JTA集成JOTM或Atomikos配置分布式事务(Tomcat应用服务器)

JTA集成JOTM或Atomikos配置分布式事务(Tomcat应用服务器)

分类: Spring--分布式事务 2231人阅读 评论(0) 收藏 举报
spring Spring

一.以下介绍Spring中直接集成JOTM提供JTA事务管理、将JOTM集成到Tomcat中。 
(经过测试JOTM在批量持久化时有BUG需要修改源码GenericPool类解决)! 
参考文章http://mavin.zhou.blog.163.com/blog/static/114522435200971822334475/ 
通过集成JOTM,直接在Spring中使用JTA事务 
JOTM(Java Open Transaction Manager)是ObjectWeb的一个开源JTA实现,它本身也是开源应用程序服务器JOnAS(Java Open Application Server)的一部分,为其提供JTA分布式事务的功能。 
Spring 2.0附带的依赖类库中虽然包含jotm类库,但是并不完整,你可以到http://jotm.objectweb.org下载完全版的JOTM。 
Spring为JOTM提供了一个org.springframework.transaction.jta.JotmFactoryBean支持类,通过该支持类可以方便地创建JOTM本地实例。 
1.将jotm的jar包lib目录下所有jar复制到项目中 
2.将jotm的jar包conf目录下carol.properties文件复制到项目类路径下,修改内容为:

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# do not use CAROL JNDI wrapper
carol.start.jndi = false

# do not start a name server
carol.start.ns = false

# Naming Factory
carol.jndi.java.naming.factory.url.pkgs = org.apache.naming
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3.建立两个数据库,配置两个数据源

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<!-- XAPool配置,内部包含了一个XA数据源,对应相应的数据库 -->
< bean id ="mysqlJta" class ="org.enhydra.jdbc.pool.StandardXAPoolDataSource" destroy-method ="shutdown" >
<!-- 内部XA数据源 -->
< property name ="dataSource" >
< bean class ="org.enhydra.jdbc.standard.StandardXADataSource" destroy-method ="shutdown" >
< property name ="transactionManager" ref ="jotm" />
< property name ="driverName" value ="com.mysql.jdbc.Driver" />
< property name ="url" value ="jdbc:MySQL://localhost:3309/test" />
< property name ="user" value ="root" />
< property name ="password" value ="" />
</ bean >
</ property >
< property name ="user" value ="root" />
< property name ="password" value ="" />
</ bean >

< bean id ="oracleJta" class ="org.enhydra.jdbc.pool.StandardXAPoolDataSource" destroy-method ="shutdown" >
< property name ="dataSource" >
< bean class ="org.enhydra.jdbc.standard.StandardXADataSource" destroy-method ="shutdown" >
< property name ="transactionManager" ref ="jotm" />
< property name ="driverName" value ="oracle.jdbc.driver.OracleDriver" />
< property name ="url" value ="jdbc:oracle:thin:@localhost:1521:orcl" />
< property name ="user" value ="orcl" />
< property name ="password" value ="" />
</ bean >
</ property >
< property name ="user" value ="orcl" />
< property name ="password" value ="" />
</ bean >
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4.事务配置

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<!-- JOTM本地实例 -->
< bean id ="jotm" class ="org.springframework.transaction.jta.JotmFactoryBean" />

<!-- JTA事务管理器 -->
< bean id ="txManager" class ="org.springframework.transaction.jta.JtaTransactionManager" >
< property name ="userTransaction" ref ="jotm" />
</ bean >

<!-- JTA事务传播特性 -->
< tx:advice id ="txAdviceJta" transaction-manager ="txManager" >
< tx:attributes >
< tx:method name ="Jta*" isolation ="DEFAULT" propagation ="REQUIRED" rollback-for ="Exception" />
< tx:method name ="*" read-only ="true" />
</ tx:attributes >
</ tx:advice >

< aop:config >
< aop:advisor pointcut ="execution(* com.xxxxl.service.impl..*(..))" advice-ref ="txAdviceJta" />
</ aop:config >

