What’s cool in the new and updated OSGi specs (DS, Cloud and more) - David Bosschaert, Carsten...

Carsten Ziegeler

David Bosschaert

What's cool in the new and updated

OSGi Specs

What's cool in the new and updated OSGi specs file:///Users/david/clones/ece2013/eclipsecon.html?print

1 of 50 28/10/2013 07:56

Speakers

David Bosschaert (david@redhat.com)

⦿ JBoss/Fuse at Red Hat

⦿ Co-chair OSGi EEG

⦿ Open-source and cloud enthusiast

Carsten Ziegeler (cziegeler@apache.org)

⦿ RnD Adobe Research Switzerland

⦿ OSGi CPEG and EEG Member

⦿ ASF member

2 of 50 28/10/2013 07:56

Agenda⦿ Framework updates

⦿ OSGi/CDI integration

⦿ Repository update

⦿ Declarative Services

⦿ Http Service

⦿ Cloud

⦿ Portable Java Contracts

⦿ Semantic Versioning Annotations

⦿ Other spec updates

3 of 50 28/10/2013 07:56

Framework Updates

Service Scopes (RFC 195)⦿ Service Scopes: singleton, bundle, prototype

⦿ Driver: Support for EEG specs (EJB, CDI)

⦿ Usage in other spec updates

⦿ New PrototypeServiceFactory

4 of 50 28/10/2013 07:56

PrototypeServiceFactory

ppuubblliicc iinntteerrffaaccee PPrroottoottyyppeeSSeerrvviicceeFFaaccttoorryy<S>

eexxtteennddss SSeerrvviicceeFFaaccttoorryy<S> {

S getService(BBuunnddllee bundle,

SSeerrvviicceeRReeggiissttrraattiioonn<S> registration);

vvooiidd ungetService(BBuunnddllee bundle,

SSeerrvviicceeRReeggiissttrraattiioonn<S> registration,

S service);

5 of 50 28/10/2013 07:56

New method in BundleContext:ppuubblliicc iinntteerrffaaccee BBuunnddlleeCCoonntteexxtt {

<S> SSeerrvviicceeOObbjjeeccttss<S> getServiceObjects(SSeerrvviicceeRReeffeerreennccee<S> rreeff);

New Interface ServiceObjects:ppuubblliicc iinntteerrffaaccee SSeerrvviicceeOObbjjeeccttss<S> {

S getService();

vvooiidd ungetService(S service);

6 of 50 28/10/2013 07:56

DataTransferObjects

7 of 50 28/10/2013 07:56

RFC 185 – Data Transfer Objects⦿ Defines a DTO model for OSGi⦿ Serializable/Deserializable objects

⦿ Use cases: REST, JMX, Web Console...

⦿ To be adopted by other specs

8 of 50 28/10/2013 07:56

RFC 185 – Data Transfer ObjectsGetting DTOs: adapter patternppuubblliicc ccllaassss BBuunnddlleeDDTTOO eexxtteennddss org.osgi.dto.DTO {

ppuubblliicc lloonngg id;

ppuubblliicc lloonngg lastModified;

ppuubblliicc iinntt state;

ppuubblliicc SSttrriinngg symbolicName;

ppuubblliicc SSttrriinngg version;

9 of 50 28/10/2013 07:56

RFC 185 – Data Transfer ObjectsDTOs for the OSGi framework

⦿ FrameworkDTO

⦿ BundleDTO

⦿ ServiceReferenceDTO

⦿ BundleStartLevelDTO, FrameworkStartLevelDTO

⦿ CapabilityDTO, RequirementDTO, ResourceDTO

⦿ BundleWiringsDTO, etc

10 of 50 28/10/2013 07:56

OSGi/CDIintegration

11 of 50 28/10/2013 07:56

RFC 193 - CDI SupportBridging OSGi and standard JavaEE

dependency model

● Publishing CDI beans as OSGi services

● Injecting OSGi services in CDI beansCDI = Contexts and dependency injection

12 of 50 28/10/2013 07:56

RFC 193 - Examples● Publishing CDI bean as OSGi service@Component

ppuubblliicc ccllaassss MMyyCCoommppoonneenntt iimmpplleemmeennttss MMyyIInntteerrffaaccee { ... }

● Dependency Injection@Inject

@Service

pprriivvaattee MMyyIInntteerrffaaccee serviceA;

