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OSGi Community Event 2013 (http://www.osgi.org/CommunityEvent2013/Schedule) ABSTRACT Carsten and David will look at new and updated OSGi specs that are in the works. Developing components has never been easier. Learn more about the new Prototype Service Factory, OSGi/CDI integration and the improved annotation support for Declarative Services. Many people are realizing that OSGi is a great foundation technology for fluid cloud-computing architectures where the deployments change dynamically and applications don't simply scale by duplicating the entire VMs but by providing extra capacity exactly to those components that need it. Work is being done to create standards that facilitate such a portable OSGi cloud in ‘Cloud Ecosystems’ and the REST API specs. Learn more about these and other upcoming specs during this talk. SPEAKER BIOS David Bosschaert David Bosschaert, Principal Software Engineer at Red Hat, spends the majority of his time on the JBoss OSGi framework, JBoss AS7, Apache Aries and other open source projects. He is also co-chair of the OSGi Enterprise Expert Group and an active participant in the OSGi Cloud efforts. Before joining JBoss/Red Hat in 2010, David worked for IONA Technologies and Progress Software in Dublin, Ireland. Carsten Ziegeler Carsten Ziegeler is senior developer at Adobe Research Switzerland and spends most of his time on architectural and infrastructure topics. Working for over 25 years in open source projects, Carsten is a member of the Apache Software Foundation and heavily participates in several Apache communities including Sling, Felix and ACE. He is a frequent speaker on technology and open source conferences and participates in the OSGi Core Platform and Enterprise expert groups.
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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
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Speakers
David Bosschaert ([email protected])
⦿ JBoss/Fuse at Red Hat
⦿ Co-chair OSGi EEG
⦿ Open-source and cloud enthusiast
Carsten Ziegeler ([email protected])
⦿ RnD Adobe Research Switzerland
⦿ OSGi CPEG and EEG Member
⦿ ASF member
What's cool in the new and updated OSGi specs file:///Users/david/clones/ece2013/eclipsecon.html?print
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Agenda⦿ Framework updates
⦿ OSGi/CDI integration
⦿ Repository update
⦿ Declarative Services
⦿ Http Service
⦿ Cloud
⦿ Portable Java Contracts
⦿ Semantic Versioning Annotations
⦿ Other spec updates
What's cool in the new and updated OSGi specs file:///Users/david/clones/ece2013/eclipsecon.html?print
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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
What's cool in the new and updated OSGi specs file:///Users/david/clones/ece2013/eclipsecon.html?print
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PrototypeServiceFactory
ppuubblliicc iinntteerrffaaccee PPrroottoottyyppeeSSeerrvviicceeFFaaccttoorryy<S>
eexxtteennddss SSeerrvviicceeFFaaccttoorryy<S> {
S getService(BBuunnddllee bundle,
SSeerrvviicceeRReeggiissttrraattiioonn<S> registration);
vvooiidd ungetService(BBuunnddllee bundle,
SSeerrvviicceeRReeggiissttrraattiioonn<S> registration,
S service);
}
What's cool in the new and updated OSGi specs file:///Users/david/clones/ece2013/eclipsecon.html?print
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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);
}
What's cool in the new and updated OSGi specs file:///Users/david/clones/ece2013/eclipsecon.html?print
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DataTransferObjects
What's cool in the new and updated OSGi specs file:///Users/david/clones/ece2013/eclipsecon.html?print
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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
What's cool in the new and updated OSGi specs file:///Users/david/clones/ece2013/eclipsecon.html?print
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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;
}
What's cool in the new and updated OSGi specs file:///Users/david/clones/ece2013/eclipsecon.html?print
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RFC 185 – Data Transfer ObjectsDTOs for the OSGi framework
⦿ FrameworkDTO
⦿ BundleDTO
⦿ ServiceReferenceDTO
⦿ BundleStartLevelDTO, FrameworkStartLevelDTO
⦿ CapabilityDTO, RequirementDTO, ResourceDTO
⦿ BundleWiringsDTO, etc
What's cool in the new and updated OSGi specs file:///Users/david/clones/ece2013/eclipsecon.html?print
