Programmatic transaction demarcation

xml 代码

<beans>
   ...

   <bean id="myTxManager" class="org.springframework.orm.hibernate.HibernateTransactionManager">
     <property name="sessionFactory" ref="mySessionFactory"/>
   </bean>

   <bean id="myProductService" class="product.ProductServiceImpl">
     <property name="transactionManager" ref="myTxManager"/>
     <property name="productDao" ref="myProductDao"/>
   </bean>

</beans>

 

java 代码

public class ProductServiceImpl implements ProductService {

     private PlatformTransactionManager transactionManager;
     private ProductDao productDao;

     public void setTransactionManager(PlatformTransactionManager transactionManager) {
         this.transactionManager = transactionManager;
     }

     public void setProductDao(ProductDao productDao) {
         this.productDao = productDao;
     }

     public void increasePriceOfAllProductsInCategory(final String category) {
         TransactionTemplate transactionTemplate = new TransactionTemplate(this.transactionManager);
         transactionTemplate.setPropagationBehavior(TransactionDefinition.PROPAGATION_REQUIRED);
         transactionTemplate.execute(
             new TransactionCallbackWithoutResult() {
                 public void doInTransactionWithoutResult(TransactionStatus status) {
                     List productsToChange = productDAO.loadProductsByCategory(category);
                     ...
                 }
             }
         );
     }
}