JPH10228435A - Gateway device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a means capable of continuing operation processing interrupted on the way of processing only by executing long on operation again at the time of restoring abnormality of the terminal. SOLUTION: Since the gateway device is provided with a logon detection means for detecting logon information inputted from a primary side terminal, a terminal abnormality detection means for detecting the abnormality of the terminal, a line holding means for holding a connection line connected to a secondary host computer at the time of abnormality of the terminal, and a down telegram processing means for registering and retrieving a down telegram from the secondary side to the primary side in/from a down telegram storage part, processing is continued from the processing part interrupted by the abnormality of the terminal when the terminal abnormality is restored, and at the time of terminal abnormality, processing can be continued from the interrupted processing part by enabling a user to access from another terminal.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a line control and processing continuation method by a gateway when a terminal is abnormal when the terminal is connected to a host computer via a gateway.

[0002]

2. Description of the Related Art FIG. 5 shows a gateway (computer).
FIG. 1 is a system conceptual diagram showing the entire system centering on a terminal 50. A terminal 50 is connected to a primary station side of a gateway 52 via a communication line 51 such as a LAN (Local Area Network)
Further, the secondary station side of the gateway is a system connected to a host computer 54 via a communication line 53.

[0003] Therefore, the gateway which is the center of the present invention is an apparatus having a basic function of relaying the exchange of messages between the terminal and the host computer. Hereinafter, the transmission direction from the terminal to the host computer is "up". The opposite is referred to as “down”.

In such a system, when an abnormality occurs on the terminal side, conventionally, not only communication between the terminal and the gateway but also communication between the gateway and the host computer is cut off at the same time, and a long business process is performed. In such a case, I was worried about starting over from the beginning.

[0005]

As described above, in the prior art,
Due to some kind of terminal error, the business process that has been performed until now is interrupted due to the line disconnection, and when the terminal error is recovered, the user must log on again for the line connection and then start the previously interrupted business process first. From the start.

SUMMARY OF THE INVENTION In view of the foregoing, it is an object of the present invention to provide means for continuing a business process interrupted in the middle of a process only by re-logon at the time of terminal error recovery.

[0007]

The above object is achieved by a gateway device constructed as described below. FIG. 1 is a configuration diagram of the present invention. That is, in the gateway device, logon detection means for detecting logon information input from the primary terminal, terminal abnormality detection means for detecting an abnormality of the terminal, and connection to the secondary host computer when the terminal is abnormal. The line is held by including a line holding unit that holds the connected connection line, and a downstream message processing unit that registers and searches the downstream message from the secondary side to the primary side in the downstream message storage unit. When the terminal abnormality is recovered in the state, the processing can be continued from the continuation of the processing interrupted due to the terminal abnormality.

In the case where the line holding time is set for each user of the terminal, when the terminal is abnormal, the user may access from another terminal and continue the process from the continuation of the interrupted process. It becomes possible.

[0009]

FIG. 2 is an explanatory diagram of a system according to an embodiment. In the gateway device shown in FIG. 2, the primary station control is a program for controlling communication with a terminal.
The next station control is a program for controlling communication with the host computer.

[0010] A program for relaying communication between the terminal and the host computer is a relay process. In particular, the relay processing program receives a downlink message (a transmission message from the host computer to the terminal) and transmits the received message. When the registered message is registered and stored in the downlink message storage unit, or when an abnormal terminal recovery described later is detected and the retained message is retrieved from the downlink message storage unit, the relay processing program executes the downlink message processing (program ) Is called to request registration / search processing.

Next, the operation of the thus configured gateway device will be described below, but the description of the general operation of the gateway device for relaying communication will be omitted here.

First, at the start of work in normal times, a user performs a logon operation from a terminal. At this time, the user receives a user ID for identifying the user.
And password are entered, and the terminal number automatically acquired at the same time
Together with the relay processing program.

In the relay processing program recognizing the logon, the line connection operation (session establishment operation) with the host is performed.
At the same time, the downlink message processing program is requested to secure an area for storing the downlink message in the downlink message storage unit and to set key information necessary for registration / search. The key information indicates a user ID or a terminal number managed by the relay processing program, and is given from the relay processing program when making a request. FIG. 3 shows a management table of the key information, and a line holding time, which will be described later, is collectively managed by the table.

