Programming VIP

Basic Introduction Pub/Sub function (means Publish, Subscribe) is the publishing and subscription function In event-based systems, Pub/Sub is a widely used communication model, which uses events as the basic communication mechanism to provide loosely coupled interaction modes required by large-scale systems: subscribers (such as clients) expre ...

Concurrent programming Concurrent (pseudo): Because of the speed of execution, it is not perceptible Parallel (true): create 10 simultaneous operations thread Single-process, single-threaded applications print('666') What exactly is a thread?What is a process Python does not have this on its own; the threads and processes of the operatin ...

In the previous article, we analyzed the accept process in the process SelectedKey method. This article will analyze the read process in the work thread. private static void processSelectedKey(SelectionKey k, AbstractNioChannel ch) { final NioUnsafe unsafe = ch.unsafe(); //Check the SelectionKey Is it valid? If it is invalid, close ...

I. Preface As a data source, database is widely used in many configuration software, such as specifying database type, filling in database connection information, specifying corresponding database tables and fields, acquisition interval, automatica ...

Read through this article, you will understand1. How netty accepts new requests2. How netty assigns reactor threads to new requests3. How netty adds ChannelHandler to each new connection reactor thread in netty There are two types of reactor threads at the core of netty. They can be regarded as two types of engines in netty, which drive the w ...

Network programming Architecture of Software Development Application class: QQ Weixinpin FTP mesh disk and so on, which belongs to the application class that needs to be installed. WEB class: such as Baidu, Zhizhi, Weibo and other applications that can be directly used by browser access C/S Architecture C/S (Client and Server), Chinese mean ...

ZooKeeper's election process defaults to the FastLeaderElection class, which starts Messenger to send and receive election information when FastLeaderElection starts. After the election is completed, one Leader and several Follower are selected. First understand several concepts: Epoch: The voting cycle is used to distinguish each round, and ...

First, concept introduction. Ribbon: Load balancing is a multi-instance load balancing configuration for services. Hystrix: Fuse, when calling zuul Gateway specific business, may be affected by the network, code execution time and so on for a ...

Before we start learning network programming, let's first understand what TCP protocol is: TCP/IP(Transmission Control Protocol/Internet Protocol), which is a connection-oriented, reliable, byte-stream-based Transport layer communication protocol. I ...

TCP and Concurrent Server Unlike UDP, it is a connection-oriented, reliable data transmission protocol. TCP Communication is Complicated Write a TCP server first. The general steps are as follows: 1. The first step is to create a socket socket: socket() 2. Servers usually need a fixed IP address and a fixed port number. Servers need to bin ...