QuorumService.java

/*
 * 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;

/**
 * Quorum service can be used to trigger cluster quorums at any time.
 * Normally quorums are done when any change happens on the member list.
 */
public interface QuorumService {

    /**
     * Returns the {@link Quorum} instance for a given quorum name.
     *
     * @param quorumName name of the quorum
     * @return {@link Quorum}
     * @throws IllegalArgumentException if no quorum found for given name
     * @throws NullPointerException     if quorumName is null
     */
    Quorum getQuorum(String quorumName) throws IllegalArgumentException;
}