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From "Robert Stupp (JIRA)" <j...@apache.org>
Subject [jira] [Created] (CASSANDRA-14737) Limit the dependencies used by UDFs/UDAs
Date Wed, 12 Sep 2018 14:34:00 GMT
Robert Stupp created CASSANDRA-14737:
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             Summary: Limit the dependencies used by UDFs/UDAs
                 Key: CASSANDRA-14737
                 URL: https://issues.apache.org/jira/browse/CASSANDRA-14737
             Project: Cassandra
          Issue Type: Improvement
          Components: CQL
            Reporter: Robert Stupp
            Assignee: Robert Stupp
             Fix For: 4.0


In an effort to clean up our hygiene and limit the dependencies used by UDFs/UDAs, I think
we should refactor the UDF code parts and remove the dependency to the Java Driver in that
area without breaking existing UDFs/UDAs.
  
The patch is in [this branch|https://github.com/snazy/cassandra/tree/feature/remove-udf-driver-dep-trunk].
The changes are rather trivial and provide 100% backwards compatibility for existing UDFs.
  
 The prototype copies the necessary parts from the Java Driver into the C* source tree to
{{org.apache.cassandra.cql3.functions.types}} and adopts its usages - i.e. UDF/UDA code plus
{{CQLSSTableWriter}} + {{StressCQLSSTableWriter}}. The latter two classes have a reference
to UDF's {{UDHelper}} and had to be changed as well.
  
 Some functionality, like type parsing & handling, is duplicated in the code base with
this prototype - once in the "current" source tree and once for UDFs. However, unifying the
code paths is not trivial, since the UDF sandbox prohibits the use of internal classes (direct
and likely indirect dependencies).
  
 /cc [~jbellis] 
  



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