AddressTranslator implementation for multi-region EC2 deployments where clients are also deployed in EC2.
Its distinctive feature is that it translates addresses according to the location of the Cassandra host:
This optimizes network costs, because Amazon charges more for communication over public IPs.
Log method called to log errors that occurred while performing dns resolution. You can assign your own method to the class instance to do proper logging.
Addresses in the same EC2 region are translated to private IPs and addresses in different EC2 regions (than the client) are unchanged