devapidocs/src-html/org/apache/hadoop/hbase/SizeCachedByteBufferKeyValue.html - hbase-site - Git at Google

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 <pre><span class="sourceLineNo">001</span>/*<a name="line.1"></a>
 <span class="sourceLineNo">002</span> * Licensed to the Apache Software Foundation (ASF) under one<a name="line.2"></a>
 <span class="sourceLineNo">003</span> * or more contributor license agreements.  See the NOTICE file<a name="line.3"></a>
 <span class="sourceLineNo">004</span> * distributed with this work for additional information<a name="line.4"></a>
 <span class="sourceLineNo">005</span> * regarding copyright ownership.  The ASF licenses this file<a name="line.5"></a>
 <span class="sourceLineNo">006</span> * to you under the Apache License, Version 2.0 (the<a name="line.6"></a>
 <span class="sourceLineNo">007</span> * "License"); you may not use this file except in compliance<a name="line.7"></a>
 <span class="sourceLineNo">008</span> * with the License.  You may obtain a copy of the License at<a name="line.8"></a>
 <span class="sourceLineNo">009</span> *<a name="line.9"></a>
 <span class="sourceLineNo">010</span> *     http://www.apache.org/licenses/LICENSE-2.0<a name="line.10"></a>
 <span class="sourceLineNo">011</span> *<a name="line.11"></a>
 <span class="sourceLineNo">012</span> * Unless required by applicable law or agreed to in writing, software<a name="line.12"></a>
 <span class="sourceLineNo">013</span> * distributed under the License is distributed on an "AS IS" BASIS,<a name="line.13"></a>
 <span class="sourceLineNo">014</span> * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.<a name="line.14"></a>
 <span class="sourceLineNo">015</span> * See the License for the specific language governing permissions and<a name="line.15"></a>
 <span class="sourceLineNo">016</span> * limitations under the License.<a name="line.16"></a>
 <span class="sourceLineNo">017</span> */<a name="line.17"></a>
 <span class="sourceLineNo">018</span>package org.apache.hadoop.hbase;<a name="line.18"></a>
 <span class="sourceLineNo">019</span><a name="line.19"></a>
 <span class="sourceLineNo">020</span>import java.nio.ByteBuffer;<a name="line.20"></a>
 <span class="sourceLineNo">021</span>import org.apache.hadoop.hbase.util.Bytes;<a name="line.21"></a>
 <span class="sourceLineNo">022</span>import org.apache.yetus.audience.InterfaceAudience;<a name="line.22"></a>
 <span class="sourceLineNo">023</span><a name="line.23"></a>
 <span class="sourceLineNo">024</span>/**<a name="line.24"></a>
 <span class="sourceLineNo">025</span> * This Cell is an implementation of {@link ByteBufferExtendedCell} where the data resides in off<a name="line.25"></a>
 <span class="sourceLineNo">026</span> * heap/ on heap ByteBuffer<a name="line.26"></a>
 <span class="sourceLineNo">027</span> */<a name="line.27"></a>
 <span class="sourceLineNo">028</span>@InterfaceAudience.Private<a name="line.28"></a>
 <span class="sourceLineNo">029</span>public class SizeCachedByteBufferKeyValue extends ByteBufferKeyValue {<a name="line.29"></a>
 <span class="sourceLineNo">030</span><a name="line.30"></a>
 <span class="sourceLineNo">031</span>  public static final int FIXED_OVERHEAD = Bytes.SIZEOF_SHORT + Bytes.SIZEOF_INT;<a name="line.31"></a>
 <span class="sourceLineNo">032</span>  private short rowLen;<a name="line.32"></a>
 <span class="sourceLineNo">033</span>  private int keyLen;<a name="line.33"></a>
 <span class="sourceLineNo">034</span><a name="line.34"></a>
 <span class="sourceLineNo">035</span>  public SizeCachedByteBufferKeyValue(ByteBuffer buf, int offset, int length, long seqId,<a name="line.35"></a>
 <span class="sourceLineNo">036</span>    int keyLen) {<a name="line.36"></a>
 <span class="sourceLineNo">037</span>    super(buf, offset, length);<a name="line.37"></a>
 <span class="sourceLineNo">038</span>    // We will read all these cached values at least once. Initialize now itself so that we can<a name="line.38"></a>
 <span class="sourceLineNo">039</span>    // avoid uninitialized checks with every time call<a name="line.39"></a>
