EhCache : Why my diskStore path directory is not created?

Question

I am working with ehcache. I am caching Spring @Service method :

@Service( value = "dataServicesManager" )
@Transactional
public class DataServicesManager implements IDataServicesManager{

    @Autowired
    private IDataDAO dataDAO;



    @Override
    @Cacheable( value = "alldatas" )
    public List<Data> getAllDatas(Integer param) {

                // my logic

        return results;

    }
// others services
}

Here is the Spring configuration snippet:

 <cache:annotation-driven/>

<bean id="cacheManager" class="org.springframework.cache.ehcache.EhCacheCacheManager">
    <property name="cacheManager" ref="ehcache"/>
</bean>
<bean id="ehcache" class="org.springframework.cache.ehcache.EhCacheManagerFactoryBean">
    <property name="configLocation" value="WEB-INF/ehcache.xml"/>
    <property name="shared" value="true"/>
</bean>

Here is my ehcache configuration.

<ehcache xsi:noNamespaceSchemaLocation="ehcache.xsd" updateCheck="true" monitoring="autodetect" dynamicConfig="true">

<diskStore path="C:/TEMP/ehcache"/>

<defaultCache   eternal="false"
       timeToIdleSeconds="300"
       timeToLiveSeconds="1200"
       overflowToDisk="true"
       diskPersistent="false"
       diskExpiryThreadIntervalSeconds="120" />

<cache name="alldatas" maxEntriesLocalHeap="10000" eternal="false"
        timeToIdleSeconds="21600" timeToLiveSeconds="21600" memoryStoreEvictionPolicy="LRU">

    </cache>

</ehcache>

When i call the service method getAllDatas from a Spring @Controller the method is cached and the second time call retrieve the result stores in cache. What i don't understand is that i cannot find the <diskStore path="C:/TEMP/ehcache"/> specify in the ehcache.xml. So i have two questions :

Question 1: Why "C:/TEMP/ehcache" directory is not created ?

Question 2: Where is cached my service results ?

Answer 1

Your Ehcache configuration is to blame.

The defaultCache element will only be used when you create a cache programatically without specifying a configuration.

But you define explicitly your alldatas cache, without any disk options.

So your configuration needs to become:

<cache name="alldatas" maxEntriesLocalHeap="10000" eternal="false"
    timeToIdleSeconds="21600" timeToLiveSeconds="21600" memoryStoreEvictionPolicy="LRU"
    overflowToDisk="true"
    diskPersistent="false"
    diskExpiryThreadIntervalSeconds="120">

</cache> 

And then this cache will use the disk store.

If you do not plan on having other caches in your application, you can also remove the defaultCache element for clarity.