001/*
002 *
003 * Licensed to the Apache Software Foundation (ASF) under one
004 * or more contributor license agreements.  See the NOTICE file
005 * distributed with this work for additional information
006 * regarding copyright ownership.  The ASF licenses this file
007 * to you under the Apache License, Version 2.0 (the
008 * "License"); you may not use this file except in compliance
009 * with the License.  You may obtain a copy of the License at
010 *
011 *     http://www.apache.org/licenses/LICENSE-2.0
012 *
013 * Unless required by applicable law or agreed to in writing, software
014 * distributed under the License is distributed on an "AS IS" BASIS,
015 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
016 * See the License for the specific language governing permissions and
017 * limitations under the License.
018 */
019package org.apache.hadoop.hbase.util;
020
021import org.apache.yetus.audience.InterfaceAudience;
022
023/**
024 * Similar interface as {@link org.apache.hadoop.util.Progressable} but returns
025 * a boolean to support canceling the operation.
026 * <p/>
027 * Used for doing updating of OPENING znode during log replay on region open.
028 */
029@InterfaceAudience.Private
030public interface CancelableProgressable {
031
032  /**
033   * Report progress.  Returns true if operations should continue, false if the
034   * operation should be canceled and rolled back.
035   * @return whether to continue (true) or cancel (false) the operation
036   */
037  boolean progress();
038
039}