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| <pre><span class="source-line-no">001</span><span id="line-1">/*</span> |
| <span class="source-line-no">002</span><span id="line-2"> * Licensed to the Apache Software Foundation (ASF) under one</span> |
| <span class="source-line-no">003</span><span id="line-3"> * or more contributor license agreements. See the NOTICE file</span> |
| <span class="source-line-no">004</span><span id="line-4"> * distributed with this work for additional information</span> |
| <span class="source-line-no">005</span><span id="line-5"> * regarding copyright ownership. The ASF licenses this file</span> |
| <span class="source-line-no">006</span><span id="line-6"> * to you under the Apache License, Version 2.0 (the</span> |
| <span class="source-line-no">007</span><span id="line-7"> * "License"); you may not use this file except in compliance</span> |
| <span class="source-line-no">008</span><span id="line-8"> * with the License. You may obtain a copy of the License at</span> |
| <span class="source-line-no">009</span><span id="line-9"> *</span> |
| <span class="source-line-no">010</span><span id="line-10"> * http://www.apache.org/licenses/LICENSE-2.0</span> |
| <span class="source-line-no">011</span><span id="line-11"> *</span> |
| <span class="source-line-no">012</span><span id="line-12"> * Unless required by applicable law or agreed to in writing, software</span> |
| <span class="source-line-no">013</span><span id="line-13"> * distributed under the License is distributed on an "AS IS" BASIS,</span> |
| <span class="source-line-no">014</span><span id="line-14"> * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.</span> |
| <span class="source-line-no">015</span><span id="line-15"> * See the License for the specific language governing permissions and</span> |
| <span class="source-line-no">016</span><span id="line-16"> * limitations under the License.</span> |
| <span class="source-line-no">017</span><span id="line-17"> */</span> |
| <span class="source-line-no">018</span><span id="line-18">package org.apache.hadoop.hbase.io.hfile;</span> |
| <span class="source-line-no">019</span><span id="line-19"></span> |
| <span class="source-line-no">020</span><span id="line-20">import 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.HConstants;</span> |
| <span class="source-line-no">039</span><span id="line-39">import org.apache.hadoop.hbase.KeyValue;</span> |
| <span class="source-line-no">040</span><span id="line-40">import org.apache.hadoop.hbase.PrivateCellUtil;</span> |
| <span class="source-line-no">041</span><span id="line-41">import org.apache.hadoop.hbase.SizeCachedByteBufferKeyValue;</span> |
| <span class="source-line-no">042</span><span id="line-42">import org.apache.hadoop.hbase.SizeCachedKeyValue;</span> |
| <span class="source-line-no">043</span><span id="line-43">import org.apache.hadoop.hbase.SizeCachedNoTagsByteBufferKeyValue;</span> |
| <span class="source-line-no">044</span><span id="line-44">import org.apache.hadoop.hbase.SizeCachedNoTagsKeyValue;</span> |
| <span class="source-line-no">045</span><span id="line-45">import org.apache.hadoop.hbase.io.compress.Compression;</span> |
| <span class="source-line-no">046</span><span id="line-46">import org.apache.hadoop.hbase.io.encoding.DataBlockEncoder;</span> |
| <span class="source-line-no">047</span><span id="line-47">import org.apache.hadoop.hbase.io.encoding.DataBlockEncoding;</span> |
| <span class="source-line-no">048</span><span id="line-48">import org.apache.hadoop.hbase.io.encoding.HFileBlockDecodingContext;</span> |
| <span class="source-line-no">049</span><span id="line-49">import org.apache.hadoop.hbase.nio.ByteBuff;</span> |
| <span class="source-line-no">050</span><span id="line-50">import org.apache.hadoop.hbase.regionserver.KeyValueScanner;</span> |
| <span class="source-line-no">051</span><span id="line-51">import org.apache.hadoop.hbase.util.ByteBufferUtils;</span> |
| <span class="source-line-no">052</span><span id="line-52">import org.apache.hadoop.hbase.util.Bytes;</span> |
| <span class="source-line-no">053</span><span id="line-53">import org.apache.hadoop.hbase.util.IdLock;</span> |
| <span class="source-line-no">054</span><span id="line-54">import org.apache.hadoop.hbase.util.ObjectIntPair;</span> |
| <span class="source-line-no">055</span><span id="line-55">import org.apache.hadoop.io.WritableUtils;</span> |
| <span class="source-line-no">056</span><span id="line-56">import org.apache.yetus.audience.InterfaceAudience;</span> |
| <span class="source-line-no">057</span><span id="line-57">import org.slf4j.Logger;</span> |
| <span class="source-line-no">058</span><span id="line-58">import org.slf4j.LoggerFactory;</span> |
| <span class="source-line-no">059</span><span id="line-59"></span> |
| <span class="source-line-no">060</span><span id="line-60">/**</span> |
| <span class="source-line-no">061</span><span id="line-61"> * Implementation that can handle all hfile versions of {@link HFile.Reader}.</span> |
| <span class="source-line-no">062</span><span id="line-62"> */</span> |
| <span class="source-line-no">063</span><span id="line-63">@InterfaceAudience.Private</span> |
| <span class="source-line-no">064</span><span id="line-64">@edu.umd.cs.findbugs.annotations.SuppressWarnings(value = "URF_UNREAD_PUBLIC_OR_PROTECTED_FIELD")</span> |
| <span class="source-line-no">065</span><span id="line-65">public abstract class HFileReaderImpl implements HFile.Reader, Configurable {</span> |
| <span class="source-line-no">066</span><span id="line-66"> // This class is HFileReaderV3 + HFileReaderV2 + AbstractHFileReader all squashed together into</span> |
| <span class="source-line-no">067</span><span id="line-67"> // one file. Ditto for all the HFileReader.ScannerV? implementations. I was running up against</span> |
| <span class="source-line-no">068</span><span id="line-68"> // the MaxInlineLevel limit because too many tiers involved reading from an hfile. Was also hard</span> |
| <span class="source-line-no">069</span><span id="line-69"> // to navigate the source code when so many classes participating in read.</span> |
| <span class="source-line-no">070</span><span id="line-70"> private static final Logger LOG = LoggerFactory.getLogger(HFileReaderImpl.class);</span> |
| <span class="source-line-no">071</span><span id="line-71"></span> |
| <span class="source-line-no">072</span><span id="line-72"> /** Data block index reader keeping the root data index in memory */</span> |
| <span class="source-line-no">073</span><span id="line-73"> protected HFileBlockIndex.CellBasedKeyBlockIndexReader dataBlockIndexReader;</span> |
| <span class="source-line-no">074</span><span id="line-74"></span> |
| <span class="source-line-no">075</span><span id="line-75"> /** Meta block index reader -- always single level */</span> |
| <span class="source-line-no">076</span><span id="line-76"> protected HFileBlockIndex.ByteArrayKeyBlockIndexReader metaBlockIndexReader;</span> |
| <span class="source-line-no">077</span><span id="line-77"></span> |
| <span class="source-line-no">078</span><span id="line-78"> protected FixedFileTrailer trailer;</span> |
| <span class="source-line-no">079</span><span id="line-79"></span> |
| <span class="source-line-no">080</span><span id="line-80"> private final boolean primaryReplicaReader;</span> |
| <span class="source-line-no">081</span><span id="line-81"></span> |
| <span class="source-line-no">082</span><span id="line-82"> /**</span> |
| <span class="source-line-no">083</span><span id="line-83"> * What kind of data block encoding should be used while reading, writing, and handling cache.</span> |
| <span class="source-line-no">084</span><span id="line-84"> */</span> |
| <span class="source-line-no">085</span><span id="line-85"> protected HFileDataBlockEncoder dataBlockEncoder = NoOpDataBlockEncoder.INSTANCE;</span> |
| <span class="source-line-no">086</span><span id="line-86"></span> |
| <span class="source-line-no">087</span><span id="line-87"> /** Block cache configuration. */</span> |
| <span class="source-line-no">088</span><span id="line-88"> protected final CacheConfig cacheConf;</span> |
| <span class="source-line-no">089</span><span id="line-89"></span> |
| <span class="source-line-no">090</span><span id="line-90"> protected ReaderContext context;</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 final HFileInfo fileInfo;</span> |
| <span class="source-line-no">093</span><span id="line-93"></span> |
| <span class="source-line-no">094</span><span id="line-94"> /** Path of file */</span> |
| <span class="source-line-no">095</span><span id="line-95"> protected final Path path;</span> |
| <span class="source-line-no">096</span><span id="line-96"></span> |
| <span class="source-line-no">097</span><span id="line-97"> /** File name to be used for block names */</span> |
| <span class="source-line-no">098</span><span id="line-98"> protected final String name;</span> |
| <span class="source-line-no">099</span><span id="line-99"></span> |
| <span class="source-line-no">100</span><span id="line-100"> private Configuration conf;</span> |
| <span class="source-line-no">101</span><span id="line-101"></span> |
| <span class="source-line-no">102</span><span id="line-102"> protected HFileContext hfileContext;</span> |
| <span class="source-line-no">103</span><span id="line-103"></span> |
| <span class="source-line-no">104</span><span id="line-104"> /** Filesystem-level block reader. */</span> |
| <span class="source-line-no">105</span><span id="line-105"> protected HFileBlock.FSReader fsBlockReader;</span> |
| <span class="source-line-no">106</span><span id="line-106"></span> |
| <span class="source-line-no">107</span><span id="line-107"> /**</span> |
| <span class="source-line-no">108</span><span id="line-108"> * A "sparse lock" implementation allowing to lock on a particular block identified by offset. The</span> |
| <span class="source-line-no">109</span><span id="line-109"> * purpose of this is to avoid two clients loading the same block, and have all but one client</span> |
| <span class="source-line-no">110</span><span id="line-110"> * wait to get the block from the cache.</span> |
| <span class="source-line-no">111</span><span id="line-111"> */</span> |
