Nuxeo Runtime 2
recent and future work
Bogdan Stefanescu |

Overview
● What's Nuxeo Runtime?
● Requirements
● Components
● Extensions
● What's next?
● HK2 adoption
● Dependency injection
● More Annotations
● Hot Deployment ?

What's Nuxeo Runtime?
● Nuxeo Runtime is the Nuxeo micro kernel.
● The foundation of all Nuxeo applications
● Nuxeo EP, Nuxeo RCP, Nuxeo WebEngine, Nuxeo
Shell etc.
● Provides a modules subsystem
● OSGI compatible modules (aka bundles)
● Provides a component model
● Inspired from OSGI descriptive components
● Provides an extension point model
● Provides a service model

Nuxeo Runtime - Requirements
● Nuxeo Runtime was designed to fulfill the
following requirements:
● Applications are made from components.
● Be able to assemble new applications from specific
set of components.
● Be able to add / remove components into an
(optionally running) application.
● Be able to deploy and run modules in any OSGi
framework.
● Provide an extension mechanism for
components.

Nuxeo Runtime - Components
● Modules are implemented as OSGi bundles
● A module may provide zero or more
components
● Nuxeo Components are very similar to OSGi
components
● Components are described through XML files.
● Components are declared in the module
MANIFEST file
● Components provides zero or more services

Nuxeo Runtime – Extensions
● Components may expose multiple extension
points to let other components extend it
● Components may contribute any number of
extensions to other components
● An Extension Point is an abstract concept
● You can see it as a registry of things
● Extensions are declared using XML
● XML fragments are mapped to real Java Objects
and registered against the target extension point

Nuxeo Runtime – Deployment

Nuxeo Runtime – Extensibility
Editors
Actions
Views
Serializers
MyExtensionPoint

What's next?
● Rewriting Nuxeo Runtime on top of HK2
● HK2 is the micro kernel of GlassFish v3
● HK2 is very similar with Nuxeo Runtime
● HK2 cool features:
● Able to run in any OSGi framework
● Provide dependency injection through annotations
● Services are declared using annotations
● HK2 missing features:
● Extension Points are missing from HK2! :-(

Nuxeo Runtime - HK2
● How extension point issue can be solved?
● Already in contact with Sun HK2 developers
● We will contribute to HK2 an extension point
mechanism
● Nuxeo Runtime will be an HK2 module
● That will add an extension points mechanism
● That will preserve compatibility with existing model
● Nuxeo Modules will still be packaged as OSGi
bundles

Nuxeo Runtime - Future
So, what Nuxeo Runtime 2 will provide?
● OSGi compatible modules
● Extension Points declared through annotations
● Extensions declared as XML fragments
● Services declared through annotations
● Dependency injection through annotations
● No more XML to declare things
● Only pure configuration will be stored as XML
● An HK2 micro kernel

Nuxeo Runtime – Is that all?
●
●
●
● Hot Deployment of Modules?

Thank you!