The document summarizes the OSGi DevCon 2010 conference. Key themes discussed included enterprise OSGi specifications, tools like Tycho moving to Eclipse, and the future of application servers and cloud computing with OSGi. Oracle discussed its new Java module system called Qwylt and how it may provide interoperability between OSGi and Jigsaw modules. Best practices for OSGi development were also covered.

1. OSGi DevCon 2010
Review
Neil Bartlett

2. With Thanks...

3. Themes
Enterprise OSGi
Sun, Oracle and Jigsaw
Tooling
Future of App Servers
Cloud Computing

4. News

5. OSGi Enterprise
Specification
Released

6. Enterprise Release
JNDI Blueprint
JDBC Remote Services
JMX Remote Services
Admin
JPA
SCA
JTA
Web Container

7. Next Release...?
JCA OBR
Asynchronous Command Shell
Services
Config Admin
JMS extensions
META-INF/services Multiple Extenders
JAAS JPA weaving

8. Sun/Oracle Keynote

9. Sun/Oracle Keynote
Re-iterated commitment to OSGi :-)
Re-iterated commitment to Jigsaw :-(
First public mention of “Java Module
System Framework”

10. a.k.a. Qwylt
Image Credit: SXC.hu

11. Qwylt
APIs for interacting with modules
SPIs for building module systems
Platform for sharing classes between
module systems

12. Pros
Seems to offer interop between OSGi and
Jigsaw at runtime
Oracle claim to have implemented 90% of
OSGi on Qwylt (“Lyra”), based on Felix
code.

13. Cons
No common module format
Library authors targeting both module
systems will have to compile, build and
test twice.

14. Getting Involved
Qwylt discussions likely to be held
within a resurrected JSR 277
Though this requires resurrecting the
JCP itself...

15. OSGi Cloud Computing
Workshop

16. Tycho Moving to
Eclipse

17. Tycho
PDE gets a proper build system
“Manifest first” vs “POM first”
Already used by EGit & others

18. Interesting Talks

19. OSGi Best and Worst
Practices

20. OSGi Best and Worst...
Paul Vanderlei, Martin Lippert, Jeff
McAffer, Chris Aniszczyk

21. OSGi Best and Worst...
Don’t Program OSGi (use DS instead!)
Use Import-Package (not Require-
Bundle!)
Mind your versions

22. Modular Architecture

23. Modular Architecture
Kirk Knoernschild, Neil Bartlett
Tutorial format: high level architecture
from Kirk, low level details from me
Focus on DS and simplicity seemed to
go down well

24. Feedback
“This presentation epitomises everyone
[sic] that is wrong with software
architecture. Nonesense [sic]” –
Anonymous

25. OSGi Shells

26. OSGi Shells
Robert Dunne (Paremus)
Current situation is annoying for
writers of tutorials & other docs
Existing shells are underpowered
RFC 147 describes the new standard
shell, GoGo is a prototype

27. Paremus Nimble
Shell and provisioning system
Understands service dependencies, not
just imports/requires.
Not open source, but free to use
(renewable licence)

28. Future of Application
Servers Panel

29. Future of App Servers
Host: John Rymer (Forrester Research)
Panelists: Graham Charters (IBM),
Glyn Normington (SpringSource),
Greg Wilkins (Mortbay/Jetty), Oracle
guy, JBoss guy.

30. Challenges
Cloud deployment
Reduced footprint
Modularity and “profiles”

31. Memorable Quotes
“Profiles are Rubbish!” – Greg Wilkins,
Mortbay

32. Memorable Quotes
Panelists asked for 3 core focus for
future of their product

33. Graham Charters (IBM)
“Enabling the OSGi development model
in the enterprise...”
“Enabling the OSGi development model
in the enterprise...”
and
“Enabling the OSGi development model
in the enterprise...”

34. ScalaModules

35. ScalaModules
A DSL to ease development with OSGi
services
Complements DS, Blueprint etc
Gives access to full power of low-level
APIs...
but much easier & safer to use.

36. ScalaModules
Size of the core Scala library was
discussed: 4Mb
Clearly creates a barrier to adoption of
Scala
Needs to be modularised!

37. OSGi Cloud Workshop

38. Battle Of The “Cloud
Picture” Slides

39. Image Credit: NASA

40. OSGi Cloud Workshop
Lots of participants!
Key Question:
What needs to be specified, vs “value
added” features that vendors may
implement?
Likelihood of a new “Cloud Expert
Group” in the near future?