spring分佈式事務（jotm）

分佈式事務是指操做多個數據庫之間的事務，在tomcat下，是沒有分佈式事務的，不過能夠藉助於第三方軟件jotm（Java Open Transaction Manager ）和AtomikosTransactionsEssentials實現，

(PS:Spring3 已經再也不支持jotm了,我如今使用 AtomikosTransactionsEssentials)

在spring中分佈式事務是經過jta（jotm，atomikos）來進行實現，下面是採用jotm進行實現spring跨庫之間的事務

jotm下載地址：http://jotm.ow2.org/xwiki/bin/view/Main/Download_Releases

我採用的是2.1.4版本的，解壓后里面有不少jar包，只須要提取其中的幾個便可：

carol.jar，howl.jar，jotm-core.jar，jotm-datasource.jar，ow2-connector-1.5-spec.jar，ow2-jta-1.1-spec.jar，xapool.jar，jotm-client.jar，commons-cli-1.0.jar

applicationContext.xml配置以下：

<?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: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-2.5.xsd
http://www.springframework.org/schema/tx
http://www.springframework.org/schema/tx/spring-tx-2.5.xsd
http://www.springframework.org/schema/aop
http://www.springframework.org/schema/aop/spring-aop-2.5.xsd ">

<bean id="jotm" class="org.springframework.transaction.jta.JotmFactoryBean"/>

<!--定義jta事務-->

<bean id="tsManager" class="org.springframework.transaction.jta.JtaTransactionManager">
<property name="userTransaction" ref="jotm"/>
</bean>

<!--使用xapool鏈接池-->

<bean id="familyDataSource" class="org.enhydra.jdbc.pool.StandardXAPoolDataSource" destroy-method="shutdown">
<property name="dataSource">
    <bean class="org.enhydra.jdbc.standard.StandardXADataSource" destroy-method="shutdown">
      <property name="transactionManager" ref="jotm"/>
      <property name="driverName" value="com.mysql.jdbc.Driver"/>
      <property name="url" value="jdbc:mysql://localhost:3306/systemdb"/>
    </bean>
</property>
<property name="user" value="root"/>
<property name="password" value="123456"/>
</bean>

<bean id="localDataSource" class="org.enhydra.jdbc.pool.StandardXAPoolDataSource" destroy-method="shutdown">
<property name="dataSource">
    <bean class="org.enhydra.jdbc.standard.StandardXADataSource" destroy-method="shutdown">
      <property name="transactionManager" ref="jotm"/>
      <property name="driverName" value="com.mysql.jdbc.Driver"/>
      <property name="url" value="jdbc:mysql://localhost:3306/userdb"/>
    </bean>
</property>
<property name="user" value="root"/>
<property name="password" value="123456"/>
</bean>

<bean id="sessionFactorySystemdb"
class="org.springframework.orm.hibernate3.LocalSessionFactoryBean">
<property name="mappingDirectoryLocations">
    <list>
      <value>classpath:/cn/luotoo/system/model</value>
    </list>
</property>
<property name="hibernateProperties">
    <props>
      <prop key="hibernate.dialect">
        org.hibernate.dialect.MySQLDialect
      </prop>
      <prop key="hibernate.show_sql">true</prop>
      <prop key="hibernate.batch_size">15</prop>
      <prop key="hibernate.connection.autocommit ">false</prop>
      
    </props>
</property>
<property name="dataSource">
    <ref bean="familyDataSource"/>
</property>
</bean>

<!-- userdb sessionFactory -->

<bean id="sessionFactoryUserdb"
class="org.springframework.orm.hibernate3.LocalSessionFactoryBean">
<property name="mappingDirectoryLocations">
    <list>
      <value>classpath:/cn/luotoo/user/model</value>
    </list>
</property>
<property name="hibernateProperties">
    <props>
      <prop key="hibernate.dialect">
        org.hibernate.dialect.MySQLDialect
      </prop>
      <prop key="hibernate.show_sql">true</prop>
      <prop key="hibernate.batch_size">15</prop>
      <prop key="hibernate.connection.autocommit ">false</prop>
    </props>
</property>
<property name="dataSource">
    <ref bean="localDataSource"/>
</property>
</bean>
<tx:advice id="txAdvice" transaction-manager="tsManager">
<tx:attributes>
    <tx:method name="*" propagation="REQUIRED"/>
</tx:attributes>
</tx:advice>
<!--面向切面事務-->

<aop:config>
<aop:advisor pointcut="execution(* cn.luotoo.user.service.*.*(..))" advice-ref="txAdvice"/>
<aop:advisor pointcut="execution(* cn.luotoo.system.service.*.*(..))" advice-ref="txAdvice"/>
<!--
<aop:pointcut id="interceptorPointCuts"
expression="execution(* cn.luotoo.user.service.*.*(..))"/>
<aop:advisor advice-ref="txAdvice"
pointcut-ref="interceptorPointCuts"/>-->
</aop:config>

<bean id="userDao" class="cn.luotoo.user.dao.impl.UserDaoHibernate">
<property name="sessionFactory">
    <ref local="sessionFactoryUserdb"/>
</property>
</bean>

<bean id="userService" class="cn.luotoo.user.service.impl.UserServiceImpl">
<property name="userDao"><ref local="userDao"/></property>
<property name="testDao"><ref local="testDao"/></property>
</bean>
<bean id="testDao" class="cn.luotoo.system.dao.impl.TestDaoHibernate">
<property name="sessionFactory">
    <ref local="sessionFactorySystemdb"/>
</property>
</bean>

<bean id="testService" class="cn.luotoo.system.service.impl.TestServiceImpl">
<property name="testDao">
    <ref local="testDao"/>
</property>
</bean>

</beans>