| <!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.hfile, class: HFileReaderImpl, class: HFileScannerImpl"> |
| <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.hfile;</span> |
| <span class="source-line-no">019</span><span id="line-19"></span> |
| <span class="source-line-no">020</span><span id="line-20">import static org.apache.hadoop.hbase.trace.HBaseSemanticAttributes.BLOCK_CACHE_KEY_KEY;</span> |
| <span class="source-line-no">021</span><span id="line-21"></span> |
| <span class="source-line-no">022</span><span id="line-22">import io.opentelemetry.api.common.Attributes;</span> |
| <span class="source-line-no">023</span><span id="line-23">import io.opentelemetry.api.trace.Span;</span> |
| <span class="source-line-no">024</span><span id="line-24">import java.io.DataInput;</span> |
| <span class="source-line-no">025</span><span id="line-25">import java.io.IOException;</span> |
| <span class="source-line-no">026</span><span id="line-26">import java.nio.ByteBuffer;</span> |
| <span class="source-line-no">027</span><span id="line-27">import java.util.ArrayList;</span> |
| <span class="source-line-no">028</span><span id="line-28">import java.util.Optional;</span> |
| <span class="source-line-no">029</span><span id="line-29">import java.util.function.IntConsumer;</span> |
| <span class="source-line-no">030</span><span id="line-30">import org.apache.hadoop.conf.Configurable;</span> |
| <span class="source-line-no">031</span><span id="line-31">import org.apache.hadoop.conf.Configuration;</span> |
| <span class="source-line-no">032</span><span id="line-32">import org.apache.hadoop.fs.Path;</span> |
| <span class="source-line-no">033</span><span id="line-33">import org.apache.hadoop.hbase.ByteBufferKeyOnlyKeyValue;</span> |
| <span class="source-line-no">034</span><span id="line-34">import org.apache.hadoop.hbase.Cell;</span> |
| <span class="source-line-no">035</span><span id="line-35">import org.apache.hadoop.hbase.CellComparator;</span> |
| <span class="source-line-no">036</span><span id="line-36">import org.apache.hadoop.hbase.CellUtil;</span> |
| <span class="source-line-no">037</span><span id="line-37">import org.apache.hadoop.hbase.ExtendedCell;</span> |
| <span class="source-line-no">038</span><span id="line-38">import org.apache.hadoop.hbase.HBaseInterfaceAudience;</span> |
| <span class="source-line-no">039</span><span id="line-39">import org.apache.hadoop.hbase.HConstants;</span> |
| <span class="source-line-no">040</span><span id="line-40">import org.apache.hadoop.hbase.KeyValue;</span> |
| <span class="source-line-no">041</span><span id="line-41">import org.apache.hadoop.hbase.PrivateCellUtil;</span> |
| <span class="source-line-no">042</span><span id="line-42">import org.apache.hadoop.hbase.SizeCachedByteBufferKeyValue;</span> |
| <span class="source-line-no">043</span><span id="line-43">import org.apache.hadoop.hbase.SizeCachedKeyValue;</span> |
| <span class="source-line-no">044</span><span id="line-44">import org.apache.hadoop.hbase.SizeCachedNoTagsByteBufferKeyValue;</span> |
| <span class="source-line-no">045</span><span id="line-45">import org.apache.hadoop.hbase.SizeCachedNoTagsKeyValue;</span> |
| <span class="source-line-no">046</span><span id="line-46">import org.apache.hadoop.hbase.io.compress.Compression;</span> |
| <span class="source-line-no">047</span><span id="line-47">import org.apache.hadoop.hbase.io.encoding.DataBlockEncoder;</span> |
| <span class="source-line-no">048</span><span id="line-48">import org.apache.hadoop.hbase.io.encoding.DataBlockEncoding;</span> |
| <span class="source-line-no">049</span><span id="line-49">import org.apache.hadoop.hbase.io.encoding.HFileBlockDecodingContext;</span> |
| <span class="source-line-no">050</span><span id="line-50">import org.apache.hadoop.hbase.monitoring.ThreadLocalServerSideScanMetrics;</span> |
| <span class="source-line-no">051</span><span id="line-51">import org.apache.hadoop.hbase.nio.ByteBuff;</span> |
| <span class="source-line-no">052</span><span id="line-52">import org.apache.hadoop.hbase.regionserver.KeyValueScanner;</span> |
| <span class="source-line-no">053</span><span id="line-53">import org.apache.hadoop.hbase.util.ByteBufferUtils;</span> |
| <span class="source-line-no">054</span><span id="line-54">import org.apache.hadoop.hbase.util.Bytes;</span> |
| <span class="source-line-no">055</span><span id="line-55">import org.apache.hadoop.hbase.util.IdLock;</span> |
| <span class="source-line-no">056</span><span id="line-56">import org.apache.hadoop.hbase.util.ObjectIntPair;</span> |
| <span class="source-line-no">057</span><span id="line-57">import org.apache.hadoop.io.WritableUtils;</span> |
| <span class="source-line-no">058</span><span id="line-58">import org.apache.yetus.audience.InterfaceAudience;</span> |
| <span class="source-line-no">059</span><span id="line-59">import org.slf4j.Logger;</span> |
| <span class="source-line-no">060</span><span id="line-60">import org.slf4j.LoggerFactory;</span> |
| <span class="source-line-no">061</span><span id="line-61"></span> |
| <span class="source-line-no">062</span><span id="line-62">/**</span> |
| <span class="source-line-no">063</span><span id="line-63"> * Implementation that can handle all hfile versions of {@link HFile.Reader}.</span> |
| <span class="source-line-no">064</span><span id="line-64"> */</span> |
| <span class="source-line-no">065</span><span id="line-65">@InterfaceAudience.Private</span> |
| <span class="source-line-no">066</span><span id="line-66">@edu.umd.cs.findbugs.annotations.SuppressWarnings(value = "URF_UNREAD_PUBLIC_OR_PROTECTED_FIELD")</span> |
| <span class="source-line-no">067</span><span id="line-67">public abstract class HFileReaderImpl implements HFile.Reader, Configurable {</span> |
| <span class="source-line-no">068</span><span id="line-68"> // This class is HFileReaderV3 + HFileReaderV2 + AbstractHFileReader all squashed together into</span> |
| <span class="source-line-no">069</span><span id="line-69"> // one file. Ditto for all the HFileReader.ScannerV? implementations. I was running up against</span> |
| <span class="source-line-no">070</span><span id="line-70"> // the MaxInlineLevel limit because too many tiers involved reading from an hfile. Was also hard</span> |
| <span class="source-line-no">071</span><span id="line-71"> // to navigate the source code when so many classes participating in read.</span> |
| <span class="source-line-no">072</span><span id="line-72"> private static final Logger LOG = LoggerFactory.getLogger(HFileReaderImpl.class);</span> |
| <span class="source-line-no">073</span><span id="line-73"></span> |
| <span class="source-line-no">074</span><span id="line-74"> /** Data block index reader keeping the root data index in memory */</span> |
| <span class="source-line-no">075</span><span id="line-75"> protected HFileBlockIndex.CellBasedKeyBlockIndexReader dataBlockIndexReader;</span> |
| <span class="source-line-no">076</span><span id="line-76"></span> |
| <span class="source-line-no">077</span><span id="line-77"> /** Meta block index reader -- always single level */</span> |
| <span class="source-line-no">078</span><span id="line-78"> protected HFileBlockIndex.ByteArrayKeyBlockIndexReader metaBlockIndexReader;</span> |
| <span class="source-line-no">079</span><span id="line-79"></span> |
| <span class="source-line-no">080</span><span id="line-80"> protected FixedFileTrailer trailer;</span> |
| <span class="source-line-no">081</span><span id="line-81"></span> |
| <span class="source-line-no">082</span><span id="line-82"> private final boolean primaryReplicaReader;</span> |
| <span class="source-line-no">083</span><span id="line-83"></span> |
| <span class="source-line-no">084</span><span id="line-84"> /**</span> |
| <span class="source-line-no">085</span><span id="line-85"> * What kind of data block encoding should be used while reading, writing, and handling cache.</span> |
| <span class="source-line-no">086</span><span id="line-86"> */</span> |
| <span class="source-line-no">087</span><span id="line-87"> protected HFileDataBlockEncoder dataBlockEncoder = NoOpDataBlockEncoder.INSTANCE;</span> |
| <span class="source-line-no">088</span><span id="line-88"></span> |
| <span class="source-line-no">089</span><span id="line-89"> /** Block cache configuration. */</span> |
| <span class="source-line-no">090</span><span id="line-90"> protected final CacheConfig cacheConf;</span> |
| <span class="source-line-no">091</span><span id="line-91"></span> |
| <span class="source-line-no">092</span><span id="line-92"> protected ReaderContext context;</span> |
| <span class="source-line-no">093</span><span id="line-93"></span> |
| <span class="source-line-no">094</span><span id="line-94"> protected final HFileInfo fileInfo;</span> |
| <span class="source-line-no">095</span><span id="line-95"></span> |
| <span class="source-line-no">096</span><span id="line-96"> /** Path of file */</span> |
| <span class="source-line-no">097</span><span id="line-97"> protected final Path path;</span> |
| <span class="source-line-no">098</span><span id="line-98"></span> |
| <span class="source-line-no">099</span><span id="line-99"> /** File name to be used for block names */</span> |
| <span class="source-line-no">100</span><span id="line-100"> protected final String name;</span> |
| <span class="source-line-no">101</span><span id="line-101"></span> |
| <span class="source-line-no">102</span><span id="line-102"> private Configuration conf;</span> |
| <span class="source-line-no">103</span><span id="line-103"></span> |
| <span class="source-line-no">104</span><span id="line-104"> protected HFileContext hfileContext;</span> |
| <span class="source-line-no">105</span><span id="line-105"></span> |
| <span class="source-line-no">106</span><span id="line-106"> /** Filesystem-level block reader. */</span> |
| <span class="source-line-no">107</span><span id="line-107"> protected HFileBlock.FSReader fsBlockReader;</span> |
| <span class="source-line-no">108</span><span id="line-108"></span> |
| <span class="source-line-no">109</span><span id="line-109"> /**</span> |
| <span class="source-line-no">110</span><span id="line-110"> * A "sparse lock" implementation allowing to lock on a particular block identified by offset. The</span> |
| <span class="source-line-no">111</span><span id="line-111"> * purpose of this is to avoid two clients loading the same block, and have all but one client</span> |
| <span class="source-line-no">112</span><span id="line-112"> * wait to get the block from the cache.</span> |
| <span class="source-line-no">113</span><span id="line-113"> */</span> |
| <span class="source-line-no">114</span><span id="line-114"> private IdLock offsetLock = new IdLock();</span> |
| <span class="source-line-no">115</span><span id="line-115"></span> |
| <span class="source-line-no">116</span><span id="line-116"> /** Minimum minor version supported by this HFile format */</span> |
| <span class="source-line-no">117</span><span id="line-117"> static final int MIN_MINOR_VERSION = 0;</span> |
| <span class="source-line-no">118</span><span id="line-118"></span> |
| <span class="source-line-no">119</span><span id="line-119"> /** Maximum minor version supported by this HFile format */</span> |
| <span class="source-line-no">120</span><span id="line-120"> // We went to version 2 when we moved to pb'ing fileinfo and the trailer on</span> |
| <span class="source-line-no">121</span><span id="line-121"> // the file. This version can read Writables version 1.</span> |
| <span class="source-line-no">122</span><span id="line-122"> static final int MAX_MINOR_VERSION = 3;</span> |
| <span class="source-line-no">123</span><span id="line-123"></span> |
| <span class="source-line-no">124</span><span id="line-124"> /** Minor versions starting with this number have faked index key */</span> |
| <span class="source-line-no">125</span><span id="line-125"> static final int MINOR_VERSION_WITH_FAKED_KEY = 3;</span> |
| <span class="source-line-no">126</span><span id="line-126"></span> |
| <span class="source-line-no">127</span><span id="line-127"> /**</span> |
| <span class="source-line-no">128</span><span id="line-128"> * Opens a HFile.</span> |
| <span class="source-line-no">129</span><span id="line-129"> * @param context Reader context info</span> |
| <span class="source-line-no">130</span><span id="line-130"> * @param fileInfo HFile info</span> |
| <span class="source-line-no">131</span><span id="line-131"> * @param cacheConf Cache configuration.</span> |
| <span class="source-line-no">132</span><span id="line-132"> * @param conf Configuration</span> |
| <span class="source-line-no">133</span><span id="line-133"> */</span> |
| <span class="source-line-no">134</span><span id="line-134"> @edu.umd.cs.findbugs.annotations.SuppressWarnings(value = "URF_UNREAD_PUBLIC_OR_PROTECTED_FIELD")</span> |
| <span class="source-line-no">135</span><span id="line-135"> public HFileReaderImpl(ReaderContext context, HFileInfo fileInfo, CacheConfig cacheConf,</span> |
| <span class="source-line-no">136</span><span id="line-136"> Configuration conf) throws IOException {</span> |
| <span class="source-line-no">137</span><span id="line-137"> this.cacheConf = cacheConf;</span> |
| <span class="source-line-no">138</span><span id="line-138"> this.context = context;</span> |
| <span class="source-line-no">139</span><span id="line-139"> this.path = context.getFilePath();</span> |
| <span class="source-line-no">140</span><span id="line-140"> this.name = path.getName();</span> |
| <span class="source-line-no">141</span><span id="line-141"> this.conf = conf;</span> |
| <span class="source-line-no">142</span><span id="line-142"> this.primaryReplicaReader = context.isPrimaryReplicaReader();</span> |
| <span class="source-line-no">143</span><span id="line-143"> this.fileInfo = fileInfo;</span> |
| <span class="source-line-no">144</span><span id="line-144"> this.trailer = fileInfo.getTrailer();</span> |
| <span class="source-line-no">145</span><span id="line-145"> this.hfileContext = fileInfo.getHFileContext();</span> |
| <span class="source-line-no">146</span><span id="line-146"> this.fsBlockReader =</span> |
| <span class="source-line-no">147</span><span id="line-147"> new HFileBlock.FSReaderImpl(context, hfileContext, cacheConf.getByteBuffAllocator(), conf);</span> |
| <span class="source-line-no">148</span><span id="line-148"> this.dataBlockEncoder = HFileDataBlockEncoderImpl.createFromFileInfo(fileInfo);</span> |
| <span class="source-line-no">149</span><span id="line-149"> fsBlockReader.setDataBlockEncoder(dataBlockEncoder, conf);</span> |
| <span class="source-line-no">150</span><span id="line-150"> dataBlockIndexReader = fileInfo.getDataBlockIndexReader();</span> |
| <span class="source-line-no">151</span><span id="line-151"> metaBlockIndexReader = fileInfo.getMetaBlockIndexReader();</span> |
| <span class="source-line-no">152</span><span id="line-152"> }</span> |
| <span class="source-line-no">153</span><span id="line-153"></span> |
| <span class="source-line-no">154</span><span id="line-154"> @SuppressWarnings("serial")</span> |
| <span class="source-line-no">155</span><span id="line-155"> public static class BlockIndexNotLoadedException extends IllegalStateException {</span> |
| <span class="source-line-no">156</span><span id="line-156"> public BlockIndexNotLoadedException(Path path) {</span> |
| <span class="source-line-no">157</span><span id="line-157"> // Add a message in case anyone relies on it as opposed to class name.</span> |
| <span class="source-line-no">158</span><span id="line-158"> super(path + " block index not loaded");</span> |
| <span class="source-line-no">159</span><span id="line-159"> }</span> |
| <span class="source-line-no">160</span><span id="line-160"> }</span> |
| <span class="source-line-no">161</span><span id="line-161"></span> |
| <span class="source-line-no">162</span><span id="line-162"> public CacheConfig getCacheConf() {</span> |
| <span class="source-line-no">163</span><span id="line-163"> return cacheConf;</span> |
| <span class="source-line-no">164</span><span id="line-164"> }</span> |
| <span class="source-line-no">165</span><span id="line-165"></span> |
| <span class="source-line-no">166</span><span id="line-166"> private Optional<String> toStringFirstKey() {</span> |
| <span class="source-line-no">167</span><span id="line-167"> return getFirstKey().map(CellUtil::getCellKeyAsString);</span> |
| <span class="source-line-no">168</span><span id="line-168"> }</span> |
| <span class="source-line-no">169</span><span id="line-169"></span> |
| <span class="source-line-no">170</span><span id="line-170"> private Optional<String> toStringLastKey() {</span> |
| <span class="source-line-no">171</span><span id="line-171"> return getLastKey().map(CellUtil::getCellKeyAsString);</span> |
| <span class="source-line-no">172</span><span id="line-172"> }</span> |
| <span class="source-line-no">173</span><span id="line-173"></span> |
| <span class="source-line-no">174</span><span id="line-174"> @Override</span> |
| <span class="source-line-no">175</span><span id="line-175"> public String toString() {</span> |
| <span class="source-line-no">176</span><span id="line-176"> return "reader=" + path.toString()</span> |
| <span class="source-line-no">177</span><span id="line-177"> + (!isFileInfoLoaded()</span> |
| <span class="source-line-no">178</span><span id="line-178"> ? ""</span> |
| <span class="source-line-no">179</span><span id="line-179"> : ", compression=" + trailer.getCompressionCodec().getName() + ", cacheConf=" + cacheConf</span> |
| <span class="source-line-no">180</span><span id="line-180"> + ", firstKey=" + toStringFirstKey() + ", lastKey=" + toStringLastKey())</span> |
| <span class="source-line-no">181</span><span id="line-181"> + ", avgKeyLen=" + fileInfo.getAvgKeyLen() + ", avgValueLen=" + fileInfo.getAvgValueLen()</span> |
| <span class="source-line-no">182</span><span id="line-182"> + ", entries=" + trailer.getEntryCount() + ", length=" + context.getFileSize();</span> |
| <span class="source-line-no">183</span><span id="line-183"> }</span> |
| <span class="source-line-no">184</span><span id="line-184"></span> |
| <span class="source-line-no">185</span><span id="line-185"> @Override</span> |
| <span class="source-line-no">186</span><span id="line-186"> public long length() {</span> |
| <span class="source-line-no">187</span><span id="line-187"> return context.getFileSize();</span> |
| <span class="source-line-no">188</span><span id="line-188"> }</span> |
| <span class="source-line-no">189</span><span id="line-189"></span> |
| <span class="source-line-no">190</span><span id="line-190"> /**</span> |
| <span class="source-line-no">191</span><span id="line-191"> * @return the first key in the file. May be null if file has no entries. Note that this is not</span> |
| <span class="source-line-no">192</span><span id="line-192"> * the first row key, but rather the byte form of the first KeyValue.</span> |
| <span class="source-line-no">193</span><span id="line-193"> */</span> |
| <span class="source-line-no">194</span><span id="line-194"> @Override</span> |
| <span class="source-line-no">195</span><span id="line-195"> public Optional<ExtendedCell> getFirstKey() {</span> |
| <span class="source-line-no">196</span><span id="line-196"> if (dataBlockIndexReader == null) {</span> |
| <span class="source-line-no">197</span><span id="line-197"> throw new BlockIndexNotLoadedException(path);</span> |
| <span class="source-line-no">198</span><span id="line-198"> }</span> |
| <span class="source-line-no">199</span><span id="line-199"> return dataBlockIndexReader.isEmpty()</span> |
| <span class="source-line-no">200</span><span id="line-200"> ? Optional.empty()</span> |
| <span class="source-line-no">201</span><span id="line-201"> : Optional.of(dataBlockIndexReader.getRootBlockKey(0));</span> |
| <span class="source-line-no">202</span><span id="line-202"> }</span> |
| <span class="source-line-no">203</span><span id="line-203"></span> |
| <span class="source-line-no">204</span><span id="line-204"> /**</span> |
| <span class="source-line-no">205</span><span id="line-205"> * TODO left from {@link HFile} version 1: move this to StoreFile after Ryan's patch goes in to</span> |
| <span class="source-line-no">206</span><span id="line-206"> * eliminate {@link KeyValue} here.</span> |
| <span class="source-line-no">207</span><span id="line-207"> * @return the first row key, or null if the file is empty.</span> |
| <span class="source-line-no">208</span><span id="line-208"> */</span> |
| <span class="source-line-no">209</span><span id="line-209"> @Override</span> |
| <span class="source-line-no">210</span><span id="line-210"> public Optional<byte[]> getFirstRowKey() {</span> |
| <span class="source-line-no">211</span><span id="line-211"> // We have to copy the row part to form the row key alone</span> |
| <span class="source-line-no">212</span><span id="line-212"> return getFirstKey().map(CellUtil::cloneRow);</span> |
| <span class="source-line-no">213</span><span id="line-213"> }</span> |
| <span class="source-line-no">214</span><span id="line-214"></span> |
| <span class="source-line-no">215</span><span id="line-215"> /**</span> |
| <span class="source-line-no">216</span><span id="line-216"> * TODO left from {@link HFile} version 1: move this to StoreFile after Ryan's patch goes in to</span> |
| <span class="source-line-no">217</span><span id="line-217"> * eliminate {@link KeyValue} here.</span> |
| <span class="source-line-no">218</span><span id="line-218"> * @return the last row key, or null if the file is empty.</span> |
| <span class="source-line-no">219</span><span id="line-219"> */</span> |
| <span class="source-line-no">220</span><span id="line-220"> @Override</span> |
| <span class="source-line-no">221</span><span id="line-221"> public Optional<byte[]> getLastRowKey() {</span> |
| <span class="source-line-no">222</span><span id="line-222"> // We have to copy the row part to form the row key alone</span> |
| <span class="source-line-no">223</span><span id="line-223"> return getLastKey().map(CellUtil::cloneRow);</span> |
| <span class="source-line-no">224</span><span id="line-224"> }</span> |
| <span class="source-line-no">225</span><span id="line-225"></span> |
| <span class="source-line-no">226</span><span id="line-226"> /** Returns number of KV entries in this HFile */</span> |
| <span class="source-line-no">227</span><span id="line-227"> @Override</span> |
| <span class="source-line-no">228</span><span id="line-228"> public long getEntries() {</span> |
| <span class="source-line-no">229</span><span id="line-229"> return trailer.getEntryCount();</span> |
| <span class="source-line-no">230</span><span id="line-230"> }</span> |
| <span class="source-line-no">231</span><span id="line-231"></span> |
| <span class="source-line-no">232</span><span id="line-232"> /** Returns comparator */</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 CellComparator getComparator() {</span> |
