JPH0298745A - Inter-process communication processing system - Google Patents

Abstract

PURPOSE:To describe a processing without being conscious of the computer of a communication opponent by performing communication connection by automatically discriminating whether an inter-process communication request is a local one or a remote one by the attribute of a process identifier proper to each application process. CONSTITUTION:Entities 5-1 and 5-2 which support both inter-local process communication and inter-remote process communication by using the process identifier are provided at computers 1-1 and 1-2, respectively. The entities 5-1 and 5-2 receiving the process identifiers proper to the application processes 3a-3d perform the communication connection by automatically recognizing whether communication is the inter-remote process communication or the inter- local process communication by information to separate its own from another corresponding to the process identifier. In such a way, it is possible to describe the processing without being conscious of the computers 1-1 and 1-2 in which the application processes 3a-3d of the communication opponent exist actually.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to an inter-process communication processing method, and in particular, in a distributed processing system in which a plurality of computers can be connected to each other via a communication line, This invention relates to an inter-process communication processing method for communication processing performed between application processes.

[Conventional technology]

In recent years, computer communication connections have changed from 1:N connections between a host computer and multiple terminal devices to connections between multiple host computers and multiple host computers, and connections between multiple host computers and multiple terminal devices. There is a transition to an N-to-N connection form, such as a connection between a plurality of terminal devices and a plurality of terminal devices.

For this reason, between multiple application processes existing in multiple computers installed in a distributed manner,
The number of distributed processing systems that perform processing while communicating interactively is increasing.

- In JR, there may be a single application process on the computer that performs processing.
- Two or more application processes may exist on a single computer and perform processing while running in parallel; the latter case is called a multi-process environment.

Such a plurality of application processes operate under an operating system that services a multi-process environment, and perform processing while having relationships with each other by performing inter-process communication.

In this case, the application process requests inter-process communication by making a system call to the operating system, and performs communication processing with other application processes via the operating system.

On the other hand, in distributed processing systems that have been increasing in recent years, an application process not only communicates with application processes on its own computer, but also communicates with application processes on other computers connected via communication lines. However, processing is still being carried out.

Note that inter-process communication with application processes on the same computer is referred to as local inter-process communication, and inter-process communication with application processes on different computers is referred to as remote inter-process communication.

FIG. 4 is a block diagram showing an example of a conventional inter-process communication processing method.

The distributed processing system shown in FIG. 4 consists of two computers 41
-1 and 41-2 are connected by a communication line 42, application processes 43a and 43b operate under the operating system 44-1 of the computer 41-1, and application processes 43c and 43d operate under the operating system 44-1 of the computer 41-2. -2
is operating under.

Therefore, when the application process 43a in the computer 41-1 communicates with the application process 43c, the application process 43c
are operating on different computers 41-2, the communication request is sent to the entity 45-1 necessary for communication between the computers by indicating logical or physical address information on the communication line for the communication partner. has been issued.

Therefore, between the application process 43a and the application process 43c, the computer 41-
A remote inter-process communication route 46 is formed from the entity 45-1 in the computer 41-2 through the communication line 42 and the entity 45-2 in the computer 41-2.

On the other hand, when the application process 43a in the computer 41-1 communicates with the application process 43b, it is communication between local processes in the computer 41-1, so the operating system 43a communicates with the application process 43b.
An inter-process communication request is directly issued to the application process 4-1 using the process ID indicating the application process 43b.

As a result, a local inter-process communication route 47 is formed between application process 43a and application process 4.3b.

In this way, in the conventional inter-process communication processing method, local inter-process communication within one's own computer and remote inter-process communication between other computers have different interfaces from the perspective of the application process6. Problems to be Solved by the Invention] The conventional inter-process communication processing method described above requires the description of an application process program.

The description of local inter-process communication within one's own computer is different from the description of remote inter-process communication between other computers, so when creating a program for an application process, it is necessary to Therefore, it is necessary to distinguish and describe the computer and the processing that has coordination.

For this reason, changes in the design of the configuration of distributed processing systems,
Every time there is a change in the allocation of processing after system construction, it becomes necessary to modify the program itself that communicates between application processes, which requires a large amount of man-hours to create and maintain the program for the entire distributed processing system. However, it also has the disadvantage of increasing time loss.

An object of the present invention is to enable a program for each application process to describe communication processing with all application processes existing in a distributed processing system using process identifiers, and to be aware of the computer in which the communication partner application process exists. The purpose of the present invention is to provide an inter-process communication processing method that allows processing to be described without having to do so.