| <span class="source-line-no">112</span><span id="line-112"> private IdLock offsetLock = new IdLock();</span> |
| <span class="source-line-no">113</span><span id="line-113"></span> |
| <span class="source-line-no">114</span><span id="line-114"> /** Minimum minor version supported by this HFile format */</span> |
| <span class="source-line-no">115</span><span id="line-115"> static final int MIN_MINOR_VERSION = 0;</span> |
| <span class="source-line-no">116</span><span id="line-116"></span> |
| <span class="source-line-no">117</span><span id="line-117"> /** Maximum minor version supported by this HFile format */</span> |
| <span class="source-line-no">118</span><span id="line-118"> // We went to version 2 when we moved to pb'ing fileinfo and the trailer on</span> |
| <span class="source-line-no">119</span><span id="line-119"> // the file. This version can read Writables version 1.</span> |
| <span class="source-line-no">120</span><span id="line-120"> static final int MAX_MINOR_VERSION = 3;</span> |
| <span class="source-line-no">121</span><span id="line-121"></span> |
| <span class="source-line-no">122</span><span id="line-122"> /** Minor versions starting with this number have faked index key */</span> |
| <span class="source-line-no">123</span><span id="line-123"> static final int MINOR_VERSION_WITH_FAKED_KEY = 3;</span> |
| <span class="source-line-no">124</span><span id="line-124"></span> |
| <span class="source-line-no">125</span><span id="line-125"> /**</span> |
| <span class="source-line-no">126</span><span id="line-126"> * Opens a HFile.</span> |
| <span class="source-line-no">127</span><span id="line-127"> * @param context Reader context info</span> |
| <span class="source-line-no">128</span><span id="line-128"> * @param fileInfo HFile info</span> |
| <span class="source-line-no">129</span><span id="line-129"> * @param cacheConf Cache configuration.</span> |
| <span class="source-line-no">130</span><span id="line-130"> * @param conf Configuration</span> |
| <span class="source-line-no">131</span><span id="line-131"> */</span> |
| <span class="source-line-no">132</span><span id="line-132"> @edu.umd.cs.findbugs.annotations.SuppressWarnings(value = "URF_UNREAD_PUBLIC_OR_PROTECTED_FIELD")</span> |
| <span class="source-line-no">133</span><span id="line-133"> public HFileReaderImpl(ReaderContext context, HFileInfo fileInfo, CacheConfig cacheConf,</span> |
| <span class="source-line-no">134</span><span id="line-134"> Configuration conf) throws IOException {</span> |
| <span class="source-line-no">135</span><span id="line-135"> this.cacheConf = cacheConf;</span> |
| <span class="source-line-no">136</span><span id="line-136"> this.context = context;</span> |
| <span class="source-line-no">137</span><span id="line-137"> this.path = context.getFilePath();</span> |
| <span class="source-line-no">138</span><span id="line-138"> this.name = path.getName();</span> |
| <span class="source-line-no">139</span><span id="line-139"> this.conf = conf;</span> |
| <span class="source-line-no">140</span><span id="line-140"> this.primaryReplicaReader = context.isPrimaryReplicaReader();</span> |
| <span class="source-line-no">141</span><span id="line-141"> this.fileInfo = fileInfo;</span> |
| <span class="source-line-no">142</span><span id="line-142"> this.trailer = fileInfo.getTrailer();</span> |
| <span class="source-line-no">143</span><span id="line-143"> this.hfileContext = fileInfo.getHFileContext();</span> |
| <span class="source-line-no">144</span><span id="line-144"> this.fsBlockReader =</span> |
| <span class="source-line-no">145</span><span id="line-145"> new HFileBlock.FSReaderImpl(context, hfileContext, cacheConf.getByteBuffAllocator(), conf);</span> |
| <span class="source-line-no">146</span><span id="line-146"> this.dataBlockEncoder = HFileDataBlockEncoderImpl.createFromFileInfo(fileInfo);</span> |
| <span class="source-line-no">147</span><span id="line-147"> fsBlockReader.setDataBlockEncoder(dataBlockEncoder, conf);</span> |
| <span class="source-line-no">148</span><span id="line-148"> dataBlockIndexReader = fileInfo.getDataBlockIndexReader();</span> |
| <span class="source-line-no">149</span><span id="line-149"> metaBlockIndexReader = fileInfo.getMetaBlockIndexReader();</span> |
| <span class="source-line-no">150</span><span id="line-150"> }</span> |
| <span class="source-line-no">151</span><span id="line-151"></span> |
| <span class="source-line-no">152</span><span id="line-152"> @SuppressWarnings("serial")</span> |
| <span class="source-line-no">153</span><span id="line-153"> public static class BlockIndexNotLoadedException extends IllegalStateException {</span> |
| <span class="source-line-no">154</span><span id="line-154"> public BlockIndexNotLoadedException(Path path) {</span> |
| <span class="source-line-no">155</span><span id="line-155"> // Add a message in case anyone relies on it as opposed to class name.</span> |
| <span class="source-line-no">156</span><span id="line-156"> super(path + " block index not loaded");</span> |
| <span class="source-line-no">157</span><span id="line-157"> }</span> |
| <span class="source-line-no">158</span><span id="line-158"> }</span> |
| <span class="source-line-no">159</span><span id="line-159"></span> |
| <span class="source-line-no">160</span><span id="line-160"> public CacheConfig getCacheConf() {</span> |
| <span class="source-line-no">161</span><span id="line-161"> return cacheConf;</span> |
| <span class="source-line-no">162</span><span id="line-162"> }</span> |
| <span class="source-line-no">163</span><span id="line-163"></span> |
| <span class="source-line-no">164</span><span id="line-164"> private Optional<String> toStringFirstKey() {</span> |
| <span class="source-line-no">165</span><span id="line-165"> return getFirstKey().map(CellUtil::getCellKeyAsString);</span> |
| <span class="source-line-no">166</span><span id="line-166"> }</span> |
| <span class="source-line-no">167</span><span id="line-167"></span> |
| <span class="source-line-no">168</span><span id="line-168"> private Optional<String> toStringLastKey() {</span> |
| <span class="source-line-no">169</span><span id="line-169"> return getLastKey().map(CellUtil::getCellKeyAsString);</span> |
| <span class="source-line-no">170</span><span id="line-170"> }</span> |
| <span class="source-line-no">171</span><span id="line-171"></span> |
| <span class="source-line-no">172</span><span id="line-172"> @Override</span> |
| <span class="source-line-no">173</span><span id="line-173"> public String toString() {</span> |
| <span class="source-line-no">174</span><span id="line-174"> return "reader=" + path.toString()</span> |
| <span class="source-line-no">175</span><span id="line-175"> + (!isFileInfoLoaded()</span> |
| <span class="source-line-no">176</span><span id="line-176"> ? ""</span> |
| <span class="source-line-no">177</span><span id="line-177"> : ", compression=" + trailer.getCompressionCodec().getName() + ", cacheConf=" + cacheConf</span> |
| <span class="source-line-no">178</span><span id="line-178"> + ", firstKey=" + toStringFirstKey() + ", lastKey=" + toStringLastKey())</span> |
| <span class="source-line-no">179</span><span id="line-179"> + ", avgKeyLen=" + fileInfo.getAvgKeyLen() + ", avgValueLen=" + fileInfo.getAvgValueLen()</span> |
| <span class="source-line-no">180</span><span id="line-180"> + ", entries=" + trailer.getEntryCount() + ", length=" + context.getFileSize();</span> |
| <span class="source-line-no">181</span><span id="line-181"> }</span> |
| <span class="source-line-no">182</span><span id="line-182"></span> |
| <span class="source-line-no">183</span><span id="line-183"> @Override</span> |
| <span class="source-line-no">184</span><span id="line-184"> public long length() {</span> |
| <span class="source-line-no">185</span><span id="line-185"> return context.getFileSize();</span> |
| <span class="source-line-no">186</span><span id="line-186"> }</span> |
| <span class="source-line-no">187</span><span id="line-187"></span> |
| <span class="source-line-no">188</span><span id="line-188"> /**</span> |
| <span class="source-line-no">189</span><span id="line-189"> * @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">190</span><span id="line-190"> * the first row key, but rather the byte form of the first KeyValue.</span> |
| <span class="source-line-no">191</span><span id="line-191"> */</span> |
| <span class="source-line-no">192</span><span id="line-192"> @Override</span> |
| <span class="source-line-no">193</span><span id="line-193"> public Optional<ExtendedCell> getFirstKey() {</span> |
| <span class="source-line-no">194</span><span id="line-194"> if (dataBlockIndexReader == null) {</span> |
| <span class="source-line-no">195</span><span id="line-195"> throw new BlockIndexNotLoadedException(path);</span> |
| <span class="source-line-no">196</span><span id="line-196"> }</span> |
| <span class="source-line-no">197</span><span id="line-197"> return dataBlockIndexReader.isEmpty()</span> |
| <span class="source-line-no">198</span><span id="line-198"> ? Optional.empty()</span> |
| <span class="source-line-no">199</span><span id="line-199"> : Optional.of(dataBlockIndexReader.getRootBlockKey(0));</span> |
| <span class="source-line-no">200</span><span id="line-200"> }</span> |
| <span class="source-line-no">201</span><span id="line-201"></span> |
| <span class="source-line-no">202</span><span id="line-202"> /**</span> |
| <span class="source-line-no">203</span><span id="line-203"> * TODO left from {@link HFile} version 1: move this to StoreFile after Ryan's patch goes in to</span> |
| <span class="source-line-no">204</span><span id="line-204"> * eliminate {@link KeyValue} here.</span> |
| <span class="source-line-no">205</span><span id="line-205"> * @return the first row key, or null if the file is empty.</span> |
| <span class="source-line-no">206</span><span id="line-206"> */</span> |
| <span class="source-line-no">207</span><span id="line-207"> @Override</span> |
| <span class="source-line-no">208</span><span id="line-208"> public Optional<byte[]> getFirstRowKey() {</span> |
| <span class="source-line-no">209</span><span id="line-209"> // We have to copy the row part to form the row key alone</span> |
