com.hazelcast.core.PartitioningStrategy Maven / Gradle / Ivy
/*
* Copyright (c) 2008-2013, 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.core;
/**
* PartitioningStrategy allows keys to be located on the same member
* This makes related data to be stored in the same location. (See data-affinity.)
*
* @param key type
*/
public interface PartitioningStrategy {
/**
* Returns the key object that will be used by Hazelcast to specify the partition.
*
* @param key actual key object
* @return partition key object or null to fallback to default partition calculation
*/
Object getPartitionKey(K key);
}