[ATLAS-2520] Use JanusGraph traversal over gremlin script

• Type: Improvement
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 1.0.0-alpha
• Fix Version/s: 1.2.0, 2.0.0
• Assignee: Apoorv Naik
• Reporter: Apoorv Naik
• Created: 27/Mar/18 21:49
• Updated: 26/Sep/19 00:38
• Resolved: 05/Nov/18 19:28

Description

Currently lot of code in Atlas follow a concept of GremlinQueryProvider which gives TP2 and TP3 queries depending on the graph backend being used. Since Atlas 1.0 is primarily going to rely on JanusGraph, it makes a more sense to remove TP2 related queries/abstractions and use the GraphTraversal Java API provided by JanusGraph.

 

PRO: Lot of unused code can be removed, more expressive Graph querying/traversal.

CONS: Decommissioning TP2 completely is a major engineering effort

Issue Links

• is depended upon by: ATLAS-2335 [DSL] Query with multiple aggregator of same type fails
• is depended upon by: ATLAS-2932 Update DSL to use Java Traversal API
• links to: https://reviews.apache.org/r/67943/