| <span class="source-line-no">235</span><span id="line-235"> return this.hfileContext.getCellComparator();</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"> public Compression.Algorithm getCompressionAlgorithm() {</span> |
| <span class="source-line-no">239</span><span id="line-239"> return trailer.getCompressionCodec();</span> |
| <span class="source-line-no">240</span><span id="line-240"> }</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"> * @return the total heap size of data and meta block indexes in bytes. Does not take into account</span> |
| <span class="source-line-no">244</span><span id="line-244"> * non-root blocks of a multilevel data index.</span> |
| <span class="source-line-no">245</span><span id="line-245"> */</span> |
| <span class="source-line-no">246</span><span id="line-246"> @Override</span> |
| <span class="source-line-no">247</span><span id="line-247"> public long indexSize() {</span> |
| <span class="source-line-no">248</span><span id="line-248"> return (dataBlockIndexReader != null ? dataBlockIndexReader.heapSize() : 0)</span> |
| <span class="source-line-no">249</span><span id="line-249"> + ((metaBlockIndexReader != null) ? metaBlockIndexReader.heapSize() : 0);</span> |
| <span class="source-line-no">250</span><span id="line-250"> }</span> |
| <span class="source-line-no">251</span><span id="line-251"></span> |
| <span class="source-line-no">252</span><span id="line-252"> @Override</span> |
| <span class="source-line-no">253</span><span id="line-253"> public String getName() {</span> |
| <span class="source-line-no">254</span><span id="line-254"> return name;</span> |
| <span class="source-line-no">255</span><span id="line-255"> }</span> |
| <span class="source-line-no">256</span><span id="line-256"></span> |
| <span class="source-line-no">257</span><span id="line-257"> @Override</span> |
| <span class="source-line-no">258</span><span id="line-258"> public void setDataBlockEncoder(HFileDataBlockEncoder dataBlockEncoder) {</span> |
| <span class="source-line-no">259</span><span id="line-259"> this.dataBlockEncoder = dataBlockEncoder;</span> |
| <span class="source-line-no">260</span><span id="line-260"> this.fsBlockReader.setDataBlockEncoder(dataBlockEncoder, conf);</span> |
| <span class="source-line-no">261</span><span id="line-261"> }</span> |
| <span class="source-line-no">262</span><span id="line-262"></span> |
| <span class="source-line-no">263</span><span id="line-263"> @Override</span> |
| <span class="source-line-no">264</span><span id="line-264"> public void setDataBlockIndexReader(HFileBlockIndex.CellBasedKeyBlockIndexReader reader) {</span> |
| <span class="source-line-no">265</span><span id="line-265"> this.dataBlockIndexReader = reader;</span> |
| <span class="source-line-no">266</span><span id="line-266"> }</span> |
| <span class="source-line-no">267</span><span id="line-267"></span> |
| <span class="source-line-no">268</span><span id="line-268"> @Override</span> |
| <span class="source-line-no">269</span><span id="line-269"> public HFileBlockIndex.CellBasedKeyBlockIndexReader getDataBlockIndexReader() {</span> |
| <span class="source-line-no">270</span><span id="line-270"> return dataBlockIndexReader;</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"> @Override</span> |
| <span class="source-line-no">274</span><span id="line-274"> public void setMetaBlockIndexReader(HFileBlockIndex.ByteArrayKeyBlockIndexReader reader) {</span> |
| <span class="source-line-no">275</span><span id="line-275"> this.metaBlockIndexReader = reader;</span> |
| <span class="source-line-no">276</span><span id="line-276"> }</span> |
| <span class="source-line-no">277</span><span id="line-277"></span> |
| <span class="source-line-no">278</span><span id="line-278"> @Override</span> |
| <span class="source-line-no">279</span><span id="line-279"> public HFileBlockIndex.ByteArrayKeyBlockIndexReader getMetaBlockIndexReader() {</span> |
| <span class="source-line-no">280</span><span id="line-280"> return metaBlockIndexReader;</span> |
| <span class="source-line-no">281</span><span id="line-281"> }</span> |
| <span class="source-line-no">282</span><span id="line-282"></span> |
| <span class="source-line-no">283</span><span id="line-283"> @Override</span> |
| <span class="source-line-no">284</span><span id="line-284"> public FixedFileTrailer getTrailer() {</span> |
| <span class="source-line-no">285</span><span id="line-285"> return trailer;</span> |
| <span class="source-line-no">286</span><span id="line-286"> }</span> |
| <span class="source-line-no">287</span><span id="line-287"></span> |
| <span class="source-line-no">288</span><span id="line-288"> @Override</span> |
| <span class="source-line-no">289</span><span id="line-289"> public ReaderContext getContext() {</span> |
| <span class="source-line-no">290</span><span id="line-290"> return this.context;</span> |
| <span class="source-line-no">291</span><span id="line-291"> }</span> |
| <span class="source-line-no">292</span><span id="line-292"></span> |
| <span class="source-line-no">293</span><span id="line-293"> @Override</span> |
| <span class="source-line-no">294</span><span id="line-294"> public HFileInfo getHFileInfo() {</span> |
| <span class="source-line-no">295</span><span id="line-295"> return this.fileInfo;</span> |
| <span class="source-line-no">296</span><span id="line-296"> }</span> |
| <span class="source-line-no">297</span><span id="line-297"></span> |
| <span class="source-line-no">298</span><span id="line-298"> @Override</span> |
| <span class="source-line-no">299</span><span id="line-299"> public boolean isPrimaryReplicaReader() {</span> |
| <span class="source-line-no">300</span><span id="line-300"> return primaryReplicaReader;</span> |
| <span class="source-line-no">301</span><span id="line-301"> }</span> |
| <span class="source-line-no">302</span><span id="line-302"></span> |
| <span class="source-line-no">303</span><span id="line-303"> /**</span> |
| <span class="source-line-no">304</span><span id="line-304"> * An exception thrown when an operation requiring a scanner to be seeked is invoked on a scanner</span> |
| <span class="source-line-no">305</span><span id="line-305"> * that is not seeked.</span> |
| <span class="source-line-no">306</span><span id="line-306"> */</span> |
| <span class="source-line-no">307</span><span id="line-307"> @SuppressWarnings("serial")</span> |
| <span class="source-line-no">308</span><span id="line-308"> public static class NotSeekedException extends IllegalStateException {</span> |
| <span class="source-line-no">309</span><span id="line-309"> public NotSeekedException(Path path) {</span> |
| <span class="source-line-no">310</span><span id="line-310"> super(path + " not seeked to a key/value");</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"></span> |
| <span class="source-line-no">314</span><span id="line-314"> public static class HFileScannerImpl implements HFileScanner {</span> |
| <span class="source-line-no">315</span><span id="line-315"> private ByteBuff blockBuffer;</span> |
| <span class="source-line-no">316</span><span id="line-316"> protected final boolean cacheBlocks;</span> |
| <span class="source-line-no">317</span><span id="line-317"> protected final boolean pread;</span> |
| <span class="source-line-no">318</span><span id="line-318"> protected final boolean isCompaction;</span> |
| <span class="source-line-no">319</span><span id="line-319"> private int currKeyLen;</span> |
| <span class="source-line-no">320</span><span id="line-320"> private int currValueLen;</span> |
| <span class="source-line-no">321</span><span id="line-321"> private int currMemstoreTSLen;</span> |
| <span class="source-line-no">322</span><span id="line-322"> private long currMemstoreTS;</span> |
| <span class="source-line-no">323</span><span id="line-323"> protected final HFile.Reader reader;</span> |
| <span class="source-line-no">324</span><span id="line-324"> private int currTagsLen;</span> |
| <span class="source-line-no">325</span><span id="line-325"> private short rowLen;</span> |
| <span class="source-line-no">326</span><span id="line-326"> // buffer backed keyonlyKV</span> |
| <span class="source-line-no">327</span><span id="line-327"> private ByteBufferKeyOnlyKeyValue bufBackedKeyOnlyKv = new ByteBufferKeyOnlyKeyValue();</span> |
| <span class="source-line-no">328</span><span id="line-328"> // A pair for reusing in blockSeek() so that we don't garbage lot of objects</span> |
| <span class="source-line-no">329</span><span id="line-329"> final ObjectIntPair<ByteBuffer> pair = new ObjectIntPair<>();</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"> * The next indexed key is to keep track of the indexed key of the next data block. If the</span> |
| <span class="source-line-no">333</span><span id="line-333"> * nextIndexedKey is HConstants.NO_NEXT_INDEXED_KEY, it means that the current data block is the</span> |
| <span class="source-line-no">334</span><span id="line-334"> * last data block. If the nextIndexedKey is null, it means the nextIndexedKey has not been</span> |
| <span class="source-line-no">335</span><span id="line-335"> * loaded yet.</span> |
| <span class="source-line-no">336</span><span id="line-336"> */</span> |
| <span class="source-line-no">337</span><span id="line-337"> protected ExtendedCell nextIndexedKey;</span> |
| <span class="source-line-no">338</span><span id="line-338"></span> |
| <span class="source-line-no">339</span><span id="line-339"> // Current block being used. NOTICE: DON't release curBlock separately except in shipped() or</span> |
| <span class="source-line-no">340</span><span id="line-340"> // close() methods. Because the shipped() or close() will do the release finally, even if any</span> |
| <span class="source-line-no">341</span><span id="line-341"> // exception occur the curBlock will be released by the close() method (see</span> |
| <span class="source-line-no">342</span><span id="line-342"> // RegionScannerImpl#handleException). Call the releaseIfNotCurBlock() to release the</span> |
| <span class="source-line-no">343</span><span id="line-343"> // unreferenced block please.</span> |
| <span class="source-line-no">344</span><span id="line-344"> protected HFileBlock curBlock;</span> |
| <span class="source-line-no">345</span><span id="line-345"> // Whether we returned a result for curBlock's size in recordBlockSize().</span> |
| <span class="source-line-no">346</span><span id="line-346"> // gets reset whenever curBlock is changed.</span> |
| <span class="source-line-no">347</span><span id="line-347"> private boolean providedCurrentBlockSize = false;</span> |
| <span class="source-line-no">348</span><span id="line-348"></span> |
| <span class="source-line-no">349</span><span id="line-349"> public HFileBlock getCurBlock() {</span> |
| <span class="source-line-no">350</span><span id="line-350"> return curBlock;</span> |
| <span class="source-line-no">351</span><span id="line-351"> }</span> |
| <span class="source-line-no">352</span><span id="line-352"></span> |
| <span class="source-line-no">353</span><span id="line-353"> // Previous blocks that were used in the course of the read</span> |
| <span class="source-line-no">354</span><span id="line-354"> protected final ArrayList<HFileBlock> prevBlocks = new ArrayList<>();</span> |
| <span class="source-line-no">355</span><span id="line-355"></span> |
| <span class="source-line-no">356</span><span id="line-356"> public HFileScannerImpl(final HFile.Reader reader, final boolean cacheBlocks,</span> |
| <span class="source-line-no">357</span><span id="line-357"> final boolean pread, final boolean isCompaction) {</span> |
| <span class="source-line-no">358</span><span id="line-358"> this.reader = reader;</span> |
| <span class="source-line-no">359</span><span id="line-359"> this.cacheBlocks = cacheBlocks;</span> |
| <span class="source-line-no">360</span><span id="line-360"> this.pread = pread;</span> |
| <span class="source-line-no">361</span><span id="line-361"> this.isCompaction = isCompaction;</span> |
| <span class="source-line-no">362</span><span id="line-362"> }</span> |
| <span class="source-line-no">363</span><span id="line-363"></span> |
| <span class="source-line-no">364</span><span id="line-364"> void updateCurrBlockRef(HFileBlock block) {</span> |
| <span class="source-line-no">365</span><span id="line-365"> if (block != null && curBlock != null && block.getOffset() == curBlock.getOffset()) {</span> |
| <span class="source-line-no">366</span><span id="line-366"> return;</span> |
| <span class="source-line-no">367</span><span id="line-367"> }</span> |
| <span class="source-line-no">368</span><span id="line-368"> if (this.curBlock != null && this.curBlock.isSharedMem()) {</span> |
| <span class="source-line-no">369</span><span id="line-369"> prevBlocks.add(this.curBlock);</span> |
| <span class="source-line-no">370</span><span id="line-370"> }</span> |
| <span class="source-line-no">371</span><span id="line-371"> this.curBlock = block;</span> |
| <span class="source-line-no">372</span><span id="line-372"> this.providedCurrentBlockSize = false;</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"> void reset() {</span> |
| <span class="source-line-no">376</span><span id="line-376"> // We don't have to keep ref to heap block</span> |
| <span class="source-line-no">377</span><span id="line-377"> if (this.curBlock != null && this.curBlock.isSharedMem()) {</span> |
| <span class="source-line-no">378</span><span id="line-378"> this.prevBlocks.add(this.curBlock);</span> |
| <span class="source-line-no">379</span><span id="line-379"> }</span> |
| <span class="source-line-no">380</span><span id="line-380"> this.curBlock = null;</span> |
| <span class="source-line-no">381</span><span id="line-381"> }</span> |
| <span class="source-line-no">382</span><span id="line-382"></span> |
| <span class="source-line-no">383</span><span id="line-383"> private void returnBlocks(boolean returnAll) {</span> |
| <span class="source-line-no">384</span><span id="line-384"> this.prevBlocks.forEach(HFileBlock::release);</span> |
| <span class="source-line-no">385</span><span id="line-385"> this.prevBlocks.clear();</span> |
| <span class="source-line-no">386</span><span id="line-386"> if (returnAll && this.curBlock != null) {</span> |
| <span class="source-line-no">387</span><span id="line-387"> this.curBlock.release();</span> |
| <span class="source-line-no">388</span><span id="line-388"> this.curBlock = null;</span> |
| <span class="source-line-no">389</span><span id="line-389"> }</span> |
| <span class="source-line-no">390</span><span id="line-390"> }</span> |
| <span class="source-line-no">391</span><span id="line-391"></span> |
| <span class="source-line-no">392</span><span id="line-392"> @Override</span> |
| <span class="source-line-no">393</span><span id="line-393"> public boolean isSeeked() {</span> |
| <span class="source-line-no">394</span><span id="line-394"> return blockBuffer != null;</span> |
| <span class="source-line-no">395</span><span id="line-395"> }</span> |
| <span class="source-line-no">396</span><span id="line-396"></span> |
| <span class="source-line-no">397</span><span id="line-397"> @Override</span> |
| <span class="source-line-no">398</span><span id="line-398"> public String toString() {</span> |
| <span class="source-line-no">399</span><span id="line-399"> return "HFileScanner for reader " + String.valueOf(getReader());</span> |
| <span class="source-line-no">400</span><span id="line-400"> }</span> |
| <span class="source-line-no">401</span><span id="line-401"></span> |
| <span class="source-line-no">402</span><span id="line-402"> protected void assertSeeked() {</span> |
| <span class="source-line-no">403</span><span id="line-403"> if (!isSeeked()) {</span> |
| <span class="source-line-no">404</span><span id="line-404"> throw new NotSeekedException(reader.getPath());</span> |
| <span class="source-line-no">405</span><span id="line-405"> }</span> |
| <span class="source-line-no">406</span><span id="line-406"> }</span> |
| <span class="source-line-no">407</span><span id="line-407"></span> |
| <span class="source-line-no">408</span><span id="line-408"> @Override</span> |
| <span class="source-line-no">409</span><span id="line-409"> public HFile.Reader getReader() {</span> |
| <span class="source-line-no">410</span><span id="line-410"> return reader;</span> |
| <span class="source-line-no">411</span><span id="line-411"> }</span> |
| <span class="source-line-no">412</span><span id="line-412"></span> |
| <span class="source-line-no">413</span><span id="line-413"> // From non encoded HFiles, we always read back KeyValue or its descendant.(Note: When HFile</span> |
| <span class="source-line-no">414</span><span id="line-414"> // block is in DBB, it will be OffheapKV). So all parts of the Cell is in a contiguous</span> |
| <span class="source-line-no">415</span><span id="line-415"> // array/buffer. How many bytes we should wrap to make the KV is what this method returns.</span> |
| <span class="source-line-no">416</span><span id="line-416"> private int getKVBufSize() {</span> |
| <span class="source-line-no">417</span><span id="line-417"> int kvBufSize = KEY_VALUE_LEN_SIZE + currKeyLen + currValueLen;</span> |
| <span class="source-line-no">418</span><span id="line-418"> if (currTagsLen > 0) {</span> |
| <span class="source-line-no">419</span><span id="line-419"> kvBufSize += Bytes.SIZEOF_SHORT + currTagsLen;</span> |
| <span class="source-line-no">420</span><span id="line-420"> }</span> |
| <span class="source-line-no">421</span><span id="line-421"> return kvBufSize;</span> |
| <span class="source-line-no">422</span><span id="line-422"> }</span> |
| <span class="source-line-no">423</span><span id="line-423"></span> |
| <span class="source-line-no">424</span><span id="line-424"> @Override</span> |
| <span class="source-line-no">425</span><span id="line-425"> public void close() {</span> |
| <span class="source-line-no">426</span><span id="line-426"> if (!pread) {</span> |
| <span class="source-line-no">427</span><span id="line-427"> // For seek + pread stream socket should be closed when the scanner is closed. HBASE-9393</span> |
| <span class="source-line-no">428</span><span id="line-428"> reader.unbufferStream();</span> |
| <span class="source-line-no">429</span><span id="line-429"> }</span> |
| <span class="source-line-no">430</span><span id="line-430"> this.returnBlocks(true);</span> |
| <span class="source-line-no">431</span><span id="line-431"> }</span> |
| <span class="source-line-no">432</span><span id="line-432"></span> |
| <span class="source-line-no">433</span><span id="line-433"> @Override</span> |
| <span class="source-line-no">434</span><span id="line-434"> public void recordBlockSize(IntConsumer blockSizeConsumer) {</span> |
| <span class="source-line-no">435</span><span id="line-435"> if (!providedCurrentBlockSize && curBlock != null) {</span> |
| <span class="source-line-no">436</span><span id="line-436"> providedCurrentBlockSize = true;</span> |
| <span class="source-line-no">437</span><span id="line-437"> blockSizeConsumer.accept(curBlock.getUncompressedSizeWithoutHeader());</span> |
| <span class="source-line-no">438</span><span id="line-438"> }</span> |
| <span class="source-line-no">439</span><span id="line-439"> }</span> |
| <span class="source-line-no">440</span><span id="line-440"></span> |
| <span class="source-line-no">441</span><span id="line-441"> // Returns the #bytes in HFile for the current cell. Used to skip these many bytes in current</span> |
| <span class="source-line-no">442</span><span id="line-442"> // HFile block's buffer so as to position to the next cell.</span> |
| <span class="source-line-no">443</span><span id="line-443"> private int getCurCellSerializedSize() {</span> |
| <span class="source-line-no">444</span><span id="line-444"> int curCellSize = KEY_VALUE_LEN_SIZE + currKeyLen + currValueLen + currMemstoreTSLen;</span> |
| <span class="source-line-no">445</span><span id="line-445"> if (this.reader.getFileContext().isIncludesTags()) {</span> |
| <span class="source-line-no">446</span><span id="line-446"> curCellSize += Bytes.SIZEOF_SHORT + currTagsLen;</span> |
| <span class="source-line-no">447</span><span id="line-447"> }</span> |
| <span class="source-line-no">448</span><span id="line-448"> return curCellSize;</span> |
| <span class="source-line-no">449</span><span id="line-449"> }</span> |
| <span class="source-line-no">450</span><span id="line-450"></span> |
| <span class="source-line-no">451</span><span id="line-451"> protected void readKeyValueLen() {</span> |
| <span class="source-line-no">452</span><span id="line-452"> // This is a hot method. We go out of our way to make this method short so it can be</span> |
| <span class="source-line-no">453</span><span id="line-453"> // inlined and is not too big to compile. We also manage position in ByteBuffer ourselves</span> |
| <span class="source-line-no">454</span><span id="line-454"> // because it is faster than going via range-checked ByteBuffer methods or going through a</span> |
| <span class="source-line-no">455</span><span id="line-455"> // byte buffer array a byte at a time.</span> |
| <span class="source-line-no">456</span><span id="line-456"> // Get a long at a time rather than read two individual ints. In micro-benchmarking, even</span> |
| <span class="source-line-no">457</span><span id="line-457"> // with the extra bit-fiddling, this is order-of-magnitude faster than getting two ints.</span> |
| <span class="source-line-no">458</span><span id="line-458"> // Trying to imitate what was done - need to profile if this is better or</span> |
| <span class="source-line-no">459</span><span id="line-459"> // earlier way is better by doing mark and reset?</span> |
| <span class="source-line-no">460</span><span id="line-460"> // But ensure that you read long instead of two ints</span> |
| <span class="source-line-no">461</span><span id="line-461"> long ll = blockBuffer.getLongAfterPosition(0);</span> |
| <span class="source-line-no">462</span><span id="line-462"> // Read top half as an int of key length and bottom int as value length</span> |
| <span class="source-line-no">463</span><span id="line-463"> this.currKeyLen = (int) (ll >> Integer.SIZE);</span> |
| <span class="source-line-no">464</span><span id="line-464"> this.currValueLen = (int) (Bytes.MASK_FOR_LOWER_INT_IN_LONG ^ ll);</span> |
| <span class="source-line-no">465</span><span id="line-465"> checkKeyValueLen();</span> |
| <span class="source-line-no">466</span><span id="line-466"> this.rowLen = blockBuffer.getShortAfterPosition(Bytes.SIZEOF_LONG);</span> |
| <span class="source-line-no">467</span><span id="line-467"> // Move position past the key and value lengths and then beyond the key and value</span> |
| <span class="source-line-no">468</span><span id="line-468"> int p = (Bytes.SIZEOF_LONG + currKeyLen + currValueLen);</span> |
