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;
021
022import org.apache.hadoop.hbase.ByteBufferKeyValue;
023import org.apache.yetus.audience.InterfaceAudience;
024import org.apache.hadoop.hbase.util.ByteBufferUtils;
025
026/**
027 * ByteBuffer based cell which has the chunkid at the 0th offset
028 * @see MemStoreLAB
029 */
030//TODO : When moving this cell to CellChunkMap we will have the following things
031// to be serialized
032// chunkId (Integer) + offset (Integer) + length (Integer) + seqId (Long) = 20 bytes
033@InterfaceAudience.Private
034public class ByteBufferChunkKeyValue extends ByteBufferKeyValue {
035  public ByteBufferChunkKeyValue(ByteBuffer buf, int offset, int length) {
036    super(buf, offset, length);
037  }
038
039  public ByteBufferChunkKeyValue(ByteBuffer buf, int offset, int length, long seqId) {
040    super(buf, offset, length, seqId);
041  }
042
043  @Override
044  public int getChunkId() {
045    // The chunkId is embedded at the 0th offset of the bytebuffer
046    return ByteBufferUtils.toInt(buf, 0);
047  }
048}