选择哪种transaction manager?
在单数据源情况下，JDBC,Hibernate,ibatis等自带的 transaction manager已能用于处理事务。
但当设计多种数据源的事务处理时，上面的transaction manager就没法用了。这个时候可选事务管理组件有：Bitronix http://docs.codehaus.org/display/BTM,SimpleJTA http://simplejta.sourceforge.net/,Tyrex (dead?) http://jotm.objectweb.org/, JOTM (used in Jonas) http://jencks.codehaus.org/Transaction+Manager,GeronimoTM/Jencks (used in Geronimo) http://jencks.codehaus.org/Transaction+Manager,JBossTS (used in JBoss) http://www.jboss.org/jbosstm/ and Atomikos http://www.atomikos.com/. 其中Atomikos 被大多数人所推荐。
参考： http://stackoverflow.com/questions/2978207/atomikos-vs-jotm-vs-bitronix-vs
一个使用 Bitronix的applicationContext.xml
<?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
http://www.springframework.org/schema/beans/spring-beans-3.0.xsd
http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context-3.0.xsd
http://www.springframework.org/schema/aop
http://www.springframework.org/schema/aop/spring-aop-3.0.xsd
http://www.springframework.org/schema/tx
http://www.springframework.org/schema/tx/spring-tx-3.0.xsd"
default-autowire="byName" default-lazy-init="true">
<context:annotation-config/>
<context:component-scan base-package="org.jbpm.dao">
<context:include-filter type="annotation" expression="org.springframework.stereotype.Repository"/>
</context:component-scan>
<context:component-scan base-package="org.jbpm.service">
<context:include-filter type="annotation"
expression="org.springframework.stereotype.Service"/>
</context:component-scan>
<!-- =================================================================== -->
<!-- AOP: Configuration and Aspects -->
<!-- =================================================================== -->
<aop:config>
<aop:advisor id="managerTx" advice-ref="txAdvice" pointcut="execution(* *..service.*Manager.*(..))" order="0"/>
</aop:config>
<tx:advice id="txAdvice">
<tx:attributes>
<!-- Read-only commented out to make things easier for end-users -->
<!-- http://issues.appfuse.org/browse/APF-556 -->
<!--tx:method name="get*" read-only="true"/-->
<!--<tx:method name="save*" propagation="REQUIRES_NEW"/>-->
<!--<tx:method name="update*" propagation="REQUIRES_NEW"/>-->
<!--<tx:method name="remove*" propagation="REQUIRES_NEW"/>-->
<!--<tx:method name="get*" read-only="true"/>-->
<!--<tx:method name="list*" read-only="true"/>-->
<tx:method name="*"/>
</tx:attributes>
</tx:advice>
<!-- Enable @Transactional support -->
<!--<tx:annotation-driven/>-->
<!-- Enable @AspectJ support -->
<aop:aspectj-autoproxy/>
<!-- Enable @Configured support -->
<!--<aop:spring-configured/>-->
<bean id="propertyConfigurer" class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer">
<property name="locations">
<list>
<value>classpath:jdbc.properties</value>
</list>
</property>
</bean>
<bean id="basicdataSource" class="org.apache.commons.dbcp.BasicDataSource">
<property name="driverClassName" value="${jdbc.driverClassName}"/>
<property name="url" value="${jdbc.url}"/>
<property name="username" value="${jdbc.username}"/>
<property name="password" value="${jdbc.password}"/>
</bean>
<bean id="xadataSource" class="bitronix.tm.resource.jdbc.PoolingDataSource"
init-method="init" destroy-method="close">
<property name="className" value="com.mysql.jdbc.jdbc2.optional.MysqlXADataSource" />
<property name="uniqueName" value="jdbc/testDS1" />
<property name="minPoolSize" value="1" />
<property name="maxPoolSize" value="5" />
<property name="allowLocalTransactions" value="true" />
<property name="driverProperties">
<props>
<prop key="URL">${jdbc.url}</prop>
<prop key="user">${jdbc.username}</prop>
<prop key="password">${jdbc.password}</prop>
</props>
</property>
</bean>
<bean id="txManager"
class="org.springframework.transaction.jta.JtaTransactionManager">
<property name="transactionManager" ref="bitronixTransactionManager" />
