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* Licensed to Elasticsearch under one or more contributor
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* this work for additional information regarding copyright
* ownership. Elasticsearch licenses this file to you under
* the Apache License, Version 2.0 (the "License"); you may
* not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing,
* software distributed under the License is distributed on an
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* KIND, either express or implied. See the License for the
* specific language governing permissions and limitations
* under the License.
*/
package org.elasticsearch.discovery;
import org.elasticsearch.common.transport.TransportAddress;
import java.util.List;
/**
* A pluggable provider of the list of seed hosts to use for discovery.
*/
public interface SeedHostsProvider {
/**
* Returns a list of seed hosts to use for discovery. Called repeatedly while discovery is active (i.e. while there is no master)
* so that this list may be dynamic.
*/
List getSeedAddresses(HostsResolver hostsResolver);
/**
* Helper object that allows to resolve a list of hosts to a list of transport addresses.
* Each host is resolved into a transport address
*/
interface HostsResolver {
List resolveHosts(List hosts);
}
}