General Development Archive

Building Telephony Systems with OpenSER is a new book from Packt, which acts as a step-by-step guide to building a high performance Telephony System. Written by Flavio E. Goncalves, this book teaches users how to develop a fast and flexible SIP server using OpenSER, an open-source VoIP server based on the Session Initiation Protocol (SIP), an application-layer control (or signaling) protocol for creating, modifying, and terminating sessions with one or more participants, including internet telephone calls, multimedia distribution, and multimedia conferences. This book is a well illustrated, step-by-step guide to building a SIP based network using OpenSER.

InfoWorld's Tom Yager speaks in favor of the RTFM approach to learning new skills, arguing that the knowledge gleaned from cracking a manual only in search of a specific answer is eroding software quality. "The reason is that developers don't allow themselves the time to look things up before they use them. Statement completion, context-sensitive help, generated code, unit testing, and automated analysis came about expressly to eliminate research and experimentation from the development cycle. The result, I think, speaks for itself. How many rookie coding blunders that lead to security vulnerabilities grow out of inadequately understood usage of a method or resource?"

At their core, Web services define a mechanism for machine-to-machine interaction using a network and XML. A key component of a Web service is a formal description with Web Services Description Language. This article introduces you to REST and WSDL 2.0, and walks you through creating a WSDL 2.0 description of a REST Web service.

In this instalment of Automation for the people, automation expert Paul Duvall explains how you can use open source tools to automate the generation of Unified Modelling Language (UML) diagrams, build figures, entity-relationship diagrams (ERDs), and even user documentation.

RoughlyDrafted Magazine has posted an in-depth article that examines Sproutcore, an Apple-backed Javascript framework that approximates Cocoa on the web. The article examines why using HTML, Javascript, and CSS just may win the battle with Flash, Silverlight, and Java for rich internet application deployment. Sproutcore enables web developers to create full-featured cross-browser web apps an in a Model, View, Controller convention, much like Rails. The Sproutcore site has some great tutorials that show off the framework.

Peteris Krumins has written a three-part article series on his blog about using Bash effectively. The three parts are Editing commands in Emacs editing mode, Editing commands in Vi editing mode, and Definitive guide to Bash command line history. All three articles come with 'cheat sheets' in .pdf and .txt format so you can memorise the commands and shortcuts easier.

Computerworld is undertaking a series of investigations into the most widely-used programming languages. Previously they have spoken to Alfred v. Aho of AWK fame, and Chet Ramey about his experience maintaining Bash. In this article, they chat with S. Tucker Taft, Chairman and CTO of SofCheck. Taft has been heavily involved in the Ada 1995 and 2005 revisions, and still works with the language today as both a designer and user. Computerworld spoke to Taft to learn more about the development and maintenance of Ada.

Ars has just published part three in their series "From Win32 to Cocoa", in which Peter Bright explains why he thinks "Windows is dying, Windows applications suck, and Microsoft is too blinkered to fix any of it." Part one dealt with the history of both development platforms, part two dived into .Net, different types of programmers, and Windows Vista, and part three details the development platform and tools Apple has to offer, and in what ways they are superior or inferior to Windows'.

AWK is one of the most common UNIX tools to process text-based data in either files or datastreams. Written by Alfred Aho, Peter Weinberger, and Brian Kernighan, AWK "extensively uses the string datatype, associative arrays (that is, arrays indexed by key strings), and regular expressions." ComputerWorld interviewed Alfred Aho.

"The new version of F-Script provides syntax for dynamically creating Cocoa classes. This is great for quickly experimenting, prototyping and using Cocoa interactively. You can type a class definition in the F-script console, hit return and immediately start playing with your new class. This article provides a quick introduction to this easy-to-use and powerful feature. You can experiment with it right now by downloading F-Script 2.0 alpha 3 ."

Andrew Min gives a taster of the open source goodies being developed at Google's Summer of Code: a GUI for Aptitude, a GUI for Grub 2, search based menu browsing for GIMP and Audacity file import/export with FFmpeg amongst others. Read (or listen to) to the full article at Freesoftware Magazine

A few weeks ago, Ars published part one in a series called "From Win32 to Cocoa: a Windows user's conversion to Mac OS X". In this series, Peter Bright details why he believes "Windows is dying, Windows applications suck, and Microsoft is too blinkered to fix any of it". Part one dealt with the history of both Windows and the Mac OS, and part two deals with .Net, the different types of programmers, and Windows Vista.

Geek.com is running an opinion piece on the extensive reliance of programmers today on languages like Java and .NET. The author lambastes the performance penalties that are associated with running code inside virtualised environments, like Java's and .NET's. "It increases the compute burden on the CPU because in order to do something that should only require 1 million instructions (note that on modern CPUs 1 million instructions executes in about one two-thousandths (1/2000) of a second) now takes 200 million instructions. Literally. And while 200 million instructions can execute in about 1/10th of a second, it is still that much slower." The author poses an interesting challenge at the end of his piece - a challenge most OSNews readers will have already taken on. Note: Please note that many OSNews items now have a "read more" where the article in question is discussed in more detail.

Amanda developers released Amanda 2.6.0 today. This is a significant update to Amanda backup software with improvements in ease of installation and configuration, security, scalability and robustness. Amanda 2.6.0 is available for download (in both source and binary-package form) here. Update: Other interesting open source releases today: Inkscape 0.46, AbiWord 2.6.0 and Ardour 2.4.0.