you can test ytalk http://test.movq.net/ytalk/
or look at the video http://www.youtube.com/watch?v=87BJYaF_cK4
and download the source
http://code.google.com/p/gae-services-examples/source/browse
best regards
Niklas
On Apr 2, 6:13 am, ryandscott <rscottf...@gmail.com> wrote:
> I'm wondering what the best way to implement a chat system would be.
> Currently, I have a javascript timer that goes off every x seconds to
> query the database and return the list of chats. I keep my list to a
> certain number of chats, but it seems that the way I'm doing the whole
> process is a fairly poor design.
>
> Here's basically how it goes:
>
> user.enterText(text)
> chats.append(text)
>
> every 5 seconds, Do:
> chat_list = chats.getChatsFromDB()
> display(chat_list)
>
> I'm wondering if there is a way to trigger an update only when a new
> chat is entered (by any user). Implementing a "push" system seems
> impossible because I can't really leave a request open. Is there
> something like that though that could do what I'm talking about?
>
> I've looked at the current chat programs that people have created in
> app engine, and they all seem to have a delay just like mine before
> the chat window is updated. I'm assuming they are using javascript to
> update, but without knowing the code I can't say for sure.
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