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}