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 }