| <!DOCTYPE HTML> |
| <html lang="en"> |
| <head> |
| <!-- Generated by javadoc (17) --> |
| <title>Source code</title> |
| <meta name="viewport" content="width=device-width, initial-scale=1"> |
| <meta name="description" content="source: package: org.apache.hadoop.hbase.io.encoding, class: RowIndexSeekerV1"> |
| <meta name="generator" content="javadoc/SourceToHTMLConverter"> |
| <link rel="stylesheet" type="text/css" href="../../../../../../../stylesheet.css" title="Style"> |
| </head> |
| <body class="source-page"> |
| <main role="main"> |
| <div class="source-container"> |
| <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.nio.ByteBuffer;</span> |
| <span class="source-line-no">021</span><span id="line-21">import org.apache.hadoop.hbase.ByteBufferKeyOnlyKeyValue;</span> |
| <span class="source-line-no">022</span><span id="line-22">import org.apache.hadoop.hbase.Cell;</span> |
| <span class="source-line-no">023</span><span id="line-23">import org.apache.hadoop.hbase.CellComparator;</span> |
| <span class="source-line-no">024</span><span id="line-24">import org.apache.hadoop.hbase.CellUtil;</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.HConstants;</span> |
| <span class="source-line-no">027</span><span id="line-27">import org.apache.hadoop.hbase.KeyValue;</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.SizeCachedByteBufferKeyValue;</span> |
| <span class="source-line-no">030</span><span id="line-30">import org.apache.hadoop.hbase.SizeCachedKeyValue;</span> |
| <span class="source-line-no">031</span><span id="line-31">import org.apache.hadoop.hbase.SizeCachedNoTagsByteBufferKeyValue;</span> |
| <span class="source-line-no">032</span><span id="line-32">import org.apache.hadoop.hbase.SizeCachedNoTagsKeyValue;</span> |
| <span class="source-line-no">033</span><span id="line-33">import org.apache.hadoop.hbase.io.encoding.AbstractDataBlockEncoder.AbstractEncodedSeeker;</span> |
| <span class="source-line-no">034</span><span id="line-34">import org.apache.hadoop.hbase.nio.ByteBuff;</span> |
| <span class="source-line-no">035</span><span id="line-35">import org.apache.hadoop.hbase.util.ByteBufferUtils;</span> |
| <span class="source-line-no">036</span><span id="line-36">import org.apache.hadoop.hbase.util.Bytes;</span> |
| <span class="source-line-no">037</span><span id="line-37">import org.apache.hadoop.hbase.util.ObjectIntPair;</span> |
| <span class="source-line-no">038</span><span id="line-38">import org.apache.yetus.audience.InterfaceAudience;</span> |
| <span class="source-line-no">039</span><span id="line-39"></span> |
| <span class="source-line-no">040</span><span id="line-40">@InterfaceAudience.Private</span> |
| <span class="source-line-no">041</span><span id="line-41">public class RowIndexSeekerV1 extends AbstractEncodedSeeker {</span> |
| <span class="source-line-no">042</span><span id="line-42"></span> |
| <span class="source-line-no">043</span><span id="line-43"> // A temp pair object which will be reused by ByteBuff#asSubByteBuffer calls. This avoids too</span> |
| <span class="source-line-no">044</span><span id="line-44"> // many object creations.</span> |
| <span class="source-line-no">045</span><span id="line-45"> protected final ObjectIntPair<ByteBuffer> tmpPair = new ObjectIntPair<>();</span> |
| <span class="source-line-no">046</span><span id="line-46"></span> |
| <span class="source-line-no">047</span><span id="line-47"> private ByteBuff currentBuffer;</span> |
| <span class="source-line-no">048</span><span id="line-48"> private SeekerState current = new SeekerState(); // always valid</span> |
| <span class="source-line-no">049</span><span id="line-49"> private SeekerState previous = new SeekerState(); // may not be valid</span> |
| <span class="source-line-no">050</span><span id="line-50"></span> |
| <span class="source-line-no">051</span><span id="line-51"> private int rowNumber;</span> |
| <span class="source-line-no">052</span><span id="line-52"> private ByteBuff rowOffsets = null;</span> |
| <span class="source-line-no">053</span><span id="line-53"> private final CellComparator cellComparator;</span> |
| <span class="source-line-no">054</span><span id="line-54"></span> |
| <span class="source-line-no">055</span><span id="line-55"> public RowIndexSeekerV1(HFileBlockDecodingContext decodingCtx) {</span> |
| <span class="source-line-no">056</span><span id="line-56"> super(decodingCtx);</span> |
| <span class="source-line-no">057</span><span id="line-57"> this.cellComparator = decodingCtx.getHFileContext().getCellComparator();</span> |
