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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.encoding;</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.DataInputStream;</span> |
| <span class="source-line-no">021</span><span id="line-21">import java.io.DataOutput;</span> |
| <span class="source-line-no">022</span><span id="line-22">import java.io.DataOutputStream;</span> |
| <span class="source-line-no">023</span><span id="line-23">import java.io.IOException;</span> |
| <span class="source-line-no">024</span><span id="line-24">import java.nio.ByteBuffer;</span> |
| <span class="source-line-no">025</span><span id="line-25">import org.apache.hadoop.hbase.ExtendedCell;</span> |
| <span class="source-line-no">026</span><span id="line-26">import org.apache.hadoop.hbase.KeyValue;</span> |
| <span class="source-line-no">027</span><span id="line-27">import org.apache.hadoop.hbase.KeyValueUtil;</span> |
| <span class="source-line-no">028</span><span id="line-28">import org.apache.hadoop.hbase.PrivateCellUtil;</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.hadoop.hbase.util.Bytes;</span> |
| <span class="source-line-no">032</span><span id="line-32">import org.apache.hadoop.hbase.util.ObjectIntPair;</span> |
| <span class="source-line-no">033</span><span id="line-33">import org.apache.yetus.audience.InterfaceAudience;</span> |
| <span class="source-line-no">034</span><span id="line-34"></span> |
| <span class="source-line-no">035</span><span id="line-35">/**</span> |
| <span class="source-line-no">036</span><span id="line-36"> * Encoder similar to {@link DiffKeyDeltaEncoder} but supposedly faster. Compress using: - store</span> |
| <span class="source-line-no">037</span><span id="line-37"> * size of common prefix - save column family once in the first KeyValue - use integer compression</span> |
| <span class="source-line-no">038</span><span id="line-38"> * for key, value and prefix (7-bit encoding) - use bits to avoid duplication key length, value</span> |
| <span class="source-line-no">039</span><span id="line-39"> * length and type if it same as previous - store in 3 bits length of prefix timestamp with previous</span> |
| <span class="source-line-no">040</span><span id="line-40"> * KeyValue's timestamp - one bit which allow to omit value if it is the same Format: - 1 byte: flag</span> |
| <span class="source-line-no">041</span><span id="line-41"> * - 1-5 bytes: key length (only if FLAG_SAME_KEY_LENGTH is not set in flag) - 1-5 bytes: value</span> |
| <span class="source-line-no">042</span><span id="line-42"> * length (only if FLAG_SAME_VALUE_LENGTH is not set in flag) - 1-5 bytes: prefix length - ...</span> |
| <span class="source-line-no">043</span><span id="line-43"> * bytes: rest of the row (if prefix length is small enough) - ... bytes: qualifier (or suffix</span> |
| <span class="source-line-no">044</span><span id="line-44"> * depending on prefix length) - 1-8 bytes: timestamp suffix - 1 byte: type (only if FLAG_SAME_TYPE</span> |
| <span class="source-line-no">045</span><span id="line-45"> * is not set in the flag) - ... bytes: value (only if FLAG_SAME_VALUE is not set in the flag)</span> |
| <span class="source-line-no">046</span><span id="line-46"> */</span> |
| <span class="source-line-no">047</span><span id="line-47">@InterfaceAudience.Private</span> |
| <span class="source-line-no">048</span><span id="line-48">public class FastDiffDeltaEncoder extends BufferedDataBlockEncoder {</span> |
| <span class="source-line-no">049</span><span id="line-49"> static final int MASK_TIMESTAMP_LENGTH = (1 << 0) | (1 << 1) | (1 << 2);</span> |
| <span class="source-line-no">050</span><span id="line-50"> static final int SHIFT_TIMESTAMP_LENGTH = 0;</span> |
| <span class="source-line-no">051</span><span id="line-51"> static final int FLAG_SAME_KEY_LENGTH = 1 << 3;</span> |
| <span class="source-line-no">052</span><span id="line-52"> static final int FLAG_SAME_VALUE_LENGTH = 1 << 4;</span> |
| <span class="source-line-no">053</span><span id="line-53"> static final int FLAG_SAME_TYPE = 1 << 5;</span> |
| <span class="source-line-no">054</span><span id="line-54"> static final int FLAG_SAME_VALUE = 1 << 6;</span> |
| <span class="source-line-no">055</span><span id="line-55"></span> |
| <span class="source-line-no">056</span><span id="line-56"> private static class FastDiffCompressionState extends CompressionState {</span> |
| <span class="source-line-no">057</span><span id="line-57"> byte[] timestamp = new byte[KeyValue.TIMESTAMP_SIZE];</span> |
| <span class="source-line-no">058</span><span id="line-58"> int prevTimestampOffset;</span> |
| <span class="source-line-no">059</span><span id="line-59"></span> |
| <span class="source-line-no">060</span><span id="line-60"> @Override</span> |
| <span class="source-line-no">061</span><span id="line-61"> protected void readTimestamp(ByteBuffer in) {</span> |
| <span class="source-line-no">062</span><span id="line-62"> in.get(timestamp);</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"> @Override</span> |
| <span class="source-line-no">066</span><span id="line-66"> void copyFrom(CompressionState state) {</span> |
| <span class="source-line-no">067</span><span id="line-67"> super.copyFrom(state);</span> |
| <span class="source-line-no">068</span><span id="line-68"> FastDiffCompressionState state2 = (FastDiffCompressionState) state;</span> |
| <span class="source-line-no">069</span><span id="line-69"> System.arraycopy(state2.timestamp, 0, timestamp, 0, KeyValue.TIMESTAMP_SIZE);</span> |
| <span class="source-line-no">070</span><span id="line-70"> prevTimestampOffset = state2.prevTimestampOffset;</span> |
| <span class="source-line-no">071</span><span id="line-71"> }</span> |
| <span class="source-line-no">072</span><span id="line-72"></span> |
| <span class="source-line-no">073</span><span id="line-73"> /**</span> |
| <span class="source-line-no">074</span><span id="line-74"> * Copies the first key/value from the given stream, and initializes decompression state based</span> |
| <span class="source-line-no">075</span><span id="line-75"> * on it. Assumes that we have already read key and value lengths. Does not set</span> |
| <span class="source-line-no">076</span><span id="line-76"> * {@link #qualifierLength} (not used by decompression) or {@link #prevOffset} (set by the calle</span> |
