JPH0831872B2 - Gateway with communication destination monitoring mechanism - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Outline] Regarding a gateway which converts a protocol of a message and sends it to a communication destination, a transmission failure table is provided and a communication destination which has failed in transmission is registered in advance, and this is stored every predetermined time. For the purpose of quickly retransmitting by referring to and retransmitting to a communication destination that is not in a communicable state, when a protocol-converted message is sent to the communication destination and it fails, the communication destination is registered in the transmission failure table and This message that failed to be sent is stored in the file for storage, and at the same time every time a predetermined time elapses, the message of the communication destination that has failed to send is retrieved from the above file for storage and retransmitted. The message of the same communication destination is retransmitted.

[Industrial applications]

The present invention relates to a gateway with a communication destination monitoring mechanism that converts a protocol of a message and sends the message to a communication destination. With the spread of information processing networks, protocol conversion processing is performed by gateways between networks having different protocols to perform message conversion. In this gateway, it is desired that the message requested to be transmitted when the communication destination is not in the communicable state be transmitted promptly.

[Problems to be Solved by Conventional Techniques and Inventions]

Conventionally, in a gateway 21 for exchanging messages between networks having different protocols as shown in FIG. 3, when a message transmission request is made to a communication destination that is not in a communicable state, the transmission process for the message fails and the accumulation is performed. File 27 is temporarily stored. Then, when the message is successfully transmitted to the same communication destination, or when the message conversion system is restarted, the message that has failed in transmission is taken out from the storage file 27 and retransmitted. Therefore, in a system in which the message is not requested to be sent to the same communication destination, or the message exchange system is not restarted, the process of resending a message that has failed to be sent may occur. was there.

 The operation of the configuration shown in FIG. 1 will be briefly described.

In FIG. 1, the conversion processing unit 24 performs protocol conversion on the message received from the main control unit 23, and the transmission processing unit 25 transmits the message to the communication destination of the message communication destination network 28 after the conversion. Becomes

The message storage unit 26 stores the message whose transmission has failed in the storage file 27.

Performs protocol conversion of the next message of the same communication destination (destination) and transmits the message, and the transmission is successful.

In response to the successful transmission by the main control unit 23, the message retrieved from the storage file 27 is transmitted to the same destination.

According to the present invention, a transmission failure table is provided and the communication destinations that have failed in transmission are registered in advance, and the transmission destinations are referred to and retransmitted at predetermined time intervals, and the retransmission processing is quickly performed for communication destinations that are not in the communicable state. Is intended.

[Means for solving the problem]

 Means for solving the problems will be described with reference to FIG.

In FIG. 1, a transmission failure table 2-1 is a table for registering communication destinations that have failed to transmit a message.

The communication destination monitoring unit 2 refers to the transmission failure table 2-1 every time a predetermined time elapses, extracts the message of the communication destination that has failed in transmission from the storage file 7, and resends it. It retransmits the message.

[Action]

As shown in FIG. 1, the present invention registers a communication destination in the transmission failure table 2-1 when a protocol-converted message is transmitted to the communication destination and fails, and stores this failed transmission message in a file for storage. 7, the communication destination monitoring unit 2 stores this transmission failure table 2-1 every time a predetermined time elapses.
The message of the communication destination whose transmission has failed is retrieved from the storage file 7 and retransmitted, and when succeeding, the remaining messages of the same communication destination are retransmitted.

Therefore, the transmission failure table 2-1 is provided, the communication destinations that have failed in transmission are registered in advance, and the transmission destinations that are not in the communicable state are retransmitted by referring to the transmission destinations every predetermined time and retransmitting them. It can be done quickly.

〔Example〕

Next, the configuration and operation of one embodiment of the present invention will be sequentially described in detail with reference to FIG. 1 and FIG.

In FIG. 1, the gateway 1 converts a message into a message of a different protocol.
7 to 7, and is, for example, a SIA-MHS conversion gateway. This protocol conversion is to convert a message according to SIA (Fujitsu Limited communication protocol) into a message according to MHS (Message Handling System). By this protocol conversion, it becomes possible to transmit a message from the communication source network, for example, the SIA mail network, to the communication destination network, for example, the MHS mail network.

The communication destination monitoring unit 2 is activated each time the processing time measured by the timer 10 has elapsed, and refers to the transmission failure table 2-1 to store the message of the communication destination that has failed in transmission to the storage file 7
When it succeeds in retrieving the message from the device and retransmitting it, the remaining messages of the same communication destination are retransmitted.

The transmission failure table 2-1 is a table for registering communication destinations that have failed to transmit a message.

