How to understand Spring’s transaction management

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

•Spring is a lightweight J2EE based on JAVA The application framework

– is based on Java: the bottom layer is implemented by the Java language

–Lightweight: lower resource consumption and faster running speed

–J2EEFramework: serving the entire J2EEDevelopment 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

•Spring is very powerful and can serve J2EE Every 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

#Spring Data MongoDB in action

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