| <span class="source-line-no">077</span><span id="line-77"> * afterwards).</span> |
| <span class="source-line-no">078</span><span id="line-78"> */</span> |
| <span class="source-line-no">079</span><span id="line-79"> private void decompressFirstKV(ByteBuffer out, DataInputStream in) throws IOException {</span> |
| <span class="source-line-no">080</span><span id="line-80"> int kvPos = out.position();</span> |
| <span class="source-line-no">081</span><span id="line-81"> out.putInt(keyLength);</span> |
| <span class="source-line-no">082</span><span id="line-82"> out.putInt(valueLength);</span> |
| <span class="source-line-no">083</span><span id="line-83"> prevTimestampOffset = out.position() + keyLength - KeyValue.TIMESTAMP_TYPE_SIZE;</span> |
| <span class="source-line-no">084</span><span id="line-84"> ByteBufferUtils.copyFromStreamToBuffer(out, in, keyLength + valueLength);</span> |
| <span class="source-line-no">085</span><span id="line-85"> rowLength = out.getShort(kvPos + KeyValue.ROW_OFFSET);</span> |
| <span class="source-line-no">086</span><span id="line-86"> familyLength = out.get(kvPos + KeyValue.ROW_OFFSET + KeyValue.ROW_LENGTH_SIZE + rowLength);</span> |
| <span class="source-line-no">087</span><span id="line-87"> type = out.get(prevTimestampOffset + KeyValue.TIMESTAMP_SIZE);</span> |
| <span class="source-line-no">088</span><span id="line-88"> }</span> |
| <span class="source-line-no">089</span><span id="line-89"></span> |
| <span class="source-line-no">090</span><span id="line-90"> }</span> |
| <span class="source-line-no">091</span><span id="line-91"></span> |
| <span class="source-line-no">092</span><span id="line-92"> private int findCommonTimestampPrefix(byte[] curTsBuf, byte[] prevTsBuf) {</span> |
| <span class="source-line-no">093</span><span id="line-93"> int commonPrefix = 0;</span> |
| <span class="source-line-no">094</span><span id="line-94"> while (</span> |
| <span class="source-line-no">095</span><span id="line-95"> commonPrefix < (KeyValue.TIMESTAMP_SIZE - 1)</span> |
| <span class="source-line-no">096</span><span id="line-96"> && curTsBuf[commonPrefix] == prevTsBuf[commonPrefix]</span> |
| <span class="source-line-no">097</span><span id="line-97"> ) {</span> |
| <span class="source-line-no">098</span><span id="line-98"> commonPrefix++;</span> |
| <span class="source-line-no">099</span><span id="line-99"> }</span> |
| <span class="source-line-no">100</span><span id="line-100"> return commonPrefix; // has to be at most 7 bytes</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"> private void uncompressSingleKeyValue(DataInputStream source, ByteBuffer out,</span> |
| <span class="source-line-no">104</span><span id="line-104"> FastDiffCompressionState state) throws IOException, EncoderBufferTooSmallException {</span> |
| <span class="source-line-no">105</span><span id="line-105"> byte flag = source.readByte();</span> |
| <span class="source-line-no">106</span><span id="line-106"> int prevKeyLength = state.keyLength;</span> |
| <span class="source-line-no">107</span><span id="line-107"></span> |
| <span class="source-line-no">108</span><span id="line-108"> if ((flag & FLAG_SAME_KEY_LENGTH) == 0) {</span> |
| <span class="source-line-no">109</span><span id="line-109"> state.keyLength = ByteBufferUtils.readCompressedInt(source);</span> |
| <span class="source-line-no">110</span><span id="line-110"> }</span> |
| <span class="source-line-no">111</span><span id="line-111"> if ((flag & FLAG_SAME_VALUE_LENGTH) == 0) {</span> |
| <span class="source-line-no">112</span><span id="line-112"> state.valueLength = ByteBufferUtils.readCompressedInt(source);</span> |
| <span class="source-line-no">113</span><span id="line-113"> }</span> |
| <span class="source-line-no">114</span><span id="line-114"> int commonLength = ByteBufferUtils.readCompressedInt(source);</span> |
| <span class="source-line-no">115</span><span id="line-115"></span> |
| <span class="source-line-no">116</span><span id="line-116"> ensureSpace(out, state.keyLength + state.valueLength + KeyValue.ROW_OFFSET);</span> |
| <span class="source-line-no">117</span><span id="line-117"></span> |
| <span class="source-line-no">118</span><span id="line-118"> int kvPos = out.position();</span> |
| <span class="source-line-no">119</span><span id="line-119"></span> |
| <span class="source-line-no">120</span><span id="line-120"> if (!state.isFirst()) {</span> |
| <span class="source-line-no">121</span><span id="line-121"> // copy the prefix</span> |
| <span class="source-line-no">122</span><span id="line-122"> int common;</span> |
| <span class="source-line-no">123</span><span id="line-123"> int prevOffset;</span> |
| <span class="source-line-no">124</span><span id="line-124"></span> |
| <span class="source-line-no">125</span><span id="line-125"> if ((flag & FLAG_SAME_VALUE_LENGTH) == 0) {</span> |
| <span class="source-line-no">126</span><span id="line-126"> out.putInt(state.keyLength);</span> |
| <span class="source-line-no">127</span><span id="line-127"> out.putInt(state.valueLength);</span> |
| <span class="source-line-no">128</span><span id="line-128"> prevOffset = state.prevOffset + KeyValue.ROW_OFFSET;</span> |
| <span class="source-line-no">129</span><span id="line-129"> common = commonLength;</span> |
| <span class="source-line-no">130</span><span id="line-130"> } else {</span> |
| <span class="source-line-no">131</span><span id="line-131"> if ((flag & FLAG_SAME_KEY_LENGTH) != 0) {</span> |
| <span class="source-line-no">132</span><span id="line-132"> prevOffset = state.prevOffset;</span> |
| <span class="source-line-no">133</span><span id="line-133"> common = commonLength + KeyValue.ROW_OFFSET;</span> |
| <span class="source-line-no">134</span><span id="line-134"> } else {</span> |
| <span class="source-line-no">135</span><span id="line-135"> out.putInt(state.keyLength);</span> |
| <span class="source-line-no">136</span><span id="line-136"> prevOffset = state.prevOffset + KeyValue.KEY_LENGTH_SIZE;</span> |
| <span class="source-line-no">137</span><span id="line-137"> common = commonLength + KeyValue.KEY_LENGTH_SIZE;</span> |
| <span class="source-line-no">138</span><span id="line-138"> }</span> |
| <span class="source-line-no">139</span><span id="line-139"> }</span> |
| <span class="source-line-no">140</span><span id="line-140"></span> |
