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Spring JTA应用JOTM & Atomikos III Atomikos

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  • tom.duan
  • 等级: 初级会员
  • 性别:
  • 文章: 37
  • 积分: 70
  • 来自: 珠海
   发表时间：2007-12-11  
前面简单介绍了JOTM如何在Spring中配置，并如何使用它的JTA事务，本节将介绍Atomikos如何与Spring集成，并使用它的JTA事务。

Atomikos,是一个基于Java的开源事务管理器，提供了事务管理和连接池，不需要应用服务器支持，支持JDBC和JMS事务，能提供对Spring，Hibernate的集成，有兴趣多了解的可以直接参考说明文当，有详细的介绍和使用说明。

Atomikos可以到http://www.atomikos.com/products.html#ate下载,最新版本是3.2.0

首先,仍然是一个相关的配置文件，用来设置相关的环境,打开解压缩后Atomikos根目录,拷贝jta.properties到classpath中，并修改为如下内容
jta.properties 
com.atomikos.icatch.service=com.atomikos.icatch.standalone.UserTransactionServiceFactory
com.atomikos.icatch.console_file_name = tm.out
com.atomikos.icatch.log_base_name = tmlog
com.atomikos.icatch.tm_unique_name = com.atomikos.spring.jdbc.tm
com.atomikos.icatch.console_log_level = INFO


随后，是Spring上下文配置，建立一个名为ApplicationContext-atomikos.xml的Spring上下文

ApplicationContext-atomikos.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"
    xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-2.0.xsd">
	<!-- XA Datasource -->
	<bean id="datasource1" class="com.atomikos.jdbc.SimpleDataSourceBean" init-method="init" destroy-method="close">   
		<property name="uniqueResourceName">   
			<value>mysql/main</value>   
		</property>   
		<property name="xaDataSourceClassName">   
			<value>com.mysql.jdbc.jdbc2.optional.MysqlXADataSource</value>   
		</property>   
		<property name="xaDataSourceProperties">   
			<value>URL=jdbc:mysql://localhost:3306/test;user=root;password=admin</value>   
		</property>   
		<property name="exclusiveConnectionMode">   
			<value>true</value>   
		</property>   
		<property name="connectionPoolSize">   
			<value>3</value>   
		</property>   
		<property name="validatingQuery">   
			<value>SELECT 1</value>   
		</property>   
	</bean>
	
	<bean id="datasource2" class="com.atomikos.jdbc.SimpleDataSourceBean" init-method="init" destroy-method="close">   
		<property name="uniqueResourceName">   
			<value>mysql/news</value>
		</property>   
		<property name="xaDataSourceClassName">   
			<value>com.mysql.jdbc.jdbc2.optional.MysqlXADataSource</value>   
		</property>
		<property name="xaDataSourceProperties">   
			<value>URL=jdbc:mysql://localhost:3306/test2;user=root;password=admin</value>   
		</property>   
		<property name="exclusiveConnectionMode">   
			<value>true</value>   
		</property>   
		<property name="connectionPoolSize">   
			<value>3</value>   
		</property>   
		<property name="validatingQuery">   
			<value>SELECT 1</value>   
		</property>   
	</bean>
	
	<bean id="template1" class="org.springframework.jdbc.core.JdbcTemplate">
		<property name="dataSource" ref="datasource1" />
	</bean>
	
	<bean id="template2" class="org.springframework.jdbc.core.JdbcTemplate">
		<property name="dataSource" ref="datasource2" />
	</bean>
		
	<bean id="atomikosTransactionManager" class="com.atomikos.icatch.jta.UserTransactionManager" init-method="init" destroy-method="close">
		<property name="forceShutdown"><value>true</value></property>
	</bean>
	
	<bean id="atomikosUserTransaction" class="com.atomikos.icatch.jta.UserTransactionImp">
		<property name="transactionTimeout" value="300"/> 
	</bean>

	<bean id="springTransactionManager" class="org.springframework.transaction.jta.JtaTransactionManager">
		<property name="transactionManager"><ref bean="atomikosTransactionManager"  /></property>
		<property name="userTransaction"><ref bean="atomikosUserTransaction"  /></property>
	</bean>
	
	<bean id="dao1" class="com.xa.dao.UserDao1">
		<property name="jdbcTemplate">
			<ref bean="template1"></ref>
		</property>
	</bean>
	