| <span class="source-line-no">058</span><span id="line-58"> }</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"> public void setCurrentBuffer(ByteBuff buffer) {</span> |
| <span class="source-line-no">062</span><span id="line-62"> int onDiskSize = buffer.getInt(buffer.limit() - Bytes.SIZEOF_INT);</span> |
| <span class="source-line-no">063</span><span id="line-63"></span> |
| <span class="source-line-no">064</span><span id="line-64"> // Data part</span> |
| <span class="source-line-no">065</span><span id="line-65"> ByteBuff dup = buffer.duplicate();</span> |
| <span class="source-line-no">066</span><span id="line-66"> dup.position(buffer.position());</span> |
| <span class="source-line-no">067</span><span id="line-67"> dup.limit(buffer.position() + onDiskSize);</span> |
| <span class="source-line-no">068</span><span id="line-68"> currentBuffer = dup.slice();</span> |
| <span class="source-line-no">069</span><span id="line-69"> current.currentBuffer = currentBuffer;</span> |
| <span class="source-line-no">070</span><span id="line-70"> buffer.skip(onDiskSize);</span> |
| <span class="source-line-no">071</span><span id="line-71"></span> |
| <span class="source-line-no">072</span><span id="line-72"> // Row offset</span> |
| <span class="source-line-no">073</span><span id="line-73"> rowNumber = buffer.getInt();</span> |
| <span class="source-line-no">074</span><span id="line-74"> int totalRowOffsetsLength = Bytes.SIZEOF_INT * rowNumber;</span> |
| <span class="source-line-no">075</span><span id="line-75"> ByteBuff rowDup = buffer.duplicate();</span> |
| <span class="source-line-no">076</span><span id="line-76"> rowDup.position(buffer.position());</span> |
| <span class="source-line-no">077</span><span id="line-77"> rowDup.limit(buffer.position() + totalRowOffsetsLength);</span> |
| <span class="source-line-no">078</span><span id="line-78"> rowOffsets = rowDup.slice();</span> |
| <span class="source-line-no">079</span><span id="line-79"></span> |
| <span class="source-line-no">080</span><span id="line-80"> decodeFirst();</span> |
| <span class="source-line-no">081</span><span id="line-81"> }</span> |
| <span class="source-line-no">082</span><span id="line-82"></span> |
| <span class="source-line-no">083</span><span id="line-83"> @Override</span> |
| <span class="source-line-no">084</span><span id="line-84"> @SuppressWarnings("ByteBufferBackingArray")</span> |
| <span class="source-line-no">085</span><span id="line-85"> public ExtendedCell getKey() {</span> |
| <span class="source-line-no">086</span><span id="line-86"> if (current.keyBuffer.hasArray()) {</span> |
| <span class="source-line-no">087</span><span id="line-87"> return new KeyValue.KeyOnlyKeyValue(current.keyBuffer.array(),</span> |
| <span class="source-line-no">088</span><span id="line-88"> current.keyBuffer.arrayOffset() + current.keyBuffer.position(), current.keyLength);</span> |
| <span class="source-line-no">089</span><span id="line-89"> } else {</span> |
| <span class="source-line-no">090</span><span id="line-90"> final byte[] key = new byte[current.keyLength];</span> |
| <span class="source-line-no">091</span><span id="line-91"> ByteBufferUtils.copyFromBufferToArray(key, current.keyBuffer, current.keyBuffer.position(), 0,</span> |
| <span class="source-line-no">092</span><span id="line-92"> current.keyLength);</span> |
| <span class="source-line-no">093</span><span id="line-93"> return new KeyValue.KeyOnlyKeyValue(key, 0, current.keyLength);</span> |
| <span class="source-line-no">094</span><span id="line-94"> }</span> |
| <span class="source-line-no">095</span><span id="line-95"> }</span> |
| <span class="source-line-no">096</span><span id="line-96"></span> |
| <span class="source-line-no">097</span><span id="line-97"> @Override</span> |
| <span class="source-line-no">098</span><span id="line-98"> public ByteBuffer getValueShallowCopy() {</span> |
| <span class="source-line-no">099</span><span id="line-99"> currentBuffer.asSubByteBuffer(current.valueOffset, current.valueLength, tmpPair);</span> |
| <span class="source-line-no">100</span><span id="line-100"> ByteBuffer dup = tmpPair.getFirst().duplicate();</span> |
| <span class="source-line-no">101</span><span id="line-101"> dup.position(tmpPair.getSecond());</span> |
| <span class="source-line-no">102</span><span id="line-102"> dup.limit(tmpPair.getSecond() + current.valueLength);</span> |
| <span class="source-line-no">103</span><span id="line-103"> return dup.slice();</span> |
| <span class="source-line-no">104</span><span id="line-104"> }</span> |
| <span class="source-line-no">105</span><span id="line-105"></span> |