| <span class="source-line-no">141</span><span id="line-141"> ByteBufferUtils.copyFromBufferToBuffer(out, out, prevOffset, common);</span> |
| <span class="source-line-no">142</span><span id="line-142"></span> |
| <span class="source-line-no">143</span><span id="line-143"> // copy the rest of the key from the buffer</span> |
| <span class="source-line-no">144</span><span id="line-144"> int keyRestLength;</span> |
| <span class="source-line-no">145</span><span id="line-145"> if (commonLength < state.rowLength + KeyValue.ROW_LENGTH_SIZE) {</span> |
| <span class="source-line-no">146</span><span id="line-146"> // omit the family part of the key, it is always the same</span> |
| <span class="source-line-no">147</span><span id="line-147"> int rowWithSizeLength;</span> |
| <span class="source-line-no">148</span><span id="line-148"> int rowRestLength;</span> |
| <span class="source-line-no">149</span><span id="line-149"></span> |
| <span class="source-line-no">150</span><span id="line-150"> // check length of row</span> |
| <span class="source-line-no">151</span><span id="line-151"> if (commonLength < KeyValue.ROW_LENGTH_SIZE) {</span> |
| <span class="source-line-no">152</span><span id="line-152"> // not yet copied, do it now</span> |
| <span class="source-line-no">153</span><span id="line-153"> ByteBufferUtils.copyFromStreamToBuffer(out, source,</span> |
| <span class="source-line-no">154</span><span id="line-154"> KeyValue.ROW_LENGTH_SIZE - commonLength);</span> |
| <span class="source-line-no">155</span><span id="line-155"></span> |
| <span class="source-line-no">156</span><span id="line-156"> rowWithSizeLength =</span> |
| <span class="source-line-no">157</span><span id="line-157"> out.getShort(out.position() - KeyValue.ROW_LENGTH_SIZE) + KeyValue.ROW_LENGTH_SIZE;</span> |
| <span class="source-line-no">158</span><span id="line-158"> rowRestLength = rowWithSizeLength - KeyValue.ROW_LENGTH_SIZE;</span> |
| <span class="source-line-no">159</span><span id="line-159"> } else {</span> |
| <span class="source-line-no">160</span><span id="line-160"> // already in kvBuffer, just read it</span> |
| <span class="source-line-no">161</span><span id="line-161"> rowWithSizeLength = out.getShort(kvPos + KeyValue.ROW_OFFSET) + KeyValue.ROW_LENGTH_SIZE;</span> |
| <span class="source-line-no">162</span><span id="line-162"> rowRestLength = rowWithSizeLength - commonLength;</span> |
| <span class="source-line-no">163</span><span id="line-163"> }</span> |
| <span class="source-line-no">164</span><span id="line-164"></span> |
| <span class="source-line-no">165</span><span id="line-165"> // copy the rest of row</span> |
| <span class="source-line-no">166</span><span id="line-166"> ByteBufferUtils.copyFromStreamToBuffer(out, source, rowRestLength);</span> |
| <span class="source-line-no">167</span><span id="line-167"></span> |
| <span class="source-line-no">168</span><span id="line-168"> // copy the column family</span> |
| <span class="source-line-no">169</span><span id="line-169"> ByteBufferUtils.copyFromBufferToBuffer(out, out,</span> |
| <span class="source-line-no">170</span><span id="line-170"> state.prevOffset + KeyValue.ROW_OFFSET + KeyValue.ROW_LENGTH_SIZE + state.rowLength,</span> |
| <span class="source-line-no">171</span><span id="line-171"> state.familyLength + KeyValue.FAMILY_LENGTH_SIZE);</span> |
| <span class="source-line-no">172</span><span id="line-172"> state.rowLength = (short) (rowWithSizeLength - KeyValue.ROW_LENGTH_SIZE);</span> |
| <span class="source-line-no">173</span><span id="line-173"></span> |
| <span class="source-line-no">174</span><span id="line-174"> keyRestLength = state.keyLength - rowWithSizeLength - state.familyLength</span> |
| <span class="source-line-no">175</span><span id="line-175"> - (KeyValue.FAMILY_LENGTH_SIZE + KeyValue.TIMESTAMP_TYPE_SIZE);</span> |
| <span class="source-line-no">176</span><span id="line-176"> } else {</span> |
| <span class="source-line-no">177</span><span id="line-177"> // prevRowWithSizeLength is the same as on previous row</span> |
| <span class="source-line-no">178</span><span id="line-178"> keyRestLength = state.keyLength - commonLength - KeyValue.TIMESTAMP_TYPE_SIZE;</span> |
| <span class="source-line-no">179</span><span id="line-179"> }</span> |
| <span class="source-line-no">180</span><span id="line-180"> // copy the rest of the key, after column family == column qualifier</span> |
| <span class="source-line-no">181</span><span id="line-181"> ByteBufferUtils.copyFromStreamToBuffer(out, source, keyRestLength);</span> |
| <span class="source-line-no">182</span><span id="line-182"></span> |
| <span class="source-line-no">183</span><span id="line-183"> // copy timestamp</span> |
| <span class="source-line-no">184</span><span id="line-184"> int prefixTimestamp = (flag & MASK_TIMESTAMP_LENGTH) >>> SHIFT_TIMESTAMP_LENGTH;</span> |
| <span class="source-line-no">185</span><span id="line-185"> ByteBufferUtils.copyFromBufferToBuffer(out, out, state.prevTimestampOffset, prefixTimestamp);</span> |
| <span class="source-line-no">186</span><span id="line-186"> state.prevTimestampOffset = out.position() - prefixTimestamp;</span> |
| <span class="source-line-no">187</span><span id="line-187"> ByteBufferUtils.copyFromStreamToBuffer(out, source,</span> |
| <span class="source-line-no">188</span><span id="line-188"> KeyValue.TIMESTAMP_SIZE - prefixTimestamp);</span> |
| <span class="source-line-no">189</span><span id="line-189"></span> |
| <span class="source-line-no">190</span><span id="line-190"> // copy the type and value</span> |
| <span class="source-line-no">191</span><span id="line-191"> if ((flag & FLAG_SAME_TYPE) != 0) {</span> |
| <span class="source-line-no">192</span><span id="line-192"> out.put(state.type);</span> |
| <span class="source-line-no">193</span><span id="line-193"> if ((flag & FLAG_SAME_VALUE) != 0) {</span> |
| <span class="source-line-no">194</span><span id="line-194"> ByteBufferUtils.copyFromBufferToBuffer(out, out,</span> |
| <span class="source-line-no">195</span><span id="line-195"> state.prevOffset + KeyValue.ROW_OFFSET + prevKeyLength, state.valueLength);</span> |
| <span class="source-line-no">196</span><span id="line-196"> } else {</span> |
| <span class="source-line-no">197</span><span id="line-197"> ByteBufferUtils.copyFromStreamToBuffer(out, source, state.valueLength);</span> |
