In my environment we have parent object and child objects extends the parent. I want to enable caching for these objects. How can i set up.

In single object environment is working correctly. But in case of inherited objects,

If i set the <cache usage="read-write"/> for all the objects the factory error is happening. If i specify this tag only to the parent object. it creats objects correctly but load object will always return null.

I am using ehcache.

Can anyone help me in configuring caching in my environment.

If anybody point me out any of document links for the above requirement, it will be very helpful for me.