Detailed explanation of five injection methods of Spring transaction Transaction configuration

This article mainly introduces the five injection methods of Spring transaction configuration in detail. It has certain reference value. Interested friends can refer to it.

I did some in-depth research on spring's transaction configuration some time ago. Although I have also configured Spring's transaction configuration during this period, I have never had a clear understanding of it. Through this study, I found that Spring's transaction configuration is relatively easy to master as long as the ideas are clarified.

The summary is as follows:

The transaction configuration in the Spring configuration file always consists of three components, namely DataSource, TransactionManager and proxy mechanism. No matter where A configuration method, generally only the proxy mechanism changes.

DataSource and TransactionManager will only change according to the data access method. For example, when using hibernate for data access, the DataSource is actually SessionFactory, and the implementation of TransactionManager is HibernateTransactionManager.

The details are as follows:

#Based on the different proxy mechanisms, five Spring transaction configuration methods are summarized. The configuration files are as follows :

The first way: Each Bean has a proxy

                       PROPAGATION_REQUIRED     

The second way Method: All Beans share a proxy base class

                PROPAGATION_REQUIRED            

Third method: Use interceptor

               PROPAGATION_REQUIRED         *Dao       transactionInterceptor         

Fourth method: Use tx tag configuration Interceptor

The fifth way: full annotation

At this time, the @Transactional annotation needs to be added to the DAO, as follows:

package com.bluesky.spring.dao; import java.util.List; import org.hibernate.SessionFactory; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.orm.hibernate3.support.HibernateDaoSupport; import org.springframework.stereotype.Component; import com.bluesky.spring.domain.User; @Transactional @Component("userDao") public class UserDaoImpl extends HibernateDaoSupport implements UserDao { public List listUsers() { return this.getSession().createQuery("from User").list(); } }

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