public interface AddressTranslator
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 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 "translated", only IP address retrieved from or sent
by Cassandra nodes to the driver are.Modifier and Type | Method and Description |
---|---|
void |
close()
Called at
Cluster shutdown. |
void |
init(Cluster cluster)
Initializes this address translator.
|
InetSocketAddress |
translate(InetSocketAddress address)
Translates a Cassandra
rpc_address to another address if necessary. |
void init(Cluster cluster)
cluster
- the Cluster
instance for which the translator is created.InetSocketAddress translate(InetSocketAddress address)
rpc_address
to another address if necessary.address
- the address of a node as returned by Cassandra. Note that
if the rpc_address
of a node has been configured to 0.0.0.0
server side, then the provided address will be the node listen_address
,
*not* 0.0.0.0
. Also note that the port for InetSocketAddress
will always be the one set at Cluster construction time (9042 by default).address
. If the return is null
, then address
will be used by the driver (it is thus equivalent to returning
address
directly)void close()
Cluster
shutdown.Copyright © 2012–2017. All rights reserved.