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spring整合atomikos實現(xiàn)分布式事務(wù)的方法示例

更新時間：2019年05月21日 09:26:07 作者：胖子k

本文整合了一個spring和atomikos的demo,并且通過案例演示說明atomikos的作用，具有一定的參考價值，感興趣的小伙伴們可以參考一下

前言

Atomikos 是一個為Java平臺提供增值服務(wù)的并且開源類事務(wù)管理器，主要用于處理跨數(shù)據(jù)庫事務(wù)，比如某個指令在A庫和B庫都有寫操作，業(yè)務(wù)上要求A庫和B庫的寫操作要具有原子性，這時候就可以用到atomikos。筆者這里整合了一個spring和atomikos的demo,并且通過案例演示說明atomikos的作用。

準(zhǔn)備工作

開發(fā)工具：idea

數(shù)據(jù)庫：mysql , oracle

正文

源碼地址： https://github.com/qw870602/atomikos

演示原理：通過在兩個庫的寫操作之間人為制造異常來觀察數(shù)據(jù)庫是否回滾

演示步驟：1.正常寫操作，觀察數(shù)據(jù)庫值的變化情況

2.在寫操作語句之間制造異常，觀察數(shù)據(jù)庫值的變化情況

項目結(jié)構(gòu)

從web.xml中可以知道，容器只加載了appliactionContext.xml，剩下的配置文件除了database.properties外都是無用文件，所以大家如果要在項目中配置的話，僅需要把appliactionContext.xml中關(guān)于atomikos的部分新增到自己項目中就OK了

appliactionContext.xml

<?xml version="1.0" encoding="UTF-8"?>
<beans
    xmlns="http://www.springframework.org/schema/beans"
    xmlns:tx="http://www.springframework.org/schema/tx"
    xmlns:p="http://www.springframework.org/schema/p"
    xmlns:aop="http://www.springframework.org/schema/aop"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xmlns:mvc="http://www.springframework.org/schema/mvc"
    xmlns:context="http://www.springframework.org/schema/context"
    xsi:schemaLocation="http://www.springframework.org/schema/beans
  http://www.springframework.org/schema/beans/spring-beans-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/context
  http://www.springframework.org/schema/context/spring-context-3.0.xsd
  http://www.springframework.org/schema/mvc
  http://www.springframework.org/schema/mvc/spring-mvc-3.0.xsd">
  <!-- 引入數(shù)據(jù)源信息的properties屬性文件 -->
  <context:property-placeholder location="classpath:database.properties" />
  <!-- XA方式 -->
  <!-- MYSQL數(shù)據(jù)庫配置 -->
  <bean id="mysqlDataSource" class="com.atomikos.jdbc.AtomikosDataSourceBean" destroy-method="close">
    <property name="uniqueResourceName" value="dataSource1"/>
    <property name="xaDataSourceClassName" value="com.mysql.jdbc.jdbc2.optional.MysqlXADataSource"/>
    <property name="xaProperties">
      <props>
        <prop key="URL">${mysql.qa.db.url}</prop>
        <prop key="user">${mysql.qa.db.user}</prop>
        <prop key="password">${mysql.qa.db.password}</prop>
      </props>
    </property>
    <property name="minPoolSize" value="10" />
    <property name="maxPoolSize" value="100" />
    <property name="borrowConnectionTimeout" value="30" />
    <property name="maintenanceInterval" value="60" />
  </bean>

  <!-- ORACLE數(shù)據(jù)庫配置 -->
  <bean id="oracleDataSource" class="com.atomikos.jdbc.AtomikosDataSourceBean" destroy-method="close">
    <property name="uniqueResourceName" value="dataSource2"/>
    <property name="xaDataSourceClassName" value="oracle.jdbc.xa.client.OracleXADataSource" />
    <property name="xaProperties">
      <props>
        <prop key="URL">${oracle.qa.db.url}</prop>
        <prop key="user">${oracle.qa.db.user}</prop>
        <prop key="password">${oracle.qa.db.password}</prop>
      </props>
    </property>
    <property name="minPoolSize" value="10" />
    <property name="maxPoolSize" value="100" />
    <property name="borrowConnectionTimeout" value="30" />
    <property name="maintenanceInterval" value="60" />
  </bean>

  <bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
    <!--<property name="configLocation" value="classpath:mybatis-config-mysql.xml" />-->
    <property name="dataSource" ref="mysqlDataSource" />
    <property name="mapperLocations" >
      <list>
        <value>classpath*:/dao/*.xml</value>
      </list>
    </property>
  </bean>
  <bean id="sqlSessionFactoryOracle" class="org.mybatis.spring.SqlSessionFactoryBean">
    <!--<property name="configLocation" value="classpath:mybatis-config.xml" />-->
    <property name="dataSource" ref="oracleDataSource" />
    <property name="mapperLocations" >
      <list>
        <value>classpath*:/daodev/*.xml</value>
      </list>
    </property>
  </bean>