[Means for Solving the Problems] The inter-process communication processing method of the present invention is an inter-process communication processing method for a distributed processing system in which a plurality of computers can be connected to each other via communication lines. As one of the application processes, some of which run on each computer in the processing system, the first application process running on the first computer is one of all the application processes in the distributed processing system. (B) Generates an inter-process communication request requesting jf!i communication processing with another application process using a process identifier that identifies the application process as a key; Corresponding to each of the process identifiers of all application processes in the distributed processing system with which application processes running on a computer communicate, distinguish whether the application process is on the own computer or the application process on another computer. self-other division ff
a first computer which is on the first computer and receives an inter-process communication request from the first application process as one of the entities that stores information and communication connection information to the communication destination indicated by the process identifier. The entity determines whether it is remote inter-process communication with an application process on another computer or local inter-process communication with an application process on its own computer, depending on the self-other classification information corresponding to the received process identifier. (C) In the case of remote inter-process communication, the computer on the second computer that received the communication connection via the communication line The second entity determines that the communication is between an application process on its own computer based on the self-other classification information corresponding to the received process identifier, establishes a communication connection using the communication connection information, and ( D) A second application process on the second computer that has received a communication connection from the second entity executes a communication process with the first application process that has generated the inter-process communication request; E) In the case of local inter-process communication, a third application process on said first computer that receives a communication connection from said first entity is connected to said first application process that generated the inter-process communication request. It consists of executing communication processing with.

〔Example〕

Next, embodiments of the present invention will be described with reference to the drawings.

FIG. 1 is a block diagram showing an embodiment of the inter-process communication processing method of the present invention.

The distributed processing system shown in Fig. 1 consists of two computers 1-
1 and 1-2 are connected to each other by a communication line 2, and application processes 3a and 3b are connected to the computer 1-2.
The application processes 3c and 3d operate under the operating system 4-1 of the computer L-1.
2 operating system 4-2.

First, an application process 3a, which is a first application process, running on computer 1-1, which is a first computer, uses a process identifier Pc, which identifies one of all application processes in this distributed processing system, as a key. A case will be described in which an inter-process communication request requesting communication processing with another application process 3C is generated and passed to the first entity 5-1.

FIG. 2 is a data configuration diagram showing the data configuration stored in the entity 5-1.

As shown in FIG. 2, the entity 5-1 has an application process 3a running on its own computer.
, 3b communicate with all application processes 3a in the distributed processing system.

Process identifiers Pa and Pb of 3b, 3c, and 3d.

Corresponding to each of Pc and Pd, there is self-other classification information in which L indicates an application process on the own computer 1-1 and R indicates an application process on another computer. , L
, R, R, and communication connection information PROCESSOI to the communication destination indicated by process identifiers Pa, Pb, Pc, and Pd,
PROCESSO2.

ADDRESSO2, ^[1ORESSO2 are stored.

In addition, communication connection information PROCESSOI PROCE
SSO2 is an application process 3a.

3b, and one communication connection information ADDR.
ESSO2 is connection information to the computer 1-2.

The entity 5-1 that received the process identifier Pc automatically knows from the self-other classification information R corresponding to the process identifier Pc that it is a remote inter-process communication with an application process on another computer,
Communication connection information AI)I corresponding to process identifier Pc
The IRESSO 2 will establish a communication connection to the computer 1-2 via the communication line 2.

Therefore, on the second computer, computer 1-2, which has received the communication connection via the communication line 2, the second entity, entity 5-2, can receive the process identifier Pc.

FIG. 3 is a data configuration diagram showing the data configuration stored in entity 5-2.

As shown in FIG. 3, the entity 5-2 has an application process 3c running on its own computer.
, 3d communicate with all application processes 3c in the distributed processing system.

3d Process identifiers Pc and Pd of 3a and 3b.

Corresponding to each of Pa and Pb, there is self/other classification information indicating that the application process is on the own computer 1-2 and R is the application process on another computer. , L
, R, R, and communication connection information PROCESSOI to the communication destination indicated by process identifiers Pc, Pd, Pa, and Pb,
PROCESSO2.

A[1DRESSO1, ArolloRESSOI are stored.

In addition, the communication connection information PROCESSOI, PROC
ESSO2 is an application process 3c, respectively.
.

3d, and one communication connection information ADDR.
ESSOI is connection information to the computer 1-1.

The entity 5-2 that has received the process identifier Pc knows that the inter-process communication is with the application process 3C on its own computer 1-2 based on the self-other classification information corresponding to the process identifier Pc, and processes the process. Communication connection information PROCESS corresponding to identifier Pc
Connection to the application process 3C will be made using OI.

