Latest Articles

Seam Data Validation

by David Salter | May 2009 | Java Open Source Web Development

Seam can act as JSF backing beans and as the glue between our server-tier Session Beans and our web-tier JSF pages. Unfortunately, though, users could easily break our sample application by entering invalid data (for example, entering blank values or non-numeric values into the edit boxes). Seam provides validation tools to help us to make our application more robust and provide feedback to our users. In this article by David Salter, let's look at these tools.

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Notifications and Events in Nagios 3.0- part2

by Wojciech Kocjan | May 2009 | Linux Servers Networking & Telephony Open Source

This is the second part of the two part series by Wojciech Kocjan in which we have covered notifications and events in Nagios 3.0. The first part covered:

In this article, we will cover the following sub-topics:

  • External Commands
  • Event Handlers
  • Modifying Notifications
  • Adaptive Monitoring

 

Read Notifications and Events in Nagios 3.0- part2 in full

Developing Seam Applications

by David Salter | May 2009 | Java Open Source Web Development

In this article by David Salter, we are going to start learning how to develop applications using Seam, and we will see some of the features of Seam. We will learn the basic structure of a Seam application. We will see in practice how Seam Injection and Outjection work, and we will learn more about Seam components. We will also see exactly how Seam bridges the gap between the Web tier (using Java Server Faces) and the Server tier (using Enterprise Java Beans).

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Slider for Dynamic Applications using script.aculo.us (part 2)

by Sridhar Rao | May 2009 | AJAX PHP Web Development

A slider, according to the dictionary, stands for the one that slides. Yes, a slider in the web application context stands for holding and sliding values from a fixed given range, or even from an array of values. The slider is really useful and worthy in places where the user needs to slide through a lot of values and also the application needs to respond to those values and changes. In the first part we were introduced to types of Sliders and code usage for the slider. This is the second part of a two part article on the concept of sliders using script.aculo.us.

In this article by Sridhar Rao, we shall cover:

  • Code usage for the slider and options
  • Tips and tricks with the slider
  • Hands-on example with vertical and horizontal slider
Read Slider for Dynamic Applications using script.aculo.us (part 2) in full

Getting a Jump-Start with IronPython

by Darrell Hawley | May 2009 | Open Source

As a .NET developer, you’ve probably heard IronPython mentioned in a blog post or an article, but do you know what it is? IronPython is Microsoft’s implementation of the Python language. Python is known for readability and its’ proponents claim that applications written with Python are done faster, use fewer lines of code and are more maintainable than those written using more traditional languages. The great thing about IronPython is that you get the advantages of the language, while being able to leverage your knowledge of the .NET framework. In this article by Darrell Hawley, we will cover a few basic aspects of IronPython and use them to create a Windows Form.

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