  <!-- MyBatis為不同的mapper注入sqlSessionFactory -->
  <bean id="mysqlTransactionTestDao" class="org.mybatis.spring.mapper.MapperFactoryBean">
    <property name="sqlSessionFactory" ref="sqlSessionFactory" />
    <property name="mapperInterface" value="com.xy.dao.MysqlTransactionTestDao" />
  </bean>
  <bean id="transactionTestDao" class="org.mybatis.spring.mapper.MapperFactoryBean">
    <property name="sqlSessionFactory" ref="sqlSessionFactoryOracle" />
    <property name="mapperInterface" value="com.xy.dao.TransactionTestDao" />
  </bean>

  <!-- 分布式事務(wù) -->
  <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>
  <bean id="transactionManager" class="org.springframework.transaction.jta.JtaTransactionManager">
    <property name="transactionManager" ref="atomikosTransactionManager"/>
    <property name="userTransaction" ref="atomikosUserTransaction"/>
  </bean>

  <tx:annotation-driven transaction-manager="transactionManager"/>
  <context:annotation-config/>
  <!--&lt;!&ndash; 自動掃描controller包下的所有類，如果@Controller注入為bean &ndash;&gt;-->
  <!--&lt;!&ndash;事務(wù)管理層&ndash;&gt;-->
  <context:component-scan base-package="com.xy" />

  <!-- 注冊攔截器 -->
  <!--<mvc:interceptors>
    <bean class="com.springmybatis.system.interceptor.MyInterceptor" />
  </mvc:interceptors>-->
</beans>

適用JUnit4進行單元測試

package com.xy.controller;

import com.xy.daodev.TransactionTestService;
import org.junit.Test;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.test.context.ContextConfiguration;
import org.springframework.test.context.junit4.AbstractJUnit4SpringContextTests;

@ContextConfiguration(locations = {"classpath:applicationContext.xml"})
public class TransactionTestMain extends AbstractJUnit4SpringContextTests {
  @Autowired
 private TransactionTestService transactionTestService;
 
 /**
 * 在同一事務(wù)有多個數(shù)據(jù)源
 */
 @Test
 public void multipleDataSource2() {
 transactionTestService.updateMultipleDataSource("1","1", 100L,"1.6");
 }
}

業(yè)務(wù)實現(xiàn)，當(dāng)前沒有異常操作

@Service
public class TransactionTestServiceImpl implements TransactionTestService {
  @Autowired
 @Qualifier("mysqlTransactionTestDao")
 private MysqlTransactionTestDao mysqlTransactionTestDao;
 
 @Autowired
 @Qualifier("transactionTestDao")
 private TransactionTestDao transactionTestDao;
 
 /**
 * 在同一事務(wù)有多個數(shù)據(jù)源
 */
 @Override
 @Transactional
 public void updateMultipleDataSource(String deUserId, String inUserid, long money,String str) {
 // 賬戶1轉(zhuǎn)出操作
 mysqlTransactionTestDao.decreaseMoney(deUserId, money);
  //Integer.parseInt(str);
 // 賬戶2轉(zhuǎn)入操作
 transactionTestDao.increaseMoney(inUserid, money);
 
 } 

}

mysql模擬金額轉(zhuǎn)出，oracle模擬金額轉(zhuǎn)入

<update id="decreaseMoney" parameterType="java.util.Map">
  UPDATE fx1 SET amount=amount - #{1,jdbcType=BIGINT} WHERE id=#{0,jdbcType=VARCHAR}
</update>

<update id="increaseMoney">
  UPDATE fx1 SET amount=amount + #{1,jdbcType=BIGINT} WHERE id=#{0,jdbcType=VARCHAR}
</update>

mysql初始金額

oracle初始金額

執(zhí)行正常操作

mysql當(dāng)前金額

oracle當(dāng)前金額

將被屏蔽的制造異常的代碼打開

public void updateMultipleDataSource(String deUserId, String inUserid, long money,String str) {
 // 賬戶1轉(zhuǎn)出操作
 mysqlTransactionTestDao.decreaseMoney(deUserId, money);
  Integer.parseInt("skg");
 // 賬戶2轉(zhuǎn)入操作
 transactionTestDao.increaseMoney(inUserid, money);
}

發(fā)現(xiàn)mysql和oracle的當(dāng)前金額都沒有變化，說明事務(wù)回滾成功，查看日志