As a result, a remote inter-process communication route 6 is formed, and an application process 3C, which is a second application process operating under the operating system 4-2 of the computer 1-2, receives a communication connection from the entity 5-2. is the operating system 4 of the computer 1-1 that generated the inter-process communication request.
Application process 3a running under -1
It is possible to perform communication processing with.

Next, the application process 3a running on the computer 1-1 uses the process identifier pb as a key.
Entity 5 - generates an inter-process communication request requesting communication processing with another application process 3b;
Let us explain the case where it is passed to 1.

The entity 5-1 that has received the process identifier pb automatically establishes a local link with the application process on its own computer based on the self-other classification information corresponding to the process identifier pb.

Knowing that this is inter-process communication, the process identifier pb
A connection is made to the application process 3b using the communication connection information PROCESSO2 corresponding to .

As a result, a local inter-process communication route 7 is formed, and an application process 3b, which is a third application process operating under the operating system 4-1 of the computer 1-1, receives a communication connection from the entity 5-1. is the operating system 4 of the computer 1-1 that generated the inter-process communication request.
Application process 3a running under -1
Communication processing within the computer 1-1 can be executed with the computer 1-1.

As described above, the inter-process communication processing method of this embodiment provides an entity on each computer that supports both local inter-process communication and remote inter-process communication using process identifiers, and each application By automatically determining whether an inter-process communication request is local or remote based on the process identifier attribute unique to the process and establishing a communication connection, the program of each application process can Communication processing with an application process can be described using a process identifier, and processing can be described without being aware of the computer on which the communication partner application process actually exists.

〔Effect of the invention〕

As explained above, the inter-process communication processing method of the present invention provides an entity on each computer that supports both local inter-process communication and remote inter-process communication using process identifiers, and each application process By automatically determining whether an inter-process communication request is local or remote based on the unique process identifier attribute and establishing a communication connection, the program of each application process can This method has the advantage that communication processing with an application process can be described using a process identifier, and processing can be described without being aware of the computer on which the communication partner application process actually exists.

Further, the inter-process communication processing method of the present invention eliminates the need to modify the description of the application process itself even if the location of the application process changes due to a change in the form of processing assignment in a distributed processing system. , it is possible to respond flexibly by changing the attributes of the process identifier registered in each entity, making it possible to simplify the work of creating application programs for distributed processing systems and significantly reduce the number of man-hours required for creation and maintenance. There is an effect.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing an embodiment of the inter-process communication processing method of the present invention, FIG. 2 is a data structure diagram showing the data structure stored in entity 5-1, and FIG. 3 is a data structure diagram showing the data structure stored in entity 5-2. FIG. 4 is a block diagram showing an example of a conventional inter-process communication processing method. 1-1.1-2...Computer, 2...
...Communication line, 3a, 3b, 3c,
3 d --------Application process, 4-
1.4-2...Operating system, 5
-1.5-2... Entity, 6...
・Remote inter-process communication route, 7...Local inter-process communication route, 41-1゜41-2...
... Computer, 42 ... Communication line, 43
a, 43b, 43c, 43d...Application process, 44-1.44-2...Operating system, 45-1.45-2...Entity, 46... ...Remote inter-process communication route, 47...Local inter-process communication route.

Claims (1)

[Scope of Claims] In an inter-process communication processing method for a distributed processing system in which a plurality of computers can be connected to each other via communication lines, (A) several computers are operated on each computer in the distributed processing system; The first application process running on the first computer as one of the application processes that processes (B) generates an inter-process communication request requesting communication processing with an application process; Corresponding to each process identifier of every application process, self-other classification information that distinguishes whether the application process is on the own computer or on another computer, and communication to the communication destination indicated by the process identifier. The first entity, which is located on the first computer as one of the entities that stores connection information, and which receives an inter-process communication request from the first application process, stores self-other information corresponding to the received process identifier. Based on the classification information, it is automatically determined whether the communication is a remote inter-process communication with an application process on another computer or a local inter-process communication with an application process on the own computer, and each communication is (C) in the case of remote interprocess communication, a second entity on a second computer that receives the communication connection via the communication line corresponds to the received process identifier; Based on the self-other classification information, it is determined that the communication is an inter-process communication with an application process on the own computer, and a communication connection is made using the communication connection information; (D) receiving a communication connection from the second entity; (E) in the case of local inter-process communication, the second application process on the second computer executes communication processing with the first application process that has generated the inter-process communication request; A third application process on the first computer that has received a communication connection from the first entity executes a communication process with the first application process that has generated the inter-process communication request. An inter-process communication processing method.