The websocket protocol has been touted as a great leap forward for bidirectional web applications like chat, promising a new era of simple comet applications. Unfortunately there is no such thing as a silver bullet and this blog will walk through a simple chat room to see where websocket does and does not help with comet applications. In a websocket world, there is even more need for frameworks like cometd.[Read More]
Posted at 04:27AM Mar 02, 2010 by gregw in General | Comments[2]
Webinar on reliable messaging with Jetty, Cometd and ActiveMQ
Jan Bartel (Intalio) and Daan Van Santeen (Progress FUSE) will be giving a series of live webinars on how Jetty, Cometd and ActiveMQ can be used to provide a reliable messaging platform to the browser.[Read More]
Posted at 09:34AM Feb 11, 2010 by gregw in General | Comments[8]
There is a jurisdictional issue brewing over the future of internet standards. The dispute is between the WHATWG and the IETF regarding the specification process for the websocket protocol.[Read More]
Posted at 11:01AM Jan 31, 2010 by gregw in General | Comments[17]
Jetty-7.0.1 has been extended with a WebSocket server implementation based on the same scalable asynchronous IO infrastructure of Jetty and integrated into the Jetty Servlet container.
[Read More]Posted at 03:46PM Nov 24, 2009 by gregw in General | Comments[15]
The W3C has developed the Websocket API proposal for HTML5, that enables web pages to perform two-way communication with a remote host. There is also a proposed IETF draft websocket protocol to transport the websocket messages.
I believe that there are significant deficiencies in the proposed websocket protocol and this blog looks at how they can be rectified.
[Read More]Posted at 02:32PM Oct 20, 2009 by gregw in General | Comments[8]
Cometd Features and Extensions
The cometd project is nearing a 1.0 release and thus we are make a bit of a push to improve the project documentation. As part of this effort, we have realized that there are many cool features and extensions to cometd that have been under-publicized. So this blog is an attempt to give a whirlwind tour of cometd features and extensions.[Read More]
Posted at 04:16PM Jul 08, 2009 by gregw in General | Comments[2]
Bidirectional Web Transfer Protocol - BWTP
I really like the idea behind the HTML5 Websocket API - namely that a datagram model should be used for web application communication rather than a request/response paradigm (this is also the idea behind cometd). But unfortunately, the proposed protocol to carry websocket traffic is neither a good protocol nor is it well specified.[Read More]
Posted at 08:38PM Jul 01, 2009 by gregw in General | Comments[1]
Cometd Acknowledged Message Extension
With the release of the latest cometd-jetty in Jetty 6.1.15, the oft requested feature of reliable message delivery is now supported by the Acknowledged Message Extension in the jetty server and in the dojo and jquery clients... ... provide an acknowledged message mechanism for reliable message delivery.[Read More]
Posted at 06:54AM Mar 11, 2009 by gregw in General | Comments[1]
Mingfai Ma has created a grails cometd plugin that combines grails 1.1,
jetty-6.1 and cometd 6.1.12 to provide spring based grails application
environment.
[Read More]
Posted at 03:44PM Jan 30, 2009 by gregw in General | Comments[4]
Servlet 3.0 Public Review : Update
I have been working on an implementation of the Servlet-3.0 asynchronous servlets with some the fixes/extensions I suggested in my previous blog and from some continuing discussion within the EG. This implementation demonstrates that significant asynchronous behaviour can be implemented without the complexities of redispatching wrapped requests or the forward(path) methods.[Read More]
Posted at 03:33AM Dec 21, 2008 by gregw in General | Comments[3]
Scalable BlazeDS with async Jetty
Valery Silaev has pointed me to an article on flex.sys-con.com that demonstrates how the asynchronous features of Jetty have been used by Farata Systems to achieve some excellent scalability results with BlazeDS.
BlazeDS is an open source server side that provides comet style streaming events to a flex/flash client side (not strictly comet as it is not strictly ajax).
Posted at 04:09AM Oct 30, 2008 by gregw in General | Comments[0]
Jetty Improves in Netcraft survey (again)
Posted at 04:51PM Apr 11, 2008 by gregw in General | Comments[5]
Posted at 07:50PM Nov 22, 2007 by gregw in General | Comments[2]
So you're in a session at AjaxWorld and it's not rocking your world! Want to know where the real rockstars are talking? Want to know what sessions are going off? Then tune into
Rocks Or Not and rate sessions in real time and see what others think of the other session live.[Read More]
Posted at 11:59PM Sep 24, 2007 by gregw in General | Comments[2]
JSR-315: Servlet 3.0 Specification - part I
The Java Community process has proposed JSR-315 to consider the 3.0 servlet specification. In this blog entry, I look at the Async and Comet considerations listed in the JSR-315 and discuss how 3.0 servlets might address them.[Read More]
Posted at 08:02PM Jun 21, 2007 by gregw in General | Comments[0]
