Getting started with OSGi using a 3D OSGi Robot sample application - Christian Baranowski + Jochen...

COPYRIGHT © 2008-2011 OSGi Alliance. All Rights Reserved

Getting started with OSGi

using a 3D OSGi Robot sample application

Christian Baranowski, SEITENBAU GmbH Jochen Hiller, Deutsche Telekom AG, Products & Innovation September 20th 2011

What is an OSGi Code Camp?

Experience from the first Camp

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#1 Agile Design

• Components

• Interaction

• “Post-it”-Design

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#2 Pair Programming

• Pair programming

• OSGi beginners/

experts


#3 Communication

• Ad-hoc design of

component interaction

• Interfaces agreed

between pairs

• All developers in 1 room!

• Loud!


#4 Test Driven Development

• Focus on OSGi concepts

• Too much time for

infrastructure setup

• No time for testing!


#5 Continuous Delivery

• Build server

available

• No one did care

• Late integration


Summary and Lessons Learned

from the first Camp

We need…

• Development VM

• Cool application

• List of OSGi

concepts to be

implemented


Live Demo Mars Robot

How to teach OSGi by Example


Bundle Context API

and Lifecycle

• Simple provisioning


Separate Interface (Service API)

and Implementation Bundle

• Mars robot API and world implementation bundle


Whiteboard Pattern

• Simulator desktop bundle adding internal frames


Extender Pattern

and Bundle Tracker

• Adding static objects to mars world


Configuration Admin and

Metatype Service

• Creating wall and robot instances


Event Admin Service

• Integration sensor data view and world (event bus)


Extending the OSGi Console

(OSGi RFC 147 Draft)

• Robot commands to move and rotate the robot

• Shows how to use OSGi service properties


OSGi Concepts

Should be added during the next camp

• Simulator by using the Event Admin Service

• Robot web control console with the HTTP Service

• WAR bundles (RFC66) to build a web console

• Remote robot console using OSGi Remote Services

• Service handling e.g. adding other object types to the world (balls) • with Service Tracker

• using Blueprint components

• Offer sensor and robot data by using Monitor Admin Service

• Add logging with the Log Service

• Preferences Service to persist some user settings (e.g. world size)


Conclusion

• Mars Robot is a cool application

• OSGi concepts can be demonstrated very easily

• Robot domain nice for running OSGi example

• Extensible in various areas

Mars robot as a “PetStore” for OSGi applications?


OSGi Code Camp Berlin

• about

20 participants

• VirtualBox VM

• Felix, bndtools

• Hosted at Telekom

Laboratories


Discusssion and Q&A


References

• Simbad 3D Robot Simulator http://simbad.sourceforge.net/

• Richard S. Hall et. al. OSGi in Action - Creating Modular Applications in Java

• Apache Felix: RFC 147 Overview http://felix.apache.org/site/apache-felix-gogo.html

• OSGi Code Camp 2010 – Konstanz http://germany.osgiusers.org/Main/SummerOCC2011

• OSGi Code Camp 2011 – Berlin

• http://germany.osgiusers.org/Main/SummerOCC2010

• bndtools http://bndtools.org

• Apache Felix Application Demonstration http://felix.apache.org/site/apache-felix-application-demonstration.html


http://simbad.sourceforge.net/

http://felix.apache.org/site/apache-felix-gogo.html





http://germany.osgiusers.org/Main/SummerOCC2011

http://germany.osgiusers.org/Main/SummerOCC2010

http://bndtools.org

http://felix.apache.org/site/apache-felix-application-demonstration.html







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