1 /** 2 * Licensed to the Apache Software Foundation (ASF) under one 3 * or more contributor license agreements. See the NOTICE file 4 * distributed with this work for additional information 5 * regarding copyright ownership. The ASF licenses this file 6 * to you under the Apache License, Version 2.0 (the 7 * "License"); you may not use this file except in compliance 8 * with the License. You may obtain a copy of the License at 9 * 10 * http://www.apache.org/licenses/LICENSE-2.0 11 * 12 * Unless required by applicable law or agreed to in writing, software 13 * distributed under the License is distributed on an "AS IS" BASIS, 14 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 15 * See the License for the specific language governing permissions and 16 * limitations under the License. 17 */ 18 package org.apache.hadoop.hbase.regionserver.compactions; 19 20 import org.apache.hadoop.hbase.classification.InterfaceAudience; 21 22 /** 23 * Base class for compaction window implementation. 24 */ 25 @InterfaceAudience.Private 26 public abstract class CompactionWindow { 27 28 /** 29 * Compares the window to a timestamp. 30 * @param timestamp the timestamp to compare. 31 * @return a negative integer, zero, or a positive integer as the window lies before, covering, or 32 * after than the timestamp. 33 */ 34 public abstract int compareToTimestamp(long timestamp); 35 36 /** 37 * Move to the new window of the same tier or of the next tier, which represents an earlier time 38 * span. 39 * @return The next earlier window 40 */ 41 public abstract CompactionWindow nextEarlierWindow(); 42 43 /** 44 * Inclusive lower bound 45 */ 46 public abstract long startMillis(); 47 48 /** 49 * Exclusive upper bound 50 */ 51 public abstract long endMillis(); 52 53 @Override 54 public String toString() { 55 return "[" + startMillis() + ", " + endMillis() + ")"; 56 } 57 }