Spring JTA 事务��记

飞熊 — Wed, 09 Dec 2009 09:29:00 GMT

实验一�Q�MySQL 5.0
采用atomikos的jta事务�Q�要感谢 http://andyao.javaeye.com/�Q?

xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 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/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">

init-method="init" destroy-method="close">

mysql/main

com.mysql.jdbc.jdbc2.optional.MysqlXADataSource

URL=jdbc:mysql://localhost:3306/crm?useUnicode=true&characterEncoding=UTF-8;user=root;password=root

true

3

SELECT 1

init-method="init" destroy-method="close">

mysql/news

com.mysql.jdbc.jdbc2.optional.MysqlXADataSource

URL=jdbc:mysql://localhost:3306/crm2?useUnicode=true&characterEncoding=UTF-8;user=root;password=root

true

3

SELECT 1

classpath:SqlMapConfig.xml

classpath:SqlMapConfig2.xml

class="com.atomikos.icatch.admin.imp.LocalLogAdministrator"/>

class="com.atomikos.icatch.config.UserTransactionServiceImp"
init-method="init" destroy-method="shutdownForce">

            com.atomikos.icatch.standalone.UserTransactionServiceFactory

      class="com.atomikos.icatch.jta.UserTransactionManager"
      init-method="init" destroy-method="close"
      depends-on="userTransactionService">




      class="com.atomikos.icatch.jta.UserTransactionImp"
      depends-on="userTransactionService">



      class="org.springframework.transaction.jta.JtaTransactionManager"
      depends-on="userTransactionService">



�q�样是成功的可是切换oracle9i时悲剧发生了
--- Cause: com.atomikos.datasource.ResourceException: resume for XID oracle.jdbc.xa.OracleXid@145f939 raised -3: the XA resource detected an internal error
Caused by: com.ibatis.common.jdbc.exception.NestedSQLException:
--- The error occurred in ibatis/Product1.xml.
--- The error occurred while executing update.
--- Check the          insert into boss_product     (PROD_ID, PARENT_ID, APP_ID, PROD_NAME, PROD_CODE, DEFAULT_VER_PROD_ID, DATA_PATH, GMT_CREATED, GMT_MODIFIED, CREATOR, MODIFIER, IS_DELETED)      values     (seq_boss_product.nextval,      1,      88,      ?,      ?,      10,      'aaa',      sysdate,      sysdate,      'aavv',      'aacb',      'n')        .

官方说oracle�q�接问题哎。。。无语了
换了一�U�JTA事务机制通过JOTM

xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 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/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">






        destroy-method="shutdown">











        destroy-method="shutdown">

classpath:SqlMapConfig_ora1.xml

classpath:SqlMapConfig_ora2.xml

飞熊 2009-12-09 17:29 发表评论

Spring中集成JOTM 配置JTA事务

飞熊 — Wed, 09 Dec 2009 08:41:00 GMT

摘要: 假如业务中要用到多个数据库，我们希望在业务方法中�Q�当�Ҏ��一个数据库的数据表�q�行操作的事务失败�ƈ回退�Q? rollback �Q�，另外某一个数据库的数据表的操作事务也要回退�Q�但应用一般的事务��理达不到这��L��事务��理效果�Q�这��需要实�? JTA 事务��理了�? ... 阅读全文

飞熊 2009-12-09 16:41 发表评论

Spring JTA应用之JOTM配置

飞熊 — Wed, 09 Dec 2009 08:34:00 GMT

原文地址�Q�http://tom-duan.javaeye.com/blog/147594

JOTM(Java Open Transaction Manager)是ObjectWeb的一个开源JTA实现�Q�本�w�也是开源应用程序服务器JOnAS(Java Open Application Server)的一部分�Q��ؓ其提供JTA分布式事务的功能。Spring对JOTM提供了较好的支持�Q�提供了一个org.springframework.transaction.jta.JotmFactoryBean的支持类�Q�在Spring2.0中也包含了JOTM相关的一些library�?

jotm的下载地址为http://jotm.objectweb.org,最新版本�ؓ2.0.10.

