JPH06309262A - Decentralized service control system - Google Patents

Abstract

PURPOSE:To provide a client server type decentralized service control system which can eliminate the mistake of an interface by defining clearly the interface. CONSTITUTION:In a client server type decentralized service control system, a client 1 contains an inquiring device 2 which sends the inquiry information including the service, the interface form and the interface meaning to the servers 11 and 13 and makes an inquiry for a service enabling server. Meanwhile the servers 11 and 13 contain the answering devices 12 and 14 respectively. Each of both devices 12 and 14 stores its own service, interface type and interface meaning as the service information, receives the inquiry information from the client 1, and sends the answer information back to the client 1 to show the service enabling state of the server itself when the stored service information is coincident with the received inquiry information.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to service control of a client-server type distributed system in a computer system. In particular, it provides a method for connecting a client and a server.

[0002]

2. Description of the Related Art In a conventional server / client system, a client directly specifies a server to provide a service. Therefore, there were many human mistakes by the client, such as the client specifying the wrong server. Means have been developed to find a server to improve it. This is from the document "Network Com
putting System Reference M
“Anal”. In particular, it is described in detail in pp29-32.

FIG. 18 is a diagram showing a connection method between a server and a client in a conventional server / client system, and FIG. 19 is a diagram showing an interface definition between the server and the client. In FIG. 18, 1 is a client, 2 is an inquiry device provided in the client,
Reference numeral 10 is a server group in which a plurality of servers that provide services are collected, 3 is a server, and 4 is a reply device.

When the server 3 starts, the service of its own server,
The interface information is registered in the response device 4. The inquiring device 2 of the client 1 inquires of the replying device 4 about a serviceable server, and when the replying device 4 has the same service and interface information of the registered server 3, the inquiry device 2 of the client 1 becomes a serviceable server. The client 1 who responds and receives the result requests the server 3 for the service.

FIG. 19 shows an example of definition of an interface that the client 1 inquires by using the inquiry device 2. An example of this is the above-mentioned document "Network Computing"
System Reference Manual "
Quoted from the Network Interface
It is defined in the Definition Language. In this definition example, two input parameters a and b
And one output parameter c each have an interface type that is an extended integer type. Here, only the interface format is defined, and the interface meaning having code system information is implicitly included in the interface format.

[0006]

In the conventional distributed system configuration, the definition of the interface between the server and the client is only in the interface format, and the interface meaning is implicitly included in the interface format. for that reason,
There was a problem that correct results could not be obtained if the server and client have the same interface format but have different interface meanings.

Further, when providing a specific service, it is necessary to prepare a server as another interface if the interface formats are different and if the interface formats are the same but the interface meanings are different. Therefore, when there were many services and many interfaces, it was necessary to prepare many servers.

In addition, as described above, when there are a plurality of servers that execute one service for each interface, and these servers share one resource, exclusive processing is required. For example, if there are two servers, one that uses the interface meaning of the JIS code system and the other server that uses the interface meaning of the ASCII code system to execute the service for writing the information in the file A, two users If they use their respective servers at the same time, the possibility arises that file A is updated at the same time. Exclusive processing is performed in order to avoid this.

The present invention carries out the following matters in order to solve the above problems. The purpose is to clearly define the interface between the server and the client and to obtain a correct connection between the server and the client. Further, by configuring the system so that a server that provides a certain service can receive the service through a different interface, one server that provides a certain service is provided. Furthermore, complex services are also realized by combining simple servers. The purpose of the above is to enable the system to be constructed with a few servers and to avoid the haiku processing when a plurality of servers share one resource.

[0010]

A distributed service control system according to a first aspect of the present invention solves the above problems in a distributed service control system including a client for requesting a specific service and a plurality of servers for providing the service. The following means are available The client includes a service, an interface format for interfacing with the server, and an inquiry device for inquiring a serviceable server by sending inquiry information having an interface meaning that defines the meaning of the interface format to the server. Also, the server stores the service, the interface format, and the interface meaning of the server itself as service information, and if the service information matches the inquiry information sent from the client, the server returns reply information indicating that the service is available. Equipped with a reply device.

The distributed service control system according to the second aspect of the present invention further comprises a conversion server having the means and devices described below. (A) conversion means for converting at least one of interface format and interface meaning of inquiry information from a client, (b) conversion inquiry device for inquiring a serviceable server by sending the converted inquiry information to a server, ( c) A conversion response device that responds to the client with response information indicating that service is possible when there is a serviceable server.

The distributed service control system according to the third and fourth aspects of the present invention further includes a pseudo conversion server having the means, database and device described below. (A) A conversion database that stores convertible interface format or interface meaning information; (b) Pseudo-conversion inquiry device that sends to the server pseudo-conversion inquiry information excluding the interface format or interface meaning from the inquiry information from the client;
(C) An interface format or interface in which the interface format or interface meaning of the server is received as reply information from the server in which the pseudo conversion inquiry information and the service information of the server itself match, and the received reply information can be converted in the conversion database. If stored as a meaning, a pseudo-conversion response device that determines that server as a serviceable server and responds to it,
(D) Conversion server generation means for generating the conversion server that can interface with the serviceable server and the client.

