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/*
* Copyright 2014-present Open Networking Foundation
* Copyright © 2020 camunda services GmbH ([email protected])
*
* Licensed 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 "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package io.atomix.cluster;
import io.atomix.utils.event.ListenerService;
import io.atomix.utils.net.Address;
import java.util.Set;
/** Service for obtaining information about the individual members within the cluster. */
public interface ClusterMembershipService
extends ListenerService {
/**
* Returns the local member.
*
* @return local member
*/
Member getLocalMember();
/**
* Returns the set of current cluster members.
*
* @return set of cluster members
*/
Set getMembers();
/**
* Returns the specified member.
*
* @param memberId the member identifier
* @return the member or {@code null} if no node with the given identifier exists
*/
Member getMember(MemberId memberId);
/**
* Returns a member by address.
*
* @param address the member address
* @return the member or {@code null} if no member with the given address could be found
*/
default Member getMember(final Address address) {
return getMembers().stream()
.filter(member -> member.address().equals(address))
.findFirst()
.orElse(null);
}
}