Comet, Simplified, with the Jabbify Comet Service

Brian MoschelBrian MoschelJupiter IT

Overview

Why Why How It Why Comet?

Why Jabbify?

How It Works Demo Showcase

Why Comet?

• Web 2.0 Trends1. Time Spent on a Page

Why Comet?

• Web 2.0 Trends2. Half life of a Page’s Content

Why Comet?

• Demand for Comet is growing• Desktop apps moving to the web

• Chat• Real time updates• Real time updates• Don’t like to reload

• Ajax:2003::Comet:2009

What is Jabbify?

• Comet, simplified• No server• No setup• JavaScript API and GET requests• JavaScript API and GET requests

Why Jabbify?

Simple to use

Scale easilyScale easily

Rapid setup

Simple to usesynchronized (_continuations) {for(Iterator<Map.Entry <String, ArrayList<Continuation>>> iter =

_continuations.entrySet().iterator(); iter.hasNext();){Map.Entry<String, ArrayList<Continuation>> entry = iter.next();ArrayList<Continuation> continuations = entry.getValue();for(Continuation c : continuations){c.resume();

}}

_continuations.clear();}}

Jabbify.connect({name: this.username}, this.continue_to('after_connect'))after_connect: function(){Jabbify.send('vote','submit', {result: this.result})

}

vs

Scale easily

• Scaling comet >> Scaling traditional web applications

• Resource intensive• Jabbify is built to scale as usage grows

Rapid Setup<New id="cf" class="org.mortbay.jetty.plus.naming.Resource"><Arg>jms/connectionFactory</Arg><Arg>

<New class="org.apache.activemq.ActiveMQConnectionFactory">

<Arg>failover:(tcp://localhost:61616)?initialReconnectDelay=20&amp;maxReconnectDelay=900</Arg>

</New></Arg>

</New>

vs

<script language="javascript" type="text/javascript" src="jabbify.js"></script>

vs

Comet is complex• Client

– Transports (JSONP, Window.name, Flash, XHR, iframe)

• Server– Special server– Special server– Setup time– Learning curve

• Scaling– Resource consumption– Threading issues

Jabbify is simple• Client to Client Comet

– JavaScript API• Jabbify.send(“message”,”create”,{message: “hi there”});

• Server to Client Comet• Server to Client Comet– GET requests

• https://jabbify.com/message_push?key=123&type=message...

How It Works

Demo

Take Home Points

Comet is coming

Jabbify = easy Comet

Showcase

• Jabbify Simple Chat Client• Keyboard Demo• Chat.unwrongest.com