Arun Gupta, Miles to go ...: Arun Gupta's Weblog

Tuesday October 21, 2008

Comet @ Ajax World 2008 West

Jim and I presented on "Using Comet to create a Two-Player Web Game" at Ajax World 2008 West yesterday. The talk explained the basic concepts of Comet, showed how a Tic Tac Toe game can be easily created using code walkthrough and then talked about future directions. The slides are available here and the code can be downloaded here.

A similar sample that can be deployed on Rails and Grails is described here. It uses GlassFish's support for multiple dynamic languages and associated web frameworks.

One of the benefits of delivering first talk in the morning is the ability to attend different sessions during the day. Of the different sessions I particularly enjoyed listening Bill Scott on Crafting Rich Web Interfaces.The talk explained six principles of rich web interaction with set of design patterns and real world examples. The slides are available here. All other sessions were mostly product pitches with very little value for developers.

Here are some pictures from the show:

And a complete album is available at:

Technorati: conf ajaxworld comet glassfish

Posted by Arun Gupta in web2.0 | Comments[2]

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Thursday October 16, 2008

"Using Comet to Create a Two-Player Web Game" @ Ajax World

Jim and I are speaking at Ajax World next week on Using Comet to Create a Two-Player Web Game.

The session walks through the process of creating a Tic Tac Toe game that can be played over the Internet using Ajax and Comet. In the process, it explains the general Comet concepts using APIs specific to the GlassFish Application Server. It also highlights the multi-lingual capabilities of GlassFish v3 by deploying a similar application using Ruby-on-Rails.

Here is the list of other Sun sessions:

JSF and Ajax Past, Present and Future by Roger Kitain
Adding Animation and Media to Java Applications by Raghavan Srinivas

The complete schedule shows a list of all the sesssions.

Technorati: conf ajaxworld comet glassfish

Posted by Arun Gupta in web2.0 | Comments[5]

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Tuesday April 15, 2008

jMaki Webtop on GlassFish - Ajax World Keynote Video

jMaki Webtop is a light-weight Mashup Framework based on jMaki widgets. The webtop was demonstrated at Ajax World East 2008 keynote. The key features are:

Simple & easy to use (runs in browser)
Extensible (add your own widgets & gadgets)
Manageable (create users)
Persistent (Google Gears on the client, Database on the server)
Shared (read-only views can be shared with other users)

A 30-minute video of the Ajax World keynote session is available here and shows webtop in action :) The keynote deployed the webtop as a WAR file on GlassFish. A live PHP version of webtop is available at jmaki.com/webtop.

You can download the entire source code from the subversion repository and run it yourself.

Technorati: conf ajaxworld newyork glassfish jmaki

Posted by Arun Gupta in web2.0 | Comments[1]

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Friday March 21, 2008

Ajax World East 2008 - Day 2 Report

I delivered my Maki as an Ajax Mashup Framework talk and the slides are available here. Lots of attendees came by afterwards and told me that they enjoyed the demo. The talk showed how jMaki Webtop provides a lightweight mashup framework that runs in the browser. Here is a pictorial representation of the demo shown:

GlassFish jMaki Webtop

jMaki Webtop is basically a jMaki widget that can be embedded in a JSP or PHP page. This widget provides the framework for managing widgets and users, ability to persist the Webtop on client-side using Google Gears or server-side using backend database, layouts and other functionality. In JSP case, the widget uses JPA for performing all the CRUD operations with the back-end MySQL database. The resulting WAR file is deployed on GlassFish (can be any other Servlet container as well). If you are interested in a Java version of Webtop then the recommended path is:

Create services & widgets using NetBeans
Deploy them on GlassFish
jMaki webtop for widget deployment & customization

It really is an evolution of jMaki - using all the infrastructure that has built over 2 years. You can experience it yourself at jmaki.com/webtop which is running a PHP version of the app. See the coverage here. The code will be available soon!

I attended few more talks and took notes in some of them to share:

See below for notes from some of them.

Can we fix the Web ?

This was an early morning talk (7:30am) and I reached few minutes late. But it was basically talking about JavaScript vulnerabilities such as

Script injection
No difference between user & guest scripts
Scripts exempt from same-origin policy
No modularity (global access to everything on the page)

And also DOM vulnerability because every node in the tree has access to every other node. This lacks modularity and causes a potential security risk.
Doug recommended 3-step plan to fix the Web:

Safe JavaScript subset

JSLint.com provides a safe subset of JavaScript that removes all features that are unsafe or suspect such as no global vars or functions
Google Caja & Cajita provide a similar subet but they use transformation instead of validation

Minor browser improvements

Scripts are exempt from same-origin policy. This allows a dynamic <script> tag to make a GET request from a server. Instead use JSONRequest (part of json.org).
ES4 (the upcoming JavaScript standard) is not good enough because it maintains backwards compatibility and adds complexity.

