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Oscar Renalias, profile picture
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Node.js, for architects - OpenSlava 2013

The document provides an overview of Node.js, highlighting its features such as server-side JavaScript, asynchronous event-driven architecture, and robust community support through npm. It discusses various use cases for Node.js, including RESTful services and real-time applications, while cautioning against its use for CPU-bound tasks. Additionally, the document details the development toolset available and notes Joyent's role as the corporate steward of Node.js.

Tecnología◦
Oscar Renalias Getting started with Node.js October 11, 2013 Organizers Top Media Partner Media Partner Supporter
About me @oscarrenalias github.com/oscarrenalias oscar.renalias@accenture.com oscar@renalias.net
Server-side
Javascript • Dynamically typed • Supports functions/closures • Object-oriented with prototype-based inheritance • Standardized as ECMAScript
V8: High Performance JavaScript Engine • JIT to native: x86, ARM and MIPS • On-the-fly recompilation of “hot” functions with an optimizing compiler • ECMAScript compliant
Single threaded??
Asynchronous, Event-based Event producers Event Event Event Callbacks
Single threaded, asynchronous, event-based! Wait for callback Wait for I/O Wait for I/O Callback ready
Event callbacks
Sequential callbacks?
So why are async and events good? • Easier to write • Scales better • Lower memory, CPU overhead
Rapid prototyping, rapid development
RESTful services with no effort
No-fuss, native JSON handling
Awesome Package management • Gets out of the way • Support for internal and public modules • Kiss problems with transitive dependencies goodbye
Community modules http://npmjs.org
Interesting Projects: Express • Minimal web application framework • Additional features are provided as modules or middleware: template engines, models, authentication and authorization, etc
Interesting Projects: Socket.io • Provides support for server-initiated push events using WebSockets, Ajax polling, Iframe, JSONP or Flashbased channels • Transparent for both clients and servers • Can run standalone or integrated with Express SERVER CLIENT
Interesting Projects: Meteor • Next-gen framework for real-time collaborative web applications • Live page updates • Support for offline databases with subsequent synchronization
When to use Node.js • REST+JSON APIs • Backend for single-page web apps: same language in client and server • Real-time web apps with Socket.io and Meteor • Quick prototyping • Rapidly evolving applications: media sites, marketing, etc
When not to use Node.js • CPU-bound tasks • Multi-threaded applications • Applications that have to process large amounts of data • Boring CRUD-type web apps
Ready for the Enterprise?
Maturity • Under development since 2008 • Node.js 1.0 around the corner • Nearly 40000 modules available via npm • Awesome community • Commercial support
Lightweight Architecture Enabler
Does it Scale?
Performance Test: multiple database queries per request, serialized as JSON responses
More Performance Test: return a response as a simple serialized JSON object Source: http://www.techempower.com/benchmarks/
Not the fastest; does it always matter?
Javascript Weird shit Like Java, with simple syntax and no types
JavaScript is quirky different • Prototype-based inheritance • “==“ versus “===“ • The meaning of “this” • Call, apply and bind in Function.prototype And more.
Solid development toolset
Toolset • Large selection of testing libraries: unit testing, functional testing, BDD • Static code analysis (JsHint) • IntelliJ IDEA, Eclipse (Nodeclipse) integration: highlighting, refactoring, debugging • Integration with Jenkins/Hudson, Node.js specific CI servers • NPM supports internal module repositories
Architects have a little bit of extra work Node.js currently lacks standards; extra effort and care must be paid to • application architecture, • development lifecycle, • code quality, And many more.
Big teams, big codebases
Where does it run?
Is it commercially supported? Joyent is the corporate steward of Node.js, the world’s best runtime for today's data-intensive, real-time applications. Joyent offers exclusive debugging and performance analysis tools for Node.js applications.
Anybody using it?