| <span class="source-line-no">469</span><span id="line-469"> if (reader.getFileContext().isIncludesTags()) {</span> |
| <span class="source-line-no">470</span><span id="line-470"> // Tags length is a short.</span> |
| <span class="source-line-no">471</span><span id="line-471"> this.currTagsLen = blockBuffer.getShortAfterPosition(p);</span> |
| <span class="source-line-no">472</span><span id="line-472"> checkTagsLen();</span> |
| <span class="source-line-no">473</span><span id="line-473"> p += (Bytes.SIZEOF_SHORT + currTagsLen);</span> |
| <span class="source-line-no">474</span><span id="line-474"> }</span> |
| <span class="source-line-no">475</span><span id="line-475"> readMvccVersion(p);</span> |
| <span class="source-line-no">476</span><span id="line-476"> }</span> |
| <span class="source-line-no">477</span><span id="line-477"></span> |
| <span class="source-line-no">478</span><span id="line-478"> private final void checkTagsLen() {</span> |
| <span class="source-line-no">479</span><span id="line-479"> if (checkLen(this.currTagsLen)) {</span> |
| <span class="source-line-no">480</span><span id="line-480"> throw new IllegalStateException(</span> |
| <span class="source-line-no">481</span><span id="line-481"> "Invalid currTagsLen " + this.currTagsLen + ". Block offset: " + curBlock.getOffset()</span> |
| <span class="source-line-no">482</span><span id="line-482"> + ", block length: " + this.blockBuffer.limit() + ", position: "</span> |
| <span class="source-line-no">483</span><span id="line-483"> + this.blockBuffer.position() + " (without header)." + " path=" + reader.getPath());</span> |
| <span class="source-line-no">484</span><span id="line-484"> }</span> |
| <span class="source-line-no">485</span><span id="line-485"> }</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"> * Read mvcc. Does checks to see if we even need to read the mvcc at all.</span> |
| <span class="source-line-no">489</span><span id="line-489"> */</span> |
| <span class="source-line-no">490</span><span id="line-490"> protected void readMvccVersion(final int offsetFromPos) {</span> |
| <span class="source-line-no">491</span><span id="line-491"> // See if we even need to decode mvcc.</span> |
| <span class="source-line-no">492</span><span id="line-492"> if (!this.reader.getHFileInfo().shouldIncludeMemStoreTS()) {</span> |
| <span class="source-line-no">493</span><span id="line-493"> return;</span> |
| <span class="source-line-no">494</span><span id="line-494"> }</span> |
| <span class="source-line-no">495</span><span id="line-495"> if (!this.reader.getHFileInfo().isDecodeMemstoreTS()) {</span> |
| <span class="source-line-no">496</span><span id="line-496"> currMemstoreTS = 0;</span> |
| <span class="source-line-no">497</span><span id="line-497"> currMemstoreTSLen = 1;</span> |
| <span class="source-line-no">498</span><span id="line-498"> return;</span> |
| <span class="source-line-no">499</span><span id="line-499"> }</span> |
| <span class="source-line-no">500</span><span id="line-500"> _readMvccVersion(offsetFromPos);</span> |
| <span class="source-line-no">501</span><span id="line-501"> }</span> |
| <span class="source-line-no">502</span><span id="line-502"></span> |
| <span class="source-line-no">503</span><span id="line-503"> /**</span> |
| <span class="source-line-no">504</span><span id="line-504"> * Actually do the mvcc read. Does no checks.</span> |
| <span class="source-line-no">505</span><span id="line-505"> */</span> |
| <span class="source-line-no">506</span><span id="line-506"> private void _readMvccVersion(int offsetFromPos) {</span> |
| <span class="source-line-no">507</span><span id="line-507"> // This is Bytes#bytesToVint inlined so can save a few instructions in this hot method; i.e.</span> |
| <span class="source-line-no">508</span><span id="line-508"> // previous if one-byte vint, we'd redo the vint call to find int size.</span> |
| <span class="source-line-no">509</span><span id="line-509"> // Also the method is kept small so can be inlined.</span> |
| <span class="source-line-no">510</span><span id="line-510"> byte firstByte = blockBuffer.getByteAfterPosition(offsetFromPos);</span> |
| <span class="source-line-no">511</span><span id="line-511"> int len = WritableUtils.decodeVIntSize(firstByte);</span> |
| <span class="source-line-no">512</span><span id="line-512"> if (len == 1) {</span> |
| <span class="source-line-no">513</span><span id="line-513"> this.currMemstoreTS = firstByte;</span> |
| <span class="source-line-no">514</span><span id="line-514"> } else {</span> |
| <span class="source-line-no">515</span><span id="line-515"> int remaining = len - 1;</span> |
| <span class="source-line-no">516</span><span id="line-516"> long i = 0;</span> |
| <span class="source-line-no">517</span><span id="line-517"> offsetFromPos++;</span> |
| <span class="source-line-no">518</span><span id="line-518"> if (remaining >= Bytes.SIZEOF_INT) {</span> |
| <span class="source-line-no">519</span><span id="line-519"> // The int read has to be converted to unsigned long so the & op</span> |
| <span class="source-line-no">520</span><span id="line-520"> i = (blockBuffer.getIntAfterPosition(offsetFromPos) & 0x00000000ffffffffL);</span> |
| <span class="source-line-no">521</span><span id="line-521"> remaining -= Bytes.SIZEOF_INT;</span> |
| <span class="source-line-no">522</span><span id="line-522"> offsetFromPos += Bytes.SIZEOF_INT;</span> |
| <span class="source-line-no">523</span><span id="line-523"> }</span> |
| <span class="source-line-no">524</span><span id="line-524"> if (remaining >= Bytes.SIZEOF_SHORT) {</span> |
| <span class="source-line-no">525</span><span id="line-525"> short s = blockBuffer.getShortAfterPosition(offsetFromPos);</span> |
| <span class="source-line-no">526</span><span id="line-526"> i = i << 16;</span> |
| <span class="source-line-no">527</span><span id="line-527"> i = i | (s & 0xFFFF);</span> |
| <span class="source-line-no">528</span><span id="line-528"> remaining -= Bytes.SIZEOF_SHORT;</span> |
| <span class="source-line-no">529</span><span id="line-529"> offsetFromPos += Bytes.SIZEOF_SHORT;</span> |
| <span class="source-line-no">530</span><span id="line-530"> }</span> |
| <span class="source-line-no">531</span><span id="line-531"> for (int idx = 0; idx < remaining; idx++) {</span> |
| <span class="source-line-no">532</span><span id="line-532"> byte b = blockBuffer.getByteAfterPosition(offsetFromPos + idx);</span> |
| <span class="source-line-no">533</span><span id="line-533"> i = i << 8;</span> |
| <span class="source-line-no">534</span><span id="line-534"> i = i | (b & 0xFF);</span> |
| <span class="source-line-no">535</span><span id="line-535"> }</span> |
| <span class="source-line-no">536</span><span id="line-536"> currMemstoreTS = (WritableUtils.isNegativeVInt(firstByte) ? ~i : i);</span> |
| <span class="source-line-no">537</span><span id="line-537"> }</span> |
| <span class="source-line-no">538</span><span id="line-538"> this.currMemstoreTSLen = len;</span> |
| <span class="source-line-no">539</span><span id="line-539"> }</span> |
| <span class="source-line-no">540</span><span id="line-540"></span> |
| <span class="source-line-no">541</span><span id="line-541"> /**</span> |
| <span class="source-line-no">542</span><span id="line-542"> * Within a loaded block, seek looking for the last key that is smaller than (or equal to?) the</span> |
| <span class="source-line-no">543</span><span id="line-543"> * key we are interested in. A note on the seekBefore: if you have seekBefore = true, AND the</span> |
| <span class="source-line-no">544</span><span id="line-544"> * first key in the block = key, then you'll get thrown exceptions. The caller has to check for</span> |
| <span class="source-line-no">545</span><span id="line-545"> * that case and load the previous block as appropriate. the key to find find the key before the</span> |
| <span class="source-line-no">546</span><span id="line-546"> * given key in case of exact match.</span> |
| <span class="source-line-no">547</span><span id="line-547"> * @return 0 in case of an exact key match, 1 in case of an inexact match, -2 in case of an</span> |
| <span class="source-line-no">548</span><span id="line-548"> * inexact match and furthermore, the input key less than the first key of current</span> |
| <span class="source-line-no">549</span><span id="line-549"> * block(e.g. using a faked index key)</span> |
| <span class="source-line-no">550</span><span id="line-550"> */</span> |
| <span class="source-line-no">551</span><span id="line-551"> protected int blockSeek(Cell key, boolean seekBefore) {</span> |
| <span class="source-line-no">552</span><span id="line-552"> int klen, vlen, tlen = 0;</span> |
| <span class="source-line-no">553</span><span id="line-553"> int lastKeyValueSize = -1;</span> |
| <span class="source-line-no">554</span><span id="line-554"> int offsetFromPos;</span> |
| <span class="source-line-no">555</span><span id="line-555"> do {</span> |
| <span class="source-line-no">556</span><span id="line-556"> offsetFromPos = 0;</span> |
| <span class="source-line-no">557</span><span id="line-557"> // Better to ensure that we use the BB Utils here</span> |
| <span class="source-line-no">558</span><span id="line-558"> long ll = blockBuffer.getLongAfterPosition(offsetFromPos);</span> |
| <span class="source-line-no">559</span><span id="line-559"> klen = (int) (ll >> Integer.SIZE);</span> |
| <span class="source-line-no">560</span><span id="line-560"> vlen = (int) (Bytes.MASK_FOR_LOWER_INT_IN_LONG ^ ll);</span> |
| <span class="source-line-no">561</span><span id="line-561"> if (checkKeyLen(klen) || checkLen(vlen)) {</span> |
| <span class="source-line-no">562</span><span id="line-562"> throw new IllegalStateException(</span> |
| <span class="source-line-no">563</span><span id="line-563"> "Invalid klen " + klen + " or vlen " + vlen + ". Block offset: " + curBlock.getOffset()</span> |
| <span class="source-line-no">564</span><span id="line-564"> + ", block length: " + blockBuffer.limit() + ", position: " + blockBuffer.position()</span> |
| <span class="source-line-no">565</span><span id="line-565"> + " (without header)." + " path=" + reader.getPath());</span> |
| <span class="source-line-no">566</span><span id="line-566"> }</span> |
| <span class="source-line-no">567</span><span id="line-567"> offsetFromPos += Bytes.SIZEOF_LONG;</span> |
| <span class="source-line-no">568</span><span id="line-568"> this.rowLen = blockBuffer.getShortAfterPosition(offsetFromPos);</span> |
| <span class="source-line-no">569</span><span id="line-569"> blockBuffer.asSubByteBuffer(blockBuffer.position() + offsetFromPos, klen, pair);</span> |
| <span class="source-line-no">570</span><span id="line-570"> bufBackedKeyOnlyKv.setKey(pair.getFirst(), pair.getSecond(), klen, rowLen);</span> |
| <span class="source-line-no">571</span><span id="line-571"> int comp =</span> |
| <span class="source-line-no">572</span><span id="line-572"> PrivateCellUtil.compareKeyIgnoresMvcc(reader.getComparator(), key, bufBackedKeyOnlyKv);</span> |
| <span class="source-line-no">573</span><span id="line-573"> offsetFromPos += klen + vlen;</span> |
| <span class="source-line-no">574</span><span id="line-574"> if (this.reader.getFileContext().isIncludesTags()) {</span> |
| <span class="source-line-no">575</span><span id="line-575"> // Read short as unsigned, high byte first</span> |
| <span class="source-line-no">576</span><span id="line-576"> tlen = ((blockBuffer.getByteAfterPosition(offsetFromPos) & 0xff) << 8)</span> |
| <span class="source-line-no">577</span><span id="line-577"> ^ (blockBuffer.getByteAfterPosition(offsetFromPos + 1) & 0xff);</span> |
| <span class="source-line-no">578</span><span id="line-578"> if (checkLen(tlen)) {</span> |
| <span class="source-line-no">579</span><span id="line-579"> throw new IllegalStateException("Invalid tlen " + tlen + ". Block offset: "</span> |
| <span class="source-line-no">580</span><span id="line-580"> + curBlock.getOffset() + ", block length: " + blockBuffer.limit() + ", position: "</span> |
| <span class="source-line-no">581</span><span id="line-581"> + blockBuffer.position() + " (without header)." + " path=" + reader.getPath());</span> |
| <span class="source-line-no">582</span><span id="line-582"> }</span> |
| <span class="source-line-no">583</span><span id="line-583"> // add the two bytes read for the tags.</span> |
| <span class="source-line-no">584</span><span id="line-584"> offsetFromPos += tlen + (Bytes.SIZEOF_SHORT);</span> |
| <span class="source-line-no">585</span><span id="line-585"> }</span> |
| <span class="source-line-no">586</span><span id="line-586"> if (this.reader.getHFileInfo().shouldIncludeMemStoreTS()) {</span> |
| <span class="source-line-no">587</span><span id="line-587"> // Directly read the mvcc based on current position</span> |
| <span class="source-line-no">588</span><span id="line-588"> readMvccVersion(offsetFromPos);</span> |
| <span class="source-line-no">589</span><span id="line-589"> }</span> |
| <span class="source-line-no">590</span><span id="line-590"> if (comp == 0) {</span> |
| <span class="source-line-no">591</span><span id="line-591"> if (seekBefore) {</span> |
| <span class="source-line-no">592</span><span id="line-592"> if (lastKeyValueSize < 0) {</span> |
| <span class="source-line-no">593</span><span id="line-593"> throw new IllegalStateException("blockSeek with seekBefore "</span> |
| <span class="source-line-no">594</span><span id="line-594"> + "at the first key of the block: key=" + CellUtil.getCellKeyAsString(key)</span> |
| <span class="source-line-no">595</span><span id="line-595"> + ", blockOffset=" + curBlock.getOffset() + ", onDiskSize="</span> |
| <span class="source-line-no">596</span><span id="line-596"> + curBlock.getOnDiskSizeWithHeader() + ", path=" + reader.getPath());</span> |
| <span class="source-line-no">597</span><span id="line-597"> }</span> |
| <span class="source-line-no">598</span><span id="line-598"> blockBuffer.moveBack(lastKeyValueSize);</span> |
| <span class="source-line-no">599</span><span id="line-599"> readKeyValueLen();</span> |
| <span class="source-line-no">600</span><span id="line-600"> return 1; // non exact match.</span> |
| <span class="source-line-no">601</span><span id="line-601"> }</span> |
| <span class="source-line-no">602</span><span id="line-602"> currKeyLen = klen;</span> |
| <span class="source-line-no">603</span><span id="line-603"> currValueLen = vlen;</span> |
| <span class="source-line-no">604</span><span id="line-604"> currTagsLen = tlen;</span> |
| <span class="source-line-no">605</span><span id="line-605"> return 0; // indicate exact match</span> |
| <span class="source-line-no">606</span><span id="line-606"> } else if (comp < 0) {</span> |
| <span class="source-line-no">607</span><span id="line-607"> if (lastKeyValueSize > 0) {</span> |
| <span class="source-line-no">608</span><span id="line-608"> blockBuffer.moveBack(lastKeyValueSize);</span> |
| <span class="source-line-no">609</span><span id="line-609"> }</span> |
| <span class="source-line-no">610</span><span id="line-610"> readKeyValueLen();</span> |
| <span class="source-line-no">611</span><span id="line-611"> if (lastKeyValueSize == -1 && blockBuffer.position() == 0) {</span> |
| <span class="source-line-no">612</span><span id="line-612"> return HConstants.INDEX_KEY_MAGIC;</span> |
| <span class="source-line-no">613</span><span id="line-613"> }</span> |
| <span class="source-line-no">614</span><span id="line-614"> return 1;</span> |
| <span class="source-line-no">615</span><span id="line-615"> }</span> |
| <span class="source-line-no">616</span><span id="line-616"> // The size of this key/value tuple, including key/value length fields.</span> |
| <span class="source-line-no">617</span><span id="line-617"> lastKeyValueSize = klen + vlen + currMemstoreTSLen + KEY_VALUE_LEN_SIZE;</span> |
| <span class="source-line-no">618</span><span id="line-618"> // include tag length also if tags included with KV</span> |
| <span class="source-line-no">619</span><span id="line-619"> if (reader.getFileContext().isIncludesTags()) {</span> |
| <span class="source-line-no">620</span><span id="line-620"> lastKeyValueSize += tlen + Bytes.SIZEOF_SHORT;</span> |
| <span class="source-line-no">621</span><span id="line-621"> }</span> |
| <span class="source-line-no">622</span><span id="line-622"> blockBuffer.skip(lastKeyValueSize);</span> |
| <span class="source-line-no">623</span><span id="line-623"> } while (blockBuffer.hasRemaining());</span> |
| <span class="source-line-no">624</span><span id="line-624"></span> |
| <span class="source-line-no">625</span><span id="line-625"> // Seek to the last key we successfully read. This will happen if this is</span> |
| <span class="source-line-no">626</span><span id="line-626"> // the last key/value pair in the file, in which case the following call</span> |
| <span class="source-line-no">627</span><span id="line-627"> // to next() has to return false.</span> |
| <span class="source-line-no">628</span><span id="line-628"> blockBuffer.moveBack(lastKeyValueSize);</span> |
| <span class="source-line-no">629</span><span id="line-629"> readKeyValueLen();</span> |
| <span class="source-line-no">630</span><span id="line-630"> return 1; // didn't exactly find it.</span> |
| <span class="source-line-no">631</span><span id="line-631"> }</span> |
| <span class="source-line-no">632</span><span id="line-632"></span> |
| <span class="source-line-no">633</span><span id="line-633"> @Override</span> |
| <span class="source-line-no">634</span><span id="line-634"> public ExtendedCell getNextIndexedKey() {</span> |
| <span class="source-line-no">635</span><span id="line-635"> return nextIndexedKey;</span> |
| <span class="source-line-no">636</span><span id="line-636"> }</span> |
| <span class="source-line-no">637</span><span id="line-637"></span> |
| <span class="source-line-no">638</span><span id="line-638"> @Override</span> |
| <span class="source-line-no">639</span><span id="line-639"> public int seekTo(ExtendedCell key) throws IOException {</span> |
| <span class="source-line-no">640</span><span id="line-640"> return seekTo(key, true);</span> |
| <span class="source-line-no">641</span><span id="line-641"> }</span> |
| <span class="source-line-no">642</span><span id="line-642"></span> |
| <span class="source-line-no">643</span><span id="line-643"> @Override</span> |
| <span class="source-line-no">644</span><span id="line-644"> public int reseekTo(ExtendedCell key) throws IOException {</span> |
| <span class="source-line-no">645</span><span id="line-645"> int compared;</span> |
| <span class="source-line-no">646</span><span id="line-646"> if (isSeeked()) {</span> |
| <span class="source-line-no">647</span><span id="line-647"> compared = compareKey(reader.getComparator(), key);</span> |
| <span class="source-line-no">648</span><span id="line-648"> if (compared < 1) {</span> |
| <span class="source-line-no">649</span><span id="line-649"> // If the required key is less than or equal to current key, then</span> |
| <span class="source-line-no">650</span><span id="line-650"> // don't do anything.</span> |
| <span class="source-line-no">651</span><span id="line-651"> return compared;</span> |
| <span class="source-line-no">652</span><span id="line-652"> } else {</span> |
| <span class="source-line-no">653</span><span id="line-653"> // The comparison with no_next_index_key has to be checked</span> |
| <span class="source-line-no">654</span><span id="line-654"> if (</span> |
| <span class="source-line-no">655</span><span id="line-655"> this.nextIndexedKey != null && (this.nextIndexedKey</span> |
| <span class="source-line-no">656</span><span id="line-656"> == KeyValueScanner.NO_NEXT_INDEXED_KEY</span> |
| <span class="source-line-no">657</span><span id="line-657"> || PrivateCellUtil.compareKeyIgnoresMvcc(reader.getComparator(), key, nextIndexedKey)</span> |
| <span class="source-line-no">658</span><span id="line-658"> < 0)</span> |
| <span class="source-line-no">659</span><span id="line-659"> ) {</span> |
| <span class="source-line-no">660</span><span id="line-660"> // The reader shall continue to scan the current data block instead</span> |
| <span class="source-line-no">661</span><span id="line-661"> // of querying the</span> |
| <span class="source-line-no">662</span><span id="line-662"> // block index as long as it knows the target key is strictly</span> |
| <span class="source-line-no">663</span><span id="line-663"> // smaller than</span> |
| <span class="source-line-no">664</span><span id="line-664"> // the next indexed key or the current data block is the last data</span> |
| <span class="source-line-no">665</span><span id="line-665"> // block.</span> |
| <span class="source-line-no">666</span><span id="line-666"> return loadBlockAndSeekToKey(this.curBlock, nextIndexedKey, false, key, false);</span> |
| <span class="source-line-no">667</span><span id="line-667"> }</span> |
| <span class="source-line-no">668</span><span id="line-668"> }</span> |
| <span class="source-line-no">669</span><span id="line-669"> }</span> |
| <span class="source-line-no">670</span><span id="line-670"> // Don't rewind on a reseek operation, because reseek implies that we are</span> |
| <span class="source-line-no">671</span><span id="line-671"> // always going forward in the file.</span> |
| <span class="source-line-no">672</span><span id="line-672"> return seekTo(key, false);</span> |
| <span class="source-line-no">673</span><span id="line-673"> }</span> |
| <span class="source-line-no">674</span><span id="line-674"></span> |
| <span class="source-line-no">675</span><span id="line-675"> /**</span> |
| <span class="source-line-no">676</span><span id="line-676"> * An internal API function. Seek to the given key, optionally rewinding to the first key of the</span> |
| <span class="source-line-no">677</span><span id="line-677"> * block before doing the seek.</span> |
| <span class="source-line-no">678</span><span id="line-678"> * @param key - a cell representing the key that we need to fetch</span> |
| <span class="source-line-no">679</span><span id="line-679"> * @param rewind whether to rewind to the first key of the block before doing the seek. If this</span> |
| <span class="source-line-no">680</span><span id="line-680"> * is false, we are assuming we never go back, otherwise the result is undefined.</span> |
| <span class="source-line-no">681</span><span id="line-681"> * @return -1 if the key is earlier than the first key of the file, 0 if we are at the given</span> |
| <span class="source-line-no">682</span><span id="line-682"> * key, 1 if we are past the given key -2 if the key is earlier than the first key of</span> |
| <span class="source-line-no">683</span><span id="line-683"> * the file while using a faked index key</span> |
| <span class="source-line-no">684</span><span id="line-684"> */</span> |
| <span class="source-line-no">685</span><span id="line-685"> public int seekTo(ExtendedCell key, boolean rewind) throws IOException {</span> |
