Comet A New Approach to Ajax Applications

What is Comet? Comet describes applications where the server keeps pushing data to the client, instead of having the browser keep polling the server for fresh content

Comet describes applications where the server keeps pushing data to the client, instead of having the browser keep polling the server for fresh content

When use comet? Single interaction updates are not enough User in the same ‘space’ need live update of: Their own changes The changes other make

Single interaction updates are not enough

User in the same ‘space’ need live update of:

Their own changes

The changes other make

Benefits Applications can deliver data to the client at any time, not only in response to user input The data is delivered over a single, previously-opened connection. Avoids HTTP & TCP/IP set-up and tear-down Reduces the latency for data delivery

Applications can deliver data to the client at any time, not only in response to user input

The data is delivered over a single, previously-opened connection.

Avoids HTTP & TCP/IP set-up and tear-down

Reduces the latency for data delivery

Who is using? GMail’s GTalk integration Jot Live Renkoo Meebo

GMail’s GTalk integration

Jot Live

Renkoo

Meebo

References http://alex.dojotoolkit.org/?p=545 http://ajaxian.com/archives/comet-a-new-approach-to-ajax-applications

http://alex.dojotoolkit.org/?p=545

http://ajaxian.com/archives/comet-a-new-approach-to-ajax-applications