Node ppt

Node ppt

• 1.
  Nodejs How To? nodejs.org
• 2.
  Where do weuse it? ● Yahoo Proxy Feed ● XML Api ● IP2Country Service ● IP Spam Cop ● Skitto ● RTB Serving
• 3.
  We Started withan evil var http = require('http'); http.createServer(function (req, res) { res.writeHead(200, {'Content-Type': 'text/plain'}); res.end('Hello World '); }).listen(1337, '127.0.0.1'); console.log('Server running at http://127.0.0.1:1337/');
• 4.
  DON'T CALL MEA WEBSERVER Why?? Coz I Can even answer what 1+1 is :P I'm a platform with event-driven, non-blocking I/O for N/W application development Using Node as a Server that responds to HTTP requests is a use case :)
• 5.
  ARCHITECTURE
• 6.
  LOOP IS MYLIFE I have only one worker [Single Threaded] He runs in an Event Loop ● A Loop over a queue of events to be processed ● Event Loop !== setInterval He serves the events via callbacks and Don't dare to block him, then I will the shift to state of coma ;)
• 7.
  AM I ASYNC? Yapeople do believe so ;) Scenarios ● I/O ● setInterval ● setTimeout ● process.nextTick
• 8.
  Quick Demo
• 9.
  Programming in Node Prerequisites ● Deeper understanding of javascript closures and this [We take it for granted :P] ● Node's async behaviour ● Node's module system & npm [He is the one :)]
• 10.
  Nodejs Module System ● Inherits Common JS module system ● All you require is the cached module.exports object ● You have a lots of options to locate
• 11.
  npm ● npm !== Node Package Manager [npm is not an acronym (ninaa) - may be ;)] ● If maven is for java then npm is for node ● npm + package.json + modules The way to write node app :)
• 12.
  Is coding asynchronousway hard? We had no choice and we were left in the state below :P
• 13.
  Patterns and Antipatterns?? PS:All Javascript Patterns and Antipatterns apply ;)
• 14.
  Debugging + Monitoring:( Trust us, It is harder than developing an App :)
• 15.
  Overview Questions !!!!!!