Atomikos分两个:一个是开源的TransactionEssentials,一个是商业的ExtremeTransactions。


       TransactionEssentials的主要特征:JTA/XA 事务管理 —— 提供事务管理和连接池不需要应用服务器支持分布式事务(例如tomcat) 。TransactionEssentials可以在任何Java EE应用服务器中运行,也就是不依赖于任何应用服务器开源。TransactionEssentials是遵守Apache版本2许可的开源软件专注于JDBC/JMS —— 支持所有XA资源。


        Atomikos数据源配置方法有三种分别有:SimpleDataSourceBean、AtomikosDataSourceBean、AtomikosNonXADataSourceBean可任选一种。但是,使用atomikos时不能使用不支持jta的连接池,如c3p0。同样,如果使用jotm,也必须使用StandardXAPoolDataSource数据源配置。

SimpleDataSourceBean表示基础数据库连接配置;

AtomikosDataSourceBean表示必须要用到XA数据库驱动类,可设置连接池(经过测试推荐此方法);

AtomikosNonXADataSourceBean表示必须要用到普通数据库驱动类,可设置连接池;


1、实验环境:

spring
mysql5.1.51(需要版本5.0+)
AtomikosTransactionsEssentials-3.7.0 (详细可参加它的官网:http://www.atomikos.com   )
说明:
1. 测试的数据库需要支持分布式事务,同时JDBC要支持XA连接驱动。本次测试用的mysql5.1是支持事务的,JDBC驱动版本:mysql-connector-java-5.1.7-bin.jar,包含对 XA连接的支持:com.mysql.jdbc.jdbc2.optional.MysqlXAConnection。
2. 附件提供AtomikosTransactionsEssentials 3.7.0 lib包下载:AtomikosTransactionsEssentials-3.7.0-lib.zip官方下载地址:http://www.atomikos.com/Main/TransactionsEssentialsDownloadForm,需要先注册才能下载。


2、创建表:


CREATE DATABASE IF NOT EXISTS testdb_a        DEFAULT CHARACTER SET utf8;    

USE testdb_a;

DROP TABLE IF EXISTS tab_a;

CREATE TABLE tab_a (
id bigint(20) NOT NULL,
name varchar(60) DEFAULT NULL,
address varchar(120) DEFAULT NULL,
PRIMARY KEY (id)
) ENGINE=InnoDB DEFAULT CHARSET=utf8;


CREATE DATABASE IF NOT EXISTS testdb_b DEFAULT CHARACTER SET utf8;

USE testdb_b;

DROP TABLE IF EXISTS tab_b;

CREATE TABLE tab_b (
id bigint(20) NOT NULL,
name varchar(60) DEFAULT NULL,
address varchar(120) DEFAULT NULL,
PRIMARY KEY (id)
) ENGINE=InnoDB DEFAULT CHARSET=utf8;

3、配置文件:


<?xml version="1.0" encoding="UTF-8"?> 
<!-- 局部单元测试使用,不正式发布,不要删除 -->
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:jee="http://www.springframework.org/schema/jee"
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-2.0.xsd
http://www.springframework.org/schema/jee http://www.springframework.org/schema/jee/spring-jee-2.0.xsd
http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-2.0.xsd
http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-2.0.xsd">

