Skills Matter : In The Brain of Neil Bartlett: OSGi: The Dyn

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In The Brain of Neil Bartlett: OSGi: The Dynamic Module System for Java

OSGi: The Dynamic Module System for Java
Neill Bartlett gives a brief introduction to OSGi, the dynamic module system for Java. OSGi has basically become the industry standard for modular Java although it has yet to be fully integrated within Java. OSGi provides a modular delegation system enabling loading of dependencies in an efficient manner instead of scanning through all of the class loads. OSGi dependencies also maintain versioning to ensure a compatible version of a dependency is loaded, it also enables different versions of the same library to be loaded at the same time.

After introducing OSGi, Neill Bartlett moves on to discuss component oriented programming (COP) using OSGi and how this is an improvement on OOP. Neill explains that OOP which aimed to enable code re-use didn't really work out how it was planned, very few classes can be removed from an application and then used within another application because of their dependencies on other classes. One solution to re-use is to not try but instead leave the class where it is and call it from there, basically SOA.

Neill Bartlett explains that OOP isn't really broken but it's just not the complete answer, COP extends this to make it easier to write re-usable code. COP is basically building on top of OOP but more capable of running on their own and using the services of other components. This is a great example of how OSGi can be used.

Neill Bartlett provides a demonstration of how this theory can be put into practice using a mailboxes demo. How the component can be dynamically updates as more components are services become available. He also demonstrates how easy it is to get things running with OSGi and add and remove packages.

Download the slides here

ABOUT NEIL BARTLETT

Neil is a developer, consultant and trainer specialising in OSGi and Eclipse, and he is currently working for Sun Microsystems on enhancing the tooling for JavaFX in Eclipse.
More about Neil Bartlett

PODCAST OSGI: THE DYNAMIC MODULE SYSTEM FOR JAVA

CLOUD COURSES

	CHRIS RILEY'S CLOUD COMPUTING TECHNOLOGY OVERVIEW
	MARK BIRBECK'S RDFA THEORY AND PRACTICE
	PETER LUBBERS' HTML5 “FAST TRACK”
	RICK EVANS' COHERENCE CLUSTERED CACHING
	ROBERT SCHNEIDER'S SERVICE TESTING W SOAPUI PRO

CLOUD PODCASTS

	A cloud for developers: Cloud Foundry Peter Ledbrook : 8th Dec 2011
	Heroku platform Chris O Davies : 5th Dec 2011
	Deploying Java Apps to Heroku Nicola Tassini : 5th Dec 2011
	The Why, What and How of Heroku John Beynon : 5th Dec 2011
	Cassandra Dave Gardner : 2nd Nov 2011
	SchemaSpy : 20th Oct 2011
	Interfaces on the Force.com platform : 20th Oct 2011
	Testing on Force.com : 20th Oct 2011
	B2C management : 20th Oct 2011
	Fully Operational Battle Station Bruce Durling : 20th Oct 2011
	Introduction to Platform MapReduce Simon Waterer : 12th Oct 2011
	Cassandra vs HBase Nick Telford : 5th Sep 2011
	Failure modes Richard Low : 5th Sep 2011
	Team Development Strategies Wes Nolte : 2nd Aug 2011
	UX for Hackers Various Speakers : 28th Jul 2011

OTHER CLOUD EVENTS

	Robert Schneider's Service Testing w soapUI Pro 2 DAY COURSE. Featuring Robert Schneider London, Monday, March 19th
	Peter Lubbers' HTML5 “Fast Track” 2 DAY COURSE. Featuring Peter Lubbers London, Tuesday, March 20th
	Accessory Shop in the Cloud FREE EVENT: In The Brain of James Gellately-Smith London, Thursday, May 17th
	Peter Lubbers' HTML5 “Fast Track” 2 DAY COURSE. Featuring Peter Lubbers London, Monday, May 21st
	Peter Lubbers' HTML5 “Fast Track” 2 DAY COURSE. Featuring Peter Lubbers London, Tuesday, July 10th
	Peter Lubbers' HTML5 “Fast Track” 2 DAY COURSE. Featuring Peter Lubbers London, Tuesday, September 18th
	Peter Lubbers' HTML5 “Fast Track” 2 DAY COURSE. Featuring Peter Lubbers London, Tuesday, November 13th