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From "Madhan Neethiraj (JIRA)" <>
Subject [jira] [Created] (ATLAS-2251) Remove/replace use of TypeSystem with AtlasTypeRegistry
Date Fri, 03 Nov 2017 17:36:00 GMT
Madhan Neethiraj created ATLAS-2251:

             Summary: Remove/replace use of TypeSystem with AtlasTypeRegistry
                 Key: ATLAS-2251
             Project: Atlas
          Issue Type: Task
          Components:  atlas-core
    Affects Versions: 1.0.0
            Reporter: Madhan Neethiraj
            Assignee: Madhan Neethiraj
            Priority: Critical

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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