Detailed explanation of five injection methods of Spring transaction Transaction configuration-javaTutorial-php.cn

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

<?xml version="1.0"encoding="UTF-8"?> 
 <beans xmlns="http://www.springframework.org/schema/beans" 
 xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 
 xmlns:context="http://www.springframework.org/schema/context" 
 xmlns:aop="http://www.springframework.org/schema/aop" 
 xsi:schemaLocation="http://www.springframework.org/schema/beans 
 www.springframework.org/schema/beans/spring-beans-2.5.xsd 
 www.springframework.org/schema/context 
 www.springframework.org/schema/context/spring-context-2.5.xsd 
 www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-2.5.xsd"> 
 
 <bean id="sessionFactory" 
 class="org.springframework.orm.hibernate3.LocalSessionFactoryBean"> 
 <property name="configLocation" value="classpath:hibernate.cfg.xml" /> 
 <property name="configurationClass" value="org.hibernate.cfg.AnnotationConfiguration" /> 
 </bean> 
 
 <!-- 定义事务管理器（声明式的事务） --> 
 <bean id="transactionManager" 
 class="org.springframework.orm.hibernate3.HibernateTransactionManager"> 
 <property name="sessionFactory" ref="sessionFactory" /> 
 </bean> 
 
 <!-- 配置DAO --> 
 <bean id="userDaoTarget" class="com.bluesky.spring.dao.UserDaoImpl"> 
 <property name="sessionFactory" ref="sessionFactory" /> 
 </bean> 
 
 <bean id="userDao" 
 class="org.springframework.transaction.interceptor.TransactionProxyFactoryBean"> 
 <!-- 配置事务管理器 --> 
 <property name="transactionManager" ref="transactionManager" /> 
 <property name="target" ref="userDaoTarget" /> 
 <property name="proxyInterfaces" value="com.bluesky.spring.dao.GeneratorDao" /> 
 <!-- 配置事务属性 --> 
 <property name="transactionAttributes"> 
 <props> 
 <prop key="*"> PROPAGATION_REQUIRED </prop> 
 </props> 
 </property> 
 </bean> 
 </beans>

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

<?xml version="1.0"encoding="UTF-8"?> 
 <beans xmlns="http://www.springframework.org/schema/beans" 
 xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 
 xmlns:context="http://www.springframework.org/schema/context" 
 xmlns:aop="http://www.springframework.org/schema/aop" 
 xsi:schemaLocation="http://www.springframework.org/schema/beans 
 www.springframework.org/schema/beans/spring-beans-2.5.xsd 
 www.springframework.org/schema/context 
 www.springframework.org/schema/context/spring-context-2.5.xsd 
 www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-2.5.xsd"> 
 
 <bean id="sessionFactory" 
 class="org.springframework.orm.hibernate3.LocalSessionFactoryBean"> 
 <property name="configLocation" value="classpath:hibernate.cfg.xml" /> 
 <property name="configurationClass" value="org.hibernate.cfg.AnnotationConfiguration" /> 
 </bean> 
 
 <!-- 定义事务管理器（声明式的事务） --> 
 <bean id="transactionManager" 
 class="org.springframework.orm.hibernate3.HibernateTransactionManager"> 
 <property name="sessionFactory" ref="sessionFactory" /> 
 </bean> 
 
 <bean id="transactionBase" 
 class="org.springframework.transaction.interceptor.TransactionProxyFactoryBean" 
 lazy-init="true" abstract="true"> 
 <!-- 配置事务管理器 --> 
 <property name="transactionManager" ref="transactionManager" /> 
 <!-- 配置事务属性 --> 
 <property name="transactionAttributes"> 
 <props> 
 <prop key="*">PROPAGATION_REQUIRED </prop> 
 </props> 
 </property> 
 </bean> 
 
 <!-- 配置DAO --> 
 <bean id="userDaoTarget" class="com.bluesky.spring.dao.UserDaoImpl"> 
 <property name="sessionFactory" ref="sessionFactory" /> 
 </bean> 
 
 <bean id="userDao" parent="transactionBase"> 
 <property name="target" ref="userDaoTarget" /> 
 </bean> 
 </beans>

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Third method: Use interceptor

<?xml version="1.0"encoding="UTF-8"?> 
 <beans xmlns="http://www.springframework.org/schema/beans" 
 xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 
 xmlns:context="http://www.springframework.org/schema/context" 
 xmlns:aop="http://www.springframework.org/schema/aop" 
 xsi:schemaLocation="http://www.springframework.org/schema/beans 
 www.springframework.org/schema/beans/spring-beans-2.5.xsd 
 www.springframework.org/schema/context 
 www.springframework.org/schema/context/spring-context-2.5.xsd 
 www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-2.5.xsd"> 
 
