a Simple Powerful Platform

Hendri KarismaCodeLabs UNIKOM

2014

What is NodeJS?

“Node.js is a platform built on Chrome’s JavaScript runtime for easily building fast, scalable network applications. Node.js uses an event-driven, non-blocking I/O model that makes it lightweight and efficient, perfect for data-

intensive real-time applications that run across distributed devices.”

How Fast

Against Python3, JavaScript V8 Engine has a median benchmark 13 times as fast with

a roughly similar code size. 3 Against Ruby 1.9, the median benchmark is eight

times as fast

Theory• Build Google’s V8

JavaScript engine• I/O Latency

I/O Latency

The Problem

Scale with Multi Thread

• Overhead pada switching• Execution stask take up memory• Complicate concurrency

Scale with Process

• High memmory Usage• Process scheduling

The Solution in Node.js

Tantangan

• Asynchronizing I/O• Debugging• CPU-Intensive Tasks

– Harus berhati-hati terhadap penggunaan thread untuk setiap tasks

• Perkembangan versi platform sangat cepat

Keuntungan• Multiplatform• Lightweight• Deadlock free

– single thread, simplifies concurency• Monoglot Programming

– dari mulai back-end hingga front end dapat hanya menggunakan javascript

• Popular• Fast• Community and NPM (8,465 packages)

*2012-03-21• Small core• Short Learning Curve

NPM• express• socket.io• mongoose

• connect• async• jade

how to install node.js

• sudo add-apt-repository ppa:chris-lea/node.js

• sudo apt-get update• sudo apt-get install nodejs

Demo

• Hello World• SimpleChat Application

MongoDB (NoSql Database)

• Not Only SQL (NoSQL)• Non Relastional Database Management

System

Kenapa NoSQL (MongoDB)• Database non relasional• Terdistribusi dan scale out (secara horisontal)• Tanpa skema atau dengan skema yang longgar• Sederhana dalam pemakaian (API)• Kemudahan replikasi

Document-Oriented

• Notion of a Document• Enkapsulasi dokumen dan enkoding

dalam format standard (XML, JSON, YAML, PDF, dll)

• Mirip relational DB, tetapi setiap ‘row’ tidak harus memiliki struktur yang sama.

Demo

• Simple CRUD with express and MongoDB

Thanks....

Hendri Karismahttp://about.me/hendriKarisma

source code sample program demo dapat di download di https://github.com/situkangsayur?tab=repositories