KR19980045891A - Communication device and method for communication by transmitting and receiving relay in distributed object system - Google Patents

Abstract

The present invention divides the node area and the network area and installs a transmitting relay and a receiving relay that keep the network area and the node always connected, and transfers data between the client and the server through them, thereby minimizing the load consumed during connection and disconnection. The present invention relates to a communication device and a communication method by a transmitting and receiving relay in a distributed object system.

Description

Communication device and method for communication by transmitting and receiving relay in distributed object system

The present invention relates to a communication apparatus and a communication method by a transmission and reception relay in a distributed object system, and more particularly, to a transmission relay and a reception relay that maintains a network filtering node always connected by dividing into a node area and a network area. The present invention relates to a communication apparatus and a communication method by a transmission and reception relay in a distributed object system that can minimize the load consumed when connecting and disconnecting by installing and transferring data between a client and a server through them.

The present invention belongs to the field of distributed processing technology, object technology, client / server technology, and communication technology.

In the prior art, a client and a server related to data transfer connect data directly in a Remote Procedure Call (RPC) form through a communication network. This method connects and disconnects as many times as the application calls when one client calls another server on the same node. In the distributed processing system, the client and server operating environment transmits a small amount of data while performing frequent connection and disconnection processes, thus spending more time connecting and disconnecting than time required for data transmission.

In the prior art, a frequent connection and disconnection process is performed without data division between a client and a server, but the present invention divides a network node and a node into a network relay node and a network relay node. It provides a communication apparatus and a communication method by a transmitting and receiving relay in a distributed object system that minimizes the load consumed when connecting and disconnecting by installing a receiving relay and transferring data between a client and a server through the receiving relay. There is a purpose.

In order to achieve the above object, the present invention provides a client, a server, a transmission relay, and a reception relay processor that each node performing a data transfer operation through a system bus, a communication processing board, and a communication network in a distributed object system provided with transmission and reception relays. It is characterized in that each configured separately.

In addition, in order to request the application service object of the server to perform the service in the application object of the client to call the request control object and deliver the request data and waiting for the result, and the request data by calling the dispatch object in the request control object Forwarding, calling a recipient object and waiting for the result data; transmitting request data from the sending object of the client to the sending relay; and the sending relay calling the receiving object from the transmission control object and waiting for receipt. Receiving and passing the data to the transmission control object, calling the transmission object from the transmission control object to transmit the data to the communication network, and again calling the reception object to enter the reception standby state, and the receiving relay receives the reception control object. Call the receiving object on Receiving and passing the data to the reception control object, calling the dispatch object from the reception control object to send the data to the server, and calling the reception object again to enter the reception state, and the server receiving the server control object. Invoking the object to wait for receipt and returning to the server control object when the data is delivered, branching the thread to process the request data from the server control object to call an application service object, and the other thread receives the receiving object. Calling and waiting for the request data, performing the service requested by the client in the application service object, and returning to the server control object, calling the dispatch object in the server control object, and transmitting the result data to the sending relay server. Return to the control object and terminate the thread. It is characterized by being built.

In addition, it is characterized in that the distributed object system area is divided into a node area and a network area to transmit data.

1 is a structure in which a transmitting relay and a receiving relay are installed in a node, and a process of processing the transmitting relay and the receiving relay by software without changing the hardware structure is shown.

2 is a flowchart illustrating a procedure for transferring data between a transmitting relay and a receiving relay between a client and a server.

FIG. 3 is a flow chart showing a data transfer path when a node operating a client and a node operating a server are different from each other in a state divided into a node area and a network area.

4 is a diagram illustrating a state in which a distributed relay system connects a communication network with a transmitting relay and a receiving relay through a network area in a real operating environment in which a distributed object system includes a plurality of nodes and a plurality of clients and servers exist.

* Description of the symbols for the main parts of the drawings *

101: client 102: server

103: transmitting relay 104: receiving relay

105: communication network 106: system bus

107: communication processing board

Hereinafter, with reference to the accompanying drawings will be described an embodiment of the present invention;

1) Node Structure

Each node of the distributed object system provided with the transmitting and receiving relays is composed of a client 101, a server 102, a transmitting relay 103, and a receiving relay 104 processor. Each processor in the node performs data transfer through the system bus 106, the communication buffer in the communication processing board 107, and the communication network 105.