@Inject

@Service(optional = ttrruuee)

pprriivvaattee MMyyIInntteerrffaaccee serviceB;

13 of 50 28/10/2013 07:56

Repository1.1

14 of 50 28/10/2013 07:56

OSGi Repository today

15 of 50 28/10/2013 07:56

Example Repository namespaces

16 of 50 28/10/2013 07:56

RFC 187 - Repository 1.1Existing repository powerful

but: limited to queries in a single namespace

New in RFC 187:Combine requirements spanning multiple namespaces:

RReeppoossiittoorryy repo = ... // Obtain from Service Registry

CCoolllleeccttiioonn<RReessoouurrccee> res = repo.findProviders(

repo.getExpressionCombiner().aanndd(

repo.newRequirementBuilder("osgi.wiring.package").

addDirective("filter","(osgi.wiring.package=foo.pkg1)").

buildExpression(),

repo.newRequirementBuilder("osgi.identity").

addDirective("filter",

"(license=http://opensource.org/licenses/Apache-2.0)").

buildExpression()));

17 of 50 28/10/2013 07:56

DeclarativeServices

18 of 50 28/10/2013 07:56

RFC 190 - Declarative Services

Enhancements⦿ Support of service scopes

⦿ Diagnostic API

⦿ DTOs

⦿ But most importantly...

19 of 50 28/10/2013 07:56

Use annotations for

configuration...@interface MMyyCCoonnffiigg {

bboooolleeaann enabled() ddeeffaauulltt ttrruuee;

SSttrriinngg[] topic() ddeeffaauulltt {"topicA", "topicB"};

SSttrriinngg userName();

iinntt service_ranking() ddeeffaauulltt 15;

20 of 50 28/10/2013 07:56

...and reference them in

lifecycle methods@Component

ppuubblliicc ccllaassss MMyyCCoommppoonneenntt {

SSttrriinngg userName;

SSttrriinngg[] topics;

@Activate

pprrootteecctteedd vvooiidd activate(ffiinnaall MMyyCCoonnffiigg config) {

iiff ( config.enabled() ) {

tthhiiss.userName = config.userName();

tthhiiss.topics = config.topic();

21 of 50 28/10/2013 07:56

...or even simpler...@Component

ppuubblliicc ccllaassss MMyyCCoommppoonneenntt {

pprriivvaattee MMyyCCoonnffiigg configuration;

@Activate

pprrootteecctteedd vvooiidd activate(ffiinnaall MMyyCCoonnffiigg config) {

iiff ( config.enabled() ) {

tthhiiss.configuration = config;

22 of 50 28/10/2013 07:56

Annotation Mapping⦿ Fields registered as component

properties

⦿ Name mapping (_ -> .)

⦿ Type mapping for configurations

23 of 50 28/10/2013 07:56

Mapping@interface MMyyCCoonnffiigg {

bboooolleeaann enabled() ddeeffaauulltt ttrruuee;

SSttrriinngg[] topic() ddeeffaauulltt {"topicA", "topicB"};

SSttrriinngg userName();

iinntt service_ranking() ddeeffaauulltt 15;

24 of 50 28/10/2013 07:56

RFC 190 - Declarative Services

Enhancements⦿ Annotation configuration support

⦿ Support of service scopes

⦿ Diagnostic API

⦿ DTOs

25 of 50 28/10/2013 07:56

HTTPService

26 of 50 28/10/2013 07:56

RFC 189 - Http Service

Update⦿ Update to Servlet API 3+

⦿ Whiteboard support for

Servlets, Servlet Filters

Listeners, Resources and HttpContexts

⦿ and DTOs

27 of 50 28/10/2013 07:56

Whiteboard Servlet Registration@Component(service = javax.servlet.SSeerrvvlleett.ccllaassss,

scope="PROTOTYPE",

pprrooppeerrttyy={

"osgi.http.whiteboard.servlet.pattern=/products/*",

ppuubblliicc ccllaassss MMyySSeerrvvlleett eexxtteennddss HHttttppSSeerrvvlleett {

