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| <pre><span class="source-line-no">001</span><span id="line-1">/*</span> |
| <span class="source-line-no">002</span><span id="line-2"> * Licensed to the Apache Software Foundation (ASF) under one</span> |
| <span class="source-line-no">003</span><span id="line-3"> * or more contributor license agreements. See the NOTICE file</span> |
| <span class="source-line-no">004</span><span id="line-4"> * distributed with this work for additional information</span> |
| <span class="source-line-no">005</span><span id="line-5"> * regarding copyright ownership. The ASF licenses this file</span> |
| <span class="source-line-no">006</span><span id="line-6"> * to you under the Apache License, Version 2.0 (the</span> |
| <span class="source-line-no">007</span><span id="line-7"> * "License"); you may not use this file except in compliance</span> |
| <span class="source-line-no">008</span><span id="line-8"> * with the License. You may obtain a copy of the License at</span> |
| <span class="source-line-no">009</span><span id="line-9"> *</span> |
| <span class="source-line-no">010</span><span id="line-10"> * http://www.apache.org/licenses/LICENSE-2.0</span> |
| <span class="source-line-no">011</span><span id="line-11"> *</span> |
| <span class="source-line-no">012</span><span id="line-12"> * Unless required by applicable law or agreed to in writing, software</span> |
| <span class="source-line-no">013</span><span id="line-13"> * distributed under the License is distributed on an "AS IS" BASIS,</span> |
| <span class="source-line-no">014</span><span id="line-14"> * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.</span> |
| <span class="source-line-no">015</span><span id="line-15"> * See the License for the specific language governing permissions and</span> |
| <span class="source-line-no">016</span><span id="line-16"> * limitations under the License.</span> |
| <span class="source-line-no">017</span><span id="line-17"> */</span> |
| <span class="source-line-no">018</span><span id="line-18">package org.apache.hadoop.hbase.io.hfile;</span> |
| <span class="source-line-no">019</span><span id="line-19"></span> |
| <span class="source-line-no">020</span><span id="line-20">import java.io.DataOutputStream;</span> |
| <span class="source-line-no">021</span><span id="line-21">import java.io.IOException;</span> |
| <span class="source-line-no">022</span><span id="line-22">import org.apache.hadoop.conf.Configuration;</span> |
| <span class="source-line-no">023</span><span id="line-23">import org.apache.hadoop.hbase.ExtendedCell;</span> |
| <span class="source-line-no">024</span><span id="line-24">import org.apache.hadoop.hbase.io.encoding.DataBlockEncoding;</span> |
| <span class="source-line-no">025</span><span id="line-25">import org.apache.hadoop.hbase.io.encoding.EncodingState;</span> |
| <span class="source-line-no">026</span><span id="line-26">import org.apache.hadoop.hbase.io.encoding.HFileBlockDecodingContext;</span> |
| <span class="source-line-no">027</span><span id="line-27">import org.apache.hadoop.hbase.io.encoding.HFileBlockDefaultDecodingContext;</span> |
| <span class="source-line-no">028</span><span id="line-28">import org.apache.hadoop.hbase.io.encoding.HFileBlockDefaultEncodingContext;</span> |
| <span class="source-line-no">029</span><span id="line-29">import org.apache.hadoop.hbase.io.encoding.HFileBlockEncodingContext;</span> |
| <span class="source-line-no">030</span><span id="line-30">import org.apache.hadoop.hbase.io.encoding.NoneEncoder;</span> |
| <span class="source-line-no">031</span><span id="line-31">import org.apache.yetus.audience.InterfaceAudience;</span> |
| <span class="source-line-no">032</span><span id="line-32"></span> |
| <span class="source-line-no">033</span><span id="line-33">/**</span> |
| <span class="source-line-no">034</span><span id="line-34"> * Does not perform any kind of encoding/decoding.</span> |
| <span class="source-line-no">035</span><span id="line-35"> */</span> |
| <span class="source-line-no">036</span><span id="line-36">@InterfaceAudience.Private</span> |
