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Simple enough To be honest, to implement transaction management and add an annotation to a method, the method automatically implements transactions, which is simple enough. I can't think of anything simpler. This annotation is @ Transactional, which is so excellent. Declarative transaction management ...

1. MySQL functions Official website: https://dev.mysql.com/doc/refman/5.7/en/func-op-summary-ref.html 1.1. Common Functions -- ==================== Common Functions ============================= -- Mathematical operations SELECT ABS(-8) -- absolute value SELECT CEILING(9.4) -- ceil SELECT FLOOR(9. ...

JDBC development steps 1. Registration driver ---Tell the JVM which database driver to use 2. Get connected ---Use the classes in JDBC to complete the connection to the MySQL database 3. Get statement execution platform ---Get the executor object of the SQL statement through the connection object ...

An overview of Roles Roles can automatically load variable files, task s, handlers, and so on, depending on the hierarchy. Simply put, Roles is about including variables, files, tasks, modules, and processors in separate directories and easily. Roles is typically used in scenarios where services are built on hosts, but it can also be used in s ...

1, concept Spring Batch is a lightweight batch processing framework suitable for enterprise applications. It is worth noting that unlike other scheduling frameworks, Spring Batch does not provide scheduling functions. 2. Batch process Batch processing can be divided into the following steps: Read data Process data according to business The pr ...

springboot+mybatis for data addition and deletion In the previous article about creating springboot projects with idea, let's talk about using mybatis for curd. 1. Database Creation 2. The pom.xml file adds mysql dependencies, etc. <!--mysql rely on--> <dependency> ...

inventory host list The default host list of ansible is the / etc/ansible/hosts file. The host list can be set manually or generated dynamically through Dynamic Inventory. Generally, the host name uses FQDN vim /etc/ansible/hosts [webserver] #Square bracket set group name www1.example.org #Define the monit ...

1, Ansible installation Environmental preparation Management end: CentOS 7-2 192.168.18.147Managed end 1: CentOS 7-3 192.168.18.128Managed end 2: CentOS 7-4 192.168.18.148 Management side: [root@localhost ~]# systemctl stop firewalld.service [root@localhost ~]# setenforce 0 [root@localhost ~]# yum install epel-release -y [root@localhost ~]# ...

Transaction Delivery Properties for the 200202-SpringBoot series of tutorials For mysql, there may be several main points of knowledge about transactions at the isolation level; in the Spring system, there is also a transfer property of knowledge point transactions that is equally important when using transactions. This article will focus on ...

[Problem Description] Queries_per_sec (QPS) is two important performance counter metrics for databases.We often require development to inform this parameter to evaluate a load on the database.The following code connects to the server to make a simple query: using (MySqlConnection conn = new MySqlConnection()) { conn.ConnectionString = "Database ...