JP2003330739A - Communication response synchronous system and method, and communication response synchronous program - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To immediately restart a process on standby until response is given after a message is sent to another system when a response is made. <P>SOLUTION: A message transmission means 12 adds a response identifier to a transmission message 24 input from a process and transmits the same to another system 22. A queued process storage means 18 stores a pair of the response identifier and a process identifier corresponding thereto. A message receiving means 14 receives a response message 26 to the transmission message 24 from another system 22 to obtain the response identifier added to the response message. A process control means 16 stops the process when the process having the process identifier outputs the transmission message 24, and the process identifier corresponding to the response identifier obtained by the message receiving means 14 is retrieved by a process storage means on standby 18 to restart the process corresponding to the concerned process identifier. <P>COPYRIGHT: (C)2004,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a communication response synchronization system and the like used for controlling a process of sending a message to another system and waiting for a response.

[0002]

2. Description of the Related Art FIG. 5 is a functional block diagram showing a conventional response communication synchronization system. Hereinafter, description will be given with reference to this drawing.

A conventional response communication synchronization system 80 comprises a message transmitting means 82, a message receiving means 84, a process control means 86, a response reception confirming means 88, a timer 90 and a process storing means 92. There is. The response communication synchronization system 80 is used for controlling the process of sending a message to the other system 94 and waiting for a response, and operates as follows.

When there is a process waiting for a response from sending a message to another system 94, the process control means 86 passes control to the response reception confirmation means 88. The response reception confirmation means 88 confirms whether or not a response to the transmission has arrived by the timer 90 at a constant sampling time. If no response arrives, continue checking at regular sampling times. If a response has arrived, control is returned to the process control means 86 to continue the process.

[0005]

However, this conventional technique has the following problems.

The first problem is that the load on the system is high. The reason is that the process waiting for a response periodically confirms whether or not there is a response.

The second problem is that there is a time lag from the arrival of the response to the restart of the process. The reason for this is that the confirmation of the presence or absence of a response is performed at regular sampling times, so the process for restarting the process is actually performed at the time of the first confirmation after the response arrives. This is because it takes a maximum of one sampling time from to confirmation.

[0008]

SUMMARY OF THE INVENTION Therefore, an object of the present invention relates to a communication response synchronization system or the like which can immediately restart a process waiting for a response after sending a message to another system.

[0009]

A communication response synchronization system according to the present invention, when receiving a transmission message to which a response identifier is added, returns a response message to which the response identifier is added as it is, to a communication device. It communicates via. The communication response synchronization system according to the present invention includes process stopping means for stopping a process having a process identifier when a process outputs the transmission message, and a response identifier added to the transmission message input from the process to transmit to another system. Message transmitting means, a standby process storage means for storing a response identifier and a process identifier corresponding thereto as a pair, and a response identifier added to the response message for receiving a response message to the transmitted message from another system. And a process resuming means for retrieving the process identifier corresponding to the response identifier acquired by the message receiving means in the standby process storage means and resuming the process corresponding to the process identifier. .

When a process outputs a transmission message, the process stopping means stops the process, and the message transmitting means adds a response identifier to the transmission message and transmits it to another system. Then, the standby process storage means stores the response identifier and the process identifier corresponding thereto as a pair. On the other hand, when the other system receives the transmission message, the other system sends back the response message with the response identifier added as it is. This response message is received by the message receiving means, and the response identifier added to the response message is acquired. Then, the process restarting means searches the standby process storage means for a process identifier corresponding to the acquired response identifier, and restarts the process corresponding to the process identifier. Therefore, unlike the prior art, the response message is not processed at regular time intervals, but is processed immediately each time the response message is received. Then, if there is a response, it can be restarted immediately.

Further, a process storage means for storing information about the process and providing the process stop means with information as to whether or not the process outputs a transmission message may be further provided. Furthermore, the communication response synchronization method and the communication response synchronization program according to the present invention are used in the communication response synchronization system according to the present invention.

The Nikkei BP Digital Encyclopedia 2001-
According to the 2002 edition, “process” is defined as follows. A process is a control unit of the OS,
It is a kind of dynamic concept. When you run the program, it creates a process. In other words, a process refers to a running program and is used synonymously with a task. Generally, as many CPUs as the number of processes cannot be prepared. Therefore, when a virtual situation in which CPUs are allocated to each process is created and the CPUs are actually allocated, the processes are switched ( Context switch) Execute.