28 of 50 28/10/2013 07:56

Whiteboard Servlet Filter

Registration@Component(service = javax.servlet.FFiilltteerr.ccllaassss,

scope="PROTOTYPE",

pprrooppeerrttyy={

"osgi.http.whiteboard.filter.pattern=/products/*",

ppuubblliicc ccllaassss MMyyFFiilltteerr iimmpplleemmeennttss FFiilltteerr {

29 of 50 28/10/2013 07:56

Additional Support⦿ Most listener types are supported

Register with their interface

⦿ Error Pages and Resources

⦿ Shared HttpContexts

⦿ Target Http Service

30 of 50 28/10/2013 07:56

CloudWhat's cool in the new and updated OSGi specs file:///Users/david/clones/ece2013/eclipsecon.html?print

31 of 50 28/10/2013 07:56

Current PaaS offerings...

32 of 50 28/10/2013 07:56

OSGi Cloud Ecosystems PaaS

33 of 50 28/10/2013 07:56

An OSGi cloud ecosystem...⦿ Many frameworks

○ hosting a variety of deployments

⦿ Together providing The Application

⦿ Not a bunch of replicas ○ rather a collection of different nodes

○ with different roles working together

○ some may be replicas

⦿ Load varies over time

⦿ ... and so does your cloud system ○ topology

○ configuration

○ number of nodes

○ depending on the demand

34 of 50 28/10/2013 07:56

To realize this you need...⦿ Information!

○ need to know what nodes are available

○ ability to react to changes

⦿ Provisioning capability

⦿ Remote invocation ○ inside your cloud system

○ to get nodes to communicate

○ either directly...

○ ... or as a means to set up communication channels

35 of 50 28/10/2013 07:56

RFC 183 - Cloud EcosystemsFFrraammeewwoorrkkNNooddeeSSttaattuuss service:

information about each Cloud node

accessible as a Remote Service

throughout the ecosystem

Information such as:Hostname/IP address

Location (country etc)

OSGi and Java version running

A REST management URL

Runtime metadataAvailable memory / disk space

Load measurement

... you can add custom metadata too ...

36 of 50 28/10/2013 07:56

FrameworkNodeStatus service properties

37 of 50 28/10/2013 07:56

RFC 182 - REST APIA cloud-friendly remote management API

works great with FrameworkNodeStatus

Example:addingService(SSeerrvviicceeRReeffeerreennccee<FFrraammeewwoorrkkNNooddeeSSttaattuuss> rreeff) {

// A new Node became available

SSttrriinngg url = rreeff.getProperty("org.osgi.node.rest.url");

RReessttCClliieenntt rc = nneeww RReessttCClliieenntt(nneeww URI(url));

// Provision the new node

rc.installBundle(...);

rc.startBundle(...);

38 of 50 28/10/2013 07:56

Additional ideas in RFC 183⦿ Special Remote Services config type・ osgi.configtype.ecosystem

・ defines supported Remote Service data types

・ not visible outside of cloud system

⦿ Ability to intercept remote service calls・ can provide different service for each client

・ can do invocation counting (quotas, billing)

⦿ Providing remote services meta-data・ quota exceeded

・ payment needed

・ maintenance scheduled

39 of 50 28/10/2013 07:56

Current OSGi cloud workProvides a base line

○ to build fluid cloud systems

○ portability across clouds

Where everything is dynamic

○ nodes can be repurposed

... and you deal with your cloud nodes

through OSGi services

40 of 50 28/10/2013 07:56

PortableJavaContracts

41 of 50 28/10/2013 07:56

Semantic Versioning...... is a versioning policy for exported packages.

OSGi versions: <major>.<minor>.<micro>.<qualifier>

Updating package versions:

● fix/patch (no change to API):

update micro

● extend API (affects implementers, not clients):

update minor

● API breakage:

update major

Note: not always used for bundle versions

42 of 50 28/10/2013 07:56

Semantic Versioning is great, but...

- not all projects use it, e.g. APIs from JSRs

- e.g. Servlet 3 is backward compatible with 2.5

- what's its javax.servlet package version?2.6 ?

or 3.0 ?

- different projects made different choices

43 of 50 28/10/2013 07:56

RFC 180: Portable Java Contracts

osgi.contract capability to the rescue

● client bundle requires capability with 'marketing' or 'spec' version

● and also imports the package without version osgi.contract provider binds the contract version to package versions

IImmppoorrtt-PPaacckkaaggee: javax.servlet, javax.servlet.http

RReeqquuiirree-CCaappaabbiilliittyy: osgi.contract;

filter:="(&(osgi.contract=JavaServlet)(version=3.0))"

Allows writing portable bundles that import non-semantically

versioned packages.

