如果容器支持jta,那么spring配置起来非常简单,因为spring提供了JtaTransactionManager,在这里面提供了几乎所有的服务器的jta的jndi名字,比如
* "java:comp/UserTransaction" for Resin 2.x, Oracle OC4J (Orion), JOnAS (JOTM), BEA WebLogic
* "java:comp/TransactionManager" for Resin 3.x
* "java:appserver/TransactionManager" for GlassFish
* "java:pm/TransactionManager" for Borland Enterprise Server and Sun Application Server (Sun ONE 7 and later)
* "java:/TransactionManager" for JBoss Application Server
由于大部分服务器获取jta的方式都不尽相同,spring还针对不同的服务器提供了不同的jta实现,例如:
WebLogicJtaTransactionManager
WebSphereUowTransactionManager
OC4JJtaTransactionManager
不管是jdbc、hibernate还是ibatis,都可以通过JtaTransactionManager来配置分布式事务
分布式事务是指操作多个数据库之间的事务,spring的org.springframework.transaction.jta.JtaTransactionManager,提供了分布式事务支持。如果使用WAS的JTA支持,把它的属性改为WebSphere对应的TransactionManager。
在tomcat下,是没有分布式事务的,不过可以借助于第三方软件jotm(Java Open Transaction Manager )和AtomikosTransactionsEssentials实现,在spring中分布式事务是通过jta(jotm,atomikos)来进行实现。
1.ProductDao.java
package com.spring.jtaTransactionManager; public interface ProductDao { public void save(String sql); public void save(String sqlA, String sqlB); }2.ProductDaoImpl.java
package com.spring.jtaTransactionManager; import javax.annotation.Resource; import org.springframework.jdbc.core.JdbcTemplate; import org.springframework.stereotype.Repository; @Repository("productDao") public class ProductDaoImpl implements ProductDao { @Resource private JdbcTemplate jdbcTemplateA; @Resource private JdbcTemplate jdbcTemplateB; @Override public void save(String sql) { jdbcTemplateA.execute(sql); } @Override public void save(String sqlA, String sqlB) { jdbcTemplateA.execute(sqlA); jdbcTemplateB.execute(sqlB); } }3.ProductManager.java
package com.spring.jtaTransactionManager; public interface ProductManager { public void save(String sql); public void save(String sqlA, String sqlB); }4.ProductManagerImpl.java
package com.spring.jtaTransactionManager; import javax.annotation.Resource; import org.springframework.stereotype.Service; @Service("productManager") public class ProductManagerImpl implements ProductManager{ @Resource private ProductDao productDao; @Override public void save(String sql) { productDao.save(sql); } @Override public void save(String sqlA, String sqlB) { productDao.save(sqlA, sqlB); } }5.SimpleSpringJtaDemo.java
package com.spring.jtaTransactionManager; import java.sql.SQLException; import javax.naming.NamingException; import org.springframework.context.ApplicationContext; import org.springframework.context.support.FileSystemXmlApplicationContext; public class SimpleSpringJtaDemo { public static void main(String[] args) throws NamingException, SQLException { ApplicationContext app = new FileSystemXmlApplicationContext("src/com/spring/jtaTransactionManager/spring-jta.xml"); ProductManager p = (ProductManager)app.getBean("productManager"); String sqlA = "INSERT INTO t_product VALUES (1, 'Jta测试事务');"; String sqlB = "INSERT INTO t_receiver VALUES (1,'Jta测试事务');"; p.save(sqlA, sqlB); } }6.configuration.properties
database.driver=com.mysql.jdbc.Driver database.url=jdbc:mysql://127.0.0.1/jinhonglun?useEncoding=true&characterEncoding=UTF-8 database.username=root database.password=root hibernate.dialect=org.hibernate.dialect.MySQL5Dialect hibernate.show_sql=true database2.driver=com.mysql.jdbc.Driver database2.url=jdbc:mysql://127.0.0.1/winchannel?useEncoding=true&characterEncoding=UTF-8 database2.username=root database2.password=root hibernate2.dialect=org.hibernate.dialect.MySQL5Dialect hibernate2.show_sql=true7.spring-jta.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:p="http://www.springframework.org/schema/p" xmlns:context="http://www.springframework.org/schema/context" xmlns:tx="http://www.springframework.org/schema/tx" xmlns:util="http://www.springframework.org/schema/util" xmlns:aop="http://www.springframework.org/schema/aop" xsi:schemaLocation=" http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-2.5.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-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/util http://www.springframework.org/schema/util/spring-util-2.5.xsd http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-2.5.xsd"> <description>springJTA</description> <!-- 自动扫描包,自动将@Repository、@Service、@Controller 和 @Component自动实例化 --> <context:component-scan base-package="com.spring.jtaTransactionManager" /> <!--指定Spring配置中用到的属性文件--> <bean id="propertyConfig" class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer"> <property name="locations"> <list> <value>classpath:/com/spring/jtaTransactionManager/configuration.properties</value> </list> </property> </bean> <!-- JOTM实例 --> <bean id="jotm" class="org.springframework.transaction.jta.JotmFactoryBean"> <property name="defaultTimeout" value="500000"/> </bean> <!-- JTA事务管理器 --> <bean id="jtaTransactionManager" class="org.springframework.transaction.jta.JtaTransactionManager"> <property name="userTransaction" ref="jotm" /> </bean> <!-- 数据源A --> <bean id="dataSourceA" 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="${database.driver}"/> <property name="url" value="${database.url}"/> </bean> </property> <property name="user" value="${database.username}"/> <property name="password" value="${database.password}"/> </bean> <!-- 数据源B --> <bean id="dataSourceB" 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="${database2.driver}"/> <property name="url" value="${database2.url}"/> </bean> </property> <property name="user" value="${database2.username}"/> <property name="password" value="${database2.password}"/> </bean> <bean id = "jdbcTemplateA" class = "org.springframework.jdbc.core.JdbcTemplate"> <property name = "dataSource" ref="dataSourceA"/> </bean> <bean id = "jdbcTemplateB" class = "org.springframework.jdbc.core.JdbcTemplate"> <property name = "dataSource" ref="dataSourceB"/> </bean> <!-- 事务切面配置 --> <aop:config> <aop:pointcut id="pointCut" expression="execution(* com.spring.jtaTransactionManager..*.*(..))"/><!-- 包及其子包下的所有方法 --> <aop:advisor pointcut-ref="pointCut" advice-ref="txAdvice"/> </aop:config> <!-- 通知配置 --> <tx:advice id="txAdvice" transaction-manager="jtaTransactionManager"> <tx:attributes> <tx:method name="delete*" rollback-for="Exception"/> <tx:method name="save*" rollback-for="Exception"/> <tx:method name="update*" rollback-for="Exception"/> <tx:method name="find*" read-only="true" rollback-for="Exception"/> </tx:attributes> </tx:advice> </beans>后续还会,补充对应的其他hibernate的JtaTransactionManager处理方式