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brief introduction In the previous chapter, we introduced five models of IO. In fact, Java only supports three of them, namely, BIO/NIO/AIO. This article will introduce the evolution history of these three types of IO in Java, and analyze the story behind them from the perspective of use. Java BIO Analysis of BIO concept BIO, Blocking IO, Bloc ...

I. relationship between service name and port A port represents a service process, so a service name can be used instead of a port A port represents a service II. struct serve structure struct servent { char *s_name; /* official service name */ char **s_aliases; /* alias list */ int s_port; /* ...

1. UDP Programming Client: The party that initiated the access. 2. Server Side 3.server Segment Programming (1) Set up a socket, which is an instance responsible for specific communication (2) Binding, assigning fixed ports and IP addresses to socket s created (3) Accept the content sent by the other party (4) Send feedback to the other party, ...

Simple realization of serial port scanning gun The realization of scanning gun based on serial port communication mainly uses the SerialPort class to represent the serial port resources. The implementation is simple: Tools: usb to RS232 adapter / piece, scanning gun / set, Connect the serial port of scanning gun to the adapter, and plug the ...

Overview 1 stage of operation and maintenance management 1 manual phase Stare at the server manually. If there is a problem, go to the front of the machine, look up the log, check the status, and operate manually 2 script phase Start to write some automation scripts, start scheduled tasks, automatically start services, monitoring services, ...

Hello, I'm Tong Ge. This is the third part of netty series. Welcome to my company to learn the source code & Architecture systematically. Two things first (1) last Friday's article was repeated. It was caused by the wrong timing task setting, which brought us interference. I'm sorry. (2) the results of the previous questionnaire survey co ...

For more information: https://www.yuque.com/shizhiy... UDP programming of Java Socket programming UDP (User Datagram Protocol) is connectionless, unreliable, unordered and fastIn data transmission, first define the data to be transmitted as Datagram, and limit the size to 64k. In the Datagram, indicate the Socket (host address and port number) ...

First, construct a simple asynchronous network access Demo: 1. OkHttpClient client = new OkHttpClient(); 2. Request request = new Request.Builder() 3. .url("http://publicobject.com/helloworld.txt") 4. .build(); 6. client.newCall(request).enqueue(new Callback() { 7. @Override 8. public void onFailure(Call call, IOException e) { ...

Chat function is an important function in live APP production. In the development, it often involves different processing of received and sent messages according to different user classifications The treatment is as follows:1. When the user enters the room link socket, enter the specific room according to the user's properties if(socke ...

Introduction to related API s In the previous section, we have introduced some important knowledge points related to WebRTC, including the network protocols involved, session description protocols, how to make network penetration, and so on. The rest is the API of WebRTC. There are many API s related to WebRTC communication, which mainly accomp ...