Spring 3.0 + Atomikos构建jta分布式事务

Spring3.0已经不再支持jtom了，不过我们可以用第三方开源软件atomikos(http://www.atomikos.com/)来实现。Atomikos是目前在分布式事务管理中做得相当不错的开源软件。有10年以上的经验,Atomikos保障您的关键事务和 防止昂贵的数据丢失在发生系统故障或事故中。Atomikos支持XA(全局事务)和NON-XA(非全局事务)，NON-XA效率高于XA.本文主要是讲XA事件，因为要在不同的数据库中操作多张表。

    接下来说一下怎么和spring3.0结合使用。

第一步：配置ApplicationContext.xml文件如下：

<?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:jee="http://www.springframework.org/schema/jee"    xmlns:tx="http://www.springframework.org/schema/tx" 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/jee http://www.springframework.org/schema/jee/spring-jee-3.0.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.0.xsd"    default-lazy-init="true">    <!-- spring atomikos 配置　开始-->    <!-- mysql数据源 -->    <bean id="mysqlDS" class="com.atomikos.jdbc.AtomikosDataSourceBean"        init-method="init" destroy-method="close">        <description>mysql xa datasource</description>        <property name="uniqueResourceName">            <value>mysql_ds</value>        </property>        <property name="xaDataSourceClassName" value="com.mysql.jdbc.jdbc2.optional.MysqlXADataSource" />        <property name="xaProperties">            <props>                <prop key="user">userName</prop>                <prop key="password">password</prop>                <prop key="URL">jdbc\:mysql\://127.0.0.1\:3306/dataBaseName?autoReconnect\=true</prop>            </props>        </property>        <!-- 连接池里面连接的个数? -->         <property name="poolSize" value="3"/>     </bean>    <!-- oracle数据源 -->    <bean id="oracleDS" class="com.atomikos.jdbc.AtomikosDataSourceBean"        init-method="init" destroy-method="close">        <description>oracle xa datasource</description>        <property name="uniqueResourceName">            <value>oracle_ds</value>        </property>        <property name="xaDataSourceClassName">            <value>oracle.jdbc.xa.client.OracleXADataSource</value>        </property>        <property name="xaProperties">            <props>                <prop key="user">userName</prop>                <prop key="password">password</prop>                <prop key="URL">jdbc\:oracle\:thin\:@127.0.0.1\:1521\:dataBaseName</prop>            </props>        </property>        <!-- 连接池里面连接的个数? -->         <property name="poolSize" value="3"/>    </bean>    <!-- atomikos事务管理器 -->    <bean id="atomikosTransactionManager" class="com.atomikos.icatch.jta.UserTransactionManager"        init-method="init" destroy-method="close">        <description>UserTransactionManager</description>        <property name="forceShutdown">            <value>true</value>        </property>    </bean>    <bean id="atomikosUserTransaction" class="com.atomikos.icatch.jta.UserTransactionImp">        <property name="transactionTimeout" value="300" />    </bean>    <!-- spring 事务管理器 -->    <bean id="springTransactionManager"        class="org.springframework.transaction.jta.JtaTransactionManager">        <property name="transactionManager">            <ref bean="atomikosTransactionManager" />        </property>        <property name="userTransaction">            <ref bean="atomikosUserTransaction" />        </property>    </bean>    <!-- spring　事务模板 我在项目当中用的是编程式事务-->    <bean id="transactionTemplate"        class="org.springframework.transaction.support.TransactionTemplate">        <property name="transactionManager">            <ref bean="springTransactionManager" />        </property>    </bean>    <bean id="simpleJdbcTemplate" class="org.springframework.jdbc.core.simple.SimpleJdbcTemplate">        <constructor-arg>            <ref bean="mysqlDS" />        </constructor-arg>    </bean>        <bean id="simplejdbcTemplateOra" class="org.springframework.jdbc.core.simple.SimpleJdbcTemplate">        <constructor-arg>            <ref bean="oracleDS" />        </constructor-arg>    </bean>    <!-- spring atomikos 配置　结束-->        <!-- 接下来就是具体的Dao的配置 -->    <bean id="oracleJtaDao" class="com.dao.TerminalOracleJtaDao">        <property name="simplejdbcTemplateOra">            <ref bean="simplejdbcTemplateOra" />        </property>        <property name="transactionTemplate">            <ref bean="transactionTemplate" />        </property>    </bean>    <bean id="myaqlJtaDao" class="com.dao.TerminalMyaqlJtaDao">        <property name="simpleJdbcTemplate">            <ref bean="simpleJdbcTemplate" />        </property>        <property name="transactionTemplate">            <ref bean="transactionTemplate" />        </property>    </bean></beans>