| <span class="source-line-no">210</span><span id="line-210"> return getFirstKey().map(CellUtil::cloneRow);</span> |
| <span class="source-line-no">211</span><span id="line-211"> }</span> |
| <span class="source-line-no">212</span><span id="line-212"></span> |
| <span class="source-line-no">213</span><span id="line-213"> /**</span> |
| <span class="source-line-no">214</span><span id="line-214"> * TODO left from {@link HFile} version 1: move this to StoreFile after Ryan's patch goes in to</span> |
| <span class="source-line-no">215</span><span id="line-215"> * eliminate {@link KeyValue} here.</span> |
| <span class="source-line-no">216</span><span id="line-216"> * @return the last row key, or null if the file is empty.</span> |
| <span class="source-line-no">217</span><span id="line-217"> */</span> |
| <span class="source-line-no">218</span><span id="line-218"> @Override</span> |
| <span class="source-line-no">219</span><span id="line-219"> public Optional<byte[]> getLastRowKey() {</span> |
| <span class="source-line-no">220</span><span id="line-220"> // We have to copy the row part to form the row key alone</span> |
| <span class="source-line-no">221</span><span id="line-221"> return getLastKey().map(CellUtil::cloneRow);</span> |
| <span class="source-line-no">222</span><span id="line-222"> }</span> |
| <span class="source-line-no">223</span><span id="line-223"></span> |
| <span class="source-line-no">224</span><span id="line-224"> /** Returns number of KV entries in this HFile */</span> |
| <span class="source-line-no">225</span><span id="line-225"> @Override</span> |
| <span class="source-line-no">226</span><span id="line-226"> public long getEntries() {</span> |
| <span class="source-line-no">227</span><span id="line-227"> return trailer.getEntryCount();</span> |
| <span class="source-line-no">228</span><span id="line-228"> }</span> |
| <span class="source-line-no">229</span><span id="line-229"></span> |
| <span class="source-line-no">230</span><span id="line-230"> /** Returns comparator */</span> |
| <span class="source-line-no">231</span><span id="line-231"> @Override</span> |
| <span class="source-line-no">232</span><span id="line-232"> public CellComparator getComparator() {</span> |
| <span class="source-line-no">233</span><span id="line-233"> return this.hfileContext.getCellComparator();</span> |
| <span class="source-line-no">234</span><span id="line-234"> }</span> |
| <span class="source-line-no">235</span><span id="line-235"></span> |
| <span class="source-line-no">236</span><span id="line-236"> public Compression.Algorithm getCompressionAlgorithm() {</span> |
| <span class="source-line-no">237</span><span id="line-237"> return trailer.getCompressionCodec();</span> |
| <span class="source-line-no">238</span><span id="line-238"> }</span> |
| <span class="source-line-no">239</span><span id="line-239"></span> |
| <span class="source-line-no">240</span><span id="line-240"> /**</span> |
| <span class="source-line-no">241</span><span id="line-241"> * @return the total heap size of data and meta block indexes in bytes. Does not take into account</span> |
| <span class="source-line-no">242</span><span id="line-242"> * non-root blocks of a multilevel data index.</span> |
| <span class="source-line-no">243</span><span id="line-243"> */</span> |
| <span class="source-line-no">244</span><span id="line-244"> @Override</span> |
| <span class="source-line-no">245</span><span id="line-245"> public long indexSize() {</span> |
| <span class="source-line-no">246</span><span id="line-246"> return (dataBlockIndexReader != null ? dataBlockIndexReader.heapSize() : 0)</span> |
| <span class="source-line-no">247</span><span id="line-247"> + ((metaBlockIndexReader != null) ? metaBlockIndexReader.heapSize() : 0);</span> |
| <span class="source-line-no">248</span><span id="line-248"> }</span> |
| <span class="source-line-no">249</span><span id="line-249"></span> |
| <span class="source-line-no">250</span><span id="line-250"> @Override</span> |
| <span class="source-line-no">251</span><span id="line-251"> public String getName() {</span> |
| <span class="source-line-no">252</span><span id="line-252"> return name;</span> |
| <span class="source-line-no">253</span><span id="line-253"> }</span> |
| <span class="source-line-no">254</span><span id="line-254"></span> |
| <span class="source-line-no">255</span><span id="line-255"> @Override</span> |
| <span class="source-line-no">256</span><span id="line-256"> public void setDataBlockEncoder(HFileDataBlockEncoder dataBlockEncoder) {</span> |
| <span class="source-line-no">257</span><span id="line-257"> this.dataBlockEncoder = dataBlockEncoder;</span> |
| <span class="source-line-no">258</span><span id="line-258"> this.fsBlockReader.setDataBlockEncoder(dataBlockEncoder, conf);</span> |
| <span class="source-line-no">259</span><span id="line-259"> }</span> |
| <span class="source-line-no">260</span><span id="line-260"></span> |
| <span class="source-line-no">261</span><span id="line-261"> @Override</span> |
| <span class="source-line-no">262</span><span id="line-262"> public void setDataBlockIndexReader(HFileBlockIndex.CellBasedKeyBlockIndexReader reader) {</span> |
| <span class="source-line-no">263</span><span id="line-263"> this.dataBlockIndexReader = reader;</span> |
| <span class="source-line-no">264</span><span id="line-264"> }</span> |
| <span class="source-line-no">265</span><span id="line-265"></span> |
| <span class="source-line-no">266</span><span id="line-266"> @Override</span> |
| <span class="source-line-no">267</span><span id="line-267"> public HFileBlockIndex.CellBasedKeyBlockIndexReader getDataBlockIndexReader() {</span> |
| <span class="source-line-no">268</span><span id="line-268"> return dataBlockIndexReader;</span> |
| <span class="source-line-no">269</span><span id="line-269"> }</span> |
| <span class="source-line-no">270</span><span id="line-270"></span> |
| <span class="source-line-no">271</span><span id="line-271"> @Override</span> |
| <span class="source-line-no">272</span><span id="line-272"> public void setMetaBlockIndexReader(HFileBlockIndex.ByteArrayKeyBlockIndexReader reader) {</span> |
| <span class="source-line-no">273</span><span id="line-273"> this.metaBlockIndexReader = reader;</span> |
| <span class="source-line-no">274</span><span id="line-274"> }</span> |
| <span class="source-line-no">275</span><span id="line-275"></span> |
| <span class="source-line-no">276</span><span id="line-276"> @Override</span> |
| <span class="source-line-no">277</span><span id="line-277"> public HFileBlockIndex.ByteArrayKeyBlockIndexReader getMetaBlockIndexReader() {</span> |
| <span class="source-line-no">278</span><span id="line-278"> return metaBlockIndexReader;</span> |
| <span class="source-line-no">279</span><span id="line-279"> }</span> |
| <span class="source-line-no">280</span><span id="line-280"></span> |
| <span class="source-line-no">281</span><span id="line-281"> @Override</span> |
| <span class="source-line-no">282</span><span id="line-282"> public FixedFileTrailer getTrailer() {</span> |
| <span class="source-line-no">283</span><span id="line-283"> return trailer;</span> |
| <span class="source-line-no">284</span><span id="line-284"> }</span> |
| <span class="source-line-no">285</span><span id="line-285"></span> |
| <span class="source-line-no">286</span><span id="line-286"> @Override</span> |
| <span class="source-line-no">287</span><span id="line-287"> public ReaderContext getContext() {</span> |
| <span class="source-line-no">288</span><span id="line-288"> return this.context;</span> |
| <span class="source-line-no">289</span><span id="line-289"> }</span> |
| <span class="source-line-no">290</span><span id="line-290"></span> |
| <span class="source-line-no">291</span><span id="line-291"> @Override</span> |
| <span class="source-line-no">292</span><span id="line-292"> public HFileInfo getHFileInfo() {</span> |
| <span class="source-line-no">293</span><span id="line-293"> return this.fileInfo;</span> |
| <span class="source-line-no">294</span><span id="line-294"> }</span> |
| <span class="source-line-no">295</span><span id="line-295"></span> |
| <span class="source-line-no">296</span><span id="line-296"> @Override</span> |
| <span class="source-line-no">297</span><span id="line-297"> public boolean isPrimaryReplicaReader() {</span> |
| <span class="source-line-no">298</span><span id="line-298"> return primaryReplicaReader;</span> |
| <span class="source-line-no">299</span><span id="line-299"> }</span> |
| <span class="source-line-no">300</span><span id="line-300"></span> |
| <span class="source-line-no">301</span><span id="line-301"> /**</span> |
| <span class="source-line-no">302</span><span id="line-302"> * An exception thrown when an operation requiring a scanner to be seeked is invoked on a scanner</span> |
| <span class="source-line-no">303</span><span id="line-303"> * that is not seeked.</span> |
| <span class="source-line-no">304</span><span id="line-304"> */</span> |
| <span class="source-line-no">305</span><span id="line-305"> @SuppressWarnings("serial")</span> |
| <span class="source-line-no">306</span><span id="line-306"> public static class NotSeekedException extends IllegalStateException {</span> |
| <span class="source-line-no">307</span><span id="line-307"> public NotSeekedException(Path path) {</span> |
| <span class="source-line-no">308</span><span id="line-308"> super(path + " not seeked to a key/value");</span> |
| <span class="source-line-no">309</span><span id="line-309"> }</span> |
| <span class="source-line-no">310</span><span id="line-310"> }</span> |
| <span class="source-line-no">311</span><span id="line-311"></span> |
| <span class="source-line-no">312</span><span id="line-312"> public static class HFileScannerImpl implements HFileScanner {</span> |
| <span class="source-line-no">313</span><span id="line-313"> private ByteBuff blockBuffer;</span> |
| <span class="source-line-no">314</span><span id="line-314"> protected final boolean cacheBlocks;</span> |
| <span class="source-line-no">315</span><span id="line-315"> protected final boolean pread;</span> |
| <span class="source-line-no">316</span><span id="line-316"> protected final boolean isCompaction;</span> |
