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spring3.0+Atomikos 构建jta的分布式事务
摘自: http://gongjiayun.iteye.com/blog/1570111
spring3.0+Atomikos 构建jta的分布式事务
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
首先要下载spring3.0的相关jar包.这个相信对大家说来不难
第二.下载Atomikos,需要以下这些包
atomikos-util-1.0.jarcglib-nodep-2.2.2.jartransactions-3.7.0.jartransactions-api-3.7.0.jartransactions-jdbc-3.7.0.jartransactions-jta-3.7.0.jar
第三.配置
在applicationContext.xml文件当中作如下配置
<?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="http://www.mamicode.com/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="http://www.mamicode.com/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="http://www.mamicode.com/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="http://www.mamicode.com/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>
第四.在src文件夹下面加入一个jta.properties文件.
文件内容如下,这个文件是必须的.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
第五.具体应用
在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(); } } }})
至于怎么与hibernate,mybatis这些整合使用,应该也不难,把数据源换成atomikos数据源应该就差不多了.
如果想了解更多有关atomikos的用法,可以查看这个链接http://www.atomikos.com/Documentation/IntegratingTransactionEssentials
spring3.0+Atomikos 构建jta的分布式事务