 <bean id="sessionFactory" 
 class="org.springframework.orm.hibernate3.LocalSessionFactoryBean"> 
 <property name="configLocation" value="classpath:hibernate.cfg.xml" /> 
 <property name="configurationClass" value="org.hibernate.cfg.AnnotationConfiguration" /> 
 </bean> 
 
 <!-- 定义事务管理器（声明式的事务） --> 
 <bean id="transactionManager" 
 class="org.springframework.orm.hibernate3.HibernateTransactionManager"> 
 <property name="sessionFactory" ref="sessionFactory" /> 
 </bean> 
 
 <bean id="transactionInterceptor" 
 class="org.springframework.transaction.interceptor.TransactionInterceptor"> 
 <property name="transactionManager" ref="transactionManager" /> 
 <!-- 配置事务属性 --> 
 <property name="transactionAttributes"> 
 <props> 
 <prop key="*">PROPAGATION_REQUIRED </prop> 
 </props> 
 </property> 
 </bean> 
 
 <bean class="org.springframework.aop.framework.autoproxy.BeanNameAutoProxyCreator"> 
 <property name="beanNames"> 
 <list> 
 <value> *Dao </value> 
 </list> 
 </property> 
 <property name="interceptorNames"> 
 <list> 
 <value> transactionInterceptor </value> 
 </list> 
 </property> 
 </bean> 
 
 <!-- 配置DAO --> 
 <bean id="userDao" class="com.bluesky.spring.dao.UserDaoImpl"> 
 <property name="sessionFactory" ref="sessionFactory" /> 
 </bean> 
 </beans>

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Fourth method: Use tx tag configuration Interceptor

<?xml version="1.0"encoding="UTF-8"?> 
 <beans xmlns="http://www.springframework.org/schema/beans" 
 xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 
 xmlns:context="http://www.springframework.org/schema/context" 
 xmlns:aop="http://www.springframework.org/schema/aop" 
 xmlns:tx="http://www.springframework.org/schema/tx" 
 xsi:schemaLocation="http://www.springframework.org/schema/beans 
 www.springframework.org/schema/beans/spring-beans-2.5.xsd 
 www.springframework.org/schema/context 
 www.springframework.org/schema/context/spring-context-2.5.xsd 
 www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-2.5.xsd 
 www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-2.5.xsd"> 
 
 <context:annotation-config /> 
 <context:component-scan base-package="com.bluesky" /> 
 
 <bean id="sessionFactory" 
 class="org.springframework.orm.hibernate3.LocalSessionFactoryBean"> 
 <property name="configLocation" value="classpath:hibernate.cfg.xml" /> 
 <property name="configurationClass" value="org.hibernate.cfg.AnnotationConfiguration" /> 
 </bean> 
 
 <!-- 定义事务管理器（声明式的事务） --> 
 <bean id="transactionManager" 
 class="org.springframework.orm.hibernate3.HibernateTransactionManager"> 
 <property name="sessionFactory" ref="sessionFactory" /> 
 </bean> 
 
 <tx:advice id="txAdvice" transaction-manager="transactionManager"> 
 <tx:attributes> 
 <tx:method name="*" propagation="REQUIRED" /> 
 </tx:attributes> 
 </tx:advice> 
 
 <aop:config> 
 <aop:pointcut id="interceptorPointCuts" 
 expression="execution(*com.bluesky.spring.dao.*.*(..))" /> 
 <aop:advisor advice-ref="txAdvice" 
 pointcut-ref="interceptorPointCuts" /> 
 </aop:config> 
 </beans>

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The fifth way: full annotation

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
 xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
 xmlns:context="http://www.springframework.org/schema/context"
 xmlns:aop="http://www.springframework.org/schema/aop"
 xmlns:tx="http://www.springframework.org/schema/tx"
 xsi:schemaLocation="http://www.springframework.org/schema/beans 
   www.springframework.org/schema/beans/spring-beans-2.5.xsd
   www.springframework.org/schema/context
   www.springframework.org/schema/context/spring-context-2.5.xsd
   www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-2.5.xsd
   www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-2.5.xsd">

 <context:annotation-config />
 <context:component-scan base-package="com.bluesky" />

 <tx:annotation-driven transaction-manager="transactionManager"/>

 <bean id="sessionFactory" 
   class="org.springframework.orm.hibernate3.LocalSessionFactoryBean"> 
  <property name="configLocation" value="classpath:hibernate.cfg.xml" /> 
  <property name="configurationClass" value="org.hibernate.cfg.AnnotationConfiguration" />
 </bean> 

 <!-- 定义事务管理器（声明式的事务） --> 
 <bean id="transactionManager"
  class="org.springframework.orm.hibernate3.HibernateTransactionManager">
  <property name="sessionFactory" ref="sessionFactory" />
 </bean>
</beans>

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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<User> listUsers() {
  return this.getSession().createQuery("from User").list();
 }  
}

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