Conversely, at the end of the work, the relay processing program recognizes the logoff operation from the user, performs the operation of releasing the line (opening the session), and simultaneously stores the downlink message secured at the start. Area is opened by the downstream message processing program.

Next, when the normal business process is started following the logon operation, the message exchanged between the terminal and the host computer is relayed by the relay processing program. With respect to the telegram, the downstream telegram processing program is designed to register and store the downstream telegram in the downstream telegram storage unit in response to a request (with key information) from the relay processing program.

As described above, in normal times, the user's purpose is achieved by the logon operation from the user, the normal business process, and the final logoff operation. Next, a description will be given of a case where an abnormality occurs in the terminal used during the processing.

First, when an abnormality of the terminal is detected by the relay processing program, the program refers to the line holding time between the host computers set and stored in advance for each terminal or each user (see FIG. 3). Timed by a timer,
Meanwhile, the line connection is maintained.

In the meantime, the terminal abnormality is repaired (recovered)
In this case, the user performs a log-on operation again from the terminal, or if there is another normal terminal when the terminal is abnormal, the user performs a log-on operation from another terminal. The processing for continuing the processing is performed by the procedure shown in FIG.

That is, in step 40, the relay processing program recognizes logon and key information, and
Then, it is checked whether the user ID or the terminal No exists in the active key information management table. If neither exists, a normal log-on process is performed in step 47.

If it exists in the management table, in step 42, based on the key information, a request is made to the down message processing program to retrieve the stored message. The requested downstream telegram processing program searches for the telegram stored in the downstream telegram storage unit, and notifies the relay processing program of the search result in step 44.

At step 45, the result of the search is judged, and if there is a staying downstream message, step 4
In step 6, the downstream message is transmitted to the terminal, and if the terminal message does not exist, the process after the process is interrupted due to the terminal error is continued.

[0022]

As is apparent from the above description, according to the present invention, when a terminal error occurs, a down-line message is registered and stored while holding the connection line connected to the secondary host computer. However, when recovering from a terminal error, business operations can be continued from the continuation of the interrupted process only by re-logon operation, and if the line holding time is set for each terminal user, Immediately, the user can access from another terminal and perform the same processing as described above, and there is an industrial effect that operability and work efficiency can be improved.

[Brief description of the drawings]

FIG. 1 is a block diagram of the present invention.

FIG. 2 is a diagram illustrating a system according to an embodiment of the present invention.

FIG. 3 shows an example of a key information management table according to the present invention.

FIG. 4 is a processing flow at the time of terminal abnormality recovery according to the present invention;

FIG. 5 is a conceptual diagram of a conventional system.

[Explanation of symbols]

 50 Terminal 51 Line such as LAN 52 Gateway 53 Line 54 Host computer

Claims (6)

[Claims] In a gateway device, logon detecting means for detecting logon information input from a primary terminal, terminal abnormality detecting means for detecting an abnormality of the terminal, and a secondary host when the terminal is abnormal A line holding unit that holds a connection line connected to a computer; and a downlink message processing unit that registers and searches a downlink message from the secondary side to the primary side in a downlink message storage unit. Gateway device to do. 2. The gateway device according to claim 1, wherein said line holding means holds the line based on information given in advance as a line holding time from outside and registered in a storage device. 3. The gateway device according to claim 1, wherein the line holding time is set for each terminal. 4. The gateway device according to claim 1, wherein the line holding time is set for each user of the terminal. 5. The gateway device according to claim 4, wherein the user accesses from another terminal when the terminal is abnormal. 6. In a gateway device, a log-on detection function for detecting log-on information input to the device from a primary terminal, a terminal error detection function for detecting an abnormality of the terminal, To realize a line holding function of holding a connection line connected to the secondary host computer, and a downlink message processing function of registering and searching for a downlink message from the secondary side to the primary side in a downlink message storage unit. Recording medium on which the computer program is recorded.