[Spring of JAVAEE Series] 2003 Create and Use Bean

Bean s are often used to configure relevant information or to rely on injection to prevent hard coding and better unit testing. Bean management is done by Spring. When a Bean object is needed, Spring intercepts your request and returns the existing Bean object to you instead of creating a new object ...

Posted on Fri, 09 Aug 2019 02:20:56 -0700 by vietnamese

open-falcon deploys installation using docker

SECTION I ENVIRONMENTAL PREPARATION Operating environment VMware15+centos7 Install docker on centos Log in to Centos with root privileges. Use commands: & su root // When entering a password, the password is not displayed. The yum package is updated to the latest. # yum update Uninst ...

Posted on Thu, 08 Aug 2019 22:48:09 -0700 by Kardall

Spring-Common Notes and Role

1. Common Notes and Functions 1.1 @Configuration Declare that the current class is a configuration class (equivalent to an xml file for a Spring configuration) 1.2 @ComponentScan Automatically scan and register all classes using @Service,@Component,@Controller,@Repository under the specified package ...

Posted on Thu, 08 Aug 2019 18:46:04 -0700 by grungefreak

MySQL 5.7 Multi-Instance Installation Configuration

1. Background description MySQL multi-instance concept Simply put, it is to open multiple different service ports (e.g. 3306, 3307) on a single server and run multiple MySQL service processes, which provide their services through different socket s listening on different service ports. b. MySQL multi-instance roles and problems Effective uti ...

Posted on Wed, 07 Aug 2019 01:44:24 -0700 by JunbinDuan

MYSQL transaction, isolation level, lock

Four Characteristics of Transaction When it comes to database transactions, yes, we first think of ACID, which is the four characteristics of transactions. A Atomicity C Consistency I Isolation D Persistence The problems brought about by it What problems will these four characteristics of transactions b ...

Posted on Tue, 06 Aug 2019 20:37:01 -0700 by cwiddowson

Linux Experiment 1 Common Commands and Shell Programming for Linux

Experiment 1 Linux Common Commands and Shell Programming I. Experimental Contents 1. Exercise a) When running the program on the command line, the Linux system searches a series of directories in the $PATH variable to find the corresponding files, writes a script to output all executable files in th ...

Posted on Sun, 04 Aug 2019 00:54:53 -0700 by importune

Introduction to egg.js

Links to the original text: https://www.cnblogs.com/rope/p/10859014.html What is Egg? Egg.js is an enterprise-level framework and application. It is hoped that Egg.js will breed more upper-level frameworks to help development teams and dev ...

Posted on Sat, 03 Aug 2019 03:58:01 -0700 by Residue

What is the ghost of MySQL binlog failing to recover data based on time?

Problem phenomena A customer feedback, when using binlog to do point-based recovery, often fails to correctly restore data (the probability is about 5%~10%). The database environment provides MySQL 5.7.27 version of cascade replication topology (A->B->C), main library A provides write ...

Posted on Thu, 01 Aug 2019 20:37:55 -0700 by dougp23

Linux Installation of MySQL and Basic Operations

In order to provide more abundant and powerful web application functions, it often needs the support of background database, web programming and other roles. In general small and medium-sized enterprises, the most commonly used database is MySQL. MySQL is a truly multi-threaded, multi-user SQL database ...

Posted on Thu, 01 Aug 2019 20:21:38 -0700 by blyz

ansible's playbook uses, judges, loops, and roles

ansible 3rd playbook Conditional Judgment, Cycle and roles Hierarchical Management 1. ansible playbook's judgment, cyclic syntax: In ansible playbook, when syntax can be used to make judgments and loops through with_items, with the following examples: --- vim httpd_v4.yaml - hosts: websrvs remote_user: '{{uservar}}' vars: ...

Posted on Wed, 31 Jul 2019 16:12:16 -0700 by abolmeer