< bean id ="timerDaoMysql" class ="com.xxxxl.TimerDaoImpl" scope ="prototype" >
< property name ="dataSource" ref ="mysqlJta" ></ property >
</ bean >
< bean id ="timerDaoOracle" class ="com.xxxxl.TimerDaoImpl" scope ="prototype" >
< property name ="dataSource" ref ="oracleJta" ></ property >
</ bean >
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二.以下介绍Spring中直接集成Atomikos提供JTA事务管理、将Atomikos集成到Tomcat中。(经过测试推荐此方法) 
Atomikos Transactions Essentials现在的版本是3.1.7,可以在http://www.atomikos.com/Main/TransactionsEssentialsDownloadForm 下载,在发布包里的examples文件夹下面有些例子,非常实用,我在使用中参考里面的例子很容易配置成功。1.将Atomikos的jar包dist目录下所有jar复制到项目中 
2.建立两个数据库,配置两个数据源。 
Atomikos数据源配置方法有三种分别有:SimpleDataSourceBean,AtomikosDataSourceBean,AtomikosNonXADataSourceBean可任选一种

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Simple表示基础数据库连接配置
< bean id ="oracleJta" class ="com.atomikos.jdbc.SimpleDataSourceBean" init-method ="init" destroy-method ="close" >
< property name ="uniqueResourceName" >
< value > OracleXADataSource </ value > <!-- 任意命名,但必须唯一 -->
</ property >
< property name ="xaDataSourceClassName" >
< value > oracle.jdbc.xa.client.OracleXADataSource </ value >
</ property >
< property name ="xaDataSourceProperties" >
< value > URL=jdbc:oracle:thin:@localhost:1521:orcl;user=orcl;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 >
Atomikos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)
< bean id ="oracleJta" class ="com.atomikos.jdbc.AtomikosDataSourceBean" init-method ="init" destroy-method ="close" lazy-init ="true" >
< property name ="uniqueResourceName" >
< value > OracleXADataSource </ value >
</ property >
< property name ="xaDataSourceClassName" >
< value > oracle.jdbc.xa.client.OracleXADataSource </ value >
</ property >
< property name ="xaProperties" >
< props >
< prop key ="URL" > jdbc:oracle:thin:@localhost:1521:orcl </ prop >
< prop key ="user" > orcl </ prop >
< prop key ="password" ></ prop >
</ props >
</ property >
< property name ="poolSize" >< value > 1 </ value ></ property >
< property name ="maxPoolSize" >< value > 30 </ value ></ property >
</ bean >
AtomikosNon表示必须要用到普通数据库驱动类,可设置连接池
< bean id ="oracleJta" class ="com.atomikos.jdbc.nonxa.AtomikosNonXADataSourceBean" >
< property name ="uniqueResourceName" >< value > OracleXADataSource </ value ></ property >
< property name ="user" >< value > orcl </ value ></ property >
< property name ="password" >< value ></ value ></ property >
< property name ="url" >< value > jdbc:oracle:thin:@192.168.1.217:1521:orcl </ value ></ property >
< property name ="driverClassName" >< value > oracle.jdbc.OracleDriver </ value ></ property >
< property name ="poolSize" >< value > 1 </ value ></ property >
< property name ="borrowConnectionTimeout" >< value > 60 </ value ></ property >
</ bean >
另外一个数据库在这就不在写了,设置同上只是mysql的驱动类名为:xaDataSourceClassName:com.mysql.jdbc.jdbc2.optional.MysqlXADataSource
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3.事务配置

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Atomikos事务方法
< 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 ="240" />
</ bean >
< bean id ="transactionManager"
class
="org.springframework.transaction.jta.JtaTransactionManager" >
< property name ="transactionManager" >
< ref bean ="atomikosTransactionManager" />
</ property >
< property name ="userTransaction" >
< ref bean ="atomikosUserTransaction" />
</ property >
</ bean >
接下来的代码和上例类同就不再写。
另外,在实际项目中,采用了方法二,且使用了HibernateTemplate,这个该怎么配还是怎么配;
在同一台机器上,配置两套及以上的应用,会报异常,这个需要把下载包中的jta.properties包含到Classpath 中,且修改如下
com.atomikos.icatch.service=com.atomikos.icatch.standalone.UserTransactionServiceFactory com.atomikos.icatch.log_base_name = tmlog com.atomikos.icatch.tm_unique_name = com.atomikos.spring.jdbc.tm com.atomikos.icatch.enable_logging=false
com.atomikos.icatch.enable_logging=false 这句话很重要。

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