The Opera browser is working well with the CometD JavaScript library. However, recently a problem was reported by the BlastChat guys: with Opera, long-polling requests were strangely disconnecting and immediately reconnecting. This problem was only happening if the long poll request was held by the CometD server for the whole Read more
Slightly more than one year has passed since the last CometD 2 benchmarks, and more than three years since the CometD 1 benchmark. During this year we have done a lot of work on CometD, both by adding features and by continuously improving performance and stability to make it faster Read more
I have done some very rough preliminary benchmarks on the latest cometd-2.4.0-SNAPSHOT with the latest Jetty-7.5.0-SNAPSHOT and the results are rather impressive. The features that these two releases have added are: Optimised Jetty NIO with latest JVMs and JITs considered. Latest websocket draft implemented and optimised. Websocket client implemented. Jackson Read more
It all started when my colleague Joakim showed me the results of some JSON libraries benchmarks he was doing, which showed Jackson to be the clear winner among many libraries. So I decided that for the upcoming CometD 2.4.0 release it would have been good to make CometD independent of Read more
In the last blog entry I talked about message flow control using CometD‘s lazy channels. Now I want to show how it is possible to achieve a similar flow control using specialized listeners that allow to manipulate the ServerSession message queue. The ServerSession message queue is a data structure that Read more
The Codemotion conference slides of my talk on Comet and WebSocket web applications are available here: slideshare, download.
In the CometD introduction post, I explained how the CometD project provides a solution for writing low-latency server-side event-driven web applications. Examples of this kind of applications are financial applications that provide stock quote price updates, or online games, or position tracking systems for fast moving objects (think a motorbike Read more
The CometD project provides tools to write server-side event-driven web applications. This kind of web application is becoming more popular, thanks to the fact that browsers have become truly powerful (JavaScript performance problems are now a relic of the past) and are widely deployed, so they are a very good Read more
CometD 2.1.1 has been released. This is a minor bug fix release that updates the JavaScript toolkits to Dojo 1.6.0 and jQuery 1.5.1, and Jetty to 7.3.1 and 6.1.26. Enjoy !
A year ago I wrote an article asking Is WebSocket Chat Simple?, where I highlighted the deficiencies of this much touted protocol for implementing simple comet applications like chat. After a year of intense debate there have been many changes and there are new drafts of both the WebSocket protocol Read more