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We can visualize resource starvation using an elaborate rendition of the Dining Philosophers Problem. This classic metaphor of resource allocation among processes was first introduced in 1971 by Edsger Dijkstra in his paper "Hierarchical Ordering of Sequential Processes." It's been a model and universal method for verifying theories on resource allocation ever since. The metaphor goes like this: There are three well-known philosophers in an Asian bistro. Dinner is served but they are only given three chopsticks because the restaurant's supply truck has been stuck in a snow storm for a couple of days. Naturally each philosopher needs two chopsticks to eat his dinner and each is protected from interference while he uses a chopstick. Plato skipped lunch that day and insists that he should have priority or else he'll faint. If he doesn't give up his chopsticks, the other ... (more)

Enterprise Development: Flex or HTML5?

This article is a transcript from a recorded conversation Yakov Fain had with Anatole Tartakovsky and Victor Rasputnis – his business partners at Farata Systems. This conversation took place on the mountain after the day of skiing. Yakov. There are many ways of creating Web applications and creating them for the enterprises is not the same as developing a Web site for a pizzeria in your neighborhood. During the last five years we’ve been using mainly Adobe Flex for development of the front end of Web applications. Flex applications work in a well known and predictable run-time e... (more)

Eighteen Open Source Content Management Systems (Part 3)

This is the third blog post in a series of blog posts about open source Content Management Systems (CMS). You can find the first two parts here (Part 1) and here (Part 2) . In the last article in this series we covered Xoops, Seotoaster, e107, Concrete5, and Typo3, five leading Content Management Systems. In this article we talk about the next five: MediaWiki, Moveable Type, dotCMS, Dotclear, and Zope/Plone.   11. Media Wiki MediaWiki is a PHP designed open source software wiki package, initially built for use on Wikipedia. Now it is used by several other projects of the no... (more)

How to Monitor JMX with Monitis

Introduction The Java 2 Platform, Standard Edition beginning with version 5.0, supports JMX 1.2 and JMX Remote API 1.0, which is now the official JMX reference implementation. It includes significant monitoring and management features which can be divided into three broad categories. Instrumentation for the Java Virtual Machine (Java VM) that enables built-in (or out-of-the-box) management capabilities that can be accessed both remotely and locally. Monitoring and Management application programming interfaces (API) that provide the interface for monitoring and managing the Java ... (more)

E-Commerce with Hybris

People are accustomed to buying goods online. If a company sells products to individuals, we call it B2C for Business To Consumers. If a business sells to other businesses – it’s B2B. Having an online store allows to sell around the clock regardless of the consumer’s location (at least within the country) as long as he or she is connected to the Internet. People spend some substantial time online and sellers are trying to reach their clients via all possible channels and devices being that a regular HTML Web page, a social network, a mobile application on any device with embedded... (more)

A Sneak Peek at Sun's Cloud Computing Offerings

Sun's role in enabling Cloud Computing is not widely recognized today. However, did you know Sun is playing a big role in this space? Check out this round-up of Sun's Cloud Computing porfolio below and stay tuned for more to come from Sun in this space. MySQL is almost the defacto database of choice powering the web-scale next-generation of database driven web applications in the cloud. Cloud computing solutions for MySQL makes it easy to develop, deploy, and manage your new and existing MySQL-backed applications in a virtual computing environment. The MySQL Enterprise for Amazon ... (more)