Developing modular applications with Java EE 6 and Enterprise OSGi + WebSphere V8.5 Liberty Profile
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This document discusses developing modular Java applications using OSGi Blueprint and WebSphere Liberty Profile. It provides an overview of OSGi Blueprint, noting that it defines a dependency injection framework for OSGi bundles that understands services. The presentation discusses problems solved by OSGi Blueprint such as visibility of types and versioning. It also includes questions about the differences between Maven and OSGi Blueprint regarding build time versus runtime configuration.
Developing modular applications with Java EE 6 and Enterprise OSGi + WebSphere V8.5 Liberty Profile
- 1. Developing modular applications with Java EE 6 and Enterprise OSGi ...and WebSphere V8.5 Liberty Profile Jacek Laskowski jacek@japila.pl @JacekLaskowski wersja 1.0, Riga, Latvia, 29.11.2012
- 2. About me • Java EE, OSGi and functional programming (Clojure, F# and Scala) enthusiast • Founder and leader of Warszawa Java User Group • Javarsovia, Confitura, warsjawa conference team member • Blogger of http://JacekLaskowski.pl • Blogger of http://blog.japila.pl • @JacekLaskowski • Member of Apache Software Foundation • Apache OpenEJB and TomEE committer • Member of IBM Academy of Technology • IBMer in World-wide WebSphere Competitive Migration Team
- 3. OSGi Blueprint • Chapter 121 • Blueprint Container Specification Version 1.0 @JacekLaskowski
- 4. OSGi Blueprint defines a dependency injection framework, specifically for OSGi bundles, that understands the unique dynamic nature of services. Bundles in this programming model contain a number of XML definition resources which are used by the Blueprint Container to wire the application together and start it when the bundle is active. OSGi Service Platform Release 4,Version 4.2 page 193 @JacekLaskowski
- 5. OSGi Blueprint @JacekLaskowski
- 6. OSGi Blueprint • Dependency injection framework for OSGi bundles @JacekLaskowski
- 7. OSGi Blueprint • Dependency injection framework for OSGi bundles • Programming model @JacekLaskowski
- 8. OSGi Blueprint • Dependency injection framework for OSGi bundles • Programming model • XML to define constituents @JacekLaskowski
- 9. OSGi Blueprint • Dependency injection framework for OSGi bundles • Programming model • XML to define constituents • Enterprise OSGi == OSGi Blueprint @JacekLaskowski
- 10. OSGi Blueprint • Dependency injection framework for OSGi bundles • Programming model • XML to define constituents • Enterprise OSGi == OSGi Blueprint • For this presentation only @JacekLaskowski
- 11. Blueprint bundle A bundle is a Blueprint bundle if it contains one or more blueprint XML definition resources in the OSGI-INF/blueprint directory or it contains the Bundle-Blueprint manifest header referring to existing resources. @JacekLaskowski
- 12. Problems (to be?) solved @JacekLaskowski
- 13. Problems (to be?) solved How can you know the type exists? (visibility) @JacekLaskowski
- 14. Problems (to be?) solved How can you know the type exists? (visibility) What about the available methods? (versioning) @JacekLaskowski
- 15. Problems (to be?) solved How can you know the type exists? (visibility) How are the parts integrated? What about the available methods? (versioning) @JacekLaskowski
- 16. @JacekLaskowski
- 17. Demo Time @JacekLaskowski
- 18. Open questions @JacekLaskowski
- 19. Open questions • Difference between Maven and OSGi Blueprint @JacekLaskowski
- 20. Open questions • Difference between Maven and OSGi Blueprint • build-time vs runtime @JacekLaskowski
- 21. Open questions • Difference between Maven and OSGi Blueprint • build-time vs runtime • Maven brings the libs to the app and bundles them @JacekLaskowski
- 22. Open questions • Difference between Maven and OSGi Blueprint • build-time vs runtime • Maven brings the libs to the app and bundles them • Do you need to include the libs inside the app if they’re available at runtime? @JacekLaskowski
- 23. Thanks for listening Questions? @JacekLaskowski http://blog.japila.pl