Major browser improvements

Replace JavaScript & DOM in browsers. The approach is to start with JSLint and add safe features as required.
The Object Capability System (where objects are given explicit access to be used) needs to be enforced to make it secure.

In Doug's opinion, if the Web is not fixed then JavaFX, Silverlight & AIR (all vastly superior but lacking adoption) will displace the web.

The second talk was on Accelerate Ajax development with Appcelerator by Appcelerator CEO.

The talk started with a "not too long back" introduction of the technology space. Well, it started with 1991 and the timeline (and associated technology advances in that year) kept shuffling 1995, 1989, 2001 .... and so on. Jeff talked about how/why Tim Berners Lee invented WWW and covered a myriad of terms after that including but not limited to - Web 1.0, Netscape, Mosaic, marc Andreeeseen (sp?), Java, java Web Start, Applets, W3C, CGI, J2EE, JCP, C#, JBoss, SOA, JavaFX, Silverlight, AIR and many others. For a 50 minute talk, that was quite a long introduction.

After that introduction, he word "Ajax" was mentioned almost 30 minutes (8:51am to be precise) in the talk. And then the word "Appcelerator" was mentioned at 9:06am. Finally, I realized that I'm in the right talk ;)

Appcelerator like to pitch themselves as RIA + SOA company and allows true decoupling of the rich client from it's services. Their services is very similar to jMaki but they use event handling + Ajax + DHTML to achieve it. They also run on Ruby, PHP, Java and other languages.

All in all, it was a good walk through the memory lane!

The next one was REST & Ajax Reconciled.

The talk explained the basic concepts of REST - Resource, URI, Representation, URL & Methods (GET, PUT, POST & DELETE). It also explained the idempotency and safety of each method type. Overall a good decent introduction.

Then it explained the limitations with current web-based forms:

The URIs in the action attribute cannot be changed dynamically
Most browsers recognize only GET/POST methods
Limited ecodings - for example generating JSON encoding requires extra work.

It provided a REST framework checklist:

Does it have resource-based approach ?
Acknowledges existing of representation ?

need multiple of them

Solid engineering & community support ?

The three frameworks discussed in the talk were:

Apache Cocoon - based on XML pipelines & URL patterns, powerful but steep learning curve
RESTlet - Like Servlet for REST, good for existing model
Apache Sling - Based on JCR with server-side scripting support

The talk did not mention anything about Jersey which is turning out to be a great implementation and very well meets all the critieria mentioned above.

The speaker recommended Apache Sling with µjax for all REST + Ajax needs. But I'd strongly encourage you to have a look at Jersey. The JSON representation generated out of Jersey can now be directly consumed by jMaki as described here - a true combination of REST & Ajax :)

And then the last talk where I took notes is Understanding the Top Web 2.0 Attack Vectors. I'll provides notes from the last 5 slides of the talk which essentially captured the essence. These slides talked about fundamental issues with Ajax and described concerns and possible attacks in each issue. I'll need to understand some of these attacks better myself but at least I have a list to begin with :)

Here you go:

Client-side

Concerns

Transparency
Cross-domain communication
Exposed business logic (View Source)
Local & Offline data storage

Attacks

Cross-site scripting, DNS Rebinding
Business logic bypass
Variable tampering
Protocol hijacking
Function clobbering
JavaScript hijacking

Protocols

Concerns - new protocols on top of HTTP

SOAP
XML-RPC
REST

Attacks

Traditional

Man-in-the-middle

Spoofing

Recursive Payloads
Schema Poisoning

Information Sources

Concerns

Integrity
Transient
Diverse (RSS, Blogs, Email, ...)

Attacks

Untrusted content
Poisoned Cache (HTTP Response Splitting Vulnerability)
DNS Issues

Information Structure

Concerns - Variations of data structure

RSS
Atom
JSON
Serialized data

Attacks

Malicious injection
Parser implementations

Server-side Issues

Concerns

Architecture Weaknesses
Multiple languages & implementations
Increase & fragmented attack surfaces
Unknown request origin
Authorization & Authentication in complex environment

Attacks

Traditional

Information disclosure, Logical attributes, Denial-of-service
Command Injection

LDAP, SQL, XPath etc.

