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Advanced Web Technology

Advance Web Technology

Web 2.0 Introduction and Concepts

Web 2.0 Introduction and Concepts
Web 2.0 Introduction and Concepts

What is Web 2.0?

  • It is Second generation of services available on the Web that lets people collaborate and share information online
  • O’Reilly Media and MediaLive International popularized the term
  • Google is now seen as the torch bearer of the term by the media
  • From a technology perspective Web 2.0 uses AJAX, Mashups and RSS predominantly
What is Web 2.0
What is Web 2.0

Web 2.0: Evolution Towards a Read/Write Platform:

Web 1.0 (1993-2003) Pretty much HTML pages viewed through a browser Web 2.0 (2003-beyond) Web pages, plus a lot of other “content” shared over the web, with more interactivity; more like an application than a “page”
“Read” Mode “Write” & Contribute
“Page” Primary Unit of content “Post / record”
“static” State “dynamic”
Web browser Viewed through… Browsers, RSS Readers, anything
“Client Server” Architecture “Web Services”
Web Coders Content Created by… Everyone
“geeks” Domain of… “mass amatuerization”
Web 1.0 Web 2.0
DoubleClick Google AdSense
Ofoto Flickr
Akamai BitTorrent
mp3.com Napster
Britannica Online Wikipedia
personal websites blogging
evite upcoming.org and EVDB
domain name speculation search engine optimization
page views cost per click
screen scraping web services
publishing participation
content management systems wikis
directories (taxonomy) tagging (“folksonomy”)
stickiness syndication

Web 2.0 Concepts

  • Web 2.0 can be described in three parts:
    • Rich Internet application (RIA) — defines the experience brought from desktop to browser whether it is from a graphical point of view or usability point of view.
    • Web-oriented architecture (WOA) — is a key piece in Web 2.0, which defines how Web 2.0 applications expose their functionality so that other applications can leverage and integrate the functionality providing a set of much richer applications. Examples are feeds, RSS, Web Services, mash-ups.
    • Social Web — defines how Web 2.0 tends to interact much more with the end user and make the end-user an integral part.

Web 3.0 (Not Exists)

  • Web 3.0 is one of the terms used to describe the evolutionary stage of the Web that follows Web 2.0.
  • Given that technical and social possibilities identified in this latter term are yet to be fully realized the nature of defining Web 3.0 is highly speculative.
  • In general it refers to aspects of the Internet which, though potentially possible, are not technically or practically feasible at this time.

Rich Internet Application Development

  • A rich Internet application (RIA) usometimes called an Installable Internet Application,
  • Is a Web application that has many of the characteristics of desktop application software,
  • Typically delivered by way of a site-specific browser,
  • A browser plug-in, an independent sandbox, extensive use of JavaScript, or a virtual machine.
  • Adobe Flash, JavaFX, and Microsoft Silverlight are currently the three most common platforms
Rich Internet Application Development
Rich Internet Application Development

AJAX

AJAX
AJAX
  • Ajax is not a technology in itself
  • Shorthand for Asynchronous JavaScript and XML
  • The term was first used by Adaptive Path only in Feb 2005
  • Removes the need to reload entire web page each time the user makes a change. Increase the web page’s interactivity, speed, and usability.
  • XML is used as the format for transferring data between the server and client. XML files may be created dynamically by some form of server-side scripting
  • The Ajax technique uses a combination of: XHTML and CSS, JavaScript, XMLHttpRequest /IFrame object

Read Also:

AJAX Frameworks

  • Prototype Library,
  • DWR JAVA AJAX Frameworks

List of Ajax frameworks

frameworks License
JQuery GPL and MIT
MooTools MIT
Prototype MIT
YUI Library BSD
ASP.NET AJAX Microsoft Public License
Spry framework (no longer) MIT
Dojo Toolkit modified BSD license or the Academic Free License
Ext JS GPLv3 or proprietary
Backbone.js MIT
AngularJS MIT

Frameworks in Java for server-side Ajax operations

1. Apache Wicket: An open-source Java server-centric framework supporting Ajax development
2. Ariba Web: An open-source framework with Reflection and Object-Relational mapping
3. Backbase: Enterprise Ajax for JSF
4. DWR Direct Web Remoting
5.Echo for Ajax servlets
6. Form Engine: A framework for easy creation of dynamic forms
7.Google Web Toolkit: A widget library with a Java to JavaScript compiler
8. Its Nat: A server-side Java framework focused on single-page interface applications
9. Jack Be: Enterprise Ajax framework
10. JSF: Java Server Faces
11. Open Xava: Model-driven framework for creating Ajax business applications
12.RAP: Eclipse Rich Ajax Platform
13. JBoss RichFaces, ICEfaces and Prime Faces: Open-source Ajax component libraries for Java Server Faces
14. Tersus: An open-source platform for developing rich web applications by visual programming
15. Vaadin: A server-side Java widget framework utilizing GWT
16. ZK: An open-source Java server + client fusion Ajax framework utilizing jQuery and XUL

Prototype Library

  • Prototype takes the complexity out of client-side web programming.
  • Built to solve real-world problems,
  • It adds useful extensions to the browser scripting environment and provides elegant APIs around the clumsy interfaces of Ajax and the Document Object Model
  • To learn how to use it just visit

DWR JAVA AJAX Framework

  • The DWR project was started by Joe Walker in 2004,
  • 1.0 released at 29 Aug 2005.
  • DWR, or Direct Web Remoting, is a Java open source library that helps developers write web sites that include Ajax technology.
  • It allows code in a web browser to use Java functions running on a web server as if those functions were within the browser.
  • It consists of two main parts:
    • Code to allow JavaScript to retrieve data from a servlet-based web server using Ajax principles.
    • A JavaScript library that makes it easier for the web site developer to dynamically update the web page with the retrieved data.

DWR features

  • DWR has a number of features like
    • Call batching,
    • Marshalling of virtually any data-structure between Java and Javascript (including binary file uploading and downloading),
    • Exception handling,
    • Advanced CSRF protection and
    • Deep integration with several Java server-side technologies like Spring and Guice.
DWR features
DWR features

Getting Started with DWR

  • http://directwebremoting.org/dwr/introduction/getting-started.html

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