| <span class="source-line-no">317</span><span id="line-317"> private int currKeyLen;</span> |
| <span class="source-line-no">318</span><span id="line-318"> private int currValueLen;</span> |
| <span class="source-line-no">319</span><span id="line-319"> private int currMemstoreTSLen;</span> |
| <span class="source-line-no">320</span><span id="line-320"> private long currMemstoreTS;</span> |
| <span class="source-line-no">321</span><span id="line-321"> protected final HFile.Reader reader;</span> |
| <span class="source-line-no">322</span><span id="line-322"> private int currTagsLen;</span> |
| <span class="source-line-no">323</span><span id="line-323"> private short rowLen;</span> |
| <span class="source-line-no">324</span><span id="line-324"> // buffer backed keyonlyKV</span> |
| <span class="source-line-no">325</span><span id="line-325"> private ByteBufferKeyOnlyKeyValue bufBackedKeyOnlyKv = new ByteBufferKeyOnlyKeyValue();</span> |
| <span class="source-line-no">326</span><span id="line-326"> // A pair for reusing in blockSeek() so that we don't garbage lot of objects</span> |
| <span class="source-line-no">327</span><span id="line-327"> final ObjectIntPair<ByteBuffer> pair = new ObjectIntPair<>();</span> |
| <span class="source-line-no">328</span><span id="line-328"></span> |
| <span class="source-line-no">329</span><span id="line-329"> /**</span> |
| <span class="source-line-no">330</span><span id="line-330"> * 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">331</span><span id="line-331"> * nextIndexedKey is HConstants.NO_NEXT_INDEXED_KEY, it means that the current data block is the</span> |
| <span class="source-line-no">332</span><span id="line-332"> * last data block. If the nextIndexedKey is null, it means the nextIndexedKey has not been</span> |
| <span class="source-line-no">333</span><span id="line-333"> * loaded yet.</span> |
| <span class="source-line-no">334</span><span id="line-334"> */</span> |
| <span class="source-line-no">335</span><span id="line-335"> protected ExtendedCell nextIndexedKey;</span> |
| <span class="source-line-no">336</span><span id="line-336"></span> |
| <span class="source-line-no">337</span><span id="line-337"> // Current block being used. NOTICE: DON't release curBlock separately except in shipped() or</span> |
| <span class="source-line-no">338</span><span id="line-338"> // close() methods. Because the shipped() or close() will do the release finally, even if any</span> |
| <span class="source-line-no">339</span><span id="line-339"> // exception occur the curBlock will be released by the close() method (see</span> |
| <span class="source-line-no">340</span><span id="line-340"> // RegionScannerImpl#handleException). Call the releaseIfNotCurBlock() to release the</span> |
| <span class="source-line-no">341</span><span id="line-341"> // unreferenced block please.</span> |
| <span class="source-line-no">342</span><span id="line-342"> protected HFileBlock curBlock;</span> |
| <span class="source-line-no">343</span><span id="line-343"> // Whether we returned a result for curBlock's size in recordBlockSize().</span> |
| <span class="source-line-no">344</span><span id="line-344"> // gets reset whenever curBlock is changed.</span> |
| <span class="source-line-no">345</span><span id="line-345"> private boolean providedCurrentBlockSize = false;</span> |
| <span class="source-line-no">346</span><span id="line-346"></span> |
| <span class="source-line-no">347</span><span id="line-347"> public HFileBlock getCurBlock() {</span> |
| <span class="source-line-no">348</span><span id="line-348"> return curBlock;</span> |
| <span class="source-line-no">349</span><span id="line-349"> }</span> |
| <span class="source-line-no">350</span><span id="line-350"></span> |
| <span class="source-line-no">351</span><span id="line-351"> // Previous blocks that were used in the course of the read</span> |
| <span class="source-line-no">352</span><span id="line-352"> protected final ArrayList<HFileBlock> prevBlocks = new ArrayList<>();</span> |
| <span class="source-line-no">353</span><span id="line-353"></span> |
| <span class="source-line-no">354</span><span id="line-354"> public HFileScannerImpl(final HFile.Reader reader, final boolean cacheBlocks,</span> |
| <span class="source-line-no">355</span><span id="line-355"> final boolean pread, final boolean isCompaction) {</span> |
| <span class="source-line-no">356</span><span id="line-356"> this.reader = reader;</span> |
| <span class="source-line-no">357</span><span id="line-357"> this.cacheBlocks = cacheBlocks;</span> |
| <span class="source-line-no">358</span><span id="line-358"> this.pread = pread;</span> |
| <span class="source-line-no">359</span><span id="line-359"> this.isCompaction = isCompaction;</span> |
| <span class="source-line-no">360</span><span id="line-360"> }</span> |
| <span class="source-line-no">361</span><span id="line-361"></span> |
| <span class="source-line-no">362</span><span id="line-362"> void updateCurrBlockRef(HFileBlock block) {</span> |
| <span class="source-line-no">363</span><span id="line-363"> if (block != null && curBlock != null && block.getOffset() == curBlock.getOffset()) {</span> |
| <span class="source-line-no">364</span><span id="line-364"> return;</span> |
| <span class="source-line-no">365</span><span id="line-365"> }</span> |
| <span class="source-line-no">366</span><span id="line-366"> if (this.curBlock != null && this.curBlock.isSharedMem()) {</span> |
| <span class="source-line-no">367</span><span id="line-367"> prevBlocks.add(this.curBlock);</span> |
| <span class="source-line-no">368</span><span id="line-368"> }</span> |
| <span class="source-line-no">369</span><span id="line-369"> this.curBlock = block;</span> |
| <span class="source-line-no">370</span><span id="line-370"> this.providedCurrentBlockSize = false;</span> |
| <span class="source-line-no">371</span><span id="line-371"> }</span> |
| <span class="source-line-no">372</span><span id="line-372"></span> |
| <span class="source-line-no">373</span><span id="line-373"> void reset() {</span> |
| <span class="source-line-no">374</span><span id="line-374"> // We don't have to keep ref to heap block</span> |
| <span class="source-line-no">375</span><span id="line-375"> if (this.curBlock != null && this.curBlock.isSharedMem()) {</span> |
| <span class="source-line-no">376</span><span id="line-376"> this.prevBlocks.add(this.curBlock);</span> |
| <span class="source-line-no">377</span><span id="line-377"> }</span> |
| <span class="source-line-no">378</span><span id="line-378"> this.curBlock = null;</span> |
| <span class="source-line-no">379</span><span id="line-379"> }</span> |
| <span class="source-line-no">380</span><span id="line-380"></span> |
| <span class="source-line-no">381</span><span id="line-381"> private void returnBlocks(boolean returnAll) {</span> |
| <span class="source-line-no">382</span><span id="line-382"> this.prevBlocks.forEach(HFileBlock::release);</span> |
| <span class="source-line-no">383</span><span id="line-383"> this.prevBlocks.clear();</span> |
| <span class="source-line-no">384</span><span id="line-384"> if (returnAll && this.curBlock != null) {</span> |
| <span class="source-line-no">385</span><span id="line-385"> this.curBlock.release();</span> |
| <span class="source-line-no">386</span><span id="line-386"> this.curBlock = null;</span> |
| <span class="source-line-no">387</span><span id="line-387"> }</span> |
| <span class="source-line-no">388</span><span id="line-388"> }</span> |
| <span class="source-line-no">389</span><span id="line-389"></span> |
| <span class="source-line-no">390</span><span id="line-390"> @Override</span> |
| <span class="source-line-no">391</span><span id="line-391"> public boolean isSeeked() {</span> |
| <span class="source-line-no">392</span><span id="line-392"> return blockBuffer != null;</span> |
| <span class="source-line-no">393</span><span id="line-393"> }</span> |
| <span class="source-line-no">394</span><span id="line-394"></span> |
| <span class="source-line-no">395</span><span id="line-395"> @Override</span> |
| <span class="source-line-no">396</span><span id="line-396"> public String toString() {</span> |
| <span class="source-line-no">397</span><span id="line-397"> return "HFileScanner for reader " + String.valueOf(getReader());</span> |
| <span class="source-line-no">398</span><span id="line-398"> }</span> |
| <span class="source-line-no">399</span><span id="line-399"></span> |
| <span class="source-line-no">400</span><span id="line-400"> protected void assertSeeked() {</span> |
| <span class="source-line-no">401</span><span id="line-401"> if (!isSeeked()) {</span> |
| <span class="source-line-no">402</span><span id="line-402"> throw new NotSeekedException(reader.getPath());</span> |
| <span class="source-line-no">403</span><span id="line-403"> }</span> |
| <span class="source-line-no">404</span><span id="line-404"> }</span> |
| <span class="source-line-no">405</span><span id="line-405"></span> |
| <span class="source-line-no">406</span><span id="line-406"> @Override</span> |
| <span class="source-line-no">407</span><span id="line-407"> public HFile.Reader getReader() {</span> |
| <span class="source-line-no">408</span><span id="line-408"> return reader;</span> |
| <span class="source-line-no">409</span><span id="line-409"> }</span> |
| <span class="source-line-no">410</span><span id="line-410"></span> |
| <span class="source-line-no">411</span><span id="line-411"> // From non encoded HFiles, we always read back KeyValue or its descendant.(Note: When HFile</span> |
| <span class="source-line-no">412</span><span id="line-412"> // block is in DBB, it will be OffheapKV). So all parts of the Cell is in a contiguous</span> |
| <span class="source-line-no">413</span><span id="line-413"> // array/buffer. How many bytes we should wrap to make the KV is what this method returns.</span> |
| <span class="source-line-no">414</span><span id="line-414"> private int getKVBufSize() {</span> |
| <span class="source-line-no">415</span><span id="line-415"> int kvBufSize = KEY_VALUE_LEN_SIZE + currKeyLen + currValueLen;</span> |
| <span class="source-line-no">416</span><span id="line-416"> if (currTagsLen > 0) {</span> |