<property name="userTransaction" ref="bitronixTransactionManager" />
</bean>
<bean id="bitronixTransactionManager" factory-method="getTransactionManager"
class="bitronix.tm.TransactionManagerServices" depends-on="xadataSource,txManager"
destroy-method="shutdown" />
<bean id="entityManagerFactory" class="org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean">
<property name="dataSource" ref="basicdataSource"/>
<property name="persistenceUnitName" value="leaveJPA"/>
<property name="persistenceXmlLocation" value="classpath:META-INF/persistence.xml" />
<property name="jpaVendorAdapter">
<bean class="org.springframework.orm.jpa.vendor.HibernateJpaVendorAdapter">
<property name="databasePlatform" value="org.hibernate.dialect.MySQL5InnoDBDialect" />
<property name="showSql" value="true" />
<property name="generateDdl" value="false" />
</bean>
</property>
</bean>
<bean id="entityManagerFactoryJbpmPersistanceJpa" class="org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean">
<property name="dataSource" ref="xadataSource" />
<property name="persistenceUnitName" value="org.jbpm.persistence.jpa" />
<property name="persistenceXmlLocation" value="classpath:META-INF/persistence.xml" />
<property name="jpaVendorAdapter">
<bean class="org.springframework.orm.jpa.vendor.HibernateJpaVendorAdapter">
<property name="databasePlatform" value="org.hibernate.dialect.MySQL5InnoDBDialect" />
<property name="showSql" value="true" />
<property name="generateDdl" value="false" />
</bean>
</property>
</bean>
<bean id="entityManagerFactoryJbpmTask" class="org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean">
<property name="dataSource" ref="basicdataSource" />
<property name="persistenceUnitName" value="org.jbpm.task" />
<property name="persistenceXmlLocation" value="classpath:META-INF/persistence.xml" />
<property name="jpaVendorAdapter">
<bean class="org.springframework.orm.jpa.vendor.HibernateJpaVendorAdapter">
<property name="databasePlatform" value="org.hibernate.dialect.MySQL5InnoDBDialect" />
<property name="showSql" value="true" />
<property name="generateDdl" value="false" />
</bean>
</property>
</bean>
<bean id="transactionManager" class="org.springframework.orm.jpa.JpaTransactionManager">
<property name="entityManagerFactory" ref="entityManagerFactory"/>
</bean>
<bean id="jpaTransactionManager" class="org.springframework.orm.jpa.JpaTransactionManager">
<property name="entityManagerFactory" ref="entityManagerFactoryJbpmPersistanceJpa"/>
</bean>
<bean id="taskTransactionManager" class="org.springframework.orm.jpa.JpaTransactionManager">
<property name="entityManagerFactory" ref="entityManagerFactoryJbpmTask"/>
</bean>
<bean class="org.springframework.orm.jpa.support.PersistenceAnnotationBeanPostProcessor"/>
<bean class="org.springframework.dao.annotation.PersistenceExceptionTranslationPostProcessor"/>
<!--<bean id="md5PasswordEncoder" class="org.springframework.security.authentication.encoding.Md5PasswordEncoder"/>-->
</beans>
一个使用 Atomikos的applicationContext.xml
<?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:tx="http://www.springframework.org/schema/tx"
xmlns:context="http://www.springframework.org/schema/context"
xmlns:aop="http://www.springframework.org/schema/aop"
xsi:schemaLocation="
http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.0.xsd
http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-3.0.xsd
http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-3.0.xsd
http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.0.xsd
http://www.springframework.org/schema/task http://www.springframework.org/schema/task/spring-task-3.0.xsd">
<!-- active component annotations like @Service,@Repository,@Component -->
<context:component-scan base-package="cmei.mysql" >