| <span class="source-line-no">106</span><span id="line-106"> @Override</span> |
| <span class="source-line-no">107</span><span id="line-107"> public ExtendedCell getCell() {</span> |
| <span class="source-line-no">108</span><span id="line-108"> return current.toCell();</span> |
| <span class="source-line-no">109</span><span id="line-109"> }</span> |
| <span class="source-line-no">110</span><span id="line-110"></span> |
| <span class="source-line-no">111</span><span id="line-111"> @Override</span> |
| <span class="source-line-no">112</span><span id="line-112"> public void rewind() {</span> |
| <span class="source-line-no">113</span><span id="line-113"> currentBuffer.rewind();</span> |
| <span class="source-line-no">114</span><span id="line-114"> decodeFirst();</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"> @Override</span> |
| <span class="source-line-no">118</span><span id="line-118"> public boolean next() {</span> |
| <span class="source-line-no">119</span><span id="line-119"> if (!currentBuffer.hasRemaining()) {</span> |
| <span class="source-line-no">120</span><span id="line-120"> return false;</span> |
| <span class="source-line-no">121</span><span id="line-121"> }</span> |
| <span class="source-line-no">122</span><span id="line-122"> decodeNext();</span> |
| <span class="source-line-no">123</span><span id="line-123"> previous.invalidate();</span> |
| <span class="source-line-no">124</span><span id="line-124"> return true;</span> |
| <span class="source-line-no">125</span><span id="line-125"> }</span> |
| <span class="source-line-no">126</span><span id="line-126"></span> |
| <span class="source-line-no">127</span><span id="line-127"> private int binarySearch(Cell seekCell, boolean seekBefore) {</span> |
| <span class="source-line-no">128</span><span id="line-128"> int low = 0;</span> |
| <span class="source-line-no">129</span><span id="line-129"> int high = rowNumber - 1;</span> |
| <span class="source-line-no">130</span><span id="line-130"> int mid = low + ((high - low) >> 1);</span> |
| <span class="source-line-no">131</span><span id="line-131"> int comp = 0;</span> |
| <span class="source-line-no">132</span><span id="line-132"> while (low <= high) {</span> |
| <span class="source-line-no">133</span><span id="line-133"> mid = low + ((high - low) >> 1);</span> |
| <span class="source-line-no">134</span><span id="line-134"> comp = this.cellComparator.compareRows(getRow(mid), seekCell);</span> |
| <span class="source-line-no">135</span><span id="line-135"> if (comp < 0) {</span> |
| <span class="source-line-no">136</span><span id="line-136"> low = mid + 1;</span> |
| <span class="source-line-no">137</span><span id="line-137"> } else if (comp > 0) {</span> |
| <span class="source-line-no">138</span><span id="line-138"> high = mid - 1;</span> |
| <span class="source-line-no">139</span><span id="line-139"> } else {</span> |
| <span class="source-line-no">140</span><span id="line-140"> // key found</span> |
| <span class="source-line-no">141</span><span id="line-141"> if (seekBefore) {</span> |
| <span class="source-line-no">142</span><span id="line-142"> return mid - 1;</span> |
| <span class="source-line-no">143</span><span id="line-143"> } else {</span> |
| <span class="source-line-no">144</span><span id="line-144"> return mid;</span> |
| <span class="source-line-no">145</span><span id="line-145"> }</span> |
| <span class="source-line-no">146</span><span id="line-146"> }</span> |
| <span class="source-line-no">147</span><span id="line-147"> }</span> |
| <span class="source-line-no">148</span><span id="line-148"> // key not found.</span> |
| <span class="source-line-no">149</span><span id="line-149"> if (comp > 0) {</span> |
| <span class="source-line-no">150</span><span id="line-150"> return mid - 1;</span> |
| <span class="source-line-no">151</span><span id="line-151"> } else {</span> |
| <span class="source-line-no">152</span><span id="line-152"> return mid;</span> |
| <span class="source-line-no">153</span><span id="line-153"> }</span> |
| <span class="source-line-no">154</span><span id="line-154"> }</span> |
| <span class="source-line-no">155</span><span id="line-155"></span> |
| <span class="source-line-no">156</span><span id="line-156"> private ByteBuffer getRow(int index) {</span> |
| <span class="source-line-no">157</span><span id="line-157"> int offset = rowOffsets.getIntAfterPosition(index * Bytes.SIZEOF_INT);</span> |
| <span class="source-line-no">158</span><span id="line-158"> ByteBuff block = currentBuffer.duplicate();</span> |