| <span class="source-line-no">417</span><span id="line-417"> kvBufSize += Bytes.SIZEOF_SHORT + currTagsLen;</span> |
| <span class="source-line-no">418</span><span id="line-418"> }</span> |
| <span class="source-line-no">419</span><span id="line-419"> return kvBufSize;</span> |
| <span class="source-line-no">420</span><span id="line-420"> }</span> |
| <span class="source-line-no">421</span><span id="line-421"></span> |
| <span class="source-line-no">422</span><span id="line-422"> @Override</span> |
| <span class="source-line-no">423</span><span id="line-423"> public void close() {</span> |
| <span class="source-line-no">424</span><span id="line-424"> if (!pread) {</span> |
| <span class="source-line-no">425</span><span id="line-425"> // For seek + pread stream socket should be closed when the scanner is closed. HBASE-9393</span> |
| <span class="source-line-no">426</span><span id="line-426"> reader.unbufferStream();</span> |
| <span class="source-line-no">427</span><span id="line-427"> }</span> |
| <span class="source-line-no">428</span><span id="line-428"> this.returnBlocks(true);</span> |
| <span class="source-line-no">429</span><span id="line-429"> }</span> |
| <span class="source-line-no">430</span><span id="line-430"></span> |
| <span class="source-line-no">431</span><span id="line-431"> @Override</span> |
| <span class="source-line-no">432</span><span id="line-432"> public void recordBlockSize(IntConsumer blockSizeConsumer) {</span> |
| <span class="source-line-no">433</span><span id="line-433"> if (!providedCurrentBlockSize && curBlock != null) {</span> |
| <span class="source-line-no">434</span><span id="line-434"> providedCurrentBlockSize = true;</span> |
| <span class="source-line-no">435</span><span id="line-435"> blockSizeConsumer.accept(curBlock.getUncompressedSizeWithoutHeader());</span> |
| <span class="source-line-no">436</span><span id="line-436"> }</span> |
| <span class="source-line-no">437</span><span id="line-437"> }</span> |
| <span class="source-line-no">438</span><span id="line-438"></span> |
| <span class="source-line-no">439</span><span id="line-439"> // Returns the #bytes in HFile for the current cell. Used to skip these many bytes in current</span> |
| <span class="source-line-no">440</span><span id="line-440"> // HFile block's buffer so as to position to the next cell.</span> |
| <span class="source-line-no">441</span><span id="line-441"> private int getCurCellSerializedSize() {</span> |
| <span class="source-line-no">442</span><span id="line-442"> int curCellSize = KEY_VALUE_LEN_SIZE + currKeyLen + currValueLen + currMemstoreTSLen;</span> |
| <span class="source-line-no">443</span><span id="line-443"> if (this.reader.getFileContext().isIncludesTags()) {</span> |
| <span class="source-line-no">444</span><span id="line-444"> curCellSize += Bytes.SIZEOF_SHORT + currTagsLen;</span> |
| <span class="source-line-no">445</span><span id="line-445"> }</span> |
| <span class="source-line-no">446</span><span id="line-446"> return curCellSize;</span> |
| <span class="source-line-no">447</span><span id="line-447"> }</span> |
| <span class="source-line-no">448</span><span id="line-448"></span> |
| <span class="source-line-no">449</span><span id="line-449"> protected void readKeyValueLen() {</span> |
| <span class="source-line-no">450</span><span id="line-450"> // 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">451</span><span id="line-451"> // inlined and is not too big to compile. We also manage position in ByteBuffer ourselves</span> |
| <span class="source-line-no">452</span><span id="line-452"> // because it is faster than going via range-checked ByteBuffer methods or going through a</span> |
| <span class="source-line-no">453</span><span id="line-453"> // byte buffer array a byte at a time.</span> |
| <span class="source-line-no">454</span><span id="line-454"> // Get a long at a time rather than read two individual ints. In micro-benchmarking, even</span> |
| <span class="source-line-no">455</span><span id="line-455"> // with the extra bit-fiddling, this is order-of-magnitude faster than getting two ints.</span> |
| <span class="source-line-no">456</span><span id="line-456"> // Trying to imitate what was done - need to profile if this is better or</span> |
| <span class="source-line-no">457</span><span id="line-457"> // earlier way is better by doing mark and reset?</span> |
| <span class="source-line-no">458</span><span id="line-458"> // But ensure that you read long instead of two ints</span> |
| <span class="source-line-no">459</span><span id="line-459"> long ll = blockBuffer.getLongAfterPosition(0);</span> |
| <span class="source-line-no">460</span><span id="line-460"> // Read top half as an int of key length and bottom int as value length</span> |
| <span class="source-line-no">461</span><span id="line-461"> this.currKeyLen = (int) (ll >> Integer.SIZE);</span> |
| <span class="source-line-no">462</span><span id="line-462"> this.currValueLen = (int) (Bytes.MASK_FOR_LOWER_INT_IN_LONG ^ ll);</span> |
| <span class="source-line-no">463</span><span id="line-463"> checkKeyValueLen();</span> |
| <span class="source-line-no">464</span><span id="line-464"> this.rowLen = blockBuffer.getShortAfterPosition(Bytes.SIZEOF_LONG);</span> |
| <span class="source-line-no">465</span><span id="line-465"> // Move position past the key and value lengths and then beyond the key and value</span> |
| <span class="source-line-no">466</span><span id="line-466"> int p = (Bytes.SIZEOF_LONG + currKeyLen + currValueLen);</span> |
| <span class="source-line-no">467</span><span id="line-467"> if (reader.getFileContext().isIncludesTags()) {</span> |
| <span class="source-line-no">468</span><span id="line-468"> // Tags length is a short.</span> |
| <span class="source-line-no">469</span><span id="line-469"> this.currTagsLen = blockBuffer.getShortAfterPosition(p);</span> |
| <span class="source-line-no">470</span><span id="line-470"> checkTagsLen();</span> |
| <span class="source-line-no">471</span><span id="line-471"> p += (Bytes.SIZEOF_SHORT + currTagsLen);</span> |
| <span class="source-line-no">472</span><span id="line-472"> }</span> |
| <span class="source-line-no">473</span><span id="line-473"> readMvccVersion(p);</span> |
| <span class="source-line-no">474</span><span id="line-474"> }</span> |
| <span class="source-line-no">475</span><span id="line-475"></span> |
| <span class="source-line-no">476</span><span id="line-476"> private final void checkTagsLen() {</span> |
| <span class="source-line-no">477</span><span id="line-477"> if (checkLen(this.currTagsLen)) {</span> |
| <span class="source-line-no">478</span><span id="line-478"> throw new IllegalStateException(</span> |
| <span class="source-line-no">479</span><span id="line-479"> "Invalid currTagsLen " + this.currTagsLen + ". Block offset: " + curBlock.getOffset()</span> |
| <span class="source-line-no">480</span><span id="line-480"> + ", block length: " + this.blockBuffer.limit() + ", position: "</span> |
| <span class="source-line-no">481</span><span id="line-481"> + this.blockBuffer.position() + " (without header)." + " path=" + reader.getPath());</span> |
| <span class="source-line-no">482</span><span id="line-482"> }</span> |
| <span class="source-line-no">483</span><span id="line-483"> }</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"> * Read mvcc. Does checks to see if we even need to read the mvcc at all.</span> |
| <span class="source-line-no">487</span><span id="line-487"> */</span> |
| <span class="source-line-no">488</span><span id="line-488"> protected void readMvccVersion(final int offsetFromPos) {</span> |
| <span class="source-line-no">489</span><span id="line-489"> // See if we even need to decode mvcc.</span> |
| <span class="source-line-no">490</span><span id="line-490"> if (!this.reader.getHFileInfo().shouldIncludeMemStoreTS()) {</span> |
| <span class="source-line-no">491</span><span id="line-491"> return;</span> |
| <span class="source-line-no">492</span><span id="line-492"> }</span> |
| <span class="source-line-no">493</span><span id="line-493"> if (!this.reader.getHFileInfo().isDecodeMemstoreTS()) {</span> |
| <span class="source-line-no">494</span><span id="line-494"> currMemstoreTS = 0;</span> |
| <span class="source-line-no">495</span><span id="line-495"> currMemstoreTSLen = 1;</span> |
| <span class="source-line-no">496</span><span id="line-496"> return;</span> |
| <span class="source-line-no">497</span><span id="line-497"> }</span> |
| <span class="source-line-no">498</span><span id="line-498"> _readMvccVersion(offsetFromPos);</span> |
| <span class="source-line-no">499</span><span id="line-499"> }</span> |
| <span class="source-line-no">500</span><span id="line-500"></span> |
| <span class="source-line-no">501</span><span id="line-501"> /**</span> |
| <span class="source-line-no">502</span><span id="line-502"> * Actually do the mvcc read. Does no checks.</span> |
| <span class="source-line-no">503</span><span id="line-503"> */</span> |
| <span class="source-line-no">504</span><span id="line-504"> private void _readMvccVersion(int offsetFromPos) {</span> |
| <span class="source-line-no">505</span><span id="line-505"> // This is Bytes#bytesToVint inlined so can save a few instructions in this hot method; i.e.</span> |
| <span class="source-line-no">506</span><span id="line-506"> // previous if one-byte vint, we'd redo the vint call to find int size.</span> |
| <span class="source-line-no">507</span><span id="line-507"> // Also the method is kept small so can be inlined.</span> |
| <span class="source-line-no">508</span><span id="line-508"> byte firstByte = blockBuffer.getByteAfterPosition(offsetFromPos);</span> |
| <span class="source-line-no">509</span><span id="line-509"> int len = WritableUtils.decodeVIntSize(firstByte);</span> |
| <span class="source-line-no">510</span><span id="line-510"> if (len == 1) {</span> |
| <span class="source-line-no">511</span><span id="line-511"> this.currMemstoreTS = firstByte;</span> |
| <span class="source-line-no">512</span><span id="line-512"> } else {</span> |
| <span class="source-line-no">513</span><span id="line-513"> int remaining = len - 1;</span> |
| <span class="source-line-no">514</span><span id="line-514"> long i = 0;</span> |