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OSGi/CDIintegration
What's cool in the new and updated OSGi specs file:///Users/david/clones/ece2013/eclipsecon.html?print
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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
What's cool in the new and updated OSGi specs file:///Users/david/clones/ece2013/eclipsecon.html?print
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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;
What's cool in the new and updated OSGi specs file:///Users/david/clones/ece2013/eclipsecon.html?print
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Repository1.1
What's cool in the new and updated OSGi specs file:///Users/david/clones/ece2013/eclipsecon.html?print
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OSGi Repository today
What's cool in the new and updated OSGi specs file:///Users/david/clones/ece2013/eclipsecon.html?print
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Example Repository namespaces
What's cool in the new and updated OSGi specs file:///Users/david/clones/ece2013/eclipsecon.html?print
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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()));
What's cool in the new and updated OSGi specs file:///Users/david/clones/ece2013/eclipsecon.html?print
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DeclarativeServices
What's cool in the new and updated OSGi specs file:///Users/david/clones/ece2013/eclipsecon.html?print
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RFC 190 - Declarative Services
Enhancements⦿ Support of service scopes
⦿ Diagnostic API
⦿ DTOs
⦿ But most importantly...
What's cool in the new and updated OSGi specs file:///Users/david/clones/ece2013/eclipsecon.html?print
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Use annotations for
configuration...@interface MMyyCCoonnffiigg {
bboooolleeaann enabled() ddeeffaauulltt ttrruuee;
SSttrriinngg[] topic() ddeeffaauulltt {"topicA", "topicB"};
SSttrriinngg userName();
iinntt service_ranking() ddeeffaauulltt 15;
}
What's cool in the new and updated OSGi specs file:///Users/david/clones/ece2013/eclipsecon.html?print
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...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();
}
}
}
What's cool in the new and updated OSGi specs file:///Users/david/clones/ece2013/eclipsecon.html?print
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...or even simpler...@Component
ppuubblliicc ccllaassss MMyyCCoommppoonneenntt {
pprriivvaattee MMyyCCoonnffiigg configuration;
@Activate
pprrootteecctteedd vvooiidd activate(ffiinnaall MMyyCCoonnffiigg config) {
iiff ( config.enabled() ) {
tthhiiss.configuration = config;
}
}
}
What's cool in the new and updated OSGi specs file:///Users/david/clones/ece2013/eclipsecon.html?print
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Annotation Mapping⦿ Fields registered as component
properties
⦿ Name mapping (_ -> .)
⦿ Type mapping for configurations
What's cool in the new and updated OSGi specs file:///Users/david/clones/ece2013/eclipsecon.html?print
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Mapping@interface MMyyCCoonnffiigg {
bboooolleeaann enabled() ddeeffaauulltt ttrruuee;
SSttrriinngg[] topic() ddeeffaauulltt {"topicA", "topicB"};
SSttrriinngg userName();
iinntt service_ranking() ddeeffaauulltt 15;
}
What's cool in the new and updated OSGi specs file:///Users/david/clones/ece2013/eclipsecon.html?print
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RFC 190 - Declarative Services
Enhancements⦿ Annotation configuration support
⦿ Support of service scopes
⦿ Diagnostic API
⦿ DTOs
What's cool in the new and updated OSGi specs file:///Users/david/clones/ece2013/eclipsecon.html?print
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HTTPService
What's cool in the new and updated OSGi specs file:///Users/david/clones/ece2013/eclipsecon.html?print
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RFC 189 - Http Service
Update⦿ Update to Servlet API 3+
⦿ Whiteboard support for
Servlets, Servlet Filters
Listeners, Resources and HttpContexts
⦿ and DTOs
What's cool in the new and updated OSGi specs file:///Users/david/clones/ece2013/eclipsecon.html?print
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Whiteboard Servlet Registration@Component(service = javax.servlet.SSeerrvvlleett.ccllaassss,
scope="PROTOTYPE",
pprrooppeerrttyy={
"osgi.http.whiteboard.servlet.pattern=/products/*",
})
ppuubblliicc ccllaassss MMyySSeerrvvlleett eexxtteennddss HHttttppSSeerrvvlleett {
...
