如何验证我的ehcache配置是否正常工作？

Question

I am trying to verify if my ehcache configuration is working properly. So I put this code before and after the select. And my app execute the select all times for the same row... I did all my configuration using this tutorial. https://balamaci.wordpress.com/2009/12/07/caching-with-ehcache-part-i/

String msg = "select blockIscsi: " + storage.getStorageIndex();
System.out.println(msg);
blockIscsi = blockIscsiDAO.getByKey(storage.getStorageIndex(), Long.valueOf(storage.getPartitionId()));
System.out.println("done!");


select blockIscsi: 757
Hibernate: select this_.STORAGEINDEX as STORAGEI1_32_0_, this_.PARTITIONID as PARTITIO2_32_0_, this_.BLOCK_STATUS as BLOCK3_32_0_, this_.BLOCK_TYPE as BLOCK4_32_0_, this_.USTORE_ID as USTORE5_32_0_ from blocks this_ where this_.STORAGEINDEX=? and this_.PARTITIONID=?
done!
select blockIscsi: 757
Hibernate: select this_.STORAGEINDEX as STORAGEI1_32_0_, this_.PARTITIONID as PARTITIO2_32_0_, this_.BLOCK_STATUS as BLOCK3_32_0_, this_.BLOCK_TYPE as BLOCK4_32_0_, this_.USTORE_ID as USTORE5_32_0_ from blocks this_ where this_.STORAGEINDEX=? and this_.PARTITIONID=?
done!
select blockIscsi: 757
Hibernate: select this_.STORAGEINDEX as STORAGEI1_32_0_, this_.PARTITIONID as PARTITIO2_32_0_, this_.BLOCK_STATUS as BLOCK3_32_0_, this_.BLOCK_TYPE as BLOCK4_32_0_, this_.USTORE_ID as USTORE5_32_0_ from blocks this_ where this_.STORAGEINDEX=? and this_.PARTITIONID=?
done!

EDIT: appContext.xml:

<property name="hibernateProperties">
    <props>
        <prop key="hibernate.dialect">org.hibernate.dialect.MySQLInnoDBDialect</prop>
        <prop key="hibernate.show_sql">false</prop>
        <prop key="hibernate.bytecode.use_reflection_optimizer">true</prop>
        <!-- <prop key="hibernate.cache.provider_class">org.hibernate.cache.EhCacheProvider</prop> -->
        <!-- <prop key="hibernate.cache.region.factory_class">org.hibernate.cache.ehcache.EhCacheRegionFactory 
            </prop> -->
        <prop key="hibernate.cache.region.factory_class">org.hibernate.cache.ehcache.SingletonEhCacheRegionFactory
        </prop>
        <!-- enable second level cache and query cache -->
        <prop key="hibernate.cache.use_second_level_cache">true</prop>
        <prop key="hibernate.cache.use_query_cache">false</prop>
        <prop key="net.sf.ehcache.configurationResourceName">ehcache.xml</prop>

        <prop key="hibernate.jdbc.batch_size">20</prop>
        <prop key="hibernate.jdbc.fetch_size">25</prop>
        <prop key="hibernate.order_inserts">true</prop>
        <prop key="hibernate.order_updates">true</prop>
        <prop key="hibernate.jdbc.batch_versioned_data">true</prop>
        <prop key="hibernate.hbm2ddl.auto">none</prop>

        <prop key="hibernate.c3p0.min_size">2</prop>
        <prop key="hibernate.c3p0.max_size">100</prop>
        <prop key="hibernate.c3p0.timeout">100</prop>
        <prop key="hibernate.c3p0.max_statements">0</prop>
        <prop key="hibernate.c3p0.maxIdle">-1</prop>
        <prop key="hibernate.c3p0.idle_test_period">100</prop>
        <prop key="hibernate.c3p0.acquire_increment">1</prop>
        <prop key="hibernate.c3p0.unreturnedConnectionTimeout">30</prop>
        <prop key="hibernate.c3p0.debugUnreturnedConnectionStackTraces">false</prop>
    </props>
</property>

ehcache.xml:

<?xml version="1.0" encoding="UTF-8"?>
<ehcache xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xsi:noNamespaceSchemaLocation="ehcache.xsd" updateCheck="true"
    monitoring="autodetect" dynamicConfig="true">

    <diskStore path="user.dir/ehcache" />

    <defaultCache maxEntriesLocalHeap="10000" eternal="false"
        timeToIdleSeconds="0" timeToLiveSeconds="1800" diskSpoolBufferSizeMB="80"
        maxEntriesLocalDisk="10000000" diskExpiryThreadIntervalSeconds="120"
        memoryStoreEvictionPolicy="LRU" statistics="true">
        <persistence strategy="localTempSwap" />
    </defaultCache>

    <cache name="blockiscsi" maxEntriesLocalHeap="10000" eternal="false"
        timeToIdleSeconds="5" timeToLiveSeconds="10">
        <persistence strategy="localTempSwap" />
    </cache>

    <cache name="org.hibernate.cache.internal.StandardQueryCache"
        maxEntriesLocalHeap="5" eternal="false" timeToLiveSeconds="120">
        <persistence strategy="localTempSwap" />
    </cache>

    <cache name="org.hibernate.cache.spi.UpdateTimestampsCache"
        maxEntriesLocalHeap="5000" eternal="true">
        <persistence strategy="localTempSwap" />
    </cache>
</ehcache>

DAO:

public BlockIscsi getByKey(Long id, Long partitionId) {
Session session = null;
BlockIscsi blockIscsi = null;
try {
    session = currentSession();

    Criteria criteria = session.createCriteria(BlockIscsi.class);
    criteria.add(Restrictions.eq("id", id));
    criteria.add(Restrictions.eq("partitionId", partitionId));
    criteria.setCacheable(true);
    criteria.setCacheRegion("query.blockiscsi");

    blockIscsi = (BlockIscsi) criteria.uniqueResult();

} catch (GenericJDBCException e) {
    e.printStackTrace();
} catch (NullPointerException e) {
    e.printStackTrace();
} finally {
    session.close();
}
return blockIscsi;
}

Answer 1

You have disabled query caching:

<prop key="hibernate.cache.use_query_cache">false</prop>

This means individual entities get cached (since your second level cache is on), but the result of your custom query (since you are doing a Criteria query, and not a Session.get() ) is not cached. For that reason Hibernate has to go to the database and execute the query.

You need to enable both the query cache (to remember the identifiers of the entities returned by the query) and the second level cache (to remember the entities themselves).

See the Hibernate docs for more information: https://docs.jboss.org/hibernate/orm/4.0/devguide/en-US/html/ch06.html