XMPP_Open Source Components for Cloud Services Presentation.ppt

7/27/2019 XMPP_Open Source Components for Cloud Services Presentation.ppt

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Open Source XMPP for

Cloud ServicesMatt Tucker, CTO Jive Software


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Who am I?

Member of the XMPP Standards Foundation and

former chair of the board

Behind Smack and Openfire at igniterealtime.org

Keep giving talks about XMPP at OSCON


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In This Talk

Brief XMPP and cloud computing overview

Problems in cloud architectures; how XMPP can

help

Open Source tools

Tips and tricks


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XMPP (Jabber) Overview

The open protocol for instant messaging (its fair to

declare victory)

IETF standard and a robust org developing the

protocol: XMPP Standards Foundation

Simple for developers and very deep Open Source

toolset and heritage


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XMPP Building Blocks

Description Example

Presence Send presence dataor manage presence

subscriptions

Giving a talk...

Message Send data betweenusers

Not

Raining!


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What is Cloud Computing?

Predominately based on web services (SOAP,

REST, etc)

Exploding in popularitya critical trend of software

architectures

Started with simple services; now growing complex


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Cloud Service Example: Salesforce.com

Uses SOAP (not XML-RPC or REST)

Huge percentage of traffic is polling for updates

Introduced Outbound Messaging to cope with

pollingbut there are firewall issues


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Cloud Architecture Problems

Polling doesnt scale and isnt real-time

Need two-way data exchange with easy firewall traversal

Web services are feature poor (presence, binary data,

etc)

SOAP is whats needed for complex services, but its

overly complicated

Thesis: web services are great for simple cloud services; XMPP

is better for complex cloud services


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XMPP vs. SOAP

XMPP SOAP

Performance

Security

Ease

Innovative Features

Ubiquity


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XMPP Cloud Architecture


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Open Source Tools: Server

Openfire

Most popular XMPP server, with over 1 million

downloads

In production with many cloud services

Massively scalable

Support for even strict firewall environments -- BOSH


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Open Source Tools: Client APIs

Dozens of libraries in every major programming

languagestart at jabber.org

Java: Smack library from igniterealtime.org

Flex: XIFF library from igniterealtime.org

Javascript: JSJac, dojox.xmpp


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Open Source Tools: Cloud Components

Whack (Java)simple and high level API

Components use XEP-114 (easy)


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ExternalWeatherComponent.java

public class ExternalWeatherComponent {

public static void main(String[] args) {

ExternalComponentManager manager =

new ExternalComponentManager("example.com", 5275);

// Set the secret key for this component, for authenticationmanager.setSecretKey("weather", "test");

// Register this component to a subdomain of the server

manager.addComponent("weather", new WeatherComponent());

//... Component will now start processing requests}

}


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WeatherComponent.java

public class WeatherComponent implements Component {

public String getName() {

return "US Weather";

}

public void processPacket(Packet packet) {// Get the request packet here, parse it and return a reply

}

public void initialize(JID jid, ComponentManager componentManager) {

}

public void shutdown() {

}

}


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Example: Clearspace Doc Sharing


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Example: Twitter Fire Hose

Uses XMPP to provide access to all status updates,

which would be impossible using web services

polling

Only provided to a smallnumber of services (most

recently Gnip)


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Openfire Cloud Services: Tips and Tricks

External components allow for hot-deploy of new or

updated services

Run on separate hardware for scalability

Openfire allows components to connect multipletimes for scalability and redundancy

Epoll on Linux provides great performance

Ad-hoc command available to listen for all traffic

Use XMPP federation for federating cloud services


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Questions?

Blog Entry Link

Email/IM: [email protected]

www.igniterealtime.org
http://www.jivesoftware.com/community/blogs/jivetalks/2008/01/24/xmpp-aka-jabber-is-the-future-for-cloud-servicesmailto:[email protected]://www.igniterealtime.org/http://www.igniterealtime.org/mailto:[email protected]://www.jivesoftware.com/community/blogs/jivetalks/2008/01/24/xmpp-aka-jabber-is-the-future-for-cloud-services

XMPP_Open Source Components for Cloud Services Presentation.ppt

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