| <span class="source-line-no">515</span><span id="line-515"> offsetFromPos++;</span> |
| <span class="source-line-no">516</span><span id="line-516"> if (remaining >= Bytes.SIZEOF_INT) {</span> |
| <span class="source-line-no">517</span><span id="line-517"> // The int read has to be converted to unsigned long so the & op</span> |
| <span class="source-line-no">518</span><span id="line-518"> i = (blockBuffer.getIntAfterPosition(offsetFromPos) & 0x00000000ffffffffL);</span> |
| <span class="source-line-no">519</span><span id="line-519"> remaining -= Bytes.SIZEOF_INT;</span> |
| <span class="source-line-no">520</span><span id="line-520"> offsetFromPos += Bytes.SIZEOF_INT;</span> |
| <span class="source-line-no">521</span><span id="line-521"> }</span> |
| <span class="source-line-no">522</span><span id="line-522"> if (remaining >= Bytes.SIZEOF_SHORT) {</span> |
| <span class="source-line-no">523</span><span id="line-523"> short s = blockBuffer.getShortAfterPosition(offsetFromPos);</span> |
| <span class="source-line-no">524</span><span id="line-524"> i = i << 16;</span> |
| <span class="source-line-no">525</span><span id="line-525"> i = i | (s & 0xFFFF);</span> |
| <span class="source-line-no">526</span><span id="line-526"> remaining -= Bytes.SIZEOF_SHORT;</span> |
| <span class="source-line-no">527</span><span id="line-527"> offsetFromPos += Bytes.SIZEOF_SHORT;</span> |
| <span class="source-line-no">528</span><span id="line-528"> }</span> |
| <span class="source-line-no">529</span><span id="line-529"> for (int idx = 0; idx < remaining; idx++) {</span> |
| <span class="source-line-no">530</span><span id="line-530"> byte b = blockBuffer.getByteAfterPosition(offsetFromPos + idx);</span> |
| <span class="source-line-no">531</span><span id="line-531"> i = i << 8;</span> |
| <span class="source-line-no">532</span><span id="line-532"> i = i | (b & 0xFF);</span> |
| <span class="source-line-no">533</span><span id="line-533"> }</span> |
| <span class="source-line-no">534</span><span id="line-534"> currMemstoreTS = (WritableUtils.isNegativeVInt(firstByte) ? ~i : i);</span> |
| <span class="source-line-no">535</span><span id="line-535"> }</span> |
| <span class="source-line-no">536</span><span id="line-536"> this.currMemstoreTSLen = len;</span> |
| <span class="source-line-no">537</span><span id="line-537"> }</span> |
| <span class="source-line-no">538</span><span id="line-538"></span> |
| <span class="source-line-no">539</span><span id="line-539"> /**</span> |
| <span class="source-line-no">540</span><span id="line-540"> * Within a loaded block, seek looking for the last key that is smaller than (or equal to?) the</span> |
| <span class="source-line-no">541</span><span id="line-541"> * key we are interested in. A note on the seekBefore: if you have seekBefore = true, AND the</span> |
| <span class="source-line-no">542</span><span id="line-542"> * first key in the block = key, then you'll get thrown exceptions. The caller has to check for</span> |
| <span class="source-line-no">543</span><span id="line-543"> * that case and load the previous block as appropriate. the key to find find the key before the</span> |
| <span class="source-line-no">544</span><span id="line-544"> * given key in case of exact match.</span> |
| <span class="source-line-no">545</span><span id="line-545"> * @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">546</span><span id="line-546"> * inexact match and furthermore, the input key less than the first key of current</span> |
| <span class="source-line-no">547</span><span id="line-547"> * block(e.g. using a faked index key)</span> |
| <span class="source-line-no">548</span><span id="line-548"> */</span> |
| <span class="source-line-no">549</span><span id="line-549"> protected int blockSeek(Cell key, boolean seekBefore) {</span> |
| <span class="source-line-no">550</span><span id="line-550"> int klen, vlen, tlen = 0;</span> |
| <span class="source-line-no">551</span><span id="line-551"> int lastKeyValueSize = -1;</span> |
| <span class="source-line-no">552</span><span id="line-552"> int offsetFromPos;</span> |
| <span class="source-line-no">553</span><span id="line-553"> do {</span> |
| <span class="source-line-no">554</span><span id="line-554"> offsetFromPos = 0;</span> |
| <span class="source-line-no">555</span><span id="line-555"> // Better to ensure that we use the BB Utils here</span> |
| <span class="source-line-no">556</span><span id="line-556"> long ll = blockBuffer.getLongAfterPosition(offsetFromPos);</span> |
| <span class="source-line-no">557</span><span id="line-557"> klen = (int) (ll >> Integer.SIZE);</span> |
| <span class="source-line-no">558</span><span id="line-558"> vlen = (int) (Bytes.MASK_FOR_LOWER_INT_IN_LONG ^ ll);</span> |
| <span class="source-line-no">559</span><span id="line-559"> if (checkKeyLen(klen) || checkLen(vlen)) {</span> |
| <span class="source-line-no">560</span><span id="line-560"> throw new IllegalStateException(</span> |
| <span class="source-line-no">561</span><span id="line-561"> "Invalid klen " + klen + " or vlen " + vlen + ". Block offset: " + curBlock.getOffset()</span> |
| <span class="source-line-no">562</span><span id="line-562"> + ", block length: " + blockBuffer.limit() + ", position: " + blockBuffer.position()</span> |
| <span class="source-line-no">563</span><span id="line-563"> + " (without header)." + " path=" + reader.getPath());</span> |
| <span class="source-line-no">564</span><span id="line-564"> }</span> |
| <span class="source-line-no">565</span><span id="line-565"> offsetFromPos += Bytes.SIZEOF_LONG;</span> |
| <span class="source-line-no">566</span><span id="line-566"> this.rowLen = blockBuffer.getShortAfterPosition(offsetFromPos);</span> |
| <span class="source-line-no">567</span><span id="line-567"> blockBuffer.asSubByteBuffer(blockBuffer.position() + offsetFromPos, klen, pair);</span> |
| <span class="source-line-no">568</span><span id="line-568"> bufBackedKeyOnlyKv.setKey(pair.getFirst(), pair.getSecond(), klen, rowLen);</span> |
| <span class="source-line-no">569</span><span id="line-569"> int comp =</span> |
| <span class="source-line-no">570</span><span id="line-570"> PrivateCellUtil.compareKeyIgnoresMvcc(reader.getComparator(), key, bufBackedKeyOnlyKv);</span> |
| <span class="source-line-no">571</span><span id="line-571"> offsetFromPos += klen + vlen;</span> |
| <span class="source-line-no">572</span><span id="line-572"> if (this.reader.getFileContext().isIncludesTags()) {</span> |
| <span class="source-line-no">573</span><span id="line-573"> // Read short as unsigned, high byte first</span> |
| <span class="source-line-no">574</span><span id="line-574"> tlen = ((blockBuffer.getByteAfterPosition(offsetFromPos) & 0xff) << 8)</span> |
| <span class="source-line-no">575</span><span id="line-575"> ^ (blockBuffer.getByteAfterPosition(offsetFromPos + 1) & 0xff);</span> |
| <span class="source-line-no">576</span><span id="line-576"> if (checkLen(tlen)) {</span> |
| <span class="source-line-no">577</span><span id="line-577"> throw new IllegalStateException("Invalid tlen " + tlen + ". Block offset: "</span> |
| <span class="source-line-no">578</span><span id="line-578"> + curBlock.getOffset() + ", block length: " + blockBuffer.limit() + ", position: "</span> |
| <span class="source-line-no">579</span><span id="line-579"> + blockBuffer.position() + " (without header)." + " path=" + reader.getPath());</span> |
| <span class="source-line-no">580</span><span id="line-580"> }</span> |
| <span class="source-line-no">581</span><span id="line-581"> // add the two bytes read for the tags.</span> |
| <span class="source-line-no">582</span><span id="line-582"> offsetFromPos += tlen + (Bytes.SIZEOF_SHORT);</span> |
| <span class="source-line-no">583</span><span id="line-583"> }</span> |
| <span class="source-line-no">584</span><span id="line-584"> if (this.reader.getHFileInfo().shouldIncludeMemStoreTS()) {</span> |
| <span class="source-line-no">585</span><span id="line-585"> // Directly read the mvcc based on current position</span> |
| <span class="source-line-no">586</span><span id="line-586"> readMvccVersion(offsetFromPos);</span> |
| <span class="source-line-no">587</span><span id="line-587"> }</span> |
| <span class="source-line-no">588</span><span id="line-588"> if (comp == 0) {</span> |
| <span class="source-line-no">589</span><span id="line-589"> if (seekBefore) {</span> |
| <span class="source-line-no">590</span><span id="line-590"> if (lastKeyValueSize < 0) {</span> |
| <span class="source-line-no">591</span><span id="line-591"> throw new IllegalStateException("blockSeek with seekBefore "</span> |
| <span class="source-line-no">592</span><span id="line-592"> + "at the first key of the block: key=" + CellUtil.getCellKeyAsString(key)</span> |
| <span class="source-line-no">593</span><span id="line-593"> + ", blockOffset=" + curBlock.getOffset() + ", onDiskSize="</span> |
| <span class="source-line-no">594</span><span id="line-594"> + curBlock.getOnDiskSizeWithHeader() + ", path=" + reader.getPath());</span> |
| <span class="source-line-no">595</span><span id="line-595"> }</span> |
| <span class="source-line-no">596</span><span id="line-596"> blockBuffer.moveBack(lastKeyValueSize);</span> |
| <span class="source-line-no">597</span><span id="line-597"> readKeyValueLen();</span> |
| <span class="source-line-no">598</span><span id="line-598"> return 1; // non exact match.</span> |
| <span class="source-line-no">599</span><span id="line-599"> }</span> |
| <span class="source-line-no">600</span><span id="line-600"> currKeyLen = klen;</span> |
| <span class="source-line-no">601</span><span id="line-601"> currValueLen = vlen;</span> |
| <span class="source-line-no">602</span><span id="line-602"> currTagsLen = tlen;</span> |
| <span class="source-line-no">603</span><span id="line-603"> return 0; // indicate exact match</span> |
| <span class="source-line-no">604</span><span id="line-604"> } else if (comp < 0) {</span> |
| <span class="source-line-no">605</span><span id="line-605"> if (lastKeyValueSize > 0) {</span> |
| <span class="source-line-no">606</span><span id="line-606"> blockBuffer.moveBack(lastKeyValueSize);</span> |
| <span class="source-line-no">607</span><span id="line-607"> }</span> |