	<bean id="dao2" class="com.xa.dao.UserDao2">
		<property name="jdbcTemplate">
			<ref bean="template2"></ref>
		</property>
	</bean>
	<!-- -->
	<bean id="userServiceTarget" class="com.xa.service.UserServiceImpl">
		<property name="dao1" ref="dao1"/>
		<property name="dao2" ref="dao2"/>
	</bean>
	
	<bean id="userTest" class="org.springframework.transaction.interceptor.TransactionProxyFactoryBean">    
		<property name="transactionManager">
			<ref bean="springTransactionManager"/>
		</property>    
		<property name="target">
			<ref bean="userServiceTarget"/>
		</property>
		<property name="transactionAttributes">        
			<props>
				<prop key="insert*">PROPAGATION_REQUIRED,-Exception</prop>            
			</props>
		</property>
	</bean>
</beans>


看上下文中的代码，很大部分和JOTM的相似，atomikos使用com.atomikos.jdbc.SimpleDataSourceBean类来创建datasource bean，这里需要特别注意 
<property name="uniqueResourceName">   
	<value>mysql/main</value>   
</property>  



<property name="uniqueResourceName">   
	<value>mysql/news</value>
</property>

上面的代码为每个Datasource配置了一个唯一的名称，名称不允许相同，否则将会使用同一个datasource，而不会出现异常。

另外在配置文件中定义了Atomikos的事务管理器，并在Spring的JtaTransactionManager中引用 
<bean id="atomikosTransactionManager" class="com.atomikos.icatch.jta.UserTransactionManager" init-method="init" destroy-method="close">
		<property name="forceShutdown"><value>true</value></property>
	</bean>
	
	<bean id="atomikosUserTransaction" class="com.atomikos.icatch.jta.UserTransactionImp">
		<property name="transactionTimeout" value="300"/> 
	</bean>

	<bean id="springTransactionManager" class="org.springframework.transaction.jta.JtaTransactionManager">
		<property name="transactionManager"><ref bean="atomikosTransactionManager"  /></property>
		<property name="userTransaction"><ref bean="atomikosUserTransaction"  /></property>
	</bean>


其它的代码没什么特别，和JOTM配置基本相同，JdbcTemplate，DAO，Service，事务代理等等....

仍然使用TestXa.java，修改成引用ApplicationContext-atomikos.xml的上下文配置 
protected String[] getConfigLocations() {
	//return new String[] { "classpath:ApplicationContext-jotm.xml" };
	return new String[] { "classpath:ApplicationContext-atomikos.xml" };
}


