Various businesses are increasingly using open source Java™ application servers. There are lots of them available to choose from, but how do you make the right decision? In this article, learn about a performance benchmark method for Java application servers, especially Java EE 5-compliant servers, that will help you choose the right solution.

You may know how to hide and display optional JavaServer Faces (JSF) components by using JavaScript and Cascading Style Sheets (CSS) in standard JSF components. To do this, you would first need to identify all JSF components and write them into JSF pages. But, that is impossible to do when you are developing a Web page that contains dynamic elements that are unknown until run time. With this article, learn how you can clear old UI components while automatically updating the dynamic elements of a Web page, as well as how to use Java™ code to add new elements and put them into their proper spot on a Web page. You'll also learn how to bind different event handlers to different dynamic elements of a Web page, how to register a listener listening to changes of server-side data to invoke a page refresh, and how to use Asynchronous JavaScript and XML (Ajax) techniques to refresh only the dynamic parts of the Web page.

The new range of advanced user interface (UI) applications requires some aspect of the "server-push" feature so clients can be notified immediately of any server-side changes. Unfortunately, the HTTP spec does not address the issue of any server-side initiated communication, so the server-push has traditionally been implemented through client-side polling. This technique tends to generate a lot of unnecessary traffic and non-optimized applications. Thankfully, certain Rich Internet Application (RIA) technologies do allow the opening of a dedicated socket channel, with the back-end server providing an opportunity for Asynchronous JavaScript and XML (Ajax) applications to piggyback on their APIs and implement a server push. This article explores this technique in a variety of ways, and helps you understand it well enough to begin your own implementation.

The authors offer a three pronged approach to providing secure transmission of high volume HTML traffic using CPU instructions and a novel RSA algorithm to significantly reduce costs.

Sinatra is a library that allows you to build almost any kind of web-based application in a very simple manner. When you code in Sinatra you’re bound only by HTTP and your Ruby knowledge. You'll obviously want to start building tiny web-applications and small services, and that's just what we'll do in this article. By the end of this article by Satish Talim, you'll be able to understand:
* what Sinatra is
* how to install Sinatra and its dependencies
* how to build a tiny web-application
* how to deploy the tiny web-app to Heroku

Explore the different implementations of developing with Comet. See how popular Java Web servers like Jetty and Tomcat have enabled Comet applications, and learn how to program with each server. And finally, learn about the standardization proposals for Comet in Java that are part of the upcoming Servlet 3.0 and JavaEE 6 specifications.

This article shows how to implement a Remote Procedure Call (RPC) mechanism for Web applications that use JavaScript on both servers and clients. You'll also learn several interesting techniques, such as implementing Java interfaces with JavaScript, building an XMLHttpRequest wrapper, making Ajax debugging easier, and using JSP tag files to generate JavaScript code.

Rich Internet Applications (RIAs) promise the dynamism and functionality of desktop applications through the browser. One of the key characteristics is moving your presentation layer to the client and backing it with a robust RESTful service layer on the server. This idea is being popularized with buzzwords like SOUI (Service Oriented User Interface) and SOFEA (Service Oriented Front End Architecture). In this article, the first of a two-part series, you will see how simple it is to create a Web service back end using Groovy's Grails Web application framework, and you will hook it up to an RIA developed with Adobe's Flex framework.

If Scala is a fully JVM-compatible language, then you should be able to use it in various "real-world" environments such as one in which you build servlets and other Web applications. In this article, the author explores using Scala in a servlet environment.

Combine JavaScript with Java™ code on the server to get the freedom to use the same JavaScript routines on both servers and clients. In addition, the techniques presented throughout this series will allow you to maintain a single code base for both Ajax and non-Ajax clients. Because much of the server-side code would still be written in the Java language, you'll find it necessary to expose the Java Platform, Enterprise Edition (Java EE) features to JavaScript. In this series, learn how to run JavaScript files on the server side, call remote JavaScript functions with Ajax, and use the Java Scripting API with the JavaServer Pages (JSP) technology.