 <span class="sourceLineNo">040</span>    this.rowLen = super.getRowLength();<a name="line.40"></a>
 <span class="sourceLineNo">041</span>    this.keyLen = keyLen;<a name="line.41"></a>
 <span class="sourceLineNo">042</span>    setSequenceId(seqId);<a name="line.42"></a>
 <span class="sourceLineNo">043</span>  }<a name="line.43"></a>
 <span class="sourceLineNo">044</span><a name="line.44"></a>
 <span class="sourceLineNo">045</span>  public SizeCachedByteBufferKeyValue(ByteBuffer buf, int offset, int length, long seqId,<a name="line.45"></a>
 <span class="sourceLineNo">046</span>    int keyLen, short rowLen) {<a name="line.46"></a>
 <span class="sourceLineNo">047</span>    super(buf, offset, length);<a name="line.47"></a>
 <span class="sourceLineNo">048</span>    // We will read all these cached values at least once. Initialize now itself so that we can<a name="line.48"></a>
 <span class="sourceLineNo">049</span>    // avoid uninitialized checks with every time call<a name="line.49"></a>
 <span class="sourceLineNo">050</span>    this.rowLen = rowLen;<a name="line.50"></a>
 <span class="sourceLineNo">051</span>    this.keyLen = keyLen;<a name="line.51"></a>
 <span class="sourceLineNo">052</span>    setSequenceId(seqId);<a name="line.52"></a>
 <span class="sourceLineNo">053</span>  }<a name="line.53"></a>
 <span class="sourceLineNo">054</span><a name="line.54"></a>
 <span class="sourceLineNo">055</span>  @Override<a name="line.55"></a>
 <span class="sourceLineNo">056</span>  public short getRowLength() {<a name="line.56"></a>
 <span class="sourceLineNo">057</span>    return rowLen;<a name="line.57"></a>
 <span class="sourceLineNo">058</span>  }<a name="line.58"></a>
 <span class="sourceLineNo">059</span><a name="line.59"></a>
 <span class="sourceLineNo">060</span>  @Override<a name="line.60"></a>
 <span class="sourceLineNo">061</span>  public int getKeyLength() {<a name="line.61"></a>
 <span class="sourceLineNo">062</span>    return this.keyLen;<a name="line.62"></a>
 <span class="sourceLineNo">063</span>  }<a name="line.63"></a>
 <span class="sourceLineNo">064</span><a name="line.64"></a>
 <span class="sourceLineNo">065</span>  @Override<a name="line.65"></a>
 <span class="sourceLineNo">066</span>  public long heapSize() {<a name="line.66"></a>
 <span class="sourceLineNo">067</span>    return super.heapSize() + FIXED_OVERHEAD;<a name="line.67"></a>
 <span class="sourceLineNo">068</span>  }<a name="line.68"></a>
 <span class="sourceLineNo">069</span><a name="line.69"></a>
 <span class="sourceLineNo">070</span>  /**<a name="line.70"></a>
 <span class="sourceLineNo">071</span>   * Override by just returning the length for saving cost of method dispatching. If not, it will<a name="line.71"></a>
 <span class="sourceLineNo">072</span>   * call {@link ExtendedCell#getSerializedSize()} firstly, then forward to<a name="line.72"></a>
 <span class="sourceLineNo">073</span>   * {@link SizeCachedKeyValue#getSerializedSize(boolean)}. (See HBASE-21657)<a name="line.73"></a>
 <span class="sourceLineNo">074</span>   */<a name="line.74"></a>
 <span class="sourceLineNo">075</span>  @Override<a name="line.75"></a>
 <span class="sourceLineNo">076</span>  public int getSerializedSize() {<a name="line.76"></a>
 <span class="sourceLineNo">077</span>    return this.length;<a name="line.77"></a>
 <span class="sourceLineNo">078</span>  }<a name="line.78"></a>
 <span class="sourceLineNo">079</span><a name="line.79"></a>
 <span class="sourceLineNo">080</span>  @Override<a name="line.80"></a>
 <span class="sourceLineNo">081</span>  public boolean equals(Object other) {<a name="line.81"></a>
 <span class="sourceLineNo">082</span>    return super.equals(other);<a name="line.82"></a>
 <span class="sourceLineNo">083</span>  }<a name="line.83"></a>
 <span class="sourceLineNo">084</span><a name="line.84"></a>
 <span class="sourceLineNo">085</span>  @Override<a name="line.85"></a>
 <span class="sourceLineNo">086</span>  public int hashCode() {<a name="line.86"></a>
 <span class="sourceLineNo">087</span>    return super.hashCode();<a name="line.87"></a>
 <span class="sourceLineNo">088</span>  }<a name="line.88"></a>
