Hibernate Cache总是错过

时间：2012-11-14 16:18:36

标签： java spring hibernate ehcache

我在Spring框架中使用Hibernate，并尝试缓存通过CriteriaAPI编写的查询。我已经启用了查询缓存和二级缓存。我还在该特定查询中将setCacheable设置为true。问题是，hibernate会话统计信息显示它会在数据库中找到我多次运行的同一查询的所有内容。

这里是标准查询的功能

@Override
public Collection<Article> findLatestArticle(int count) {
    // TODO Auto-generated method stub
    Criteria criteria = this.getSession()
    .createCriteria(Article.class)
    .setCacheable(true)
    .setCacheRegion(CACHE_REGION)
    .add(Restrictions.eq("isVisible", 1))
    //.createCriteria("Count")
    //.add(Restrictions.eq("Count", count))
    .setFirstResult(0)
    .setMaxResults(count);

    return criteria.list();
}

这里是来电者功能

@Test
public void t1(){
    List<Article> articleList = (List<Article>) articleDao.findLatestArticle(1);

    //Article a = articleDao.findById(articlePk);

    for(int i=0; i<19; i++)
        articleDao.findLatestArticle(1);

    Statistics stats = sessionFactory.getCurrentSession().getSessionFactory().getStatistics();

    //System.out.println("2nd Lvl Stats: " + stats.getSecondLevelCacheStatistics(CACHE_REGION));
    stats.logSummary();

    System.out.println("Empty: " + articleList.isEmpty());

    assertTrue(!articleList.isEmpty());
    //assertNotNull(a);
}

spring-hibernate-context file 

<property name="hibernateProperties">
        <props>
            <prop key="hibernate.dialect">org.hibernate.dialect.MySQL5InnoDBDialect</prop>
            <prop key="hibernate.show_sql">false</prop>
            <prop key="hibernate.transaction.factory_class">org.hibernate.transaction.JDBCTransactionFactory</prop>
            <prop key="hibernate.cache.use_second_level_cache">true</prop>
            <prop key="hibernate.cache.use_query_cache">true</prop>
            <prop key="hibernate.cache.provider_class">org.hibernate.cache.EhCacheProvider</prop>
            <prop key="hibernate.generate_statistics">true</prop>
            <prop key="hibernate.cache.use_structured_entries">true</prop>
            <prop key="net.sf.Ehcache.configurationResourceName">ehcache.xml</prop>
        </props>
    </property>

本课程的ehcache部分

<cache name="com.contento3.cms.article.model.Article"
maxElementsInMemory="10000"
eternal="false"
timeToIdleSeconds="300"
timeToLiveSeconds="60"
overflowToDisk="true"/>

