NodeJS Tour
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Node.js is a JavaScript runtime built on Chrome's V8 JavaScript engine. It allows JavaScript to run on the server-side and is used for building scalable network applications. Node.js uses an event-driven, non-blocking I/O model that makes it lightweight and efficient, as well as packaged modules to help build everything from web servers to utilities. Popular Node.js frameworks include Express and Restler for building web servers and APIs.
NodeJS Tour
- 1. JavaScript on the Server Side
- 2. I’m arunoda
- 3. IntroductionFramework to built ServersIt’s about JavaScriptCreated by Ryan Dhal in 2009
- 4. ArchitectureJavaScriptC++NodeJS bindings (http, socket, IO etc..)Event LoopLibEVThread PoolLibIOJS EngineV8
- 5. Programming modelEvented - No ThreadsNon Blocking IOUse of callbacks (closure)db.insert({data:1000}, function(err) { //do something after inserted})console.log("I don't wait");
- 6. SupportCommercial – Community – Mainly over Just 2 years old~2500 modules~800 authors~300 new modules per month~2000 new module updates per month
- 7. Web and nodejsWebsitesConnectExpressREST APIExpressGeddyCommunicationSocket IONow JS (RPC)Dnode (RPC)HTTP API - RESTler
- 8. Express - samplevar app = express.createServer(); app.get('/info', function(req, res){res.send('Hello World');}); app.listen(3000);
- 9. NOWJS - SampleServer.jsvar server= require("http").createServer();varnowjs = require("now");var remote= nowjs.initialize(httpServer); remote.now.getServerInfo = function(callback){getInfo(callback);}server.listen(8000);Access.html<script>now.getServerInfo(function(data){//do something with the data});</script>
- 10. RESTler - Samplevar rest = require("restler"); rest.get("http://google.com").on("complete", function(data) {console.log(data);});
- 11. Database support
- 12. Package managerIt’s called NPMLike ivy But with JSONnpm install expressnpm publish
- 13. IDE It’s BADNo great debuggerCloud9 IDESublime Text 2
- 14. HOSTING
- 15. NODEJS ExperienceStarted 3 months backRewritten Yalu on NodeJSImproved PerformanceProjects on
- 16. Usefull linksNodeJS Sri Lankabit.ly/nodelkNode Linksbit.ly/node-info