001/**
002 * Licensed to the Apache Software Foundation (ASF) under one
003 * or more contributor license agreements.  See the NOTICE file
004 * distributed with this work for additional information
005 * regarding copyright ownership.  The ASF licenses this file
006 * to you under the Apache License, Version 2.0 (the
007 * "License"); you may not use this file except in compliance
008 * with the License.  You may obtain a copy of the License at
009 *
010 *     http://www.apache.org/licenses/LICENSE-2.0
011 *
012 * Unless required by applicable law or agreed to in writing, software
013 * distributed under the License is distributed on an "AS IS" BASIS,
014 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
015 * See the License for the specific language governing permissions and
016 * limitations under the License.
017 */
018package org.apache.hadoop.hdfs.server.namenode.snapshot;
019
020import org.apache.hadoop.hdfs.protocol.SnapshotInfo;
021import org.apache.hadoop.hdfs.protocol.SnapshottableDirectoryStatus;
022
023/**
024 * This is an interface used to retrieve statistic information related to
025 * snapshots
026 */
027public interface SnapshotStatsMXBean {
028
029  /**
030   * Return the list of snapshottable directories
031   *
032   * @return the list of snapshottable directories
033   */
034  public SnapshottableDirectoryStatus.Bean[] getSnapshottableDirectories();
035
036  /**
037   * Return the list of snapshots
038   *
039   * @return the list of snapshots
040   */
041  public SnapshotInfo.Bean[] getSnapshots();
042
043}