<!-- <context:include-filter type="regex" expression=".dao.*"/>-->
</context:component-scan>
<aop:aspectj-autoproxy/>
<!-- active annotations like @autowired, @required,... in java class,have to add xmlns:context to beans header-->
<!-- <context:annotation-config/> removed after using context:component-scan-->
<!--step1:dataSource from connection pool, must use atomikos data source -->
<bean id="dataSource11" class="com.atomikos.jdbc.AtomikosDataSourceBean" init-method="init" destroy-method="close">
<property name="xaDataSourceClassName" value="com.mysql.jdbc.jdbc2.optional.MysqlXADataSource" />
<property name="uniqueResourceName" value="mysql/test_transaction"></property>
<property name="poolSize" value="10"></property>
<property name="xaProperties">
<props>
<prop key="url">jdbc:mysql://localhost:3306/test_transaction</prop>
<prop key="user">root</prop>
<prop key="password"></prop>
</props>
</property>
</bean>
<bean id="dataSource22" class="com.atomikos.jdbc.AtomikosDataSourceBean" init-method="init" destroy-method="close">
<property name="xaDataSourceClassName" value="com.mysql.jdbc.jdbc2.optional.MysqlXADataSource" />
<property name="uniqueResourceName" value="mysql/test_transaction2"></property>
<property name="poolSize" value="10"></property>
<property name="xaProperties">
<props>
<prop key="url">jdbc:mysql://localhost:3306/test_transaction2</prop>
<prop key="user">root</prop>
<prop key="password"></prop>
</props>
</property>
</bean>
<!-- step2:sql session:mybatis -->
<bean id="sqlSessionFactory1" class="org.mybatis.spring.SqlSessionFactoryBean">
<property name="dataSource" ref="dataSource11" />
<property name="mapperLocations" value="/mappers/*.xml" />
<property name="typeAliasesPackage" value="cmei.mysql.dao" />
</bean>
<bean id="sqlSessionFactory2" class="org.mybatis.spring.SqlSessionFactoryBean">
<property name="dataSource" ref="dataSource22" />
<property name="mapperLocations" value="/mappers/*.xml" />
<property name="typeAliasesPackage" value="cmei.mysql.dao" />
</bean>
<!-- step 3:config different daos and service-->
<bean id="accountDAO1" class="cmei.mysql.dao.AccountDAO">
<property name="sqlSessionFactory" ref="sqlSessionFactory1"></property>
</bean>
<bean id="accountDAO2" class="cmei.mysql.dao.AccountDAO">
<property name="sqlSessionFactory" ref="sqlSessionFactory2"></property>
</bean>
<bean id="accountService" class="cmei.mysql.dao.AccountService">
<property name="accountDAO1" ref="accountDAO1"></property>
<property name="accountDAO2" ref="accountDAO2"></property>
</bean>
<!-- step4:config transactionManager atomikos -->
<bean id="atomikosTransactionManager"
class="com.atomikos.icatch.jta.UserTransactionManager"
init-method="init" destroy-method="close">
<property name="forceShutdown" value="true"/>
</bean>
<bean id="atomikoUserTransaction" class="com.atomikos.icatch.jta.UserTransactionImp">
<property name="transactionTimeout" value="300"></property>
</bean>
<!-- step5:config spring JTA transactionManager -->
<bean id="springTransactionManager" class="org.springframework.transaction.jta.JtaTransactionManager">
<property name="transactionManager" ref="atomikosTransactionManager"></property>
<property name="userTransaction" ref="atomikoUserTransaction"></property>
</bean>
<!-- step6:config aop -->
<tx:annotation-driven transaction-manager="springTransactionManager" proxy-target-class="true" />
<tx:advice id="txAdvice" transaction-manager="springTransactionManager">
<tx:attributes>
<tx:method name="update*" rollback-for="Exception"/>
<tx:method name="*" read-only="true" rollback-for="Exception"/>
</tx:attributes>
</tx:advice>
<aop:config>
<aop:pointcut expression="execution(* cmei.mysql.dao.AccountService.transfer(..))" id="serviceOperation"/>
<aop:advisor advice-ref="txAdvice" pointcut-ref="serviceOperation"/>
</aop:config>
</beans>