记录摘录：

    2012-11-14 21:05:03,020 [main] INFO  org.hibernate.cfg.SettingsFactory - Second-level cache: enabled
2012-11-14 21:05:03,020 [main] INFO  org.hibernate.cfg.SettingsFactory - Query cache: enabled
    2012-11-14 21:05:03,969 [main] INFO  org.hibernate.cache.StandardQueryCache - starting query cache at region: com.contento3.cms.article.model.Article
2012-11-14 21:05:03,998 [main] INFO  org.hibernate.stat.Statistics - HQL: from Article as a, time: 10ms, rows: 1
2012-11-14 21:05:04,010 [main] INFO  org.hibernate.stat.Statistics - HQL: from Article as a, time: 1ms, rows: 1
2012-11-14 21:05:04,019 [main] INFO  org.hibernate.stat.Statistics - HQL: from Article as a, time: 8ms, rows: 1
2012-11-14 21:05:04,022 [main] INFO  org.hibernate.stat.Statistics - HQL: from Article as a, time: 2ms, rows: 1
2012-11-14 21:05:04,024 [main] INFO  org.hibernate.stat.Statistics - HQL: from Article as a, time: 2ms, rows: 1
2012-11-14 21:05:04,026 [main] INFO  org.hibernate.stat.Statistics - HQL: from Article as a, time: 2ms, rows: 1
2012-11-14 21:05:04,033 [main] INFO  org.hibernate.stat.Statistics - HQL: from Article as a, time: 7ms, rows: 1
2012-11-14 21:05:04,035 [main] INFO  org.hibernate.stat.Statistics - HQL: from Article as a, time: 2ms, rows: 1
2012-11-14 21:05:04,038 [main] INFO  org.hibernate.stat.Statistics - HQL: from Article as a, time: 2ms, rows: 1
2012-11-14 21:05:04,041 [main] INFO  org.hibernate.stat.Statistics - HQL: from Article as a, time: 2ms, rows: 1
2012-11-14 21:05:04,050 [main] INFO  org.hibernate.stat.Statistics - HQL: from Article as a, time: 3ms, rows: 1
2012-11-14 21:05:04,059 [main] INFO  org.hibernate.stat.Statistics - HQL: from Article as a, time: 9ms, rows: 1
2012-11-14 21:05:04,062 [main] INFO  org.hibernate.stat.Statistics - HQL: from Article as a, time: 3ms, rows: 1
2012-11-14 21:05:04,067 [main] INFO  org.hibernate.stat.Statistics - HQL: from Article as a, time: 4ms, rows: 1
2012-11-14 21:05:04,074 [main] INFO  org.hibernate.stat.Statistics - HQL: from Article as a, time: 5ms, rows: 1
2012-11-14 21:05:04,077 [main] INFO  org.hibernate.stat.Statistics - HQL: from Article as a, time: 2ms, rows: 1
2012-11-14 21:05:04,079 [main] INFO  org.hibernate.stat.Statistics - HQL: from Article as a, time: 1ms, rows: 1
2012-11-14 21:05:04,081 [main] INFO  org.hibernate.stat.Statistics - HQL: from Article as a, time: 1ms, rows: 1
2012-11-14 21:05:04,083 [main] INFO  org.hibernate.stat.Statistics - HQL: from Article as a, time: 2ms, rows: 1
2012-11-14 21:05:04,085 [main] INFO  org.hibernate.stat.Statistics - HQL: from Article as a, time: 2ms, rows: 1
2012-11-14 21:05:04,085 [main] INFO  org.hibernate.stat.ConcurrentStatisticsImpl - Logging statistics....
2012-11-14 21:05:04,085 [main] INFO  org.hibernate.stat.ConcurrentStatisticsImpl - start time: 1352909103053
2012-11-14 21:05:04,085 [main] INFO  org.hibernate.stat.ConcurrentStatisticsImpl - sessions opened: 1
2012-11-14 21:05:04,085 [main] INFO  org.hibernate.stat.ConcurrentStatisticsImpl - sessions closed: 0
2012-11-14 21:05:04,086 [main] INFO  org.hibernate.stat.ConcurrentStatisticsImpl - transactions: 0
2012-11-14 21:05:04,086 [main] INFO  org.hibernate.stat.ConcurrentStatisticsImpl - successful transactions: 0
2012-11-14 21:05:04,086 [main] INFO  org.hibernate.stat.ConcurrentStatisticsImpl - optimistic lock failures: 0
2012-11-14 21:05:04,086 [main] INFO  org.hibernate.stat.ConcurrentStatisticsImpl - flushes: 0
2012-11-14 21:05:04,086 [main] INFO  org.hibernate.stat.ConcurrentStatisticsImpl - connections obtained: 1
2012-11-14 21:05:04,086 [main] INFO  org.hibernate.stat.ConcurrentStatisticsImpl - statements prepared: 21
2012-11-14 21:05:04,086 [main] INFO  org.hibernate.stat.ConcurrentStatisticsImpl - statements closed: 21
2012-11-14 21:05:04,086 [main] INFO  org.hibernate.stat.ConcurrentStatisticsImpl - second level cache puts: 0
2012-11-14 21:05:04,086 [main] INFO  org.hibernate.stat.ConcurrentStatisticsImpl - second level cache hits: 0
2012-11-14 21:05:04,086 [main] INFO  org.hibernate.stat.ConcurrentStatisticsImpl - second level cache misses: 0
2012-11-14 21:05:04,086 [main] INFO  org.hibernate.stat.ConcurrentStatisticsImpl - entities loaded: 0
2012-11-14 21:05:04,086 [main] INFO  org.hibernate.stat.ConcurrentStatisticsImpl - entities updated: 0
2012-11-14 21:05:04,086 [main] INFO  org.hibernate.stat.ConcurrentStatisticsImpl - entities inserted: 1
2012-11-14 21:05:04,086 [main] INFO  org.hibernate.stat.ConcurrentStatisticsImpl - entities deleted: 0
2012-11-14 21:05:04,086 [main] INFO  org.hibernate.stat.ConcurrentStatisticsImpl - entities fetched (minimize this): 0
2012-11-14 21:05:04,087 [main] INFO  org.hibernate.stat.ConcurrentStatisticsImpl - collections loaded: 0
2012-11-14 21:05:04,087 [main] INFO  org.hibernate.stat.ConcurrentStatisticsImpl - collections updated: 0
2012-11-14 21:05:04,087 [main] INFO  org.hibernate.stat.ConcurrentStatisticsImpl - collections removed: 0
2012-11-14 21:05:04,087 [main] INFO  org.hibernate.stat.ConcurrentStatisticsImpl - collections recreated: 0
2012-11-14 21:05:04,087 [main] INFO  org.hibernate.stat.ConcurrentStatisticsImpl - collections fetched (minimize this): 0
2012-11-14 21:05:04,087 [main] INFO  org.hibernate.stat.ConcurrentStatisticsImpl - queries executed to database: 20
2012-11-14 21:05:04,087 [main] INFO  org.hibernate.stat.ConcurrentStatisticsImpl - query cache puts: 20
2012-11-14 21:05:04,087 [main] INFO  org.hibernate.stat.ConcurrentStatisticsImpl - query cache hits: 0
2012-11-14 21:05:04,087 [main] INFO  org.hibernate.stat.ConcurrentStatisticsImpl - query cache misses: 20
2012-11-14 21:05:04,087 [main] INFO  org.hibernate.stat.ConcurrentStatisticsImpl - max query time: 10ms

我是Spring和Hibernate的新手。我已经阅读了至少十几篇有关此问题的文章，并尽我所能。另外，我使用createQuery方法编写了类似的查询，结果是一样的。任何帮助将不胜感激。

1 个答案:

答案 0 :(得分：0)

尝试为此启用注释 @Cacheable @cache与缓存策略

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