OpenAjax Alliance talk about Gadgets & Widgets was nice. The alliance is working on creating standards for widget metadata, communication across widgets and other similar tasks. The goal is to enable successful adoption of open and interoperable Ajax-based Web technologies.

Dave Ferraiolo (from OpenAjax) particularly expressed thanks to jMaki for deriving the first set of Open Ajax Data Model specs from jMaki data models.

That's it!

Check out some of the pictures:

The complete album is available at:

I had to leave at the end of Day 2 because of unfavorable health condition. But I'm glad at least I could deliver my talks :) Now I need to be back-in-shape before my upcoming trip next Tuesday!

Technorati: conf ajaxworld newyork glassfish netbeans ria sun web2.0 jmaki

Posted by Arun Gupta in web2.0 | Comments[2]

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Tuesday March 18, 2008

Ajax World East 2008 - Day 1 Report

Ajax World East 2008 started earlier today.

I delievered my "Web 2.0 Application development using jMaki" and the slides are available here. There were several demos shown in the talk (using NetBeans and GlassFish) and they are all accessible at the links mentiond below:

Several other related demos are available here. Luckily I could deliver without much hassle inspite of having a high fever and cough! I hope I can hold at least until tomorrow morning when the big preso is scheduled @ 11:35am.

Anyway I attended 3 more talks today and took notes to share:

See below for notes from each talk.

The first talk I attended was: Picking the Right Technology for Enterprise Rich Internet Applications. I got little late and the session was packed with attendees standing way outside the room so I joined them.

The session talked about AIR, Silverlight & JavaFX as three possible technologies for Enterprise RIA. Per the talk, here are the basic criteria for RIA tools requirement:

Seamless deployment on client
High penetration of runtime
Web browser independence
Fast client/server communication protocol
Robust security

Of course, this session was given in Ajax World so pros/cons of Ajax were dicussed:

Pros of Ajax	Cons of Ajax
No deployment required	Ajax apps are browser depdendent
100+ Frameworks	100+ Frameworks
Open Source, no need to purchase software license	Expensive due to long cycle, skilled developers demand top rate
	JavaScript is an interpreted language, entire source code can be viewed using "View Source"
	Network communication speed is not optimizedf for Ajax requests

And then basically it talked about the three technologies and their pros & cons are well captured in the slides.

The second session I attended was Performance Tuning your Ajax Applications. This was an interesting session and I learned a few tricks. Interstingly we have implemented quite a few of these performance enhancements in jMaki already.

Improving the performance of Ajax applications require tuning the following parameters:

Number of requests

Reduce number of JavaScript files that are loaded. This is the most important since each request to the backend adds extra cost. Even when the scripts are cached, the browser still makes a request (unless Since-Modified header is set correctly).
Typical approaches are to concatenate the files at dev time or at runtime based upon request.
Dev time approaches

Ant - concat all JS files using <concat> task
Dojo - Run Rhino over all provide/requires and then concatenate the files
Command-line

Run time approaches - Concatenation happens depending upon the request. Cons are:

Server-side dependent
Makes it harder to distribute code
Server is loaded as concatenation happens on server (mitigated with caching)
Works for <15 JS files
Does not track dependency

Size of requests

Remove white spaces and comments (Packer, Dojo, YCompresser, SafeCompress, ShrinkSafe are some of the tools)
Shorten the variable names
Gzip the code
Semicolon is optional but needed if you remove EOL (careful when compressing the code)

Drastically reduces the file size (e.g. Apache XAP reduced the file size from 330 kb to 70 kb)
Lots of gzip tools
Need to put appropriate headers so that browsers recognize gzipped content

Coding Style

Single line "if" and "for" do not need "{ }"
Combine var declarations into a single var such as var x=1, y = 2;
Use JavaScript style object

Time of requests
Time of initial code completion

Minimize the time that is executed @ start up
Bring the data once the initial page is loaded
Show images telling users that something is going on

Distracts user from the time it's taking

Other tips

Don't write your own parser - use the native parsers
"If" statement optimization
Use the native facilities like getElementById() or getElementByTagName()
Consider different approaches of DOM creation

Tail Recursion
Setting the value in innerHTML

Consider JSON over DOM for object graph traversal - JSON could be much faster

Similar tips can be used for CSS as well.

My third talk of the day was Performance Paradigm of a Mashup World.