Each processor of the node is composed of several objects as shown in FIG.

The client 101 is composed of an application object 11, a request control object 12, a dispatch object 13 and a recipient object 14. The server 102 is composed of an application service object 21, a server control object 22, a dispatch object 23, and a recipient object 24. The transmission relay 103 is composed of a transmission control object 31, a transmission object 32, a receiving object 33, the receiving relay 104 is a reception control object 41, the sending object 42 and the receiving object ( 43).

2) data flow

As shown in FIG. 2, the data flow between the client 101 and the server 102 is requested by the application object 11 of the client 101 to request the application service object 21 of the server 102 to perform service. Call control object 12 to pass the request data and wait for the result. The request control object 12 calls the dispatch object 13 (confirms the position of the server from the name manager shown in FIG. 3), delivers the request data, and invokes the receiving object 14 to wait for the result data. The dispatch object 13 of the client 101 delivers the request data to the transmitting relay 103.

The transmission relay 103 calls the reception object 33 to the transmission control object 31 in the reception waiting state, receives the data, and passes the data to the transmission control object 31. The transmission control object 31 calls the transmission object 32 to transmit data to the communication network 105, and calls the reception object 33 again to be in a reception waiting state.

The reception relay 104 calls the reception object 43 in the reception control object 41 and waits for a reception state. When the reception relay object 104 receives the data, the reception relay object 41 passes the reception control object 41 to the reception control object 41. The reception control object 41 calls the dispatch object 42 to send the data to the server 102 and again calls the reception object 43 to be in a waiting state.

The server 102 calls the recipient object 24 from the server control object 22 to be in a waiting state for reception and returns to the server control object 22 when the data is delivered. The server control object 22 calls the application service object 21 by branching the thread to process the request data, and the other thread calls the receiving object 24 to wait for another request data. The application service object 21 performs the service requested by the client 101 and returns to the server control object 22, which in turn calls the dispatch object 23 to send the result data to the relay 103. To the server control object 22 to terminate the thread.

The transmitting relay 103 transmits the result data to the communication network 105 in the same manner as the request data is transmitted to the communication network 105. The receiving relay 104 receives the result data from the communication network 105 and transmits the result data to the client 101 in the same manner as the method of receiving and transmitting the request data of the communication network 105 to the server 102.

The receiving object 14 of the client 101 waiting for an application service execution result receives the result data and passes it to the request control object 12, and the request control object 12 passes the result data to the application object 11.

3) How to operate

A) Start and stop

When each node of the distributed object system in which the transmitting relay and the receiving relay are installed operates, the distributed object system monitor starts the transmission relay, the receiving relay, the name manager, and the server processor as shown in FIG. The server registers the processable service with the name manager, and the name manager propagates the service name to each node of the distributed object system through the sending and receiving relays. When each processor in the distributed object system completes its initialization, it is waiting for data.

The stopping of the distributed object system in which the transmitting relay and the receiving relay are installed is performed by generating an end signal in the system monitor. The end signal is sent to the name manager, the server, the receiving relay, and the transmitting relay in turn, and each processor completes the processing in progress and terminates in sequence when it goes to standby.

B) data transfer in the node area;

As shown in node A of FIG. 3, when a user queries a client (1), the client creates a request data and delivers it to a local server (2). The server receives the request data, performs the service, and delivers the processed result data to the client (3). The client analyzes the resulting data and responds to the user's query (4).

C) data transmission in the network area;

As shown in node A of FIG. 3, when a user inquires of a client (1), the client makes a request data and transmits it to a transmission relay in a network area (5). The transmitting relay transmits the request data to the B node through the communication network (6).

The receiving relay of node B receives the request data from the communication network and forwards it to the server in the node area (7). The server receives the request data, performs the service, and transmits the processed result data to the transmission relay in the network area (8). The transmission relay transmits the result data to the node A through the communication network (9).

The receiving relay of node A receives the result data from the communication network and delivers the result data to the client of the node area (10). The client analyzes the resulting data and responds to the user's query (4).