In other words, the present invention is a system for executing a plurality of processes for communicating with another system, and in the case where there are a plurality of processes for waiting for a response from another system after transmitting a message,
It provides a configuration in which a waiting process can be immediately returned to a running state when a response to a message is received.

[0014]

BEST MODE FOR CARRYING OUT THE INVENTION Next, an embodiment of a communication response synchronization system according to the present invention will be described with reference to the drawings. However, the "process stopping means" and "process restarting means" in the claims are collectively referred to as "process control means".

FIG. 1 is a functional block diagram showing an embodiment of a communication response synchronization system according to the present invention. Hereinafter, description will be given with reference to this drawing.

The communication response synchronization system 10 of this embodiment
Is for communicating via the communication device (not shown) to the other system 22 which returns the response message 26 with the response identifier added as it is when the transmission message 24 with the response identifier is received. The transmission means 12, the message reception means 14, the process control means 16, the standby process storage means 18, the process storage means 20 and the like are provided.

First, the basic function of each means will be described. The message transmission means 12 adds a response identifier to the transmission message 24 input from the process and transmits it to the other system 22. The standby process storage means 18 stores a response identifier and a process identifier corresponding thereto as a pair. The message receiving means 14 sends the transmitted message 2
4 is received from the other system 22, and the response identifier added to the response message 26 is acquired. When the process having the process identifier outputs the transmission message 24, the process control unit 16 stops the process and searches the standby process storage unit 18 for the process identifier corresponding to the response identifier acquired by the message receiving unit 14, Restart the process corresponding to the process identifier. The process storage unit 20 stores information about the process and provides the process control unit 16 with information about whether or not the process outputs the transmission message 24.

A more detailed description will be given. The communication response synchronization system 10 and the other system 22 are the communication response synchronization system 1
0 communicates using the transmission message 24 sent to the other system 22 and the response message 26 returned from the other system 22 to the communication response synchronization system 10.

The communication response synchronization system 10 is composed of a computer that operates under program control. The message transmission means 12 is a process control means 16
From the external system 22 and sends the message to the external system 22 through the communication line. The message receiving means 14 receives a message sent from another external system 22 through a communication line. The process control means 16 controls the execution of a plurality of processes executed in the communication response synchronization system 10. The standby process storage means 18 holds a plurality of process identifiers and response identifiers as a set. The process storage unit 20 stores the execution procedure of the process.

The process executed by the communication response synchronization system 10 is stored in the process storage means 20, and the process control means 16 controls the execution thereof. Further, a plurality of processes are simultaneously executed in the communication response synchronization system 10. Each process has a process identifier corresponding to each other in the communication response synchronization system 10.

When a process transmits to another system 22, the communication response synchronization system 10 suspends the process of the process until a response is sent from the other system 22, and after receiving a response message. continue processing. In this case, the process control means 16 passes the message to be sent to the message sending means 12. The message transmission means 12 generates a response identifier that can uniquely identify the delivered transmission message, adds the response identifier to the transmission message and transmits the response message, and at the same time returns the response identifier to the process control means 16. The process control means 16 pairs the response identifier returned from the message transmission means 12 with the process identifier of the process that tried to transmit the message having the response identifier,
This is registered in the standby process storage means 18, and the execution of the relevant process is temporarily stopped.

The other system 22 returns a response message 26 to the received transmission message 24. At this time, the response identifier added to the transmitted message 24 is added to the response message 26 as it is.

The response message 26 is received by the message receiving means 14 of the communication response synchronization system 10. When the message receiving unit 14 receives the response message 26,
The response identifier added to the response message 26 is passed to the process control means 16. Process control means 16
Searches the waiting process storage means 18 for an item that matches the passed response identifier, derives the corresponding process from the process identifier registered in that item, and resumes execution of that process.

In this manner, it becomes possible to immediately return the appropriate process to the execution state from a plurality of waiting processes.

FIG. 2 is a flow chart showing the operation of the communication response synchronization system 10 during transmission. Hereinafter, description will be given with reference to FIGS. 1 and 2.

First, the process control means 16 acquires the process to be executed next from the process execution procedure stored in the process storage means 20 (step A1). Then, it is determined whether or not the next process to be executed is a process of waiting until a response is received after the message is transmitted (step A2). Here, when the determination is false, that is, when the process to be executed next is not the process of waiting until there is a response after transmission, the necessary process is performed (step A7), and the process returns to step A1.

