public void initSession(String username, String password, int cqlPort, String... nodes) {
if (session == null) {
log.debug("Initializing session for [username: " + username + ", cqlPort: " + cqlPort + ", nodes: " +
Arrays.toString(nodes) + "]");
cluster = new ClusterBuilder().addContactPoints(nodes).withCredentialsObfuscated(username, password)
.withPort(cqlPort).withCompression(ProtocolOptions.Compression.NONE).build();
session = cluster.connect("system");
}
}