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 java.nio.ByteBuffer; 021import org.apache.hadoop.hbase.regionserver.ChunkCreator.ChunkType; 022import org.apache.yetus.audience.InterfaceAudience; 023 024/** 025 * An off heap chunk implementation. 026 */ 027@InterfaceAudience.Private 028public class OffheapChunk extends Chunk { 029 030 OffheapChunk(int size, int id, ChunkType chunkType) { 031 // better if this is always created fromPool. This should not be called 032 super(size, id, chunkType); 033 } 034 035 OffheapChunk(int size, int id, ChunkType chunkType, boolean fromPool) { 036 super(size, id, chunkType, fromPool); 037 assert fromPool == true; 038 } 039 040 @Override 041 void allocateDataBuffer() { 042 if (data == null) { 043 data = ByteBuffer.allocateDirect(this.size); 044 data.putInt(0, this.getId()); 045 } 046 } 047}