将Hibernate和iBatis两Orm框架整合，取长补短

由于Hibernate比较适合对数据进行增，删，改的操作，而iBatis适合进行数据 查询，批量操作，而且方便利用DB底层的功能，因此我尝试着持久层同时使用Hibernate和iBatis。
以下是我BaseDaoImpl的代码：


代码

package mypack.dao;

import org.hibernate.SessionFactory;
import org.springframework.orm.hibernate3.HibernateCallback;
import org.springframework.orm.hibernate3.HibernateTemplate;
import org.springframework.orm.ibatis.SqlMapClientTemplate;

import com.ibatis.sqlmap.client.SqlMapClient;

public abstract class BaseDaoImpl implements BaseDAO
{
//iBatis的Template
private SqlMapClientTemplate sqlMapClientTemplate ;
//Hibernate的Template
    private HibernateTemplate hibernateTemplate ;
   
    //设置Hibernate
public final void setSessionFactory(SessionFactory sessionFactory) {
    if(this.hibernateTemplate == null){
    this.hibernateTemplate = new HibernateTemplate(sessionFactory);
    }else{
    this.hibernateTemplate.setSessionFactory(sessionFactory);
    }
}
//设置ibatis
public final void setSqlMapClient(SqlMapClient sqlMapClient) {
if(this.sqlMapClientTemplate == null){
this.sqlMapClientTemplate = new SqlMapClientTemplate();
}
this.sqlMapClientTemplate.setSqlMapClient(sqlMapClient);
}
   
//获取Hibernate的模板
protected HibernateTemplate getHibernateTemplate(){
   return hibernateTemplate
}
//获取iBatis的模板
protected SqlMapClientTemplate getSqlMapClientTemplate() {
return sqlMapClientTemplate;
}

    //一些Hibernate 的通用方法,
//当然也可不必声明，子类通过hibernateTemplate来操作

    protected void save(Object object) {
        hibernateTemplate.save(object);
    }
    protected void saveOrUpdate(Object object) {
        hibernateTemplate.saveOrUpdate(object);
    }

    protected void update(Object object) {
        hibernateTemplate.update(object);
    }
    protected void delete(Object object){
        hibernateTemplate.delete(object);
    }
    protected Object getObject(Class clazz, Serializable id){
        return hibernateTemplate.get(clazz, id);
    }
   
//子类通过iBatis 的sqlMapClientTemplate来操作
}


即以组合方式，将HibernateTemplate和sqlMapClientTemplate集成起来，完成类似SqlMapClientDaoSupport和HibernateDaoSupport的工作，由于Java无法多类继承，所以只得以组合方式来做。不过Spring的两个Support代码不多，自己做满好，满好－－记得这是梁家辉在《棋王》上最爱说说的:)
在Spring中的主要配置是这样的：
首先配置Hibernate的SessionFactory：

代码

<bean id="sessionFactory" class="org.springframework.orm.hibernate3.LocalSessionFactoryBean">
<!-- 引用上述定义的数据源 -->
<property name="dataSource">
<ref local="dataSource"/>
</property>

<!-- 定义Hibernate映射文件（资源） -->
<property name="mappingDirectoryLocations">
<list>
<value>classpath:/mypack</value>
</list>
</property>

<!-- 定义Hibernate配置属性 -->
<property name="hibernateProperties">
<props>
<prop key="hibernate.dialect">${hibernate.dialect}</prop>
<prop key="hibernate.show_sql">${hibernate.show_sql}</prop>
<prop key="hibernate.cglib.use_reflection_optimizer">${hibernate.cglib.use_reflection_optimizer}</prop>
</props>
</property>
<property name="useTransactionAwareDataSource" value="true"></property>
</bean>

再是iBatis的sqlMapClient

代码

    <bean id="sqlMapClient" class="org.springframework.orm.ibatis.SqlMapClientFactoryBean">
        <property name="configLocation" value="sql-map-config.xml"/>
        <property name="dataSource" ref="dataSource"/>   
        <property name="useTransactionAwareDataSource" value="true"></property>    
    </bean>

两者是useTransactionAwareDataSource属性都设置为ture，看Spring的Javadoc，说这可以在多Orm框架中保持事务的一致性，即通过DataSource关联，果真如此否？我还没有确定出来。
事务管理器，用Hibernate的

