Hibernate version:3.0.5 (with EHCache)
A general question.

Hi everone.

Mapping and (second-level-)caching are working fine, but....

Imagine two small beans with getters and setters, let's say "PersonBean" and "ContractBean".

Attributes of PersonBean:
1. String name
2. Integer age
3. ContractBean contract

Attributes of ContractBean:
1. Integer contractType
2. Boolean isValid
3. Date expiryDate

Let's say "name" and "age" are gathered from a database with hibernate from a database.
The information for the ContractBean is gathered by calling a native program in the getContact-method of the PersonBean.
"Name" and "age" are cached well, but the "contract" isn't, so the native program has to be called every time (it shouldn't ;-)

How to add this one (not mapped) attribute "contract" to the cache ?
Or is there a possibility to do this by modifing the mapping, although this information isn't stored in a database ?


Thanks for any answers in advance

PropertyAccessor should do the job, does it ? How to use it ? No documents/examples found...

I'm facing the same problem rigtht now. My classes are having a couple of properties which are calculated when first accessed in a really expensive way. Unfortunately hibernate does not seem to cache any attributes not specified in the mapping file.

I don't think PropertyAccessor is what you are looking for. Although I don't have that much experience with hibernate but I don't see implementing a property accessor for each non persistent attribute as a solution.

You could try using the CacheManager and create your own cache. Although I don't have any other ideas I don't think is an elegant solution for our problem either :-( ...

Maybe I'm missing something here and there is an easy way to tell hibernate / ehcache to also cache transient attributes...

Good luck

Hmm, is this issue a weak point of Hibernate at all ?

UserTypes or an own CachingManager cannot be the solution.
Tylor's and my problem seems to be very trivial, but can not be solved with Hibernate ?

Hmm, am I really right ? :-(
Or just too blind to find a proper way ? ;-)