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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.codec;</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.IOException;</span> |
| <span class="source-line-no">021</span><span id="line-21">import java.io.InputStream;</span> |
| <span class="source-line-no">022</span><span id="line-22">import java.io.OutputStream;</span> |
| <span class="source-line-no">023</span><span id="line-23">import java.nio.ByteBuffer;</span> |
| <span class="source-line-no">024</span><span id="line-24">import org.apache.hadoop.hbase.ExtendedCell;</span> |
| <span class="source-line-no">025</span><span id="line-25">import org.apache.hadoop.hbase.HBaseInterfaceAudience;</span> |
| <span class="source-line-no">026</span><span id="line-26">import org.apache.hadoop.hbase.KeyValueUtil;</span> |
| <span class="source-line-no">027</span><span id="line-27">import org.apache.hadoop.hbase.NoTagsByteBufferKeyValue;</span> |
| <span class="source-line-no">028</span><span id="line-28">import org.apache.hadoop.hbase.NoTagsKeyValue;</span> |
| <span class="source-line-no">029</span><span id="line-29">import org.apache.hadoop.hbase.nio.ByteBuff;</span> |
| <span class="source-line-no">030</span><span id="line-30">import org.apache.hadoop.hbase.util.ByteBufferUtils;</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"> * Codec that does KeyValue version 1 serialization.</span> |
| <span class="source-line-no">035</span><span id="line-35"> * <p></span> |
| <span class="source-line-no">036</span><span id="line-36"> * Encodes Cell as serialized in KeyValue with total length prefix. This is how KVs were serialized</span> |
| <span class="source-line-no">037</span><span id="line-37"> * in Puts, Deletes and Results pre-0.96. Its what would happen if you called the Writable#write</span> |
| <span class="source-line-no">038</span><span id="line-38"> * KeyValue implementation. This encoder will fail if the passed Cell is not an old-school pre-0.96</span> |
| <span class="source-line-no">039</span><span id="line-39"> * KeyValue. Does not copy bytes writing. It just writes them direct to the passed stream.</span> |
| <span class="source-line-no">040</span><span id="line-40"> * <p></span> |
| <span class="source-line-no">041</span><span id="line-41"> * If you wrote two KeyValues to this encoder, it would look like this in the stream:</span> |
| <span class="source-line-no">042</span><span id="line-42"> *</span> |
| <span class="source-line-no">043</span><span id="line-43"> * <pre></span> |
| <span class="source-line-no">044</span><span id="line-44"> * length-of-KeyValue1 // A java int with the length of KeyValue1 backing array</span> |
| <span class="source-line-no">045</span><span id="line-45"> * KeyValue1 backing array filled with a KeyValue serialized in its particular format</span> |
| <span class="source-line-no">046</span><span id="line-46"> * length-of-KeyValue2</span> |
| <span class="source-line-no">047</span><span id="line-47"> * KeyValue2 backing array</span> |
| <span class="source-line-no">048</span><span id="line-48"> * </pre></span> |
| <span class="source-line-no">049</span><span id="line-49"> */</span> |
| <span class="source-line-no">050</span><span id="line-50">@InterfaceAudience.LimitedPrivate(HBaseInterfaceAudience.CONFIG)</span> |
| <span class="source-line-no">051</span><span id="line-51">public class KeyValueCodec implements Codec {</span> |
| <span class="source-line-no">052</span><span id="line-52"> public static class KeyValueEncoder extends BaseEncoder {</span> |
| <span class="source-line-no">053</span><span id="line-53"> public KeyValueEncoder(final OutputStream out) {</span> |
| <span class="source-line-no">054</span><span id="line-54"> super(out);</span> |
| <span class="source-line-no">055</span><span id="line-55"> }</span> |
| <span class="source-line-no">056</span><span id="line-56"></span> |
| <span class="source-line-no">057</span><span id="line-57"> @Override</span> |
| <span class="source-line-no">058</span><span id="line-58"> public void write(ExtendedCell cell) throws IOException {</span> |
| <span class="source-line-no">059</span><span id="line-59"> checkFlushed();</span> |
| <span class="source-line-no">060</span><span id="line-60"> // Do not write tags over RPC</span> |
| <span class="source-line-no">061</span><span id="line-61"> ByteBufferUtils.putInt(this.out, KeyValueUtil.getSerializedSize(cell, false));</span> |
| <span class="source-line-no">062</span><span id="line-62"> KeyValueUtil.oswrite(cell, out, false);</span> |
| <span class="source-line-no">063</span><span id="line-63"> }</span> |
| <span class="source-line-no">064</span><span id="line-64"> }</span> |
| <span class="source-line-no">065</span><span id="line-65"></span> |
| <span class="source-line-no">066</span><span id="line-66"> public static class KeyValueDecoder extends BaseDecoder {</span> |
| <span class="source-line-no">067</span><span id="line-67"> public KeyValueDecoder(final InputStream in) {</span> |
| <span class="source-line-no">068</span><span id="line-68"> super(in);</span> |
| <span class="source-line-no">069</span><span id="line-69"> }</span> |
| <span class="source-line-no">070</span><span id="line-70"></span> |
| <span class="source-line-no">071</span><span id="line-71"> @Override</span> |
| <span class="source-line-no">072</span><span id="line-72"> protected ExtendedCell parseCell() throws IOException {</span> |
