用DefaultAdvisorAutoProxyCreator自动创建事务代

用DefaultAdvisorAutoProxyCreator自动创建事务代理

2008年04月25日 星期五 09:36

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Spring编程式事务管理
用DefaultAdvisorAutoProxyCreator自动创建事务代理
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   drop TABLE sampledb.orders;
CREATE TABLE sampledb.orders(
`ID` BIGINT NOT NULL,
`ORDER_NUMBER` VARCHAR(15),
`CUSTOMER_ID` BIGINT,
PRIMARY KEY(`ID`)
)
ENGINE = InnoDB;

drop TABLE `sampledb`.`customers`;
CREATE TABLE `sampledb`.`customers` (
   `ID` BIGINT NOT NULL,
`NAME` VARCHAR(45),
PRIMARY KEY(`ID`)
)
ENGINE = InnoDB;


alter table sampledb.orders
add constraint constraint_constraint_fk
foreign key (CUSTOMER_ID)
references sampledb.customers(ID);
  
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applicationContext.xml
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<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="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">


    <bean
        >
        <property
            value="com.mysql.jdbc.Driver">
        </property>
        <property
            value="jdbc:mysql://localhost:3306/sampledb">
        </property>
        <property value="root"></property>
    </bean>
    <bean
        >
        <property >
            <ref bean="localMysql" />
        </property>
        <property >
            <props>
                <prop key="hibernate.dialect">
                    org.hibernate.dialect.MySQLDialect
                </prop>
                <prop key="hibernate.hbm2ddl.auto">update</prop>
                <prop key="hibernate.show_sql">true</prop>
            </props>
        </property>
        <property >
            <list>
                <value>db/Orders.hbm.xml</value>
                <value>db/Customers.hbm.xml</value>
            </list>
        </property>
    </bean>

    <!-- 定义事务管理器，使用适用于Hibernte的事务管理器-->
    <bean
        >
        <!-- HibernateTransactionManager bean需要依赖注入一个SessionFactory bean的引用-->
        <property >
            <ref local="localSessionFactory" />
        </property>
    </bean>



    <!--   配置事务拦截器-->
    <bean
        >
        <!--   事务拦截器bean需要依赖注入一个事务管理器 -->
        <property ref="transactionManager" />
        <property >
            <!--   下面定义事务传播属性-->
            <props>
                <prop key="insert*">PROPAGATION_REQUIRED</prop>
                <prop key="find*">PROPAGATION_REQUIRED,readOnly</prop>

            </props>
        </property>
    </bean>
    <!--   定义事务Advisor-->
    <bean
        >
        <!--   定义advisor时，必须传入Interceptor-->
        <property
            ref="transactionInterceptor" />
    </bean>
    <!-- DefaultAdvisorAutoProxyCreator搜索容器中的 advisor,并为每个bean创建代理 -->
    <bean
        />
    <!--定义DAO Bean ,由于BeanNameAutoProxyCreator自动生成事务代理-->
    <bean >
        <property >
            <ref local="localSessionFactory" />
        </property>
    </bean>
</beans>



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Demo.java
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package test;
/**
* 用DefaultAdvisorAutoProxyCreator自动创建事务代理
*/
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;
import db.Customers;
public class Demo {
    public static void main(String[] args) {
        ApplicationContext ctx = new ClassPathXmlApplicationContext(
                "applicationContext.xml");
        test.IUserDAO dao = (test.IUserDAO) ctx.getBean("userDAOTarget");
        Customers c = new Customers();
        c.setId(3l);
        c.setName("xxx");
        dao.insertUser(c);
        System.out.println("END");
    }
}



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package db;
import java.util.List;
import javax.sql.DataSource;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.hibernate.LockMode;
import org.springframework.context.ApplicationContext;
import org.springframework.jdbc.datasource.DataSourceUtils;
import org.springframework.orm.hibernate3.support.HibernateDaoSupport;
import org.springframework.transaction.PlatformTransactionManager;
import org.springframework.transaction.support.TransactionTemplate;
import test.IUserDAO;

public class CustomersDAO extends HibernateDaoSupport implements IUserDAO {
    private static final Log log = LogFactory.getLog(CustomersDAO.class);
   
    protected void initDao() {
    // do nothing
    }
    private TransactionTemplate transactionTemplate;
    public void setTransactionManager(
            PlatformTransactionManager transactionManager) {
        this.transactionTemplate = new TransactionTemplate(transactionManager);
    }
    public void insertUser(Customers transientInstance) {
        getHibernateTemplate().saveOrUpdate(transientInstance);
        // 下面两行代码没有实际意义，仅仅为了引发数据库异常
        //DataSource ds = null;
        //DataSourceUtils.getConnection(ds);
    }
    public void save(Customers transientInstance) {
        log.debug("saving Customers instance");
        try {
            getHibernateTemplate().save(transientInstance);
            log.debug("save successful");
        } catch (RuntimeException re) {
            log.error("save failed", re);
            throw re;
        }
    }
}
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package test;

import db.Customers;

public interface IUserDAO {
   
    public void insertUser(Customers c);
   
}

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