Posts Tagged ‘narwhal’

Real-time Comet Applications on Node with Tunguska

Monday, July 19th, 2010
This entry is part 8 of 8 in the series Server-Side JavaScript, Pintura, and Persevere 2.0

Node is a server-side JavaScript platform that is known for being well suited for Comet-style applications that utilize long-lived connections to allow applications to send messages from the server to the browser asynchronously. In fact, the beginning of the front page of nodejs.org starts out with an example of a web application that delays for a couple seconds before sending a response without any type of blocking; the code is asynchronous and efficient.

However, building a real-life real-time application involves more than just a platform that gives you asynchronous communication, there are a number of other important techniques to understand. We will look at these techniques and introduce project Tunguska that provides some helpful tools to assist in building applications. While a number of Comet projects out there attempt to provide a black box solution to Comet, Tunguska recognizes that most real-time applications involve deep integration into the application and its security, messaging, and data structures. Consequently Tunguska is a set of tools for building real-time applications rather than a closed black box that can’t easily be integrated with. Let’s look at some of these tools.

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Introducing Pintura

Friday, January 22nd, 2010
This entry is part 2 of 8 in the series Server-Side JavaScript, Pintura, and Persevere 2.0

Pintura is a CommonJS/JSGI-compliant, server-side JavaScript-based framework for building rich Internet application with the REST architectural style, thin storage-oriented server design, and the consistency of end-to-end JavaScript. The Pintura framework forms the core of Persevere 2.0, and is the first framework built to run on multiple CommonJS platforms like node.js, Narwhal/Jack, and Flusspferd/Zest. It utilizes a layered approach to application development that facilitates straightforward, modular web applications.

Pintura is not a traditional MVC web server framework, which often conflate presentation and interaction concerns across the client and server, but rather follows the REST prescription of maintaining simple storage and serialization oriented server also known as thin server architecture or SOFEA. Pintura is designed to cleanly separate the concerns of presentation and interaction on the client, and storage and model logic concerns on the server. This design fits perfectly with comprehensive JavaScript frameworks like Dojo, General Interface, Cappuccino, YUI, and ExtJS that provide client-side MVC. In particular, Dojo has excellent support for standards-based JSON REST interaction that matches perfectly with this server-side framework.

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