| <span class="source-line-no">608</span><span id="line-608"> readKeyValueLen();</span> |
| <span class="source-line-no">609</span><span id="line-609"> if (lastKeyValueSize == -1 && blockBuffer.position() == 0) {</span> |
| <span class="source-line-no">610</span><span id="line-610"> return HConstants.INDEX_KEY_MAGIC;</span> |
| <span class="source-line-no">611</span><span id="line-611"> }</span> |
| <span class="source-line-no">612</span><span id="line-612"> return 1;</span> |
| <span class="source-line-no">613</span><span id="line-613"> }</span> |
| <span class="source-line-no">614</span><span id="line-614"> // The size of this key/value tuple, including key/value length fields.</span> |
| <span class="source-line-no">615</span><span id="line-615"> lastKeyValueSize = klen + vlen + currMemstoreTSLen + KEY_VALUE_LEN_SIZE;</span> |
| <span class="source-line-no">616</span><span id="line-616"> // include tag length also if tags included with KV</span> |
| <span class="source-line-no">617</span><span id="line-617"> if (reader.getFileContext().isIncludesTags()) {</span> |
| <span class="source-line-no">618</span><span id="line-618"> lastKeyValueSize += tlen + Bytes.SIZEOF_SHORT;</span> |
| <span class="source-line-no">619</span><span id="line-619"> }</span> |
| <span class="source-line-no">620</span><span id="line-620"> blockBuffer.skip(lastKeyValueSize);</span> |
| <span class="source-line-no">621</span><span id="line-621"> } while (blockBuffer.hasRemaining());</span> |
| <span class="source-line-no">622</span><span id="line-622"></span> |
| <span class="source-line-no">623</span><span id="line-623"> // Seek to the last key we successfully read. This will happen if this is</span> |
| <span class="source-line-no">624</span><span id="line-624"> // the last key/value pair in the file, in which case the following call</span> |
| <span class="source-line-no">625</span><span id="line-625"> // to next() has to return false.</span> |
| <span class="source-line-no">626</span><span id="line-626"> blockBuffer.moveBack(lastKeyValueSize);</span> |
| <span class="source-line-no">627</span><span id="line-627"> readKeyValueLen();</span> |
| <span class="source-line-no">628</span><span id="line-628"> return 1; // didn't exactly find it.</span> |
| <span class="source-line-no">629</span><span id="line-629"> }</span> |
| <span class="source-line-no">630</span><span id="line-630"></span> |
| <span class="source-line-no">631</span><span id="line-631"> @Override</span> |
| <span class="source-line-no">632</span><span id="line-632"> public ExtendedCell getNextIndexedKey() {</span> |
| <span class="source-line-no">633</span><span id="line-633"> return nextIndexedKey;</span> |
| <span class="source-line-no">634</span><span id="line-634"> }</span> |
| <span class="source-line-no">635</span><span id="line-635"></span> |
| <span class="source-line-no">636</span><span id="line-636"> @Override</span> |
| <span class="source-line-no">637</span><span id="line-637"> public int seekTo(ExtendedCell key) throws IOException {</span> |
| <span class="source-line-no">638</span><span id="line-638"> return seekTo(key, true);</span> |
| <span class="source-line-no">639</span><span id="line-639"> }</span> |
| <span class="source-line-no">640</span><span id="line-640"></span> |
| <span class="source-line-no">641</span><span id="line-641"> @Override</span> |
| <span class="source-line-no">642</span><span id="line-642"> public int reseekTo(ExtendedCell key) throws IOException {</span> |
| <span class="source-line-no">643</span><span id="line-643"> int compared;</span> |
| <span class="source-line-no">644</span><span id="line-644"> if (isSeeked()) {</span> |
| <span class="source-line-no">645</span><span id="line-645"> compared = compareKey(reader.getComparator(), key);</span> |
| <span class="source-line-no">646</span><span id="line-646"> if (compared < 1) {</span> |
| <span class="source-line-no">647</span><span id="line-647"> // If the required key is less than or equal to current key, then</span> |
| <span class="source-line-no">648</span><span id="line-648"> // don't do anything.</span> |
| <span class="source-line-no">649</span><span id="line-649"> return compared;</span> |
| <span class="source-line-no">650</span><span id="line-650"> } else {</span> |
| <span class="source-line-no">651</span><span id="line-651"> // The comparison with no_next_index_key has to be checked</span> |
| <span class="source-line-no">652</span><span id="line-652"> if (</span> |
| <span class="source-line-no">653</span><span id="line-653"> this.nextIndexedKey != null && (this.nextIndexedKey</span> |
| <span class="source-line-no">654</span><span id="line-654"> == KeyValueScanner.NO_NEXT_INDEXED_KEY</span> |
| <span class="source-line-no">655</span><span id="line-655"> || PrivateCellUtil.compareKeyIgnoresMvcc(reader.getComparator(), key, nextIndexedKey)</span> |
| <span class="source-line-no">656</span><span id="line-656"> < 0)</span> |
| <span class="source-line-no">657</span><span id="line-657"> ) {</span> |
| <span class="source-line-no">658</span><span id="line-658"> // The reader shall continue to scan the current data block instead</span> |
| <span class="source-line-no">659</span><span id="line-659"> // of querying the</span> |
| <span class="source-line-no">660</span><span id="line-660"> // block index as long as it knows the target key is strictly</span> |
| <span class="source-line-no">661</span><span id="line-661"> // smaller than</span> |
| <span class="source-line-no">662</span><span id="line-662"> // the next indexed key or the current data block is the last data</span> |
| <span class="source-line-no">663</span><span id="line-663"> // block.</span> |
| <span class="source-line-no">664</span><span id="line-664"> return loadBlockAndSeekToKey(this.curBlock, nextIndexedKey, false, key, false);</span> |
| <span class="source-line-no">665</span><span id="line-665"> }</span> |
| <span class="source-line-no">666</span><span id="line-666"> }</span> |
| <span class="source-line-no">667</span><span id="line-667"> }</span> |
| <span class="source-line-no">668</span><span id="line-668"> // Don't rewind on a reseek operation, because reseek implies that we are</span> |
| <span class="source-line-no">669</span><span id="line-669"> // always going forward in the file.</span> |
| <span class="source-line-no">670</span><span id="line-670"> return seekTo(key, false);</span> |
| <span class="source-line-no">671</span><span id="line-671"> }</span> |
| <span class="source-line-no">672</span><span id="line-672"></span> |
| <span class="source-line-no">673</span><span id="line-673"> /**</span> |
| <span class="source-line-no">674</span><span id="line-674"> * An internal API function. Seek to the given key, optionally rewinding to the first key of the</span> |
| <span class="source-line-no">675</span><span id="line-675"> * block before doing the seek.</span> |
| <span class="source-line-no">676</span><span id="line-676"> * @param key - a cell representing the key that we need to fetch</span> |
| <span class="source-line-no">677</span><span id="line-677"> * @param rewind whether to rewind to the first key of the block before doing the seek. If this</span> |
| <span class="source-line-no">678</span><span id="line-678"> * is false, we are assuming we never go back, otherwise the result is undefined.</span> |
| <span class="source-line-no">679</span><span id="line-679"> * @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">680</span><span id="line-680"> * 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">681</span><span id="line-681"> * the file while using a faked index key</span> |
| <span class="source-line-no">682</span><span id="line-682"> */</span> |
| <span class="source-line-no">683</span><span id="line-683"> public int seekTo(ExtendedCell key, boolean rewind) throws IOException {</span> |
| <span class="source-line-no">684</span><span id="line-684"> HFileBlockIndex.BlockIndexReader indexReader = reader.getDataBlockIndexReader();</span> |
| <span class="source-line-no">685</span><span id="line-685"> BlockWithScanInfo blockWithScanInfo = indexReader.loadDataBlockWithScanInfo(key, curBlock,</span> |
| <span class="source-line-no">686</span><span id="line-686"> cacheBlocks, pread, isCompaction, getEffectiveDataBlockEncoding(), reader);</span> |
| <span class="source-line-no">687</span><span id="line-687"> if (blockWithScanInfo == null || blockWithScanInfo.getHFileBlock() == null) {</span> |
| <span class="source-line-no">688</span><span id="line-688"> // This happens if the key e.g. falls before the beginning of the file.</span> |
| <span class="source-line-no">689</span><span id="line-689"> return -1;</span> |
| <span class="source-line-no">690</span><span id="line-690"> }</span> |
| <span class="source-line-no">691</span><span id="line-691"> return loadBlockAndSeekToKey(blockWithScanInfo.getHFileBlock(),</span> |
| <span class="source-line-no">692</span><span id="line-692"> blockWithScanInfo.getNextIndexedKey(), rewind, key, false);</span> |
| <span class="source-line-no">693</span><span id="line-693"> }</span> |
| <span class="source-line-no">694</span><span id="line-694"></span> |
| <span class="source-line-no">695</span><span id="line-695"> @Override</span> |
| <span class="source-line-no">696</span><span id="line-696"> public boolean seekBefore(ExtendedCell key) throws IOException {</span> |
| <span class="source-line-no">697</span><span id="line-697"> HFileBlock seekToBlock = reader.getDataBlockIndexReader().seekToDataBlock(key, curBlock,</span> |
| <span class="source-line-no">698</span><span id="line-698"> cacheBlocks, pread, isCompaction, reader.getEffectiveEncodingInCache(isCompaction), reader);</span> |
| <span class="source-line-no">699</span><span id="line-699"> if (seekToBlock == null) {</span> |
| <span class="source-line-no">700</span><span id="line-700"> return false;</span> |
| <span class="source-line-no">701</span><span id="line-701"> }</span> |
| <span class="source-line-no">702</span><span id="line-702"> ExtendedCell firstKey = getFirstKeyCellInBlock(seekToBlock);</span> |
| <span class="source-line-no">703</span><span id="line-703"> if (PrivateCellUtil.compareKeyIgnoresMvcc(reader.getComparator(), firstKey, key) >= 0) {</span> |
