OSGi DevCon 2010 Review

Neil Bartlett

With Thanks...

Themes

Enterprise OSGi

Sun, Oracle and Jigsaw

Tooling

Future of App Servers

Cloud Computing

News

OSGi Enterprise Specification

Released

JNDI

JDBC

JMX

JPA

JTA

Web Container

Blueprint

Remote Services

Remote Services Admin

SCA

Enterprise Release

Next Release...?JCA

Asynchronous Services

JMS

META-INF/services

JAAS

OBR

Command Shell

Config Admin extensions

Multiple Extenders

JPA weaving

Sun/Oracle Keynote

Sun/Oracle Keynote

Re-iterated commitment to OSGi :-)

Re-iterated commitment to Jigsaw :-(

First public mention of “Java Module System Framework”

a.k.a. Qwylt

Image Credit: SXC.hu

Qwylt

APIs for interacting with modules

SPIs for building module systems

Platform for sharing classes between module systems

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.

Cons

No common module format

Library authors targeting both module systems will have to compile, build and test twice.

Getting Involved

Qwylt discussions likely to be held within a resurrected JSR 277

Though this requires resurrecting the JCP itself...

OSGi Cloud Computing Workshop

Tycho Moving to Eclipse

Tycho

PDE gets a proper build system

“Manifest first” vs “POM first”

Already used by EGit & others

Interesting Talks

OSGi Best and Worst Practices

OSGi Best and Worst...

Paul Vanderlei, Martin Lippert, Jeff McAffer, Chris Aniszczyk

OSGi Best and Worst...

Don’t Program OSGi (use DS instead!)

Use Import-Package (not Require-Bundle!)

Mind your versions

Modular Architecture

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

Feedback

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

OSGi Shells

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

Paremus Nimble

Shell and provisioning system

Understands service dependencies, not just imports/requires.

Not open source, but free to use(renewable licence)

Future of Application Servers Panel

Future of App Servers

Host: John Rymer (Forrester Research)

Panelists: Graham Charters (IBM), Glyn Normington (SpringSource), Greg Wilkins (Mortbay/Jetty), Oracle guy, JBoss guy.

Challenges

Cloud deployment

Reduced footprint

Modularity and “profiles”

Memorable Quotes

“Profiles are Rubbish!” – Greg Wilkins, Mortbay

Memorable Quotes

Panelists asked for 3 core focus for future of their product

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...”

ScalaModules

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.

ScalaModules

Size of the core Scala library was discussed: 4Mb

Clearly creates a barrier to adoption of Scala

Needs to be modularised!

OSGi Cloud Workshop

Battle Of The “Cloud Picture” Slides

Image Credit: NASA

OSGi Cloud WorkshopLots 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?