<!--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:jdbc.properties</value>
</list>
</property>
</bean>
<!-- 数据源A -->
<bean id="dataSourceA" class="com.atomikos.jdbc.SimpleDataSourceBean" init-method="init" destroy-method="close">
<property name="uniqueResourceName">
<value>mysql/db_a</value>
</property>
<property name="xaDataSourceClassName">
<value>com.mysql.jdbc.jdbc2.optional.MysqlXADataSource</value>
</property>
<property name="xaDataSourceProperties">
<value>URL=${jdbc.url};user=${jdbc.username};password=${jdbc.password}</value>
</property>
<property name="exclusiveConnectionMode">
<value>true</value>
</property>
<property name="connectionPoolSize">
<value>3</value>
</property>
<property name="validatingQuery">
<value>SELECT 1</value>
</property>
</bean>
<!-- 数据源B -->
<bean id="dataSourceB" class="com.atomikos.jdbc.SimpleDataSourceBean" init-method="init" destroy-method="close">
<property name="uniqueResourceName">
<value>mysql/db_b</value>
</property>
<property name="xaDataSourceClassName">
<value>com.mysql.jdbc.jdbc2.optional.MysqlXADataSource</value>
</property>
<property name="xaDataSourceProperties">
<value>URL=${jdbc2.url};user=${jdbc2.username};password=${jdbc2.password}</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="atomikosTransactionManager" class="com.atomikos.icatch.jta.UserTransactionManager"
init-method="init" destroy-method="close">
<property name="forceShutdown" value="true"/>
</bean>

<bean id="atomikosUserTransaction" class="com.atomikos.icatch.jta.UserTransactionImp">
<property name="transactionTimeout" value="300"/>
</bean>
<!-- JTA事务管理器 -->
<bean id="springTransactionManager" class="org.springframework.transaction.jta.JtaTransactionManager">
<property name="transactionManager" ref="atomikosTransactionManager"/>
<property name="userTransaction" ref="atomikosUserTransaction"/>
</bean>


<!-- 事务切面配置 -->
<aop:config>
<aop:pointcut id="serviceOperation"
expression="execution(* *..service*..*(..))"/>
<aop:advisor pointcut-ref="serviceOperation"
advice-ref="txAdvice"/>
</aop:config>
<!-- 通知配置 -->
<tx:advice id="txAdvice" transaction-manager="springTransactionManager">
<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="*" read-only="true" rollback-for="Exception"/>
</tx:attributes>
</tx:advice>

<!--根据dataSourceA和sql-map-config_A.xml创建一个SqlMapClientA-->
<bean id="sqlMapClientA"
class="org.springframework.orm.ibatis.SqlMapClientFactoryBean">
<property name="dataSource">
<ref local="dataSourceA"/>
</property>
<property name="configLocation">
<value>classpath:/sql-map-config_A.xml</value>
</property>
</bean>
<!--根据dataSourceB和sql-map-config_B.xml创建一个SqlMapClientB-->
<bean id="sqlMapClientB"
class="org.springframework.orm.ibatis.SqlMapClientFactoryBean">
<property name="dataSource">
<ref local="dataSourceB"/>
</property>
<property name="configLocation">
<value>classpath:/sql-map-config_B.xml</value>
</property>
</bean>
<!--根据sqlMapClientA创建一个SqlMapClientTemplate的模版类实例sqlMapClientTemplateA-->
<bean id="sqlMapClientTemplateA"
class="org.springframework.orm.ibatis.SqlMapClientTemplate">
<property name="sqlMapClient" ref="sqlMapClientA"/>
</bean>
<!--根据sqlMapClientB创建一个SqlMapClientTemplate的模版类实例sqlMapClientTemplateB-->
<bean id="sqlMapClientTemplateB"
class="org.springframework.orm.ibatis.SqlMapClientTemplate">
<property name="sqlMapClient" ref="sqlMapClientB"/>
</bean>

<!-- 配置DAO,并注入所使用的sqlMapClientTemplate实例 -->
<bean id="tabADAO" class="com.lavasoft.stu.atomikos.dao.impl.TabADAOImpl">
<property name="sqlMapClientTemplate" ref="sqlMapClientTemplateA"/>
</bean>
<bean id="tabBDAO" class="com.lavasoft.stu.atomikos.dao.impl.TabBDAOImpl">
<property name="sqlMapClientTemplate" ref="sqlMapClientTemplateB"/>
</bean>

<!-- Service配置,注入DAO -->
<bean id="stuJotmService" class="com.lavasoft.stu.atomikos.service.StuJotmServiceImpl">
<property name="tabADAO" ref="tabADAO"/>
<property name="tabBDAO" ref="tabBDAO"/>
</bean>
</beans>