CN108111578A - The method of distribution terminal data acquisition platform access terminal equipment based on NIO - Google Patents

Abstract

The invention discloses a kind of methods of the distribution terminal data acquisition platform access terminal equipment based on NIO, it overcomes in traditional " multi-threading correspondence ", each client link corresponds to a sub-line journey, and the shortcomings that sub-line journey needs to maintain and establishes data interaction, limitation of the Thread Count to terminal access scale can be opened up by avoiding computer, by the selector of NIO to client（Terminal device）Into walking along the street management, and pass through each link state of selector time-sharing polling, realize the pattern for first accessing post processing, the substantial amounts of terminal links of one or several thread managements can be passed through, the upper limit of single server number of access terminals is greatly improved, reduces requirement of the system to server hardware performance, improves the stability of program, this reliability and maintainability accessed to extensive distribution terminal is greatly improved, and has a good application prospect.

Description

Method of accessing terminal equipment from NIO-based power distribution terminal data acquisition platform

technical field

The invention relates to a method for accessing terminal equipment from a NIO-based power distribution terminal data collection platform, and belongs to the technical field of power distribution automation.

Background technique

As the last link of the power transmission and distribution system, the degree of automation of the distribution network is closely related to the quality and reliability of power supply and consumption.

In recent years, the smart distribution network is an important part of the construction of the smart grid. It integrates modern computer technology and communication network technology to monitor, coordinate and control the equipment on the distribution network in real time. , An important means to improve the reliability of power supply, expand the power supply capacity, and realize the efficient and economical operation of the distribution network.

An important feature of the distribution network is that the terminal equipment has a wide range of points, which leads to high costs for the construction and maintenance of distribution network automation. At present, the traditional power distribution acquisition server adopts the "multi-thread" communication mode, while the power distribution terminal is often in the long connection mode. When the link communication reaches the upper limit, there will be problems that cannot be expanded. In addition, the communication efficiency within a single thread Also lower, will affect the performance of this system. Therefore, how to develop a power distribution terminal data acquisition platform that is not controlled by the number of threads and increase the number of terminal devices connected to a single server is of great significance and is a problem that continues to be solved.

Contents of the invention

The purpose of the present invention is to overcome the problem that the existing power distribution collection server adopts the "multi-thread" communication mode, which cannot be expanded, and the communication efficiency in a single thread is also low. The method for accessing terminal equipment based on the NIO-based power distribution terminal data acquisition platform of the present invention manages the link of the client (terminal equipment) based on NIO technology, and polls the status of each link through the selector in time-sharing, realizing the first access The post-processing mode can manage a large number of terminal links through one or several threads, effectively increasing the number of terminals connected to a single server, reducing the system's requirements for server hardware, and improving the stability and reliability of data collection sex.

In order to achieve the above object, the technical scheme adopted in the present invention is:

A method for accessing a terminal device based on an NIO-based power distribution terminal data acquisition platform, comprising the following steps,

Step (A), initialize the task controller, register the Channel channel on the server side to the selector, and add the corresponding event handler at the same time;

Step (B), obtain the socketChannel information list of the associated client through the selector, and connect to the legal client in turn;

Step (C), read the data operation of the client in a loop through the selector, and execute the read data by the event handler added to the Channel channel of the server in turn;

Step (D), after cyclically reading the data operations of all connected legal clients, close the Channel channel on the server side and close the selector.

The aforementioned NIO-based method for accessing terminal equipment from the power distribution terminal data acquisition platform, step (C), reads the data operation of the client through the selector cycle, and can use the system time slice to cycle through and read all connected legal clients end state.

The aforementioned method for accessing terminal equipment from the NIO-based power distribution terminal data acquisition platform, step (A) initializes the task controller, and registers the Channel channel on the server side to the selector, including the following steps,

(A1), to obtain the configuration information of the server;

(A2), determine whether the number of channels to be activated is greater than zero, if less than zero, continue to wait; if greater than zero, execute (A3);

(A3), register the Channel channel that needs to be started to the selector.

The aforementioned NIO-based method for accessing terminal equipment from a power distribution terminal data collection platform is characterized in that: step (B), obtain the socketChannel information list of the associated client through the selector, and connect to the legal client in turn, when there is a new When the client is associated, the task controller adds a SocketChannel to bind to the client, and updates the SocketChannel to the socketChannel information list, so that the selector can cyclically monitor whether data operations occur on the client corresponding to each SocketChannel.

