EclipseCon FR : Ignite talks, OSGi Resolver in action
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Transcript of EclipseCon FR : Ignite talks, OSGi Resolver in action
© 2013 Peergreen, Confidential & Proprietary
285 seconds left
What do we do in Peergreen?
I’ll talk about …
© 2013 Peergreen, Confidential & Proprietary
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We need(for deployment at least …)
Efficiency(multi-core architectures)
Heterogeneity(different kind of artifacts) Ease of use
© 2013 Peergreen, Confidential & Proprietary
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Specification:OSGi Resolver 1.0
• Part of OSGi Enterprise R5• Build relationships• Implemented in Apache Felix
Requirement“I want …”
Capability“I offer …”Resolver
Namespace + LDAP filter Namespace + attributes
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Resolver production• Wire(s) (satisfied requirements)• Or Exception (unsatisfied requirements)
Requirement CapabilityWire
Need Interpretation(use resources, make decisions, …)
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PeergreenDeployment System Goals
Efficient (multi-threading)
Resource Neutral
Plug-able architecture
Artifact Model
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ArtifactsName + URI
(File, Directory, Maven, …)
Resolver Resource(provides capabilities)
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FacetsSpecialized View
Artifact Decoration
(Webapp, Bundle, Configadmin, …)
Dictates Lifecycle(phase sequence)
Express Capability(when installed)
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PhasesExecution Controller
Logical Steps
(read-xml, install, start, stop, …)
Resolver Client(find compatible processors)
Pipeline / Parallel(execution)
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ProcessorsUnit of Work
Chained Together
(Transformer, Facet producer, …)
Resolver Resource(requirements, capabilities)
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High level view
Discovery Phase• Download• Scan• Find
dependencies
Execution Phase• Facet’s lifecycle• Concurrency
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@bundle
Execution phaseConcurrent Execution
(per facet lifecycle)
Multiple Artifacts(sharing same lifecycle)
Facet Decoration(on the fly)start
install
@webapp
start
configure
read-xml
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Processor ResolutionPer Phase
Resolving bound processor’s requirementsagainst artifact’s capabilities
Satisfied processors are executed
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InterpretationMissing Capabilities
(unsatisfied processors)
B
A
DC
E ?
Requires Sorting& Filtering
(linearize graph)
E C B
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Extensibility
OSGi ServicesFacet addition
Facet Lifecycle(phases definition)
New Processors
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ampl
eRequirements
Capability
Facet
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ModelQuery-able
Useful for Reporting
Introspection capabilities(facets, processors, execution times)
Store relations(transformations, creations, dependencies)
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plan
plan
web ejbjar
mvn
bundle
Artifact Tree
Report
Meta-information(root, report, …)
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BenefitsExtensibility
(new requirements and capabilities)
Dynamism(processors, facet and phases)
Ease of Use(extension development, deployment reporting)
Efficiency(maximize concurrency)
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ThanksFollow Us(@peergreeninfo)
Get your copy(M1 is there, M2 soon)
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