| <span class="source-line-no">198</span><span id="line-198"> }</span> |
| <span class="source-line-no">199</span><span id="line-199"> } else {</span> |
| <span class="source-line-no">200</span><span id="line-200"> if ((flag & FLAG_SAME_VALUE) != 0) {</span> |
| <span class="source-line-no">201</span><span id="line-201"> ByteBufferUtils.copyFromStreamToBuffer(out, source, KeyValue.TYPE_SIZE);</span> |
| <span class="source-line-no">202</span><span id="line-202"> ByteBufferUtils.copyFromBufferToBuffer(out, out,</span> |
| <span class="source-line-no">203</span><span id="line-203"> state.prevOffset + KeyValue.ROW_OFFSET + prevKeyLength, state.valueLength);</span> |
| <span class="source-line-no">204</span><span id="line-204"> } else {</span> |
| <span class="source-line-no">205</span><span id="line-205"> ByteBufferUtils.copyFromStreamToBuffer(out, source,</span> |
| <span class="source-line-no">206</span><span id="line-206"> state.valueLength + KeyValue.TYPE_SIZE);</span> |
| <span class="source-line-no">207</span><span id="line-207"> }</span> |
| <span class="source-line-no">208</span><span id="line-208"> state.type = out.get(state.prevTimestampOffset + KeyValue.TIMESTAMP_SIZE);</span> |
| <span class="source-line-no">209</span><span id="line-209"> }</span> |
| <span class="source-line-no">210</span><span id="line-210"> } else { // this is the first element</span> |
| <span class="source-line-no">211</span><span id="line-211"> state.decompressFirstKV(out, source);</span> |
| <span class="source-line-no">212</span><span id="line-212"> }</span> |
| <span class="source-line-no">213</span><span id="line-213"></span> |
| <span class="source-line-no">214</span><span id="line-214"> state.prevOffset = kvPos;</span> |
| <span class="source-line-no">215</span><span id="line-215"> }</span> |
| <span class="source-line-no">216</span><span id="line-216"></span> |
| <span class="source-line-no">217</span><span id="line-217"> @Override</span> |
| <span class="source-line-no">218</span><span id="line-218"> public int internalEncode(ExtendedCell cell, HFileBlockDefaultEncodingContext encodingContext,</span> |
| <span class="source-line-no">219</span><span id="line-219"> DataOutputStream out) throws IOException {</span> |
| <span class="source-line-no">220</span><span id="line-220"> EncodingState state = encodingContext.getEncodingState();</span> |
| <span class="source-line-no">221</span><span id="line-221"> int size = compressSingleKeyValue(out, cell, state.prevCell);</span> |
| <span class="source-line-no">222</span><span id="line-222"> size += afterEncodingKeyValue(cell, out, encodingContext);</span> |
| <span class="source-line-no">223</span><span id="line-223"> state.prevCell = cell;</span> |
| <span class="source-line-no">224</span><span id="line-224"> return size;</span> |
| <span class="source-line-no">225</span><span id="line-225"> }</span> |
| <span class="source-line-no">226</span><span id="line-226"></span> |
| <span class="source-line-no">227</span><span id="line-227"> private int compressSingleKeyValue(DataOutputStream out, ExtendedCell cell, ExtendedCell prevCell)</span> |
| <span class="source-line-no">228</span><span id="line-228"> throws IOException {</span> |
| <span class="source-line-no">229</span><span id="line-229"> int flag = 0; // Do not use more bits than will fit into a byte</span> |
| <span class="source-line-no">230</span><span id="line-230"> int kLength = KeyValueUtil.keyLength(cell);</span> |
| <span class="source-line-no">231</span><span id="line-231"> int vLength = cell.getValueLength();</span> |
| <span class="source-line-no">232</span><span id="line-232"></span> |
| <span class="source-line-no">233</span><span id="line-233"> if (prevCell == null) {</span> |
| <span class="source-line-no">234</span><span id="line-234"> // copy the key, there is no common prefix with none</span> |
| <span class="source-line-no">235</span><span id="line-235"> out.write(flag);</span> |
| <span class="source-line-no">236</span><span id="line-236"> ByteBufferUtils.putCompressedInt(out, kLength);</span> |
| <span class="source-line-no">237</span><span id="line-237"> ByteBufferUtils.putCompressedInt(out, vLength);</span> |
| <span class="source-line-no">238</span><span id="line-238"> ByteBufferUtils.putCompressedInt(out, 0);</span> |
| <span class="source-line-no">239</span><span id="line-239"> PrivateCellUtil.writeFlatKey(cell, (DataOutput) out);</span> |
| <span class="source-line-no">240</span><span id="line-240"> // Write the value part</span> |
| <span class="source-line-no">241</span><span id="line-241"> PrivateCellUtil.writeValue(out, cell, cell.getValueLength());</span> |
| <span class="source-line-no">242</span><span id="line-242"> } else {</span> |
| <span class="source-line-no">243</span><span id="line-243"> int preKeyLength = KeyValueUtil.keyLength(prevCell);</span> |
| <span class="source-line-no">244</span><span id="line-244"> int preValLength = prevCell.getValueLength();</span> |
| <span class="source-line-no">245</span><span id="line-245"> // find a common prefix and skip it</span> |
| <span class="source-line-no">246</span><span id="line-246"> int commonPrefix = PrivateCellUtil.findCommonPrefixInFlatKey(cell, prevCell, true, false);</span> |
| <span class="source-line-no">247</span><span id="line-247"></span> |
| <span class="source-line-no">248</span><span id="line-248"> if (kLength == preKeyLength) {</span> |
| <span class="source-line-no">249</span><span id="line-249"> flag |= FLAG_SAME_KEY_LENGTH;</span> |
| <span class="source-line-no">250</span><span id="line-250"> }</span> |
| <span class="source-line-no">251</span><span id="line-251"> if (vLength == prevCell.getValueLength()) {</span> |
| <span class="source-line-no">252</span><span id="line-252"> flag |= FLAG_SAME_VALUE_LENGTH;</span> |
| <span class="source-line-no">253</span><span id="line-253"> }</span> |
| <span class="source-line-no">254</span><span id="line-254"> if (cell.getTypeByte() == prevCell.getTypeByte()) {</span> |
| <span class="source-line-no">255</span><span id="line-255"> flag |= FLAG_SAME_TYPE;</span> |
| <span class="source-line-no">256</span><span id="line-256"> }</span> |
| <span class="source-line-no">257</span><span id="line-257"></span> |
| <span class="source-line-no">258</span><span id="line-258"> byte[] curTsBuf = Bytes.toBytes(cell.getTimestamp());</span> |
