Inessa Vasilevskaya 8e4b2dad0b Artifact Plugins Loader ...

Adds a Stevedore-based plugin loader which is capable to load custom
Artifact Types implemented as classes or lists of classes.

The Loader validates if entry-points' names match the type names of the
ArtifactTypes, ensures that no version conflicts occur (i.e. there are
no Artifact Types which have identical combination of Type Name and Type
Version), maintains the mapping of Type Names to the actual classes and
also keeps an index of Artifact Types by their endpoint aliases.

Modifies the Serialization utility of Declarative framework to use the
actual set of plugins instead of synthetic type dictionary.

Adds several example plugins to glance/contrib directory.

Implements-blueprint: artifact-repository

Co-Authored-By: Inessa Vasilevskaya <ivasilevskaya@mirantis.com>
Co-Authored-By: Alexander Tivelkov <ativelkov@mirantis.com>

Change-Id: I5ff5d4c257a1c42885068f4343f52e55189265a5

2015-03-30 20:51:10 +03:00

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