virgo 3.0 from osgi community event 2011 at darmstadt

PowerPoint-Prsentation

Virgo 3.0
What's New!

Christopher Frost

SpringSource, a division of VMware

21st September 2011

OSGi Alliance Marketing 2008-2010 . All Rights Reserved

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OSGi Alliance Community Event 2011 2008-2011. All Rights Reserved

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Agenda

Extra Modular with Regions

Virgo 3.0 What New

Snaps

Virgo & OSGi Tooling

Coming Soon

Questions


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Regions Background

Module granularity: Class, Bundle, ?

Need higher level scoping construct than a bundle

Simpler management of large applications

[see Subsystems RFC 152 for more background]


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Regions Scoping in Virgo

Region scoping - Kernel Space vs User Space

Application scopingPARs and scoped Plans

Metadata rewriting for bundle/package scoping

Service registry hooks for service scoping


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Regions Composite Bundles & Nested Frameworks

Idea to make a group of bundles like a single bundle

Explored by OSGi

Prototyped in Equinox

Exploited in Virgo 2.1.x

Difficulty standardising in a framework neutral way

Spec [RFC 138] replaced by framework hooks

Equinox prototype deprecated


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Regions Framework Hooks

Resolver hook, bundle find/event hooks [see R4.3 core spec for details]

Similar to service registry find/event hooks which do the same for services

Control the visibility of bundles, packages, generic capabilities


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Regions Hook Usability

Service Find and Event hooks

Bundle Resolver, Find and Event hooks

Hard to ensure consistent behaviour across hooks

Need higher level abstraction

Region digraph


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Regions Region Digraph

A directed graph of "regions"

A region is a group of bundles

Regions may be connected by directed arcs

Each directed arc has a filter which controls visibility:bundles

packages

services

generic capabilities


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Regions Region Digraph (cont.)

Developed as part of Virgo

Formal model in Z

Seen to be useful outside Virgo

Moved to Equinox

Used by Virgo 3.0

Likely to be used by Apache Aries


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Regions & Subsystems

OSGi standard multi-bundle scoping mechanism

Work in progress (Grahams Talk earlier), public draft soon

Inspired byVirgo regions & scopes

Apache Aries applications

Apache Felix Karaf features

Newton systems

Eclipse features

Deployment Admin deployment packages

Virgo likely to implement subsystems in a future release


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Virgo 3.0 Regions


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Virgo 3.0 What's new

Snaps gets its first release

Servlet 3.0 with Tomcat 7.x

Gemini.Web, strict compliance to OSGi web container spec

Jetty version

Regions have replaced Nested Frameworks

New Shell based on Apache GoGo

Updated sample application, Greenpages

Spring 3.0.5.RELEASE & Equinox Indigo

Declarative Service & Log Service support

Lots of Bugfixes etc...


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Virgo 3.0 Demo


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Snaps Modular Web Apps

Some features tidied up

Documentation written

Single sample app showing everything Snaps can do

All available in a Zip from the Virgo website


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Snaps Basics

Lots of Snaps (Web Application Bundles)

Snaps have the hosts ServletContext

Uses a filter to dispatch requests from the host

Everything else is business as normal


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Snaps Nested Context Paths

/app/orders /app/billing


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Snaps A filter for Snaps

Still just web.xml

Define the subpath for Snaps with a filter


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Snaps Manifest

Attaching Snaps to hosts


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Snaps Taglibs

JSP tag to look up slices & their properties


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Snaps Host Properties

Looking up resources & properties from the host


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Snaps Demo


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Virgo Tooling

Donated to Eclipse Virgo and Libra

Tooling - 1st milestone, lots still changing

The Dependency on STS/Spring IDE is going

Bundlor Manifest generation tool

To have a play, see http://wiki.eclipse.org/Virgo/Tooling


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Virgo Future

New Web Admin Console

P2 integration

Subsystems

Tooling

Cloud

???


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Questions

21.09.11

OSGi Alliance 2008-2011 . All Rights Reserved

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COPYRIGHT 2008-2011 OSGi Alliance. All Rights Reserved

Date 21.09.11

OSGi Alliance Marketing 2008-2010 . All Rights Reserved

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virgo 3.0 from osgi community event 2011 at darmstadt

Technology