hadoop-hdds/common/src/main/java/org/apache/hadoop/hdds/utils/MetaStoreIterator.java

/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF 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 org.apache.hadoop.hdds.utils;

import java.util.Iterator;

/**
 * Iterator for MetaDataStore DB.
 * @param <T>
 */
public interface MetaStoreIterator<T> extends Iterator<T> {

  /**
   * seek to first entry.
   */
  void seekToFirst();

  /**
   * seek to last entry.
   */
  void seekToLast();

}