| <span class="source-line-no">037</span><span id="line-37">public class NoOpDataBlockEncoder implements HFileDataBlockEncoder {</span> |
| <span class="source-line-no">038</span><span id="line-38"></span> |
| <span class="source-line-no">039</span><span id="line-39"> public static final NoOpDataBlockEncoder INSTANCE = new NoOpDataBlockEncoder();</span> |
| <span class="source-line-no">040</span><span id="line-40"></span> |
| <span class="source-line-no">041</span><span id="line-41"> private static class NoneEncodingState extends EncodingState {</span> |
| <span class="source-line-no">042</span><span id="line-42"> NoneEncoder encoder = null;</span> |
| <span class="source-line-no">043</span><span id="line-43"> }</span> |
| <span class="source-line-no">044</span><span id="line-44"></span> |
| <span class="source-line-no">045</span><span id="line-45"> /** Cannot be instantiated. Use {@link #INSTANCE} instead. */</span> |
| <span class="source-line-no">046</span><span id="line-46"> private NoOpDataBlockEncoder() {</span> |
| <span class="source-line-no">047</span><span id="line-47"> }</span> |
| <span class="source-line-no">048</span><span id="line-48"></span> |
| <span class="source-line-no">049</span><span id="line-49"> @Override</span> |
| <span class="source-line-no">050</span><span id="line-50"> public void encode(ExtendedCell cell, HFileBlockEncodingContext encodingCtx, DataOutputStream out)</span> |
| <span class="source-line-no">051</span><span id="line-51"> throws IOException {</span> |
| <span class="source-line-no">052</span><span id="line-52"> NoneEncodingState state = (NoneEncodingState) encodingCtx.getEncodingState();</span> |
| <span class="source-line-no">053</span><span id="line-53"> NoneEncoder encoder = state.encoder;</span> |
| <span class="source-line-no">054</span><span id="line-54"> int size = encoder.write(cell);</span> |
| <span class="source-line-no">055</span><span id="line-55"> state.postCellEncode(size, size);</span> |
| <span class="source-line-no">056</span><span id="line-56"> }</span> |
| <span class="source-line-no">057</span><span id="line-57"></span> |
| <span class="source-line-no">058</span><span id="line-58"> @Override</span> |
| <span class="source-line-no">059</span><span id="line-59"> public boolean useEncodedScanner() {</span> |
| <span class="source-line-no">060</span><span id="line-60"> return false;</span> |
| <span class="source-line-no">061</span><span id="line-61"> }</span> |
| <span class="source-line-no">062</span><span id="line-62"></span> |
| <span class="source-line-no">063</span><span id="line-63"> @Override</span> |
| <span class="source-line-no">064</span><span id="line-64"> public void saveMetadata(HFile.Writer writer) {</span> |
| <span class="source-line-no">065</span><span id="line-65"> }</span> |
| <span class="source-line-no">066</span><span id="line-66"></span> |
| <span class="source-line-no">067</span><span id="line-67"> @Override</span> |
| <span class="source-line-no">068</span><span id="line-68"> public DataBlockEncoding getDataBlockEncoding() {</span> |
| <span class="source-line-no">069</span><span id="line-69"> return DataBlockEncoding.NONE;</span> |
| <span class="source-line-no">070</span><span id="line-70"> }</span> |
| <span class="source-line-no">071</span><span id="line-71"></span> |
| <span class="source-line-no">072</span><span id="line-72"> @Override</span> |
| <span class="source-line-no">073</span><span id="line-73"> public DataBlockEncoding getEffectiveEncodingInCache(boolean isCompaction) {</span> |
| <span class="source-line-no">074</span><span id="line-74"> return DataBlockEncoding.NONE;</span> |
| <span class="source-line-no">075</span><span id="line-75"> }</span> |
| <span class="source-line-no">076</span><span id="line-76"></span> |
| <span class="source-line-no">077</span><span id="line-77"> @Override</span> |
| <span class="source-line-no">078</span><span id="line-78"> public String toString() {</span> |
| <span class="source-line-no">079</span><span id="line-79"> return getClass().getSimpleName();</span> |
