src/main/java/com/github/ddth/cql/SessionManager.java
public Cluster getCluster(String hostsAndPorts, String username, String password) {
        return getCluster(ClusterIdentifier.getInstance(hostsAndPorts, username, password));
    }
public Cluster getCluster(String hostsAndPorts, String username, String password) {
        return getCluster(ClusterIdentifier.getInstance(hostsAndPorts, username, password));
    }
Obtain a Cassandra cluster instance.

@param hostsAndPorts
format: "host1:port1,host2,host3:port3". If no port is
specified, the {@link CqlUtils#DEFAULT_CASSANDRA_PORT} is used.
@param username
@param password
@return