The document describes an agenda for a lab on real-time features in Liberty HTML5. The lab exercises include: [1] Creating a simple WebSocket application; [2] Creating a video chat application using the new Rtcomm feature; and [3] Creating an integrated WebSocket and Rtcomm AngularJS application using the new angular-rtcomm module. The document also provides an overview of the WebSocket and Rtcomm APIs and how they can be used to build real-time applications.

1. © 2015 IBM Corporation
Liberty HTML5
Real-Time Features Lab
Brian Pulito
email: brian_pulito@us.ibm.com
twitter: @brianpulito
Erin Schnabel
email: schnabel@us.ibm.com
twitter: @ebullientworks
Scott Graham
email: swgraham@us.ibm.com

2. Liberty HTML5 Real-Time Agenda
Lab exercises:
• Create a simple WebSocket application
• Covers the Java EE WebSocket APIs
• Covers the HTML5 JavaScript APIs
• Create a video chat application
• Covers the new Liberty Rtcomm Feature
• Covers the new Rtcomm JavaScript library
• Create an integrated WebSocket and Rtcomm AngularJS
application
• Covers the new angular-rtcomm module.
• Create a Third-Party Calling Application
• Covers the Rtcomm Node-RED capabilities

3. Liberty HTML5 Real-Time Features Lab
• wsoc-1.1
• Enables WebSocket programming model.
• WebSocket 1.1 available in latest beta.
• WebSocket 1.0 available in eGA.
• rtcomm-1.0
• Enables real-time communications engine for WebRTC
• No knowledge of Telecom protocols required
• Requires no backend programming
• Designed for web developers
• Enabled through open source JavScript
Liberty Beta Download:
https://developer.ibm.com/wasdev/downloads/liberty-profile-beta/

4. Create a simple
WebSocket
application

5. Using WebSockets in a Java EE Environment to
Improve Web Application Development
 Programming model for the Java EE environment
 WebSocket API
•Endpoint configuration
•Session open/close
•Message read/write
•Error handling
•Annotations
 WebSocket network protocol
•Optimized Data format
4

6. WebSocket connection
Handshake:
•Client initiates connection
•Server responds (accepts the upgrade)
Once the WebSocket is established
•both sides notified that socket is open
•either side can send messages at any time
•either side can close the socket
5
HTTPGET
connection
Client
Server
msg msg msg msg closeopen
open msg
msg
error msgmsg
msg

7. WebSockets API
Programmatic or annotation-based approach
Client and Server Endpoints
•Have a lifecycle
–onOpen
–onClose
–onError
•Communicate using Messages
–onMessage
–send
•Use sessions
Encoders and Decoders deal with data formatting
•Messages Java Objects
6

8. PlanningPoker Screen Shot
7

9. Create a video
chat application

10. 9
What is WebRTC?
Why is WebRTC so disruptive?
Eliminates complexity of delivering codecs and streaming protocols.
Closely aligned with HTML 5.
Enables real-time data communications in addition to voice and video.
Strong industry support.
Enables contextual communications!
WebRTC offers web application developers the
ability to write rich, realtime multimedia applications
on the web, without requiring plugins, downloads or
installs. (source www.webrtc.org)
WebRTC does not define the signaling plane. It only defines a model for sending
and receiving media and a set of protocols for traversing firewalls.
9

11. WebSphere Liberty Rtcomm Engine
MQTT
Embedded
MQTT
Broker
Transport (TCP, UDP, WebSockets)
rtcomm-1.0 Feature
Rtcomm
Services
Rtcomm
Services
Rtcomm
Services
Rtcomm services provide backend capabilities like call queueing.
Now
Available in
Liberty
Beta!
SIP
Servlets
(JSR 289)

12. WASdev Rtcomm Open Source Architecture
rtcomm.js
Web Browser
angular-rtcomm
Angular Applications JavaScript Applications
WebRTC

13. rtcomm.js – JavaScript client for Rtcomm
• Raw JavaScript library for Real-Time Communications
• WebRTC + Signaling + Presence = rtcomm.js
• Supports chat, queues, and presence
• Includes sample video chat application
• Foundation for advanced app development
bower install rtcomm
https://github.com/WASdev/lib.rtcomm.clientjs

14. Video Chat Screen Shot

15. Create an
integrated
WebSocket and
Rtcomm AngularJS
application

16. lib.angular-rtcomm – Rtcomm for AngularJS
• AngularJS module
• UI elements for rapid client app integration
• Ready for modern web application development
https://github.com/WASdev/lib.angular-rtcomm
bower install angular-rtcomm

17. Angular Planning Poker Screen Shot

18. Create a Third-
Party Calling
Application

19. Rtcomm and Node-RED
Node-RED:
• A visual tool for wiring the Internet of Things like:
• MQTT enabled devices, MongoDB, Twitter, and much more!
Rtcomm Node-RED Nodes
• Third-Party Call Control
• Event monitoring
https://github.com/WASdev/lib.rtcomm.node
https://github.com/WASdev/lib.rtcomm.node-red
npm install node-red-contrib-rtcomm
npm install rtcomm

20. Caveats and Notes
• The beta used in this lab will change before the GA
• WebCams and Virtual Images do not like each other
• Learn More:
• 2811 Amaze Your Customers with Liberty Real-Time
Communications: Thursday 1–2 PM Mandalay Bay Reef Ballroom F
• Solution Expo: Application Infrastructure and Integration
– 11:30 AM – 2 PM on Wednesday
– 9 AM – 11 AM on Thursday
19
www.wasdev.net
www.wasdev.net/webRTC

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