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// Copyright 2020 Oath Inc. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
package com.yahoo.config.provision.zone;
import com.yahoo.config.provision.CloudName;
/**
* A ZoneId list which can be filtered in various ways; elements can be accessed after at least one filter.
*
* The methods here return instances of {@link ZoneList}, which extends ZoneFilter, but with accessors and additional filters.
* This forces the developer to consider which of the filters in this class to apply, prior to accessing any zones.
*
* @author jonmv
*/
public interface ZoneFilter {
/** Negates the next filter. */
ZoneFilter not();
/** Zones which are upgraded by the controller. */
ZoneList controllerUpgraded();
/** Zones which support direct routing through exclusive load balancers. */
ZoneList directlyRouted();
/** Zones where traffic is routed using given method */
ZoneList routingMethod(RoutingMethod method);
/** Zones where config servers are up and running. */
ZoneList reachable();
/** All zones from the initial pool. */
ZoneList all();
/** Zones in the specified cloud */
default ZoneList ofCloud(CloudName cloud) {
return all(); // Not implemented in this repo.
}
}
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