- From: Jeremy Orlow <jorlow@chromium.org>
- Date: Thu, 10 Jun 2010 14:41:37 +0100
- To: Andrei Popescu <andreip@google.com>
- Cc: Mikeal Rogers <mikeal.rogers@gmail.com>, Webapps WG <public-webapps@w3.org>
- Message-ID: <AANLkTimu7SijKWe3KkRuu6WSEtQBwuIBOjy-c27bH_DV@mail.gmail.com>
Yes. Sorry for not being clear. On Thu, Jun 10, 2010 at 2:31 PM, Andrei Popescu <andreip@google.com> wrote: > On Thu, Jun 10, 2010 at 1:39 PM, Jeremy Orlow <jorlow@chromium.org> wrote: > > Splitting into its own thread since this isn't really connected to the > new > > Async interface and that thread is already pretty big. > > > > On Wed, Jun 9, 2010 at 10:36 PM, Mikeal Rogers <mikeal.rogers@gmail.com> > > wrote: > >> > >> I've been looking through the current spec and all the proposed changes. > >> > >> Great work. I'm going to be building a CouchDB compatible API on top > >> of IndexedDB that can support peer-to-peer replication without other > >> CouchDB instances. > >> > >> One of the things that will entail is a by-sequence index for all the > >> changes in a give "database" (in my case a database will be scoped to > >> more than one ObjectStore). In order to accomplish this I'll need to > >> keep the last known sequence around so that each new write can create > >> a new entry in the by-sequence index. The problem is that if another > >> tab/window writes to the database it'll increment that sequence and I > >> won't be notified so I would have to start every transaction with a > >> check on the sequence index for the last sequence which seems like a > >> lot of extra cursor calls. > > > > It would be a lot of extra calls, but I'm a bit hesitant to add much more > > API surface area to v1, and the fall back plan doesn't seem too > > unreasonable. > > > >> > >> What I really need is an event listener on an ObjectStore that fires > >> after a transaction is committed to the store but before the next > >> transaction is run that gives me information about the commits to the > >> ObjectStore. > >> > >> Thoughts? > > > > To do this, we could specify an > > IndexedDatabaseRequest.ontransactioncommitted event that would > > be guaranteed to fire after every commit and before we started the next > > transaction. I think that'd meet your needs and not add too much > additional > > surface area... What do others think? > >> > > It sounds reasonable but, to clarify, it seems to me that > 'ontransactioncommitted' can only be guaranteed to fire after every > commit and before the next transaction starts in the current window. > Other transactions may have already started in other windows. > > Andrei >
Received on Thursday, 10 June 2010 13:42:27 UTC