The distributed service control system according to the fifth aspect of the present invention further comprises a composite server having the means and devices described below. (A) A service for inquiring information from a client is divided into a plurality of services, and a creating means for creating inquiry information for inquiring a serviceable server for each of the plurality of services; (b) Sending the created inquiry information to the server. A compound inquiring device for inquiring about a serviceable server, and (c) a compound replying device for replying to the client with reply information indicating that the service is available when there is a serviceable server for each of the plurality of services.

The distributed service control system according to the sixth aspect of the present invention further comprises a pseudo composite server having means, a database and an apparatus described below. (A) A composite service database storing composite information including interface information having a service, an interface format, and an interface meaning of one composite service, and interface information of a plurality of divided services for performing the service, (B) If the service inquired from the client exists as a compound service in the compound service database, a pseudo compound inquiring device that inquires the server as interface information of the divided services in the compound service database, (c) ) If there is a serviceable server for each of the divided services, a pseudo compound reply device that responds to the client with reply information indicating that the service is possible, (d) the serviceable server and the client Composite server generating means for generating a composite server capable to interface.

[0015]

In the distributed service control system according to the first aspect of the present invention, the service transferred by the inquiry device of the client, the inquiry information consisting of the interface type and the interface meaning, the service of the server stored in the server, the interface type and the interface. By comparing the meanings with each other and performing an interface when they match, a correct server-client connection can be obtained.

In the distributed service control system according to the second aspect of the present invention, by having the conversion server having means for converting the interface format or interface meaning of the inquiry information from the client, one server is different via the conversion server. Since the service can be provided by the interface, it is not necessary to prepare a server for each different interface, and the system can be constructed with a small number of servers. Further, conventionally, even when a certain service is provided, a plurality of servers are required for each interface. Then, when those servers share one resource, exclusive processing is required. For example, when a plurality of servers exist for different interfaces in order to provide a service for writing certain information in the file A, there is a possibility that the plurality of servers update the file A at the same time. Exclusive processing was required to avoid this. According to the present invention, even if different interfaces are used to receive a certain service, the conversion server can convert the interface into the interface of the server, so that one server is provided to provide a certain service. It is now possible to eliminate the need for exclusive processing.

In the distributed service control system according to the third and fourth aspects of the present invention, the conversion server can be generated by storing the conversion information of the interface format or the interface meaning in the conversion database.
The operation of the second invention can be effectively performed.

In the distributed service control system according to the fifth aspect of the present invention, a service of inquiry information from a client is divided into a plurality of services, and a complex server for inquiring each of the services is provided, so that a complicated service can be simplified. It can be provided by combining services, there is no need to prepare a server each time, and a system can be constructed with a small number of servers. Conventionally,
When providing a complex service created by combining multiple simple services, it is necessary to prepare a server that provides those simple services and a server that provides the complex services, and further, those servers. Exclusive sharing was required when the two shared one resource. According to the present invention, the composite server can avoid exclusive processing by requesting a service from a server that provides a simple service. For example, conventionally, if there is a server A that provides a service for writing one piece of information in the file A and a server B that provides a complex service including a service for writing one piece of information in the file A, the server A Server B may update file A at the same time. According to the present invention, if the composite server requests the service for writing the information to the server A, it is not necessary to prepare the server B, so that it is not necessary to perform exclusive processing.

In the distributed service control system according to the sixth aspect of the present invention, a composite server is created by storing the composite service, the service, interface format and interface meaning of the plurality of divided services in the composite service database. Therefore, the operation of the fifth invention can be effectively performed.

[0020]

【Example】

Example 1. 1 is a block diagram showing a first embodiment of the invention, FIG.
Is a diagram showing inquiry information, and FIG. 4 is a diagram showing reply information. In FIG. 1, 1 is a client, 2 is an inquiring device provided in the client, 10 is a server group in which a plurality of servers that provide services are collected, 11 and 13 are servers, and 12 and 14 are response devices of the respective servers. . The solid arrow indicates the flow of inquiry information, and the dotted arrow indicates the flow of reply information. In FIG. 2, the first inquiry information 51 will be described. The service column indicates that the service handled is a service that converts kana into kanji. In the interface type column, there are a total of two parameters, one input parameter kana and one output parameter kanji, and these indicate that 4-byte character type data requires the buffer area specified in BUFSIZ. In the interface meaning column, above 2
One of the parameters indicates the EUC code system provided by a certain OS. As an example of other code system, J
There are IS, ASCII, etc. In addition, the reply information in FIG.
In addition to the service, interface format, and interface meaning described in the above inquiry information, it also has a server ID column indicating its own server name. The description format of the inquiry information and the response information is the same description format in the second to eighth embodiments described later.

When the client 1 requests the Kana-Kanji conversion service, a procedure for searching a server providing the service will be described. The inquiry device 2 of the client 1 constructs inquiry information 51 including a service, an interface format, and an interface meaning, and sends it to the server group 10. The response device 12 of the server 11 and the response device 14 of the server 13 receive the inquiry information 51, and compare the service information with the service, the interface format, and the interface meaning of their own. The response device 12 of the server 11 that matches as a result of the comparison transmits the response information 61 including the server ID, service, interface type, and interface meaning of itself to the inquiry device 2 of the client 1. The client 1 having received the reply information 61 requests a service from the server 11 specified by the server ID included in the reply information 61.

