How to Perform dynamic load balancing in Glassfish application server?

GlassFish is a fully Java EE 5-compliant application server with enterprise-ready features available under two OSI-approved licenses. Among many other enterprise-level features, GlassFish provides a very good self-management functionality extendable using the Java Management eXtension (JMX) standard.The GlassFish application server provides good facilities for cluster management and load balancing. Still, sometimes we need to have …

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EARs, WARs, JARs, and Java EE

A Java EE application may contain one or more Java EE components such as EJBs, Web modules, resource adapters, or J2EE application client modules. Each Java EE component can have an associated deployment descriptor — an XML file that describes the component. Java enterprise components are deployed using the Java Archive (JAR) file format, which …

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Servlet and JSP performance tuning

This article describes performance-tuning techniques (PTT) for developing high performance and scalable JSP (JavaServer Pages) pages and servlets. That means building applications that are reasonably and consistently fast, and can scale up to the increasing number of users and/or requests. In this article, I walk you through the practical and proven performance-tuning techniques that will …

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Spaghetti Code

One always guesses every one knows what a Spaghetti code is – a code which is hard to understand and maintain, a code which everyone is so scared to touch that bug fixes are always quick and dirty, and which makes code further spaghettier. I wonder has anyone thought about spaghetti products. It may not …

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What is the difference between an application server and a Web server?

What is the difference between an application server and a Web server? Taking a big step back, a Web server serves pages for viewing in a Web browser, while an application server provides methods that client applications can call. A little more precisely, you can say that: A Web server exclusively handles HTTP requests, whereas …

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Representational State Tranfer (RESTfull) Web Services

To Develop a stateless web services there is a Software architecture pattern called as REPRESENTATIONAL STATE TRANSFER(REST).This pattern can used in any Distributed Framework, as this is a simple protocol for data transmission and doesn’t require any other additional data transfer rule.REST can be used with the only HTTP protocol.Each service is viewed as resouce …

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Featuring : STRUTS 2.0 Features

Featuring : STRUTS 2.0 Features

Since STRUTS Framework has been released officially, every java developer thinks STRUTS is the simple framework to implement. Since last two years many new framework coming to market to compete STRUTS, so the popularity of struts framework becoming obsolete. Lack of updation of Struts Framework and due to new trends coming in Web development such …

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Creating a Build File from Sratch using Ant Script

Creating a Build File from Sratch using Ant Script

Introduction: This is an introductory tutorial to the Ant build tool, a free tool under GNU License and is available at http://jakarta.apache.org/ant/. Ant allows the developer to automate the repeated process involved in the development of J2EE application. Developers can easily write the script to automate the build process like compilation, archiving and deployment. It …

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New Spice in Java 6 – Features

New Spice in Java 6 – Features

Java technology is both a high-level, object-oriented programming language and a software platform. Java technology is based on the concept of a Java Virtual Machine (JVM) — a translator between the language and the underlying software and hardware. All implementations of the platform emulate the JVM, enabling Java programs to run on any system with …

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JAX-WS based Web Services using Java WSDP

JAX-WS based Web Services using Java WSDP

After working on web services using JAX-RPC, I shifted my attention to another web service standard for Java – JAX-WS (Java API for XML based web services). It is a successor to JAX-RPC 1.1, and obviously, it enjoys some advantages over its predecessor. The major differences between the two standards are: JAX-WS supports SOAP 1.2, …

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Introduction to Java Server Faces

Introduction to Java Server Faces

IntroducionJava Server Faces (JSF) simplifies the development of User Interfaces in a typical Web application. It provides a Component-based Pluggable Architecture for developing and representing User Interface Components. Also bundled with JSF is a whole set of various new features like Event Handling Mechanism, Page Navigation, Input Validation and Conversion. This article provides an overview …

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Servlets and JSP Pages Best Practices

Servlets and JSP Pages Best Practices

Java Servlet technology and JavaServer Pages (JSP pages) are server-side technologies that have dominated the server-side Java technology market; they’ve become the standard way to develop commercial web applications. Java developers love these technologies for myriad reasons, including: the technologies are fairly easy to learn, and they bring the Write Once, Run Anywhere paradigm to …

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What’s New in Java Servlet API 2.2?

What’s New in Java Servlet API 2.2?

This article describes what’s new in version 2.2 of the API, explains the decision-making process behind the changes, and demonstrates how to write servlets using API 2.2 features. To keep the article somewhere near a reasonable length, I’m going to assume that you’re familiar with the classes and methods of previous versions of the Java …

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