 <span class="sourceLineNo">089</span>}<a name="line.89"></a>


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	<pre><span class="sourceLineNo">001</span>/*<a name="line.1"></a>
	<span class="sourceLineNo">002</span> * Licensed to the Apache Software Foundation (ASF) under one<a name="line.2"></a>
	<span class="sourceLineNo">003</span> * or more contributor license agreements. See the NOTICE file<a name="line.3"></a>
	<span class="sourceLineNo">004</span> * distributed with this work for additional information<a name="line.4"></a>
	<span class="sourceLineNo">005</span> * regarding copyright ownership. The ASF licenses this file<a name="line.5"></a>
	<span class="sourceLineNo">006</span> * to you under the Apache License, Version 2.0 (the<a name="line.6"></a>
	<span class="sourceLineNo">007</span> * "License"); you may not use this file except in compliance<a name="line.7"></a>
	<span class="sourceLineNo">008</span> * with the License. You may obtain a copy of the License at<a name="line.8"></a>
	<span class="sourceLineNo">009</span> *<a name="line.9"></a>
	<span class="sourceLineNo">010</span> * http://www.apache.org/licenses/LICENSE-2.0<a name="line.10"></a>
	<span class="sourceLineNo">011</span> *<a name="line.11"></a>
	<span class="sourceLineNo">012</span> * Unless required by applicable law or agreed to in writing, software<a name="line.12"></a>
	<span class="sourceLineNo">013</span> * distributed under the License is distributed on an "AS IS" BASIS,<a name="line.13"></a>
	<span class="sourceLineNo">014</span> * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.<a name="line.14"></a>
	<span class="sourceLineNo">015</span> * See the License for the specific language governing permissions and<a name="line.15"></a>
	<span class="sourceLineNo">016</span> * limitations under the License.<a name="line.16"></a>
	<span class="sourceLineNo">017</span> */<a name="line.17"></a>
	<span class="sourceLineNo">018</span>package org.apache.hadoop.hbase;<a name="line.18"></a>
	<span class="sourceLineNo">019</span><a name="line.19"></a>
	<span class="sourceLineNo">020</span>import java.nio.ByteBuffer;<a name="line.20"></a>
	<span class="sourceLineNo">021</span>import org.apache.hadoop.hbase.util.Bytes;<a name="line.21"></a>
	<span class="sourceLineNo">022</span>import org.apache.yetus.audience.InterfaceAudience;<a name="line.22"></a>
	<span class="sourceLineNo">023</span><a name="line.23"></a>
	<span class="sourceLineNo">024</span>/**<a name="line.24"></a>
	<span class="sourceLineNo">025</span> * This Cell is an implementation of {@link ByteBufferExtendedCell} where the data resides in off<a name="line.25"></a>
	<span class="sourceLineNo">026</span> * heap/ on heap ByteBuffer<a name="line.26"></a>
	<span class="sourceLineNo">027</span> */<a name="line.27"></a>
	<span class="sourceLineNo">028</span>@InterfaceAudience.Private<a name="line.28"></a>
	<span class="sourceLineNo">029</span>public class SizeCachedByteBufferKeyValue extends ByteBufferKeyValue {<a name="line.29"></a>
	<span class="sourceLineNo">030</span><a name="line.30"></a>
	<span class="sourceLineNo">031</span> public static final int FIXED_OVERHEAD = Bytes.SIZEOF_SHORT + Bytes.SIZEOF_INT;<a name="line.31"></a>
	<span class="sourceLineNo">032</span> private short rowLen;<a name="line.32"></a>
	<span class="sourceLineNo">033</span> private int keyLen;<a name="line.33"></a>
	<span class="sourceLineNo">034</span><a name="line.34"></a>
	<span class="sourceLineNo">035</span> public SizeCachedByteBufferKeyValue(ByteBuffer buf, int offset, int length, long seqId,<a name="line.35"></a>
	<span class="sourceLineNo">036</span> int keyLen) {<a name="line.36"></a>
	<span class="sourceLineNo">037</span> super(buf, offset, length);<a name="line.37"></a>
	<span class="sourceLineNo">038</span> // We will read all these cached values at least once. Initialize now itself so that we can<a name="line.38"></a>
	<span class="sourceLineNo">039</span> // avoid uninitialized checks with every time call<a name="line.39"></a>
	<span class="sourceLineNo">040</span> this.rowLen = super.getRowLength();<a name="line.40"></a>