| <span class="source-line-no">159</span><span id="line-159"> block.position(offset + Bytes.SIZEOF_LONG);</span> |
| <span class="source-line-no">160</span><span id="line-160"> short rowLen = block.getShort();</span> |
| <span class="source-line-no">161</span><span id="line-161"> block.asSubByteBuffer(block.position(), rowLen, tmpPair);</span> |
| <span class="source-line-no">162</span><span id="line-162"> ByteBuffer row = tmpPair.getFirst();</span> |
| <span class="source-line-no">163</span><span id="line-163"> row.position(tmpPair.getSecond()).limit(tmpPair.getSecond() + rowLen);</span> |
| <span class="source-line-no">164</span><span id="line-164"> return row;</span> |
| <span class="source-line-no">165</span><span id="line-165"> }</span> |
| <span class="source-line-no">166</span><span id="line-166"></span> |
| <span class="source-line-no">167</span><span id="line-167"> @Override</span> |
| <span class="source-line-no">168</span><span id="line-168"> public int seekToKeyInBlock(ExtendedCell seekCell, boolean seekBefore) {</span> |
| <span class="source-line-no">169</span><span id="line-169"> previous.invalidate();</span> |
| <span class="source-line-no">170</span><span id="line-170"> int index = binarySearch(seekCell, seekBefore);</span> |
| <span class="source-line-no">171</span><span id="line-171"> if (index < 0) {</span> |
| <span class="source-line-no">172</span><span id="line-172"> return HConstants.INDEX_KEY_MAGIC; // using optimized index key</span> |
| <span class="source-line-no">173</span><span id="line-173"> } else {</span> |
| <span class="source-line-no">174</span><span id="line-174"> int offset = rowOffsets.getIntAfterPosition(index * Bytes.SIZEOF_INT);</span> |
| <span class="source-line-no">175</span><span id="line-175"> if (offset != 0) {</span> |
| <span class="source-line-no">176</span><span id="line-176"> decodeAtPosition(offset);</span> |
| <span class="source-line-no">177</span><span id="line-177"> }</span> |
| <span class="source-line-no">178</span><span id="line-178"> }</span> |
| <span class="source-line-no">179</span><span id="line-179"> do {</span> |
| <span class="source-line-no">180</span><span id="line-180"> int comp =</span> |
| <span class="source-line-no">181</span><span id="line-181"> PrivateCellUtil.compareKeyIgnoresMvcc(this.cellComparator, seekCell, current.currentKey);</span> |
| <span class="source-line-no">182</span><span id="line-182"> if (comp == 0) { // exact match</span> |
| <span class="source-line-no">183</span><span id="line-183"> if (seekBefore) {</span> |
| <span class="source-line-no">184</span><span id="line-184"> if (!previous.isValid()) {</span> |
| <span class="source-line-no">185</span><span id="line-185"> // The caller (seekBefore) has to ensure that we are not at the</span> |
| <span class="source-line-no">186</span><span id="line-186"> // first key in the block.</span> |
| <span class="source-line-no">187</span><span id="line-187"> throw new IllegalStateException(</span> |
| <span class="source-line-no">188</span><span id="line-188"> "Cannot seekBefore if " + "positioned at the first key in the block: key="</span> |
| <span class="source-line-no">189</span><span id="line-189"> + Bytes.toStringBinary(seekCell.getRowArray()));</span> |
| <span class="source-line-no">190</span><span id="line-190"> }</span> |
| <span class="source-line-no">191</span><span id="line-191"> moveToPrevious();</span> |
| <span class="source-line-no">192</span><span id="line-192"> return 1;</span> |
| <span class="source-line-no">193</span><span id="line-193"> }</span> |
| <span class="source-line-no">194</span><span id="line-194"> return 0;</span> |
| <span class="source-line-no">195</span><span id="line-195"> }</span> |
| <span class="source-line-no">196</span><span id="line-196"></span> |
| <span class="source-line-no">197</span><span id="line-197"> if (comp < 0) { // already too large, check previous</span> |
| <span class="source-line-no">198</span><span id="line-198"> if (previous.isValid()) {</span> |
| <span class="source-line-no">199</span><span id="line-199"> moveToPrevious();</span> |
| <span class="source-line-no">200</span><span id="line-200"> } else {</span> |
| <span class="source-line-no">201</span><span id="line-201"> return HConstants.INDEX_KEY_MAGIC; // using optimized index key</span> |
| <span class="source-line-no">202</span><span id="line-202"> }</span> |
| <span class="source-line-no">203</span><span id="line-203"> return 1;</span> |
| <span class="source-line-no">204</span><span id="line-204"> }</span> |
| <span class="source-line-no">205</span><span id="line-205"></span> |