| <span class="source-line-no">686</span><span id="line-686"> HFileBlockIndex.BlockIndexReader indexReader = reader.getDataBlockIndexReader();</span> |
| <span class="source-line-no">687</span><span id="line-687"> BlockWithScanInfo blockWithScanInfo = indexReader.loadDataBlockWithScanInfo(key, curBlock,</span> |
| <span class="source-line-no">688</span><span id="line-688"> cacheBlocks, pread, isCompaction, getEffectiveDataBlockEncoding(), reader);</span> |
| <span class="source-line-no">689</span><span id="line-689"> if (blockWithScanInfo == null || blockWithScanInfo.getHFileBlock() == null) {</span> |
| <span class="source-line-no">690</span><span id="line-690"> // This happens if the key e.g. falls before the beginning of the file.</span> |
| <span class="source-line-no">691</span><span id="line-691"> return -1;</span> |
| <span class="source-line-no">692</span><span id="line-692"> }</span> |
| <span class="source-line-no">693</span><span id="line-693"> return loadBlockAndSeekToKey(blockWithScanInfo.getHFileBlock(),</span> |
| <span class="source-line-no">694</span><span id="line-694"> blockWithScanInfo.getNextIndexedKey(), rewind, key, false);</span> |
| <span class="source-line-no">695</span><span id="line-695"> }</span> |
| <span class="source-line-no">696</span><span id="line-696"></span> |
| <span class="source-line-no">697</span><span id="line-697"> @Override</span> |
| <span class="source-line-no">698</span><span id="line-698"> public boolean seekBefore(ExtendedCell key) throws IOException {</span> |
| <span class="source-line-no">699</span><span id="line-699"> HFileBlock seekToBlock = reader.getDataBlockIndexReader().seekToDataBlock(key, curBlock,</span> |
| <span class="source-line-no">700</span><span id="line-700"> cacheBlocks, pread, isCompaction, reader.getEffectiveEncodingInCache(isCompaction), reader);</span> |
| <span class="source-line-no">701</span><span id="line-701"> if (seekToBlock == null) {</span> |
| <span class="source-line-no">702</span><span id="line-702"> return false;</span> |
| <span class="source-line-no">703</span><span id="line-703"> }</span> |
| <span class="source-line-no">704</span><span id="line-704"> ExtendedCell firstKey = getFirstKeyCellInBlock(seekToBlock);</span> |
| <span class="source-line-no">705</span><span id="line-705"> if (PrivateCellUtil.compareKeyIgnoresMvcc(reader.getComparator(), firstKey, key) >= 0) {</span> |
| <span class="source-line-no">706</span><span id="line-706"> long previousBlockOffset = seekToBlock.getPrevBlockOffset();</span> |
| <span class="source-line-no">707</span><span id="line-707"> // The key we are interested in</span> |
| <span class="source-line-no">708</span><span id="line-708"> if (previousBlockOffset == -1) {</span> |
| <span class="source-line-no">709</span><span id="line-709"> // we have a 'problem', the key we want is the first of the file.</span> |
| <span class="source-line-no">710</span><span id="line-710"> releaseIfNotCurBlock(seekToBlock);</span> |
| <span class="source-line-no">711</span><span id="line-711"> return false;</span> |
| <span class="source-line-no">712</span><span id="line-712"> }</span> |
| <span class="source-line-no">713</span><span id="line-713"></span> |
| <span class="source-line-no">714</span><span id="line-714"> // The first key in the current block 'seekToBlock' is greater than the given</span> |
| <span class="source-line-no">715</span><span id="line-715"> // seekBefore key. We will go ahead by reading the next block that satisfies the</span> |
| <span class="source-line-no">716</span><span id="line-716"> // given key. Return the current block before reading the next one.</span> |
| <span class="source-line-no">717</span><span id="line-717"> releaseIfNotCurBlock(seekToBlock);</span> |
| <span class="source-line-no">718</span><span id="line-718"> // It is important that we compute and pass onDiskSize to the block</span> |
| <span class="source-line-no">719</span><span id="line-719"> // reader so that it does not have to read the header separately to</span> |
| <span class="source-line-no">720</span><span id="line-720"> // figure out the size. Currently, we do not have a way to do this</span> |
| <span class="source-line-no">721</span><span id="line-721"> // correctly in the general case however.</span> |
| <span class="source-line-no">722</span><span id="line-722"> // TODO: See https://issues.apache.org/jira/browse/HBASE-14576</span> |
| <span class="source-line-no">723</span><span id="line-723"> int prevBlockSize = -1;</span> |
| <span class="source-line-no">724</span><span id="line-724"> seekToBlock = reader.readBlock(previousBlockOffset, prevBlockSize, cacheBlocks, pread,</span> |
| <span class="source-line-no">725</span><span id="line-725"> isCompaction, true, BlockType.DATA, getEffectiveDataBlockEncoding());</span> |
| <span class="source-line-no">726</span><span id="line-726"> // TODO shortcut: seek forward in this block to the last key of the</span> |
| <span class="source-line-no">727</span><span id="line-727"> // block.</span> |
| <span class="source-line-no">728</span><span id="line-728"> }</span> |
| <span class="source-line-no">729</span><span id="line-729"> loadBlockAndSeekToKey(seekToBlock, firstKey, true, key, true);</span> |
| <span class="source-line-no">730</span><span id="line-730"> return true;</span> |
| <span class="source-line-no">731</span><span id="line-731"> }</span> |
| <span class="source-line-no">732</span><span id="line-732"></span> |
| <span class="source-line-no">733</span><span id="line-733"> /**</span> |
| <span class="source-line-no">734</span><span id="line-734"> * The curBlock will be released by shipping or close method, so only need to consider releasing</span> |
| <span class="source-line-no">735</span><span id="line-735"> * the block, which was read from HFile before and not referenced by curBlock.</span> |
| <span class="source-line-no">736</span><span id="line-736"> */</span> |
| <span class="source-line-no">737</span><span id="line-737"> protected void releaseIfNotCurBlock(HFileBlock block) {</span> |
| <span class="source-line-no">738</span><span id="line-738"> if (curBlock != block) {</span> |
| <span class="source-line-no">739</span><span id="line-739"> block.release();</span> |
| <span class="source-line-no">740</span><span id="line-740"> }</span> |
| <span class="source-line-no">741</span><span id="line-741"> }</span> |
| <span class="source-line-no">742</span><span id="line-742"></span> |
| <span class="source-line-no">743</span><span id="line-743"> /**</span> |
| <span class="source-line-no">744</span><span id="line-744"> * Scans blocks in the "scanned" section of the {@link HFile} until the next data block is</span> |
| <span class="source-line-no">745</span><span id="line-745"> * found.</span> |
| <span class="source-line-no">746</span><span id="line-746"> * @return the next block, or null if there are no more data blocks</span> |
| <span class="source-line-no">747</span><span id="line-747"> */</span> |
| <span class="source-line-no">748</span><span id="line-748"> @edu.umd.cs.findbugs.annotations.SuppressWarnings(value = "NP_NULL_ON_SOME_PATH",</span> |
| <span class="source-line-no">749</span><span id="line-749"> justification = "Yeah, unnecessary null check; could do w/ clean up")</span> |
| <span class="source-line-no">750</span><span id="line-750"> protected HFileBlock readNextDataBlock() throws IOException {</span> |
| <span class="source-line-no">751</span><span id="line-751"> long lastDataBlockOffset = reader.getTrailer().getLastDataBlockOffset();</span> |
| <span class="source-line-no">752</span><span id="line-752"> if (curBlock == null) {</span> |
| <span class="source-line-no">753</span><span id="line-753"> return null;</span> |
| <span class="source-line-no">754</span><span id="line-754"> }</span> |
| <span class="source-line-no">755</span><span id="line-755"> HFileBlock block = this.curBlock;</span> |
| <span class="source-line-no">756</span><span id="line-756"> do {</span> |
| <span class="source-line-no">757</span><span id="line-757"> if (block.getOffset() >= lastDataBlockOffset) {</span> |
| <span class="source-line-no">758</span><span id="line-758"> releaseIfNotCurBlock(block);</span> |
| <span class="source-line-no">759</span><span id="line-759"> return null;</span> |
| <span class="source-line-no">760</span><span id="line-760"> }</span> |
| <span class="source-line-no">761</span><span id="line-761"> if (block.getOffset() < 0) {</span> |
| <span class="source-line-no">762</span><span id="line-762"> releaseIfNotCurBlock(block);</span> |
| <span class="source-line-no">763</span><span id="line-763"> throw new IOException("Invalid block offset: " + block + ", path=" + reader.getPath());</span> |
| <span class="source-line-no">764</span><span id="line-764"> }</span> |
| <span class="source-line-no">765</span><span id="line-765"> // We are reading the next block without block type validation, because</span> |
| <span class="source-line-no">766</span><span id="line-766"> // it might turn out to be a non-data block.</span> |
| <span class="source-line-no">767</span><span id="line-767"> block = reader.readBlock(block.getOffset() + block.getOnDiskSizeWithHeader(),</span> |
| <span class="source-line-no">768</span><span id="line-768"> block.getNextBlockOnDiskSize(), cacheBlocks, pread, isCompaction, true, null,</span> |
| <span class="source-line-no">769</span><span id="line-769"> getEffectiveDataBlockEncoding());</span> |
| <span class="source-line-no">770</span><span id="line-770"> if (block != null && !block.getBlockType().isData()) {</span> |
| <span class="source-line-no">771</span><span id="line-771"> // Whatever block we read we will be returning it unless</span> |
| <span class="source-line-no">772</span><span id="line-772"> // it is a datablock. Just in case the blocks are non data blocks</span> |
| <span class="source-line-no">773</span><span id="line-773"> block.release();</span> |
| <span class="source-line-no">774</span><span id="line-774"> }</span> |
| <span class="source-line-no">775</span><span id="line-775"> } while (!block.getBlockType().isData());</span> |
| <span class="source-line-no">776</span><span id="line-776"> return block;</span> |
| <span class="source-line-no">777</span><span id="line-777"> }</span> |
| <span class="source-line-no">778</span><span id="line-778"></span> |
| <span class="source-line-no">779</span><span id="line-779"> public DataBlockEncoding getEffectiveDataBlockEncoding() {</span> |
| <span class="source-line-no">780</span><span id="line-780"> return this.reader.getEffectiveEncodingInCache(isCompaction);</span> |
| <span class="source-line-no">781</span><span id="line-781"> }</span> |
| <span class="source-line-no">782</span><span id="line-782"></span> |
| <span class="source-line-no">783</span><span id="line-783"> @Override</span> |
| <span class="source-line-no">784</span><span id="line-784"> public ExtendedCell getCell() {</span> |
| <span class="source-line-no">785</span><span id="line-785"> if (!isSeeked()) {</span> |
| <span class="source-line-no">786</span><span id="line-786"> return null;</span> |
| <span class="source-line-no">787</span><span id="line-787"> }</span> |
| <span class="source-line-no">788</span><span id="line-788"></span> |
| <span class="source-line-no">789</span><span id="line-789"> ExtendedCell ret;</span> |
| <span class="source-line-no">790</span><span id="line-790"> int cellBufSize = getKVBufSize();</span> |
| <span class="source-line-no">791</span><span id="line-791"> long seqId = 0L;</span> |
| <span class="source-line-no">792</span><span id="line-792"> if (this.reader.getHFileInfo().shouldIncludeMemStoreTS()) {</span> |
| <span class="source-line-no">793</span><span id="line-793"> seqId = currMemstoreTS;</span> |
| <span class="source-line-no">794</span><span id="line-794"> }</span> |
| <span class="source-line-no">795</span><span id="line-795"> if (blockBuffer.hasArray()) {</span> |
| <span class="source-line-no">796</span><span id="line-796"> // TODO : reduce the varieties of KV here. Check if based on a boolean</span> |
| <span class="source-line-no">797</span><span id="line-797"> // we can handle the 'no tags' case.</span> |
| <span class="source-line-no">798</span><span id="line-798"> if (currTagsLen > 0) {</span> |
| <span class="source-line-no">799</span><span id="line-799"> ret = new SizeCachedKeyValue(blockBuffer.array(),</span> |
| <span class="source-line-no">800</span><span id="line-800"> blockBuffer.arrayOffset() + blockBuffer.position(), cellBufSize, seqId, currKeyLen,</span> |
| <span class="source-line-no">801</span><span id="line-801"> rowLen);</span> |
| <span class="source-line-no">802</span><span id="line-802"> } else {</span> |
| <span class="source-line-no">803</span><span id="line-803"> ret = new SizeCachedNoTagsKeyValue(blockBuffer.array(),</span> |
| <span class="source-line-no">804</span><span id="line-804"> blockBuffer.arrayOffset() + blockBuffer.position(), cellBufSize, seqId, currKeyLen,</span> |
| <span class="source-line-no">805</span><span id="line-805"> rowLen);</span> |
| <span class="source-line-no">806</span><span id="line-806"> }</span> |
| <span class="source-line-no">807</span><span id="line-807"> } else {</span> |
| <span class="source-line-no">808</span><span id="line-808"> ByteBuffer buf = blockBuffer.asSubByteBuffer(cellBufSize);</span> |
| <span class="source-line-no">809</span><span id="line-809"> if (buf.isDirect()) {</span> |
| <span class="source-line-no">810</span><span id="line-810"> ret = currTagsLen > 0</span> |
| <span class="source-line-no">811</span><span id="line-811"> ? new SizeCachedByteBufferKeyValue(buf, buf.position(), cellBufSize, seqId, currKeyLen,</span> |
| <span class="source-line-no">812</span><span id="line-812"> rowLen)</span> |
| <span class="source-line-no">813</span><span id="line-813"> : new SizeCachedNoTagsByteBufferKeyValue(buf, buf.position(), cellBufSize, seqId,</span> |
| <span class="source-line-no">814</span><span id="line-814"> currKeyLen, rowLen);</span> |
| <span class="source-line-no">815</span><span id="line-815"> } else {</span> |
| <span class="source-line-no">816</span><span id="line-816"> if (currTagsLen > 0) {</span> |
| <span class="source-line-no">817</span><span id="line-817"> ret = new SizeCachedKeyValue(buf.array(), buf.arrayOffset() + buf.position(),</span> |
| <span class="source-line-no">818</span><span id="line-818"> cellBufSize, seqId, currKeyLen, rowLen);</span> |
| <span class="source-line-no">819</span><span id="line-819"> } else {</span> |
| <span class="source-line-no">820</span><span id="line-820"> ret = new SizeCachedNoTagsKeyValue(buf.array(), buf.arrayOffset() + buf.position(),</span> |
| <span class="source-line-no">821</span><span id="line-821"> cellBufSize, seqId, currKeyLen, rowLen);</span> |
| <span class="source-line-no">822</span><span id="line-822"> }</span> |
| <span class="source-line-no">823</span><span id="line-823"> }</span> |
| <span class="source-line-no">824</span><span id="line-824"> }</span> |
| <span class="source-line-no">825</span><span id="line-825"> return ret;</span> |
| <span class="source-line-no">826</span><span id="line-826"> }</span> |
| <span class="source-line-no">827</span><span id="line-827"></span> |
| <span class="source-line-no">828</span><span id="line-828"> @Override</span> |
| <span class="source-line-no">829</span><span id="line-829"> public ExtendedCell getKey() {</span> |
| <span class="source-line-no">830</span><span id="line-830"> assertSeeked();</span> |
| <span class="source-line-no">831</span><span id="line-831"> // Create a new object so that this getKey is cached as firstKey, lastKey</span> |
| <span class="source-line-no">832</span><span id="line-832"> ObjectIntPair<ByteBuffer> keyPair = new ObjectIntPair<>();</span> |
| <span class="source-line-no">833</span><span id="line-833"> blockBuffer.asSubByteBuffer(blockBuffer.position() + KEY_VALUE_LEN_SIZE, currKeyLen, keyPair);</span> |
| <span class="source-line-no">834</span><span id="line-834"> ByteBuffer keyBuf = keyPair.getFirst();</span> |
| <span class="source-line-no">835</span><span id="line-835"> if (keyBuf.hasArray()) {</span> |
| <span class="source-line-no">836</span><span id="line-836"> return new KeyValue.KeyOnlyKeyValue(keyBuf.array(),</span> |
| <span class="source-line-no">837</span><span id="line-837"> keyBuf.arrayOffset() + keyPair.getSecond(), currKeyLen);</span> |
| <span class="source-line-no">838</span><span id="line-838"> } else {</span> |
| <span class="source-line-no">839</span><span id="line-839"> // Better to do a copy here instead of holding on to this BB so that</span> |
| <span class="source-line-no">840</span><span id="line-840"> // we could release the blocks referring to this key. This key is specifically used</span> |
| <span class="source-line-no">841</span><span id="line-841"> // in HalfStoreFileReader to get the firstkey and lastkey by creating a new scanner</span> |
| <span class="source-line-no">842</span><span id="line-842"> // every time. So holding onto the BB (incase of DBB) is not advised here.</span> |
| <span class="source-line-no">843</span><span id="line-843"> byte[] key = new byte[currKeyLen];</span> |
| <span class="source-line-no">844</span><span id="line-844"> ByteBufferUtils.copyFromBufferToArray(key, keyBuf, keyPair.getSecond(), 0, currKeyLen);</span> |
| <span class="source-line-no">845</span><span id="line-845"> return new KeyValue.KeyOnlyKeyValue(key, 0, currKeyLen);</span> |
| <span class="source-line-no">846</span><span id="line-846"> }</span> |
| <span class="source-line-no">847</span><span id="line-847"> }</span> |
| <span class="source-line-no">848</span><span id="line-848"></span> |
| <span class="source-line-no">849</span><span id="line-849"> @Override</span> |
| <span class="source-line-no">850</span><span id="line-850"> public ByteBuffer getValue() {</span> |
| <span class="source-line-no">851</span><span id="line-851"> assertSeeked();</span> |
| <span class="source-line-no">852</span><span id="line-852"> // Okie to create new Pair. Not used in hot path</span> |
| <span class="source-line-no">853</span><span id="line-853"> ObjectIntPair<ByteBuffer> valuePair = new ObjectIntPair<>();</span> |
| <span class="source-line-no">854</span><span id="line-854"> this.blockBuffer.asSubByteBuffer(blockBuffer.position() + KEY_VALUE_LEN_SIZE + currKeyLen,</span> |
| <span class="source-line-no">855</span><span id="line-855"> currValueLen, valuePair);</span> |
| <span class="source-line-no">856</span><span id="line-856"> ByteBuffer valBuf = valuePair.getFirst().duplicate();</span> |
| <span class="source-line-no">857</span><span id="line-857"> valBuf.position(valuePair.getSecond());</span> |
| <span class="source-line-no">858</span><span id="line-858"> valBuf.limit(currValueLen + valuePair.getSecond());</span> |
| <span class="source-line-no">859</span><span id="line-859"> return valBuf.slice();</span> |
| <span class="source-line-no">860</span><span id="line-860"> }</span> |
| <span class="source-line-no">861</span><span id="line-861"></span> |
| <span class="source-line-no">862</span><span id="line-862"> protected void setNonSeekedState() {</span> |
| <span class="source-line-no">863</span><span id="line-863"> reset();</span> |
| <span class="source-line-no">864</span><span id="line-864"> blockBuffer = null;</span> |
| <span class="source-line-no">865</span><span id="line-865"> currKeyLen = 0;</span> |
| <span class="source-line-no">866</span><span id="line-866"> currValueLen = 0;</span> |
| <span class="source-line-no">867</span><span id="line-867"> currMemstoreTS = 0;</span> |
| <span class="source-line-no">868</span><span id="line-868"> currMemstoreTSLen = 0;</span> |
| <span class="source-line-no">869</span><span id="line-869"> currTagsLen = 0;</span> |
| <span class="source-line-no">870</span><span id="line-870"> }</span> |
| <span class="source-line-no">871</span><span id="line-871"></span> |
| <span class="source-line-no">872</span><span id="line-872"> /**</span> |
| <span class="source-line-no">873</span><span id="line-873"> * Set the position on current backing blockBuffer.</span> |
| <span class="source-line-no">874</span><span id="line-874"> */</span> |
| <span class="source-line-no">875</span><span id="line-875"> private void positionThisBlockBuffer() {</span> |
| <span class="source-line-no">876</span><span id="line-876"> try {</span> |
| <span class="source-line-no">877</span><span id="line-877"> blockBuffer.skip(getCurCellSerializedSize());</span> |
| <span class="source-line-no">878</span><span id="line-878"> } catch (IllegalArgumentException e) {</span> |
| <span class="source-line-no">879</span><span id="line-879"> LOG.error("Current pos = " + blockBuffer.position() + "; currKeyLen = " + currKeyLen</span> |
| <span class="source-line-no">880</span><span id="line-880"> + "; currValLen = " + currValueLen + "; block limit = " + blockBuffer.limit()</span> |
| <span class="source-line-no">881</span><span id="line-881"> + "; currBlock currBlockOffset = " + this.curBlock.getOffset() + "; path="</span> |
| <span class="source-line-no">882</span><span id="line-882"> + reader.getPath());</span> |
| <span class="source-line-no">883</span><span id="line-883"> throw e;</span> |
| <span class="source-line-no">884</span><span id="line-884"> }</span> |
| <span class="source-line-no">885</span><span id="line-885"> }</span> |
| <span class="source-line-no">886</span><span id="line-886"></span> |
| <span class="source-line-no">887</span><span id="line-887"> /**</span> |
| <span class="source-line-no">888</span><span id="line-888"> * Set our selves up for the next 'next' invocation, set up next block.</span> |
| <span class="source-line-no">889</span><span id="line-889"> * @return True is more to read else false if at the end.</span> |
| <span class="source-line-no">890</span><span id="line-890"> */</span> |
| <span class="source-line-no">891</span><span id="line-891"> private boolean positionForNextBlock() throws IOException {</span> |
| <span class="source-line-no">892</span><span id="line-892"> // Methods are small so they get inlined because they are 'hot'.</span> |
| <span class="source-line-no">893</span><span id="line-893"> long lastDataBlockOffset = reader.getTrailer().getLastDataBlockOffset();</span> |
| <span class="source-line-no">894</span><span id="line-894"> if (this.curBlock.getOffset() >= lastDataBlockOffset) {</span> |
| <span class="source-line-no">895</span><span id="line-895"> setNonSeekedState();</span> |
| <span class="source-line-no">896</span><span id="line-896"> return false;</span> |
| <span class="source-line-no">897</span><span id="line-897"> }</span> |
| <span class="source-line-no">898</span><span id="line-898"> return isNextBlock();</span> |
| <span class="source-line-no">899</span><span id="line-899"> }</span> |
| <span class="source-line-no">900</span><span id="line-900"></span> |