This talk given by Vice President of Webmetrics and laid a special emphasis on "Collaborative Monitoring" for performance measuring any mashup. This process involves not only monitoring your own application, but also setting up agents that measure performance with other services being invoked in the mashup, their further partners and so on. It also talked about a layered approach of using:

Standard monitoring - HTML page load time, DNS request processing time, etc.
Pixel Mapping monitoring - required mainly for GUI intensive application
Web services monitoring - Used for partner monitoring

This was further clarified using a 6-step process:

Know your apps
Learn where the points are in your ecosystem
Measure your perspective
Monitor your APIs
Collaborate within your organization
Collaborate with your partners & customers

That's it!

Check out some of the pictures:

The expo hall opens tomorrow and Sun's booth is right between the ballroom and the main door to expo hall, can't miss us ;)

The complete album is available at:

The Internet connection at the Roosevelt hotel is painfully slow inspite of charging $14.95/night where as most of the "modern" hotels offer free wireless :(

Technorati: conf ajaxworld newyork glassfish netbeans ria sun web2.0 jmaki

Posted by Arun Gupta in web2.0 | Comments[1]

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Monday March 17, 2008

Ajax World New York 2008 - This Week

Sun Microsystems is a Gold sponsor of Ajax World East 2008. The event kick starts in New York City tomorrow and you can see the complete agenda here.

From Sun speakers, you'll hear how jMaki, GlassFish Comet, GlassFish and NetBeans provide an easy-to-use and industry-grade platform to develop and deploy Rich Internet Applications. Here is the list of Sun sessions:

Tuesday, Mar 18

RIA Approach for Web 2.0 Development using jMaki - Track 3 - 3:40 - 4:25pm

Wednesday, Mar 19

jMaki as an Ajax Mashup Framework - 11:30 - 12:05pm

Thursday, Mar 20

Asynchronous Ajax for Revlutionary Web Applications - Track 3 - 2:15 - 3:00pm

Building Scalable Ajax Applications using GlassFish Comet - Track 4 - 5:30 - 6:15pm

Here is my wish list of sessions that I'd like to attend:

Tuesday, Mar 18
Picking the Right Technology for Rich Internet Applications	Track 5	2:00 - 2:45pm
Ajax Applicability: When should Ajax be used ?	Track 2	2:50 - 3:35pm
RIA Approach for Web 2.0 Development using jMaki	Track 3	3:40 - 4:25pm
Wednesday, Mar 19
Opening Keynote: Can we fix the Web ?	Opening Keynote	7:30 - 8:20am
Think Fast: Accelerate Ajax Development with Appcelerator	Session 2	8:25 - 9:15am
REST and Ajax Reconciled	Track 6	9:20 - 10:05am
Enterprise Comet: Real-Time or Real-Time Web 2.0 ?	Session 4	11:00 - 11:30am
jMaki as an Ajax Mashup Framework	Session 5	11:35 - 12:05pm
Understanding the top Web 2.0 Attack Vectors	Track 3	12:10 - 12:55pm
Building Web 2.0 Applications with Project Zero	Track 3	2:05 - 2:50pm
Ajax and Social Computing for the Enterprise	Session 7	2:55 - 3:30pm
Aptana IDE: Your unfair advantage for Ajax etc.	Track 3	5:20 - 6:05pm
SYS-CON.TV Power Panel: The Business Value of RIAs	Session 10	6:10 - 6:55pm
Welcome Reception		6:30 - 8:30pm
Thursday Mar 20
RIA Adoption in 2008: Risks, Rewards, Challenges & Opportunity	Opening Keynote	8:00 - 8:50am
Ajax and Rails	Track 6	8:55 - 9:40am
Now Playing: Desktop Apps in the Browser	Session 3	9:45 - 10:15am
DreamFace: The Ultimate Framework for Creating Personalized Web 2.0 Mashups	Session 4	11:55 - 12:25pm
Securing Ajax Development and Testing	Track 6	12:30 - 1:15pm
Asynchronous Ajax for Revlutionary Web Applications	Track 3	2:15 - 3:00pm
Saving your Investment: Transforming J2EE Applications into Web 2.0 using GWT	Track 4	3:05 - 3:50pm
Building Scalable Ajax Applications using GlassFish Comet	Track 4	5:30 - 6:15pm
SYS-CON.TV Power Panel: What Lies Beyond AJAX?	Session 9	6:15 - 7:00pm

It's only a wish list cause I'll be spending time at Sun booth in the Expo Floor as well and this is New York City ;)

See ya there!

