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From "John Ross (JIRA)" <>
Subject [jira] [Created] (ARIES-748) Update subsystems to use Equinox impl of org.osgi.service.resolver.Resolver
Date Fri, 16 Sep 2011 20:20:08 GMT
Update subsystems to use Equinox impl of org.osgi.service.resolver.Resolver

                 Key: ARIES-748
             Project: Aries
          Issue Type: New Feature
          Components: Subsystem
            Reporter: John Ross
            Assignee: John Ross

The initial API and implementation of the Equinox org.osgi.service.resolver (RFC 112) is available
in the master branches of the rt.equinox.bundles and rt.equinox.framework git repositories.
I updated subsystems to make use of it. Previously, a quick and dirty Resolver adaptor wrapped
around the existing Felix OBR implementation was used. Note the subsystems impl uses a registered
Resolver service, so making use of the Equinox resolver simply meant adding the bundle to
the itests project. When Felix releases their implementation of org.osgi.service.resolver,
the two will (hopefully) be interchangeable.

Using the Equinox resolver highlighted some shortcomings in the subsystems implementation,
which were fixed and are listed below.

(1) Updated subsystem-itests to bring in the Equinox resolver.
(2) Updated SubsystemEnvironment to return all capabilities that match a requirement, even
those from the root subsystem (i.e. from the system bundle and any other already installed
bundles). Previously, Felix OBR had been automatically providing these via the Resolver adaptor
since Felix OBR has a built-in system repository. However, for the RFC 112 resolver, the expectation
is the Environment will provide everything.
(3) Fixed an issue where the resource -> subsystem relationship was not being established
for resources in the root subsystem causing an NPE.
(4) The FelixRequirementAdaptor must strip out the "mandatory:<*" clause from the filter
or InvalidSyntaxException occurs.
(5) OsgiIdentityRequirement now includes the filter directive.
(6) Added namespace translations to FelixResourceAdaptor.

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