The aforementioned NIO-based method for accessing terminal equipment from a power distribution terminal data collection platform is characterized in that: Step (C), through the selector, cyclically reads the data operations of the client, and sequentially adds the read data to the Channel channel on the server side The event handler is executed, including the following steps,

(C1), judge whether the current client running flag is closed, if it is closed, then judge the next client running flag; if it is not closed, then execute (C2);

(C2), according to the key value of the current client, judge whether to access the corresponding event handler, if so, access the corresponding event handler, and execute (C3); if not, execute directly (C3);

(C3), according to the key value of the current client, judge whether it is the event handler corresponding to the read operation, if yes, then execute the event handler corresponding to the read operation (C4); if not, execute directly (C4);

(C4), according to the key value of the current client, judge whether it is the event handler corresponding to the write operation, if yes, then execute the event handler corresponding to the write operation (C5); if not, execute directly (C5);

(C5), return to (C1), until the end of the loop reading of all connected legal clients.

The aforementioned method for accessing terminal equipment based on the NIO-based power distribution terminal data acquisition platform, step (A), the event processor is added with IEC60870-5-101 and IEC60870-5-104 protocol protocol processors to facilitate event processing After the device parses the read client data through the IEC60870-5-101 and IEC60870-5-104 protocol processor, it performs processing.

The beneficial effects of the present invention are: the method for accessing terminal equipment based on the NIO-based power distribution terminal data acquisition platform of the present invention overcomes the traditional "multi-thread communication" in which each client link corresponds to a sub-thread, and the sub-thread The thread needs to maintain and establish the disadvantage of data interaction, which avoids the limitation of the number of threads that can be opened up by the computer on the scale of terminal access, manages the path of the client (terminal device) through the selector of NIO, and polls each terminal in time through the selector. The link state realizes the mode of accessing first and then processing, and can manage a large number of terminal links through one or several threads, which greatly improves the upper limit of the number of terminals connected to a single server, and reduces the performance of the system on server hardware. It improves the stability of the program, greatly improves the reliability and maintainability of large-scale power distribution terminal access, and has a good application prospect.

Description of drawings

FIG. 1 is a flowchart of a method for accessing a terminal device from an NIO-based power distribution terminal data collection platform according to the present invention.

Detailed ways

The present invention will be further described below in conjunction with the accompanying drawings. The following examples are only used to illustrate the technical solution of the present invention more clearly, but not to limit the protection scope of the present invention.

According to the method for accessing the terminal device based on the NIO-based power distribution terminal data acquisition platform of the present invention, the data acquisition of the client (terminal setting) is realized based on NIO technology, and the terminal device link management is performed through the NIO communication technology, and the time-sharing is performed through the selector Polling the status of each link, realizing the mode of first access and then processing, and can manage a large number of terminal links through one or several threads, effectively increasing the number of single server terminal access, reducing the system's impact on server hardware Requirements, improve the stability and reliability of data collection, as shown in Figure 1, specifically include the following steps,

Step (A), initialize the task controller, register the server-side Channel channel to the selector, and at the same time, add the corresponding event handler, including the following steps,

(A1), to obtain the configuration information of the server;

(A2), determine whether the number of channels to be activated is greater than zero, if less than zero, continue to wait; if greater than zero, execute (A3);

(A3), register the Channel channel that needs to be started to the selector,

IEC60870-5-101 and IEC60870-5-104 protocol protocol processors are added in the event processor, which is convenient for the event processor to process the read client data through the IEC60870-5-101 and IEC60870-5-104 protocol protocol After the device parses, it executes processing, supports access to power distribution terminals whose communication protocols are IEC60870-5-101 and IEC60870-5-104, and can send the parsed collected data to other application services in the form of messages or E files;

Channel channel is the I/O object of NIO technology. Using Channel channel can complete the input and output of data flow. The data flow of Channel channel and external interaction is generally stored in Channel buffer. ChannelHandler is the business event processing base of NIO technology. class, when the server side is initialized, all event handlers added inherit from ChannelHandler, the event handler can read the data in the channel buffer, and pass the necessary business processing to the next event handler until all events are completed data processing work;

Step (B), obtain the socketChannel information list of the associated client through the selector, and connect to the legal client in turn. When there is a new client for association, the task controller adds a new SocketChannel to bind with the client, and Update the SocketChannel to the socketChannel information list, so that the selector can cyclically monitor whether data operations occur on the client corresponding to each SocketChannel;

Step (C), read the data operation of the client through the selector cycle, and execute the read data in turn by the event processor added to the Channel channel on the server side. The selector is the channel management class of NIO technology, which can use the system time slice , loop through and read all connected legal client states, including the following steps,

(C1), judge whether the current client running flag is closed, if it is closed, then judge the next client running flag; if it is not closed, then execute (C2);

(C2), according to the key value of the current client, judge whether to access the corresponding event handler, if so, access the corresponding event handler, and execute (C3); if not, execute directly (C3);

(C3), according to the key value of the current client, judge whether it is the event handler corresponding to the read operation, if yes, then execute the event handler corresponding to the read operation (C4); if not, execute directly (C4);

(C4), according to the key value of the current client, judge whether it is the event handler corresponding to the write operation, if yes, then execute the event handler corresponding to the write operation (C5); if not, execute directly (C5);

(C5), return to (C1), until the cyclic reading of all connected legal clients ends;

Step (D), after cyclically reading the data operations of all legally connected clients, close the Channel channel on the server side and close the selector.

