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From: "Christopher O'Connell" <jwriteclub@gmail.com>
Date: Mon, 9 Nov 2009 01:45:29 -0700
Message-ID: <81d01c0911090045p42e533eaq9d575f9e8203117f@mail.gmail.com>
Subject: Re: Update API
To: user@couchdb.apache.org
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Actually, I discovered that limit is only in trunk when testing externalJ.

I ended up using a hacky hack to only read 500 lines at a time and then
rewrite update seq to since+500. That way I can "chunk" it myself.

~ Christopher

On Sun, Nov 8, 2009 at 1:17 PM, Matt Goodall <matt.goodall@gmail.com> wrote:

> 2009/11/8 Christopher O'Connell <jwriteclub@gmail.com>:
> > Just as a quick aside on the changes API, as a couple of people helped me
> > figure out last night in the IRC channel, do be careful about grabbing
> the
> > canges API if its very large, as some JSON processing libraries take
> obscene
> > amounts of space to decode a JSON object that large.
> >
> > I don't think it's on the wiki, but limit=n works for _changes
>
> True for trunk but, sadly, not for the 0.10.x series.  A workaround is
> to use the continuous feed - each change arrives on its own line as a
> JSON object so memory use can stay nice and low.
>
> I do wonder about the implementation of limit a little, the default
> seems a little arbitrary ;-).
>
>    Limit = list_to_integer(couch_httpd:qs_value(Req, "limit",
> "1000000000000000")),
>
> Surely the limit should either default to infinite or something that
> the client might sensibly handle, say 1000?
>
> Note: there's also a new descending=(true|false) _changes arg in trunk
> too ... although I can't think of a usecase for it.
>
> - Matt
>
> >
> > ~ Christopher
> >
> > On Sun, Nov 8, 2009 at 12:08 PM, Matt Goodall <matt.goodall@gmail.com
> >wrote:
> >
> >> 2009/11/8 Andrew Melo <andrew.melo@gmail.com>:
> >> > Oh, I'm sorry, I think I misspoke. I was looking for the API that will
> >> > notify me when a new document is added to the database.
> >>
> >> I think this is what you're looking for:
> >>
> >> http://wiki.apache.org/couchdb/HTTP_database_API#Changes
> >>
> >> - Matt
> >>
> >> >
> >> > thanks,
> >> > Andrew
> >> >
> >> > On Sun, Nov 8, 2009 at 12:59 PM, Dave Ray <daveray@gmail.com> wrote:
> >> >> There's also a page on the Wiki here:
> >> >>
> >> >>
> >>
> http://wiki.apache.org/couchdb/How_to_intercept_document_updates_and_perform_additional_server-side_processing
> >> >>
> >> >> but I would trust the test suite more :)
> >> >>
> >> >> Dave
> >> >>
> >> >> On Sun, Nov 8, 2009 at 1:24 PM, Andrew Melo <andrew.melo@gmail.com>
> >> wrote:
> >> >>> On Sun, Nov 8, 2009 at 12:18 PM, Paul Davis <
> >> paul.joseph.davis@gmail.com> wrote:
> >> >>>> Andrew,
> >> >>>>
> >> >>>> Don't forget the Futon test suite. There's an update_documents.js
> test
> >> >>>> that is probably the most authoritative source of info on that. To
> my
> >> >>>> knowledge no one has started a wiki page.
> >> >>>>
> >> >>>> Paul
> >> >>>
> >> >>> Paul,
> >> >>>
> >> >>> Thanks for the pointer. I'll try and grok those files.
> >> >>>
> >> >>> Best regards,
> >> >>> Andrew
> >> >>>
> >> >>>
> >> >>>>
> >> >>>> On Sun, Nov 8, 2009 at 12:57 PM, Andrew Melo <
> andrew.melo@gmail.com>
> >> wrote:
> >> >>>>> Forgive me everyone, but my google-fu is having trouble finding
> the
> >> >>>>> documentation for the updates API for the newer version of Couch.
> Can
> >> >>>>> someone point me in the right direction?
> >> >>>>>
> >> >>>>> Thanks,
> >> >>>>> Melo
> >> >>>>> --
> >> >>>>>
> >> >>>>> --
> >> >>>>> Andrew Melo
> >> >>>>> Andrew.Melo@gmail.com
> >> >>>>>
> >> >>>>
> >> >>>
> >> >>>
> >> >>>
> >> >>> --
> >> >>>
> >> >>> --
> >> >>> Andrew Melo
> >> >>> Andrew.Melo@gmail.com
> >> >>>
> >> >>
> >> >
> >> >
> >> >
> >> > --
> >> >
> >> > --
> >> > Andrew Melo
> >> > Andrew.Melo@gmail.com
> >> >
> >>
> >
>

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