配置的二級緩存和數據不從二級緩存中加載

我配置了二級緩存使用Ehcache在hibernate.cfg.xml中，ehcache.xml.And在映射文件中設置cache-usage屬性。並將tyring檢查數據從高速緩衝存儲器加載或DB使用hibenrate statices.But其不loaded.Its再次執行query.I提到代碼配置的二級緩存和數據不從二級緩存中加載

<hibernate-configuration> 
<session-factory> 
    <property name="connection.username">pension2</property> 
    <property name="connection.password">pension2</property> 
    <property name="connection.url">jdbc:oracle:thin:@191.161.0.25:1521:pension</property> 
    <property name="connection.driver_class">oracle.jdbc.driver.OracleDriver</property> 
    <property name="dialect">org.hibernate.dialect.OracleDialect</property> 
    <property name="myeclipse.connection.profile">pension</property> 
    <property name="show_sql">true</property> 
    <property name="format_sql">true</property> 
    <property name="use_sql_comments">true</property> 

    <property name="hibernate.cache.use_second_level_cache">true</property> 
    <property name="hibernate.generate_statistics">true</property> 
    <property name="hibernate.cache.region.provider_class"> 
     net.sf.ehcache.hibernate.EhCacheProvider</property> 
    <property name="hibernate.cache.provider_configuration_file_resource_path">/ehcache.xml </property>  
    <mapping resource="com/aims/mapping/Teacher.hbm.xml" /> 
    <mapping resource="com/aims/mapping/Student.hbm.xml" /> 
    <mapping resource="com/aims/mapping/Student_marks_detl.hbm.xml" /> 
    <mapping resource="com/aims/mapping/User.hbm.xml" /> 

</session-factory> 
</hibernate-configuration>

ehcache.xml中

<ehcache> 
    <diskStore path="java.io.tmpdir"/> 
    <cache name="com.aims.beans.Teacher" 
    maxElementsInMemory="300" 
    eternal="false" 
    overflowToDisk="false"/> 
    </ehcache>

Mapping.xml

<hibernate-mapping> 
<class name="com.aims.beans.Teacher" table="teacher"> 
<cache usage="read-write" /> 
<id name="tno" column="tno" type="java.lang.Integer" > 
    <generator class="assigned" /> 
</id> 
<property name="tname" type="java.lang.String" column="tname"/> 
</class> 
</hibernate-mapping>

我嘗試使用的createQuery加載在我jsp.So，蔭教師名單和setCacheable是真實的。

long oldHitCount = HibernateUtil.getHitCount（）;
long oldMissCount = HibernateUtil.getMissCount（）;
log.info（「oldHitCount」+ oldHitCount +「oldMissCount」+ oldMissCount）; 查詢q = session.createQuery（「from Teacher」）; q.setCacheable（true）;
list = q.list（）; long newHitCount = HibernateUtil.getHitCount（）;
long newMissCount = HibernateUtil.getMissCount（）;

HibernateUtil.getHitCount（）/ HibernateUtil.getMissCount（）代碼

public static long getHitCount() { 
     long hitcount = 0; 
     hitcount = sessionFactory.getStatistics() 
       .getSecondLevelCacheStatistics("com.aims.beans.Teacher") 
       .getHitCount(); 
     return hitcount; 
    } 

    public static long getMissCount() { 
     long miscount = 0; 
     miscount = sessionFactory.getStatistics() 
       .getSecondLevelCacheStatistics("com.aims.beans.Teacher") 
       .getMissCount(); 
     return miscount; 
    }

但每次執行createQuery.I配置和爲什麼它不從cache.Is有沒有搞錯退換每一件事配置二級緩存。請幫助我>？

來源

2012-03-17 user1127214

第二級緩存將id映射到實體，所以它僅在實體被id查詢時使用。查詢緩存將查詢映射到由查詢檢索到的一組實體ID。因此，二級緩存和查詢緩存實際上僅在一起使用時纔有用。

要啓用查詢緩存是不夠的，設置查詢緩存，但你還必須啓用查詢緩存在Hibernate session-factory配置：

<property name="hibernate.cache.use_query_cache">true</property>

希望這有助於。

來源

2012-03-17 11:24:52 tscho

配置的二級緩存和數據不從二級緩存中加載

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