 407, the display control unit 406 acquires an update image of the display screen displayed on the terminal device 401 from the display unit 404 and updates the screen displayed on the terminal device 401.

  Next, the operation of the second best mode of the present invention will be described with reference to the drawings.

  FIG. 4 is a flowchart showing the operation of the second best mode of the present invention.

  An operation of displaying a screen on the terminal device 401 that performs screen display (right) and an operation of inputting information from the terminal device 402 that updates display information (left) will be described.

  Referring to FIG. 4, the terminal device 401 that displays the screen notifies the display control means 406 of a screen display request in order to display the screen that is the target of asynchronous update (step S601 in FIG. 4). Next, the display control unit 406 notifies the display unit 404 of a screen display request from the terminal device 401, and the display unit 404 generates the information display screen 503 (step S602). Further, the display control unit 406 notifies the update monitoring unit 407 of the screen display request from the terminal device 401, and the update monitoring unit 407 generates the update monitoring screen 502 (step S603).

  Next, the display control unit 406 sends the frame screen 501 including the created update monitoring screen 502 (non-display) and information display screen 503 to the terminal device 401.

  Referring to FIG. 5, the screen displayed on the terminal device 401 includes an update monitoring screen 502 (non-display) for monitoring information update, an information display screen 503 for displaying an actual display screen, an update monitoring screen 502, In addition, the information display screen 503 is composed of a frame screen 501.

  The input terminal device 402 inputs update information for updating the screen displayed on the terminal device 401 and notifies the input unit 408 of the update information. The input unit 408 stores the update information as display information in the storage unit 410 (step S604). In addition, the input unit 408 outputs an update date / time update notification to the update notification unit 405 simultaneously with the display information storage (step S605). Next, the update notification unit 405 updates the update completion date and time of the ServletContext 409 (step S606). Next, since there is an update completion date / time updated in the ServletContext 409 (step S607 / Yes), the update monitoring unit 407 notifies the display control unit 406 of a re-reading instruction of the frame screen 501, and the display control unit 406 A re-reading request is sent to the terminal device 401 (step S608). The terminal device 401 receives the screen reload request from the display control device 406 on the update monitoring screen 502, and the terminal device 401 notifies the display control means 406 of the screen display request in order to redisplay the screen (step 601). .

  If there is no update completion date / time updated in the ServletContext 409 (step S607 / No), the update monitoring unit 407 waits for an update notification for a certain period of time (step S609). When a timeout occurs during the timeout waiting (step S240 / Yes), the update monitoring unit 407 notifies the display control unit 406 of an instruction to reload the frame screen 501, and the display control unit 406 transmits a screen reload request to the terminal device 401. (Step S608).

  Next, the third best mode of the present invention will be described in detail with reference to the drawings.

  The third best mode of the present invention is a method including the steps of FIGS.

  Next, the third best mode of the present invention will be described in detail with reference to the drawings.

  The fourth best mode of the present invention is a program that causes a computer (for example, the asynchronous update device 100 and the asynchronous update device 400) to execute the steps of FIGS.

It is a block diagram which shows the structure of the 1st best form of this invention. It is a flowchart which shows the operation | movement of the 1st best form of this invention. It is a block diagram which shows the structure of the 2nd best form of this invention. It is a flowchart which shows the operation | movement of the 2nd best form of this invention. It is explanatory drawing which shows the structure of a display screen.

Explanation of symbols

DESCRIPTION OF SYMBOLS 100 Asynchronous update apparatus 101 Terminal apparatus 102 Terminal apparatus 103 Java virtual machine 104 Display means 105 Update notification means 106 Display control means 107 Update monitoring means 108 Input means 109 JMS
DESCRIPTION OF SYMBOLS 110 Memory | storage means 400 Asynchronous update apparatus 401 Terminal apparatus 402 Terminal apparatus 403 Java virtual machine 404 Display means 405 Update notification means 406 Display control means 407 Update monitoring means 408 Input means 409 ServletContext
410 storage means 501 frame screen 502 update monitoring screen 503 information display screen

Claims (12)