The comparison procedure executed by the response device of the server will be described with reference to FIG. Compare the service, interface format, and interface meaning of the inquiry information with the local server information. In step 81, it is determined whether the services match. The case where the service is not specified will be described in the third embodiment and will not be described here. Similarly, step 82
In step 83, interface meanings are compared, and if all the conditions are satisfied, in step 84, reply information is constructed and reply information is transmitted.

As described above, according to the first embodiment, in the distributed system in which the server providing the service and the client requesting the service operate in cooperation with each other, the client inquires the server about the service, the interface format and the interface meaning. The server is provided with a reply device for replying to an inquiry from the client, and the client requests the service to the server having the same interface format and interface meaning as the service.

Example 2. 8 is a block diagram showing a second embodiment of the invention, FIG. 2 is a diagram showing inquiry information, and FIG. 4 is a diagram showing reply information. In the figure, 1 to 14 are the same as in the first embodiment. Reference numeral 21 is a conversion server capable of changing the interface meaning, 22 is a conversion response device included in the conversion server,
Reference numeral 23 is a conversion inquiry device included in the conversion server.
The solid arrow indicates the flow of inquiry information, and the dotted arrow indicates the flow of reply information.

A procedure for searching for a server providing a service when the client 1 requests the Kana-Kanji conversion service will be described. The inquiry device 2 of the client 1 transmits the inquiry information 53 to the server group 10. There is no direct reply server here. The conversion inquiry device 23 of the conversion server 21 does not change the service and interface format of the inquiry information 53, replaces the interface meaning with a convertible interface meaning, forms the inquiry information 51, and sends it again to the server group 10. In this case, the JIS code system is changed to the EUC code system. Since the server 11 that has received the inquiry information 51 can provide the service, it sends the response information 61 to the conversion server 21. The conversion response device 22 of the conversion server 21 which has received the response information 61 sends the response information 6 to the inquiry device 2 of the client 1.
Send 2.

The client 1 which has received the reply information 62
Requests a service to the conversion server 21 based on the reply information 62, the conversion server 21 converts the data and requests the server 11 again. The server 11 transmits the processing result to the conversion server 21, the conversion server 21 performs data conversion of the result, and transmits the result to the client 1.

As described above, in the second embodiment, in the distributed system, a conversion server for converting the interface meaning is added, the conversion server is provided with an inquiry device and a reply device, and the conversion server receives the service request from the client as the interface meaning. It is characterized by converting and re-requesting to the server, converting the result from the server and sending it to the client.

Example 3. 9 is a block diagram showing a third embodiment of the invention, FIG. 10 is a diagram showing contents of a conversion database, FIGS. 11 and 12 are diagrams showing a procedure for generating a conversion server, FIG. 2 is a diagram showing inquiry information, FIG. 4 is a diagram showing reply information. 9 to 14 are the same as in the second embodiment. 24 is a pseudo conversion server for generating a conversion server, 25
Is a pseudo-conversion response device included in the pseudo-conversion server, 26 is a suspicious pseudo-conversion inquiry device included in the pseudo-conversion server, and 27
Is a conversion database having conversion information, and 28 is a conversion server generated by a pseudo conversion server. The solid arrow indicates the flow of inquiry information, and the dotted arrow indicates the flow of reply information. The conversion information of the conversion database in FIG. 10 has an interface meaning before conversion, an interface meaning after conversion, and a function name for performing the conversion.

When the client 1 requests the Kana-Kanji conversion service, a procedure for searching for a server providing the service will be described. The inquiry device 2 of the client 1 transmits the inquiry information 53 to the server group 10 as an inquiry.
There is no direct reply server here. Pseudo conversion server 2
The pseudo-conversion inquiry device 26 of No. 4 has inquiry information 53
Service and interface format are not changed, and the interface information is replaced without specifying the meaning of the inquiry information 52.
Is created and the inquiry is transmitted to the server group 10 again. The server 11 and the server 13 respectively set the interface meanings that can be serviced by the server 11, and the server 13 returns the response information 61 and the response information 63 to the pseudo conversion server 24.
Send to. The pseudo conversion server 24 has inquiry information 53.
After the conversion database 27 is searched from the information of the reply information 61 and the reply information 63, the server 11 to be used is selected, the conversion server 28 that interfaces with the server 11 and the client is generated, and then the conversion server 28 is used as the server ID for the client 1. The pseudo reply device 25 transmits the reply information 64 designated by.

The client 1 which has received the reply information 64
When a service is requested to the generated conversion server 28, the conversion server 28 converts the data and requests the server 11 again. The server 11 transmits the processing result to the conversion server 28, the conversion server 28 performs data conversion of the result, and transmits the result to the client 1.

The comparison procedure executed by the response device of the server will be described with reference to FIG. Compare the service, interface format, and interface meaning of the inquiry information with the local server information. In step 81, it is determined whether the services match. If the service is not specified, execute the following procedure regardless of the service itself. Similarly, the interface formats are compared in step 82 and the interface meanings are compared in step 83. If all the conditions are satisfied, response information is constructed and response information is transmitted in step 84.

