- From: Jeremy Orlow <jorlow@chromium.org>
- Date: Wed, 19 May 2010 13:07:58 +0100
- To: Jonas Sicking <jonas@sicking.cc>
- Cc: Nikunj Mehta <nikunj@o-micron.com>, Shawn Wilsher <sdwilsh@mozilla.com>, public-webapps WG <public-webapps@w3.org>
- Message-ID: <AANLkTilRtcdohFl_a3_Hm9qGStWq8TywfYWGYz630NMa@mail.gmail.com>
On Tue, May 18, 2010 at 11:31 PM, Jonas Sicking <jonas@sicking.cc> wrote: > On Tue, May 18, 2010 at 2:57 PM, Nikunj Mehta <nikunj@o-micron.com> wrote: > > > > On May 18, 2010, at 2:33 PM, Jeremy Orlow wrote: > > > > On Tue, May 18, 2010 at 9:36 PM, Shawn Wilsher <sdwilsh@mozilla.com> > wrote: > >> > >> On 5/18/2010 1:02 PM, Nikunj Mehta wrote: > >>> > >>> A database connection that locks the entire database cannot be opened > if > >>> there is another database connection that locks at least one database > >>> object, e.g., an index or object store. > >> > >> So basically, as long as some connection holds a database lock, you > won't > >> be able to do any upgrade. > > > > Sure, but this is true of Jonas' proposal as well. > > > > But to me it is a no-op. The spec already does what Jonas is proposing - > > lock out users when an upgrade is in progress and wait to start an > upgrade > > if a user is using the application. > > Note that in our proposal, having a database open does not hold any > locks. It simply holds metadata (such as objectStore and index names) > in memory. It is totally ok for the application to open the database > when the user initially loads the page, and never close it until the > user leaves the page. > > In fact, I would encourage users to do this since it allows for > reading data using a single level asynchronous callbacks, and so makes > for very readable code. > > Because our proposal is incompatible with the versioning mechanism > that the spec uses, I would propose that we first decide on if > mozillas proposal should be accepted before we decide on what > versioning mechanism we should use. > Agreed. Let's table this for now. Nikunj, can you please look at the "[IndexDB] Proposal for async API changes" thread? Thanks, Jeremy
Received on Wednesday, 19 May 2010 12:08:49 UTC