On the other hand, when the determination is true, that is, when the next process to be executed is the process of waiting until there is a response after transmission, the transmission message is notified to the message transmission means 12. The message transmission means 12 generates a response identifier that is unique within the communication response synchronization system 10 for the notified transmission message (step A).
3). Subsequently, the message sending means 12 sends the send message 24 to the other system 22 using the communication device (step A4), and the response identifier is used as the process control means 16
Notify to.

The process control means 16 registers the response identifier notified by the message transmission means 12 and the process identifier of the process currently being executed in the standby process storage means 18 (step A5). Finally, the process control means 16 suspends the currently executing process (step A6).

FIG. 3 is a flow chart showing the operation of the communication response synchronization system 10 at the time of reception. Hereinafter, description will be given with reference to FIGS. 1 and 3.

When there is a response message 26 to the transmitted message 24, the response message 26 is received by the message receiving means 14 (step B1). The message receiving unit 14 acquires the response identifier from the received response message 26 (step B2) and notifies the process control unit 16 of the response identifier.

Upon receiving the response identifier from the message receiving means 14, the process control means 16 searches the standby process storage means 18 for a registration item having a response identifier that matches the response identifier, and from the registration item, obtains the process identifier. It is acquired (step B3).

If the process identifier cannot be obtained because there is no registration item in the standby process storage means 18 that matches the response identifier, the process is terminated (step B).
4). On the other hand, when the process identifier can be acquired, the registration item is deleted from the standby process storage unit 18 (step B5), and the process of the process having the acquired process identifier is restarted (step B6).

FIG. 4 is a block diagram of the communication response synchronization system 10 which is divided into not the function but the hardware and the software. Hereinafter, description will be given with reference to FIGS. 1 and 4.

The communication response synchronization system 10 includes the communication device 2
8 is connected to another system 22 via
U30, memory (main storage device) 32, auxiliary storage device 3
4. The communication response synchronization system 10 can be composed of several programs (processing routines) 36 and the like. The memory 32 is the process memory image 32.
1, a standby process table 322 and the like. The program 36 includes a process control routine 40, a process processing routine group 41, a transmission processing routine 42, a reception processing routine 43, and the like. Further, the transmission processing routine 42
Includes a response identifier generation routine 421, a standby process registration routine 422, a transmission routine 423, and the like. The reception processing routine 43 is the standby process deletion routine 43.
1, standby process search routine 432, reception routine 4
It consists of 33 etc.

The message transmission means 12 is realized by the CPU 30 and the transmission processing routine 42. The message receiving means 14 is realized by the CPU 30 and the reception processing routine 43. The process control means 16 includes a CPU 30,
Process control routine 40, process processing routine group 4
1 and the process memory image 321 and the like. The standby process storage unit 18 is realized by the standby process table 322. The process storage unit 20 is realized by the auxiliary storage device 34. Further, the standby process table 322 is a set of lines including three items of a line number, a response identifier, and a pointer to the process memory image 321.

First, the process control routine 40 reads the process definition on the auxiliary storage device 34, determines the work to be processed, and calls an appropriate processing routine. At this time, if the work to be processed is “waiting for response after message transmission”, the process control routine 40 calls the transmission processing routine 42.

The transmission processing routine 42 generates a unique response identifier in the communication response synchronization system 10 by the response identifier generation routine 421. The response identifier may be, for example, a combination of a number generated from a counter held in the communication response synchronization system 10 and the time of generation. Then, by the standby process registration routine 422, the response identifier generated by the response identifier generation routine 421 and the process memory image 32 which is an image on the memory 32 of the process currently being executed.
The row in which the pointer to 1 is paired is registered in the standby process table 322. At this time, the line number is automatically generated so as to be unique in the standby process table 322. Subsequently, the transmission routine 423 adds a response identifier to the transmission message, and then the communication device 28 is used to transmit the transmission message 24 to which the response identifier is added to the other system 22. After that, the process stops processing.

After that, when the response message 26 arrives from the other system 22 via the communication device 28, the CPU 3
0 executes the reception processing routine 43. The reception processing routine 43 first extracts the response identifier from the reception message 26 by the reception routine 433 and performs necessary reception processing. Then, the waiting process search routine 432 searches the waiting process table 322 for a row including the response identifier. Then, the pointer to the process memory image 321 included in the row is acquired. continue,
The standby process deletion routine 431 deletes the line including the response identifier from the standby process table 322. After that, the process control routine 40 uses the process memory image 32 acquired by the standby process search routine 432.
The restart of the process corresponding to 1 is instructed.

