public interface AddressTranslater
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 prefered address to use
to reach the node (for instance, the
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
Cluster instance are not "tanslated", only IP address retrieve from or sent
by Cassandra nodes to the driver are.
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 returing
Copyright © 2012–2015. All rights reserved.