下蝲完成后解压羃�Q�然后打开jotm下面conf文�g夹，拯��carol.properties文�g到classpath中，�q�修改这个文件如�?
carol.properties

Java代码

# 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

# 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

上面配置文�g的目的是不��用JNDI的方式来加蝲JOTM的配�|�，当然也可以根据需要选择其它的一些配�|�，例如JTOM所提供的默认配�|��?

然后开始在Spring上下文中配置JOTM�Q�在classpath中徏立一个ApplicationContext-jotm.xml�Q�配�|�如�?

ApplicationContext-jotm.xml

Java代码

"1.0" encoding="UTF-8"?>
"http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-2.0.xsd">
"jotm" class="org.springframework.transaction.jta.JotmFactoryBean"/>
"txManager" class="org.springframework.transaction.jta.JtaTransactionManager">
"userTransaction" ref="jotm" />
"ds1" class="org.enhydra.jdbc.pool.StandardXAPoolDataSource" destroy-method="shutdown">
"dataSource">
class="org.enhydra.jdbc.standard.StandardXADataSource" destroy-method="shutdown">
"transactionManager" ref="jotm" />
"driverName" value="com.mysql.jdbc.Driver" />
"url" value="jdbc:MySQL://localhost:3306/test" />
"user" value="root" />
"password" value="admin" />
"ds2" class="org.enhydra.jdbc.pool.StandardXAPoolDataSource" destroy-method="shutdown">
"dataSource">
class="org.enhydra.jdbc.standard.StandardXADataSource" destroy-method="shutdown">
"transactionManager" ref="jotm" />
"driverName" value="com.mysql.jdbc.Driver" />
"url" value="jdbc:MySQL://localhost:3306/test2" />
"user" value="root" />
"password" value="admin" />
"template1" class="org.springframework.jdbc.core.JdbcTemplate">
"dataSource" ref="ds1" />
"template2" class="org.springframework.jdbc.core.JdbcTemplate">
"dataSource" ref="ds2" />
"dao1" class="com.xa.dao.UserDao1">
"jdbcTemplate">
"template1">
"dao2" class="com.xa.dao.UserDao2">
"jdbcTemplate">
"template2">
"userServiceTarget" class="com.xa.service.UserServiceImpl">
"dao1" ref="dao1"/>
"dao2" ref="dao2"/>
"userTest" class="org.springframework.transaction.interceptor.TransactionProxyFactoryBean">
"transactionManager">
"txManager"/>
"target">
"userServiceTarget"/>
"transactionAttributes">
"insert*">PROPAGATION_REQUIRED,-Exception


























































PROPAGATION_REQUIRED,-Exception

上面是一个完整的Spring上下文配�|�，可以看第一个bean “jotm”，实际上引用了Spring内部所提供的对JOTM支持的工厂类�Q�参考下面的配置代码�D?

Java代码

"jotm" class="org.springframework.transaction.jta.JotmFactoryBean"/>

随后�Q�配�|�了JTA事务��理器，�q�且在管理器中��用上面所配置的jotm�Q�如下面的代�?

Java代码

"txManager" class="org.springframework.transaction.jta.JtaTransactionManager">
"userTransaction" ref="jotm" />

再接下来��是配置多个数据源了�Q��用jotm提供的org.enhydra.jdbc.pool.StandardXAPoolDataSource�c�，�Ҏ��c�d��可以明确地看出它是用以配�|�多个数据源的啦,配置的代码如�?