Technorati: conf sun ajaxworld jmaki glassfish mashups comet netbeans ria

Posted by Arun Gupta in web2.0 | Comments[1]

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Sunday March 16, 2008

Travel Schedule - Next 5 weeks

Here is my travel schedule for next 5 weeks:

Mar 17-21	Ajax World, New York	Web Application Development using jMaki
Mar 25-26	The Server Side Java Symposium, Las Vegas	Rails powered by GlassFish & jMaki
Mar 27	Developer Update, St Louis Westport DoubleTree, FREE event	Open Source Web Services stack in GlassFish
Mar 28	Developer Update, Kansas City, FREE event	Rich Internet Applications and GlassFish
Apr 16-19	FISL, Brazil	Web 2.0 Application Development using jMaki and Asynchronous Ajax for Revolutionary Web Applications

Stop by and say hello if you are present at any of the events. You'll hear about different GlassFish technologies:

How Metro provides enterprise-grade open source Web services stack for meeting all your needs
How jMaki allows you to create Rich Internet Applications
How Rails applications can be powered by GlassFish & jMaki
Asynchronous Ajax that allows you to scale your applications tremendously
And any other topic that you are interested in :)

Drop a comment if you are interested in a run or meal together ?

Technorati: conf glassfish metro webservices netbeans jmaki ajax newyork lasvegas stlouis kansascity brazil fisl ajaxworld tssjs

Posted by Arun Gupta in General | Comments[2]

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Thursday January 24, 2008

jMaki and Asynchronous Ajax @ Ajax World, New York 2008

The jMaki session at the upcoming Ajax World East 2008 is featured on Web2Journal.

Enjoy several jMaki screencasts before the talk :)

Jean-Francois is also speaking on Asynchronous Ajax for Revolutionary Web Applications - He is a great speaker and interesting topic too!

If you want to speak, the Call For Paper for Ajax World closes tomorrow (Jan 25, 2008).

Technorati: conf jmaki ajaxworld web2journal

Posted by Arun Gupta in web2.0 | Comments[0]

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Wednesday January 09, 2008

jMaki @ Ajax World, New York 2008

Sun Microsystems is a Gold sponsor of Ajax World 2008, New York City. I'll be speaking on Web Application Development using jMaki.

jMaki is a light-weight framework to create Rich Internet Applications using the best tools/libraries and standard practices. I plan to deliver the talk with lots of demos and hope you'll be able to correlate them with real-life scenarios easily. Of course, GlassFish provides a robust development environment for deploying these applications.

I liked the fact that they put my name/photo on the front page as shown below (kinda cool):

Ajax World 2008 Front Page

This is the first time it happened to me :)

If you have not registered yet, Register Today (before Jan 18) and save $200.

Find out more about the Products, Solutions, Free Developer Tools, Try and Buy and Other Cool Stuff for your next generation Web application (aka "Web 2.0") at developers.sun.com/web.

Technorati: conf jmaki glassfish ajaxworld

Posted by Arun Gupta in web2.0 | Comments[4]

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Friday March 23, 2007

Day 2 @ Ajax World - Part 2

Following from previous entry, I spent rest of my day at Sun pod showing various demos and talking to users. The evening was fun with a 2-hour cruise trip.

The boat was shaking a lot so I could not get any good pictures of the New York City skyline or Statue of Liberty. But it was nice spending time with other friends.

Technorati: ajaxworld sun swdp web2.0

Posted by Arun Gupta in web2.0 | Comments[0]

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Tuesday March 20, 2007

Day 2 at Ajax World

After spending the evening at Times Square yesterday, I rolled early in the bed to attend the morning keynote at 7:30am. And I had to run before that So I attended three sessions before the Expo Floor opened.

Like yesterday, the opening keynote, scheduled for 7:30am, started at 7:45am. I've a 10am flight tomorrow morning so with this consistent delayed start, I might have to miss the keynote tomorrow although I'd very much like to attend it.

Jeremy said even though folks have been using Ajax-like technologies for years but without Google Maps and GMail, we wouldn't be in this room, not so many and not so fired up. There were approximately 300 people for this 7:30am session. This is nothing compared to JavaOne keynote which typically has between 8000 to 12000 people in the keynote but the overall attendance of this conference itself is around 800. So in terms of percentage, it's still decent.

