JPH03149628A - Abnormality processing system for inter-program communication - Google Patents

Abstract

PURPOSE:To simultaneously and surely inform the generation of abnormality by deleting a message queue by a message queue control part at the time of generating abnormality to inform the abnormality to a processing request part to be a communication opposite party. CONSTITUTION:Respectively different processing requesting programs are stored in processing requesting parts (1-1) to (1-N) and programs for controlling a resource are stored also in a resource control part 5 to execute communication between these programs. Request data from respective processing request parts (1-1) to (1-N) are stored in the message queue 4 and the resource control part 5 extracts the requesting data from the message queue 4 and executes their processing. When an abnormality detection part 6 detects abnormality, the message queue control part 7 deletes the message queue 4 and simultaneously informs the abnormality to all communication opposite parties. Consequently, the abnormality can be simultaneously and surely informed to all the communication opposite parties.

Description

[Detailed description of the invention] [Table of contents] Overview Industrial field of application Prior art (Figures 4 and 5) Means for solving the problem to be solved by the invention (Figure 1) Working examples (Figures 2 and 3) Effects of the invention [Summary] To make it possible to simultaneously and reliably notify all communication partners of an error using a simple method regarding an error processing method for communication between programs. For the purpose of this, there is provided a processing request section having a processing request program, a message queue, and a resource management section having programs for resource management, etc., and the resource management section has an abnormality detection section and a message processing section for managing the message queue. In an abnormality processing method for inter-program communication in which a queue management section is provided and two programs communicate using a message queue,
When the abnormality detecting section detects an abnormality, the message queue management section deletes the message queue and simultaneously notifies all communication partners of the abnormality.

[Industrial Icheon Field] The present invention relates to an abnormality processing method for communication between programs, and more specifically, it is used when communicating between programs using a message queue, and in particular, it is used to easily and reliably handle abnormalities. This invention relates to a method for handling errors in inter-program communication that can be executed immediately.

[Conventional technology]

FIG. 4 is a block diagram of a conventional inter-program communication system, and FIG. 5 is a processing flowchart of the conventional example shown in FIG.

In FIG. 4, l-l-l-N is a processing requesting unit, 2-1
02-N is a data transmission section, 3 is a memory, 4 is a message kinny, 5 is a resource management section, 6 is an abnormality detection section, and 7 is a message queue management section.

The processing requesting units 1-1 to l-N store different processing requesting programs (application programs), and the resource management unit 5 stores a program for managing resources, such as a network such as a LAN. If so, the network control program is stored.

The message queue 4 is provided in a part of the memory 3 and uses a FIFO method.

An abnormality detection unit 6 provided in the resource management unit 5 detects abnormalities in processing, and a message queue management unit 7
It manages information in the message queue 4.

To request processing from the processing requesting unit 1-1-1-N,
This is performed by sending data to the message queue 4 in the memory 3 from the data transmitting units 2-1 to 2-N provided in the processing requesting unit 1-1-1-N, respectively.

The data requested from each processed cheek unit 1-1-1-N in this way is stored in the message queue 4, and the data in the message queue 4 is sequentially retrieved and sent to the resource management unit 5. Processing is done.

This process will be explained using the flowchart shown in FIG.

It is assumed that the message queue 4 stores processing request data as described above. Since this message queue 4 adopts the FIFO method, data is sequentially extracted from the first stored data and processed by the resource management unit 5 (100).

In this process, the abnormality detection unit (6) monitors abnormalities (101), and if there is no abnormality, it issues a result notification,
The result is notified to the corresponding processing requesting unit via the message queue 4 (103).

However, if it is abnormal, an abnormality notification is performed in the same manner as the result notification described above (102).

That is, if an abnormality occurs in the process of communicating between programs using the message queue 4, the resource management unit 5 that detected the abnormality sends a message to the communication partner φ processing requesting unit 1-1-1-N. In order to notify an abnormality, the abnormality notification was sent as a result notification.

For this reason, the resource management section 5 accurately manages the correspondence between "processing requests" and "processing results."

For example, the resource management section 5 has a management table containing data such as request sources and request contents, and the above-mentioned management is performed using this management table.

[Problem to be solved by the invention]

The above-mentioned conventional devices had the following drawbacks.

(1) Since logic is required to accurately manage the correspondence between "processing requests" and "processing results," processing of programs etc. becomes complicated.

(2) Since it is necessary to notify each processing requesting unit that is a communication partner, the timing at which the partner program receives the abnormality notification and the timing at which the abnormality actually occurs may deviate.

That is, since the abnormality notification is notified to all communication partners in the form of a result notification, the processing takes time and the abnormality notification is delayed.

(3) Due to the reason mentioned in (1) above, the number of man-hours required to develop a program increases, and there is a high possibility that the created program will contain bugs.

The present invention eliminates these conventional drawbacks and simultaneously sends abnormality notifications to all communication partners using a simple method.
The purpose is to ensure that this can be carried out reliably.

(Means for Solving the Problems) Fig. 1 is a diagram showing the principle of the present invention, Fig. A is a principle block diagram of a communication system, and Fig. B is a flowchart of processing.

In Figure A, 1-1-1-N indicates a processing requesting section, 4 indicates a message queue, 5 indicates a resource management section, 6 indicates an abnormality detection section, and 7 indicates a message queue management section.

The processing request units 1-1 to 1-N store different processing request programs (application programs), and the resource management unit 5 also stores programs for resource management, etc. Communication takes place between these programs.

When communicating between programs using Message Kinney 4, requests and result notifications are sent to the message queue 4.
It is done through.

Request data from each processing request section 1-1-1-N is stored in a message queue 4 and sent to a resource management section 5 for processing. When the processing request units 1-1 to 1-N make a request, they enter a waiting state.