A first terminal device that notifies a screen display request when a screen reload request is received;
A second terminal device for notifying update information for updating the screen;
Display means;
Storage means for storing display information;
Java virtual machine,
Java messaging service,
An input unit that operates on the Java virtual machine, an update notification unit, an update monitoring unit, and a display control unit,
Receiving the screen display request from the first terminal device, notifying the display means and the update monitoring means, sending an update monitoring screen and a frame screen including an information display screen to the first terminal device; Upon receiving an instruction to reload the frame screen, the display control means for notifying the first terminal device of a screen reload request;
Upon receipt of the screen display request, the display unit generates the information display screen based on the display information in the storage unit, and passes it to the display control unit;
The update monitoring unit that generates the non-displayed update monitoring screen and passes it to the display control unit, and receives a display update notification.
Receiving the update information from the second terminal, storing it as display information in the storage means, and outputting the display update notification to the update notification means;
The update notification means for outputting the display update notification to the update monitoring means through the Java messaging service;
An asynchronous update system for a screen, characterized by comprising: The asynchronous update system for a screen according to claim 1, further comprising: the update monitoring unit that transfers an instruction to re-read the frame screen to the display control unit when a timeout occurs during the timeout waiting. A first terminal device that notifies a screen display request when a screen reload request is received;
A second terminal device for notifying update date and time update information;
Display means;
Storage means for storing display information;
Java virtual machine,
The servlet context,
An input unit that operates on the Java virtual machine, an update notification unit, an update monitoring unit, and a display control unit,
Receiving the screen display request from the first terminal device, notifying the display means and the update monitoring means, sending an update monitoring screen and a frame screen including an information display screen to the first terminal device; Upon receiving an instruction to reload the frame screen, the display control means for notifying the first terminal device of a screen reload request;
Upon receipt of the screen display request, the display unit generates the information display screen based on the display information in the storage unit, and passes it to the display control unit;
The update monitoring unit that generates the non-displayed update monitoring screen and passes it to the display control unit, and receives a display update notification.
Receiving the update date / time update information from the second terminal, storing it as display information in the storage unit, and outputting the display update notification to the update notification unit;
The update notification means for outputting the display update notification to the update monitoring means through the servlet context;
An asynchronous update system for a screen, characterized by comprising: 4. The asynchronous update system for a screen according to claim 3, further comprising: the update monitoring means for passing an instruction for re-reading the frame screen to the display control means when a time-out occurs during the time-out waiting. A first terminal device that notifies a screen display request when a screen reload request is received;
A second terminal device for notifying update information for updating the screen;
Display means;
Storage means for storing display information;
Java virtual machine,
Java messaging service,
Utilizing input means, update notification means, update monitoring means, display control means operating on the Java virtual machine,
The display control means receives the screen display request from the first terminal device, notifies the display means and the update monitoring means, and displays a frame screen including an update monitoring screen and an information display screen on the first terminal. Sending to the device and receiving an instruction to reload the frame screen, notifying the first terminal device of a screen reload request;
When the display means receives a screen display request, the information display screen is generated based on display information in the storage means and passed to the display control means;
The update monitoring unit generates the non-displayed update monitoring screen and passes it to the display control unit, and upon receiving a display update notification, passing the frame screen reload instruction to the display control unit;
The input means receiving the update information from the second terminal, storing it as display information in the storage means, and outputting the display update notification to the update notification means;
The update notification means outputting the display update notification to the update monitoring means through the Java messaging service;
Asynchronous update method of a screen characterized by including. 6. The method for asynchronously updating a screen according to claim 5, further comprising a step of delivering an instruction to re-read the frame screen to the display control means when the update monitoring means times out during a time-out waiting. A first terminal device that notifies a screen display request when a screen reload request is received;
A second terminal device for notifying update date and time update information;
Display means;
Storage means for storing display information;
Java virtual machine,
The servlet context,
Utilizing input means, update notification means, update monitoring means, display control means operating on the Java virtual machine,
The display control means receives the screen display request from the first terminal device, notifies the display means and the update monitoring means, and displays a frame screen including an update monitoring screen and an information display screen on the first terminal. Sending to the device and receiving an instruction to reload the frame screen, notifying the first terminal device of a screen reload request;
When the display means receives a screen display request, the information display screen is generated based on display information in the storage means and passed to the display control means;
The update monitoring unit generates the non-displayed update monitoring screen and passes it to the display control unit, and upon receiving a display update notification, passing the frame screen reload instruction to the display control unit;
The input means receiving the update date and time update information from the second terminal and storing it as display information in the storage means, and outputting the display update notification to the update notification means;
The update notification means outputting the display update notification to the update monitoring means through the servlet context;
Asynchronous update method of a screen characterized by including. 8. The method for asynchronously updating a screen according to claim 7, further comprising: a step of transferring an instruction to re-read the frame screen to the display control unit when the update monitoring unit times out during a timeout waiting. A first terminal device that notifies a screen display request when a screen reload request is received;
A second terminal device for notifying update information for updating the screen;
Display means;
Storage means for storing display information;
Java virtual machine,
Java messaging service,
Utilizing input means, update notification means, update monitoring means, display control means operating on the Java virtual machine,
The display control means receives the screen display request from the first terminal device, notifies the display means and the update monitoring means, and displays a frame screen including an update monitoring screen and an information display screen on the first terminal. Sending to the device and receiving an instruction to reload the frame screen, notifying the first terminal device of a screen reload request;
When the display means receives a screen display request, the information display screen is generated based on display information in the storage means and passed to the display control means;
The update monitoring unit generates the non-displayed update monitoring screen and passes it to the display control unit, and upon receiving a display update notification, passing the frame screen reload instruction to the display control unit;
The input means receiving the update information from the second terminal, storing it as display information in the storage means, and outputting the display update notification to the update notification means;
The update notification means outputting the display update notification to the update monitoring means through the Java messaging service;
Asynchronous screen update program characterized by causing a computer to execute. 10. The program for asynchronous update of a screen according to claim 9, wherein, when the update monitoring unit times out during a timeout waiting, the computer is caused to execute a step of passing an instruction to reload the frame screen to the display control unit. A first terminal device that notifies a screen display request when a screen reload request is received;
A second terminal device for notifying update date and time update information;
Display means;
Storage means for storing display information;
Java virtual machine,
The servlet context,
Utilizing input means, update notification means, update monitoring means, display control means operating on the Java virtual machine,
The display control means receives the screen display request from the first terminal device, notifies the display means and the update monitoring means, and displays a frame screen including an update monitoring screen and an information display screen on the first terminal. Sending to the device and receiving an instruction to reload the frame screen, notifying the first terminal device of a screen reload request;
When the display means receives a screen display request, the information display screen is generated based on display information in the storage means and passed to the display control means;
The update monitoring unit generates the non-displayed update monitoring screen and passes it to the display control unit, and upon receiving a display update notification, passing the frame screen reload instruction to the display control unit;
The input means receiving the update date and time update information from the second terminal and storing it as display information in the storage means, and outputting the display update notification to the update notification means;
The update notification means outputting the display update notification to the update monitoring means through the servlet context;
Asynchronous screen update program characterized by causing a computer to execute. 12. The program for asynchronously updating a screen according to claim 11, wherein when the update monitoring unit times out during a timeout waiting, the computer is caused to execute a step of passing an instruction to reload the frame screen to the display control unit.

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