Extending Tizen Native Framework with Node.js

Extending

Tizen Native Framework

with Node.js

Nishant Deshpande

Hyunju Shin Ph.D.

Samsung Electronics

2

Native or Web ?

Why JavaScript, Node.js ?

Proposed Architecture

Sample Applications

Going Forward

Contents

3

API Choices

Native or Web?

4

Performance

Memory

Beautiful Transition

Performance

Memory

Productivity

Developer Pool

Beautiful Transition

Productivity

Developer Pool

Legacy App Legacy App

- + Native or Web

Native Web

5

API Choices

Is there any Alternative?

6

• Easy to Develop

• Easy to Extend

• Lightweight and Fast

Design Principles

7

• Easy to Develop

JavaScript

• Easy to Extend


Design Principles & Decision

8

• Most Popular Programming Language on the Planet

Swift

MatLab

Haskell

Go Scala

R

Shell

Perl

Objective-C

C CSS

Ruby C++

C# Python

PHP

Java

JavaScript

http://stackoverflow.com/research/developer-survey-2015

http://redmonk.com/sogrady/2015/07/01/language-rankings-6-15/

Design Decision - Why JavaScript?

60 65 70 75 80 85 90 95 100 0

60

65

70

75

80

85

90

95

100

Po

pu

larity

ran

k in

Sta

ck o

verflo

w ( #

of T

ag

s)

Top 20 Popularity Rank in GitHub (# of Projects)

9

• Most Desirable technology / language to work with in near future

http://stackoverflow.com/research/developer-survey-2015


17.70%

15.40%

14.80%

14.60%

13.20%

10.50%

9.40%

8.50%

8.50%

8.00%

Android

JavaScript

Python

Node.js

AngularJS

Java

iOS

Raspverry Pi

Swift

C#

Most Desired

10


• Presence everywhere from Web to Enterprise

11


• Presence everywhere from Web to Enterprise

• Now even in Drones and Robots!

12

• Easy to Develop

JavaScript

• Easy to Extend

Node add-ons



13

Design Decision - Why Node.js?

Event Loop(Single Thread)

Requests

File System

Database

Computation

Trigger Callback

Register Callback

Operation Complete

• Popular JavaScript Runtime

• Event Driven Programming

14



• Very Active Community

• Enterprise Ready


http://www.modulecounts.com/

0

20000

40000

60000

80000

100000

120000

140000

160000

180000

200000

2010 2011 2012 2013 2014 2015

# of Packages

nuget (.Net)

PyPI

GoDoc

RubyGems

MavenCtrl(Java)

npm (node.js)

15




• Very Active Community

• Enterprise Ready

• Popular framework choice in IOT space

16

• Easy to Develop

JavaScript

• Easy to Extend

Node add-ons


JavaScript binding for Native APIs


Native

C APIs

JS

APIs

17

Extending Tizen

Proposed Architecture

18

Tizen Architecture

Native Framework

Native Applications

Linux Kernel & Device Drivers

App Framework

Telephony

Multimedia

Base Security System

Graphics & UI

Web Applications

Tiz

en

Web Framework

Connectivity

Messaging Web PIM

Native API

Web API

Location

Status quo

19

Proposed JavaScript Framework

Native Framework

Native(C or C++)

Applications


App Framework

Telephony

Multimedia

Base Security System

Graphics & UI

Web Applications

Tiz

en

Web Framework

Connectivity

Messaging Web PIM

Native API

Web API

Location

JS Applications

JavaScript Framework

After

20


• Native APIs via Node add-ons

Native Framework

Native Apps


Web Applications

Web Framework

JS Applications

JavaScript

Framework

JS Applications


V8 libuv

Node.js

Node add-ons

Node built-in Tizen Specific 3rd Party

21

Tizen Specific add-ons Tizen Specific add-ons

• Tizen Native Node

• DALi(3D UI Toolkit)

• Lifecycle Manager

• Event Loop Integration(gcontext)

• Logging

Tizen Specific Node add-ons

Tizen Native Node DALi

Lifecycle

Manager Event Integrator Log Utility

JS Applications


V8 libuv

Node.js

Node add-ons

Node built-in Tizen Specific 3rd Party

22

Inside Native Node

• Interface to Native APIs

• Dynamic Plugin Loading

• API Privilege Check

• Native –JS API mapping

Native Node

Native Plugin Loader

Native Plugin- C++

Core Core Module

Native Node add-on

JavaScript API

Native Context

Privilege check

1.

2.

4.

5.

3

6 7

8

23

JS Apps

Sample JS Applications

24

Bluetooth Object Push

Scenarios:

1. Bluetooth Activation / Deactivation

2. Bluetooth Device Discovery

3. Device bonding, service connection

4. Object transfer and object receive using Object Push Profile

25

BT JS App JS API Plugin loader BT Plugin- C++ Bluetooth Adaptor

callSync()

Native Context

discoverDevices()

createNativePlugin()

Native node

FireEvent() BT_ADAPTOR_DEVICE_DISCOVERY

_STARTED

Load()

OnLoad()

Bluetoothadoptor_discoverDevice()

DiscoverDevices()

DiscoveryStatusChangeCB()

BT_ADAPTOR_DEVICE_DISCOVERY_

FOUND

DiscoveryStatusChangeCB()

BT_ADAPTOR_DEVICE_DISCOVERY_

FINISHED

DeviceDiscoverSuccssCallback()

FireEvent() DeviceDiscoverSuccssCallback()

FireEvent() DeviceDiscoverSuccssCallback()

checkAccess()

JS APP Node add-on Core

Bluetooth – Device Discovery Flow

26

2. DALi JS App - Demo

27

JS application vs. Web application

0

5

10

15

20

25

30

35

JS App Web App

Node.js : 12.8 MB

(MB) (ms)

0

100

200

300

400

500

600

700

800

JS App Web App

Memory comparison Launch Time

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Roadmap

Going Forward…

29

Roadmap

JS Binding for

all Native APIs

JS framework

Optimization

EFL Integration VM Agnostic

Node

Sample Apps,

Test Harness

SDK support

30

JS Framework in IOT ?

• Deployable to IOT devices

• For resource constrained devices

• Node.js -> IOT.js

• V8-> Jerry Script

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To Sum up..

• Whole Nine Yards of Native Framework to JavaScript Developer

• Seamless extension to libraries /packages of developer’s choice

• Easier & Faster Application Development

• More developers contributing to Tizen Eco-System

Thank You!

Extending Tizen Native Framework with Node.js

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