| <span class="source-line-no">206</span><span id="line-206"> // move to next, if more data is available</span> |
| <span class="source-line-no">207</span><span id="line-207"> if (currentBuffer.hasRemaining()) {</span> |
| <span class="source-line-no">208</span><span id="line-208"> previous.copyFromNext(current);</span> |
| <span class="source-line-no">209</span><span id="line-209"> decodeNext();</span> |
| <span class="source-line-no">210</span><span id="line-210"> } else {</span> |
| <span class="source-line-no">211</span><span id="line-211"> break;</span> |
| <span class="source-line-no">212</span><span id="line-212"> }</span> |
| <span class="source-line-no">213</span><span id="line-213"> } while (true);</span> |
| <span class="source-line-no">214</span><span id="line-214"></span> |
| <span class="source-line-no">215</span><span id="line-215"> // we hit the end of the block, not an exact match</span> |
| <span class="source-line-no">216</span><span id="line-216"> return 1;</span> |
| <span class="source-line-no">217</span><span id="line-217"> }</span> |
| <span class="source-line-no">218</span><span id="line-218"></span> |
| <span class="source-line-no">219</span><span id="line-219"> private void moveToPrevious() {</span> |
| <span class="source-line-no">220</span><span id="line-220"> if (!previous.isValid()) {</span> |
| <span class="source-line-no">221</span><span id="line-221"> throw new IllegalStateException("Can move back only once and not in first key in the block.");</span> |
| <span class="source-line-no">222</span><span id="line-222"> }</span> |
| <span class="source-line-no">223</span><span id="line-223"></span> |
| <span class="source-line-no">224</span><span id="line-224"> SeekerState tmp = previous;</span> |
| <span class="source-line-no">225</span><span id="line-225"> previous = current;</span> |
| <span class="source-line-no">226</span><span id="line-226"> current = tmp;</span> |
| <span class="source-line-no">227</span><span id="line-227"></span> |
| <span class="source-line-no">228</span><span id="line-228"> // move after last key value</span> |
| <span class="source-line-no">229</span><span id="line-229"> currentBuffer.position(current.nextKvOffset);</span> |
| <span class="source-line-no">230</span><span id="line-230"> previous.invalidate();</span> |
| <span class="source-line-no">231</span><span id="line-231"> }</span> |
| <span class="source-line-no">232</span><span id="line-232"></span> |
| <span class="source-line-no">233</span><span id="line-233"> @Override</span> |
| <span class="source-line-no">234</span><span id="line-234"> public int compareKey(CellComparator comparator, ExtendedCell key) {</span> |
| <span class="source-line-no">235</span><span id="line-235"> return PrivateCellUtil.compareKeyIgnoresMvcc(comparator, key, current.currentKey);</span> |
| <span class="source-line-no">236</span><span id="line-236"> }</span> |
| <span class="source-line-no">237</span><span id="line-237"></span> |
| <span class="source-line-no">238</span><span id="line-238"> protected void decodeFirst() {</span> |
| <span class="source-line-no">239</span><span id="line-239"> decodeNext();</span> |
| <span class="source-line-no">240</span><span id="line-240"> previous.invalidate();</span> |
| <span class="source-line-no">241</span><span id="line-241"> }</span> |
| <span class="source-line-no">242</span><span id="line-242"></span> |
| <span class="source-line-no">243</span><span id="line-243"> protected void decodeAtPosition(int position) {</span> |
| <span class="source-line-no">244</span><span id="line-244"> currentBuffer.position(position);</span> |
| <span class="source-line-no">245</span><span id="line-245"> decodeNext();</span> |
| <span class="source-line-no">246</span><span id="line-246"> previous.invalidate();</span> |
| <span class="source-line-no">247</span><span id="line-247"> }</span> |
| <span class="source-line-no">248</span><span id="line-248"></span> |
| <span class="source-line-no">249</span><span id="line-249"> protected void decodeNext() {</span> |
| <span class="source-line-no">250</span><span id="line-250"> current.startOffset = currentBuffer.position();</span> |
| <span class="source-line-no">251</span><span id="line-251"> long ll = currentBuffer.getLongAfterPosition(0);</span> |
| <span class="source-line-no">252</span><span id="line-252"> // Read top half as an int of key length and bottom int as value length</span> |
| <span class="source-line-no">253</span><span id="line-253"> current.keyLength = (int) (ll >> Integer.SIZE);</span> |