| <span class="source-line-no">901</span><span id="line-901"> private boolean isNextBlock() throws IOException {</span> |
| <span class="source-line-no">902</span><span id="line-902"> // Methods are small so they get inlined because they are 'hot'.</span> |
| <span class="source-line-no">903</span><span id="line-903"> HFileBlock nextBlock = readNextDataBlock();</span> |
| <span class="source-line-no">904</span><span id="line-904"> if (nextBlock == null) {</span> |
| <span class="source-line-no">905</span><span id="line-905"> setNonSeekedState();</span> |
| <span class="source-line-no">906</span><span id="line-906"> return false;</span> |
| <span class="source-line-no">907</span><span id="line-907"> }</span> |
| <span class="source-line-no">908</span><span id="line-908"> updateCurrentBlock(nextBlock);</span> |
| <span class="source-line-no">909</span><span id="line-909"> return true;</span> |
| <span class="source-line-no">910</span><span id="line-910"> }</span> |
| <span class="source-line-no">911</span><span id="line-911"></span> |
| <span class="source-line-no">912</span><span id="line-912"> private final boolean _next() throws IOException {</span> |
| <span class="source-line-no">913</span><span id="line-913"> // Small method so can be inlined. It is a hot one.</span> |
| <span class="source-line-no">914</span><span id="line-914"> if (blockBuffer.remaining() <= 0) {</span> |
| <span class="source-line-no">915</span><span id="line-915"> return positionForNextBlock();</span> |
| <span class="source-line-no">916</span><span id="line-916"> }</span> |
| <span class="source-line-no">917</span><span id="line-917"></span> |
| <span class="source-line-no">918</span><span id="line-918"> // We are still in the same block.</span> |
| <span class="source-line-no">919</span><span id="line-919"> readKeyValueLen();</span> |
| <span class="source-line-no">920</span><span id="line-920"> return true;</span> |
| <span class="source-line-no">921</span><span id="line-921"> }</span> |
| <span class="source-line-no">922</span><span id="line-922"></span> |
| <span class="source-line-no">923</span><span id="line-923"> /**</span> |
| <span class="source-line-no">924</span><span id="line-924"> * Go to the next key/value in the block section. Loads the next block if necessary. If</span> |
| <span class="source-line-no">925</span><span id="line-925"> * successful, {@link #getKey()} and {@link #getValue()} can be called.</span> |
| <span class="source-line-no">926</span><span id="line-926"> * @return true if successfully navigated to the next key/value</span> |
| <span class="source-line-no">927</span><span id="line-927"> */</span> |
| <span class="source-line-no">928</span><span id="line-928"> @Override</span> |
| <span class="source-line-no">929</span><span id="line-929"> public boolean next() throws IOException {</span> |
| <span class="source-line-no">930</span><span id="line-930"> // This is a hot method so extreme measures taken to ensure it is small and inlineable.</span> |
| <span class="source-line-no">931</span><span id="line-931"> // Checked by setting: -XX:+UnlockDiagnosticVMOptions -XX:+PrintInlining -XX:+PrintCompilation</span> |
| <span class="source-line-no">932</span><span id="line-932"> assertSeeked();</span> |
| <span class="source-line-no">933</span><span id="line-933"> positionThisBlockBuffer();</span> |
| <span class="source-line-no">934</span><span id="line-934"> return _next();</span> |
| <span class="source-line-no">935</span><span id="line-935"> }</span> |
| <span class="source-line-no">936</span><span id="line-936"></span> |
| <span class="source-line-no">937</span><span id="line-937"> /**</span> |
| <span class="source-line-no">938</span><span id="line-938"> * Positions this scanner at the start of the file.</span> |
| <span class="source-line-no">939</span><span id="line-939"> * @return false if empty file; i.e. a call to next would return false and the current key and</span> |
| <span class="source-line-no">940</span><span id="line-940"> * value are undefined.</span> |
| <span class="source-line-no">941</span><span id="line-941"> */</span> |
| <span class="source-line-no">942</span><span id="line-942"> @Override</span> |
| <span class="source-line-no">943</span><span id="line-943"> public boolean seekTo() throws IOException {</span> |
| <span class="source-line-no">944</span><span id="line-944"> if (reader == null) {</span> |
| <span class="source-line-no">945</span><span id="line-945"> return false;</span> |
| <span class="source-line-no">946</span><span id="line-946"> }</span> |
| <span class="source-line-no">947</span><span id="line-947"></span> |
| <span class="source-line-no">948</span><span id="line-948"> if (reader.getTrailer().getEntryCount() == 0) {</span> |
| <span class="source-line-no">949</span><span id="line-949"> // No data blocks.</span> |
| <span class="source-line-no">950</span><span id="line-950"> return false;</span> |
| <span class="source-line-no">951</span><span id="line-951"> }</span> |
| <span class="source-line-no">952</span><span id="line-952"></span> |
| <span class="source-line-no">953</span><span id="line-953"> long firstDataBlockOffset = reader.getTrailer().getFirstDataBlockOffset();</span> |
| <span class="source-line-no">954</span><span id="line-954"> if (curBlock != null && curBlock.getOffset() == firstDataBlockOffset) {</span> |
| <span class="source-line-no">955</span><span id="line-955"> return processFirstDataBlock();</span> |
| <span class="source-line-no">956</span><span id="line-956"> }</span> |
| <span class="source-line-no">957</span><span id="line-957"></span> |
| <span class="source-line-no">958</span><span id="line-958"> readAndUpdateNewBlock(firstDataBlockOffset);</span> |
| <span class="source-line-no">959</span><span id="line-959"> return true;</span> |
| <span class="source-line-no">960</span><span id="line-960"> }</span> |
| <span class="source-line-no">961</span><span id="line-961"></span> |
| <span class="source-line-no">962</span><span id="line-962"> protected boolean processFirstDataBlock() throws IOException {</span> |
| <span class="source-line-no">963</span><span id="line-963"> blockBuffer.rewind();</span> |
| <span class="source-line-no">964</span><span id="line-964"> readKeyValueLen();</span> |
| <span class="source-line-no">965</span><span id="line-965"> return true;</span> |
| <span class="source-line-no">966</span><span id="line-966"> }</span> |
| <span class="source-line-no">967</span><span id="line-967"></span> |
| <span class="source-line-no">968</span><span id="line-968"> protected void readAndUpdateNewBlock(long firstDataBlockOffset) throws IOException {</span> |
| <span class="source-line-no">969</span><span id="line-969"> HFileBlock newBlock = reader.readBlock(firstDataBlockOffset, -1, cacheBlocks, pread,</span> |
| <span class="source-line-no">970</span><span id="line-970"> isCompaction, true, BlockType.DATA, getEffectiveDataBlockEncoding());</span> |
| <span class="source-line-no">971</span><span id="line-971"> if (newBlock.getOffset() < 0) {</span> |
| <span class="source-line-no">972</span><span id="line-972"> releaseIfNotCurBlock(newBlock);</span> |
| <span class="source-line-no">973</span><span id="line-973"> throw new IOException(</span> |
| <span class="source-line-no">974</span><span id="line-974"> "Invalid offset=" + newBlock.getOffset() + ", path=" + reader.getPath());</span> |
| <span class="source-line-no">975</span><span id="line-975"> }</span> |
| <span class="source-line-no">976</span><span id="line-976"> updateCurrentBlock(newBlock);</span> |
| <span class="source-line-no">977</span><span id="line-977"> }</span> |
| <span class="source-line-no">978</span><span id="line-978"></span> |
| <span class="source-line-no">979</span><span id="line-979"> protected int loadBlockAndSeekToKey(HFileBlock seekToBlock, ExtendedCell nextIndexedKey,</span> |
| <span class="source-line-no">980</span><span id="line-980"> boolean rewind, ExtendedCell key, boolean seekBefore) throws IOException {</span> |
| <span class="source-line-no">981</span><span id="line-981"> if (this.curBlock == null || this.curBlock.getOffset() != seekToBlock.getOffset()) {</span> |
| <span class="source-line-no">982</span><span id="line-982"> updateCurrentBlock(seekToBlock);</span> |
| <span class="source-line-no">983</span><span id="line-983"> } else if (rewind) {</span> |
| <span class="source-line-no">984</span><span id="line-984"> blockBuffer.rewind();</span> |
| <span class="source-line-no">985</span><span id="line-985"> }</span> |
| <span class="source-line-no">986</span><span id="line-986"> // Update the nextIndexedKey</span> |
| <span class="source-line-no">987</span><span id="line-987"> this.nextIndexedKey = nextIndexedKey;</span> |
| <span class="source-line-no">988</span><span id="line-988"> return blockSeek(key, seekBefore);</span> |
| <span class="source-line-no">989</span><span id="line-989"> }</span> |
| <span class="source-line-no">990</span><span id="line-990"></span> |
| <span class="source-line-no">991</span><span id="line-991"> /** Returns True if v &lt;= 0 or v &gt; current block buffer limit. */</span> |
| <span class="source-line-no">992</span><span id="line-992"> protected final boolean checkKeyLen(final int v) {</span> |
| <span class="source-line-no">993</span><span id="line-993"> return v <= 0 || v > this.blockBuffer.limit();</span> |
| <span class="source-line-no">994</span><span id="line-994"> }</span> |
| <span class="source-line-no">995</span><span id="line-995"></span> |
| <span class="source-line-no">996</span><span id="line-996"> /** Returns True if v &lt; 0 or v &gt; current block buffer limit. */</span> |
| <span class="source-line-no">997</span><span id="line-997"> protected final boolean checkLen(final int v) {</span> |
| <span class="source-line-no">998</span><span id="line-998"> return v < 0 || v > this.blockBuffer.limit();</span> |
| <span class="source-line-no">999</span><span id="line-999"> }</span> |
| <span class="source-line-no">1000</span><span id="line-1000"></span> |
| <span class="source-line-no">1001</span><span id="line-1001"> /**</span> |
| <span class="source-line-no">1002</span><span id="line-1002"> * Check key and value lengths are wholesome.</span> |
| <span class="source-line-no">1003</span><span id="line-1003"> */</span> |
| <span class="source-line-no">1004</span><span id="line-1004"> protected final void checkKeyValueLen() {</span> |
| <span class="source-line-no">1005</span><span id="line-1005"> if (checkKeyLen(this.currKeyLen) || checkLen(this.currValueLen)) {</span> |
| <span class="source-line-no">1006</span><span id="line-1006"> throw new IllegalStateException("Invalid currKeyLen " + this.currKeyLen</span> |
| <span class="source-line-no">1007</span><span id="line-1007"> + " or currValueLen " + this.currValueLen + ". Block offset: " + this.curBlock.getOffset()</span> |
| <span class="source-line-no">1008</span><span id="line-1008"> + ", block length: " + this.blockBuffer.limit() + ", position: "</span> |
| <span class="source-line-no">1009</span><span id="line-1009"> + this.blockBuffer.position() + " (without header)." + ", path=" + reader.getPath());</span> |
| <span class="source-line-no">1010</span><span id="line-1010"> }</span> |
| <span class="source-line-no">1011</span><span id="line-1011"> }</span> |
| <span class="source-line-no">1012</span><span id="line-1012"></span> |
| <span class="source-line-no">1013</span><span id="line-1013"> /**</span> |
| <span class="source-line-no">1014</span><span id="line-1014"> * Updates the current block to be the given {@link HFileBlock}. Seeks to the the first</span> |
| <span class="source-line-no">1015</span><span id="line-1015"> * key/value pair.</span> |
| <span class="source-line-no">1016</span><span id="line-1016"> * @param newBlock the block read by {@link HFileReaderImpl#readBlock}, it's a totally new block</span> |
| <span class="source-line-no">1017</span><span id="line-1017"> * with new allocated {@link ByteBuff}, so if no further reference to this</span> |
| <span class="source-line-no">1018</span><span id="line-1018"> * block, we should release it carefully.</span> |
| <span class="source-line-no">1019</span><span id="line-1019"> */</span> |
| <span class="source-line-no">1020</span><span id="line-1020"> protected void updateCurrentBlock(HFileBlock newBlock) throws IOException {</span> |
| <span class="source-line-no">1021</span><span id="line-1021"> try {</span> |
| <span class="source-line-no">1022</span><span id="line-1022"> if (newBlock.getBlockType() != BlockType.DATA) {</span> |
| <span class="source-line-no">1023</span><span id="line-1023"> throw new IllegalStateException(</span> |
| <span class="source-line-no">1024</span><span id="line-1024"> "ScannerV2 works only on data blocks, got " + newBlock.getBlockType() + "; "</span> |
| <span class="source-line-no">1025</span><span id="line-1025"> + "HFileName=" + reader.getPath() + ", " + "dataBlockEncoder="</span> |
| <span class="source-line-no">1026</span><span id="line-1026"> + reader.getDataBlockEncoding() + ", " + "isCompaction=" + isCompaction);</span> |
| <span class="source-line-no">1027</span><span id="line-1027"> }</span> |
| <span class="source-line-no">1028</span><span id="line-1028"> updateCurrBlockRef(newBlock);</span> |
| <span class="source-line-no">1029</span><span id="line-1029"> blockBuffer = newBlock.getBufferWithoutHeader();</span> |
| <span class="source-line-no">1030</span><span id="line-1030"> readKeyValueLen();</span> |
| <span class="source-line-no">1031</span><span id="line-1031"> } finally {</span> |
| <span class="source-line-no">1032</span><span id="line-1032"> releaseIfNotCurBlock(newBlock);</span> |
| <span class="source-line-no">1033</span><span id="line-1033"> }</span> |
| <span class="source-line-no">1034</span><span id="line-1034"> // Reset the next indexed key</span> |
| <span class="source-line-no">1035</span><span id="line-1035"> this.nextIndexedKey = null;</span> |
| <span class="source-line-no">1036</span><span id="line-1036"> }</span> |
| <span class="source-line-no">1037</span><span id="line-1037"></span> |
| <span class="source-line-no">1038</span><span id="line-1038"> protected ExtendedCell getFirstKeyCellInBlock(HFileBlock curBlock) {</span> |
| <span class="source-line-no">1039</span><span id="line-1039"> ByteBuff buffer = curBlock.getBufferWithoutHeader();</span> |
| <span class="source-line-no">1040</span><span id="line-1040"> // It is safe to manipulate this buffer because we own the buffer object.</span> |
| <span class="source-line-no">1041</span><span id="line-1041"> buffer.rewind();</span> |
| <span class="source-line-no">1042</span><span id="line-1042"> int klen = buffer.getInt();</span> |
| <span class="source-line-no">1043</span><span id="line-1043"> buffer.skip(Bytes.SIZEOF_INT);// Skip value len part</span> |
| <span class="source-line-no">1044</span><span id="line-1044"> ByteBuffer keyBuff = buffer.asSubByteBuffer(klen);</span> |
| <span class="source-line-no">1045</span><span id="line-1045"> if (keyBuff.hasArray()) {</span> |
| <span class="source-line-no">1046</span><span id="line-1046"> return new KeyValue.KeyOnlyKeyValue(keyBuff.array(),</span> |
| <span class="source-line-no">1047</span><span id="line-1047"> keyBuff.arrayOffset() + keyBuff.position(), klen);</span> |
| <span class="source-line-no">1048</span><span id="line-1048"> } else {</span> |
| <span class="source-line-no">1049</span><span id="line-1049"> return new ByteBufferKeyOnlyKeyValue(keyBuff, keyBuff.position(), klen);</span> |
| <span class="source-line-no">1050</span><span id="line-1050"> }</span> |
| <span class="source-line-no">1051</span><span id="line-1051"> }</span> |
| <span class="source-line-no">1052</span><span id="line-1052"></span> |
| <span class="source-line-no">1053</span><span id="line-1053"> public int compareKey(CellComparator comparator, ExtendedCell key) {</span> |
| <span class="source-line-no">1054</span><span id="line-1054"> blockBuffer.asSubByteBuffer(blockBuffer.position() + KEY_VALUE_LEN_SIZE, currKeyLen, pair);</span> |
| <span class="source-line-no">1055</span><span id="line-1055"> this.bufBackedKeyOnlyKv.setKey(pair.getFirst(), pair.getSecond(), currKeyLen, rowLen);</span> |
| <span class="source-line-no">1056</span><span id="line-1056"> return PrivateCellUtil.compareKeyIgnoresMvcc(comparator, key, this.bufBackedKeyOnlyKv);</span> |
| <span class="source-line-no">1057</span><span id="line-1057"> }</span> |
| <span class="source-line-no">1058</span><span id="line-1058"></span> |
| <span class="source-line-no">1059</span><span id="line-1059"> @Override</span> |
| <span class="source-line-no">1060</span><span id="line-1060"> public void shipped() throws IOException {</span> |
| <span class="source-line-no">1061</span><span id="line-1061"> this.returnBlocks(false);</span> |
| <span class="source-line-no">1062</span><span id="line-1062"> }</span> |
| <span class="source-line-no">1063</span><span id="line-1063"> }</span> |
| <span class="source-line-no">1064</span><span id="line-1064"></span> |
| <span class="source-line-no">1065</span><span id="line-1065"> @Override</span> |
| <span class="source-line-no">1066</span><span id="line-1066"> public Path getPath() {</span> |
| <span class="source-line-no">1067</span><span id="line-1067"> return path;</span> |
| <span class="source-line-no">1068</span><span id="line-1068"> }</span> |
| <span class="source-line-no">1069</span><span id="line-1069"></span> |
| <span class="source-line-no">1070</span><span id="line-1070"> @Override</span> |
| <span class="source-line-no">1071</span><span id="line-1071"> public DataBlockEncoding getDataBlockEncoding() {</span> |
| <span class="source-line-no">1072</span><span id="line-1072"> return dataBlockEncoder.getDataBlockEncoding();</span> |
| <span class="source-line-no">1073</span><span id="line-1073"> }</span> |
| <span class="source-line-no">1074</span><span id="line-1074"></span> |
| <span class="source-line-no">1075</span><span id="line-1075"> @Override</span> |
| <span class="source-line-no">1076</span><span id="line-1076"> public Configuration getConf() {</span> |
| <span class="source-line-no">1077</span><span id="line-1077"> return conf;</span> |
| <span class="source-line-no">1078</span><span id="line-1078"> }</span> |
| <span class="source-line-no">1079</span><span id="line-1079"></span> |
| <span class="source-line-no">1080</span><span id="line-1080"> @Override</span> |
| <span class="source-line-no">1081</span><span id="line-1081"> public void setConf(Configuration conf) {</span> |
| <span class="source-line-no">1082</span><span id="line-1082"> this.conf = conf;</span> |
| <span class="source-line-no">1083</span><span id="line-1083"> }</span> |
| <span class="source-line-no">1084</span><span id="line-1084"></span> |
| <span class="source-line-no">1085</span><span id="line-1085"> /** Minor versions in HFile starting with this number have hbase checksums */</span> |
| <span class="source-line-no">1086</span><span id="line-1086"> public static final int MINOR_VERSION_WITH_CHECKSUM = 1;</span> |
| <span class="source-line-no">1087</span><span id="line-1087"> /** In HFile minor version that does not support checksums */</span> |
| <span class="source-line-no">1088</span><span id="line-1088"> public static final int MINOR_VERSION_NO_CHECKSUM = 0;</span> |
| <span class="source-line-no">1089</span><span id="line-1089"></span> |
| <span class="source-line-no">1090</span><span id="line-1090"> /** HFile minor version that introduced pbuf filetrailer */</span> |
| <span class="source-line-no">1091</span><span id="line-1091"> public static final int PBUF_TRAILER_MINOR_VERSION = 2;</span> |
| <span class="source-line-no">1092</span><span id="line-1092"></span> |
| <span class="source-line-no">1093</span><span id="line-1093"> /**</span> |
| <span class="source-line-no">1094</span><span id="line-1094"> * The size of a (key length, value length) tuple that prefixes each entry in a data block.</span> |
| <span class="source-line-no">1095</span><span id="line-1095"> */</span> |
| <span class="source-line-no">1096</span><span id="line-1096"> public final static int KEY_VALUE_LEN_SIZE = 2 * Bytes.SIZEOF_INT;</span> |
| <span class="source-line-no">1097</span><span id="line-1097"></span> |
| <span class="source-line-no">1098</span><span id="line-1098"> /**</span> |
| <span class="source-line-no">1099</span><span id="line-1099"> * Retrieve block from cache. Validates the retrieved block's type vs {@code expectedBlockType}</span> |
| <span class="source-line-no">1100</span><span id="line-1100"> * and its encoding vs. {@code expectedDataBlockEncoding}. Unpacks the block as necessary.</span> |
| <span class="source-line-no">1101</span><span id="line-1101"> */</span> |
| <span class="source-line-no">1102</span><span id="line-1102"> @InterfaceAudience.LimitedPrivate(HBaseInterfaceAudience.UNITTEST)</span> |
| <span class="source-line-no">1103</span><span id="line-1103"> public HFileBlock getCachedBlock(BlockCacheKey cacheKey, boolean cacheBlock, boolean useLock,</span> |
| <span class="source-line-no">1104</span><span id="line-1104"> boolean updateCacheMetrics, BlockType expectedBlockType,</span> |
| <span class="source-line-no">1105</span><span id="line-1105"> DataBlockEncoding expectedDataBlockEncoding) throws IOException {</span> |
| <span class="source-line-no">1106</span><span id="line-1106"> // Check cache for block. If found return.</span> |
| <span class="source-line-no">1107</span><span id="line-1107"> BlockCache cache = cacheConf.getBlockCache().orElse(null);</span> |
| <span class="source-line-no">1108</span><span id="line-1108"> long cachedBlockBytesRead = 0;</span> |
| <span class="source-line-no">1109</span><span id="line-1109"> if (cache != null) {</span> |
| <span class="source-line-no">1110</span><span id="line-1110"> HFileBlock cachedBlock = null;</span> |
| <span class="source-line-no">1111</span><span id="line-1111"> boolean isScanMetricsEnabled = ThreadLocalServerSideScanMetrics.isScanMetricsEnabled();</span> |
| <span class="source-line-no">1112</span><span id="line-1112"> try {</span> |
| <span class="source-line-no">1113</span><span id="line-1113"> cachedBlock = (HFileBlock) cache.getBlock(cacheKey, cacheBlock, useLock, updateCacheMetrics,</span> |
| <span class="source-line-no">1114</span><span id="line-1114"> expectedBlockType);</span> |
| <span class="source-line-no">1115</span><span id="line-1115"> if (cachedBlock != null) {</span> |
| <span class="source-line-no">1116</span><span id="line-1116"> if (cacheConf.shouldCacheCompressed(cachedBlock.getBlockType().getCategory())) {</span> |
| <span class="source-line-no">1117</span><span id="line-1117"> HFileBlock compressedBlock = cachedBlock;</span> |
| <span class="source-line-no">1118</span><span id="line-1118"> cachedBlock = compressedBlock.unpack(hfileContext, fsBlockReader);</span> |
| <span class="source-line-no">1119</span><span id="line-1119"> // In case of compressed block after unpacking we can release the compressed block</span> |