The opening keynote was by Bret Taylor who founded and led Google Maps. He showed 5 lines of code to integrate Google Maps in a website and another 8 lines of code to integrate Google Search. The point was that it is really easy to work with Ajax, especially as compared with SOAP/WSDL stack. Then he explained some of the techniques used behind Google Maps and GMail to solve some of the common problems of Ajax.

Per him, the main reason that triggered the explosive growth of Ajax is that most of the major browsers (IE, Firefox, Safari, Opera) agreed to deal with DOM, XHR, hash/anchor encoding and such similar techniques that enable Ajax in a consistent manner. He then explained how technology/browsers are evolving, on a daily basis, to make it a more pleasant experience.

The second session was "Inside the U.S. Air Force: How AJAX Is Improving Communications and Quality of Life" - a joint talk by Tony Tran & Peggy Rackstraw. Tony Tran, Vice President of Roundarch who build the employee portal for Air Force explained how Air Force is adopting Ajax/RIA. Tony showed samples, using before and after comparison of clicks and page refreshes, of how adding RIA to the Air Force portal increased productivity of the employees by making the website easier to use. After a good success in their first phase, they worked with Laszlo systems to solve their distributed email system (higher TCO, multiple email servers/domains, basic editing capabilities) and IM within the team and friends & families. Then Peggy from Laszlo Systems demoed "Deployed Life" which had initial problems with Firefox but then worked with IE. IM was cool because it allowed a drag-and-drop of pictures/videos from your local machine.

The third session was "Enterprise Ajax Using Java" by Greg Murray. The talk was about newly launched Sun Web Developer Pack and how jMaki provides an extensible framework to develop your Ajax applications. The talk was full of demos making it more real. I talk about SWDP and jMaki on my blog anyway, so won't dwell in details here. And now I'm sitting at Sun pod.

At Sun pod, we are showing jMaki Charting, Theming, Glue, Mashups along with other cool features, Grizzly Comet demo, Phobos CRUD generator, RESTful Web services API and lots of other stuff. All of these technologies are available in recently released Sun Web Developer Pack that can be run on top of GlassFish v2. Come by and talk to us.

Tonight is Ajax on Hudson and I'm looking forward to that.

Technorati: ajaxworld sun swdp glassfish grizzly comet jmaki web2.0

Posted by Arun Gupta in web2.0 | Comments[1]

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Monday March 19, 2007

Day 1 - Reporting from Ajax World

I arrived in New York City yesterday early morning to show Sun's offerings at Ajax World. The Roosevelt Hotel reservation desk was courteous to allow me a really early check in (7am). After spending day with family & friends yesterday, I attended the opening keynote by Douglas Crockford this morning. After 20 minutes of delay Jeremy Geelan of SYS-CON, chair of the show, opened it and highlighted that they are neither vendors nor developers and they are here to listen and share with the community. I think that was an interesting statement considering there are multiple players involved in the game.

Doug started with a show of hands asking questions about Ajax awareness and finally asked "Who knows what does Web 2.0 mean?". And there were around approx 10 hands showed up. This term "Web 2.0" is fuzzy and any attempt to version the world wide web seems irrational. At Sun, we refer to this fuzzy term as "Next Generation Web Application" that allow to develop Rich Internet Applications. But you'll see Sun using "Web 2.0" sometimes because of a general adoption of this term.

Sun Web Developer Pack is one such toolkit that provides binaries, tutorial, documentation, samples (including source) to build your next generation Web applications and deploy them on industry-grade containers such as GlassFish and Sun Java System Web Server and others.

Most of Doug's slides were saying just few words and then he was talking through them. He introduced Ajax, it's history, different attempts at Rich Internet Application development, JavaScript, security in Ajax applications, Ajax in mobile applications, and competition (Adobe's Apollo and Microsoft's WPF).

Even though the keynote started late, but it finished slightly before time allowing me to attend Real World Web 2.0 Comet-based Applications by Jean Francois. There he gave an overview of the problem solved by Comet, different approaches of Comet, Grizzly Comet in GlassFish, and how to write a Comet application using GlassFish. In summary, Grizzly Comet solves reduce the latency and load on server but there is no standard way to for Comet-based applications so there is no interoperability between implementations. Please stop by at Sun's booth if you are interested in seeing a demo or talk more about Sun's offerings in this space.

A complete glimpse of schedule is available here and Sun sessions are listed here.

As a side note, I find it weird that there is no free internet connectivity at Ajax World. Isn't the conference about sharing, community and connectivity ?

Technorati: ajaxworld sun swdp glassfish grizzly comet

Posted by Arun Gupta in web2.0 | Comments[3]

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