The document discusses the Eclipse Modeling Framework (EMF) and its integration with OSGi through a project called Gecko EMF, which facilitates model registration and isolation without singletons. It covers the use of registries, dynamic model registration, and the unique architecture of Gecko EMF that operates on plain OSGi. The document also highlights Gecko EMF's features, including service-based resources and support for various configurations.

1. Eclipse Modeling Framework
and plain OSGi the easy way
Mark Hoffmann
Data In Motion Consulting GmbH
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2. About Us
● Founded in 2010
● Located in Jena/Thuringia - Germany
● OSGi Contributing Associate Member
● OSGi / MDSD related company
● Consulting, Independent R&D, Development, Training,
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3. What are we talking about?
● EMF Registries
● EMF in Eclipse/Equinox environments
● EMF in Java-SE environments
● Gecko EMF - ResourceSet as a service
● Model Isolation
● No more singletons
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4. EMF Registries- What are they for?
● EPackage Registry
● ResourceFactory Registry
● Dynamic model registration
● Static registries for non-OSGi
● Registry based upon Equinox Extension Registry
● ResourceSet needs the registries
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5. EMF in Non-OSGi? No Problem!
● Uses static registry
● Self-registering EPackage
● Manual registration of EPackage and ResourceFactory
● Each new ResourceSet knows all models
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6. EMF’s home is Equinox
● Equinox OSGi Framework for Eclipse
● Core-Runtime means Equinox
● Extension registry and plugin.xml
● EMF generates Equinox based projects from GenModel
● OSGi mode for compatibility
● For other Frameworks use Equinox Supplement bundle
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7. Gecko EMF? Whats that?
● OpenSource project
● Idea of a Service-based EMF
● Handling of OSGi dynamics
● API and default implementation
● Genmodel Code Generator extension - Tooling
● Support for bnd projects
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8. Gecko EMF - How it works
● No Equinox dependencies, plain OSGi
● Whiteboard-based OSGi services for model registration
● Additional API for:
○ EPackageRegistry
○ ResourceFactoryRegistry
● ResourceSetFactory to create a ResourceSet
● ResourceSet as a service
● Handling of dynamics when un- / registering models
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9. Gecko EMF Features
● Default registry contains all models
● Isolated registry for a configurable filter
● Configurable dynamic configurator for loading ecore-files
● Create service for ResourceSetFactory
● Create service for ResoureSet
● Additional extensions available
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10. Showtime
Lets see what Gecko EMF can do for you
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11. Thanks for listening!
Resources:
Web: https://www.datainmotion.de
GeckoEMF: https://gitlab.com/gecko.io/geckoEMF
OSGi: https://osgi.org
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12. Questions?
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