According to this procedure, in the inquiry by the inquiry information 52 in FIG. 2, since the interface meaning is not specified, the server having the same service and interface format sends the reply device.

Next, the pseudo conversion server 24 converts the conversion server 28.
The procedure for generating is described with reference to FIGS. 11 and 12. The pseudo conversion server 24 receives response information from a plurality of servers and processes them in order. In step 91, one is taken out from the reply information from a plurality of servers and the following processing is executed. In step 92, since the interface includes a plurality of parameters, the parameters are taken out one by one and the following processing is executed. In step 93, it is determined whether the attribute of the parameter is [in] or [out]. If [in], step 94 is executed. If [out], step 95 is executed. In step 94, it is determined whether the parameter can be converted from the client interface meaning to the server interface meaning. In practice, it is determined whether the interface meaning of the client matches that before conversion in FIG. 10 and the interface meaning of the server matches after conversion in FIG. In step 95, it is determined whether the parameter can be converted from the server interface meaning to the client interface meaning. actually,
It is determined whether the interface meaning of the server matches before conversion in FIG. 10 and the interface meaning of the client matches after conversion in FIG. In step 96, the determination results in steps 94 and 95 are determined, and if conversion is possible, the process proceeds to step 97. If the conversion is not possible, the process proceeds to step 100, and it is determined whether the response information from all the servers can be processed. If the response information remains, the process returns to step 91 to repeat the process. If not, the process ends, and the pseudo conversion server cannot provide the service requested by the client.

On the other hand, in step 97, it is judged whether or not all the parameters have been processed.
Return to and repeat the process. If not, all the parameters of the reply information of the server currently being processed can be converted, and the service can be provided. Therefore, the conversion server 28 is generated in step 98. The conversion server 28 is generated by using the function shown in FIG. 10 necessary for conversion. After that, in step 99, the reply information 64 that the service is available is transmitted to the client.

As described above, in the third embodiment, the pseudo conversion server is added to the distributed system, the pseudo conversion server is provided with the conversion database, the inquiry device and the reply device, and the conversion server is generated from the inquiry information of the client and the reply information of the server. It is characterized by doing.

Example 4. 13 is a block diagram showing a fourth embodiment of the invention, FIGS. 2 and 3 are diagrams showing inquiry information,
4 and 5 are diagrams showing reply information. 1-1 in the figure
2 is the same as in Example 1. Reference numeral 15 is a server for romaji-kana conversion service, 16 is a reply device, 31 is a composite server for providing services in a composite manner, 32 is a composite reply device included in the composite server, and 33 is a composite inquiry device included in the composite server. In addition, the solid arrow indicates contact information,
The dotted arrow indicates the flow of reply information.

A procedure for searching for a server that provides a service when the client 1 requests the Roman-Kanji conversion service will be described. The inquiry device 2 of the client 1 transmits the inquiry information 54 to the server group 10 as an inquiry. There is no server here that can service and reply directly. The composite inquiry device 33 of the composite server 31 transmits the inquiry information 55 and the inquiry information 51 again to the server group 10 in order to execute the service by dividing it into two services, that is, the Romaji-kana conversion and the kana-kanji conversion. Since the server 15 can service the inquiry information 55, the reply information 65 is transmitted, and since the server 11 can service the inquiry information 51, the reply information 61 is transmitted to the composite server 31. Since the compound server which has received the reply information 65 and the reply information 61 can provide the service for converting the Roman characters into the kanji characters, the reply information 66 is transmitted to the client 1 by the composite reply device 32.

The client 1 which has received the reply information 66
Requests the service to the composite server 31, the composite server 3
First, the server 1 first requests the server 15 for the service of converting kana to kana, and uses the result to request the server 11 for the service of converting kana to kanji. The result of the server 11 is sent to the client 1 as the result of the composite server 31.

As described above, in the fourth embodiment, the composite server is added to the distributed system, the composite server is provided with the inquiry device and the response device, the service request from the client is requested to the plurality of servers, and the results are collected. Characterized by sending to the client.

Example 5. In the fourth embodiment, the composite server divides the service from the client into two services,
Although each service request was made, in the fifth embodiment described below, the composite server 3
An example of requesting by dividing into two services will be explained. 14
5 is a block diagram showing a fifth embodiment of the invention, FIGS. 2 and 3 are diagrams showing inquiry information, and FIGS. 4, 5 and 6 are diagrams showing reply information. In the figure, 1 to 16 are the same as in the fourth embodiment. 17 is a server for converting English letters to Roman letters,
Reference numeral 18 is a reply device, 34 is a composite server, 35 is a composite reply device, and 36 is a composite inquiry device. The solid arrow indicates the flow of inquiry information, and the dotted arrow indicates the flow of reply information.
In this embodiment, the conversion of English characters to Kanji is taken as an example, but this answers the need to express a proper name written in English, a personal name, a company name, etc. in Kanji.