| <span class="source-line-no">073</span><span id="line-73"> // No tags here</span> |
| <span class="source-line-no">074</span><span id="line-74"> return KeyValueUtil.createKeyValueFromInputStream(in, false);</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"></span> |
| <span class="source-line-no">078</span><span id="line-78"> public static class ByteBuffKeyValueDecoder implements Codec.Decoder {</span> |
| <span class="source-line-no">079</span><span id="line-79"></span> |
| <span class="source-line-no">080</span><span id="line-80"> protected final ByteBuff buf;</span> |
| <span class="source-line-no">081</span><span id="line-81"> protected ExtendedCell current = null;</span> |
| <span class="source-line-no">082</span><span id="line-82"></span> |
| <span class="source-line-no">083</span><span id="line-83"> public ByteBuffKeyValueDecoder(ByteBuff buf) {</span> |
| <span class="source-line-no">084</span><span id="line-84"> this.buf = buf;</span> |
| <span class="source-line-no">085</span><span id="line-85"> }</span> |
| <span class="source-line-no">086</span><span id="line-86"></span> |
| <span class="source-line-no">087</span><span id="line-87"> @Override</span> |
| <span class="source-line-no">088</span><span id="line-88"> public boolean advance() throws IOException {</span> |
| <span class="source-line-no">089</span><span id="line-89"> if (!this.buf.hasRemaining()) {</span> |
| <span class="source-line-no">090</span><span id="line-90"> return false;</span> |
| <span class="source-line-no">091</span><span id="line-91"> }</span> |
| <span class="source-line-no">092</span><span id="line-92"> int len = buf.getInt();</span> |
| <span class="source-line-no">093</span><span id="line-93"> ByteBuffer bb = buf.asSubByteBuffer(len);</span> |
| <span class="source-line-no">094</span><span id="line-94"> if (bb.isDirect()) {</span> |
| <span class="source-line-no">095</span><span id="line-95"> this.current = createCell(bb, bb.position(), len);</span> |
| <span class="source-line-no">096</span><span id="line-96"> } else {</span> |
| <span class="source-line-no">097</span><span id="line-97"> this.current = createCell(bb.array(), bb.arrayOffset() + bb.position(), len);</span> |
| <span class="source-line-no">098</span><span id="line-98"> }</span> |
| <span class="source-line-no">099</span><span id="line-99"> buf.skip(len);</span> |
| <span class="source-line-no">100</span><span id="line-100"> return true;</span> |
| <span class="source-line-no">101</span><span id="line-101"> }</span> |
| <span class="source-line-no">102</span><span id="line-102"></span> |
| <span class="source-line-no">103</span><span id="line-103"> @Override</span> |
| <span class="source-line-no">104</span><span id="line-104"> public ExtendedCell current() {</span> |
| <span class="source-line-no">105</span><span id="line-105"> return this.current;</span> |
| <span class="source-line-no">106</span><span id="line-106"> }</span> |
| <span class="source-line-no">107</span><span id="line-107"></span> |
| <span class="source-line-no">108</span><span id="line-108"> protected ExtendedCell createCell(byte[] buf, int offset, int len) {</span> |
| <span class="source-line-no">109</span><span id="line-109"> return new NoTagsKeyValue(buf, offset, len);</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"> protected ExtendedCell createCell(ByteBuffer bb, int pos, int len) {</span> |
| <span class="source-line-no">113</span><span id="line-113"> // We know there is not going to be any tags.</span> |
| <span class="source-line-no">114</span><span id="line-114"> return new NoTagsByteBufferKeyValue(bb, pos, len);</span> |
| <span class="source-line-no">115</span><span id="line-115"> }</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> |
| <span class="source-line-no">118</span><span id="line-118"> /**</span> |
| <span class="source-line-no">119</span><span id="line-119"> * Implementation depends on {@link InputStream#available()}</span> |
| <span class="source-line-no">120</span><span id="line-120"> */</span> |
| <span class="source-line-no">121</span><span id="line-121"> @Override</span> |
| <span class="source-line-no">122</span><span id="line-122"> public Decoder getDecoder(final InputStream is) {</span> |
| <span class="source-line-no">123</span><span id="line-123"> return new KeyValueDecoder(is);</span> |
| <span class="source-line-no">124</span><span id="line-124"> }</span> |
| <span class="source-line-no">125</span><span id="line-125"></span> |
| <span class="source-line-no">126</span><span id="line-126"> @Override</span> |
| <span class="source-line-no">127</span><span id="line-127"> public Decoder getDecoder(ByteBuff buf) {</span> |
| <span class="source-line-no">128</span><span id="line-128"> return new ByteBuffKeyValueDecoder(buf);</span> |
| <span class="source-line-no">129</span><span id="line-129"> }</span> |
| <span class="source-line-no">130</span><span id="line-130"></span> |
| <span class="source-line-no">131</span><span id="line-131"> @Override</span> |
| <span class="source-line-no">132</span><span id="line-132"> public Encoder getEncoder(OutputStream os) {</span> |
| <span class="source-line-no">133</span><span id="line-133"> return new KeyValueEncoder(os);</span> |
| <span class="source-line-no">134</span><span id="line-134"> }</span> |
| <span class="source-line-no">135</span><span id="line-135">}</span> |
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| </pre> |
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