See whatever preceded https://issues.apache.org/jira/browse/CASSANDRA-380 and
the current https://issues.apache.org/jira/browse/CASSANDRA-1016 for
potentially similar ideas, as well as
https://issues.apache.org/jira/browse/CASSANDRA-1215 and
https://issues.apache.org/jira/browse/CASSANDRA-1311 for
-1 vote for Tornado. As far as I know, it still doesn't run on Windows and
has had only 2 releases. I don't think it makes sense to push that as a
dependency to potential deployers of this UI.
There are many alternatives with broader platform support and more
consistent mainline releases: Bottle
