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SpringAOP_ Set injection implementation Coupon website m.cps3 cn AOP_ Preliminary understanding of aspect oriented programming Let's imagine a scenario. You are writing a project, and multiple modules in the development process have a piece of repeated code, so you choose to abstract it into a method, and then call this method where necess ...

Feign introduction A central concept supported by feign of pring Cloud is named client Feign client uses @ feign client to register and assemble components and call remote server on demand Spring Cloud uses FeignClientsConfiguration to create a new collection as the ApplicationContext (application context) of each named client, including feign ...

Chapter 23 configuration management Ansible and Saltstack 1. Configuration management system The most commonly used CM systems: Ansible, Salt, Puppet, Chef Interpretation of configuration management terms Terms we useAnsibleSaltoperationtaskstateop typemodule (template)functionOperation list (OP)Tasks (multiple tasks)states (state set)b ...

Factory Mode Simple Factory Mode Case study: Chefs cook dishes as an example. Chefs can cook meat and fish and have customers order them public interface Chef { public void cook(); } public class Meet implements Chef{ @Override public void cook() { System.out.println("Cook pot meat~"); } } public class Fish impleme ...

HDOJ travel [by_041] There was once a preface catalogue ACM Steps Chapter One - phase 1 Section One - basic input and output It is a summary of the input and output of the classic ACM competition P1089: multiple groups of data, one group occupies one line, with two numbers until the end of EOFWhile (CIN > > a ...

1. Install Docker Official Web https://docs.docker.com/engine/install/centos/ # 1. Uninstall the old version yum remove docker \ docker-client \ docker-client-latest \ docker-common \ docker-latest \ docker-latest-logrotate \ docker-logrotate \ docker-engine # 2. Installation packages required yum install ...

Here I recommend my official account number: programmer sailing. Windows development history Microsoft Windows At first, it was developed by Microsoft in 1985 and gradually became the most popular version of Microsoft's operating system. MS-Dos Version numberRelease timeWindows1.01985.11Windows2.01987.12Windows2.11988Windows3.01990.5Windo ...

Maven series of project management (II) Create project, POM file, dependency mechanism Lifecycle, custom libraries, external dependencies       catalogue 1. Create Maven project 1.1. Command line / terminal creation 1.2. Eclipse creation 1.3 Java project transferred to Maven project 2. POM file 2.1 dependence 2.1.1,JUni ...

gRPC Go service discovery and load balancing https://blog.cong.moe/post/2021-03-06-grpc-go-discovery-lb/   gRPC It is a high performance RPC framework open source by Google and supports multiple languages It has been widely used in inter service invocation in cluster In order to large-scale traffic and avoid single point of failure, services ...

query Query all data select * from emp; Query the specified data select column / function select column_name1, column_name2, ... from table_name; select mgr from emp; +------+ | mgr | +------+ | 7902 | | 7698 | | 7698 | | 7839 | | 7698 | | 7839 | | 7566 | | NULL | | 7566 | +------+ Query to remove duplicate records The default search ...