	<span class="sourceLineNo">041</span> this.keyLen = keyLen;<a name="line.41"></a>
	<span class="sourceLineNo">042</span> setSequenceId(seqId);<a name="line.42"></a>
	<span class="sourceLineNo">043</span> }<a name="line.43"></a>
	<span class="sourceLineNo">044</span><a name="line.44"></a>
	<span class="sourceLineNo">045</span> public SizeCachedByteBufferKeyValue(ByteBuffer buf, int offset, int length, long seqId,<a name="line.45"></a>
	<span class="sourceLineNo">046</span> int keyLen, short rowLen) {<a name="line.46"></a>
	<span class="sourceLineNo">047</span> super(buf, offset, length);<a name="line.47"></a>
	<span class="sourceLineNo">048</span> // We will read all these cached values at least once. Initialize now itself so that we can<a name="line.48"></a>
	<span class="sourceLineNo">049</span> // avoid uninitialized checks with every time call<a name="line.49"></a>
	<span class="sourceLineNo">050</span> this.rowLen = rowLen;<a name="line.50"></a>
	<span class="sourceLineNo">051</span> this.keyLen = keyLen;<a name="line.51"></a>
	<span class="sourceLineNo">052</span> setSequenceId(seqId);<a name="line.52"></a>
	<span class="sourceLineNo">053</span> }<a name="line.53"></a>
	<span class="sourceLineNo">054</span><a name="line.54"></a>
	<span class="sourceLineNo">055</span> @Override<a name="line.55"></a>
	<span class="sourceLineNo">056</span> public short getRowLength() {<a name="line.56"></a>
	<span class="sourceLineNo">057</span> return rowLen;<a name="line.57"></a>
	<span class="sourceLineNo">058</span> }<a name="line.58"></a>
	<span class="sourceLineNo">059</span><a name="line.59"></a>
	<span class="sourceLineNo">060</span> @Override<a name="line.60"></a>
	<span class="sourceLineNo">061</span> public int getKeyLength() {<a name="line.61"></a>
	<span class="sourceLineNo">062</span> return this.keyLen;<a name="line.62"></a>
	<span class="sourceLineNo">063</span> }<a name="line.63"></a>
	<span class="sourceLineNo">064</span><a name="line.64"></a>
	<span class="sourceLineNo">065</span> @Override<a name="line.65"></a>
	<span class="sourceLineNo">066</span> public long heapSize() {<a name="line.66"></a>
	<span class="sourceLineNo">067</span> return super.heapSize() + FIXED_OVERHEAD;<a name="line.67"></a>
	<span class="sourceLineNo">068</span> }<a name="line.68"></a>
	<span class="sourceLineNo">069</span><a name="line.69"></a>
	<span class="sourceLineNo">070</span> /**<a name="line.70"></a>
	<span class="sourceLineNo">071</span> * Override by just returning the length for saving cost of method dispatching. If not, it will<a name="line.71"></a>
	<span class="sourceLineNo">072</span> * call {@link ExtendedCell#getSerializedSize()} firstly, then forward to<a name="line.72"></a>
	<span class="sourceLineNo">073</span> * {@link SizeCachedKeyValue#getSerializedSize(boolean)}. (See HBASE-21657)<a name="line.73"></a>
	<span class="sourceLineNo">074</span> */<a name="line.74"></a>
	<span class="sourceLineNo">075</span> @Override<a name="line.75"></a>
	<span class="sourceLineNo">076</span> public int getSerializedSize() {<a name="line.76"></a>
	<span class="sourceLineNo">077</span> return this.length;<a name="line.77"></a>
	<span class="sourceLineNo">078</span> }<a name="line.78"></a>
	<span class="sourceLineNo">079</span><a name="line.79"></a>
	<span class="sourceLineNo">080</span> @Override<a name="line.80"></a>
	<span class="sourceLineNo">081</span> public boolean equals(Object other) {<a name="line.81"></a>
	<span class="sourceLineNo">082</span> return super.equals(other);<a name="line.82"></a>
	<span class="sourceLineNo">083</span> }<a name="line.83"></a>
	<span class="sourceLineNo">084</span><a name="line.84"></a>
	<span class="sourceLineNo">085</span> @Override<a name="line.85"></a>
	<span class="sourceLineNo">086</span> public int hashCode() {<a name="line.86"></a>
	<span class="sourceLineNo">087</span> return super.hashCode();<a name="line.87"></a>
	<span class="sourceLineNo">088</span> }<a name="line.88"></a>
	<span class="sourceLineNo">089</span>}<a name="line.89"></a>




























































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