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![Installation
./configure --prefix=/opt/node
make
sudo make install
[prasoonk@prasoonk node-v0.8.6]$ node –version
v0.8.6
[prasoonk@prasoonk node-v0.8.6]$ node
2+3
5 process.versions
{ http_parser: '1.0', node: '0.8.6', v8: '3.11.10.17', ares: '1.7.5-DEV', uv:
'0.8',
zlib: '1.2.3', openssl: '1.0.0f' }](https://image.slidesharecdn.com/node-jsintroduction-120821025503-phpapp02/85/Node-js-introduction-9-320.jpg)
![npm commands
• ls [filter] – installed, stable, @1.0
• Install package_name@version branch
• rm](https://image.slidesharecdn.com/node-jsintroduction-120821025503-phpapp02/85/Node-js-introduction-12-320.jpg)
Uploaded byPrasoon Kumar
Node.js introduction
Node.JS Deep Dive training deck by Prasoon Kumar. The presentation introduces Node.JS as a server-side JavaScript framework built on Google's V8 engine that uses a non-blocking and event-driven architecture. It discusses companies using Node.JS like Google, Microsoft, Yahoo and Facebook and how Node.JS handles requests in an event loop as opposed to blocking threads. The presentation also covers installing Node.JS, the Node package ecosystem with NPM, and an API tour of core Node.JS modules for processes, file systems, networking and more.
More Related Content
Node.js introduction
- 1. Node.JS Deep Dive Training Deck By Prasoon Kumar Senior Technical Architect Just Dial Presentation Material 1 18th August,2012
- 2. What is node? • Server-side JavaScript framework • Written using Google V8 engine • Uses CommonJS module system • Has the ECMASCript5 features • Non-blocking from ground up • Servers are normally thread based but Node.JS is “Event” based. Node. JS serves each request in an Evented loop that can able to handle simultaneous requests.
- 3. Who is usingit? • Sponsored by • Google • Microsoft (native support in Azure) • Yahoo • eBay • Facebook • LinkedIn • Many, many smaller companies
- 4. Threads VS Event-driven Threads Asynchronous Event-driven Lock application / request with only one thread, which listener-workers threads repeatedly fetches an event Using incoming-request model Using queue and then processes it multithreaded server might block manually saves state and then the request which might involve goes on to process the next multiple events event Using context switching no contention and no context switches Using multithreading Using asynchronous I/O facilities environments where listener and (callbacks, not poll/select or workers threads are used O_NONBLOCK) environments frequently to take an incoming- request lock
- 5.
- 6. Node layers Node standard library JavaScript Node bindings C V8 Thread Event pool Pool libev libeio
- 7.
- 8. Non-blocking IO • Thephilosophy behind node is that system interactions should be non blocking. Instead of this var fs = require('fs'); // Import the 'fs' module var data = fs.readFileSync(__dirname + '/example.file','utf8'); console.log(data); // print it! Use this var fs = require('fs'); // Import the 'fs' module // Read the file asynchronously fs.readFile(__dirname + '/example.file', 'utf8', function (err, data) { if (err) { return console.log(err); } console.log(data); // print it! });
- 9. Installation ./configure --prefix=/opt/node make sudo makeinstall [prasoonk@prasoonk node-v0.8.6]$ node –version v0.8.6 [prasoonk@prasoonk node-v0.8.6]$ node 2+3 5 process.versions { http_parser: '1.0', node: '0.8.6', v8: '3.11.10.17', ares: '1.7.5-DEV', uv: '0.8', zlib: '1.2.3', openssl: '1.0.0f' }
- 10. What are packages? •Ruby has Gems • Python has PyPI • PHP has PEAR (terrible) Node.js has Packages
- 11. Node Package Manager(NPM) • http://npmjs.org/
- 12. npm commands • ls[filter] – installed, stable, @1.0 • Install package_name@version branch • rm
- 13. NPM – NodePackage Manager
- 14. API Tour • Platform – process – file system – Networking • net, dgram, http, tls (ssl) • Utility – console – util • Buffer • Event Emitter • Timer
- 15. Process • Process –PID, platform, memory usage • Child_process – – spawn and kill processes, – Execute commands and – Pipe their outputs
- 16. API Tour: FileSystem • fs • path
- 17. Hello World server.js File: varhttp = require('http'); http.createServer(function (req, res) { res.writeHead(200, {'Content- Type':'text/plain'}); res.end('Hello, world! '); }).listen(80);
- 18. Realtime apps Real easy DERBY
- 19. All app codeclient and server Real-time synced • Responsive • Offline • No glue code • SEO friendly
- 20. • C:srchello> npminstall derby DEMO
- 21.
- 22. Quick References • https://github.com/joyent/node/wikiGithub Node Wiki • http://nodemanual.org - API docs, tutorials and live code samples • http://c9.io Cloud9 IDE (use github id) • http://docs.nodejitsu.com • http://howtonode.org/ Tutorials • https://npmjs.org/ NPM registry • https://github.com/WindowsAzure/azure-sdk- for-node