Re: [appfuse-user] Second level cache configuration question

Nelson Biasura Wed, 07 Oct 2009 23:01:25 -0700

After configuring ehcache.xml adding my object (GroupProduct)


Code: ehcache.xml
----------------------------------
<ehcache>

   <diskStore path="c:\\temp"/>

   <defaultCache
       maxElementsInMemory="10000"
       eternal="false"
       overflowToDisk="true"
       timeToIdleSeconds="120"
       timeToLiveSeconds="120"
       diskPersistent="false"
       diskExpiryThreadIntervalSeconds="120"/>

    <cache name="com.company.project.model.GroupProduct"
       maxElementsInMemory="100000"
       eternal="true"
       overflowToDisk="false"
       />
</ehcache>
----------------------------------



Log the measure the milliseconds load in DaoHibernate:

Code:  GroupProductDaoHibernate
-----------------------------------
   public List<GroupProduct> findByServiceId(String serviceId) {
       Long serviceIdLong = Long.valueOf(serviceId);
       List<GroupProduct> gpDTOList = new ArrayList<GroupProduct>();

       long a = System.currentTimeMillis();
       log.debug("start time -  DAO: " + a);

gpDTOList = getHibernateTemplate().find("from GroupProduct gpwhere gp.version=0 and gp.serviceID=" + serviceIdLong);


       long b = System.currentTimeMillis();
       log.debug("Execution time - DAO: " + (b - a) + " ms");

return gpDTOList;

   }
---------------------------------------

I got almost the same result in loading

Before:
9453 ms
8688 ms
9434 ms

After:
8492 ms
9000 ms
8239 ms

I am missing something here? is there something i need to tweak orconfigure/add etc.. To

get going on second level cache..

Thanks







Matt Raible wrote:

I believe adding the object into ehcache.xml is enough, but you might
want to check EhCache/Hibernate documentation to be sure.

Matt

On Wed, Oct 7, 2009 at 10:15 AM, Nelson Biasura
<nelson.bias...@aurisoftsys.com> wrote:

Thanks for the clarification Matt. Another thing do i still need to add
@Cache annotation in the object that
i want to be cache or adding the object into ehcache.xml is enough that i
dont need to configure anything anymore
and ready for second level caching?

Thanks for letting me understand.


Matt Raible wrote:

No, you should not need to do anything additional - EhCache is enabled
by default. You might want to modify ehcache.xml to configure which
objects to cache though.

Matt

On Wed, Oct 7, 2009 at 7:28 AM, Nelson Biasura
<nelson.bias...@aurisoftsys.com> wrote:

Hello,

Im using Appfuse 2.0.2 and I trying to configure second level cache, I
found
article written by matt
that leads me to this link
 http://www.devx.com/dbzone/Article/29685/0/page/2  .. In this example it
activated
the second level caching through hibernate.cfg.xml adding this code

|<property name="hibernate.cache.provider_class">
                      org.hibernate.cache.EHCacheProvider
</property>

My question is do i still need to do this? i found in
applicationContext-dao.xml

<property name="hibernateProperties">
         <value>
             hibernate.dialect=${hibernate.dialect}
             hibernate.query.substitutions=true 'Y', false 'N'
             hibernate.cache.use_second_level_cache=true

hibernate.cache.provider_class=org.hibernate.cache.EhCacheProvider
         </value>
         <!-- Turn batching off for better error messages under
PostgreSQL
-->
         <!-- hibernate.jdbc.batch_size=0 -->
 </property>

I assumed that this activate my second-level of caching. Anyone could
help
clarify it?

Thanks in advance. :)
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Re: [appfuse-user] Second level cache configuration question

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