| <span class="source-line-no">259</span><span id="line-259"> int commonTimestampPrefix =</span> |
| <span class="source-line-no">260</span><span id="line-260"> findCommonTimestampPrefix(curTsBuf, Bytes.toBytes(prevCell.getTimestamp()));</span> |
| <span class="source-line-no">261</span><span id="line-261"></span> |
| <span class="source-line-no">262</span><span id="line-262"> flag |= commonTimestampPrefix << SHIFT_TIMESTAMP_LENGTH;</span> |
| <span class="source-line-no">263</span><span id="line-263"></span> |
| <span class="source-line-no">264</span><span id="line-264"> // Check if current and previous values are the same. Compare value</span> |
| <span class="source-line-no">265</span><span id="line-265"> // length first as an optimization.</span> |
| <span class="source-line-no">266</span><span id="line-266"> if (</span> |
| <span class="source-line-no">267</span><span id="line-267"> vLength == preValLength</span> |
| <span class="source-line-no">268</span><span id="line-268"> && PrivateCellUtil.matchingValue(cell, prevCell, vLength, preValLength)</span> |
| <span class="source-line-no">269</span><span id="line-269"> ) {</span> |
| <span class="source-line-no">270</span><span id="line-270"> flag |= FLAG_SAME_VALUE;</span> |
| <span class="source-line-no">271</span><span id="line-271"> }</span> |
| <span class="source-line-no">272</span><span id="line-272"></span> |
| <span class="source-line-no">273</span><span id="line-273"> out.write(flag);</span> |
| <span class="source-line-no">274</span><span id="line-274"> if ((flag & FLAG_SAME_KEY_LENGTH) == 0) {</span> |
| <span class="source-line-no">275</span><span id="line-275"> ByteBufferUtils.putCompressedInt(out, kLength);</span> |
| <span class="source-line-no">276</span><span id="line-276"> }</span> |
| <span class="source-line-no">277</span><span id="line-277"> if ((flag & FLAG_SAME_VALUE_LENGTH) == 0) {</span> |
| <span class="source-line-no">278</span><span id="line-278"> ByteBufferUtils.putCompressedInt(out, vLength);</span> |
| <span class="source-line-no">279</span><span id="line-279"> }</span> |
| <span class="source-line-no">280</span><span id="line-280"> ByteBufferUtils.putCompressedInt(out, commonPrefix);</span> |
| <span class="source-line-no">281</span><span id="line-281"> short rLen = cell.getRowLength();</span> |
| <span class="source-line-no">282</span><span id="line-282"> if (commonPrefix < rLen + KeyValue.ROW_LENGTH_SIZE) {</span> |
| <span class="source-line-no">283</span><span id="line-283"> // Previous and current rows are different. Copy the differing part of</span> |
| <span class="source-line-no">284</span><span id="line-284"> // the row, skip the column family, and copy the qualifier.</span> |
| <span class="source-line-no">285</span><span id="line-285"> PrivateCellUtil.writeRowKeyExcludingCommon(cell, rLen, commonPrefix, out);</span> |
| <span class="source-line-no">286</span><span id="line-286"> PrivateCellUtil.writeQualifier(out, cell, cell.getQualifierLength());</span> |
| <span class="source-line-no">287</span><span id="line-287"> } else {</span> |
| <span class="source-line-no">288</span><span id="line-288"> // The common part includes the whole row. As the column family is the</span> |
| <span class="source-line-no">289</span><span id="line-289"> // same across the whole file, it will automatically be included in the</span> |
| <span class="source-line-no">290</span><span id="line-290"> // common prefix, so we need not special-case it here.</span> |
| <span class="source-line-no">291</span><span id="line-291"> // What we write here is the non common part of the qualifier</span> |
| <span class="source-line-no">292</span><span id="line-292"> int commonQualPrefix = commonPrefix - (rLen + KeyValue.ROW_LENGTH_SIZE)</span> |
| <span class="source-line-no">293</span><span id="line-293"> - (cell.getFamilyLength() + KeyValue.FAMILY_LENGTH_SIZE);</span> |
| <span class="source-line-no">294</span><span id="line-294"> PrivateCellUtil.writeQualifierSkippingBytes(out, cell, cell.getQualifierLength(),</span> |
| <span class="source-line-no">295</span><span id="line-295"> commonQualPrefix);</span> |
| <span class="source-line-no">296</span><span id="line-296"> }</span> |
| <span class="source-line-no">297</span><span id="line-297"> // Write non common ts part</span> |
| <span class="source-line-no">298</span><span id="line-298"> out.write(curTsBuf, commonTimestampPrefix, KeyValue.TIMESTAMP_SIZE - commonTimestampPrefix);</span> |
| <span class="source-line-no">299</span><span id="line-299"></span> |
| <span class="source-line-no">300</span><span id="line-300"> // Write the type if it is not the same as before.</span> |
| <span class="source-line-no">301</span><span id="line-301"> if ((flag & FLAG_SAME_TYPE) == 0) {</span> |
| <span class="source-line-no">302</span><span id="line-302"> out.write(cell.getTypeByte());</span> |
| <span class="source-line-no">303</span><span id="line-303"> }</span> |
| <span class="source-line-no">304</span><span id="line-304"></span> |
| <span class="source-line-no">305</span><span id="line-305"> // Write the value if it is not the same as before.</span> |
| <span class="source-line-no">306</span><span id="line-306"> if ((flag & FLAG_SAME_VALUE) == 0) {</span> |
| <span class="source-line-no">307</span><span id="line-307"> PrivateCellUtil.writeValue(out, cell, vLength);</span> |
| <span class="source-line-no">308</span><span id="line-308"> }</span> |
| <span class="source-line-no">309</span><span id="line-309"> }</span> |
| <span class="source-line-no">310</span><span id="line-310"> return kLength + vLength + KeyValue.KEYVALUE_INFRASTRUCTURE_SIZE;</span> |
| <span class="source-line-no">311</span><span id="line-311"> }</span> |
| <span class="source-line-no">312</span><span id="line-312"></span> |
| <span class="source-line-no">313</span><span id="line-313"> @Override</span> |
| <span class="source-line-no">314</span><span id="line-314"> protected ByteBuffer internalDecodeKeyValues(DataInputStream source, int allocateHeaderLength,</span> |
| <span class="source-line-no">315</span><span id="line-315"> int skipLastBytes, HFileBlockDefaultDecodingContext decodingCtx) throws IOException {</span> |
| <span class="source-line-no">316</span><span id="line-316"> int decompressedSize = source.readInt();</span> |
