open source xmpp for cloud services
DESCRIPTION
Open Source XMPP for Cloud Services. Matt Tucker, CTO Jive Software. 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…. In This Talk. - PowerPoint PPT PresentationTRANSCRIPT
Open Source XMPP for Cloud ServicesMatt Tucker, CTO Jive Software
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…
In This Talk
Brief XMPP and cloud computing overview
Problems in cloud architectures; how XMPP can help
Open Source tools
Tips and tricks
XMPP (Jabber) Overview
The open protocol for instant messaging (it’s 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
XMPP Building Blocks
Description Example
Presence Send presence data or manage presence subscriptions
<presence from=‘[email protected]’>
<status>Giving a talk...</status>
</presence>
Message Send data between users
<message to='[email protected]'
from='[email protected]’>
<body>How's that presentation going?</body>
</message>
IQ Exchange information and perform queries using a request / response protocol.
<iq to=‘weather.jivesoftware.com’ type=‘get’ id=‘123’><query xmlns=‘jabber:weather’><city>pdx</city></query></iq>
<iq from=‘weather.jivesoftware.com’> type=‘result’ id=‘123’><query xmlns=‘jabber:weather’><weather>Not Raining!</weather></query></iq>
What is Cloud Computing?
Predominately based on web services (SOAP, REST, etc)
Exploding in popularity – a critical trend of software architectures
Started with simple services; now growing complex
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 polling – but there are firewall issues
Cloud Architecture Problems
Polling doesn’t scale and isn’t real-time
Need two-way data exchange with easy firewall traversal
Web services are feature poor (presence, binary data, etc)
SOAP is what’s needed for complex services, but it’s overly complicated
Thesis: web services are great for simple cloud services; XMPP is better for complex cloud services
XMPP vs. SOAP
XMPP SOAP
Performance
Security
Ease
Innovative Features
Ubiquity
XMPP Cloud Architecture
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
Open Source Tools: Client APIs
Dozens of libraries in every major programming language – start at jabber.org
Java: Smack library from igniterealtime.org
Flex: XIFF library from igniterealtime.org
Javascript: JSJac, dojox.xmpp
Open Source Tools: Cloud Components
Whack (Java) – simple and high level API
Components use XEP-114 (easy)
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 authentication
manager.setSecretKey("weather", "test");
// Register this component to a subdomain of the server
manager.addComponent("weather", new WeatherComponent());
//... Component will now start processing requests
}
}
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() {
}
}
Example: Clearspace Doc Sharing
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 (mostrecently Gnip)
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 multiple times 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