| <span class="source-line-no">1120</span><span id="line-1120"> if (compressedBlock != cachedBlock) {</span> |
| <span class="source-line-no">1121</span><span id="line-1121"> compressedBlock.release();</span> |
| <span class="source-line-no">1122</span><span id="line-1122"> }</span> |
| <span class="source-line-no">1123</span><span id="line-1123"> }</span> |
| <span class="source-line-no">1124</span><span id="line-1124"> try {</span> |
| <span class="source-line-no">1125</span><span id="line-1125"> validateBlockType(cachedBlock, expectedBlockType);</span> |
| <span class="source-line-no">1126</span><span id="line-1126"> } catch (IOException e) {</span> |
| <span class="source-line-no">1127</span><span id="line-1127"> returnAndEvictBlock(cache, cacheKey, cachedBlock);</span> |
| <span class="source-line-no">1128</span><span id="line-1128"> cachedBlock = null;</span> |
| <span class="source-line-no">1129</span><span id="line-1129"> throw e;</span> |
| <span class="source-line-no">1130</span><span id="line-1130"> }</span> |
| <span class="source-line-no">1131</span><span id="line-1131"></span> |
| <span class="source-line-no">1132</span><span id="line-1132"> if (expectedDataBlockEncoding == null) {</span> |
| <span class="source-line-no">1133</span><span id="line-1133"> return cachedBlock;</span> |
| <span class="source-line-no">1134</span><span id="line-1134"> }</span> |
| <span class="source-line-no">1135</span><span id="line-1135"> DataBlockEncoding actualDataBlockEncoding = cachedBlock.getDataBlockEncoding();</span> |
| <span class="source-line-no">1136</span><span id="line-1136"> // Block types other than data blocks always have</span> |
| <span class="source-line-no">1137</span><span id="line-1137"> // DataBlockEncoding.NONE. To avoid false negative cache misses, only</span> |
| <span class="source-line-no">1138</span><span id="line-1138"> // perform this check if cached block is a data block.</span> |
| <span class="source-line-no">1139</span><span id="line-1139"> if (</span> |
| <span class="source-line-no">1140</span><span id="line-1140"> cachedBlock.getBlockType().isData()</span> |
| <span class="source-line-no">1141</span><span id="line-1141"> && !actualDataBlockEncoding.equals(expectedDataBlockEncoding)</span> |
| <span class="source-line-no">1142</span><span id="line-1142"> ) {</span> |
| <span class="source-line-no">1143</span><span id="line-1143"> // This mismatch may happen if a Scanner, which is used for say a</span> |
| <span class="source-line-no">1144</span><span id="line-1144"> // compaction, tries to read an encoded block from the block cache.</span> |
| <span class="source-line-no">1145</span><span id="line-1145"> // The reverse might happen when an EncodedScanner tries to read</span> |
| <span class="source-line-no">1146</span><span id="line-1146"> // un-encoded blocks which were cached earlier.</span> |
| <span class="source-line-no">1147</span><span id="line-1147"> //</span> |
| <span class="source-line-no">1148</span><span id="line-1148"> // Because returning a data block with an implicit BlockType mismatch</span> |
| <span class="source-line-no">1149</span><span id="line-1149"> // will cause the requesting scanner to throw a disk read should be</span> |
| <span class="source-line-no">1150</span><span id="line-1150"> // forced here. This will potentially cause a significant number of</span> |
| <span class="source-line-no">1151</span><span id="line-1151"> // cache misses, so update so we should keep track of this as it might</span> |
| <span class="source-line-no">1152</span><span id="line-1152"> // justify the work on a CompoundScanner.</span> |
| <span class="source-line-no">1153</span><span id="line-1153"> if (</span> |
| <span class="source-line-no">1154</span><span id="line-1154"> !expectedDataBlockEncoding.equals(DataBlockEncoding.NONE)</span> |
| <span class="source-line-no">1155</span><span id="line-1155"> && !actualDataBlockEncoding.equals(DataBlockEncoding.NONE)</span> |
| <span class="source-line-no">1156</span><span id="line-1156"> ) {</span> |
| <span class="source-line-no">1157</span><span id="line-1157"> // If the block is encoded but the encoding does not match the</span> |
| <span class="source-line-no">1158</span><span id="line-1158"> // expected encoding it is likely the encoding was changed but the</span> |
| <span class="source-line-no">1159</span><span id="line-1159"> // block was not yet evicted. Evictions on file close happen async</span> |
| <span class="source-line-no">1160</span><span id="line-1160"> // so blocks with the old encoding still linger in cache for some</span> |
| <span class="source-line-no">1161</span><span id="line-1161"> // period of time. This event should be rare as it only happens on</span> |
| <span class="source-line-no">1162</span><span id="line-1162"> // schema definition change.</span> |
| <span class="source-line-no">1163</span><span id="line-1163"> LOG.info(</span> |
| <span class="source-line-no">1164</span><span id="line-1164"> "Evicting cached block with key {} because data block encoding mismatch; "</span> |
| <span class="source-line-no">1165</span><span id="line-1165"> + "expected {}, actual {}, path={}",</span> |
| <span class="source-line-no">1166</span><span id="line-1166"> cacheKey, actualDataBlockEncoding, expectedDataBlockEncoding, path);</span> |
| <span class="source-line-no">1167</span><span id="line-1167"> // This is an error scenario. so here we need to release the block.</span> |
| <span class="source-line-no">1168</span><span id="line-1168"> returnAndEvictBlock(cache, cacheKey, cachedBlock);</span> |
| <span class="source-line-no">1169</span><span id="line-1169"> }</span> |
| <span class="source-line-no">1170</span><span id="line-1170"> cachedBlock = null;</span> |
| <span class="source-line-no">1171</span><span id="line-1171"> return null;</span> |
| <span class="source-line-no">1172</span><span id="line-1172"> }</span> |
| <span class="source-line-no">1173</span><span id="line-1173"> return cachedBlock;</span> |
| <span class="source-line-no">1174</span><span id="line-1174"> }</span> |
| <span class="source-line-no">1175</span><span id="line-1175"> } catch (Exception e) {</span> |
| <span class="source-line-no">1176</span><span id="line-1176"> if (cachedBlock != null) {</span> |
| <span class="source-line-no">1177</span><span id="line-1177"> returnAndEvictBlock(cache, cacheKey, cachedBlock);</span> |
| <span class="source-line-no">1178</span><span id="line-1178"> }</span> |
| <span class="source-line-no">1179</span><span id="line-1179"> LOG.warn("Failed retrieving block from cache with key {}. "</span> |
| <span class="source-line-no">1180</span><span id="line-1180"> + "\n Evicting this block from cache and will read it from file system. "</span> |
| <span class="source-line-no">1181</span><span id="line-1181"> + "\n Exception details: ", cacheKey, e);</span> |
| <span class="source-line-no">1182</span><span id="line-1182"> if (LOG.isDebugEnabled()) {</span> |
| <span class="source-line-no">1183</span><span id="line-1183"> LOG.debug("Further tracing details for failed block cache retrieval:"</span> |
| <span class="source-line-no">1184</span><span id="line-1184"> + "\n Complete File path - {}," + "\n Expected Block Type - {}, Actual Block Type - {},"</span> |
| <span class="source-line-no">1185</span><span id="line-1185"> + "\n Cache compressed - {}" + "\n Header size (after deserialized from cache) - {}"</span> |
| <span class="source-line-no">1186</span><span id="line-1186"> + "\n Size with header - {}" + "\n Uncompressed size without header - {} "</span> |
| <span class="source-line-no">1187</span><span id="line-1187"> + "\n Total byte buffer size - {}" + "\n Encoding code - {}", this.path,</span> |
| <span class="source-line-no">1188</span><span id="line-1188"> expectedBlockType, (cachedBlock != null ? cachedBlock.getBlockType() : "N/A"),</span> |
| <span class="source-line-no">1189</span><span id="line-1189"> (expectedBlockType != null</span> |
| <span class="source-line-no">1190</span><span id="line-1190"> ? cacheConf.shouldCacheCompressed(expectedBlockType.getCategory())</span> |
| <span class="source-line-no">1191</span><span id="line-1191"> : "N/A"),</span> |
| <span class="source-line-no">1192</span><span id="line-1192"> (cachedBlock != null ? cachedBlock.headerSize() : "N/A"),</span> |
| <span class="source-line-no">1193</span><span id="line-1193"> (cachedBlock != null ? cachedBlock.getOnDiskSizeWithHeader() : "N/A"),</span> |
| <span class="source-line-no">1194</span><span id="line-1194"> (cachedBlock != null ? cachedBlock.getUncompressedSizeWithoutHeader() : "N/A"),</span> |
| <span class="source-line-no">1195</span><span id="line-1195"> (cachedBlock != null ? cachedBlock.getBufferReadOnly().limit() : "N/A"),</span> |
| <span class="source-line-no">1196</span><span id="line-1196"> (cachedBlock != null</span> |
| <span class="source-line-no">1197</span><span id="line-1197"> ? cachedBlock.getBufferReadOnly().getShort(cachedBlock.headerSize())</span> |
| <span class="source-line-no">1198</span><span id="line-1198"> : "N/A"));</span> |
| <span class="source-line-no">1199</span><span id="line-1199"> }</span> |
| <span class="source-line-no">1200</span><span id="line-1200"> return null;</span> |
| <span class="source-line-no">1201</span><span id="line-1201"> } finally {</span> |
| <span class="source-line-no">1202</span><span id="line-1202"> // Count bytes read as cached block is being returned</span> |
| <span class="source-line-no">1203</span><span id="line-1203"> if (isScanMetricsEnabled && cachedBlock != null) {</span> |
| <span class="source-line-no">1204</span><span id="line-1204"> cachedBlockBytesRead = cachedBlock.getOnDiskSizeWithHeader();</span> |
| <span class="source-line-no">1205</span><span id="line-1205"> // Account for the header size of the next block if it exists</span> |
| <span class="source-line-no">1206</span><span id="line-1206"> if (cachedBlock.getNextBlockOnDiskSize() > 0) {</span> |
| <span class="source-line-no">1207</span><span id="line-1207"> cachedBlockBytesRead += cachedBlock.headerSize();</span> |
| <span class="source-line-no">1208</span><span id="line-1208"> }</span> |
| <span class="source-line-no">1209</span><span id="line-1209"> }</span> |
| <span class="source-line-no">1210</span><span id="line-1210"> if (cachedBlockBytesRead > 0) {</span> |
| <span class="source-line-no">1211</span><span id="line-1211"> ThreadLocalServerSideScanMetrics.addBytesReadFromBlockCache(cachedBlockBytesRead);</span> |
| <span class="source-line-no">1212</span><span id="line-1212"> }</span> |
| <span class="source-line-no">1213</span><span id="line-1213"> }</span> |
| <span class="source-line-no">1214</span><span id="line-1214"> }</span> |
| <span class="source-line-no">1215</span><span id="line-1215"> return null;</span> |
| <span class="source-line-no">1216</span><span id="line-1216"> }</span> |
| <span class="source-line-no">1217</span><span id="line-1217"></span> |
| <span class="source-line-no">1218</span><span id="line-1218"> private void returnAndEvictBlock(BlockCache cache, BlockCacheKey cacheKey, Cacheable block) {</span> |
| <span class="source-line-no">1219</span><span id="line-1219"> block.release();</span> |
| <span class="source-line-no">1220</span><span id="line-1220"> cache.evictBlock(cacheKey);</span> |
| <span class="source-line-no">1221</span><span id="line-1221"> }</span> |
| <span class="source-line-no">1222</span><span id="line-1222"></span> |
| <span class="source-line-no">1223</span><span id="line-1223"> /**</span> |
| <span class="source-line-no">1224</span><span id="line-1224"> * @param cacheBlock Add block to cache, if found</span> |
| <span class="source-line-no">1225</span><span id="line-1225"> * @return block wrapped in a ByteBuffer, with header skipped</span> |
| <span class="source-line-no">1226</span><span id="line-1226"> */</span> |
| <span class="source-line-no">1227</span><span id="line-1227"> @Override</span> |
| <span class="source-line-no">1228</span><span id="line-1228"> public HFileBlock getMetaBlock(String metaBlockName, boolean cacheBlock) throws IOException {</span> |
| <span class="source-line-no">1229</span><span id="line-1229"> if (trailer.getMetaIndexCount() == 0) {</span> |
| <span class="source-line-no">1230</span><span id="line-1230"> return null; // there are no meta blocks</span> |
| <span class="source-line-no">1231</span><span id="line-1231"> }</span> |
| <span class="source-line-no">1232</span><span id="line-1232"> if (metaBlockIndexReader == null) {</span> |
| <span class="source-line-no">1233</span><span id="line-1233"> throw new IOException(path + " meta index not loaded");</span> |
| <span class="source-line-no">1234</span><span id="line-1234"> }</span> |
| <span class="source-line-no">1235</span><span id="line-1235"></span> |
| <span class="source-line-no">1236</span><span id="line-1236"> byte[] mbname = Bytes.toBytes(metaBlockName);</span> |
| <span class="source-line-no">1237</span><span id="line-1237"> int block = metaBlockIndexReader.rootBlockContainingKey(mbname, 0, mbname.length);</span> |
| <span class="source-line-no">1238</span><span id="line-1238"> if (block == -1) {</span> |
| <span class="source-line-no">1239</span><span id="line-1239"> return null;</span> |
| <span class="source-line-no">1240</span><span id="line-1240"> }</span> |
| <span class="source-line-no">1241</span><span id="line-1241"> long blockSize = metaBlockIndexReader.getRootBlockDataSize(block);</span> |
| <span class="source-line-no">1242</span><span id="line-1242"></span> |
| <span class="source-line-no">1243</span><span id="line-1243"> // Per meta key from any given file, synchronize reads for said block. This</span> |
| <span class="source-line-no">1244</span><span id="line-1244"> // is OK to do for meta blocks because the meta block index is always</span> |
| <span class="source-line-no">1245</span><span id="line-1245"> // single-level.</span> |
| <span class="source-line-no">1246</span><span id="line-1246"> synchronized (metaBlockIndexReader.getRootBlockKey(block)) {</span> |
| <span class="source-line-no">1247</span><span id="line-1247"> // Check cache for block. If found return.</span> |
| <span class="source-line-no">1248</span><span id="line-1248"> long metaBlockOffset = metaBlockIndexReader.getRootBlockOffset(block);</span> |
| <span class="source-line-no">1249</span><span id="line-1249"> BlockCacheKey cacheKey =</span> |
| <span class="source-line-no">1250</span><span id="line-1250"> new BlockCacheKey(name, metaBlockOffset, this.isPrimaryReplicaReader(), BlockType.META);</span> |
| <span class="source-line-no">1251</span><span id="line-1251"></span> |
| <span class="source-line-no">1252</span><span id="line-1252"> cacheBlock &=</span> |
| <span class="source-line-no">1253</span><span id="line-1253"> cacheConf.shouldCacheBlockOnRead(BlockType.META.getCategory(), getHFileInfo(), conf);</span> |
| <span class="source-line-no">1254</span><span id="line-1254"> HFileBlock cachedBlock =</span> |
| <span class="source-line-no">1255</span><span id="line-1255"> getCachedBlock(cacheKey, cacheBlock, false, true, BlockType.META, null);</span> |
| <span class="source-line-no">1256</span><span id="line-1256"> if (cachedBlock != null) {</span> |
| <span class="source-line-no">1257</span><span id="line-1257"> assert cachedBlock.isUnpacked() : "Packed block leak.";</span> |
| <span class="source-line-no">1258</span><span id="line-1258"> // Return a distinct 'shallow copy' of the block,</span> |
| <span class="source-line-no">1259</span><span id="line-1259"> // so pos does not get messed by the scanner</span> |
| <span class="source-line-no">1260</span><span id="line-1260"> return cachedBlock;</span> |
| <span class="source-line-no">1261</span><span id="line-1261"> }</span> |
| <span class="source-line-no">1262</span><span id="line-1262"> // Cache Miss, please load.</span> |
| <span class="source-line-no">1263</span><span id="line-1263"></span> |
| <span class="source-line-no">1264</span><span id="line-1264"> HFileBlock compressedBlock =</span> |
| <span class="source-line-no">1265</span><span id="line-1265"> fsBlockReader.readBlockData(metaBlockOffset, blockSize, true, false, true);</span> |
| <span class="source-line-no">1266</span><span id="line-1266"> HFileBlock uncompressedBlock = compressedBlock.unpack(hfileContext, fsBlockReader);</span> |
| <span class="source-line-no">1267</span><span id="line-1267"> if (compressedBlock != uncompressedBlock) {</span> |
| <span class="source-line-no">1268</span><span id="line-1268"> compressedBlock.release();</span> |
| <span class="source-line-no">1269</span><span id="line-1269"> }</span> |
| <span class="source-line-no">1270</span><span id="line-1270"></span> |
| <span class="source-line-no">1271</span><span id="line-1271"> // Cache the block</span> |
| <span class="source-line-no">1272</span><span id="line-1272"> if (cacheBlock) {</span> |
| <span class="source-line-no">1273</span><span id="line-1273"> cacheConf.getBlockCache().ifPresent(</span> |
| <span class="source-line-no">1274</span><span id="line-1274"> cache -> cache.cacheBlock(cacheKey, uncompressedBlock, cacheConf.isInMemory()));</span> |
| <span class="source-line-no">1275</span><span id="line-1275"> }</span> |
| <span class="source-line-no">1276</span><span id="line-1276"> return uncompressedBlock;</span> |
| <span class="source-line-no">1277</span><span id="line-1277"> }</span> |
| <span class="source-line-no">1278</span><span id="line-1278"> }</span> |
| <span class="source-line-no">1279</span><span id="line-1279"></span> |
| <span class="source-line-no">1280</span><span id="line-1280"> /**</span> |
| <span class="source-line-no">1281</span><span id="line-1281"> * Whether we use heap or not depends on our intent to cache the block. We want to avoid</span> |
| <span class="source-line-no">1282</span><span id="line-1282"> * allocating to off-heap if we intend to cache into the on-heap L1 cache. Otherwise, it's more</span> |
| <span class="source-line-no">1283</span><span id="line-1283"> * efficient to allocate to off-heap since we can control GC ourselves for those. So our decision</span> |
| <span class="source-line-no">1284</span><span id="line-1284"> * here breaks down as follows: <br></span> |
| <span class="source-line-no">1285</span><span id="line-1285"> * If block cache is disabled, don't use heap. If we're not using the CombinedBlockCache, use heap</span> |
| <span class="source-line-no">1286</span><span id="line-1286"> * unless caching is disabled for the request. Otherwise, only use heap if caching is enabled and</span> |
| <span class="source-line-no">1287</span><span id="line-1287"> * the expected block type is not DATA (which goes to off-heap L2 in combined cache).</span> |
| <span class="source-line-no">1288</span><span id="line-1288"> * @see org.apache.hadoop.hbase.io.hfile.HFileBlock.FSReader#readBlockData(long, long, boolean,</span> |
| <span class="source-line-no">1289</span><span id="line-1289"> * boolean, boolean)</span> |
| <span class="source-line-no">1290</span><span id="line-1290"> */</span> |
| <span class="source-line-no">1291</span><span id="line-1291"> private boolean shouldUseHeap(BlockType expectedBlockType, boolean cacheBlock) {</span> |
| <span class="source-line-no">1292</span><span id="line-1292"> if (!cacheConf.getBlockCache().isPresent()) {</span> |
| <span class="source-line-no">1293</span><span id="line-1293"> return false;</span> |
| <span class="source-line-no">1294</span><span id="line-1294"> }</span> |
| <span class="source-line-no">1295</span><span id="line-1295"></span> |
| <span class="source-line-no">1296</span><span id="line-1296"> // we only cache a block if cacheBlock is true and caching-on-read is enabled in CacheConfig</span> |
| <span class="source-line-no">1297</span><span id="line-1297"> // we can really only check for that if have an expectedBlockType</span> |
| <span class="source-line-no">1298</span><span id="line-1298"> if (expectedBlockType != null) {</span> |
| <span class="source-line-no">1299</span><span id="line-1299"> cacheBlock &= cacheConf.shouldCacheBlockOnRead(expectedBlockType.getCategory());</span> |
| <span class="source-line-no">1300</span><span id="line-1300"> }</span> |
| <span class="source-line-no">1301</span><span id="line-1301"></span> |
| <span class="source-line-no">1302</span><span id="line-1302"> if (!cacheConf.isCombinedBlockCache()) {</span> |
| <span class="source-line-no">1303</span><span id="line-1303"> // Block to cache in LruBlockCache must be an heap one, if caching enabled. So just allocate</span> |
| <span class="source-line-no">1304</span><span id="line-1304"> // block memory from heap for saving an extra off-heap to heap copying in that case.</span> |
| <span class="source-line-no">1305</span><span id="line-1305"> return cacheBlock;</span> |
| <span class="source-line-no">1306</span><span id="line-1306"> }</span> |
| <span class="source-line-no">1307</span><span id="line-1307"></span> |
| <span class="source-line-no">1308</span><span id="line-1308"> return cacheBlock && expectedBlockType != null && !expectedBlockType.isData();</span> |
| <span class="source-line-no">1309</span><span id="line-1309"> }</span> |
| <span class="source-line-no">1310</span><span id="line-1310"></span> |
| <span class="source-line-no">1311</span><span id="line-1311"> @Override</span> |
| <span class="source-line-no">1312</span><span id="line-1312"> public HFileBlock readBlock(long dataBlockOffset, long onDiskBlockSize, final boolean cacheBlock,</span> |
| <span class="source-line-no">1313</span><span id="line-1313"> boolean pread, final boolean isCompaction, boolean updateCacheMetrics,</span> |
| <span class="source-line-no">1314</span><span id="line-1314"> BlockType expectedBlockType, DataBlockEncoding expectedDataBlockEncoding) throws IOException {</span> |
| <span class="source-line-no">1315</span><span id="line-1315"> return readBlock(dataBlockOffset, onDiskBlockSize, cacheBlock, pread, isCompaction,</span> |
| <span class="source-line-no">1316</span><span id="line-1316"> updateCacheMetrics, expectedBlockType, expectedDataBlockEncoding, false);</span> |
| <span class="source-line-no">1317</span><span id="line-1317"> }</span> |
| <span class="source-line-no">1318</span><span id="line-1318"></span> |
| <span class="source-line-no">1319</span><span id="line-1319"> @Override</span> |
| <span class="source-line-no">1320</span><span id="line-1320"> public HFileBlock readBlock(long dataBlockOffset, long onDiskBlockSize, final boolean cacheBlock,</span> |
| <span class="source-line-no">1321</span><span id="line-1321"> boolean pread, final boolean isCompaction, boolean updateCacheMetrics,</span> |
| <span class="source-line-no">1322</span><span id="line-1322"> BlockType expectedBlockType, DataBlockEncoding expectedDataBlockEncoding, boolean cacheOnly)</span> |
| <span class="source-line-no">1323</span><span id="line-1323"> throws IOException {</span> |
