Latest Articles

Class-less Objects in JavaScript

by Stoyan Stefanov | October 2008 | AJAX Web Development

Java and JavaScript are very different languages, although the similarity in the names and the similar C-like syntax can confuse people sometimes. In this article by Stoyan Stefanov, let's take a look at one pretty major difference - how objects are created. In Java, you have classes. Then objects, a.k.a. instances, are created based on those classes. In JavaScript, there are no classes and objects are more like hash tables of key-value pairs. Then what about inheritance? OK, one step at a time.

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How to Recover from an Active Directory Failure

by Florian Rommel | October 2008 | .NET Architecture & Analysis Microsoft Networking & Telephony

Active Directory (AD) failure, which includes corruption, is something that is dreaded by any administrator. Simply put, it means that the directory service can no longer read the Active Directory database that it has locally. This will prevent logon and authentication as well as any directory-dependent services. Essentially, it renders the domain controller (DC) useless. What's worse, though, is that several times, the replication keeps going so that the corrupted database spreads out to the other DCs.

In this article by Florian Rommel, we will look at the different options and approaches available to recover a DC that has a database corruption. In addition, this article outlines, symptoms, causes, and solutions for this scenario.

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Modeling Orchestration and Choreography in Service Oriented Architecture

by Michael Havey | October 2008 | Architecture & Analysis BPEL Cookbooks SOA Web Services Java Oracle

So far, the general approach towards SOA has been that it is just a tidying-up of application integration. SOA, according to this approach, is not about building new a business functionality but about organizing existing systems. In this article by Michael Havey, we will see that, in reality, SOA is more than merely getting organized. Its principal mandate is to build something new; indeed, SOA is fundamentally about building new processes. We will consider an approach to SOA architecture that is, yes, methodical, but has the burden of actually designing new and challenging orchestration and ESB processes.

In this article, we will build examples of choreography and orchestration, study best practices for message handling in orchestration processes, and develop fundamental orchestration concepts, such as interaction, invisible hub, and deferred choice.

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Front Page Customization in Moodle

by Alex Büchner | September 2008 | Moodle Content Management Open Source

In this article by Alex Buchner, you would learn how to customize the front page of your Moodle site. Before taking an insight into this, let's first take a general overview of Moodle's look and feel elements.

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CUPS: How to Manage Multiple Printers

by Ankur Shah | September 2008 | Open Source

In this article by Ankur Shah, you will see how to manage multiple printers at a time. Unlike other printing systems, CUPS features a way to let you select a group of printers to print a job instead of selecting just one. In that way, if one printer is busy or down, another printer can be automatically selected to perform the job. Such groupings of printers are called printer classes.

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