Yes, the project is still active, but in a maintenance mode, because cassandra itself is moving in favor of CQL language and provide native JDBC driver already. This duplicates the idea of jassandra itself, to provide a JDBC like API.
And also, there are discussions to deprecate thrift API, which will effectively deprecate jassandra.
If your project is relatively new, suggest to have a look of Cassandra 8.0 and there cql and JDBC driver. That's the official future.:)
Regards,
Dop
https://issues.apache.org/jira/browse/CASSANDRA-2124
0.8 will be first version to have it included.
Thanks,
Dop