cometd-users Google Group

Re: cometd + gwt, getting started

mar...@gmail.com (Mark) — Mon, 13 Oct 2008 03:45:49 UT

Hi Simon,

Sorry I might be confused on this - the link shows that you can use
Jetty with GWT to make remote procedure calls (I have this working,
it's great). But I want to use the Cometd chat implementation with GWT
-

If you wanted to use the Cometd chat implementation with raw
javascript, I guess you just run the jetty server, and then make the

Re: [cometd-users] Re: cometd + gwt, getting started

simone.bor...@gmail.com (Simone Bordet) — Sun, 12 Oct 2008 22:50:52 UT

Hi,
I am not sure I follow.
The link I gave does not mention the ContinuationCometdServlet, but
just uses GWT infrastructure (albeit modified) to allow for Comet
style communication.
So you just write your GWT service classes as before, just with a
different superclass.
Simon

Re: cometd + gwt, getting started

mar...@gmail.com (Mark) — Sun, 12 Oct 2008 22:33:22 UT

Hi Simone,

I followed that post and got GWT to work with Jetty continuations
after making the necessary changes to the GWT source.

After reading more on this, I guess my problem is that the Jetty
Cometd implementation exposes the ContinuationCometdServlet servlet
class, which uses the:

void service(HttpServletRequest request, HttpServletResponse

Re: [cometd-users] cometd + gwt, getting started

simone.bor...@gmail.com (Simone Bordet) — Sun, 12 Oct 2008 22:03:16 UT

Hi,
You may want to start here:
[link]
Also, about passing custom messages, you can use the Comet API to send
any message to your clients.
A chat message or a custom message is exactly the same for Comet, it
is not aware of the content of the message.
Simon

cometd + gwt, getting started

mar...@gmail.com (Mark) — Sat, 11 Oct 2008 22:52:57 UT

Hi,

I'm trying to get started with cometd and jetty. My goal was to use
GWT for the client side stuff, and jetty works well with it. I wanted
to use continuations for a chat server, but it seems like cometd
implements all this for us already.

Can we build applications on top of cometd, pass our own custom

Re: short client timeout

mingfai...@gmail.com (Mingfai) — Tue, 07 Oct 2008 08:57:32 UT

i just realize after a connect response, my client does not make another
long-pooling request again. it's probably the reason the server timeout my
client. anyway, this question better suit the dev list now. thx.

Re: [cometd-users] Publish messages from Server to all clients

geoffreyj....@gmail.com (Geoffrey Lee) — Tue, 07 Oct 2008 05:30:53 UT

Well, Bayeux works on a concept of channels, so the simplest way would be to
subscribe every client to the same channel, and then publish to it.
-Geoffrey Lee

Publish messages from Server to all clients

welld...@gmail.com (Damon) — Mon, 06 Oct 2008 19:17:48 UT

My apologies if this is discussed somewhere in detail, however after
searching and asking on the IRC channel, I haven't gotten an answer
yet.

I'm using the jetty impl of Bayeux with a custom app server and am
simply trying to have my server publish a message that will be sent to
all clients. Can anyone provide a suggested method for this? What are

short client timeout

mingfai...@gmail.com (Mingfai) — Mon, 06 Oct 2008 14:49:35 UT

hi,
I'm developing a YUI Cometd client and having fun with a Jetty Cometd
server. The implementation is so far quite smooth.
1. My server do authentication on Hashshake by the ext field. It seems to
be the best timing as connect is not mandatory, and it's no good to check
security on every request.

Re: [cometd-users] Re: making cometd-jetty more dependency injection friendly

mingfai...@gmail.com (Mingfai) — Wed, 01 Oct 2008 20:30:04 UT

ic. It seems better for me to directly use Bayeux API. Bayeux simplied the
usage a lot and it's good to use as a starting point, if possible.
As I need to study how the BayeuxService work anyway, I come back to you if
i have any good idea to improve.
btw, Cometd/Jetty has quite a number of concurrency libraries. e.g.

Re: [cometd-users] Re: cometd-jetty-6.1.12.rc2 requires jetty 7 util

mingfai...@gmail.com (Mingfai) — Wed, 01 Oct 2008 20:18:43 UT

ic. i didn't aware the jar in the jre1.5 directory. sorry about this.

Re: [cometd-users] cometd-jetty-6.1.12.rc2 requires jetty 7 util

gr...@mortbay.com (Greg Wilkins) — Wed, 01 Oct 2008 18:07:36 UT

Mingfai
the ArrayQueue class is in the util5 package of jetty-6.1.12.rc2
cometd works in rc2 out of the box for me.
cheers

Re: [cometd-users] making cometd-jetty more dependency injection friendly

gr...@mortbay.com (Greg Wilkins) — Wed, 01 Oct 2008 18:03:56 UT

Mingfai,
some quick comments.... and I'll give a more considered response later.
There is no requirement to use BayeuxService. It's just a conveniance class.
You can directly use the Bayeux API if you like.
Having said that, I'm happy to consider changes to the BayeuxService class
to make it more friendly.

making cometd-jetty more dependency injection friendly

mingfai...@gmail.com (Mingfai) — Wed, 01 Oct 2008 11:44:34 UT

hi,
when i'm trying to following the ChatDemo to implement my BayeuxService, I
found some problems when trying to use Spring to manage the instance. I
wonder if the BayeuxService could be refactored to be more dependency
injection friendly. The following are the specific issues:
1. requirement to extend the BayeuxService

Re: cometd-jetty-6.1.12.rc2 requires jetty 7 util

mingfai...@gmail.com (Mingfai) — Wed, 01 Oct 2008 10:50:53 UT

with further investigation, it actually requires the ArrayQueue in the
trunk, the jetty-util-7.0.0pre3.jar is not up-to-date. A problem is the
trunk and jetty-util.7.0.0.pre4 tags cannot be built right now as there are
failed test cases.