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https://issues.apache.org/jira/browse/ATLAS-2251?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16252738#comment-16252738
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Nigel Jones commented on ATLAS-2251:
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The patch may need rebasing - that error I posted now seems fixed. Getting a
Hive Hook IT error now but I think that is a seperate issue so once rebased I
think patch is good....
> Remove/replace use of TypeSystem with AtlasTypeRegistry
> -------------------------------------------------------
>
> Key: ATLAS-2251
> URL: https://issues.apache.org/jira/browse/ATLAS-2251
> Project: Atlas
> Issue Type: Task
> Components: atlas-core
> Affects Versions: 1.0.0
> Reporter: Madhan Neethiraj
> Assignee: Madhan Neethiraj
> Priority: Critical
> Fix For: 1.0.0
>
> Attachments: ATLAS-2251-1.patch, ATLAS-2251-3.patch,
> ATLAS-2251-4.patch
>
>
> With introduction of V2 APIs in 0.8 release, Atlas core type-system
> implementation moved to use AtlasTypeRegistry (which uses data-structures
> introduced in V2 APIs). However, earlier version equivalent, TypeSystem
> (which uses V1 data-structures), is still being referenced in few places,
> like:
> - V1 REST APIs, to covert between V1 and V2 data-structures
> - notification processing, which uses V1 data-structures
> - DSL query implementation
> - AtlasClient API
> - unit tests
> Having to support legacy TypeSystem causes run time overhead in duplicate
> caching of type-information - in AtlasTypeRegistry and TypeSystem. Removing
> TypeSystem implementation will help eliminate this overhead and also improve
> maintainability of Atlas sources.
> This JIRA is to track removal of TypeSystem implementation and its
> references; where necessary, references should be updated to use
> AtlasTypeRegistry equivalent.
> - it is very critical to continue to support V1 REST APIs and processing of
> current V1 notifications
> - existing unit tests that use V1 data-structures will be removed and will be
> replaced with equivalents that use V2 data-structures
> - AtlasClient in new release will only support V2 data-structures; however,
> older version AtlasClient will continue to work with new version of Atlas
> server
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