ConfigDaoImpl.java

package org.xmx0632.deliciousfruit.repository.impl;

import java.util.List;

import javax.persistence.EntityManager;
import javax.persistence.EntityManagerFactory;
import javax.persistence.TypedQuery;

import org.springframework.beans.factory.annotation.Autowired;
import org.xmx0632.deliciousfruit.entity.Config;
import org.xmx0632.deliciousfruit.repository.ConfigCachedDao;

/**
 * 自定义Dao实现类例子
 * 
 * @author xmx0632
 * 
 */
public class ConfigDaoImpl implements ConfigCachedDao {

	private static final String ORG_HIBERNATE_CACHEABLE = "org.hibernate.cacheable";

	@Autowired(required = true)
	private EntityManagerFactory entityManagerFactory;

	private EntityManager entityManager;

	public EntityManager getEntityManager() {
		if (entityManager == null) {
			System.out.println("create entityManager");
			entityManager = entityManagerFactory.createEntityManager();
		}
		return entityManager;
	}

	@Override
	public Config findByNameCachedJpa(String name) {
		TypedQuery<Config> query = getEntityManager().createQuery(
				"from Config where name = :name", Config.class);

		query.setParameter("name", name);
		query.setHint(ORG_HIBERNATE_CACHEABLE, Boolean.TRUE);
		return query.getSingleResult();
	}

	@Override
	public Config findByNameCachedHibernate(String name) {
		TypedQuery<Config> query = getEntityManager().createQuery(
				"from Config where name = :name", Config.class);

		org.hibernate.Query hquery = query.unwrap(org.hibernate.Query.class);
		hquery.setParameter("name", name);
		hquery.setCacheable(true);
		return (Config) hquery.uniqueResult();
	}

	@Override
	public List<Config> findAllByNameCachedJpa(String name) {
		TypedQuery<Config> query = getEntityManager().createQuery(
				"from Config where name = :name", Config.class);

		query.setParameter("name", name);
		query.setHint(ORG_HIBERNATE_CACHEABLE, Boolean.TRUE);
		return query.getResultList();

	}

	@Override
	public List<Config> findAllByNameCachedHibernate(String name) {
		TypedQuery<Config> query = getEntityManager().createQuery(
				"from Config where name = :name", Config.class);

		org.hibernate.Query hquery = query.unwrap(org.hibernate.Query.class);
		hquery.setParameter("name", name);
		hquery.setCacheable(true);
		return hquery.list();
	}
}