Re: [hibernate-dev] inSession / inTransaction
On Thu, Dec 20, 2018 at 1:33 PM Gunnar Morling <gunnar(a)hibernate.org> wrote:
Hey,
When discussing this before, there were some doubts about its actual
usefulness in non-testing, real-world code. E.g. you'd typically
interact with multiple DAOs/repositories etc. and would have to
somehow pass the session to each of them.
I've written many non-trivial apps in my past that did not use
"DAO/repositories" etc. Not sure why we'd choose to not implement
something that is useful just because not everyone would use it. To me, if
something is repeatedly useful in writing tests... it tends to be
more-or-less generally useful.
One other thought is that inTransaction() should allow to return a result
value.
An over-loaded form perhaps, yes I can see that - but non-returning is
valid as well. So maybe:
public interface SessionFactory ... {
...
void inSession(Consumer<Session> action);
void inTransaction(Consumer<Session> action);
void inTransaction(Session session, Consumer<Session> action);
<T> T inSession(Function<Session,T> action);
<T> T inTransaction(Function<Session,T> action);
<T> T inTransaction(Session session, Function<Session,T> action);
}
and
public interface Session ... {
void inTransaction(Consumer<Session> action);
<T> T inTransaction(Function<Session,T> action);
}