| <span class="source-line-no">254</span><span id="line-254"> current.valueLength = (int) (Bytes.MASK_FOR_LOWER_INT_IN_LONG ^ ll);</span> |
| <span class="source-line-no">255</span><span id="line-255"> currentBuffer.skip(Bytes.SIZEOF_LONG);</span> |
| <span class="source-line-no">256</span><span id="line-256"> // key part</span> |
| <span class="source-line-no">257</span><span id="line-257"> currentBuffer.asSubByteBuffer(currentBuffer.position(), current.keyLength, tmpPair);</span> |
| <span class="source-line-no">258</span><span id="line-258"> ByteBuffer key = tmpPair.getFirst().duplicate();</span> |
| <span class="source-line-no">259</span><span id="line-259"> key.position(tmpPair.getSecond()).limit(tmpPair.getSecond() + current.keyLength);</span> |
| <span class="source-line-no">260</span><span id="line-260"> current.keyBuffer = key;</span> |
| <span class="source-line-no">261</span><span id="line-261"> currentBuffer.skip(current.keyLength);</span> |
| <span class="source-line-no">262</span><span id="line-262"> // value part</span> |
| <span class="source-line-no">263</span><span id="line-263"> current.valueOffset = currentBuffer.position();</span> |
| <span class="source-line-no">264</span><span id="line-264"> currentBuffer.skip(current.valueLength);</span> |
| <span class="source-line-no">265</span><span id="line-265"> if (includesTags()) {</span> |
| <span class="source-line-no">266</span><span id="line-266"> decodeTags();</span> |
| <span class="source-line-no">267</span><span id="line-267"> }</span> |
| <span class="source-line-no">268</span><span id="line-268"> if (includesMvcc()) {</span> |
| <span class="source-line-no">269</span><span id="line-269"> current.memstoreTS = ByteBufferUtils.readVLong(currentBuffer);</span> |
| <span class="source-line-no">270</span><span id="line-270"> } else {</span> |
| <span class="source-line-no">271</span><span id="line-271"> current.memstoreTS = 0;</span> |
| <span class="source-line-no">272</span><span id="line-272"> }</span> |
| <span class="source-line-no">273</span><span id="line-273"> current.nextKvOffset = currentBuffer.position();</span> |
| <span class="source-line-no">274</span><span id="line-274"> current.currentKey.setKey(current.keyBuffer, tmpPair.getSecond(), current.keyLength);</span> |
| <span class="source-line-no">275</span><span id="line-275"> }</span> |
| <span class="source-line-no">276</span><span id="line-276"></span> |
| <span class="source-line-no">277</span><span id="line-277"> protected void decodeTags() {</span> |
| <span class="source-line-no">278</span><span id="line-278"> current.tagsLength = currentBuffer.getShortAfterPosition(0);</span> |
| <span class="source-line-no">279</span><span id="line-279"> currentBuffer.skip(Bytes.SIZEOF_SHORT);</span> |
| <span class="source-line-no">280</span><span id="line-280"> current.tagsOffset = currentBuffer.position();</span> |
| <span class="source-line-no">281</span><span id="line-281"> currentBuffer.skip(current.tagsLength);</span> |
| <span class="source-line-no">282</span><span id="line-282"> }</span> |
| <span class="source-line-no">283</span><span id="line-283"></span> |
| <span class="source-line-no">284</span><span id="line-284"> private class SeekerState {</span> |
| <span class="source-line-no">285</span><span id="line-285"> /**</span> |
| <span class="source-line-no">286</span><span id="line-286"> * The size of a (key length, value length) tuple that prefixes each entry in a data block.</span> |
| <span class="source-line-no">287</span><span id="line-287"> */</span> |
| <span class="source-line-no">288</span><span id="line-288"> public final static int KEY_VALUE_LEN_SIZE = 2 * Bytes.SIZEOF_INT;</span> |
| <span class="source-line-no">289</span><span id="line-289"></span> |
| <span class="source-line-no">290</span><span id="line-290"> protected ByteBuff currentBuffer;</span> |
| <span class="source-line-no">291</span><span id="line-291"> protected int startOffset = -1;</span> |
| <span class="source-line-no">292</span><span id="line-292"> protected int valueOffset = -1;</span> |
| <span class="source-line-no">293</span><span id="line-293"> protected int keyLength;</span> |
| <span class="source-line-no">294</span><span id="line-294"> protected int valueLength;</span> |
| <span class="source-line-no">295</span><span id="line-295"> protected int tagsLength = 0;</span> |
| <span class="source-line-no">296</span><span id="line-296"> protected int tagsOffset = -1;</span> |
| <span class="source-line-no">297</span><span id="line-297"></span> |
| <span class="source-line-no">298</span><span id="line-298"> protected ByteBuffer keyBuffer = null;</span> |