| <span class="source-line-no">317</span><span id="line-317"> ByteBuffer buffer = ByteBuffer.allocate(decompressedSize + allocateHeaderLength);</span> |
| <span class="source-line-no">318</span><span id="line-318"> buffer.position(allocateHeaderLength);</span> |
| <span class="source-line-no">319</span><span id="line-319"> FastDiffCompressionState state = new FastDiffCompressionState();</span> |
| <span class="source-line-no">320</span><span id="line-320"> while (source.available() > skipLastBytes) {</span> |
| <span class="source-line-no">321</span><span id="line-321"> uncompressSingleKeyValue(source, buffer, state);</span> |
| <span class="source-line-no">322</span><span id="line-322"> afterDecodingKeyValue(source, buffer, decodingCtx);</span> |
| <span class="source-line-no">323</span><span id="line-323"> }</span> |
| <span class="source-line-no">324</span><span id="line-324"></span> |
| <span class="source-line-no">325</span><span id="line-325"> if (source.available() != skipLastBytes) {</span> |
| <span class="source-line-no">326</span><span id="line-326"> throw new IllegalStateException("Read too much bytes.");</span> |
| <span class="source-line-no">327</span><span id="line-327"> }</span> |
| <span class="source-line-no">328</span><span id="line-328"></span> |
| <span class="source-line-no">329</span><span id="line-329"> return buffer;</span> |
| <span class="source-line-no">330</span><span id="line-330"> }</span> |
| <span class="source-line-no">331</span><span id="line-331"></span> |
| <span class="source-line-no">332</span><span id="line-332"> @Override</span> |
| <span class="source-line-no">333</span><span id="line-333"> public ExtendedCell getFirstKeyCellInBlock(ByteBuff block) {</span> |
| <span class="source-line-no">334</span><span id="line-334"> block.mark();</span> |
| <span class="source-line-no">335</span><span id="line-335"> block.position(Bytes.SIZEOF_INT + Bytes.SIZEOF_BYTE);</span> |
| <span class="source-line-no">336</span><span id="line-336"> int keyLength = ByteBuff.readCompressedInt(block);</span> |
| <span class="source-line-no">337</span><span id="line-337"> // TODO : See if we can avoid these reads as the read values are not getting used</span> |
| <span class="source-line-no">338</span><span id="line-338"> ByteBuff.readCompressedInt(block); // valueLength</span> |
| <span class="source-line-no">339</span><span id="line-339"> ByteBuff.readCompressedInt(block); // commonLength</span> |
| <span class="source-line-no">340</span><span id="line-340"> ByteBuffer key = block.asSubByteBuffer(keyLength).duplicate();</span> |
| <span class="source-line-no">341</span><span id="line-341"> block.reset();</span> |
| <span class="source-line-no">342</span><span id="line-342"> return createFirstKeyCell(key, keyLength);</span> |
| <span class="source-line-no">343</span><span id="line-343"> }</span> |
| <span class="source-line-no">344</span><span id="line-344"></span> |
| <span class="source-line-no">345</span><span id="line-345"> @Override</span> |
| <span class="source-line-no">346</span><span id="line-346"> public String toString() {</span> |
| <span class="source-line-no">347</span><span id="line-347"> return FastDiffDeltaEncoder.class.getSimpleName();</span> |
| <span class="source-line-no">348</span><span id="line-348"> }</span> |
| <span class="source-line-no">349</span><span id="line-349"></span> |
| <span class="source-line-no">350</span><span id="line-350"> protected static class FastDiffSeekerState extends SeekerState {</span> |
| <span class="source-line-no">351</span><span id="line-351"> private byte[] prevTimestampAndType = new byte[KeyValue.TIMESTAMP_TYPE_SIZE];</span> |
| <span class="source-line-no">352</span><span id="line-352"> private int rowLengthWithSize;</span> |
| <span class="source-line-no">353</span><span id="line-353"> private int familyLengthWithSize;</span> |
| <span class="source-line-no">354</span><span id="line-354"></span> |
| <span class="source-line-no">355</span><span id="line-355"> public FastDiffSeekerState(ObjectIntPair<ByteBuffer> tmpPair, boolean includeTags) {</span> |
| <span class="source-line-no">356</span><span id="line-356"> super(tmpPair, includeTags);</span> |
| <span class="source-line-no">357</span><span id="line-357"> }</span> |
| <span class="source-line-no">358</span><span id="line-358"></span> |
| <span class="source-line-no">359</span><span id="line-359"> @Override</span> |
| <span class="source-line-no">360</span><span id="line-360"> protected void copyFromNext(SeekerState that) {</span> |
| <span class="source-line-no">361</span><span id="line-361"> super.copyFromNext(that);</span> |
| <span class="source-line-no">362</span><span id="line-362"> FastDiffSeekerState other = (FastDiffSeekerState) that;</span> |
| <span class="source-line-no">363</span><span id="line-363"> System.arraycopy(other.prevTimestampAndType, 0, prevTimestampAndType, 0,</span> |
| <span class="source-line-no">364</span><span id="line-364"> KeyValue.TIMESTAMP_TYPE_SIZE);</span> |
| <span class="source-line-no">365</span><span id="line-365"> rowLengthWithSize = other.rowLengthWithSize;</span> |
| <span class="source-line-no">366</span><span id="line-366"> familyLengthWithSize = other.familyLengthWithSize;</span> |
| <span class="source-line-no">367</span><span id="line-367"> }</span> |
| <span class="source-line-no">368</span><span id="line-368"> }</span> |
| <span class="source-line-no">369</span><span id="line-369"></span> |
| <span class="source-line-no">370</span><span id="line-370"> @Override</span> |
| <span class="source-line-no">371</span><span id="line-371"> public EncodedSeeker createSeeker(final HFileBlockDecodingContext decodingCtx) {</span> |
| <span class="source-line-no">372</span><span id="line-372"> return new FastDiffSeekerStateBufferedEncodedSeeker(decodingCtx);</span> |
| <span class="source-line-no">373</span><span id="line-373"> }</span> |
| <span class="source-line-no">374</span><span id="line-374"></span> |
| <span class="source-line-no">375</span><span id="line-375"> private static class FastDiffSeekerStateBufferedEncodedSeeker</span> |
| <span class="source-line-no">376</span><span id="line-376"> extends BufferedEncodedSeeker<FastDiffSeekerState> {</span> |
| <span class="source-line-no">377</span><span id="line-377"></span> |