Figure B is a flowchart of processing in the resource management section 5.

As described above, the request data from the processing request units 1-1 to 1-N are stored in the message queue 4, so the resource management unit 5 extracts the request data from the message queue 4 and executes the process. (110).

At this time, the abnormality detection unit 6 detects an abnormality (111),
If there is no abnormality, the results will be notified as before (] l
3).

If an abnormality is detected, the abnormality detection unit 6 notifies the message queue management unit 7, and the message queue management unit 7 deletes the message queue 4 (
112).

As a result, the processing requesting units l-l~l that are waiting for the results
- Simultaneously and reliably notify abnormality to N.

[Effect].

The present invention extracts the data requested by the processing requesting section from the message queue and processes the data as described above.

At this time, if there is no abnormality, the result is notified via the message queue, but if an abnormality occurs, the message queue is deleted and the abnormality is notified to the processing requesting unit, which is the communication partner.

Therefore, by simply deleting the message queue, abnormality notification can be simultaneously and reliably performed.

〔Example〕

Embodiments of the present invention will be described below based on the drawings.

2 and 3 are diagrams showing one embodiment of the present invention, in which FIG. 2 is a block diagram of an inter-program communication system, and FIG. 3 is a flowchart of processing.

In FIG. 2, l-l-l-N is a processing requesting unit, 2-1
2-N is a data transmitter, 3 is a memory, 4 is a message queue, 5 is a resource manager, 6 is an abnormality detector, and 7 is a message queue manager.

The processing request section 1-1-1-N stores processing request programs such as different application programs, and the resource management section 5 stores a program for managing resources, such as when a resource is connected to a LAN. If the network is like this, the network control program is stored.

The message queue 4 is provided in a part of the memory 3 and is managed by the message queue management section 7. Further, this message queue 4 employs a FIFO system.

The abnormality detection section 6 detects abnormality in processing within the resource management section 5 and notifies the message queue management section 7 of the abnormality.

Next, the processing will be explained based on the flowchart in FIG.

When requesting processing, processing request data is sent to the message queue 4 from the data transmitting sections 2-1 to 2-N in the processing requesting section 1-1-1-N.

The processing requesting units 1-1 to 1-N that requested the processing are in a state of waiting for a result.

In this state, the resource management unit 5 extracts one piece of request data stored in the message Kinny 4 and executes the process (120).

In this process, the abnormality detection unit 6 monitors the abnormality, and if there is no abnormality, the message queue 4 is processed as before.
Notify the result to the corresponding processing request unit via (122
).

However, if an abnormality occurs, the message queue management unit 7 is notified of the abnormality, so the message management unit 7 that receives this notification deletes the message queue 4 (123) and sends it to the processing requesting unit waiting to receive the result. To simultaneously and reliably notify abnormalities to users.

In this case, when the message queue is deleted, it is
S (Operating System) detects,
The OS issues a notification to the process requesting unit waiting to receive the result. The process requesting unit waiting to receive the result knows from this notification from the OS that the queue has been deleted and an abnormality has occurred.

Furthermore, since the message queue has already been deleted in the processing requesting unit that is scheduled to make the request, it is possible to know that an abnormality has occurred in the other party's program at the time of the request.

That is, the request data is sent from the processing request section to the message queue 4.
If the message queue is deleted,
An abnormality notification is sent to the corresponding processing requesting unit.

After reporting the abnormality as described above, the resource management unit 5
Then, the process waits for recovery from the abnormal state (124), and once the error is recovered, the message queue management section 7 creates the message queue 4 again (125).

At this time, even if a new message queue is created, the processing request section is not notified.

Even without such notification, the processing requesting unit l-1-1-
If N makes a processing request, an abnormality notification will be issued if there is no message queue, and if there is a message queue, the request will be accepted, so it is easy to see that a new message queue has been created.

Therefore, essentially, by re-creating the message queue, notification of recovery from the abnormal state can be made at the same time.

〔Effect of the invention〕

As explained above, the present invention has the following effects.

(1) The processing requesting unit can detect network abnormalities as soon as they occur in all programs, so it can perform post-processing quickly.

Further, the processing requesting unit (program) that is scheduled to request processing also knows that there is an abnormality in the network at the time of the request.

) If the resource management department has a resource management program, such as a network control program, the program:
You need to wait for the network to recover.

In this case, in the conventional method, the structure of the program became complicated because it was necessary to check both the processing request from the communication partner (program) and the network recovery notification.

However, in the present invention, the network control program
Since only network restoration is required, the same functionality can be achieved with a simpler structure compared to conventional methods.

(3) Since network abnormalities and recovery can be performed at once, the structure of resource management units (programs) such as network control programs is further simplified.

[Brief explanation of the drawing]

Fig. 1 is a principle diagram of an abnormality processing method for inter-program communication according to the present invention, Fig. 2 is a block diagram of a program communication system in an embodiment of the present invention, and Fig. 53 is a flowchart of processing in the embodiment, FIG. 4 is a block diagram of a conventional inter-program communication system, and FIG. 5 is a processing flowchart of the conventional example. 1-1 to l-N-processing request unit 4-message queue 5-resource management unit 6-abnormality detection unit 7-message queue management unit

Claims (1)

[Claims] A processing request unit (1-1 to 1-1) having a processing request program;
N), a message queue (4), and a resource management unit (5) having a program for resource management, etc., and the resource management unit (5) includes an abnormality detection unit (6) that detects abnormalities in processing. ) and a message queue management section (7) that manages a message queue, and the above two programs communicate using the message queue (4). If an abnormality is detected in (6), the message queue management unit (7) will
An abnormality handling method for program communication characterized by deleting the error message and simultaneously notifying all communication partners of the abnormality.