The document discusses Apache Karaf, an open source OSGi container. It provides: 1) An introduction to OSGi and its benefits like component-based modularity and treating applications as services. 2) An overview of Apache Karaf - an OSGi container that adds features like provisioning, deployment, administration and management. 3) How to develop applications for Karaf using standard Maven structures and deploying bundles and features to the Karaf container.

1. OSGI with Apache Karaf

2. Introduction Gerald Preissler

3. Talend Professional Services

4. Consultant & Architect Talend ESB CXF

5. Camel

6. Karaf

7. ActiveMQ

8. Talend Open Studio [email_address] Document Identifier

9. Agenda Why OSGI?

10. What is Apache Karaf?

11. How can I develop for Apache Karaf?

12. What are the advanced features?

13. What is coming? Document Identifier

14. Why OSGI? Component-based modularity

15. SOA in the small

16. Standard services Document Identifier

17. Component-based modularity An individual component is a bundle A bundle is a jar file with additional metadata Imports Exports Dependency management is enabled through metadata Imports Exports Bundle lifecycle is controlled by the OSGI container Classloading environments are separated between bundles Multiple bundles can be combined into a feature Feature Document Identifier Bundle Classes & Ressources Metadata Classes & Ressources Metadata

18. Component-based modularity Metadata is located in MANIFEST.MF Can be created manually Peter Krien's bnd tools and derived utilities provide a convenient way to create it automagically Manifest­Version: 1.0 Bundle­ManifestVersion: 2 Bundle­Version: 2.1.6 Bundle­Name: Talend Logger Bundle­SymbolicName: t_logger Export­Package: org.talend.osgi.logger;version=2.1 Import­Package: org.apache.log4j;version=”[1.2,2)” Private­Package: org.talend.osgi.logger.internal Document Identifier

19. SOA in the small ● OSGi Service Registry allows a bundle to expose or use services ● A service is specified by an interface ● A provider bundle registers an interface implementation Service Registry Bundle Bundle register get listen ● A consumer bundle searches and uses a service Document Identifier B A Interface Impl Interface

20. Standardized Utility Services Service Description Configuration Admin set and get the configuration information of deployed bundles Logging receives log entries and then dispatches these entries to other bundles Event Admin inter-bundle communication mechanism based on a publish-and-subscribe model User Admin database with user information (private and public) for authentication and authorization purposes ... Source : Wikipedia

21. What is Karaf? - Sits “on top” of an OSGI container - Adds additional functionality via add-on features - Control of container via direct shell, ssh or web console - Provisioning and deployment via filesystem, Maven repository, archive, OBR - Administration and management via JMX - Configuration via filesystem, web console, JMX - Dependency injection with Spring DM or Blueprint Document Identifier OSGI Container Console Provisioning & Deployment Admin Management Configuration Blueprint ….

22. How can I develop for Apache Karaf? Document Identifier

23. Use the standard Maven project structure Organize sources and resources as usual

24. No OSGI-specific configuration required For OSGI-services use Blueprint configuration Use the Maven Bundle plugin to generate your OSGI configuration Document Identifier

25. Deploy locally Container Repository mvn package mvn install bundle:install file:// ... bundle:install mvn: ... Document Identifier

26. Get your dependencies Bundles for 3rd party dependencies are easily available Use a pre-packaged bundle Maven Central

27. Apache ServiceMix Bundle Repository

28. SpringSource Enterprise Bundle Repository Wrap an existing JAR file By adding the MANIFEST.MF

29. Using bnd or other tools Document Identifier

30. Use Karaf WebConsole to control your container Provides a remote admin gui with similar capabilities like the local shell View and control bundles and features

31. View and edit bundle configuration

32. Access logs

33. Use a web-based shell

34. ... Document Identifier

35. Dynamically configure your application Imports Exports Configuration source ConfigAdmin service monitor inject Document Identifier Bundle Classes & Ressources Metadata Container

36. Package your feature for deployment Container mvn package deploy Document Identifier Karaf Archive (KAR)

37. Integrate Karaf with CXF and Camel CXF Provide WebService based applications as OSGi bundles

38. Simple deployment for Camel routes

39. Some configuration required

40. Or use pre-packaged distribution, e.g., Talend ESB Document Identifier Container

41. Advanced features Child instances Provide multiple container instances from one installation Karaf Cellar Clustering for Karaf Karaf Cave (incubation) Better support for OSGi Bundle Repository ... Document Identifier

42. Where to go from here? Karaf homepage karaf.apache.org Blogs Christian Schneider www.liquid-reality.de/ Dan Kulp www.dankulp.com/blog/ Jean-Baptiste Onofre blog.nanthrax.net/ Talend Forum www.talendforge.org/forum/ Document Identifier