/**
* Licensed to Cloudera, Inc. under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. Cloudera, Inc. licenses this file
* to you 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.cloudera.util.consistenthash;
import java.util.List;
/**
* Interface for callbacks that note when keys have been moved to different
* nodes in the consistent hash. This allows for incremental changes (not
* necessarily just for consistent hash bin cardinality changes)
*/
public interface MoveHandler<K, V> {
public void moved(K from, K to, List<V> values);
public void rebuild(K key, List<V> allVals);
}