Craig Spry wrote:
Thanks for your feedback, I'll try and add the ability to add comments
to my site. I would also like to contribute this to somewhere where it
can be worked on by more than just me and isn't so hidden away. Can
anyone tell me where the best place to put this would be?
I'd love to see this in tacos, perhaps in a new subproject, tacos-cometd
BTW, how do you see this working in other servlet containers?
Thanks,
Craig
-----Original Message-----
From: Alejandro Scandroli [mailto:[EMAIL PROTECTED]
Sent: Tuesday, 5 June 2007 5:59 PM
To: Tapestry users
Subject: Re: Cometd Implimentation
Hi Craig
Nice component!.
I've tested it with 6.1.0 version of maven-jetty-plugin and It works
fine!
I'm testing it on linux and at first Tapestry complained about not
been able to find a template for the Cometd component, it was because
the html template name is lowercase. Once I changed that it worked.
Is there a way to let you comments directly on the site?
Saludos.
Alejandro.
On 6/5/07, Craig Spry <[EMAIL PROTECTED]> wrote:
Hello,
I've managed to get a very rough implementation of cometd working with
tapestry/jetty/dojo. I've implemented it as a component, you can get
the source from here:
http://www.spry.net.au/?q=node/10
To get the full effect open up 2 browsers and point them at the
webapp.
I'm putting this up for people to have a look at and it is by no way
production ready, so please don't expect it to scale, work reliably or
even work at all.
I have only run this using, using Sun's JDK 1.5.0_11 and Maven:
mvn jetty:run
So I don't know if it will work using other JSP containers or JDKs.
Now for the nitty gritty, from here on in I assume you know something
about cometd. To get this to work I have a function that is
listening,
when data needs to be pushed to the page, I get the sever to publish
an
event, on the client side the data is ignored and the function that is
listening calls the onclick() function of a component on the page,
which
does what ever you want.
I tried to send through rendered content to the listening function,
but
I couldn't work out how to get tapestry to genterate a response
without
a request.
To use this component in the .html file you will need a line that
looks
like this:
<span jwcid ="cometd" />
In the .page file:
<component id="cometd" type="Cometd">
<binding name="webapp" value="literal:cometchat"/>
<binding name="topic" value="literal:/pages/test"/>
<binding name="clickComponent" value="literal:clickMe"/>
</component>
Where webapp is the containing web application, the topic is what the
server will be publishing on and the pages will be listening and click
component is the id of the component that will be called by the
listening function, ie when a cometd event happens on topic
'/pages/test' clickMe.onclick() will be called on your web page.
I wouldn't recommend using what I have done to learn about cometd, to
do
this get the jetty source code from subversion and look at the
cometd-demo in the contrib directory.
Well there it is, take it for what it is and I'll keep posting
improvements to the above site as I make them I think there is plenty
of
room for improvements.
Craig
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