[jira] [Created] (CASSANDRA-14938) Use a stub IndexRegistry when initialised in non-daemon mode

["Sam Tunnicliffe (JIRA)" <ji...@apache.org>]

Sam Tunnicliffe created CASSANDRA-14938:
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             Summary: Use a stub IndexRegistry when initialised in non-daemon mode
                 Key: CASSANDRA-14938
                 URL: https://issues.apache.org/jira/browse/CASSANDRA-14938
             Project: Cassandra
          Issue Type: Improvement
          Components: CQL, Testing
            Reporter: Sam Tunnicliffe
            Assignee: Sam Tunnicliffe
             Fix For: 4.0


Offline processing of FQL logs for workload analysis or replay testing would benefit from being able to use C* as a library for parsing and preparation of the recorded CQL queries. One thing which makes this difficult is that preparing CQL statements involves validating any index restrictions via the {{IndexRegistry}} which means instantiating a {{ColumnFamilyStore}}, which has several side effects that are troublesome in an offline environment.  

In the FQL processing use case this validation is unnecessary and I imagine this is true for most, if not all, offline tools. In these cases, we could use a stub {{IndexRegistry}} which enables validation to succeed, but which doesn't provide any real functionality. 



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