MLH-73 | Cassandra optimisation. Optimise edgeLabel fetching only to root level vertices

[aarshi0301]

Change description

Description here

• contains
• hotfix for edge retrieval via projected atributes
• cassandra optimisation in policies
• casandra optimisation in relationshipAttributes
• skip edge labels retrieval for 2nd level vertices
• Atlan PR : https://github.com/atlanhq/atlan/pull/6576
• JIRA:

1. https://atlanhq.atlassian.net/browse/MLH-190
2. https://atlanhq.atlassian.net/browse/MLH-199

Type of change

• Bug fix (fixes an issue)
• New feature (adds functionality)

Related issues

Fix #1

Checklists

Development

• Lint rules pass locally
• Application changes have been tested thoroughly
• Automated tests covering modified code pass

Security

• Security impact of change has been considered
• Code follows company security practices and guidelines

Code review

• Pull request has a descriptive title and context useful to a reviewer. Screenshots or screencasts are attached as necessary
• "Ready for review" label attached and reviewers assigned
• Changes have been reviewed by at least one other contributor
• Pull request linked to task tracker where applicable

PR Overview

This pull request addresses a bug fix and performance optimisation in Cassandra policies and relationships retrieval by introducing Janus graph optimisations for relationships and adding a fallback mechanism for prefetch failures.

• Introduces a new configuration flag (ATLAS_INDEXSEARCH_ENABLE_JANUS_OPTIMISATION_FOR_RELATIONS) and related conditional logic for optimised property prefetching in EntityGraphRetriever.
• Implements a try-catch fallback for prefetch failures when dealing with policy attributes.
• Removes an obsolete edge retrieval method in GraphHelper and tweaks filtering of edge labels.

Reviewed Changes

File	Description
repository/src/main/java/org/apache/atlas/repository/store/graph/v2/EntityGraphRetriever.java	Implements Janus optimisation for relationship attributes and a fallback for prefetch errors in policies.
repository/src/main/java/org/apache/atlas/repository/graph/GraphHelper.java	Removes the getOnlyActiveEdges method and adjusts label filtering in edge retrieval.
.github/workflows/maven.yml	Adds a new branch trigger for cassandrapoliciesoptimisation.
intg/src/main/java/org/apache/atlas/AtlasConfiguration.java	Adds a new configuration flag to control Janus optimisation for relationships.

Copilot reviewed 4 out of 4 changed files in this pull request and generated 1 comment.

Comments suppressed due to low confidence (1)

repository/src/main/java/org/apache/atlas/repository/graph/GraphHelper.java:2088

• [nitpick] The filtering logic for edge labels was changed by removing the check on entry value emptiness; confirm that allowing empty type names is intentional and does not introduce unintended behavior during edge label processing.

.filter(entry -> !entry.getKey().isEmpty())