solprovider apache.org schrieb:
> On 3/22/08, Andreas Hartmann <andreasapache.org> wrote:
>> solproviderapache.org schrieb:
>>> On 3/21/08, Andreas Hartmann <andreasapache.org> wrote:
>> >> everytime the meta data tab is
requested, a continuation is created.
>> >> Even if you modify and save the meta
data, another continuation is
>> >> created, because the screen is displayed
again. This behaviour
>> >> unnecessarily increases memory
consumption.
>> >>
>> >> I see two options to avoid the problem:
>> >> 1. Don't create continuations
>> >> 2. Separate "modify meta-data"
usecase
>> > My vote would be for #1 because I have
psychoses about locking systems
>> > and limited-duration server-based data
storage.
>> If we submit only a single value (e.g. using AJAX
or by comparing old
>> and new values), #1 might be OK. Mabye we could
send the original value
>> together with the new value so that the server can
check for concurrent
>> changes and output a warning (avoid read-write
conflicts) without
>> server-side locking.
>> > If using #2, do not add clicks. AJAX needs
neither the submit button
>> > nor "edit" links. Just use
onChange() and similar events to trigger
>> > the sendInformation().
>> Won't that generate a lot of traffic? Or is it easy
to add a timer which
>> submits only if no change happened e.g. for 1
second? Personally, I
>> don't mind to add at least a "Save"
button. Hitting the return key
>> should also work.
>
> Normal overhead is one POST request containing all
fields. AJAX
> overhead is a POST request containing one field and its
old value for
> each change.
My question was rather related to the onChange() listeners:
I'd expect a
POST request to be sent for each typed character. But I
guess this could
be solved using timers etc.
Thanks for elaborating!
-- Andreas
--
Andreas Hartmann, CTO
BeCompany GmbH
http://www.becompany.ch
Tel.: +41 (0) 43 818 57 01
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