With the above procedure, the process of waiting for a response after sending a message can be stopped and restarted.

[0040]

According to the communication response synchronization system of the present invention, when a process outputs a transmission message, a response identifier is added to the transmission message and the transmission message is transmitted to another system. Unlike the prior art, the response message is processed at regular intervals by acquiring the added response identifier, searching for the process identifier corresponding to this response identifier, and restarting the process corresponding to this process identifier. Instead, it processes each time a reply message is received, so that a process that sends a message to another system and waits for a reply can be restarted immediately if there is a reply.

In other words, the first effect is that the load of the system required for response waiting processing can be reduced in the process of responding by communication. The reason is that the process of restarting after the process is stopped by waiting for a response is activated by the arrival of a response message, and therefore, the process of periodically confirming the restart while the process is stopped becomes unnecessary. The second effect is that in the process of responding by communication,
It is possible to shorten the time from the arrival of the response to the restart of the process. The reason for this is that the arrival of the response triggers the process to be restarted, so that an extra waiting time is unnecessary.

[Brief description of drawings]

FIG. 1 is a functional block diagram showing an embodiment of a communication response synchronization system according to the present invention.

FIG. 2 is a flowchart showing an operation during transmission in the communication response synchronization system of FIG.

FIG. 3 is a flowchart showing an operation at the time of reception in the communication response synchronization system of FIG.

FIG. 4 is a block diagram of the communication response synchronization system of FIG. 1 divided into hardware and software.

FIG. 5 is a functional block diagram showing a conventional communication response synchronization system.

[Explanation of symbols]

10 Communication Response Synchronization System 12 Message Sending Means 14 Message Receiving Means 16 Process Control Means (Process Stopping Means and Process Resuming Means) 18 Standby Process Storage Means 20 Process Storage Means 22 Other Systems 24 Transmission Messages 26 Response Messages

Claims (6)

[Claims] 1. A communication response synchronization system that communicates via a communication device to another system that returns a response message to which a response identifier is added when it receives a transmission message to which a response identifier is added, the process identifier being a process identifier. Process stop means for stopping a process when a process having a message output a transmission message, message transmission means for adding a response identifier to the transmission message input from the process and transmitting the message to the other system, the response identifier and this Standby process storage means for storing the corresponding process identifier as a pair; message receiving means for receiving a response message to the transmission message from the other system and acquiring the response identifier added to the response message. , With this message receiving means The process identifier corresponding to the obtained the response identifier searched the waiting process storage section, communication response synchronization system and a process resuming means for resuming the process corresponding to the process identifier. 2. The process storage means according to claim 1, further comprising process storage means for storing information about the process and for providing the process stopping means with information as to whether or not the process outputs a transmission message. Communication response synchronization system. 3. A communication response synchronization method for communicating via a communication device to another system that returns a response message to which a response identifier has been added when receiving a transmission message to which a response identifier has been added. When a process having a message outputs a transmission message, a process stopping step of stopping the process, a message transmitting step of adding a response identifier to the transmission message input from the process and transmitting the message to the other system, the response identifier and the A standby process storing step of creating a database by storing the corresponding process identifier in a pair, and a response message to the transmission message received from the other system, and the response identifier added to the response message. Messe to get Di receiving step, to find the process identifier the database corresponding to the response identifier acquired in this message receiving step, the method communication response synchronized with the process resumes step of resuming the process corresponding to the process identifier, the. 4. The communication response synchronization method according to claim 3, further comprising a process storing step of providing information to the process stopping step whether the process outputs a transmission message. 5. A communication response synchronization program for communicating via a communication device to another system that returns a response message with the response identifier added as it is when a transmission message with the response identifier is received, the process identifier being a process identifier. When a process having a message outputs a transmission message, a process stopping step of stopping the process, a message transmitting step of adding a response identifier to the transmission message input from the process and transmitting the message to the other system, the response identifier and the A standby process storing step of creating a database by storing the corresponding process identifier in a pair, and a response message to the transmission message received from the other system, and the response identifier added to the response message. get Communication for causing a computer to execute a message receiving step, a process resuming step of retrieving a process identifier corresponding to the response identifier obtained in this message receiving step in the database, and resuming the process corresponding to the process identifier Response synchronization program. 6. The communication response synchronization program according to claim 5, further comprising a process storing step of providing information to the process stopping step whether the process outputs a transmission message.