hazelcast-master/hazelcast/src/main/java/com/hazelcast/internal/nearcache/impl/invalidation/MinimalPartitionService.java
/*
 * Copyright (c) 2008-2023, 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.internal.nearcache.impl.invalidation;

import com.hazelcast.internal.serialization.Data;

/**
 * Abstraction over member and client partition services to provide commonly useful methods.
 */
public interface MinimalPartitionService {
    /**
     * Returns the partition ID for a Data key.
     *
     * @param key the Data key
     * @return the partition ID
     * @throws NullPointerException if key is {@code null}
     */
    int getPartitionId(Data key);

    /**
     * Returns the partition ID for a given object.
     *
     * @param key the object key
     * @return the partition ID
     */
    int getPartitionId(Object key);

    /**
     * Returns the number of partitions.
     *
     * @return the number of partitions
     */
    int getPartitionCount();
}