44 of 50 28/10/2013 07:56

Type andPackageAnnotations

45 of 50 28/10/2013 07:56

RFC 197 – OSGi Type and

Package Annotations⦿ Annotations for documenting semantic

versioning information⦿ Class retention annotations

⦿ @Version

⦿ @ProviderType

⦿ @ConsumerType

46 of 50 28/10/2013 07:56

OtherEnterpriseSpecupdates

47 of 50 28/10/2013 07:56

▻ Blueprint 1.1・ Non-damped service references

・ Grace period enhancements

・ Many small fixes

▻ Remote Service Admin 1.1・ Remote Service registration modification

▻ Subsystems 1.1・ Provide Deployment Manifest separately

・ Many small enhancements

48 of 50 28/10/2013 07:56

When can I get it?RFCs available to everyone today:

https://github.com/osgi/design

(https://github.com/osgi/design)

◎ Most work aimed at Core/Enterprise R6 (2014)

◎ Some specs in Enterprise R7 (2015)

49 of 50 28/10/2013 07:56

Questions?What's cool in the new and updated OSGi specs file:///Users/david/clones/ece2013/eclipsecon.html?print

50 of 50 28/10/2013 07:56

What’s cool in the new and updated OSGi specs (DS, Cloud and more) - David Bosschaert, Carsten...

Technology

Transcript of What’s cool in the new and updated OSGi specs (DS, Cloud and more) - David Bosschaert, Carsten...

OSGi Application Provisioning Deep Dive - QCon New York Provisioning Deep...About me David Bosschaert (davidb@apache.org) 㽋 Works at Adobe R&D Basel 㽋 Co-chair OSGi EEG 㽋 Apache

© copyright 2004 by OSGi Alliance All rights reserved. OSGi Pre Workshop Peter Kriens, OSGi Fellow.

OSGi Tutorial - Computer Sciencecs00pe/epl603/labs/osgi_tutorial.pdf · OSGi Tutorial A Step by Step Introduction to OSGi Programming Based on the Open Source Knopflerfish OSGi Framework

Distributed OSGi - OSGi DevCon - Eclipsecon 2011

OSGi DevCon 09 - OSGi on Scala

Security in OSGi applications: Robust OSGi Platforms, secure Bundles

Distributed Eventing in OSGi - Carsten Ziegeler

AQute OSGi Bootcamp Workshop Exercise By Peter Kriens CEO aQute OSGi Technology Officer and OSGi Fellow.

OSGi Community Event 2010 - OSGi and Android

JAoo2009-OSGi on the Server · 2009. 10. 6. · OSGi in Action • Eclipse ... • Add an OSGi manifest to the WAR fileAdd an OSGi manifest to the WAR file And it becomes an OSGi

Dockerizing apps for the Deployment Platform of the Month with OSGi - David Bosschaert & Carsten Ziegeler

What’s cool in the new and updated OSGi specs (DS, Cloud and more) - C Ziegeler & D Bosschaert

OSGi Community Event 2010 - OSGi ME - An OSGi Profile for Embedded Devices

FT-OSGi: Fault Tolerant Extensions to the OSGi Service ...

Monitoring OSGi Applications with the Web Console - Carsten Ziegeler

FT-OSGi: Fault-Tolerance extensions for the OSGi … · FT-OSGi: Fault-Tolerance extensions for the OSGi ... 3.2 Building Blocks ... reusable and collaborative components. The OSGi

OSGi and SOA - WSO2 | The Open Source Technology for ... · OSGi and SOA Understanding how OSGi ... puzzle was available as OSGi components: ... com/2008/10/osgi-bundle-start-levels.html

Managing your application with Apache Sling Launchpad ......Managing your application with Apache Sling Launchpad and OSGi Installer Carsten Ziegeler cziegeler@apache.org .adaptTo

The OSGi R5 Enterprise Release - EclipseCon France2018 · The OSGi R5 Enterprise Release David Bosschaert, ... o JMX Management Model ... • hard to get working in general OSGi ServiceLoader

OSGi Community Event 2010 - Experiences with OSGi in Industrial Applications