Boosting Web Communication with WebSockets

Boosting Web Communicationwith WebSockets

jWebSocket – The Open Source Solution for Real-Time Web Developers

SDC 2011April 04-05, 2011

Göteborg Convention Centre

Göteborg, Sweden

Alexander Schulze & Claudia GillrathInnotrade GmbH, Germany

Boosting Web Communication with WebSockets 205.04.2011

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Boosting Web Communication with WebSockets 305.04.2011

Agenda

• Introduction:Status, Technology, Targets

• Use and Benefits vs. http

• Models, Migration and Implementation

• Solutions, Aspects and Prospects

• Discussion

Today's Session

The Web becomes more and more

Necessity of evolution to a platform for real-time data exchange

WebSocket technology is the fundament

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Introduction

pervasive interactive social mobile

Status of Web Communication

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The HTTP Protocol

• Designed for document transmission

• Cumbersome, nearly real-time tricks• Polling, Long-Polling• Reverse-AJAX, Comet etc.

• Ultimately non-standardized hacks

• Remains a Request/Response mechanism

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WebSockets – Technology

What are WebSockets?

• Bidirectional, full-duplex, permanent TCP connections 4oo times less overhead ⅓ of latency

• Standardized in HTML5 by W3C and IETF protects investments

• Single TCP port saves 50% server resources

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WebSockets – Technology

What else?

• Designed for interactiveWeb Applications

• Open for all kind ofstationary and mobilebrowser based and native apps

• Not just a protocol, but a new paradigmRequest/Response Real-Time Comm.

Demand from Developers, Providers and Users

• CompatibilityInteroperability

• IndependencyIntegratability

• ReliabilitySecurity

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WebSockets – Targets

Demand from Developers, Providers and Users

• AvailabilityScalability

• ExtendabilityFlexibility

• SimplicityMaintainability

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WebSockets – Targets

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WebSockets – Concept

The Concept

• Framework vs. Client/Server

• 3rd Party Engines and Servers

• Message Routing, Stream, Send, Broadcast, Events, Channels

• Tokens and Plug-ins

• Listeners and Apps

• Filters and Encryption

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WebSockets – Models

jWebSocket FrameworkjWebSocket Framework

TCPNIOTCPNIO

JBossNettyJBossNetty

Glass-Fish

Glass-Fish

EclipseJetty

EclipseJetty

System

Plug-in

System

Plug-in

Custom

App

Custom

App

3rd-PartyApp

3rd-PartyApp

Custom

Plug-in

Custom

Plug-in

jWebSocket Framework

• Replacible Engines

• Stand-Alone orEmbedded Operation

• Plug-ins andWebSocket Apps

• Completely open

Engines

Plug-ins Apps

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WebSockets – Models

XMLJSON

jWebSocket Tokens

• WebSocket nodes are stupid

• Need for a common languageto understand incoming packets

• DataformatsJSON, XML or CSV

• Solution: Abstract Data objects, so called „Tokens“

jWebSocket FrameworkjWebSocket Framework

Token-ProcessorToken-Processor

NativeClientNativeClient

BrowserClient

BrowserClient

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WebSockets – Interoperability

jWebSocket FrameworkjWebSocket Framework

WebSocket Services

WebSocket Services

WebSocketApps

WebSocketApps

X-Browser-Compatibility

• Native Support inChrome 4+, FF 4,Safari 5, Opera 11

• Flash-Fallback forIE and older Browsers

• Long-Polling orComet Fallback

jWebSocket FrameworkjWebSocket Framework

WebSocket Services

WebSocket Services

WebSocketApps

WebSocketApps

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WebSockets – Interoperability

X-Platform-Compatibility

• Android (Dalvik VM)

• iPad/iPhone (iOS)

• Symbian/BlackBerry(Java ME)

• Windows Phone andSamsung Bada pending

jWebSocket Security

• SSL-Encryption

• wss://[host][:port][/path]...

• Authentication & Authorization

• Filter & Validation

• Virus-Scanning

• Spam-Filter & Banning

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WebSockets – Models

wss://

jWebSocket FrameworkjWebSocket Framework

In System-Filter OutIn System-Filter Out

ClientClient

In Custom-Filter OutIn Custom-Filter Out

Filterchain

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WebSockets – Models

jWebSocket FrameworkjWebSocket Framework

Collaboration Suite

Collaboration SuiteOnline-GameOnline-Game

Channel 2„WorkTogether“

Channel 2„WorkTogether“

Channel 1„PlayTheGame“

Channel 1„PlayTheGame“

Player 1

Player 1

Player 2

Player 2

Collab.Memb1Collab.Memb1

Collab.Memb2Collab.Memb2

jWebSocket Channels

• Publish/SubscribeMechanism

• Private and PublicChannels

• Authentication

• Separate Applications

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jWebSocket Events

• Event-Driven Programming using the Observable Pattern

• Objects are „observable“

• Clients or other instancesobserve objects andare notified by events

• Easy, flexible and effective

WebSocket –Models

Observ

e

Observer 1( Client )

Observer 1( Client )

Observer 2( Client )

Observer 2( Client )

ws://or wss://

Observable (Server)Observable (Server)

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WebSockets – Models

Synchronization Backbone

ClientClient

Node 3Node 3Node 2Node 2Node 1Node 1

Re-director

Re-director

LoadBal.LoadBal.

ClientClientjWebSocket Clusters

• Load-Balancer

• Redirector

• Backbone simplyWebSocket based

• ExternalService Nodes

Ext. Serv.Node

Ext. Serv.Node

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jWebSocket Plug-ins

• JDBC, SMTP, XMPP

• Remote Procedure CallsC2S-, S2C-, C2C-RPCs

• Object-, Filesharing

• Logging, Stats, Admin

• Chat, Stream, Twitter

WebSocket – Plug-ins

JDBCJDBC SMTPSMTP XMPPXMPP RPCRPC ......

BrowserClien

t

BrowserClien

t

Desktop

Client

Desktop

Client

Custom

Client

Custom

Client

StreamStream Sharing

Sharing ChatChat TwitterTwitter ......

MobileClientMobileClient

jWebSocket FrameworkjWebSocket Framework

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WebSockets – Application Areas

Where to use WebSockets?

• Chats, Messaging and Mail

• Remote Control and Monitoring

• Push and Streaming Services, Financial Ticker, Weather, News, Video

• Bidirectional Remote Procedure Calls

• Sharing Objects, Databases, Files

• Uniting Stationary and Mobile Applications

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WebSockets – Prospects

What is the future of WebSockets?

• New Dimension of Online-Collaboration

• New Level of Online-Entertainment

• New Opportunities for Online-Education

• New Social Participation and Contribution

What comes to your mind?

Questions & AnswersAlexander Schulze

a.schulze@jwebsocket.org

Forum & Download: http://jwebsocket.org, @jWebSocket

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Thank you for your attention!