| <span class="source-line-no">080</span><span id="line-80"> }</span> |
| <span class="source-line-no">081</span><span id="line-81"></span> |
| <span class="source-line-no">082</span><span id="line-82"> @Override</span> |
| <span class="source-line-no">083</span><span id="line-83"> public HFileBlockEncodingContext newDataBlockEncodingContext(Configuration conf,</span> |
| <span class="source-line-no">084</span><span id="line-84"> byte[] dummyHeader, HFileContext meta) {</span> |
| <span class="source-line-no">085</span><span id="line-85"> return new HFileBlockDefaultEncodingContext(conf, null, dummyHeader, meta);</span> |
| <span class="source-line-no">086</span><span id="line-86"> }</span> |
| <span class="source-line-no">087</span><span id="line-87"></span> |
| <span class="source-line-no">088</span><span id="line-88"> @Override</span> |
| <span class="source-line-no">089</span><span id="line-89"> public HFileBlockDecodingContext newDataBlockDecodingContext(Configuration conf,</span> |
| <span class="source-line-no">090</span><span id="line-90"> HFileContext meta) {</span> |
| <span class="source-line-no">091</span><span id="line-91"> return new HFileBlockDefaultDecodingContext(conf, meta);</span> |
| <span class="source-line-no">092</span><span id="line-92"> }</span> |
| <span class="source-line-no">093</span><span id="line-93"></span> |
| <span class="source-line-no">094</span><span id="line-94"> @Override</span> |
| <span class="source-line-no">095</span><span id="line-95"> public void startBlockEncoding(HFileBlockEncodingContext blkEncodingCtx, DataOutputStream out)</span> |
| <span class="source-line-no">096</span><span id="line-96"> throws IOException {</span> |
| <span class="source-line-no">097</span><span id="line-97"> if (blkEncodingCtx.getClass() != HFileBlockDefaultEncodingContext.class) {</span> |
| <span class="source-line-no">098</span><span id="line-98"> throw new IOException(this.getClass().getName() + " only accepts "</span> |
| <span class="source-line-no">099</span><span id="line-99"> + HFileBlockDefaultEncodingContext.class.getName() + " as the " + "encoding context.");</span> |
| <span class="source-line-no">100</span><span id="line-100"> }</span> |
| <span class="source-line-no">101</span><span id="line-101"></span> |
| <span class="source-line-no">102</span><span id="line-102"> HFileBlockDefaultEncodingContext encodingCtx =</span> |
| <span class="source-line-no">103</span><span id="line-103"> (HFileBlockDefaultEncodingContext) blkEncodingCtx;</span> |
| <span class="source-line-no">104</span><span id="line-104"> encodingCtx.prepareEncoding(out);</span> |
| <span class="source-line-no">105</span><span id="line-105"></span> |
| <span class="source-line-no">106</span><span id="line-106"> NoneEncoder encoder = new NoneEncoder(out, encodingCtx);</span> |
| <span class="source-line-no">107</span><span id="line-107"> NoneEncodingState state = new NoneEncodingState();</span> |
| <span class="source-line-no">108</span><span id="line-108"> state.encoder = encoder;</span> |
| <span class="source-line-no">109</span><span id="line-109"> blkEncodingCtx.setEncodingState(state);</span> |
| <span class="source-line-no">110</span><span id="line-110"> }</span> |
| <span class="source-line-no">111</span><span id="line-111"></span> |
| <span class="source-line-no">112</span><span id="line-112"> @Override</span> |
| <span class="source-line-no">113</span><span id="line-113"> public void endBlockEncoding(HFileBlockEncodingContext encodingCtx, DataOutputStream out,</span> |
| <span class="source-line-no">114</span><span id="line-114"> byte[] uncompressedBytesWithHeader, BlockType blockType) throws IOException {</span> |
| <span class="source-line-no">115</span><span id="line-115"> encodingCtx.postEncoding(BlockType.DATA);</span> |
| <span class="source-line-no">116</span><span id="line-116"> }</span> |
| <span class="source-line-no">117</span><span id="line-117">}</span> |
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| </pre> |
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