| <span class="source-line-no">299</span><span id="line-299"> protected long memstoreTS;</span> |
| <span class="source-line-no">300</span><span id="line-300"> protected int nextKvOffset;</span> |
| <span class="source-line-no">301</span><span id="line-301"> // buffer backed keyonlyKV</span> |
| <span class="source-line-no">302</span><span id="line-302"> private ByteBufferKeyOnlyKeyValue currentKey = new ByteBufferKeyOnlyKeyValue();</span> |
| <span class="source-line-no">303</span><span id="line-303"></span> |
| <span class="source-line-no">304</span><span id="line-304"> protected boolean isValid() {</span> |
| <span class="source-line-no">305</span><span id="line-305"> return valueOffset != -1;</span> |
| <span class="source-line-no">306</span><span id="line-306"> }</span> |
| <span class="source-line-no">307</span><span id="line-307"></span> |
| <span class="source-line-no">308</span><span id="line-308"> protected void invalidate() {</span> |
| <span class="source-line-no">309</span><span id="line-309"> valueOffset = -1;</span> |
| <span class="source-line-no">310</span><span id="line-310"> currentKey = new ByteBufferKeyOnlyKeyValue();</span> |
| <span class="source-line-no">311</span><span id="line-311"> currentBuffer = null;</span> |
| <span class="source-line-no">312</span><span id="line-312"> }</span> |
| <span class="source-line-no">313</span><span id="line-313"></span> |
| <span class="source-line-no">314</span><span id="line-314"> /**</span> |
| <span class="source-line-no">315</span><span id="line-315"> * Copy the state from the next one into this instance (the previous state placeholder). Used to</span> |
| <span class="source-line-no">316</span><span id="line-316"> * save the previous state when we are advancing the seeker to the next key/value.</span> |
| <span class="source-line-no">317</span><span id="line-317"> */</span> |
| <span class="source-line-no">318</span><span id="line-318"> protected void copyFromNext(SeekerState nextState) {</span> |
| <span class="source-line-no">319</span><span id="line-319"> keyBuffer = nextState.keyBuffer;</span> |
| <span class="source-line-no">320</span><span id="line-320"> currentKey.setKey(nextState.keyBuffer,</span> |
| <span class="source-line-no">321</span><span id="line-321"> nextState.currentKey.getRowPosition() - Bytes.SIZEOF_SHORT, nextState.keyLength);</span> |
| <span class="source-line-no">322</span><span id="line-322"></span> |
| <span class="source-line-no">323</span><span id="line-323"> startOffset = nextState.startOffset;</span> |
| <span class="source-line-no">324</span><span id="line-324"> valueOffset = nextState.valueOffset;</span> |
| <span class="source-line-no">325</span><span id="line-325"> keyLength = nextState.keyLength;</span> |
| <span class="source-line-no">326</span><span id="line-326"> valueLength = nextState.valueLength;</span> |
| <span class="source-line-no">327</span><span id="line-327"> nextKvOffset = nextState.nextKvOffset;</span> |
| <span class="source-line-no">328</span><span id="line-328"> memstoreTS = nextState.memstoreTS;</span> |
| <span class="source-line-no">329</span><span id="line-329"> currentBuffer = nextState.currentBuffer;</span> |
| <span class="source-line-no">330</span><span id="line-330"> tagsOffset = nextState.tagsOffset;</span> |
| <span class="source-line-no">331</span><span id="line-331"> tagsLength = nextState.tagsLength;</span> |
| <span class="source-line-no">332</span><span id="line-332"> }</span> |
| <span class="source-line-no">333</span><span id="line-333"></span> |
| <span class="source-line-no">334</span><span id="line-334"> @Override</span> |
| <span class="source-line-no">335</span><span id="line-335"> public String toString() {</span> |
| <span class="source-line-no">336</span><span id="line-336"> return CellUtil.getCellKeyAsString(toCell());</span> |
| <span class="source-line-no">337</span><span id="line-337"> }</span> |
| <span class="source-line-no">338</span><span id="line-338"></span> |
| <span class="source-line-no">339</span><span id="line-339"> protected int getCellBufSize() {</span> |
| <span class="source-line-no">340</span><span id="line-340"> int kvBufSize = KEY_VALUE_LEN_SIZE + keyLength + valueLength;</span> |
| <span class="source-line-no">341</span><span id="line-341"> if (includesTags() && tagsLength > 0) {</span> |
| <span class="source-line-no">342</span><span id="line-342"> kvBufSize += Bytes.SIZEOF_SHORT + tagsLength;</span> |
| <span class="source-line-no">343</span><span id="line-343"> }</span> |
