Spring+Hibernate實現動態SessionFactory切換

1.配置多個數據源和SessionFactory，並給相應SessionFactory配置事務管理：

 

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
	xmlns:p="http://www.springframework.org/schema/p"
	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" 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/aop http://www.springframework.org/schema/aop/spring-aop-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/context http://www.springframework.org/schema/context/spring-context-3.0.xsd">
	<!-- FOR SqlServer-->
	<bean id="SqlServer_DataSource"
		class="org.springframework.jdbc.datasource.DriverManagerDataSource">
		<property name="driverClassName" value="com.microsoft.sqlserver.jdbc.SQLServerDriver" />
		<property name="url"
			value="url" />
		<property name="username" value="username" />
		<property name="password" value="password" />
	</bean>
	<bean id="SqlServer_SessionFactory"
		class="org.springframework.orm.hibernate3.LocalSessionFactoryBean"
		p:mappingLocations="classpath:/com/entity/*.hbm.xml">
		<property name="dataSource" ref="SqlServer_DataSource" />		
		<property name="hibernateProperties">
			<props>				
				<prop key="hibernate.query.factory_class">org.hibernate.hql.ast.ASTQueryTranslatorFactory</prop>
				<prop key="hibernate.dialect">org.hibernate.dialect.SQLServer2008Dialect</prop>				
				<prop key="hibernate.show_sql">true</prop>
				<prop key="hibernate.format_sql">true</prop>
			</props>
		</property>
	</bean>
	<bean id="SqlServer_TransactionManager"
		class="org.springframework.orm.hibernate3.HibernateTransactionManager">
		<property name="sessionFactory" ref="SqlServer_SessionFactory"/>
	</bean>
	
	<!-- FOR Oracle -->
	<bean id="Oracle _DataSource"
		class="org.springframework.jdbc.datasource.DriverManagerDataSource">		
		<property name="driverClassName" value="oracle.jdbc.OracleDriver" />
		<property name="url" value="jdbc:oracle:thin:@localhost:1521/orcl" />
		<property name="username" value="username" />
		<property name="password" value="password" />
	</bean>
	<bean id="Oracle_SessionFactory"
		class="org.springframework.orm.hibernate3.LocalSessionFactoryBean" 
		p:mappingLocations="classpath:/com/entity/*.hbm.xml">
		<property name="dataSource" ref="Oracle_DataSource" />		
		<property name="hibernateProperties">
			<props>
				<prop key="hibernate.query.factory_class">org.hibernate.hql.ast.ASTQueryTranslatorFactory</prop>
				<prop key="hibernate.dialect">org.hibernate.dialect.Oracle10gDialect</prop>				
				<prop key="hibernate.show_sql">true</prop>
				<prop key="hibernate.format_sql">true</prop>
			</props>
		</property>
	</bean>
	<bean id="Oracle_TransactionManager"
		class="org.springframework.orm.hibernate3.HibernateTransactionManager">
		<property name="sessionFactory" ref="Oracle_SessionFactory"/>
	</bean>
	
	
</beans>

 

2. 爲SessionFactory配置事務切面

 

<tx:advice id="SqlServer_TxAdvice" transaction-manager="SqlServer_TransactionManager">
		<tx:attributes>
			<tx:method name="get*" read-only="true" />
			<tx:method name="find*" read-only="true" />
			<tx:method name="*" propagation="REQUIRED" rollback-for="Exception" />
		</tx:attributes>
	</tx:advice>
	<tx:advice id="Oracle_TxAdvice" transaction-manager="Oracle_TransactionManager">
		<tx:attributes>
			<tx:method name="get*" read-only="true" />
			<tx:method name="find*" read-only="true" />
			<tx:method name="*" propagation="REQUIRED" rollback-for="Exception" />
		</tx:attributes>
	</tx:advice>
	
	
	
	<aop:config proxy-target-class="true">  
        <aop:pointcut id="txPointcut" expression="execution(* com.service.*.*(..))"/>        
        <aop:advisor advice-ref="SqlServer_TxAdvice" pointcut-ref="txPointcut" order="1"/> 
        <aop:advisor advice-ref="Oracle_TxAdvice" pointcut-ref="txPointcut" order="2"/> 
    </aop:config>

