hibernateflushinterceptor.java

随书光盘：精通Sping 2.0 的随书源代码

package org.springframework.samples.petclinic.hibernate;

import org.aopalliance.intercept.MethodInterceptor;
import org.aopalliance.intercept.MethodInvocation;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.springframework.orm.hibernate3.support.HibernateDaoSupport;

/**
 * 供完成基于Hibernate的集成测试使用，保证在目标方法调用结束后立即调用.flush()方法，
 * 从而保证测试结果的正确性.
 * <li>使得目标DAO方法不用显式调用flush()，从而不会为了“测试”而测试，并不会对应用有任何影响。
 * <li>对于其他ORM引擎，可以提供类似的拦截器
 * 
 * @author worldheart
 *
 */
public class HibernateFlushInterceptor implements MethodInterceptor {
	
    protected static final Log log = LogFactory.getLog(HibernateFlushInterceptor.class);

    public Object invoke(MethodInvocation invocation) throws Throwable {
    	
        Object object = invocation.proceed();
        
        HibernateDaoSupport hds = (HibernateDaoSupport)invocation.getThis();
        
        hds.getHibernateTemplate().flush();
        
        log.info("returned from...." + invocation.getClass());
        
        return object;
    }

}