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Re: IndexedDB TPAC agenda

From: Jonas Sicking <jonas@sicking.cc>
Date: Tue, 2 Nov 2010 12:15:43 +0100
Message-ID: <AANLkTinBFxCnbB22tUgD==BLcd73oyxjFms4pttDS2Dh@mail.gmail.com>
To: Jeremy Orlow <jorlow@chromium.org>
Cc: Pablo Castro <Pablo.Castro@microsoft.com>, "public-webapps@w3.org" <public-webapps@w3.org>
I suspect internationalization is another thing where we can quickly
make progress so lets try to get to that one too.

/ Jonas

On Tue, Nov 2, 2010 at 11:58 AM, Jeremy Orlow <jorlow@chromium.org> wrote:
> Great list!
> I propose we start with the various keys issues (I think we can make a lot
> of progress quickly and it's somewhat fresh on our minds), go to dynamic
> transactions (mainly are we going to support them), and then go from there.
> J
>
> On Tue, Nov 2, 2010 at 10:48 AM, Pablo Castro <Pablo.Castro@microsoft.com>
> wrote:
>>
>> To hit the ground running on this, here is a consolidated list of issues
>> coming both from the thread below and various pending bugs/discussions we've
>> had. I picked an arbitrary order and grouping, feel free to tweak in any
>> way.
>>
>> - keys (arrays as keys, compound keys, general keypath restrictions)
>> - index keys (arrays as keys, empty values, general keypath restrictions)
>> - internationalization (collation specification, collation algorithm)
>> - quotas (how do apps request more storage, is there a temp/permanent
>> distinction?)
>> - error handling (propagation, relationship to window.error, db scoped
>> event handlers, errors vs return empty values)
>> - blobs (be explicit about behavior of blobs in indexeddb objects)
>> - transactions error modes (abort-on-unwind in error conditions; what
>> happens when user leaves the page with pending transactions?)
>> - transactions isolation/concurrent aspects
>> - transactions scopes (dynamic support)
>> - synchronous api
>>
>> Thanks
>> -pablo
>>
>> -----Original Message-----
>> From: public-webapps-request@w3.org [mailto:public-webapps-request@w3.org]
>> On Behalf Of Pablo Castro
>> Sent: Monday, November 01, 2010 10:39 PM
>> To: Jeremy Orlow; Jonas Sicking
>> Cc: public-webapps@w3.org
>> Subject: RE: IndexedDB TPAC agenda
>>
>> A few other items to add to the list to discuss tomorrow:
>>
>> - Blobs support: have we discussed explicitly how things work when an
>> object has a blob (file, array, etc.) as one of its properties?
>> - Close on collation and international support
>> - How do applications request that they need more storage? And related to
>> this, at some point we discussed temporary vs permanent stores. Close on the
>> whole story of how space is managed.
>> - Database-wide exception handlers
>>
>> Looking forward to the discussion tomorrow.
>>
>> -pablo
>>
>>
>> From: public-webapps-request@w3.org [mailto:public-webapps-request@w3.org]
>> On Behalf Of Jeremy Orlow
>> Sent: Monday, November 01, 2010 1:34 PM
>> To: Jonas Sicking
>> Cc: public-webapps@w3.org
>> Subject: Re: IndexedDB TPAC agenda
>>
>> On Mon, Nov 1, 2010 at 12:23 PM, Jonas Sicking <jonas@sicking.cc> wrote:
>> On Mon, Nov 1, 2010 at 5:13 AM, Jeremy Orlow <jorlow@chromium.org> wrote:
>> > On Mon, Nov 1, 2010 at 11:53 AM, Jonas Sicking <jonas@sicking.cc> wrote:
>> >>
>> >> On Mon, Nov 1, 2010 at 4:40 AM, Jeremy Orlow <jorlow@chromium.org>
>> >> wrote:
>> >> > What items should we try to cover during the f2f?
>> >> > On Mon, Nov 1, 2010 at 11:08 AM, Jonas Sicking <jonas@sicking.cc>
>> >> > wrote:
>> >> >>
>> >> >> > P.S. I'm happy to discuss all of this f2f tomorrow rather than
>> >> >> > over
>> >> >> > email
>> >> >> > now.
>> >> >>
>> >> >> Speaking of which, would be great to have an agenda. Some of the
>> >> >> bigger items are:
>> >> >>
>> >> >> * Dynamic transactions
>> >> >> * Arrays-as-keys
>> >> >> * Arrays and indexes (what to do if the keyPath for an index
>> >> >> evaluates
>> >> >> to an array)
>> >> >> * Synchronous API
>> >> >
>> >> > * Compound keys.
>> >> > * What should be allowed in a keyPath.
>> >>
>> >> Aren't "compound keys" same as "arrays-as-keys"?
>> >
>> > Sorry, I meant to say compound indexes.
>> > We've talked about using indexes in many different ways--including
>> > compound
>> > indexes and allowing keys to include indexes.  I assumed you meant the
>> > latter....?
>> I'm lost as to what you're saying here. Could you elaborate? Are you
>> saying "index" when you mean "array" anywhere?
>>
>> oops.  Yes, I meant to say: "We've talked about using arrays in many
>> different ways--including compound indexes and allowing keys to include
>> arrays.  I assumed you meant the latter....?"
>>
>> >> * What should happen if an index's keyPath points to a property which
>> >> doesn't exist or which isn't a valid key-value? (same general topic as
>> >> "arrays and indexes" above)
>> >
>> > We've talked about this several times.  It'd be great to settle on
>> > something
>> > once and for all.
>> Agreed.
>>
>> >> * What happens if the user leaves a page in the middle of a
>> >> transaction? (this might be nice to tackle since there'll be lots of
>> >> relevant people in the room)
>> >
>> > I'm pretty sure this is simple: if there's an onsuccess/onerror handler
>> > that
>> > has not yet fired (or we're in the middle of firing), then you abort the
>> > transaction.  If not, the behavior is undefined (because there's no way
>> > the
>> > app could have observed the difference anyway).  The aborting behavior
>> > is
>> > necessary since the user could have planned to execute additional
>> > commands
>> > atomically in the handler.
>> There is also the option to let the transaction finish. They should be
>> short-lived so it shouldn't be too bad.
>>
>> I.e. keep the page alive for a bit longer in the background or something
>> that blocks page unload?  Is there precedent for this elsewhere?  This
>> sounds pretty complicated to get right both in terms of implementation and
>> speccing.  Let's chat about it though.
>>
>> >> * Error handling
>> >
>> > What do you mean by this?
>> How to handle exceptions in various places. Where (error) events
>> propagate. How does it relate to window.onerror. What happens if you
>> do/don't call preventDefault on the error event?
>>
>>
>> Sounds good.
>>
>>
>
>
Received on Tuesday, 2 November 2010 11:16:45 GMT

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