hi
I'm pretty unexperienced with Hibernate and I'm trying to understand how hibernate query cache really works. I have a persistent entity called Container which can have many Items. I wanted to have all the items cached:
Code:
@Cache(usage = CacheConcurrencyStrategy.READ_WRITE)
class Item {
// the code ...
}
class Container {
@Cache(usage = CacheConcurrencyStrategy.READ_WRITE)
public List<Item> getItems() { ... }
// rest of the code ...
}
The problem which I have noticed is that when I:
1) read some Containers from the db into memory (together with the corresponding items)
Code:
String hql =
"from Container c left join fetch c.items where c.type = 1";
List<Item> list = hibernateTemplate.find(hql);
2) insert new Item for a chosen Container
Code:
hibernateTemplate.save(item)
3) repeat the first step
then in the 3rd step I cannot see the item I have inserted in the second step.
The only way I have found to make it work was to manually clean the cache after inserting new items:
Code:
sessionFactory.evictCollection("Container.items", updatedContainerId)
My gut feeling tells me that Hibernate should do such a cache invalidation automatically. Has anyone seen it working? Am I doing something wrong or is it just not supported?
Thanks in advance for the answer.
Greetings
Tom
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