public class WhiteListPolicy extends HostFilterPolicy
This policy wraps another load balancing policy and will delegate the choice
of hosts to the wrapped policy with the exception that only hosts contained
in the white list provided when constructing this policy will ever be
returned. Any host not in the while list will be considered
and thus will not be connected to.
This policy can be useful to ensure that the driver only connects to a predefined set of hosts. Keep in mind however that this policy defeats somewhat the host auto-detection of the driver. As such, this policy is only useful in a few special cases or for testing, but is not optimal in general. If all you want to do is limiting connections to hosts of the local data-center then you should use DCAwareRoundRobinPolicy and *not* this policy in particular.
|Constructor and Description|
Creates a new policy that wraps the provided child policy but only "allows" hosts from the provided while list.
close, distance, fromDCBlackList, fromDCWhiteList, getChildPolicy, init, newQueryPlan, onAdd, onDown, onRemove, onSuspected, onUp
public WhiteListPolicy(LoadBalancingPolicy childPolicy, Collection<InetSocketAddress> whiteList)
childPolicy- the wrapped policy.
whiteList- the white listed hosts. Only hosts from this list may get connected to (whether they will get connected to or not depends on the child policy).
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