/*
* Copyright (c) 2008-2017, Hazelcast, Inc. All Rights Reserved.
*
* 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 com.hazelcast.quorum;
import com.hazelcast.core.Member;
import java.util.Collection;
/**
* A function that can be used for conclude absence/presence of quorum.
* This function is triggered when any change happens to member list.
*/
public interface QuorumFunction {
/**
* Determines if quorum is present based on the member-list.
*
* @param members snapshot of current member list
* @return boolean presence/absence of quorum
*/
boolean apply(Collection<Member> members);
}