| <span class="source-line-no">378</span><span id="line-378"> private FastDiffSeekerStateBufferedEncodedSeeker(HFileBlockDecodingContext decodingCtx) {</span> |
| <span class="source-line-no">379</span><span id="line-379"> super(decodingCtx);</span> |
| <span class="source-line-no">380</span><span id="line-380"> }</span> |
| <span class="source-line-no">381</span><span id="line-381"></span> |
| <span class="source-line-no">382</span><span id="line-382"> private void decode(boolean isFirst) {</span> |
| <span class="source-line-no">383</span><span id="line-383"> byte flag = currentBuffer.get();</span> |
| <span class="source-line-no">384</span><span id="line-384"> if ((flag & FLAG_SAME_KEY_LENGTH) == 0) {</span> |
| <span class="source-line-no">385</span><span id="line-385"> if (!isFirst) {</span> |
| <span class="source-line-no">386</span><span id="line-386"> System.arraycopy(current.keyBuffer,</span> |
| <span class="source-line-no">387</span><span id="line-387"> current.keyLength - current.prevTimestampAndType.length, current.prevTimestampAndType,</span> |
| <span class="source-line-no">388</span><span id="line-388"> 0, current.prevTimestampAndType.length);</span> |
| <span class="source-line-no">389</span><span id="line-389"> }</span> |
| <span class="source-line-no">390</span><span id="line-390"> current.keyLength = ByteBuff.readCompressedInt(currentBuffer);</span> |
| <span class="source-line-no">391</span><span id="line-391"> }</span> |
| <span class="source-line-no">392</span><span id="line-392"> if ((flag & FLAG_SAME_VALUE_LENGTH) == 0) {</span> |
| <span class="source-line-no">393</span><span id="line-393"> current.valueLength = ByteBuff.readCompressedInt(currentBuffer);</span> |
| <span class="source-line-no">394</span><span id="line-394"> }</span> |
| <span class="source-line-no">395</span><span id="line-395"> current.lastCommonPrefix = ByteBuff.readCompressedInt(currentBuffer);</span> |
| <span class="source-line-no">396</span><span id="line-396"></span> |
| <span class="source-line-no">397</span><span id="line-397"> current.ensureSpaceForKey();</span> |
| <span class="source-line-no">398</span><span id="line-398"></span> |
| <span class="source-line-no">399</span><span id="line-399"> if (isFirst) {</span> |
| <span class="source-line-no">400</span><span id="line-400"> // copy everything</span> |
| <span class="source-line-no">401</span><span id="line-401"> currentBuffer.get(current.keyBuffer, current.lastCommonPrefix,</span> |
| <span class="source-line-no">402</span><span id="line-402"> current.keyLength - current.prevTimestampAndType.length);</span> |
| <span class="source-line-no">403</span><span id="line-403"> current.rowLengthWithSize = Bytes.toShort(current.keyBuffer, 0) + Bytes.SIZEOF_SHORT;</span> |
| <span class="source-line-no">404</span><span id="line-404"> current.familyLengthWithSize =</span> |
| <span class="source-line-no">405</span><span id="line-405"> current.keyBuffer[current.rowLengthWithSize] + Bytes.SIZEOF_BYTE;</span> |
| <span class="source-line-no">406</span><span id="line-406"> } else if (current.lastCommonPrefix < Bytes.SIZEOF_SHORT) {</span> |
| <span class="source-line-no">407</span><span id="line-407"> // length of row is different, copy everything except family</span> |
| <span class="source-line-no">408</span><span id="line-408"></span> |
| <span class="source-line-no">409</span><span id="line-409"> // copy the row size</span> |
| <span class="source-line-no">410</span><span id="line-410"> int oldRowLengthWithSize = current.rowLengthWithSize;</span> |
| <span class="source-line-no">411</span><span id="line-411"> currentBuffer.get(current.keyBuffer, current.lastCommonPrefix,</span> |
| <span class="source-line-no">412</span><span id="line-412"> Bytes.SIZEOF_SHORT - current.lastCommonPrefix);</span> |
| <span class="source-line-no">413</span><span id="line-413"> current.rowLengthWithSize = Bytes.toShort(current.keyBuffer, 0) + Bytes.SIZEOF_SHORT;</span> |
| <span class="source-line-no">414</span><span id="line-414"></span> |
| <span class="source-line-no">415</span><span id="line-415"> // move the column family</span> |
| <span class="source-line-no">416</span><span id="line-416"> System.arraycopy(current.keyBuffer, oldRowLengthWithSize, current.keyBuffer,</span> |
| <span class="source-line-no">417</span><span id="line-417"> current.rowLengthWithSize, current.familyLengthWithSize);</span> |
| <span class="source-line-no">418</span><span id="line-418"></span> |
| <span class="source-line-no">419</span><span id="line-419"> // copy the rest of row</span> |
| <span class="source-line-no">420</span><span id="line-420"> currentBuffer.get(current.keyBuffer, Bytes.SIZEOF_SHORT,</span> |
| <span class="source-line-no">421</span><span id="line-421"> current.rowLengthWithSize - Bytes.SIZEOF_SHORT);</span> |
| <span class="source-line-no">422</span><span id="line-422"></span> |
| <span class="source-line-no">423</span><span id="line-423"> // copy the qualifier</span> |
| <span class="source-line-no">424</span><span id="line-424"> currentBuffer.get(current.keyBuffer,</span> |
| <span class="source-line-no">425</span><span id="line-425"> current.rowLengthWithSize + current.familyLengthWithSize,</span> |
| <span class="source-line-no">426</span><span id="line-426"> current.keyLength - current.rowLengthWithSize - current.familyLengthWithSize</span> |
| <span class="source-line-no">427</span><span id="line-427"> - current.prevTimestampAndType.length);</span> |
| <span class="source-line-no">428</span><span id="line-428"> } else if (current.lastCommonPrefix < current.rowLengthWithSize) {</span> |
| <span class="source-line-no">429</span><span id="line-429"> // We have to copy part of row and qualifier, but the column family</span> |
| <span class="source-line-no">430</span><span id="line-430"> // is in the right place.</span> |
| <span class="source-line-no">431</span><span id="line-431"></span> |
| <span class="source-line-no">432</span><span id="line-432"> // before column family (rest of row)</span> |
| <span class="source-line-no">433</span><span id="line-433"> currentBuffer.get(current.keyBuffer, current.lastCommonPrefix,</span> |
| <span class="source-line-no">434</span><span id="line-434"> current.rowLengthWithSize - current.lastCommonPrefix);</span> |
| <span class="source-line-no">435</span><span id="line-435"></span> |
