How to understand Spring's transaction management

This article will show in detail how Spring Data MongoDB accesses the MongoDB database.

•Springis a lightweightJ2EEbased onJAVAThe application framework

–is based onJava: the bottom layer is implemented by theJavalanguage

–Lightweight: lower resource consumption and faster running speed

–J2EEFramework: serving the entireJ2EEDevelopment process

–webThe hierarchical design structure of the program

–Presentation layer/View layer/Weblayer (Servlet/JSP,Struts2,...)

–Logic layer/Business layer

–Data layer/Persistence layer (JDBC,Hibernate3、…）

–(Understand)Service layer, domain model layer

•Springis very powerful and can serveJ2EEEvery level in the development process

1. What is a transaction

Success will only occur if all tasks are successful. As long as one fails, it will not succeed

2. Characteristics of transactions

3 Reading problems will occur if isolation is not considered

4 Solve the reading problem

(1) Set the isolation level

Spring transaction management api

1 .Two ways of spring transaction management

The first one: programmatic transaction management (implementation by writing code)

The second one: declarative transaction management

(1) Implementation based on xml configuration files

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