org.springframework.data.cassandra.core.cql

Interface HostMapper<T>

All Known Implementing Classes:

RingMemberHostMapper

Functional Interface:

This is a functional interface and can therefore be used as the assignment target for a lambda expression or method reference.

@FunctionalInterface
public interface HostMapper<T>

An interface used by CqlTemplate for mapping Hosts of a Metadata on a per-item basis.. Implementations of this interface perform the actual work of mapping each host to a result object, but don't need to worry about exception handling. DriverException will be caught and handled by the calling CqlTemplate.

Author:

Matthew T. Adams, Mark Paluch

See Also:

CqlTemplate

Method Summary

Modifier and Type	Method and Description
Collection<T>	mapHosts(Iterable<com.datastax.driver.core.Host> hosts) Implementations must implement this method to map each Host in the Metadata.

Method Detail

mapHosts

Collection<T> mapHosts(Iterable<com.datastax.driver.core.Host> hosts)
                throws com.datastax.driver.core.exceptions.DriverException

Implementations must implement this method to map each Host in the Metadata.

Parameters:

hosts - the Iterable of Hosts to map, must not be null.

Returns:

the result objects for the given hosts.

Throws:

com.datastax.driver.core.exceptions.DriverException - if a DriverException is encountered mapping values (that is, there's no need to catch DriverException).