| <span class="source-line-no">436</span><span id="line-436"> // after column family (qualifier)</span> |
| <span class="source-line-no">437</span><span id="line-437"> currentBuffer.get(current.keyBuffer,</span> |
| <span class="source-line-no">438</span><span id="line-438"> current.rowLengthWithSize + current.familyLengthWithSize,</span> |
| <span class="source-line-no">439</span><span id="line-439"> current.keyLength - current.rowLengthWithSize - current.familyLengthWithSize</span> |
| <span class="source-line-no">440</span><span id="line-440"> - current.prevTimestampAndType.length);</span> |
| <span class="source-line-no">441</span><span id="line-441"> } else {</span> |
| <span class="source-line-no">442</span><span id="line-442"> // copy just the ending</span> |
| <span class="source-line-no">443</span><span id="line-443"> currentBuffer.get(current.keyBuffer, current.lastCommonPrefix,</span> |
| <span class="source-line-no">444</span><span id="line-444"> current.keyLength - current.prevTimestampAndType.length - current.lastCommonPrefix);</span> |
| <span class="source-line-no">445</span><span id="line-445"> }</span> |
| <span class="source-line-no">446</span><span id="line-446"></span> |
| <span class="source-line-no">447</span><span id="line-447"> // timestamp</span> |
| <span class="source-line-no">448</span><span id="line-448"> int pos = current.keyLength - current.prevTimestampAndType.length;</span> |
| <span class="source-line-no">449</span><span id="line-449"> int commonTimestampPrefix = (flag & MASK_TIMESTAMP_LENGTH) >>> SHIFT_TIMESTAMP_LENGTH;</span> |
| <span class="source-line-no">450</span><span id="line-450"> if ((flag & FLAG_SAME_KEY_LENGTH) == 0) {</span> |
| <span class="source-line-no">451</span><span id="line-451"> System.arraycopy(current.prevTimestampAndType, 0, current.keyBuffer, pos,</span> |
| <span class="source-line-no">452</span><span id="line-452"> commonTimestampPrefix);</span> |
| <span class="source-line-no">453</span><span id="line-453"> }</span> |
| <span class="source-line-no">454</span><span id="line-454"> pos += commonTimestampPrefix;</span> |
| <span class="source-line-no">455</span><span id="line-455"> currentBuffer.get(current.keyBuffer, pos, Bytes.SIZEOF_LONG - commonTimestampPrefix);</span> |
| <span class="source-line-no">456</span><span id="line-456"> pos += Bytes.SIZEOF_LONG - commonTimestampPrefix;</span> |
| <span class="source-line-no">457</span><span id="line-457"></span> |
| <span class="source-line-no">458</span><span id="line-458"> // type</span> |
| <span class="source-line-no">459</span><span id="line-459"> if ((flag & FLAG_SAME_TYPE) == 0) {</span> |
| <span class="source-line-no">460</span><span id="line-460"> currentBuffer.get(current.keyBuffer, pos, Bytes.SIZEOF_BYTE);</span> |
| <span class="source-line-no">461</span><span id="line-461"> } else if ((flag & FLAG_SAME_KEY_LENGTH) == 0) {</span> |
| <span class="source-line-no">462</span><span id="line-462"> current.keyBuffer[pos] = current.prevTimestampAndType[Bytes.SIZEOF_LONG];</span> |
| <span class="source-line-no">463</span><span id="line-463"> }</span> |
| <span class="source-line-no">464</span><span id="line-464"></span> |
| <span class="source-line-no">465</span><span id="line-465"> // handle value</span> |
| <span class="source-line-no">466</span><span id="line-466"> if ((flag & FLAG_SAME_VALUE) == 0) {</span> |
| <span class="source-line-no">467</span><span id="line-467"> current.valueOffset = currentBuffer.position();</span> |
| <span class="source-line-no">468</span><span id="line-468"> currentBuffer.skip(current.valueLength);</span> |
| <span class="source-line-no">469</span><span id="line-469"> }</span> |
| <span class="source-line-no">470</span><span id="line-470"></span> |
| <span class="source-line-no">471</span><span id="line-471"> if (includesTags()) {</span> |
| <span class="source-line-no">472</span><span id="line-472"> decodeTags();</span> |
| <span class="source-line-no">473</span><span id="line-473"> }</span> |
| <span class="source-line-no">474</span><span id="line-474"> if (includesMvcc()) {</span> |
| <span class="source-line-no">475</span><span id="line-475"> current.memstoreTS = ByteBufferUtils.readVLong(currentBuffer);</span> |
| <span class="source-line-no">476</span><span id="line-476"> } else {</span> |
| <span class="source-line-no">477</span><span id="line-477"> current.memstoreTS = 0;</span> |
| <span class="source-line-no">478</span><span id="line-478"> }</span> |
| <span class="source-line-no">479</span><span id="line-479"> current.nextKvOffset = currentBuffer.position();</span> |
| <span class="source-line-no">480</span><span id="line-480"> }</span> |
| <span class="source-line-no">481</span><span id="line-481"></span> |
| <span class="source-line-no">482</span><span id="line-482"> @Override</span> |
| <span class="source-line-no">483</span><span id="line-483"> protected void decodeFirst() {</span> |
| <span class="source-line-no">484</span><span id="line-484"> currentBuffer.skip(Bytes.SIZEOF_INT);</span> |
| <span class="source-line-no">485</span><span id="line-485"> decode(true);</span> |
| <span class="source-line-no">486</span><span id="line-486"> }</span> |
| <span class="source-line-no">487</span><span id="line-487"></span> |
| <span class="source-line-no">488</span><span id="line-488"> @Override</span> |
| <span class="source-line-no">489</span><span id="line-489"> protected void decodeNext() {</span> |
| <span class="source-line-no">490</span><span id="line-490"> decode(false);</span> |
| <span class="source-line-no">491</span><span id="line-491"> }</span> |
| <span class="source-line-no">492</span><span id="line-492"></span> |
| <span class="source-line-no">493</span><span id="line-493"> @Override</span> |
| <span class="source-line-no">494</span><span id="line-494"> protected FastDiffSeekerState createSeekerState() {</span> |
| <span class="source-line-no">495</span><span id="line-495"> return new FastDiffSeekerState(this.tmpPair, this.includesTags());</span> |
| <span class="source-line-no">496</span><span id="line-496"> }</span> |
| <span class="source-line-no">497</span><span id="line-497"> }</span> |
| <span class="source-line-no">498</span><span id="line-498">}</span> |
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| </pre> |
| </div> |
| </main> |
| </body> |
| </html> |