}
What's cool in the new and updated OSGi specs file:///Users/david/clones/ece2013/eclipsecon.html?print
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Whiteboard Servlet Filter
Registration@Component(service = javax.servlet.FFiilltteerr.ccllaassss,
scope="PROTOTYPE",
pprrooppeerrttyy={
"osgi.http.whiteboard.filter.pattern=/products/*",
})
ppuubblliicc ccllaassss MMyyFFiilltteerr iimmpplleemmeennttss FFiilltteerr {
...
}
What's cool in the new and updated OSGi specs file:///Users/david/clones/ece2013/eclipsecon.html?print
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Additional Support⦿ Most listener types are supported
Register with their interface
⦿ Error Pages and Resources
⦿ Shared HttpContexts
⦿ Target Http Service
What's cool in the new and updated OSGi specs file:///Users/david/clones/ece2013/eclipsecon.html?print
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CloudWhat's cool in the new and updated OSGi specs file:///Users/david/clones/ece2013/eclipsecon.html?print
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Current PaaS offerings...
What's cool in the new and updated OSGi specs file:///Users/david/clones/ece2013/eclipsecon.html?print
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OSGi Cloud Ecosystems PaaS
What's cool in the new and updated OSGi specs file:///Users/david/clones/ece2013/eclipsecon.html?print
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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
What's cool in the new and updated OSGi specs file:///Users/david/clones/ece2013/eclipsecon.html?print
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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
What's cool in the new and updated OSGi specs file:///Users/david/clones/ece2013/eclipsecon.html?print
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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 ...
What's cool in the new and updated OSGi specs file:///Users/david/clones/ece2013/eclipsecon.html?print
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FrameworkNodeStatus service properties
What's cool in the new and updated OSGi specs file:///Users/david/clones/ece2013/eclipsecon.html?print
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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(...);
}
What's cool in the new and updated OSGi specs file:///Users/david/clones/ece2013/eclipsecon.html?print
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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
What's cool in the new and updated OSGi specs file:///Users/david/clones/ece2013/eclipsecon.html?print
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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
What's cool in the new and updated OSGi specs file:///Users/david/clones/ece2013/eclipsecon.html?print
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PortableJavaContracts
What's cool in the new and updated OSGi specs file:///Users/david/clones/ece2013/eclipsecon.html?print
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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
What's cool in the new and updated OSGi specs file:///Users/david/clones/ece2013/eclipsecon.html?print
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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
What's cool in the new and updated OSGi specs file:///Users/david/clones/ece2013/eclipsecon.html?print
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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.
What's cool in the new and updated OSGi specs file:///Users/david/clones/ece2013/eclipsecon.html?print
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Type andPackageAnnotations
What's cool in the new and updated OSGi specs file:///Users/david/clones/ece2013/eclipsecon.html?print
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RFC 197 – OSGi Type and
Package Annotations⦿ Annotations for documenting semantic
versioning information⦿ Class retention annotations
⦿ @Version
⦿ @ProviderType
⦿ @ConsumerType
What's cool in the new and updated OSGi specs file:///Users/david/clones/ece2013/eclipsecon.html?print
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OtherEnterpriseSpecupdates
What's cool in the new and updated OSGi specs file:///Users/david/clones/ece2013/eclipsecon.html?print
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▻ 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
What's cool in the new and updated OSGi specs file:///Users/david/clones/ece2013/eclipsecon.html?print
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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)
What's cool in the new and updated OSGi specs file:///Users/david/clones/ece2013/eclipsecon.html?print
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Questions?What's cool in the new and updated OSGi specs file:///Users/david/clones/ece2013/eclipsecon.html?print
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