Elastos is an open source platform that allows for the creation of universal apps using C/C++ that can run across the internet and integrate local and web services. It rewrote over 2 million lines of Android framework code and hides IPC, internet, and IoT protocols to prevent attacks. Elastos uses its own Component Assembly Runtime technology instead of Windows UWP's COM/C++ APIs or Android's Java framework to allow for cross-platform app development in C/C++ and integration with JavaScript, Java, and web apps.

1. Elastos
Elastos.org
6/22/2016
Decentralized App/Service Platform
Across the Internet

2. An Open Source Platform for Universal Apps
 Self Contained C/C++ Native API
 Rewrote more than two million lines of Android Java Framework code;
 Facilitates Universal Apps
 C/C++, Java, JS programs call each other without resorting to JNI;
 Unifies Local and Web Services
 Loosely coupled and on-demand loading services across the Internet;
 Hides All IPC, Internet and IoT Protocols
 Network-agnostic model prevents DDoS attacks and privacy leaks.

3. Windows UWP vs. Elastos
Key Points Windows UWP Elastos
Programming Runtime API WinRT API based on COM/C++ ElastosRT API based on CAR/C++
Primary Programming Languages C/C++, C#, VB, JavaScript C/C++, Java, JavaScript
Application Framework Unified Native Framework (.NET) Unified Native Framework (Android)
UI Rendering XAML XML
Screen Size Adapting Wide, Middle, Narrow mdpi, hdpi, xhdpi, xxhdpi
IoT Framework AllJoyn AllJoyn
• Note: UWP stands for Universal Windows Platform, the Microsoft terminology of universal apps.
COM stands for Component Object Model, a Microsoft Component/Service technology.
CAR stands for Component Assembly Runtime, an Elastos technology for SaaS programming.

4. Elastos Block Diagram
safety restricted
Kernel
ElastosRT APIs
C++ Apps
Distribute CAR Services & IoT
Web Apps
Html/css & JS
Java Apps
Security
Distribute Framework
Register & Find Manager
Connection Manager
Push Manager
Local Services
Activity Manager Window Manager
Package ManagerResource Manager
Notification Manager Content Manager

5. Elastos Programming in C/C++
 Based on homebrew CAR (Component Assembly Runtime) technology,
Elastos supports SaaS programming in native code;
 Interface oriented and event driven;
 Binary file format .eco is .so plus .cls;
 Utilizing .cls to cross language/network
barriers:
 No more JNI;
 No more proxy/stub;
 Write once, run everywhere.
Binder Socket
CAR Runtime
Application
Process
Binder
CAR Runtime
Application
Process
Socket
CAR Runtime
Application
Process
Machine A Machine B

6. Elastos is Android Compatible
Binder
Dalvik VM
Elastos RT Proxy
Java Framework JNI
Java Framework
Android Java App
Elastos RT Elastos C++ Framework
Elastos C++ App

7. JavaScript interacts with C++
var eventHandler = (function() {
return {
OnEvent:function(i) {
var s = 'OnEvent, i: ' +
JSON.stringify(i);
elastos.log(s);
},
}
})();
var module = elastos.require('Demo.eco');
var obj = module.createObject('CDemo');
obj.addEventHandler(eventHandler);
obj.doTask();
Module
{
interface IEventListener {
OnEvent(
[in] Int32 id);
}
interface IDemo {
AddEventHandler(
[in] IEventListener* listener);
DoTask();
}
class CDemo {
interface IDemo;
}
}
...
ECode CDemo::AddEventHandler(
/* [in] */ IEventListener* listener)
{
m_Listener = listener;
return NOERROR;
}
ECode CDemo::DoTask()
{
m_Listener->OnEvent(9);
return NOERROR;
}
...
JavaScript Demo.car (compiled to .cls) CDemo.cpp (compiled to .eco)

8. End-to-End Solution for a Safer Cyberspace