| <span class="source-line-no">1324</span><span id="line-1324"> if (dataBlockIndexReader == null) {</span> |
| <span class="source-line-no">1325</span><span id="line-1325"> throw new IOException(path + " block index not loaded");</span> |
| <span class="source-line-no">1326</span><span id="line-1326"> }</span> |
| <span class="source-line-no">1327</span><span id="line-1327"> long trailerOffset = trailer.getLoadOnOpenDataOffset();</span> |
| <span class="source-line-no">1328</span><span id="line-1328"> if (dataBlockOffset < 0 || dataBlockOffset >= trailerOffset) {</span> |
| <span class="source-line-no">1329</span><span id="line-1329"> throw new IOException("Requested block is out of range: " + dataBlockOffset</span> |
| <span class="source-line-no">1330</span><span id="line-1330"> + ", lastDataBlockOffset: " + trailer.getLastDataBlockOffset()</span> |
| <span class="source-line-no">1331</span><span id="line-1331"> + ", trailer.getLoadOnOpenDataOffset: " + trailerOffset + ", path=" + path);</span> |
| <span class="source-line-no">1332</span><span id="line-1332"> }</span> |
| <span class="source-line-no">1333</span><span id="line-1333"> // For any given block from any given file, synchronize reads for said</span> |
| <span class="source-line-no">1334</span><span id="line-1334"> // block.</span> |
| <span class="source-line-no">1335</span><span id="line-1335"> // Without a cache, this synchronizing is needless overhead, but really</span> |
| <span class="source-line-no">1336</span><span id="line-1336"> // the other choice is to duplicate work (which the cache would prevent you</span> |
| <span class="source-line-no">1337</span><span id="line-1337"> // from doing).</span> |
| <span class="source-line-no">1338</span><span id="line-1338"></span> |
| <span class="source-line-no">1339</span><span id="line-1339"> BlockCacheKey cacheKey =</span> |
| <span class="source-line-no">1340</span><span id="line-1340"> new BlockCacheKey(path, dataBlockOffset, this.isPrimaryReplicaReader(), expectedBlockType);</span> |
| <span class="source-line-no">1341</span><span id="line-1341"></span> |
| <span class="source-line-no">1342</span><span id="line-1342"> boolean useLock = false;</span> |
| <span class="source-line-no">1343</span><span id="line-1343"> IdLock.Entry lockEntry = null;</span> |
| <span class="source-line-no">1344</span><span id="line-1344"> final Span span = Span.current();</span> |
| <span class="source-line-no">1345</span><span id="line-1345"> // BlockCacheKey#toString() is quite expensive to call, so if tracing isn't enabled, don't</span> |
| <span class="source-line-no">1346</span><span id="line-1346"> // record</span> |
| <span class="source-line-no">1347</span><span id="line-1347"> Attributes attributes = span.isRecording()</span> |
| <span class="source-line-no">1348</span><span id="line-1348"> ? Attributes.of(BLOCK_CACHE_KEY_KEY, cacheKey.toString())</span> |
| <span class="source-line-no">1349</span><span id="line-1349"> : Attributes.empty();</span> |
| <span class="source-line-no">1350</span><span id="line-1350"> try {</span> |
| <span class="source-line-no">1351</span><span id="line-1351"> while (true) {</span> |
| <span class="source-line-no">1352</span><span id="line-1352"> // Check cache for block. If found return.</span> |
| <span class="source-line-no">1353</span><span id="line-1353"> if (cacheConf.shouldReadBlockFromCache(expectedBlockType) && !cacheOnly) {</span> |
| <span class="source-line-no">1354</span><span id="line-1354"> if (useLock) {</span> |
| <span class="source-line-no">1355</span><span id="line-1355"> lockEntry = offsetLock.getLockEntry(dataBlockOffset);</span> |
| <span class="source-line-no">1356</span><span id="line-1356"> }</span> |
| <span class="source-line-no">1357</span><span id="line-1357"> // Try and get the block from the block cache. If the useLock variable is true then this</span> |
| <span class="source-line-no">1358</span><span id="line-1358"> // is the second time through the loop and it should not be counted as a block cache miss.</span> |
| <span class="source-line-no">1359</span><span id="line-1359"> HFileBlock cachedBlock = getCachedBlock(cacheKey, cacheBlock, useLock, updateCacheMetrics,</span> |
| <span class="source-line-no">1360</span><span id="line-1360"> expectedBlockType, expectedDataBlockEncoding);</span> |
| <span class="source-line-no">1361</span><span id="line-1361"> if (cachedBlock != null) {</span> |
| <span class="source-line-no">1362</span><span id="line-1362"> if (LOG.isTraceEnabled()) {</span> |
| <span class="source-line-no">1363</span><span id="line-1363"> LOG.trace("Block for file {} is coming from Cache {}",</span> |
| <span class="source-line-no">1364</span><span id="line-1364"> Bytes.toString(cachedBlock.getHFileContext().getTableName()), cachedBlock);</span> |
| <span class="source-line-no">1365</span><span id="line-1365"> }</span> |
| <span class="source-line-no">1366</span><span id="line-1366"> span.addEvent("block cache hit", attributes);</span> |
| <span class="source-line-no">1367</span><span id="line-1367"> assert cachedBlock.isUnpacked() : "Packed block leak.";</span> |
| <span class="source-line-no">1368</span><span id="line-1368"> if (cachedBlock.getBlockType().isData()) {</span> |
| <span class="source-line-no">1369</span><span id="line-1369"> if (updateCacheMetrics) {</span> |
| <span class="source-line-no">1370</span><span id="line-1370"> HFile.DATABLOCK_READ_COUNT.increment();</span> |
| <span class="source-line-no">1371</span><span id="line-1371"> }</span> |
| <span class="source-line-no">1372</span><span id="line-1372"> // Validate encoding type for data blocks. We include encoding</span> |
| <span class="source-line-no">1373</span><span id="line-1373"> // type in the cache key, and we expect it to match on a cache hit.</span> |
| <span class="source-line-no">1374</span><span id="line-1374"> if (cachedBlock.getDataBlockEncoding() != dataBlockEncoder.getDataBlockEncoding()) {</span> |
| <span class="source-line-no">1375</span><span id="line-1375"> // Remember to release the block when in exceptional path.</span> |
| <span class="source-line-no">1376</span><span id="line-1376"> cacheConf.getBlockCache().ifPresent(cache -> {</span> |
| <span class="source-line-no">1377</span><span id="line-1377"> returnAndEvictBlock(cache, cacheKey, cachedBlock);</span> |
| <span class="source-line-no">1378</span><span id="line-1378"> });</span> |
| <span class="source-line-no">1379</span><span id="line-1379"> throw new IOException("Cached block under key " + cacheKey + " "</span> |
| <span class="source-line-no">1380</span><span id="line-1380"> + "has wrong encoding: " + cachedBlock.getDataBlockEncoding() + " (expected: "</span> |
| <span class="source-line-no">1381</span><span id="line-1381"> + dataBlockEncoder.getDataBlockEncoding() + "), path=" + path);</span> |
| <span class="source-line-no">1382</span><span id="line-1382"> }</span> |
| <span class="source-line-no">1383</span><span id="line-1383"> }</span> |
| <span class="source-line-no">1384</span><span id="line-1384"> // Cache-hit. Return!</span> |
| <span class="source-line-no">1385</span><span id="line-1385"> return cachedBlock;</span> |
| <span class="source-line-no">1386</span><span id="line-1386"> }</span> |
| <span class="source-line-no">1387</span><span id="line-1387"></span> |
| <span class="source-line-no">1388</span><span id="line-1388"> if (!useLock && cacheBlock && cacheConf.shouldLockOnCacheMiss(expectedBlockType)) {</span> |
| <span class="source-line-no">1389</span><span id="line-1389"> // check cache again with lock</span> |
| <span class="source-line-no">1390</span><span id="line-1390"> useLock = true;</span> |
| <span class="source-line-no">1391</span><span id="line-1391"> continue;</span> |
| <span class="source-line-no">1392</span><span id="line-1392"> }</span> |
| <span class="source-line-no">1393</span><span id="line-1393"> // Carry on, please load.</span> |
| <span class="source-line-no">1394</span><span id="line-1394"> }</span> |
| <span class="source-line-no">1395</span><span id="line-1395"></span> |
| <span class="source-line-no">1396</span><span id="line-1396"> span.addEvent("block cache miss", attributes);</span> |
| <span class="source-line-no">1397</span><span id="line-1397"> // Load block from filesystem.</span> |
| <span class="source-line-no">1398</span><span id="line-1398"> HFileBlock hfileBlock = fsBlockReader.readBlockData(dataBlockOffset, onDiskBlockSize, pread,</span> |
| <span class="source-line-no">1399</span><span id="line-1399"> !isCompaction, shouldUseHeap(expectedBlockType, cacheBlock));</span> |
| <span class="source-line-no">1400</span><span id="line-1400"> try {</span> |
| <span class="source-line-no">1401</span><span id="line-1401"> validateBlockType(hfileBlock, expectedBlockType);</span> |
| <span class="source-line-no">1402</span><span id="line-1402"> } catch (IOException e) {</span> |
| <span class="source-line-no">1403</span><span id="line-1403"> hfileBlock.release();</span> |
| <span class="source-line-no">1404</span><span id="line-1404"> throw e;</span> |
| <span class="source-line-no">1405</span><span id="line-1405"> }</span> |
| <span class="source-line-no">1406</span><span id="line-1406"> BlockType.BlockCategory category = hfileBlock.getBlockType().getCategory();</span> |
| <span class="source-line-no">1407</span><span id="line-1407"> final boolean cacheCompressed = cacheConf.shouldCacheCompressed(category);</span> |
| <span class="source-line-no">1408</span><span id="line-1408"> final boolean cacheOnRead =</span> |
| <span class="source-line-no">1409</span><span id="line-1409"> cacheConf.shouldCacheBlockOnRead(category, getHFileInfo(), conf);</span> |
| <span class="source-line-no">1410</span><span id="line-1410"></span> |
| <span class="source-line-no">1411</span><span id="line-1411"> // Don't need the unpacked block back and we're storing the block in the cache compressed</span> |
| <span class="source-line-no">1412</span><span id="line-1412"> if (cacheOnly && cacheCompressed && cacheOnRead) {</span> |
| <span class="source-line-no">1413</span><span id="line-1413"> HFileBlock blockNoChecksum = BlockCacheUtil.getBlockForCaching(cacheConf, hfileBlock);</span> |
| <span class="source-line-no">1414</span><span id="line-1414"> cacheConf.getBlockCache().ifPresent(cache -> {</span> |
| <span class="source-line-no">1415</span><span id="line-1415"> LOG.debug("Skipping decompression of block {} in prefetch", cacheKey);</span> |
| <span class="source-line-no">1416</span><span id="line-1416"> // Cache the block if necessary</span> |
| <span class="source-line-no">1417</span><span id="line-1417"> if (cacheBlock && cacheOnRead) {</span> |
| <span class="source-line-no">1418</span><span id="line-1418"> cache.cacheBlock(cacheKey, blockNoChecksum, cacheConf.isInMemory(), cacheOnly);</span> |
| <span class="source-line-no">1419</span><span id="line-1419"> }</span> |
| <span class="source-line-no">1420</span><span id="line-1420"> });</span> |
| <span class="source-line-no">1421</span><span id="line-1421"></span> |
| <span class="source-line-no">1422</span><span id="line-1422"> if (updateCacheMetrics && hfileBlock.getBlockType().isData()) {</span> |
| <span class="source-line-no">1423</span><span id="line-1423"> HFile.DATABLOCK_READ_COUNT.increment();</span> |
| <span class="source-line-no">1424</span><span id="line-1424"> }</span> |
| <span class="source-line-no">1425</span><span id="line-1425"> return blockNoChecksum;</span> |
| <span class="source-line-no">1426</span><span id="line-1426"> }</span> |
| <span class="source-line-no">1427</span><span id="line-1427"> HFileBlock unpacked = hfileBlock.unpack(hfileContext, fsBlockReader);</span> |
| <span class="source-line-no">1428</span><span id="line-1428"> HFileBlock unpackedNoChecksum = BlockCacheUtil.getBlockForCaching(cacheConf, unpacked);</span> |
| <span class="source-line-no">1429</span><span id="line-1429"> // Cache the block if necessary</span> |
| <span class="source-line-no">1430</span><span id="line-1430"> cacheConf.getBlockCache().ifPresent(cache -> {</span> |
| <span class="source-line-no">1431</span><span id="line-1431"> if (cacheBlock && cacheOnRead) {</span> |
| <span class="source-line-no">1432</span><span id="line-1432"> // Using the wait on cache during compaction and prefetching.</span> |
| <span class="source-line-no">1433</span><span id="line-1433"> cache.cacheBlock(cacheKey,</span> |
| <span class="source-line-no">1434</span><span id="line-1434"> cacheCompressed</span> |
| <span class="source-line-no">1435</span><span id="line-1435"> ? BlockCacheUtil.getBlockForCaching(cacheConf, hfileBlock)</span> |
| <span class="source-line-no">1436</span><span id="line-1436"> : unpackedNoChecksum,</span> |
| <span class="source-line-no">1437</span><span id="line-1437"> cacheConf.isInMemory(), cacheOnly);</span> |
| <span class="source-line-no">1438</span><span id="line-1438"> }</span> |
| <span class="source-line-no">1439</span><span id="line-1439"> });</span> |
| <span class="source-line-no">1440</span><span id="line-1440"> if (unpacked != hfileBlock) {</span> |
| <span class="source-line-no">1441</span><span id="line-1441"> // End of life here if hfileBlock is an independent block.</span> |
| <span class="source-line-no">1442</span><span id="line-1442"> hfileBlock.release();</span> |
| <span class="source-line-no">1443</span><span id="line-1443"> }</span> |
| <span class="source-line-no">1444</span><span id="line-1444"> if (updateCacheMetrics && hfileBlock.getBlockType().isData()) {</span> |
| <span class="source-line-no">1445</span><span id="line-1445"> HFile.DATABLOCK_READ_COUNT.increment();</span> |
| <span class="source-line-no">1446</span><span id="line-1446"> }</span> |
| <span class="source-line-no">1447</span><span id="line-1447"></span> |
| <span class="source-line-no">1448</span><span id="line-1448"> return unpackedNoChecksum;</span> |
| <span class="source-line-no">1449</span><span id="line-1449"> }</span> |
| <span class="source-line-no">1450</span><span id="line-1450"> } finally {</span> |
| <span class="source-line-no">1451</span><span id="line-1451"> if (lockEntry != null) {</span> |
| <span class="source-line-no">1452</span><span id="line-1452"> offsetLock.releaseLockEntry(lockEntry);</span> |
| <span class="source-line-no">1453</span><span id="line-1453"> }</span> |
| <span class="source-line-no">1454</span><span id="line-1454"> }</span> |
| <span class="source-line-no">1455</span><span id="line-1455"> }</span> |
| <span class="source-line-no">1456</span><span id="line-1456"></span> |
| <span class="source-line-no">1457</span><span id="line-1457"> @Override</span> |
| <span class="source-line-no">1458</span><span id="line-1458"> public boolean hasMVCCInfo() {</span> |
| <span class="source-line-no">1459</span><span id="line-1459"> return fileInfo.shouldIncludeMemStoreTS() && fileInfo.isDecodeMemstoreTS();</span> |
| <span class="source-line-no">1460</span><span id="line-1460"> }</span> |
| <span class="source-line-no">1461</span><span id="line-1461"></span> |
| <span class="source-line-no">1462</span><span id="line-1462"> /**</span> |
| <span class="source-line-no">1463</span><span id="line-1463"> * Compares the actual type of a block retrieved from cache or disk with its expected type and</span> |
| <span class="source-line-no">1464</span><span id="line-1464"> * throws an exception in case of a mismatch. Expected block type of {@link BlockType#DATA} is</span> |
| <span class="source-line-no">1465</span><span id="line-1465"> * considered to match the actual block type [@link {@link BlockType#ENCODED_DATA} as well.</span> |
| <span class="source-line-no">1466</span><span id="line-1466"> * @param block a block retrieved from cache or disk</span> |
| <span class="source-line-no">1467</span><span id="line-1467"> * @param expectedBlockType the expected block type, or null to skip the check</span> |
| <span class="source-line-no">1468</span><span id="line-1468"> */</span> |
| <span class="source-line-no">1469</span><span id="line-1469"> private void validateBlockType(HFileBlock block, BlockType expectedBlockType) throws IOException {</span> |
| <span class="source-line-no">1470</span><span id="line-1470"> if (expectedBlockType == null) {</span> |
| <span class="source-line-no">1471</span><span id="line-1471"> return;</span> |
| <span class="source-line-no">1472</span><span id="line-1472"> }</span> |
| <span class="source-line-no">1473</span><span id="line-1473"> BlockType actualBlockType = block.getBlockType();</span> |
| <span class="source-line-no">1474</span><span id="line-1474"> if (expectedBlockType.isData() && actualBlockType.isData()) {</span> |
| <span class="source-line-no">1475</span><span id="line-1475"> // We consider DATA to match ENCODED_DATA for the purpose of this</span> |
| <span class="source-line-no">1476</span><span id="line-1476"> // verification.</span> |
| <span class="source-line-no">1477</span><span id="line-1477"> return;</span> |
| <span class="source-line-no">1478</span><span id="line-1478"> }</span> |
| <span class="source-line-no">1479</span><span id="line-1479"> if (actualBlockType != expectedBlockType) {</span> |
| <span class="source-line-no">1480</span><span id="line-1480"> throw new IOException("Expected block type " + expectedBlockType + ", " + "but got "</span> |
| <span class="source-line-no">1481</span><span id="line-1481"> + actualBlockType + ": " + block + ", path=" + path);</span> |
| <span class="source-line-no">1482</span><span id="line-1482"> }</span> |
| <span class="source-line-no">1483</span><span id="line-1483"> }</span> |
| <span class="source-line-no">1484</span><span id="line-1484"></span> |
| <span class="source-line-no">1485</span><span id="line-1485"> /**</span> |
| <span class="source-line-no">1486</span><span id="line-1486"> * @return Last key as cell in the file. May be null if file has no entries. Note that this is not</span> |
| <span class="source-line-no">1487</span><span id="line-1487"> * the last row key, but it is the Cell representation of the last key</span> |
| <span class="source-line-no">1488</span><span id="line-1488"> */</span> |
| <span class="source-line-no">1489</span><span id="line-1489"> @Override</span> |
| <span class="source-line-no">1490</span><span id="line-1490"> public Optional<ExtendedCell> getLastKey() {</span> |
| <span class="source-line-no">1491</span><span id="line-1491"> return dataBlockIndexReader.isEmpty()</span> |
| <span class="source-line-no">1492</span><span id="line-1492"> ? Optional.empty()</span> |
| <span class="source-line-no">1493</span><span id="line-1493"> : Optional.of(fileInfo.getLastKeyCell());</span> |
| <span class="source-line-no">1494</span><span id="line-1494"> }</span> |
| <span class="source-line-no">1495</span><span id="line-1495"></span> |
| <span class="source-line-no">1496</span><span id="line-1496"> /**</span> |
| <span class="source-line-no">1497</span><span id="line-1497"> * @return Midkey for this file. We work with block boundaries only so returned midkey is an</span> |
| <span class="source-line-no">1498</span><span id="line-1498"> * approximation only.</span> |
| <span class="source-line-no">1499</span><span id="line-1499"> */</span> |
| <span class="source-line-no">1500</span><span id="line-1500"> @Override</span> |
| <span class="source-line-no">1501</span><span id="line-1501"> public Optional<ExtendedCell> midKey() throws IOException {</span> |
| <span class="source-line-no">1502</span><span id="line-1502"> return Optional.ofNullable(dataBlockIndexReader.midkey(this));</span> |
| <span class="source-line-no">1503</span><span id="line-1503"> }</span> |
| <span class="source-line-no">1504</span><span id="line-1504"></span> |
| <span class="source-line-no">1505</span><span id="line-1505"> @Override</span> |
| <span class="source-line-no">1506</span><span id="line-1506"> public void close() throws IOException {</span> |
| <span class="source-line-no">1507</span><span id="line-1507"> close(cacheConf.shouldEvictOnClose());</span> |
| <span class="source-line-no">1508</span><span id="line-1508"> }</span> |
| <span class="source-line-no">1509</span><span id="line-1509"></span> |
| <span class="source-line-no">1510</span><span id="line-1510"> @Override</span> |
| <span class="source-line-no">1511</span><span id="line-1511"> public DataBlockEncoding getEffectiveEncodingInCache(boolean isCompaction) {</span> |
| <span class="source-line-no">1512</span><span id="line-1512"> return dataBlockEncoder.getEffectiveEncodingInCache(isCompaction);</span> |
| <span class="source-line-no">1513</span><span id="line-1513"> }</span> |
| <span class="source-line-no">1514</span><span id="line-1514"></span> |
| <span class="source-line-no">1515</span><span id="line-1515"> /** For testing */</span> |
| <span class="source-line-no">1516</span><span id="line-1516"> @Override</span> |
| <span class="source-line-no">1517</span><span id="line-1517"> public HFileBlock.FSReader getUncachedBlockReader() {</span> |
| <span class="source-line-no">1518</span><span id="line-1518"> return fsBlockReader;</span> |
| <span class="source-line-no">1519</span><span id="line-1519"> }</span> |
| <span class="source-line-no">1520</span><span id="line-1520"></span> |
| <span class="source-line-no">1521</span><span id="line-1521"> /**</span> |
| <span class="source-line-no">1522</span><span id="line-1522"> * Scanner that operates on encoded data blocks.</span> |
| <span class="source-line-no">1523</span><span id="line-1523"> */</span> |
| <span class="source-line-no">1524</span><span id="line-1524"> protected static class EncodedScanner extends HFileScannerImpl {</span> |
| <span class="source-line-no">1525</span><span id="line-1525"> private final HFileBlockDecodingContext decodingCtx;</span> |
| <span class="source-line-no">1526</span><span id="line-1526"> private final DataBlockEncoder.EncodedSeeker seeker;</span> |
| <span class="source-line-no">1527</span><span id="line-1527"> private final DataBlockEncoder dataBlockEncoder;</span> |
| <span class="source-line-no">1528</span><span id="line-1528"></span> |
| <span class="source-line-no">1529</span><span id="line-1529"> public EncodedScanner(HFile.Reader reader, boolean cacheBlocks, boolean pread,</span> |
| <span class="source-line-no">1530</span><span id="line-1530"> boolean isCompaction, HFileContext meta, Configuration conf) {</span> |
| <span class="source-line-no">1531</span><span id="line-1531"> super(reader, cacheBlocks, pread, isCompaction);</span> |
| <span class="source-line-no">1532</span><span id="line-1532"> DataBlockEncoding encoding = reader.getDataBlockEncoding();</span> |
| <span class="source-line-no">1533</span><span id="line-1533"> dataBlockEncoder = encoding.getEncoder();</span> |
| <span class="source-line-no">1534</span><span id="line-1534"> decodingCtx = dataBlockEncoder.newDataBlockDecodingContext(conf, meta);</span> |