In summary, the method for accessing terminal equipment based on the NIO-based power distribution terminal data collection platform of the present invention overcomes the traditional "multi-thread communication" in which each client link corresponds to a sub-thread, and the sub-thread needs The shortcomings of maintaining and establishing data interaction, avoiding the limitation of the number of threads that can be opened by the computer on the scale of terminal access, manage the client (terminal device) through the selector of NIO, and poll each link in time through the selector Status, realizes the mode of first access and then processing, and can manage a large number of terminal links through one or several threads, which greatly improves the upper limit of the number of terminals connected to a single server, and reduces the system's requirements for server hardware performance , which improves the stability of the program, which greatly improves the reliability and maintainability of large-scale power distribution terminal access, and has a good application prospect.

The basic principles, main features and advantages of the present invention have been shown and described above. Those skilled in the industry should understand that the present invention is not limited by the above-mentioned embodiments. What are described in the above-mentioned embodiments and the description only illustrate the principle of the present invention. Without departing from the spirit and scope of the present invention, the present invention will also have Variations and improvements are possible, which fall within the scope of the claimed invention. The protection scope of the present invention is defined by the appended claims and their equivalents.

Claims (6)

1. The method for accessing terminal equipment based on the distribution terminal data acquisition platform of NIO, is characterized in that: comprise the following steps, Step (A), initialize the task controller, register the Channel channel on the server side to the selector, and add the corresponding event handler at the same time; Step (B), obtain the socketChannel information list of the associated client through the selector, and connect to the legal client in turn; Step (C), read the data operation of the client in a loop through the selector, and execute the read data by the event handler added to the Channel channel of the server in turn; Step (D), after cyclically reading the data operations of all connected legal clients, close the Channel channel on the server side and close the selector. 2. The method for accessing terminal equipment based on the NIO-based power distribution terminal data collection platform according to claim 1, characterized in that: step (C), read the data operation of the client through the selector cycle, and the system time slice can be used , loop through and read all connected legal client states. 3. The method for accessing terminal equipment based on the NIO-based power distribution terminal data collection platform according to claim 1, characterized in that: step (A) initializes the task controller, and registers the Channel channel on the server side into the selector, including Following steps, (A1), to obtain the configuration information of the server; (A2), determine whether the number of channels to be activated is greater than zero, if less than zero, continue to wait; if greater than zero, execute (A3); (A3), register the Channel channel that needs to be started to the selector. 4. The method for accessing terminal equipment based on NIO-based power distribution terminal data acquisition platform according to claim 1, characterized in that: step (B), obtain the socketChannel information list of the associated client through the selector, and sequentially connect legal client, when there is a new client for association, the task controller adds a SocketChannel to bind to the client, and updates the SocketChannel to the socketChannel information list, so that the selector can cycle monitor the client corresponding to each SocketChannel Whether data operations occur at the end. 5. The method for accessing terminal equipment based on the NIO-based power distribution terminal data collection platform according to claim 1, characterized in that: step (C), read the data operation of the client through the selector cycle, and the read data The event handlers added by the server-side Channel channel are executed in turn, including the following steps, (C1), judge whether the current client running flag is closed, if it is closed, then judge the next client running flag; if it is not closed, then execute (C2); (C2), according to the key value of the current client, judge whether to access the corresponding event handler, if so, access the corresponding event handler, and execute (C3); if not, execute directly (C3); (C3), according to the key value of the current client, judge whether it is the event handler corresponding to the read operation, if yes, then execute the event handler corresponding to the read operation (C4); if not, execute directly (C4); (C4), according to the key value of the current client, judge whether it is the event handler corresponding to the write operation, if yes, then execute the event handler corresponding to the write operation (C5); if not, execute directly (C5); (C5), return to (C1), until the end of the loop reading of all connected legal clients. 6. The method for accessing terminal equipment based on the NIO-based power distribution terminal data acquisition platform according to claim 1, characterized in that: step (A), the event processor is added with IEC60870-5-101 and IEC60870- 5-104 protocol protocol processor, which is convenient for the event processor to analyze the read client data through the IEC60870-5-101 and IEC60870-5-104 protocol protocol processor, and then perform processing.