public interface AddressTranslator
The driver auto-detect new Cassandra nodes added to the cluster through server side pushed
notifications and through checking the system tables. For each node, the address the driver will
receive will correspond to the address set as
rpc_address in the node yaml file. In most
case, this is the correct address to use by the driver and that is what is used by default.
However, sometimes the addresses received through this mechanism will either not be reachable
directly by the driver or should not be the preferred address to use to reach the node (for
rpc_address set on Cassandra nodes might be a private IP, but some clients
may have to use a public IP, or pass by a router to reach that node). This interface allows to
deal with such cases, by allowing to translate an address as sent by a Cassandra node to another
address to be used by the driver for connection.
Please note that the contact points addresses provided while creating the
instance are not "translated", only IP address retrieved from or sent by Cassandra nodes to the
|Modifier and Type||Method and Description|
Initializes this address translator.
Translates a Cassandra
void init(Cluster cluster)
Clusterinstance for which the translator is created.
InetSocketAddress translate(InetSocketAddress address)
rpc_addressto another address if necessary.
address- the address of a node as returned by Cassandra. Note that if the
rpc_addressof a node has been configured to
0.0.0.0server side, then the provided address will be the node
0.0.0.0. Also note that the port for
InetSocketAddresswill always be the one set at Cluster construction time (9042 by default).
address. If the return is
addresswill be used by the driver (it is thus equivalent to returning
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