In the client 1, the inquiry device 2 sends inquiry information 56 to the server group 10 in order to search for a server that provides an English-Kanji conversion service. There is no server here that can service and reply directly. Compound server 3
Reference numeral 4 again transmits the inquiry information 57, the inquiry information 55, and the inquiry information 51 to the server group 10 in order to execute the service by dividing it into three services, that is, the conversion of English characters into Roman characters, the conversion of Roman characters into Kana, and the conversion of Kana into Kanji. The server 17 can service the inquiry information 57, and therefore the response information 67. The server 15 can service the inquiry information 55, and thus the response information 65.
Since the server 11 can service the inquiry information 51, the reply information 61 is transmitted to the composite server 34. Reply information 67, reply information 65, and reply information 61
The composite server 34 that has received the reply can provide the English-Kanji conversion service.
Send to.

The client 1 which has received the reply information 68
Requests the service to the composite server 34, the composite server 3
4 first requests the server 17 for the conversion of English characters to Roman characters, then uses the result to request the server 15 for the conversion of Roman characters and Kana characters, and finally uses the result to request the server 11 for the conversion of Kana to Kanji characters. To do. Server 11
The composite server 34 receiving the result of (1) transmits the result of the server 11 to the client 1 as the result of the composite server 34.

Example 6. The sixth embodiment described below is an example in which the compound server described in the fourth embodiment requests the service again is a compound server. 15 is a block diagram showing a sixth embodiment of the invention, FIGS. 2 and 3 are diagrams showing inquiry information, and FIGS. 4, 5 and 6 are diagrams showing reply information. In the figure, 1 to 16 and 31 to 33 are the same as in the fourth embodiment. 17 is a server for converting English letters to Roman letters,
Reference numeral 18 is a reply device, 37 is a composite server, 38 is a composite reply device, and 39 is a composite inquiry device. The solid arrow indicates the flow of inquiry information, and the dotted arrow indicates the flow of reply information.

In the client 1, the inquiry device 2 transmits inquiry information 56 to the server group 10 in order to search for a server that provides an English-Kanji conversion service. There is no server here that can service and reply directly. Compound server 3
Reference numeral 7 again sends the inquiry information 57 and the inquiry information 54 to the server group 10 in order to execute the service by dividing it into two services, that is, the conversion of English characters into Roman characters and the conversion of Roman characters into Kanji characters. Since the server 17 can service the inquiry information 57, the reply information 67 is transmitted. Although there is no server that can service the inquiry information 54 and directly responds to the inquiry information 54, the combined server 3 is the same as the fourth embodiment.
1 divides the service into two services, Romaji-Kana conversion and Kana-Kanji conversion, requests the service, and receives the reply information that the service is available, the composite server 31 can provide the Romaji-Kanji conversion service. 66 to the composite server 37. The composite server 37 that has received the reply information 67 and the reply information 66 can provide the English-Kanji conversion service, and therefore sends the reply information 69 to the client 1.

The client 1 which has received the reply information 69
Requests the service to the composite server 37, the composite server 3
The server 7 requests the server 17 for the conversion service of English characters and Roman characters, and uses the result to request the composite server 31 for the conversion service of Roman characters and Kanji characters. The composite server 31 requests the server 15 for the service of converting romanized kana characters, and uses the result to request the server 11 for the service of converting kana to kanji. The result of the server 11 is sent to the compound server 37 as the result of the compound server 31, and it is sent to the client 1 as the result of the compound server 37.

As described above, the server re-requested by the composite server may be the composite server, the servers can be hierarchized, and higher-level composite services can be performed.

Example 7. 16 is a block diagram showing a seventh embodiment of the invention, FIG. 17 is a diagram showing the contents of a composite service database, FIGS. 2 and 3 are diagrams showing inquiry information, and FIGS. 4, 5 and 6 are reply information. It is a figure showing. 1 in the figure
Up to 16 are the same as in the first embodiment. Reference numeral 41 is a pseudo composite server that generates a composite server, 42 is a pseudo composite reply device included in the pseudo composite server, 43 is a pseudo composite inquiry device included in the pseudo composite server, 44 is a composite service database containing composite information, and 45 is a pseudo composite server. Is a composite server created by. The solid arrow indicates the flow of inquiry information, and the dotted arrow indicates the flow of reply information.

A procedure for searching for a server providing a service when the client 1 requests the Roman-Kanji conversion service will be described. Inquiry device 2 of client 1
Transmits the inquiry information 54 to the server group 10. There is no direct reply server here. Then, the pseudo composite inquiry device 43 of the pseudo composite server 41 searches the composite service database 44 and inquires of the server group 10 about the service in the service list. As shown in FIG. 17, in the Romaji-Kanji conversion service, two services, Romaji-Kana conversion and Kana-Kanji conversion, are registered in the service list. Inquiry information 55 and inquiry information 51, respectively.
Is transmitted to the server group 10. Since the server 15 can service the inquiry information 55, the response information 65
Since the server 11 can service the inquiry information 51, the reply information 61 is transmitted to each of the pseudo composite servers 41. Since the pseudo composite server 41 which receives the reply information 65 and the reply information 61 can provide the service for converting the Roman characters to the kanji characters, after generating the composite server 45 in which the plurality of servers 15 and the servers 11 to be used are set, the pseudo composite server 41 is sent to the client 1. The reply information 70 specifying the compound server 45 as the server ID is transmitted by the pseudo compound reply device 42.