Java代码

"ds1" class="org.enhydra.jdbc.pool.StandardXAPoolDataSource" destroy-method="shutdown">
"dataSource">
class="org.enhydra.jdbc.standard.StandardXADataSource" destroy-method="shutdown">
"transactionManager" ref="jotm" />
"driverName" value="com.mysql.jdbc.Driver" />
"url" value="jdbc:MySQL://localhost:3306/test" />
"user" value="root" />
"password" value="admin" />
"ds2" class="org.enhydra.jdbc.pool.StandardXAPoolDataSource" destroy-method="shutdown">
"dataSource">
class="org.enhydra.jdbc.standard.StandardXADataSource" destroy-method="shutdown">
"transactionManager" ref="jotm" />
"driverName" value="com.mysql.jdbc.Driver" />
"url" value="jdbc:MySQL://localhost:3306/test2" />
"user" value="root" />
"password" value="admin" />

�q�里配置的两个数据源都连接到本地的mysql�Q�实际上可以�q�接��C��同的db server和不同类型的数据库，已经�l�过��试�Q�这里�ؓ了方便，在本地徏立了两个不同的数据库(test,test2)做测试�?

随后的配�|�基本上和普通的Spring上下文配�|�相同了�Q�根据不同的数据源配�|�两个jdbcTemplate�Q�两个dao分别引用不同的jdbcTemplate, ��两个dao注入到UserService�? 最后将service�U�_��事务��理,�q�在事务代理配置中配�|�回滚规�?意思�ؓ如遇异常�Q�则强制回滚内容。配�|�如下所�C?

Java代码

"transactionAttributes">
"insert*">PROPAGATION_REQUIRED,-Exception



PROPAGATION_REQUIRED,-Exception

�q�样�Q�一个��用JOTM JTA事务的简单应用算大致成型了，最后，写一个JUnit�Q�来��试一下结�?
TestXa.java

Java代码

package com.xa;
import org.springframework.context.ApplicationContext;
import org.springframework.test.AbstractDependencyInjectionSpringContextTests;
import com.xa.service.UserService;
public class TestXa extends AbstractDependencyInjectionSpringContextTests
{
protected String[] getConfigLocations() {
return new String[] { "classpath:ApplicationContext-jotm.xml" };
}
public void testInsertBothDatabase() {
ApplicationContext ctx = this.getApplicationContext();
UserService ut = (UserService)ctx.getBean("userTest");
try {
ut.insertBothDatabase("1", null);
}
catch (Exception e) {
e.printStackTrace();
}
}
}

package com.xa;
import org.springframework.context.ApplicationContext;
import org.springframework.test.AbstractDependencyInjectionSpringContextTests;
import com.xa.service.UserService;
public class TestXa extends AbstractDependencyInjectionSpringContextTests
{
protected String[] getConfigLocations() {
return new String[] { "classpath:ApplicationContext-jotm.xml" };
}
public void testInsertBothDatabase() {
ApplicationContext ctx = this.getApplicationContext();
UserService ut = (UserService)ctx.getBean("userTest");
try {
ut.insertBothDatabase("1", null);
}
catch (Exception e) {
e.printStackTrace();
}
}
}

在test中，调用了UserService的insertBothDatabase�Ҏ��Q�有两个参数�Q�userId和UserName�Q�另外在�Ҏ��的实��C��调用了两个��用不同数据源dao�Q�分别向两个不同的数据库插入输入�Q�而test2数据库的xa_test表中�Q�name字段是不允许为空的，因此�Q�在插入test2数据库时会失�?

�q�行�q�个test�Q�然后察看数据库�l�果�Q�）�Q�test和test2数据库中都没有插入成功，看serviceImpl中的代码可以知道�Q�逻辑上dao1会先于dao2执行�Q�但是由于JTA事务�Q�在dao2插入数据出现异常时整个事务被回滚�Q�由于事务被配置在service层，dao1和dao2都被�U�_��一个事务进行管理，呵呵。修改一下方法的参数�Q�修改�ؓ

Java代码

ut.insertBothDatabase("1", "name1");

ut.insertBothDatabase("1", "name1");

然后再试试test看数据库�l�果�Q�如何？

飞熊 2009-12-09 16:34 发表评论

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Spring JTA 事务���记

Spring中集成JOTM 配置JTA事务

Spring JTA应用之JOTM配置

Spring JTA 事务��记