| /** |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you under the Apache License, Version 2.0 (the |
| * "License"); you may not use this file except in compliance |
| * with the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| package org.apache.hadoop.hbase; |
| |
| import java.nio.ByteBuffer; |
| |
| import org.apache.hadoop.hbase.util.Bytes; |
| import org.apache.yetus.audience.InterfaceAudience; |
| |
| /** |
| * This Cell is an implementation of {@link ByteBufferExtendedCell} where the data resides in |
| * off heap/ on heap ByteBuffer |
| */ |
| @InterfaceAudience.Private |
| public class SizeCachedByteBufferKeyValue extends ByteBufferKeyValue { |
| |
| public static final int FIXED_OVERHEAD = Bytes.SIZEOF_SHORT + Bytes.SIZEOF_INT; |
| private short rowLen; |
| private int keyLen; |
| |
| public SizeCachedByteBufferKeyValue(ByteBuffer buf, int offset, int length, long seqId, |
| int keyLen) { |
| super(buf, offset, length); |
| // We will read all these cached values at least once. Initialize now itself so that we can |
| // avoid uninitialized checks with every time call |
| this.rowLen = super.getRowLength(); |
| this.keyLen = keyLen; |
| setSequenceId(seqId); |
| } |
| |
| public SizeCachedByteBufferKeyValue(ByteBuffer buf, int offset, int length, long seqId, |
| int keyLen, short rowLen) { |
| super(buf, offset, length); |
| // We will read all these cached values at least once. Initialize now itself so that we can |
| // avoid uninitialized checks with every time call |
| this.rowLen = rowLen; |
| this.keyLen = keyLen; |
| setSequenceId(seqId); |
| } |
| |
| @Override |
| public short getRowLength() { |
| return rowLen; |
| } |
| |
| @Override |
| public int getKeyLength() { |
| return this.keyLen; |
| } |
| |
| @Override |
| public long heapSize() { |
| return super.heapSize() + FIXED_OVERHEAD; |
| } |
| |
| /** |
| * Override by just returning the length for saving cost of method dispatching. If not, it will |
| * call {@link ExtendedCell#getSerializedSize()} firstly, then forward to |
| * {@link SizeCachedKeyValue#getSerializedSize(boolean)}. (See HBASE-21657) |
| */ |
| @Override |
| public int getSerializedSize() { |
| return this.length; |
| } |
| |
| @Override |
| public boolean equals(Object other) { |
| return super.equals(other); |
| } |
| |
| @Override |
| public int hashCode() { |
| return super.hashCode(); |
| } |
| } |