Madhan Neethiraj created RANGER-4787:
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Summary: reduce plugin memory footprint by avoiding creation of
unnecessary collections
Key: RANGER-4787
URL: https://issues.apache.org/jira/browse/RANGER-4787
Project: Ranger
Issue Type: Improvement
Components: plugins
Reporter: Madhan Neethiraj
Assignee: Madhan Neethiraj
Model package classes like RangerPolicy initialize collection members with a
new collection object (ArrayList/HashMap/HashSet). Many of these members would
likely remain empty, resulting in the initialization to be unnecessary. Instead
of creating a new collection object, it will help to initialize with
Collections.emptyList()/emptySet()/emptyMap() - to save memory while retaining
non-null value for collection members.
Also, set() on these members currently create a new collection object with a
copy of the value to be set. This can be avoided by using the given value.
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