如何配置Spring让JPA(Hibernate)和JDBC(JdbcTemplate或MyBatis)共享同一个事务

问题描述

我有一个数据源，我使用 Spring 3.0.3、Hibernate 3.5.1 作为 JPA 提供者，我使用 MyBatis 3.0.2 进行一些查询，我的应用程序在 Tomcat 6 上运行.我有一个 HibernateDAO 和一个 MyBatisDAO，当我从用@Transactional 注释的相同方法调用两者，看起来它们不共享相同的事务，它们获得不同的连接.
我怎样才能让他们去做?

I have a single dataSource, I use Spring 3.0.3, Hibernate 3.5.1 as JPA provider and I use MyBatis 3.0.2 for some queries and my app runs on Tomcat 6. I have a HibernateDAO and a MyBatisDAO, when I call both from the same method which is annotated with @Transactional it looks like they don't share the same transaction, they get different connections.
How can I make them to do?

我已经尝试从 DataSourceUtils.getConnection(dataSource) 获取连接，但我得到了 MyBatis 使用的连接，这很奇怪，我认为问题出在 MyBatis 配置中，它不能使用 JpaTransactionManager.即使多次调用 DataSoruceUtils.getConnection 也总是提供相同的连接，这没关系.

I've tried getting a connection from DataSourceUtils.getConnection(dataSource) and I get the one which is used by MyBatis which is strange I thought the problem was in MyBatis config and it can't use JpaTransactionManager. Even calling multiple times DataSoruceUtils.getConnection gives the same connection always, which is ok.

经过一番谷歌搜索后，我尝试了 spring-instrument-tomcat 的类加载器(虽然我不知道 tomcat 是否真的使用它:))

After some googling I've tried spring-instrument-tomcat's classloader (although I don't know if tomcat really uses it :))

部分应用上下文

<bean class="org.apache.commons.dbcp.BasicDataSource" destroy-method="close" id="dataSource">
    <property name="driverClassName" value="${database.driverClassName}"/>
    <property name="url" value="${database.url}"/>
    <property name="username" value="${database.username}"/>
    <property name="password" value="${database.password}"/>
</bean>

<bean class="org.springframework.orm.jpa.JpaTransactionManager" id="transactionManager">
    <property name="entityManagerFactory" ref="entityManagerFactory"/>
</bean>

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

<bean class="org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean" id="entityManagerFactory">
    <property name="dataSource" ref="dataSource"/>
</bean>

<bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
    <property name="dataSource" ref="dataSource" />
    <property name="configLocation" value="classpath:META-INF/mybatis/mybatis-config.xml" />
</bean>

mybatis 部分配置

partial mybatis config

<settings>
    <setting name="cacheEnabled" value="false" />
    <setting name="useGeneratedKeys" value="false" />
    <setting name="defaultExecutorType" value="REUSE" />
    <setting name="lazyLoadingEnabled" value="false"/>
</settings>

部分持久性.xml

<persistence-unit name="persistenceUnit" transaction-type="RESOURCE_LOCAL">
<provider>org.hibernate.ejb.HibernatePersistence</provider>

推荐答案

我在这里找到了解决方案:JBDC 模板应该使用什么事务管理器 使用 JPA 时?

I've found the solution here: What transaction manager should I use for JBDC template When using JPA ?

我使用的是 JpaTransactionManager 而不是 DataSourceTransactionManager.
JavaDoc http://static.springsource.org/spring/docs/3.0.x/javadoc-api/org/springframework/orm/jpa/JpaTransactionManager.html

I'm using JpaTransactionManager and not DataSourceTransactionManager.
JavaDoc http://static.springsource.org/spring/docs/3.0.x/javadoc-api/org/springframework/orm/jpa/JpaTransactionManager.html

此事务管理器还支持事务内的直接数据源访问(即使用相同数据源的普通 JDBC 代码).这允许混合访问 JPA 的服务和使用普通 JDBC 的服务(不知道 JPA)！应用程序代码需要坚持与 DataSourceTransactionManager 相同的简单连接查找模式(即 DataSourceUtils.getConnection(javax.sql.DataSource) 或通过 TransactionAwareDataSourceProxy).请注意，这需要配置特定于供应商的 JpaDialect.

在我将 jpaVendorAdapter 添加到我的 entityManagerFactory 配置后，一切正常，JdbcTemplate 查询和 MyBatis 都按预期在同一个事务中运行.基于 JavaDoc，我想 jpaDialect 应该足够了，但现在是凌晨 4 点，所以我现在不会尝试 :)

After I've added jpaVendorAdapter to my entityManagerFactory config everything works, both JdbcTemplate query and MyBatis runs in the same transaction as expected. Based on the JavaDoc I guess a jpaDialect should be enough but it's 4 a.m. here so I won't try that now :)

<bean class="org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean" id="entityManagerFactory">
    <property name="persistenceUnitName" value="persistenceUnit"/>
    <property name="dataSource" ref="dataSource"/>
    <property name="jpaVendorAdapter">
        <bean class="org.springframework.orm.jpa.vendor.HibernateJpaVendorAdapter">
            <property name="showSql" value="true" />
            <property name="generateDdl" value="true" />
            <property name="databasePlatform" value="org.hibernate.dialect.PostgreSQLDialect" />
        </bean>
    </property>
</bean>

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