运行test，然后查看数据库状态，
然后修改方法参数使其不违反数据库约束，再运行Test观察数据库 ：）。
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  • liuzhengd9
  • 等级: 初级会员
  • 性别:
  • 文章: 8
  • 积分: 0
  • 来自: 北京
   发表时间：2008-07-02  
我按照你的配置了一些，我换成了hibernate3.2.6，为什么报下面这个错误：
2008-07-02 14:22:24,343 DEBUG [main] (BatchingBatcher.java:44) - Executing batch size: 10
2008-07-02 14:22:24,359 DEBUG [main] (AbstractBatcher.java:374) - about to close PreparedStatement (open PreparedStatements: 1, globally: 1)
2008-07-02 14:22:24,359 DEBUG [main] (AbstractPlatformTransactionManager.java:893) - Triggering beforeCompletion synchronization
2008-07-02 14:22:24,359 DEBUG [main] (TransactionSynchronizationManager.java:199) - Removed value [org.springframework.orm.hibernate3.SessionHolder@b20352] for key [org.hibernate.impl.SessionFactoryImpl@578073] from thread [main]
2008-07-02 14:22:24,359 DEBUG [main] (AbstractPlatformTransactionManager.java:848) - Initiating transaction rollback after commit exception
java.lang.IllegalArgumentException: null source
at java.util.EventObject.<init>(Unknown Source)
at javax.sql.StatementEvent.<init>(Unknown Source)
at com.mysql.jdbc.jdbc2.optional.JDBC4PreparedStatementWrapper.close(JDBC4PreparedStatementWrapper.java:70)
at org.hibernate.jdbc.AbstractBatcher.closePreparedStatement(AbstractBatcher.java:534)
at org.hibernate.jdbc.AbstractBatcher.closeStatement(AbstractBatcher.java:269)
at org.hibernate.jdbc.AbstractBatcher.executeBatch(AbstractBatcher.java:249)
at org.hibernate.engine.ActionQueue.executeActions(ActionQueue.java:266)
at org.hibernate.engine.ActionQueue.executeActions(ActionQueue.java:167)
at org.hibernate.event.def.AbstractFlushingEventListener.performExecutions(AbstractFlushingEventListener.java:298)
at org.hibernate.event.def.DefaultFlushEventListener.onFlush(DefaultFlushEventListener.java:27)
at org.hibernate.impl.SessionImpl.flush(SessionImpl.java:1000)
at org.springframework.orm.hibernate3.SpringSessionSynchronization.beforeCommit(SpringSessionSynchronization.java:135)
at org.springframework.transaction.support.TransactionSynchronizationUtils.triggerBeforeCommit(TransactionSynchronizationUtils.java:72)
at org.springframework.transaction.support.AbstractPlatformTransactionManager.triggerBeforeCommit(AbstractPlatformTransactionManager.java:882)
at org.springframework.transaction.support.AbstractPlatformTransactionManager.processCommit(AbstractPlatformTransactionManager.java:692)
at org.springframework.transaction.support.AbstractPlatformTransactionManager.commit(AbstractPlatformTransactionManager.java:678)
at org.springframework.transaction.interceptor.TransactionAspectSupport.commitTransactionAfterReturning(TransactionAspectSupport.java:321)
at org.springframework.transaction.interceptor.TransactionInterceptor.invoke(TransactionInterceptor.java:116)
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:171)
at org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:204)
at $Proxy7.addMySpringObject(Unknown Source)
at myspring.service.impl.MySpringServiceTest.main(MySpringServiceTest.java:26)
2008-07-02 14:22:24,484 DEBUG [main] (AbstractPlatformTransactionManager.java:922) - Triggering afterCompletion synchronization
2008-07-02 14:22:24,484 DEBUG [main] (SessionFactoryUtils.java:774) - Closing Hibernate Session
2008-07-02 14:22:24,484 DEBUG [main] (ConnectionManager.java:441) - releasing JDBC connection [ (open PreparedStatements: 0, globally: 0) (open ResultSets: 0, globally: 0)]
Exception in thread "main" java.lang.IllegalArgumentException: null source
at java.util.EventObject.<init>(Unknown Source)
at javax.sql.StatementEvent.<init>(Unknown Source)
at com.mysql.jdbc.jdbc2.optional.JDBC4PreparedStatementWrapper.close(JDBC4PreparedStatementWrapper.java:70)
at org.hibernate.jdbc.AbstractBatcher.closePreparedStatement(AbstractBatcher.java:534)
at org.hibernate.jdbc.AbstractBatcher.closeStatement(AbstractBatcher.java:269)
at org.hibernate.jdbc.AbstractBatcher.executeBatch(AbstractBatcher.java:249)
at org.hibernate.engine.ActionQueue.executeActions(ActionQueue.java:266)2008-07-02 14:22:24,531 DEBUG [main] (ConnectionManager.java:302) - transaction completed on session with on_close connection release mode; be sure to close the session to release JDBC resources!
2008-07-02 14:22:24,531 DEBUG [main] (TransactionSynchronizationManager.java:282) - Clearing transaction synchronization

at org.hibernate.engine.ActionQueue.executeActions(ActionQueue.java:167)
at org.hibernate.event.def.AbstractFlushingEventListener.performExecutions(AbstractFlushingEventListener.java:298)
at org.hibernate.event.def.DefaultFlushEventListener.onFlush(DefaultFlushEventListener.java:27)
at org.hibernate.impl.SessionImpl.flush(SessionImpl.java:1000)
at org.springframework.orm.hibernate3.SpringSessionSynchronization.beforeCommit(SpringSessionSynchronization.java:135)
at org.springframework.transaction.support.TransactionSynchronizationUtils.triggerBeforeCommit(TransactionSynchronizationUtils.java:72)
at org.springframework.transaction.support.AbstractPlatformTransactionManager.triggerBeforeCommit(AbstractPlatformTransactionManager.java:882)
at org.springframework.transaction.support.AbstractPlatformTransactionManager.processCommit(AbstractPlatformTransactionManager.java:692)
at org.springframework.transaction.support.AbstractPlatformTransactionManager.commit(AbstractPlatformTransactionManager.java:678)
at org.springframework.transaction.interceptor.TransactionAspectSupport.commitTransactionAfterReturning(TransactionAspectSupport.java:321)
at org.springframework.transaction.interceptor.TransactionInterceptor.invoke(TransactionInterceptor.java:116)
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:171)
at org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:204)
at $Proxy7.addMySpringObject(Unknown Source)
at myspring.service.impl.MySpringServiceTest.main(MySpringServiceTest.java:26)
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