代码

     <!-- 事务处理的AOP配置 -->
<bean id="transactionManager" class="org.springframework.orm.hibernate3.HibernateTransactionManager">
<property name="sessionFactory">
<ref local="sessionFactory"/>
</property>
</bean >

<bean id="txProxyTemplate" abstract="true"
        class="org.springframework.transaction.interceptor.TransactionProxyFactoryBean">    
    <!-- 指定事务管理器 -->
    <property name="transactionManager" >
    <ref local="transactionManager"/>
    </property>
   
    <!-- 指定业务策略 -->
    <property name="transactionAttributes">
      <props>
         <prop key="get*">PROPAGATION_REQUIRED,readOnly</prop>
         <prop key="add*">PROPAGATION_REQUIRED</prop>
         <prop key="update*">PROPAGATION_REQUIRED</prop>
         <prop key="delete*">PROPAGATION_REQUIRED</prop>
      </props>
    </property>
</bean>

然后做两个Dao，一个是CustomerDao，这个走Hibernate，直接看其实现：

代码

   package mypack.dao;

import mypack.Customer;

public class CustomerDaoImpl extends BaseDaoImpl implements CustomerDao {

public void update(Customer customer) {
        super.save(customer);
}
}

再看OrderDao的实现，这个走iBatis（先分道扬镳，再殊途同归）：

代码

     package mypack.dao;

import java.sql.SQLException;

import org.springframework.orm.ibatis.SqlMapClientCallback;

public class OrderDaoImpl extends BaseDaoImpl implements OrderDao {
  /**
   * update ibatis
   */
  public void updateOrderPrice(float rate)
  {   
getSqlMapClientTemplate().update("updateOrderPrice",null);
  }
}

再在一个Service中同时用这两上Dao完成一个事务：

代码

    package mypack.service;

import mypack.Customer;
import mypack.dao.CustomerDao;
import mypack.dao.OrderDao;

public class CustomerServiceImpl implements CustomerService {

private CustomerDao customerDao;
private OrderDao orderDao;
public void updateCustomerAndOrder(Customer customer, float rate) {
customerDao.update(customer);
orderDao.updateOrderPrice(rate);
}
public CustomerDao getCustomerDao() {
return customerDao;
}
public void setCustomerDao(CustomerDao customerDao) {
this.customerDao = customerDao;
}
public OrderDao getOrderDao() {
return orderDao;
}
public void setOrderDao(OrderDao orderDao) {
this.orderDao = orderDao;
}
}

插入一条Customer记录，再Update所有Order（纯粹研究，没有实际意义）
走：

代码

package test.service;

import org.apache.log4j.PropertyConfigurator;
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;

public class SysInit
{
    public static ApplicationContext factory = null;
    private static String[] filepath = {"applicationContext_service.xml"};
    public static void init()
    {
    PropertyConfigurator.configure("D:\\personalWork\\proGroup\\hiTestPro\\src\\log4j.properties");
    if (factory == null)
        {
            try
            {
               factory = new  ClassPathXmlApplicationContext(filepath);
           

            } catch (Exception e)
            {
                e.printStackTrace();
            }
        }

        try
        {
        } catch (Exception e)
        {
            e.printStackTrace();
        }
    }

    public static Object getBean(String name)
    {
        if (factory == null)
        {
            init();
        }
        return factory.getBean(name);
    }

    public static void main(String[] args)
    {
        SysInit.init();
    }
}

    package test.service;

import junit.framework.TestCase;
import mypack.Customer;
import mypack.service.CustomerService;

public class CustomerServiceTest extends TestCase {

protected void setUp() throws Exception {
super.setUp();
SysInit.init();
}

protected void tearDown() throws Exception {
super.tearDown();
}

public void testupdateCustomerAndOrder()
{
CustomerService customerService = (CustomerService)SysInit.getBean("customerService");
Customer customer = new Customer();
customer.setId(3L);
customer.setFirstname("xiong");
customer.setLastname("hua");
    customer.setSex('F');
customerService.updateCustomerAndOrder(customer, 2);
}
}

我测试了一下，如果iBatis的操作有问题，Customer也是没有办法插入了，所以基本上判断，这两个框架是可以做事务的。
各位看客以为如何？引玉中....

评论

1 楼 itshu 2008-10-29  

感觉不错
看看