第二步：配置jta.properties文件，此文件是必须的。主是是设置atomikos启动的一些参数，比如日志的输出级别，日志文件的名称等

# SAMPLE PROPERTIES FILE FOR THE TRANSACTION SERVICE# THIS FILE ILLUSTRATES THE DIFFERENT SETTINGS FOR THE TRANSACTION MANAGER# UNCOMMENT THE ASSIGNMENTS TO OVERRIDE DEFAULT VALUES;# Required: factory implementation class of the transaction core.# NOTE: there is no default for this, so it MUST be specified! # com.atomikos.icatch.service=com.atomikos.icatch.standalone.UserTransactionServiceFactory        # Set base name of file where messages are output # (also known as the 'console file').#com.atomikos.icatch.console_file_name = tm.out# Size limit (in bytes) for the console file;# negative means unlimited.## com.atomikos.icatch.console_file_limit=-1# For size-limited console files, this option# specifies a number of rotating files to # maintain.## com.atomikos.icatch.console_file_count=1# Set the number of log writes between checkpoints## com.atomikos.icatch.checkpoint_interval=500# Set output directory where console file and other files are to be put# make sure this directory exists!## com.atomikos.icatch.output_dir = ./# Set directory of log files; make sure this directory exists!## com.atomikos.icatch.log_base_dir = ./# Set base name of log file# this name will be  used as the first part of # the system-generated log file name#com.atomikos.icatch.log_base_name = tmlog# Set the max number of active local transactions # or -1 for unlimited.## com.atomikos.icatch.max_actives = 50# Set the default timeout (in milliseconds) for local transactions## com.atomikos.icatch.default_jta_timeout = 10000# Set the max timeout (in milliseconds) for local transactions## com.atomikos.icatch.max_timeout = 300000# The globally unique name of this transaction manager process# override this value with a globally unique name#com.atomikos.icatch.tm_unique_name = tm    # Do we want to use parallel subtransactions? JTA's default# is NO for J2EE compatibility## com.atomikos.icatch.serial_jta_transactions=true                    # If you want to do explicit resource registration then# you need to set this value to false.## com.atomikos.icatch.automatic_resource_registration=true      # Set this to WARN, INFO or DEBUG to control the granularity# of output to the console file.#com.atomikos.icatch.console_log_level=INFO    # Do you want transaction logging to be enabled or not?# If set to false, then no logging overhead will be done# at the risk of losing data after restart or crash.## com.atomikos.icatch.enable_logging=true# Should two-phase commit be done in (multi-)threaded mode or not?# Set this to false if you want commits to be ordered according# to the order in which resources are added to the transaction.## NOTE: threads are reused on JDK 1.5 or higher. # For JDK 1.4, thread reuse is enabled as soon as the # concurrent backport is in the classpath - see # http://mirrors.ibiblio.org/pub/mirrors/maven2/backport-util-concurrent/backport-util-concurrent/## com.atomikos.icatch.threaded_2pc=false# Should shutdown of the VM trigger shutdown of the transaction core too?## com.atomikos.icatch.force_shutdown_on_vm_exit=false

第三步：需要分布事务处理的地方手动开启事务

TransactionTemplate.getTransactionTemplate().execute(new TransactionCallback(){    public Object doInTransaction(TransactionStatus status){        boolean flag = true;        try {        } catche (Exception e){            flag = false;        } finally {            if (!flag) {                status.status.setRollbackOnly();                }        }    }})

 参考：http://www.tuicool.com/articles/Qziu2i

           http://www.blogjava.net/pdw2009/archive/2008/05/25/202725.html

           http://www.cnblogs.com/davenkin/archive/2013/03/19/java-tranaction-8.html

关于jotm的分布式案例请参见：http://my.oschina.net/xianggao/blog/543790?fromerr=UzOHWQjT