| <span class="source-line-no">344</span><span id="line-344"> return kvBufSize;</span> |
| <span class="source-line-no">345</span><span id="line-345"> }</span> |
| <span class="source-line-no">346</span><span id="line-346"></span> |
| <span class="source-line-no">347</span><span id="line-347"> public ExtendedCell toCell() {</span> |
| <span class="source-line-no">348</span><span id="line-348"> ExtendedCell ret;</span> |
| <span class="source-line-no">349</span><span id="line-349"> int cellBufSize = getCellBufSize();</span> |
| <span class="source-line-no">350</span><span id="line-350"> long seqId = 0L;</span> |
| <span class="source-line-no">351</span><span id="line-351"> if (includesMvcc()) {</span> |
| <span class="source-line-no">352</span><span id="line-352"> seqId = memstoreTS;</span> |
| <span class="source-line-no">353</span><span id="line-353"> }</span> |
| <span class="source-line-no">354</span><span id="line-354"> if (currentBuffer.hasArray()) {</span> |
| <span class="source-line-no">355</span><span id="line-355"> // TODO : reduce the varieties of KV here. Check if based on a boolean</span> |
| <span class="source-line-no">356</span><span id="line-356"> // we can handle the 'no tags' case.</span> |
| <span class="source-line-no">357</span><span id="line-357"> if (tagsLength > 0) {</span> |
| <span class="source-line-no">358</span><span id="line-358"> // TODO : getRow len here.</span> |
| <span class="source-line-no">359</span><span id="line-359"> ret = new SizeCachedKeyValue(currentBuffer.array(),</span> |
| <span class="source-line-no">360</span><span id="line-360"> currentBuffer.arrayOffset() + startOffset, cellBufSize, seqId, keyLength);</span> |
| <span class="source-line-no">361</span><span id="line-361"> } else {</span> |
| <span class="source-line-no">362</span><span id="line-362"> ret = new SizeCachedNoTagsKeyValue(currentBuffer.array(),</span> |
| <span class="source-line-no">363</span><span id="line-363"> currentBuffer.arrayOffset() + startOffset, cellBufSize, seqId, keyLength);</span> |
| <span class="source-line-no">364</span><span id="line-364"> }</span> |
| <span class="source-line-no">365</span><span id="line-365"> } else {</span> |
| <span class="source-line-no">366</span><span id="line-366"> currentBuffer.asSubByteBuffer(startOffset, cellBufSize, tmpPair);</span> |
| <span class="source-line-no">367</span><span id="line-367"> ByteBuffer buf = tmpPair.getFirst();</span> |
| <span class="source-line-no">368</span><span id="line-368"> if (buf.isDirect()) {</span> |
| <span class="source-line-no">369</span><span id="line-369"> // TODO : getRow len here.</span> |
| <span class="source-line-no">370</span><span id="line-370"> ret = tagsLength > 0</span> |
| <span class="source-line-no">371</span><span id="line-371"> ? new SizeCachedByteBufferKeyValue(buf, tmpPair.getSecond(), cellBufSize, seqId,</span> |
| <span class="source-line-no">372</span><span id="line-372"> keyLength)</span> |
| <span class="source-line-no">373</span><span id="line-373"> : new SizeCachedNoTagsByteBufferKeyValue(buf, tmpPair.getSecond(), cellBufSize, seqId,</span> |
| <span class="source-line-no">374</span><span id="line-374"> keyLength);</span> |
| <span class="source-line-no">375</span><span id="line-375"> } else {</span> |
| <span class="source-line-no">376</span><span id="line-376"> if (tagsLength > 0) {</span> |
| <span class="source-line-no">377</span><span id="line-377"> ret = new SizeCachedKeyValue(buf.array(), buf.arrayOffset() + tmpPair.getSecond(),</span> |
| <span class="source-line-no">378</span><span id="line-378"> cellBufSize, seqId, keyLength);</span> |
| <span class="source-line-no">379</span><span id="line-379"> } else {</span> |
| <span class="source-line-no">380</span><span id="line-380"> ret = new SizeCachedNoTagsKeyValue(buf.array(), buf.arrayOffset() + tmpPair.getSecond(),</span> |
| <span class="source-line-no">381</span><span id="line-381"> cellBufSize, seqId, keyLength);</span> |
| <span class="source-line-no">382</span><span id="line-382"> }</span> |
| <span class="source-line-no">383</span><span id="line-383"> }</span> |
| <span class="source-line-no">384</span><span id="line-384"> }</span> |
| <span class="source-line-no">385</span><span id="line-385"> return ret;</span> |
| <span class="source-line-no">386</span><span id="line-386"> }</span> |
| <span class="source-line-no">387</span><span id="line-387"> }</span> |
| <span class="source-line-no">388</span><span id="line-388">}</span> |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| </pre> |
| </div> |
| </main> |
| </body> |
| </html> |