| <span class="source-line-no">1535</span><span id="line-1535"> seeker = dataBlockEncoder.createSeeker(decodingCtx);</span> |
| <span class="source-line-no">1536</span><span id="line-1536"> }</span> |
| <span class="source-line-no">1537</span><span id="line-1537"></span> |
| <span class="source-line-no">1538</span><span id="line-1538"> @Override</span> |
| <span class="source-line-no">1539</span><span id="line-1539"> public boolean isSeeked() {</span> |
| <span class="source-line-no">1540</span><span id="line-1540"> return curBlock != null;</span> |
| <span class="source-line-no">1541</span><span id="line-1541"> }</span> |
| <span class="source-line-no">1542</span><span id="line-1542"></span> |
| <span class="source-line-no">1543</span><span id="line-1543"> @Override</span> |
| <span class="source-line-no">1544</span><span id="line-1544"> public void setNonSeekedState() {</span> |
| <span class="source-line-no">1545</span><span id="line-1545"> reset();</span> |
| <span class="source-line-no">1546</span><span id="line-1546"> }</span> |
| <span class="source-line-no">1547</span><span id="line-1547"></span> |
| <span class="source-line-no">1548</span><span id="line-1548"> /**</span> |
| <span class="source-line-no">1549</span><span id="line-1549"> * Updates the current block to be the given {@link HFileBlock}. Seeks to the the first</span> |
| <span class="source-line-no">1550</span><span id="line-1550"> * key/value pair.</span> |
| <span class="source-line-no">1551</span><span id="line-1551"> * @param newBlock the block to make current, and read by {@link HFileReaderImpl#readBlock},</span> |
| <span class="source-line-no">1552</span><span id="line-1552"> * it's a totally new block with new allocated {@link ByteBuff}, so if no</span> |
| <span class="source-line-no">1553</span><span id="line-1553"> * further reference to this block, we should release it carefully.</span> |
| <span class="source-line-no">1554</span><span id="line-1554"> */</span> |
| <span class="source-line-no">1555</span><span id="line-1555"> @Override</span> |
| <span class="source-line-no">1556</span><span id="line-1556"> protected void updateCurrentBlock(HFileBlock newBlock) throws CorruptHFileException {</span> |
| <span class="source-line-no">1557</span><span id="line-1557"> try {</span> |
| <span class="source-line-no">1558</span><span id="line-1558"> // sanity checks</span> |
| <span class="source-line-no">1559</span><span id="line-1559"> if (newBlock.getBlockType() != BlockType.ENCODED_DATA) {</span> |
| <span class="source-line-no">1560</span><span id="line-1560"> throw new IllegalStateException("EncodedScanner works only on encoded data blocks");</span> |
| <span class="source-line-no">1561</span><span id="line-1561"> }</span> |
| <span class="source-line-no">1562</span><span id="line-1562"> short dataBlockEncoderId = newBlock.getDataBlockEncodingId();</span> |
| <span class="source-line-no">1563</span><span id="line-1563"> if (!DataBlockEncoding.isCorrectEncoder(dataBlockEncoder, dataBlockEncoderId)) {</span> |
| <span class="source-line-no">1564</span><span id="line-1564"> String encoderCls = dataBlockEncoder.getClass().getName();</span> |
| <span class="source-line-no">1565</span><span id="line-1565"> throw new CorruptHFileException(</span> |
| <span class="source-line-no">1566</span><span id="line-1566"> "Encoder " + encoderCls + " doesn't support data block encoding "</span> |
| <span class="source-line-no">1567</span><span id="line-1567"> + DataBlockEncoding.getNameFromId(dataBlockEncoderId) + ",path=" + reader.getPath());</span> |
| <span class="source-line-no">1568</span><span id="line-1568"> }</span> |
| <span class="source-line-no">1569</span><span id="line-1569"> updateCurrBlockRef(newBlock);</span> |
| <span class="source-line-no">1570</span><span id="line-1570"> ByteBuff encodedBuffer = getEncodedBuffer(newBlock);</span> |
| <span class="source-line-no">1571</span><span id="line-1571"> seeker.setCurrentBuffer(encodedBuffer);</span> |
| <span class="source-line-no">1572</span><span id="line-1572"> } finally {</span> |
| <span class="source-line-no">1573</span><span id="line-1573"> releaseIfNotCurBlock(newBlock);</span> |
| <span class="source-line-no">1574</span><span id="line-1574"> }</span> |
| <span class="source-line-no">1575</span><span id="line-1575"> // Reset the next indexed key</span> |
| <span class="source-line-no">1576</span><span id="line-1576"> this.nextIndexedKey = null;</span> |
| <span class="source-line-no">1577</span><span id="line-1577"> }</span> |
| <span class="source-line-no">1578</span><span id="line-1578"></span> |
| <span class="source-line-no">1579</span><span id="line-1579"> private ByteBuff getEncodedBuffer(HFileBlock newBlock) {</span> |
| <span class="source-line-no">1580</span><span id="line-1580"> ByteBuff origBlock = newBlock.getBufferReadOnly();</span> |
| <span class="source-line-no">1581</span><span id="line-1581"> int pos = newBlock.headerSize() + DataBlockEncoding.ID_SIZE;</span> |
| <span class="source-line-no">1582</span><span id="line-1582"> origBlock.position(pos);</span> |
| <span class="source-line-no">1583</span><span id="line-1583"> origBlock</span> |
| <span class="source-line-no">1584</span><span id="line-1584"> .limit(pos + newBlock.getUncompressedSizeWithoutHeader() - DataBlockEncoding.ID_SIZE);</span> |
| <span class="source-line-no">1585</span><span id="line-1585"> return origBlock.slice();</span> |
| <span class="source-line-no">1586</span><span id="line-1586"> }</span> |
| <span class="source-line-no">1587</span><span id="line-1587"></span> |
| <span class="source-line-no">1588</span><span id="line-1588"> @Override</span> |
| <span class="source-line-no">1589</span><span id="line-1589"> protected boolean processFirstDataBlock() throws IOException {</span> |
| <span class="source-line-no">1590</span><span id="line-1590"> seeker.rewind();</span> |
| <span class="source-line-no">1591</span><span id="line-1591"> return true;</span> |
| <span class="source-line-no">1592</span><span id="line-1592"> }</span> |
| <span class="source-line-no">1593</span><span id="line-1593"></span> |
| <span class="source-line-no">1594</span><span id="line-1594"> @Override</span> |
| <span class="source-line-no">1595</span><span id="line-1595"> public boolean next() throws IOException {</span> |
| <span class="source-line-no">1596</span><span id="line-1596"> boolean isValid = seeker.next();</span> |
| <span class="source-line-no">1597</span><span id="line-1597"> if (!isValid) {</span> |
| <span class="source-line-no">1598</span><span id="line-1598"> HFileBlock newBlock = readNextDataBlock();</span> |
| <span class="source-line-no">1599</span><span id="line-1599"> isValid = newBlock != null;</span> |
| <span class="source-line-no">1600</span><span id="line-1600"> if (isValid) {</span> |
| <span class="source-line-no">1601</span><span id="line-1601"> updateCurrentBlock(newBlock);</span> |
| <span class="source-line-no">1602</span><span id="line-1602"> } else {</span> |
| <span class="source-line-no">1603</span><span id="line-1603"> setNonSeekedState();</span> |
| <span class="source-line-no">1604</span><span id="line-1604"> }</span> |
| <span class="source-line-no">1605</span><span id="line-1605"> }</span> |
| <span class="source-line-no">1606</span><span id="line-1606"> return isValid;</span> |
| <span class="source-line-no">1607</span><span id="line-1607"> }</span> |
| <span class="source-line-no">1608</span><span id="line-1608"></span> |
| <span class="source-line-no">1609</span><span id="line-1609"> @Override</span> |
| <span class="source-line-no">1610</span><span id="line-1610"> public ExtendedCell getKey() {</span> |
| <span class="source-line-no">1611</span><span id="line-1611"> assertValidSeek();</span> |
| <span class="source-line-no">1612</span><span id="line-1612"> return seeker.getKey();</span> |
| <span class="source-line-no">1613</span><span id="line-1613"> }</span> |
| <span class="source-line-no">1614</span><span id="line-1614"></span> |
| <span class="source-line-no">1615</span><span id="line-1615"> @Override</span> |
| <span class="source-line-no">1616</span><span id="line-1616"> public ByteBuffer getValue() {</span> |
| <span class="source-line-no">1617</span><span id="line-1617"> assertValidSeek();</span> |
| <span class="source-line-no">1618</span><span id="line-1618"> return seeker.getValueShallowCopy();</span> |
| <span class="source-line-no">1619</span><span id="line-1619"> }</span> |
| <span class="source-line-no">1620</span><span id="line-1620"></span> |
| <span class="source-line-no">1621</span><span id="line-1621"> @Override</span> |
| <span class="source-line-no">1622</span><span id="line-1622"> public ExtendedCell getCell() {</span> |
| <span class="source-line-no">1623</span><span id="line-1623"> if (this.curBlock == null) {</span> |
| <span class="source-line-no">1624</span><span id="line-1624"> return null;</span> |
| <span class="source-line-no">1625</span><span id="line-1625"> }</span> |
| <span class="source-line-no">1626</span><span id="line-1626"> return seeker.getCell();</span> |
| <span class="source-line-no">1627</span><span id="line-1627"> }</span> |
| <span class="source-line-no">1628</span><span id="line-1628"></span> |
| <span class="source-line-no">1629</span><span id="line-1629"> private void assertValidSeek() {</span> |
| <span class="source-line-no">1630</span><span id="line-1630"> if (this.curBlock == null) {</span> |
| <span class="source-line-no">1631</span><span id="line-1631"> throw new NotSeekedException(reader.getPath());</span> |
| <span class="source-line-no">1632</span><span id="line-1632"> }</span> |
| <span class="source-line-no">1633</span><span id="line-1633"> }</span> |
| <span class="source-line-no">1634</span><span id="line-1634"></span> |
| <span class="source-line-no">1635</span><span id="line-1635"> @Override</span> |
| <span class="source-line-no">1636</span><span id="line-1636"> protected ExtendedCell getFirstKeyCellInBlock(HFileBlock curBlock) {</span> |
| <span class="source-line-no">1637</span><span id="line-1637"> return dataBlockEncoder.getFirstKeyCellInBlock(getEncodedBuffer(curBlock));</span> |
| <span class="source-line-no">1638</span><span id="line-1638"> }</span> |
| <span class="source-line-no">1639</span><span id="line-1639"></span> |
| <span class="source-line-no">1640</span><span id="line-1640"> @Override</span> |
| <span class="source-line-no">1641</span><span id="line-1641"> protected int loadBlockAndSeekToKey(HFileBlock seekToBlock, ExtendedCell nextIndexedKey,</span> |
| <span class="source-line-no">1642</span><span id="line-1642"> boolean rewind, ExtendedCell key, boolean seekBefore) throws IOException {</span> |
| <span class="source-line-no">1643</span><span id="line-1643"> if (this.curBlock == null || this.curBlock.getOffset() != seekToBlock.getOffset()) {</span> |
| <span class="source-line-no">1644</span><span id="line-1644"> updateCurrentBlock(seekToBlock);</span> |
| <span class="source-line-no">1645</span><span id="line-1645"> } else if (rewind) {</span> |
| <span class="source-line-no">1646</span><span id="line-1646"> seeker.rewind();</span> |
| <span class="source-line-no">1647</span><span id="line-1647"> }</span> |
| <span class="source-line-no">1648</span><span id="line-1648"> this.nextIndexedKey = nextIndexedKey;</span> |
| <span class="source-line-no">1649</span><span id="line-1649"> return seeker.seekToKeyInBlock(key, seekBefore);</span> |
| <span class="source-line-no">1650</span><span id="line-1650"> }</span> |
| <span class="source-line-no">1651</span><span id="line-1651"></span> |
| <span class="source-line-no">1652</span><span id="line-1652"> @Override</span> |
| <span class="source-line-no">1653</span><span id="line-1653"> public int compareKey(CellComparator comparator, ExtendedCell key) {</span> |
| <span class="source-line-no">1654</span><span id="line-1654"> return seeker.compareKey(comparator, key);</span> |
| <span class="source-line-no">1655</span><span id="line-1655"> }</span> |
| <span class="source-line-no">1656</span><span id="line-1656"> }</span> |
| <span class="source-line-no">1657</span><span id="line-1657"></span> |
| <span class="source-line-no">1658</span><span id="line-1658"> /**</span> |
| <span class="source-line-no">1659</span><span id="line-1659"> * Returns a buffer with the Bloom filter metadata. The caller takes ownership of the buffer.</span> |
| <span class="source-line-no">1660</span><span id="line-1660"> */</span> |
| <span class="source-line-no">1661</span><span id="line-1661"> @Override</span> |
| <span class="source-line-no">1662</span><span id="line-1662"> public DataInput getGeneralBloomFilterMetadata() throws IOException {</span> |
| <span class="source-line-no">1663</span><span id="line-1663"> return this.getBloomFilterMetadata(BlockType.GENERAL_BLOOM_META);</span> |
| <span class="source-line-no">1664</span><span id="line-1664"> }</span> |
| <span class="source-line-no">1665</span><span id="line-1665"></span> |
| <span class="source-line-no">1666</span><span id="line-1666"> @Override</span> |
| <span class="source-line-no">1667</span><span id="line-1667"> public DataInput getDeleteBloomFilterMetadata() throws IOException {</span> |
| <span class="source-line-no">1668</span><span id="line-1668"> return this.getBloomFilterMetadata(BlockType.DELETE_FAMILY_BLOOM_META);</span> |
| <span class="source-line-no">1669</span><span id="line-1669"> }</span> |
| <span class="source-line-no">1670</span><span id="line-1670"></span> |
| <span class="source-line-no">1671</span><span id="line-1671"> private DataInput getBloomFilterMetadata(BlockType blockType) throws IOException {</span> |
| <span class="source-line-no">1672</span><span id="line-1672"> if (</span> |
| <span class="source-line-no">1673</span><span id="line-1673"> blockType != BlockType.GENERAL_BLOOM_META && blockType != BlockType.DELETE_FAMILY_BLOOM_META</span> |
| <span class="source-line-no">1674</span><span id="line-1674"> ) {</span> |
| <span class="source-line-no">1675</span><span id="line-1675"> throw new RuntimeException(</span> |
| <span class="source-line-no">1676</span><span id="line-1676"> "Block Type: " + blockType.toString() + " is not supported, path=" + path);</span> |
| <span class="source-line-no">1677</span><span id="line-1677"> }</span> |
| <span class="source-line-no">1678</span><span id="line-1678"></span> |
| <span class="source-line-no">1679</span><span id="line-1679"> for (HFileBlock b : fileInfo.getLoadOnOpenBlocks()) {</span> |
| <span class="source-line-no">1680</span><span id="line-1680"> if (b.getBlockType() == blockType) {</span> |
| <span class="source-line-no">1681</span><span id="line-1681"> return b.getByteStream();</span> |
| <span class="source-line-no">1682</span><span id="line-1682"> }</span> |
| <span class="source-line-no">1683</span><span id="line-1683"> }</span> |
| <span class="source-line-no">1684</span><span id="line-1684"> return null;</span> |
| <span class="source-line-no">1685</span><span id="line-1685"> }</span> |
| <span class="source-line-no">1686</span><span id="line-1686"></span> |
| <span class="source-line-no">1687</span><span id="line-1687"> public boolean isFileInfoLoaded() {</span> |
| <span class="source-line-no">1688</span><span id="line-1688"> return true; // We load file info in constructor in version 2.</span> |
| <span class="source-line-no">1689</span><span id="line-1689"> }</span> |
| <span class="source-line-no">1690</span><span id="line-1690"></span> |
| <span class="source-line-no">1691</span><span id="line-1691"> @Override</span> |
| <span class="source-line-no">1692</span><span id="line-1692"> public HFileContext getFileContext() {</span> |
| <span class="source-line-no">1693</span><span id="line-1693"> return hfileContext;</span> |
| <span class="source-line-no">1694</span><span id="line-1694"> }</span> |
| <span class="source-line-no">1695</span><span id="line-1695"></span> |
| <span class="source-line-no">1696</span><span id="line-1696"> /**</span> |
| <span class="source-line-no">1697</span><span id="line-1697"> * Returns false if block prefetching was requested for this file and has not completed, true</span> |
| <span class="source-line-no">1698</span><span id="line-1698"> * otherwise</span> |
| <span class="source-line-no">1699</span><span id="line-1699"> */</span> |
| <span class="source-line-no">1700</span><span id="line-1700"> @Override</span> |
| <span class="source-line-no">1701</span><span id="line-1701"> public boolean prefetchComplete() {</span> |
| <span class="source-line-no">1702</span><span id="line-1702"> return PrefetchExecutor.isCompleted(path);</span> |
| <span class="source-line-no">1703</span><span id="line-1703"> }</span> |
| <span class="source-line-no">1704</span><span id="line-1704"></span> |
| <span class="source-line-no">1705</span><span id="line-1705"> /**</span> |
| <span class="source-line-no">1706</span><span id="line-1706"> * Returns true if block prefetching was started after waiting for specified delay, false</span> |
| <span class="source-line-no">1707</span><span id="line-1707"> * otherwise</span> |
| <span class="source-line-no">1708</span><span id="line-1708"> */</span> |
| <span class="source-line-no">1709</span><span id="line-1709"> @Override</span> |
| <span class="source-line-no">1710</span><span id="line-1710"> public boolean prefetchStarted() {</span> |
| <span class="source-line-no">1711</span><span id="line-1711"> return PrefetchExecutor.isPrefetchStarted();</span> |
| <span class="source-line-no">1712</span><span id="line-1712"> }</span> |
| <span class="source-line-no">1713</span><span id="line-1713"></span> |
| <span class="source-line-no">1714</span><span id="line-1714"> /**</span> |
| <span class="source-line-no">1715</span><span id="line-1715"> * Create a Scanner on this file. No seeks or reads are done on creation. Call</span> |
| <span class="source-line-no">1716</span><span id="line-1716"> * {@link HFileScanner#seekTo(ExtendedCell)} to position an start the read. There is nothing to</span> |
| <span class="source-line-no">1717</span><span id="line-1717"> * clean up in a Scanner. Letting go of your references to the scanner is sufficient. NOTE: Do not</span> |
| <span class="source-line-no">1718</span><span id="line-1718"> * use this overload of getScanner for compactions. See</span> |
| <span class="source-line-no">1719</span><span id="line-1719"> * {@link #getScanner(Configuration, boolean, boolean, boolean)}</span> |
| <span class="source-line-no">1720</span><span id="line-1720"> * @param conf Store configuration.</span> |
| <span class="source-line-no">1721</span><span id="line-1721"> * @param cacheBlocks True if we should cache blocks read in by this scanner.</span> |
| <span class="source-line-no">1722</span><span id="line-1722"> * @param pread Use positional read rather than seek+read if true (pread is better for</span> |
| <span class="source-line-no">1723</span><span id="line-1723"> * random reads, seek+read is better scanning).</span> |
| <span class="source-line-no">1724</span><span id="line-1724"> * @return Scanner on this file.</span> |
| <span class="source-line-no">1725</span><span id="line-1725"> */</span> |
| <span class="source-line-no">1726</span><span id="line-1726"> @Override</span> |
| <span class="source-line-no">1727</span><span id="line-1727"> public HFileScanner getScanner(Configuration conf, boolean cacheBlocks, final boolean pread) {</span> |
| <span class="source-line-no">1728</span><span id="line-1728"> return getScanner(conf, cacheBlocks, pread, false);</span> |
| <span class="source-line-no">1729</span><span id="line-1729"> }</span> |
| <span class="source-line-no">1730</span><span id="line-1730"></span> |
| <span class="source-line-no">1731</span><span id="line-1731"> /**</span> |
| <span class="source-line-no">1732</span><span id="line-1732"> * Create a Scanner on this file. No seeks or reads are done on creation. Call</span> |
| <span class="source-line-no">1733</span><span id="line-1733"> * {@link HFileScanner#seekTo(ExtendedCell)} to position an start the read. There is nothing to</span> |
| <span class="source-line-no">1734</span><span id="line-1734"> * clean up in a Scanner. Letting go of your references to the scanner is sufficient.</span> |
| <span class="source-line-no">1735</span><span id="line-1735"> * @param conf Store configuration.</span> |
| <span class="source-line-no">1736</span><span id="line-1736"> * @param cacheBlocks True if we should cache blocks read in by this scanner.</span> |
| <span class="source-line-no">1737</span><span id="line-1737"> * @param pread Use positional read rather than seek+read if true (pread is better for</span> |
| <span class="source-line-no">1738</span><span id="line-1738"> * random reads, seek+read is better scanning).</span> |
| <span class="source-line-no">1739</span><span id="line-1739"> * @param isCompaction is scanner being used for a compaction?</span> |
| <span class="source-line-no">1740</span><span id="line-1740"> * @return Scanner on this file.</span> |
| <span class="source-line-no">1741</span><span id="line-1741"> */</span> |
| <span class="source-line-no">1742</span><span id="line-1742"> @Override</span> |
| <span class="source-line-no">1743</span><span id="line-1743"> public HFileScanner getScanner(Configuration conf, boolean cacheBlocks, final boolean pread,</span> |
| <span class="source-line-no">1744</span><span id="line-1744"> final boolean isCompaction) {</span> |
| <span class="source-line-no">1745</span><span id="line-1745"> if (dataBlockEncoder.useEncodedScanner()) {</span> |
| <span class="source-line-no">1746</span><span id="line-1746"> return new EncodedScanner(this, cacheBlocks, pread, isCompaction, this.hfileContext, conf);</span> |
| <span class="source-line-no">1747</span><span id="line-1747"> }</span> |
| <span class="source-line-no">1748</span><span id="line-1748"> return new HFileScannerImpl(this, cacheBlocks, pread, isCompaction);</span> |
| <span class="source-line-no">1749</span><span id="line-1749"> }</span> |
| <span class="source-line-no">1750</span><span id="line-1750"></span> |
| <span class="source-line-no">1751</span><span id="line-1751"> public int getMajorVersion() {</span> |
| <span class="source-line-no">1752</span><span id="line-1752"> return 3;</span> |
| <span class="source-line-no">1753</span><span id="line-1753"> }</span> |
| <span class="source-line-no">1754</span><span id="line-1754"></span> |
| <span class="source-line-no">1755</span><span id="line-1755"> @Override</span> |
| <span class="source-line-no">1756</span><span id="line-1756"> public void unbufferStream() {</span> |
| <span class="source-line-no">1757</span><span id="line-1757"> fsBlockReader.unbufferStream();</span> |
| <span class="source-line-no">1758</span><span id="line-1758"> }</span> |
| <span class="source-line-no">1759</span><span id="line-1759">}</span> |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| </pre> |
| </div> |
| </main> |
| </body> |
| </html> |