Client 1 that received the response information 70
Requests the service to the composite server 45, the composite server 4
First, the server 5 requests the server 15 for the Roman character kana conversion service, and uses the result to request the server 11 for the kana kanji conversion service. The result of the server 11 is sent to the client 1 as the result of the composite server 45.

As described above, in the seventh embodiment, the pseudo composite server is added to the distributed system, and the pseudo composite server is provided with the composite service database, the inquiry device and the reply device, and the inquiry service information of the client and the reply information of the server are used. It is characterized by generating a composite server.

Example 8. In the second embodiment described above, the case where the conversion server converts only the interface meaning of the inquiry information and requests it again is described. In the eighth embodiment, a case where the interface format is also changed will be described. In the eighth embodiment, an example in which the inquiry information 53 inquired by the client 1 in the second embodiment is modified will be described. Here, the configuration diagram shown in FIG. 8 used in the second embodiment, the diagram showing the inquiry information shown in FIG. 2, and the diagram showing the reply information shown in FIG. 4 are used. An example will be described in which the service and interface meaning of the inquiry information 53 inquired by the inquiry device 2 of the client 1 are the same, and the interface format is char [in] kana [BUFSIZ] wchar_t [out] kanji [BUFSIZ]. This inquiry information is referred to as inquiry information 53B. When the client 1 requests the Kana-Kanji conversion service, a procedure for searching for a server providing the service will be described. The inquiry device 2 of the client 1 transmits the inquiry information 53B to the server group 10. There is no direct reply server here. The conversion inquiry device of the conversion server 21 uses the inquiry information 53B.
Service is not changed, the interface format and the interface meaning are replaced with the convertible interface format and the interface meaning, respectively, and the inquiry information 51
Make up. Actually, the interface format is char [in] kana [BUFSIZ] wchar_t [out] kanji [BUFSIZ] to wchar_t [in] kana [BUFSIZ] wchar_t [out] kanji [BUFSIZ], and the interface meaning is from JIS code system to EUC. Replace with the code system. The inquiry information 51 thus configured is transmitted again to the server group 10. Thereafter, the client 1 can receive the Kana-Kanji conversion service in the same manner as in the second embodiment. In the above description of the eighth embodiment, the inquiry information 53B can directly constitute the inquiry information 51 to search for a serviceable server, but the inquiry information 53B can form a plurality of inquiry information. There is. For example, the inquiry information 53 in FIG. 2 is one of them. Exchange server is 1
If one inquiry information is formed and the inquiry information is inquired to the server group and the reply information cannot be received, the next inquiry information is formed as much as possible and the same processing is executed.

Although the interface format and interface meaning of the inquiry information are changed in the eighth embodiment, only the interface format may be changed.

In the above-described first to eighth embodiments, the reply device provided in the server is configured as a device independent of the server, and the server registers the service, the interface format, and the interface meaning in the reply device. Take effect. For example, the response devices included in the server group may be independent of each other, and there may be the same number of response devices as the number of servers, or a plurality of servers may share one response device. Further, the conversion server, the pseudo conversion server, the composite server, and the response device and the inquiry device of the pseudo composite server may be independent.

[0054]

Since the present invention is constructed as described above, the following effects can be obtained.

According to the present invention, since the client searches the server by dividing the interface format and the interface meaning, the interface between the client and the server is clearly defined, and there is no error in the server-client type distributed service control system. can get.

Since the server that provides a certain service can receive the service through different interfaces, one service that provides a certain service can be integrated.

Further, it has become possible to provide complicated services by combining simple services.

As described above, the distributed service control system is composed of a few servers. Further, when a plurality of servers conventionally perform the same service, there is an effect that the exclusive processing which is performed when those servers share one resource is unnecessary.

[Brief description of drawings]

FIG. 1 is a configuration diagram showing a distributed service control device according to a first embodiment of the present invention.

FIG. 2 is a diagram showing inquiry information transmitted by an inquiry device.

FIG. 3 is a diagram showing inquiry information transmitted by an inquiry device.

FIG. 4 is a diagram showing reply information transmitted by a reply device.

FIG. 5 is a diagram showing reply information transmitted by a reply device.

FIG. 6 is a diagram showing reply information transmitted by a reply device.

FIG. 7 is a diagram showing a comparison procedure executed by the reply device.

FIG. 8 is a configuration diagram showing a distributed service control device according to a second embodiment of the present invention.

FIG. 9 is a configuration diagram showing a distributed service control device according to a third embodiment of the present invention.

FIG. 10 is a diagram showing the contents of a conversion database.

FIG. 11 is a diagram showing an operation in which the pseudo conversion server generates a conversion server.

FIG. 12 is a diagram showing an operation in which a pseudo conversion server generates a conversion server.

FIG. 13 is a configuration diagram showing a distributed service control device according to a fourth embodiment of the present invention.

FIG. 14 is a configuration diagram showing a distributed service control device according to a fifth embodiment of the present invention.

FIG. 15 is a configuration diagram showing a distributed service control device according to a sixth embodiment of the present invention.

FIG. 16 is a configuration diagram showing a distributed service control device according to a seventh embodiment of the present invention.

