c# - Can an exception during OnRelease cause a component to not be disposed correctly? -

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i've got following code wiring nhibernate isession in autofac asp.net application :

builder.registeradapter<isessionfactory, isession>(factory => factory.opensession())     .instanceperhttprequest()     .onactivated(activatedargs =>                  {                      var session = activatedargs.instance;                      session.begintransaction();                  })     .onrelease(session =>                {                    if (session.transaction != null && session.transaction.isactive)                    {                        try                        {                            session.transaction.commit();                        }                        catch(exception e)                        {                            session.transaction.rollback();                            throw;                        }                    }                });

will session disposed thrown exception in commit? correct usage of isession autofac?

no- throwing in dispose() isn't idea autofac. correct disposal of other component instances isn't guaranteed.

in general should avoided - wcf example has known , long-standing usability problem because connections throw during disposal. basic antipattern dispose() called because exception propagating. throwing further exception masks original 1

edit:

as thought experiment - let's supported using try/catch magic in autofac. happens if onrelease() throws 2 different components? can't propagate both exceptions. further - once exception has bubbled out of autofac, can catch it? of components servicing request have been released.

hope helps, nick.


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