D) system operation;

In the distributed object system operating environment in which the transmitting and receiving relays are installed in the network area, a plurality of clients and a plurality of servers operate at each node of the node area as shown in FIG. 4, and transmit the request data and the result data to the communication network of the network area. Receive relays that transmit the data received from the transmitting relay and the communication network to the client or server in the node area operate independently and deliver the request data and the result data of the distributed object system at high speed.

This data transfer method maintains the data flow in a constant direction in distributed object system and makes the data transfer process the same to easily manage the network and greatly improve the processing speed in the network.

As described above, according to the present invention, the distributed object system is divided into a node area and a network area, and thus a communication method by a transmitting relay and a receiving relay is used. Thus, since the minimum network resources are used, the collision occurrence frequency in the communication network is reduced. In addition, the communication network can be easily managed while the communication network is expected to improve the processing speed, and it is easy to implement a distributed object system by separating the transmission relay and the reception relay.

In addition, since the data is transmitted between the transmitting relay and the receiving relay which are already connected between the client and the server, the connection and release processing procedure is eliminated. Processors that have no data to transmit are waiting at no load and maintain a constant data transfer direction, making it easy to apply encryption algorithms to specific objects, and a new communication method that can be easily applied to asynchronous data transfer.

Claims (11)

Distributed object, characterized in that each node that performs data transmission work through system bus, communication board and communication network is composed of client, server, sending relay and receiving relay handler separately in distributed object system equipped with transmitting and receiving relay. Communication device by a transmitting and receiving relay in a system. The method of claim 1, And said client comprises an application object, a request control object, a dispatch object and a recipient object. The method of claim 1, And said server comprises an application service object, a server control object, a dispatch object and a recipient object. The method of claim 1, And said transmitting relay comprises a transmission control object, a transmission object and a receiving object. The method of claim 1, And the receiving relay is composed of a reception control object, a dispatch object, and a reception object. Invoking a request control object to request service performance from an application object of a client to perform a service from a server, and passing the request data and waiting for the result; Calling the dispatch object in the request control object to deliver the request data, and calling the recipient object to wait for the result data; Delivering the request data from the sending object of the client to a transmitting relay agent; The sending relay calls the receiving object from the transmitting control object and waits for the receiving object, receives the data and passes it to the transmitting control object; Calling the transmission object from the transmission control object to transmit data to the communication network, and calling the reception object again to enter a reception standby state; The receiving relayer calls the receiving object in the receiving control object and waits for receiving the data, receives the data and passes it to the receiving control object; Sending data to a server by calling a dispatch object in the reception control object and entering a reception state by calling a reception object again; The server is in a waiting state for receiving a call to the receiving object from the server control object and returns to the server control object when data is delivered; Branching a thread to process request data from the server control object to call an application service object, and the other thread calls a receiving object to wait for another request data; Performing a service requested by a client in the application service object and returning to a server control object; And transmitting the result data to the transmitting relay by calling the dispatch object in the server control object, and ending the thread by returning to the server controlling object. The method of claim 6, And a transmission and reception relay in a distributed object system, characterized in that the transmission relay transmits the result data to the communication network in the same manner as the transmission of the request data to the communication network. The method of claim 6, The receiving relay is a communication method by a transmitting and receiving relay in a distributed object system, characterized in that for receiving the result data in the communication network and transmitting to the client in the same manner as the method for receiving and transmitting the request data of the communication network to the server. A method of communication by a transmitting and receiving relay in a distributed object system, characterized in that the distributed object system area is divided into a node area and a network area to transmit data. The method of claim 9, The method of transmitting data in the node area may include a step in which a client makes a request data to a local server when a user inquires of a client. The server receives the request data to perform a service and delivers the processed result data to the client, And the client analyzing the result data and responding to a user's query. The method of claim 9, The data transmission method of the network area includes the steps of the client making a request data when the node A user inquires of the client, and transmits the requested data to the transmission relay of the network area; Transmitting, by the transmitting relay, the request data to the B node through a communication network; Receiving, by the receiving relay of the B node, the request data from the communication network and delivering the requested data to the server in the node area; Receiving the request data by the server to perform a service, and delivering the processed result data to a transmission relay in a network area; Transmitting, by the transmitting relay, the result data to the node A through a communication network; Receiving, by the receiving relay of the node A, the result data from the communication network and delivering the result data to the client in the node area; And the client analyzing the result data and responding to a user's query.