1 /*
2 * Copyright 2010 The Apache Software Foundation
3 *
4 * Licensed to the Apache Software Foundation (ASF) under one
5 * or more contributor license agreements. See the NOTICE file
6 * distributed with this work for additional information
7 * regarding copyright ownership. The ASF licenses this file
8 * to you under the Apache License, Version 2.0 (the
9 * "License"); you may not use this file except in compliance
10 * with the License. You may obtain a copy of the License at
11 *
12 * http://www.apache.org/licenses/LICENSE-2.0
13 *
14 * Unless required by applicable law or agreed to in writing, software
15 * distributed under the License is distributed on an "AS IS" BASIS,
16 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
17 * See the License for the specific language governing permissions and
18 * limitations under the License.
19 */
20 package org.apache.hadoop.hbase.util;
21
22 /**
23 * Similar interface as {@link org.apache.hadoop.util.Progressable} but returns
24 * a boolean to support canceling the operation.
25 * <p>
26 * Used for doing updating of OPENING znode during log replay on region open.
27 */
28 public interface CancelableProgressable {
29
30 /**
31 * Report progress. Returns true if operations should continue, false if the
32 * operation should be canceled and rolled back.
33 * @return whether to continue (true) or cancel (false) the operation
34 */
35 public boolean progress();
36
37 }