Hi guys
I've got a list of id's and have to extract the appropriate objects
from the datastore. I use JPA, so it's posible to use method
EntityManager.find(..) :
Key key = KeyFactory.createKey(SomeEntity.class.getSimpleName(),
someId);
SomeEntity se = em.find(SomeEntity.class, key);
A number of id's id about 100-200, the whole number of entries in the
table is also small (several hundreds). The question is - may be
better to use query instead of find method. I just afraid that each
find method invocation requires server-datastore communication when
query requries only one(is it right?). If so how to do this.
The query em.createQuery("SELECT e FROM SomeEntity e WHERE (id=1 OR
id=2 OR id=3)"); returns nothing for some reason.
Any thoughts?
Thanks Maxim
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