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Kafka -- cluster building Service discovery: first of all, the mutual discovery of services between kfakas is realized by using Zookeeper. Therefore, Zookeeper must be built in advance. To build a Zookeeper cluster, please pay attention to the blog's article: Building Zookeeper cluster；Service relat ...

1, Introduction to front end development As a programmer, if you want to develop a website, its essence is to receive the browser's request and return the data to the socket server, and the returned data format should conform to the rules recognized by the browser. The purpose of the front-end development course is to take you to learn all th ...

Take a look at the simplest example of CGLIB, and feel how AOP is achieved? /** * Created with vernon-test * Description: * User: chenyuan * Date: 16/4/25 * Time: 9:25 am */ public class Target { public String execute() { String message = "----------test()----------"; System.out.println(message); return message ...

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The pattern is separated from the language, and the singleton pattern in the design pattern is very important in the concurrency. We should not indulge in the language and architecture, but think about the problem from the design point of view. Technology is the easiest to be replaced. Only by formin ...

1. Environment OS environment: Linux db01 2.6.32-431.el6.i686 MySQL version: mysql-5.5.44 MySQL installation path: /usr/local/mysql MySQL data path: /data MySQL port: 3506 3507 2. Preparations 1. Dependent Package Installation yum install ncurses-devel libaio-devel gcc gcc-c++ bison -y 2. Install compiler ...

Adding fields to a table of ten million or more levels in MySQL has always been a headache. In this case, how to deal with it? This paper uses three common scenarios to illustrate the case. 1. Environmental preparation Database version: 5.7.25-28 (Percona branch) Server configuration: three centos 7 virtual machines with 2CPU 2G memory Database ...

Since C++11, it has provided many traversal tools. Some tools in the boost library have also entered the C + + standard library. Boost, as a "quasi" standard library, is also the knowledge and skills that C + + needs to master as much as possible. Now we use std::bind to realize the asynchrono ...

1. Background: Because wechat applets need to be developed in light weight, cross platform and short development time, many companies regard applets as the first APP for business presentation. The communication part of E-chat client core SDK has been adapted to wechat applet platform. Let's share the ideas and methods in the adaptation process. ...

Basic information of LAN transmission 1. What is Io? ⦁ definition ⦁ blocking IO ⦁ non blocking IO 2.IO multiplexing definition select specific usage 3. Realize the file transmission of multiplex LAN server.py client.py FileOperation.py matters needing attention Operation effect 1. What is ...