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.hbase.regionserver; 019 020import org.apache.hadoop.hbase.util.ClassSize; 021import org.apache.yetus.audience.InterfaceAudience; 022 023/** 024 * CSLMImmutableSegment is an abstract class that extends the API supported by a {@link Segment}, 025 * and {@link ImmutableSegment}. This immutable segment is working with CellSet with 026 * ConcurrentSkipListMap (CSLM) delegatee. 027 */ 028@InterfaceAudience.Private 029public class CSLMImmutableSegment extends ImmutableSegment { 030 public static final long DEEP_OVERHEAD_CSLM = 031 ImmutableSegment.DEEP_OVERHEAD + ClassSize.CONCURRENT_SKIPLISTMAP; 032 033 /** 034 * ------------------------------------------------------------------------ Copy C-tor to be used 035 * when new CSLMImmutableSegment is being built from a Mutable one. This C-tor should be used when 036 * active MutableSegment is pushed into the compaction pipeline and becomes an ImmutableSegment. 037 */ 038 protected CSLMImmutableSegment(Segment segment, MemStoreSizing memstoreSizing) { 039 super(segment); 040 // update the segment metadata heap size 041 long indexOverhead = -MutableSegment.DEEP_OVERHEAD + DEEP_OVERHEAD_CSLM; 042 incMemStoreSize(0, indexOverhead, 0, 0); // CSLM is always on-heap 043 if (memstoreSizing != null) { 044 memstoreSizing.incMemStoreSize(0, indexOverhead, 0, 0); 045 } 046 } 047 048 @Override 049 protected long indexEntrySize() { 050 return ClassSize.CONCURRENT_SKIPLISTMAP_ENTRY; 051 } 052 053 @Override 054 protected boolean canBeFlattened() { 055 return true; 056 } 057}