The main control unit 3 requests the conversion processing unit 4 to convert the received message, or when the transmission fails, registers the communication destination in the transmission failure table 2-1 and stores the message in the storage file 7. Various controls are performed such as issuing a macro, requesting the timer 10 to perform measurement, and activating the communication destination monitoring unit 2 when a notification of the elapse of a predetermined time is received.

The conversion processing unit 4 performs protocol conversion of a message.

The transmission processing unit 5 transmits a message to a communication destination.

The message storage unit 6 stores the message that has failed in transmission in the storage file 7.

The accumulation file 7 is for accumulating messages that have failed to be transmitted.

The communication destination network 8 is a network that transmits a message whose protocol has been converted by the gateway. The communication destination network 8 is, for example, an MHS mail network.

The communication source network 9 is a communication source network that requests the gateway 1 to convert a message protocol. This communication source network 9 is, for example,
It is the SIA mail network.

 Next, the operation of the configuration shown in FIG. 1 will be described.

In FIG. 1, the message A, which has been converted into the protocol and transmitted to the communication destination X of the communication destination network 8, fails to be transmitted.

The message A whose transmission has failed due to: is stored in the storage file 7, and the communication destination X is transmitted to the transmission failure table 2-
Register to 1.

: The communication destination monitoring unit 2 is activated at a predetermined time interval, and reads, for example, the mail ID “A”, which is the first entry of the communication destination X registered in the transmission failure table 2-1.

The message A corresponding to the mail ID “A” read by: is read from the storage file 7 and retransmitted to the communication destination X. When the resend is successful, the next mail ID “B”, mail ID “C”, etc. of the destination X are sequentially fetched, the message is fetched from the storage file 7, and the messages are sequentially retransmitted.
On the other hand, if the resend fails, the process is executed.

As described above, when the transmission of the protocol-converted message fails, it is registered in the transmission failure table 2-1 and the communication destination monitoring unit 2 activated at a predetermined time interval is registered in the transmission failure table 2-1. By re-sending to another communication destination and sequentially retransmitting the message of the same communication destination when succeeded, it becomes possible to quickly perform the retransmission processing to the communication destination that is not in the communicable state.

Next, the operation of the configuration of FIG. 1 will be described in detail with reference to the flowchart of FIG.

In FIG. 2, it is determined whether or not the request is an end request.
If YES, terminate. If NO, then proceed.

Determines whether or not a fixed time has elapsed. In this, the main control unit 3 determines whether or not a macro is issued to the timer 10 and a notification to that effect is given after a certain period of time. If YES, execute. If NO, execute.

Determines whether there is a message transmission request. YE
In the case of S, the protocol conversion of this message is carried out with, the message is sent to the communication destination with, and is executed.
If NO, the subsequent steps are repeated.

Determines whether the transmission was successful. This is the first
The transmission processing unit 5 transmits the message to the communication destination of the communication destination network 8 and determines whether or not the message is successful. If YES, the subsequent steps are repeated. If NO,
Store the message that failed to be sent in step 4 in the storage file 7, and send the communication destination that failed in step to the failed send table 2-1.
Register to and repeat the following.

Determines whether it is registered in the transmission failure table. This determines whether or not the communication destination is registered in the transmission failure table 2-1 in FIG. If YES, the message corresponding to the entry (communication destination) is read from the storage file 7 and transmitted with. On the other hand, in the case of NO, there is no communication destination that failed transmission, so
Do the following.

〔The invention's effect〕

As described above, according to the present invention, a configuration is provided in which the transmission failure table 2-1 is provided, the communication destination that has failed in transmission is registered, and the transmission destination is referred to and retransmitted every predetermined time. Therefore, it is possible to quickly perform the retransmission process for the communication destination that is not in the communication enabled state.

[Brief description of drawings]

FIG. 1 is a block diagram of one embodiment of the present invention, FIG. 2 is a flowchart for explaining the operation of the present invention, and FIG. 3 is an explanatory diagram of the prior art. In the figure, 1 is a gateway, 2 is a communication destination monitoring unit, 2-1 is a transmission failure table, 3 is a main control unit, 4 is a conversion processing unit, 5
Is a transmission processing unit, 7 is a storage file, 8 is a communication destination network, 9 is a communication source network, and 10 is a timer.

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Claims (1)

[Claims] 1. In a gateway for converting a protocol of a message and transmitting it to a communication destination, when the protocol-converted message is transmitted to the communication destination and fails, the communication destination is registered in a transmission failure table (2-1) and this The failed message is accumulated in the accumulation file (7), and the message of the communication destination that has failed in transmission is referred from the accumulation file (7) by referring to the transmission failure table (2-1) every time a predetermined time elapses. A gateway with a communication destination monitoring mechanism, which is configured to retransmit the remaining messages of the same communication destination when it is successfully taken out and retransmitted.