FIG. 17 is a diagram showing the contents of a composite service database.

FIG. 18 is a block diagram showing a conventional distributed service control device.

FIG. 19 is a diagram showing an interface definition of a conventional distributed service control device.

[Explanation of symbols]

1 Client 2 Client Inquiry Device 10 Server Group 3, 11, 13, 15, 17 Server 4, 12, 14, 16, 18 Server Reply Device 21, 28 Conversion Server 22 Conversion Reply Device 23 Conversion Inquiry Device 24 Pseudo Conversion Server 25 Pseudo-conversion response device 26 Pseudo-conversion inquiry device 27 Conversion database 31, 34, 37, 45 Combined server 32, 35, 38 Composite response device 33, 36, 39 Composite inquiry device 41 Pseudo composite server 42 Pseudo composite response device 43 Pseudo composite Inquiry device 44 Composite service database 51, 52, 53, 54, 55, 56, 57 Inquiry information 61, 62, 63, 64, 65, 66, 67, 68, 6
9,70 Reply information 81,82,83,84 Comparison procedure step 91,92,93,94,95,96,97,98,9
9,100 Conversion server generation procedure step

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[Procedure amendment]

[Submission date] July 1, 1993

[Procedure Amendment 1]

[Document name to be amended] Statement

[Correction target item name] 0008

[Correction method] Change

[Correction content]

In addition, as described above, when there are a plurality of servers that execute one service for each interface, and these servers share one resource, exclusive processing is required. For example, if there are two servers, one that uses the interface meaning of the JIS code system and the other server that uses the interface meaning of the ASCII code system to execute the service for writing the information in the file A, two users If they use their respective servers at the same time, the possibility arises that file A is updated at the same time. Exclusive processing is performed to avoid this.

[Procedure Amendment 2]

[Document name to be amended] Statement

[Correction target item name] 0009

[Correction method] Change

[Correction content]

The present invention carries out the following matters in order to solve the above problems. The purpose is to clearly define the interface between the server and the client and to obtain a correct connection between the server and the client. Further, by configuring the system so that a server that provides a certain service can receive the service through a different interface, one server that provides a certain service is provided. Furthermore, complex services are also realized by combining simple servers. And it can be constructed systems with few servers by the above, and an object thereof is to avoid the exclusive process when a plurality of servers share a single resource.

[Procedure 3]

[Document name to be amended] Statement

[Correction target item name] 0018

[Correction method] Change

[Correction content]

In the distributed service control system according to the fifth aspect of the present invention, a service of inquiry information from a client is divided into a plurality of services, and a complex server for inquiring each of the services is provided, so that a complicated service can be simplified. It can be provided by combining services, there is no need to prepare a server each time, and a system can be constructed with a small number of servers. Conventionally,
When providing a complex service created by combining multiple simple services, it is necessary to prepare a server that provides those simple services and a server that provides the complex services, and further, those servers. Exclusive sharing was required when the two shared one resource. According to the present invention, the composite server can avoid exclusive processing by requesting a service from a server that provides a simple service. For example, conventionally, if there is a server A that provides a service for writing one piece of information in the file A and a server B that provides a complex service including a service for writing one piece of information in the file A, the server A Server B may update file A at the same time. According to the present invention, if the composite server requests the service for writing the information to the server A, it is not necessary to prepare the server B, so that it is not necessary to perform exclusive processing.

[Procedure amendment 4]

[Document name to be amended] Statement

[Correction target item name] 0028

[Correction method] Change

[Correction content]

Example 3. 9 is a block diagram showing a third embodiment of the invention, FIG. 10 is a diagram showing contents of a conversion database, FIGS. 11 and 12 are diagrams showing a procedure for generating a conversion server, FIG. 2 is a diagram showing inquiry information, FIG. 4 is a diagram showing reply information. 9 to 14 are the same as in the second embodiment. 24 is a pseudo conversion server for generating a conversion server, 25
Pseudo conversion reply device provided in the pseudo conversion server 26 includes Ru pseudo conversion query device pseudo conversion server, the conversion database having translation information 27, 28 is a conversion server pseudo conversion server has generated. The solid arrow indicates the flow of inquiry information, and the dotted arrow indicates the flow of reply information. Figure 1
The conversion information of the conversion database of 0 has an interface meaning before conversion, an interface meaning after conversion, and a function name for performing the conversion.

[Procedure Amendment 5]

[Document name to be amended] Statement

[Correction target item name] 0046

[Correction method] Change

[Correction content]

[0046] As described above, may server to ask composite server again is a composite server, Ru can composite advanced services than <br/> performed hierarchy of servers.