 

3. 配置一個動態的SessionFactory：

 

<bean id="sessionFactory" class="com.DynamicSessionFactory"/> 

 

4. 定義DynamicSessionFactory實現接口SessionFactory：

 

public class DynamicSessionFactory implements SessionFactory ,ApplicationContextAware{
	
	private static final long serialVersionUID = 1L;

	private ApplicationContext applicationContext;
	
	private SessionFactory getSessionFactory(String name) {
		return (SessionFactory) applicationContext.getBean(name);
	}
        //根據當前線程的SessionFactoryName獲取SessionFactory
	private SessionFactory getSessionFactory() {
		return getSessionFactory(ThreadLocalUtil.
				.getSessionFactoryName());
	}

	public Reference getReference() throws NamingException {
		return getSessionFactory().getReference();
	}

	

	public Session openSession() throws HibernateException {
		return getSessionFactory().openSession();
	}

	public Session openSession(Interceptor interceptor)
			throws HibernateException {
		return getSessionFactory().openSession(interceptor);
	}

	public Session openSession(Connection connection) {
		return getSessionFactory().openSession(connection);
	}

	public Session openSession(Connection connection, Interceptor interceptor) {
		return getSessionFactory().openSession(connection,interceptor);
	}

	public Session getCurrentSession() throws HibernateException {
		return getSessionFactory().getCurrentSession();
	}

	public StatelessSession openStatelessSession() {
		return getSessionFactory().openStatelessSession();
	}

	public StatelessSession openStatelessSession(Connection connection) {
		return getSessionFactory().openStatelessSession(connection);
	}

	public ClassMetadata getClassMetadata(Class entityClass) {
		return getSessionFactory().getClassMetadata(entityClass);
	}

	public ClassMetadata getClassMetadata(String entityName) {
		return getSessionFactory().getClassMetadata(entityName);
	}

	public CollectionMetadata getCollectionMetadata(String roleName) {
		return getSessionFactory().getCollectionMetadata(roleName);
	}

	public Map getAllClassMetadata() {
		return getSessionFactory().getAllClassMetadata();
	}

	public Map getAllCollectionMetadata() {
		return getSessionFactory().getAllCollectionMetadata();
	}

	public Statistics getStatistics() {
		return getSessionFactory().getStatistics();
	}

	public void close() throws HibernateException {
		getSessionFactory().close();
	}

	public boolean isClosed() {
		return getSessionFactory().isClosed();
	}

	public Cache getCache() {
		return getSessionFactory().getCache();
	}

	public void evict(Class persistentClass) throws HibernateException {
		getSessionFactory().evict(persistentClass);
	}

	public void evict(Class persistentClass, Serializable id)
			throws HibernateException {
		getSessionFactory().evict(persistentClass, id);
	}

	public void evictEntity(String entityName) throws HibernateException {
		getSessionFactory().evictEntity(entityName);
	}

	public void evictEntity(String entityName, Serializable id)
			throws HibernateException {
		getSessionFactory().evictEntity(entityName, id);
	}

	public void evictCollection(String roleName) throws HibernateException {
		getSessionFactory().evictCollection(roleName);
	}

	public void evictCollection(String roleName, Serializable id)
			throws HibernateException {
		getSessionFactory().evictCollection(roleName, id);
	}

	public void evictQueries(String cacheRegion) throws HibernateException {
		getSessionFactory().evictQueries(cacheRegion);
	}

	public void evictQueries() throws HibernateException {
		getSessionFactory().evictQueries();
	}

	public Set getDefinedFilterNames() {
		return getSessionFactory().getDefinedFilterNames();
	}

	public FilterDefinition getFilterDefinition(String filterName)
			throws HibernateException {
		return getSessionFactory().getFilterDefinition(filterName);
	}

	public boolean containsFetchProfileDefinition(String name) {
		return getSessionFactory().containsFetchProfileDefinition(name);
	}

	@Override
	public void setApplicationContext(ApplicationContext applicationContext)
			throws BeansException {
		this.applicationContext = applicationContext;
	}	

}