On Mon, 2008-07-21 at 13:35 +0100, Paul Fremantle wrote: > Maybe it isn't different. I'm not an expert on the HTTP transport. > > In general, a keep-alive is transparent to the Synapse message flow - > it is effectively managed by the client and each request-response pair > is logically separate. A comet connection logically supports both in > and out messages in any order and something needs to indicate to the > transport which existing connection this message is going to. For > example, suppose you have 50 incoming connections, each of which is > looking for different stock quotes based on a filter, something needs > to decide which connections to send the MSFT quote down when it comes > in. I guess logically speaking, we need a unique to-address for each > open connection so that it can be addressed by a message. > > Paul >
Paul et al I have not studied Comet in details but it seems all it takes a stateful connection manager. We already have one for HttpClient 4.0 but it is based on classic (blocking) I/O. There are plans to start working on a NIO connection manager at some point of time. Oleg > On Mon, Jul 21, 2008 at 1:24 PM, Sanjiva Weerawarana > <[EMAIL PROTECTED]> wrote: > > On the server-side, why is Comet different from a keep-alive connection > > where we have to process multiple independent requests on the same socket > > connection? > > > > Sanjiva. > > > > Paul Fremantle wrote: > >> > >> Folks > >> > >> One of the things I am increasingly interested in is events and EDA, > >> and while Synapse already supports Atom, JMS, XMPP (tho not XMPP > >> pub/sub AFAIK), I think it might be interesting to think how you would > >> implement a Comet model > >> http://en.wikipedia.org/wiki/Comet_(programming) with Synapse. > >> > >> It seems to me that our NIO HTTP model is very suited in one way > >> (async), but I guess we'd probably need to do a lot of work to support > >> handling more than one message per connection because its not clear to > >> me how you would associate the messages with the connection. > >> > >> Thoughts? > >> > >> Paul > >> > >> > > > > -- > > Sanjiva Weerawarana, Ph.D. > > Founder & Director; Lanka Software Foundation; http://www.opensource.lk/ > > Founder, Chairman & CEO; WSO2, Inc.; http://www.wso2.com/ > > Member; Apache Software Foundation; http://www.apache.org/ > > Visiting Lecturer; University of Moratuwa; http://www.cse.mrt.ac.lk/ > > > > Blog: http://sanjiva.weerawarana.org/ > > > > --------------------------------------------------------------------- > > To unsubscribe, e-mail: [EMAIL PROTECTED] > > For additional commands, e-mail: [EMAIL PROTECTED] > > > > > > > --------------------------------------------------------------------- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