[Procedure correction 6]

[Document name to be amended] Statement

[Correction target item name] 0051

[Correction method] Change

[Correction content]

Example 8. In the second embodiment described above, the case where the conversion server converts only the interface meaning of the inquiry information and requests it again is described. In the eighth embodiment, a case where the interface format is also changed will be described. In the eighth embodiment, an example in which the inquiry information 53 inquired by the client 1 in the second embodiment is modified will be described. Here, the configuration diagram shown in FIG. 8 used in the second embodiment, the diagram showing the inquiry information shown in FIG. 2, and the diagram showing the reply information shown in FIG. 4 are used. An example will be described in which the service and interface meaning of the inquiry information 53 inquired by the inquiry device 2 of the client 1 are the same, and the interface format is char [in] kana [BUFSIZ] wchar_t [out] kanji [BUFSIZ]. This inquiry information is referred to as inquiry information 53B. When the client 1 requests the Kana-Kanji conversion service, a procedure for searching for a server providing the service will be described. The inquiry device 2 of the client 1 transmits the inquiry information 53B to the server group 10. There is no direct reply server here. The conversion inquiry device of the conversion server 21 uses the inquiry information 53B.
Service is not changed, the interface format and the interface meaning are replaced with the convertible interface format and the interface meaning, respectively, and the inquiry information 51
Make up. Actually, the interface format is char [in] kana [BUFSIZ] wchar_t [out] kanji [BUFSIZ] to wchar_t [in] kana [BUFSIZ] wchar_t [out] kanji [BUFSIZ], and the interface meaning is from JIS code system to EUC. Replace with the code system. The inquiry information 51 thus configured is transmitted again to the server group 10. Thereafter, the client 1 can receive the Kana-Kanji conversion service in the same manner as in the second embodiment. In the above description of the eighth embodiment, the inquiry information 53B can directly constitute the inquiry information 51 to search for a serviceable server, but the inquiry information 53B can form a plurality of inquiry information. There is. For example, the inquiry information 53 in FIG. 2 is one of them. Conversion server is 1
If one inquiry information is formed and the inquiry information is inquired to the server group and the reply information cannot be received, the next inquiry information is formed as much as possible and the same processing is executed.

Claims (6)

[Claims] 1. A client-server type distributed service control system comprising a client requesting a specific service and a plurality of servers providing the service, wherein the client is an interface for interfacing the service with the server. By sending inquiry information having a format and an interface meaning that defines the meaning of the interface format to the server,
An inquiry device for inquiring a serviceable server is provided, and the server stores the service, interface format, and interface meaning of the server itself as service information, and receives and stores the inquiry information from the inquiry device of the client. If the service information matches the inquiry information received,
A distributed service control system comprising a reply device for replying to a client with reply information indicating that service is possible. 2. The distributed service control system further comprises conversion means for converting at least one of the interface format and interface meaning of the inquiry information from the client into another interface format and interface meaning, and the converted means. Conversion provided with a conversion inquiry device for inquiring a serviceable server by sending inquiry information to the server, and a conversion response device for returning serviceable response information to a client when there is a serviceable server The distributed service control system according to claim 1, further comprising a server. 3. The distributed service control system further comprises a conversion database for storing conversion information of interface meaning, and a pseudo conversion inquiry consisting of a service and an interface format excluding the information of interface meaning from the inquiry information from the client. The interface conversion meaning of the server is received as reply information from the pseudo-conversion inquiry device that sends information to the server, and the server in which the pseudo-conversion inquiry information matches the server's own service and interface format, and the received interface meaning and the client's interface meaning If the interface meaning of the inquiry information is stored in the conversion database as a convertible interface meaning, a pseudo-conversion response device that determines and responds to that server as a serviceable server; Using the conversion information stored in the conversion database,
The distributed service control system according to claim 1, further comprising a pseudo conversion server having conversion server generating means for generating the conversion server according to claim 2, which can interface with the serviceable server and the client. . 4. The distributed service control system further comprises a conversion database for storing conversion information in an interface format, and a pseudo conversion inquiry having a service and an interface meaning excluding information in the interface format from inquiry information from the client. The interface format of the server is received as reply information from the pseudo-conversion inquiry device that sends information to the server, and the server whose pseudo-conversion inquiry information matches the server's own service and interface meaning. If the interface format of the inquiry information is stored as a convertible interface format in the conversion database, a pseudo conversion response device that determines and responds to that server as a serviceable server, Using the conversion information stored in the conversion database,
The distributed service control system according to claim 1, further comprising a pseudo conversion server having conversion server generating means for generating the conversion server according to claim 2, which can interface with the serviceable server and the client. . 5. The distributed service control system further comprises a creating unit that divides the service of the inquiry information from the client into a plurality of services and creates inquiry information for inquiring a serviceable server for each of the plurality of services. , A compound inquiring device that inquires a serviceable server by sending the created inquiry information to the server, and, if there is a server that can service each of the plurality of services, reply information indicating that service is possible to the client 2. The distributed service control system according to claim 1, further comprising a composite server including a composite reply device for replying to. 6. The distributed service control system further comprises: interface information having a composite service and interface format and interface meaning of one service, and a plurality of divided service services and interfaces for performing the service. A composite service database that stores composite information having a format and interface information having an interface meaning, and if the service inquired by the client exists as a composite service in the composite service database, the composite service database is divided. If there is a pseudo compound inquiring device that inquires the above server with the interface information of the service as inquiry information and a server that can service each of the divided services, the service is available. A pseudo compound reply device for replying to the client with reply information indicating that it is capable, and a compound server generation means for generating a compound server according to claim 5 capable of interfacing with the serviceable server and the client. The distributed service control system according to claim 1, further comprising a composite server.