| <span class="source-line-no">704</span><span id="line-704"> long previousBlockOffset = seekToBlock.getPrevBlockOffset();</span> |
| <span class="source-line-no">705</span><span id="line-705"> // The key we are interested in</span> |
| <span class="source-line-no">706</span><span id="line-706"> if (previousBlockOffset == -1) {</span> |
| <span class="source-line-no">707</span><span id="line-707"> // we have a 'problem', the key we want is the first of the file.</span> |
| <span class="source-line-no">708</span><span id="line-708"> releaseIfNotCurBlock(seekToBlock);</span> |
| <span class="source-line-no">709</span><span id="line-709"> return false;</span> |
| <span class="source-line-no">710</span><span id="line-710"> }</span> |
| <span class="source-line-no">711</span><span id="line-711"></span> |
| <span class="source-line-no">712</span><span id="line-712"> // The first key in the current block 'seekToBlock' is greater than the given</span> |
| <span class="source-line-no">713</span><span id="line-713"> // seekBefore key. We will go ahead by reading the next block that satisfies the</span> |
| <span class="source-line-no">714</span><span id="line-714"> // given key. Return the current block before reading the next one.</span> |
| <span class="source-line-no">715</span><span id="line-715"> releaseIfNotCurBlock(seekToBlock);</span> |
| <span class="source-line-no">716</span><span id="line-716"> // It is important that we compute and pass onDiskSize to the block</span> |
| <span class="source-line-no">717</span><span id="line-717"> // reader so that it does not have to read the header separately to</span> |
| <span class="source-line-no">718</span><span id="line-718"> // figure out the size. Currently, we do not have a way to do this</span> |
| <span class="source-line-no">719</span><span id="line-719"> // correctly in the general case however.</span> |
| <span class="source-line-no">720</span><span id="line-720"> // TODO: See https://issues.apache.org/jira/browse/HBASE-14576</span> |
| <span class="source-line-no">721</span><span id="line-721"> int prevBlockSize = -1;</span> |
| <span class="source-line-no">722</span><span id="line-722"> seekToBlock = reader.readBlock(previousBlockOffset, prevBlockSize, cacheBlocks, pread,</span> |
| <span class="source-line-no">723</span><span id="line-723"> isCompaction, true, BlockType.DATA, getEffectiveDataBlockEncoding());</span> |
| <span class="source-line-no">724</span><span id="line-724"> // TODO shortcut: seek forward in this block to the last key of the</span> |
| <span class="source-line-no">725</span><span id="line-725"> // block.</span> |
| <span class="source-line-no">726</span><span id="line-726"> }</span> |
| <span class="source-line-no">727</span><span id="line-727"> loadBlockAndSeekToKey(seekToBlock, firstKey, true, key, true);</span> |
| <span class="source-line-no">728</span><span id="line-728"> return true;</span> |
| <span class="source-line-no">729</span><span id="line-729"> }</span> |
| <span class="source-line-no">730</span><span id="line-730"></span> |
| <span class="source-line-no">731</span><span id="line-731"> /**</span> |
| <span class="source-line-no">732</span><span id="line-732"> * The curBlock will be released by shipping or close method, so only need to consider releasing</span> |
| <span class="source-line-no">733</span><span id="line-733"> * the block, which was read from HFile before and not referenced by curBlock.</span> |
| <span class="source-line-no">734</span><span id="line-734"> */</span> |
| <span class="source-line-no">735</span><span id="line-735"> protected void releaseIfNotCurBlock(HFileBlock block) {</span> |
| <span class="source-line-no">736</span><span id="line-736"> if (curBlock != block) {</span> |
| <span class="source-line-no">737</span><span id="line-737"> block.release();</span> |
| <span class="source-line-no">738</span><span id="line-738"> }</span> |
| <span class="source-line-no">739</span><span id="line-739"> }</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"> * Scans blocks in the "scanned" section of the {@link HFile} until the next data block is</span> |
| <span class="source-line-no">743</span><span id="line-743"> * found.</span> |
| <span class="source-line-no">744</span><span id="line-744"> * @return the next block, or null if there are no more data blocks</span> |
| <span class="source-line-no">745</span><span id="line-745"> */</span> |
| <span class="source-line-no">746</span><span id="line-746"> @edu.umd.cs.findbugs.annotations.SuppressWarnings(value = "NP_NULL_ON_SOME_PATH",</span> |
| <span class="source-line-no">747</span><span id="line-747"> justification = "Yeah, unnecessary null check; could do w/ clean up")</span> |
| <span class="source-line-no">748</span><span id="line-748"> protected HFileBlock readNextDataBlock() throws IOException {</span> |
| <span class="source-line-no">749</span><span id="line-749"> long lastDataBlockOffset = reader.getTrailer().getLastDataBlockOffset();</span> |
| <span class="source-line-no">750</span><span id="line-750"> if (curBlock == null) {</span> |
| <span class="source-line-no">751</span><span id="line-751"> return null;</span> |
| <span class="source-line-no">752</span><span id="line-752"> }</span> |
| <span class="source-line-no">753</span><span id="line-753"> HFileBlock block = this.curBlock;</span> |
| <span class="source-line-no">754</span><span id="line-754"> do {</span> |
| <span class="source-line-no">755</span><span id="line-755"> if (block.getOffset() >= lastDataBlockOffset) {</span> |
| <span class="source-line-no">756</span><span id="line-756"> releaseIfNotCurBlock(block);</span> |
| <span class="source-line-no">757</span><span id="line-757"> return null;</span> |
| <span class="source-line-no">758</span><span id="line-758"> }</span> |
| <span class="source-line-no">759</span><span id="line-759"> if (block.getOffset() < 0) {</span> |
| <span class="source-line-no">760</span><span id="line-760"> releaseIfNotCurBlock(block);</span> |
| <span class="source-line-no">761</span><span id="line-761"> throw new IOException("Invalid block offset: " + block + ", path=" + reader.getPath());</span> |
| <span class="source-line-no">762</span><span id="line-762"> }</span> |
| <span class="source-line-no">763</span><span id="line-763"> // We are reading the next block without block type validation, because</span> |
| <span class="source-line-no">764</span><span id="line-764"> // it might turn out to be a non-data block.</span> |
| <span class="source-line-no">765</span><span id="line-765"> block = reader.readBlock(block.getOffset() + block.getOnDiskSizeWithHeader(),</span> |
| <span class="source-line-no">766</span><span id="line-766"> block.getNextBlockOnDiskSize(), cacheBlocks, pread, isCompaction, true, null,</span> |
| <span class="source-line-no">767</span><span id="line-767"> getEffectiveDataBlockEncoding());</span> |
| <span class="source-line-no">768</span><span id="line-768"> if (block != null && !block.getBlockType().isData()) {</span> |
| <span class="source-line-no">769</span><span id="line-769"> // Whatever block we read we will be returning it unless</span> |
| <span class="source-line-no">770</span><span id="line-770"> // it is a datablock. Just in case the blocks are non data blocks</span> |
| <span class="source-line-no">771</span><span id="line-771"> block.release();</span> |
| <span class="source-line-no">772</span><span id="line-772"> }</span> |
| <span class="source-line-no">773</span><span id="line-773"> } while (!block.getBlockType().isData());</span> |
| <span class="source-line-no">774</span><span id="line-774"> return block;</span> |
| <span class="source-line-no">775</span><span id="line-775"> }</span> |
| <span class="source-line-no">776</span><span id="line-776"></span> |
| <span class="source-line-no">777</span><span id="line-777"> public DataBlockEncoding getEffectiveDataBlockEncoding() {</span> |
| <span class="source-line-no">778</span><span id="line-778"> return this.reader.getEffectiveEncodingInCache(isCompaction);</span> |
| <span class="source-line-no">779</span><span id="line-779"> }</span> |
| <span class="source-line-no">780</span><span id="line-780"></span> |
| <span class="source-line-no">781</span><span id="line-781"> @Override</span> |
| <span class="source-line-no">782</span><span id="line-782"> public ExtendedCell getCell() {</span> |
| <span class="source-line-no">783</span><span id="line-783"> if (!isSeeked()) {</span> |
| <span class="source-line-no">784</span><span id="line-784"> return null;</span> |
| <span class="source-line-no">785</span><span id="line-785"> }</span> |
| <span class="source-line-no">786</span><span id="line-786"></span> |
| <span class="source-line-no">787</span><span id="line-787"> ExtendedCell ret;</span> |
| <span class="source-line-no">788</span><span id="line-788"> int cellBufSize = getKVBufSize();</span> |
| <span class="source-line-no">789</span><span id="line-789"> long seqId = 0L;</span> |
| <span class="source-line-no">790</span><span id="line-790"> if (this.reader.getHFileInfo().shouldIncludeMemStoreTS()) {</span> |
| <span class="source-line-no">791</span><span id="line-791"> seqId = currMemstoreTS;</span> |
| <span class="source-line-no">792</span><span id="line-792"> }</span> |
| <span class="source-line-no">793</span><span id="line-793"> if (blockBuffer.hasArray()) {</span> |
| <span class="source-line-no">794</span><span id="line-794"> // TODO : reduce the varieties of KV here. Check if based on a boolean</span> |
| <span class="source-line-no">795</span><span id="line-795"> // we can handle the 'no tags' case.</span> |
| <span class="source-line-no">796</span><span id="line-796"> if (currTagsLen > 0) {</span> |
| <span class="source-line-no">797</span><span id="line-797"> ret = new SizeCachedKeyValue(blockBuffer.array(),</span> |
| <span class="source-line-no">798</span><span id="line-798"> blockBuffer.arrayOffset() + blockBuffer.position(), cellBufSize, seqId, currKeyLen,</span> |
| <span class="source-line-no">799</span><span id="line-799"> rowLen);</span> |
| <span class="source-line-no">800</span><span id="line-800"> } else {</span> |
| <span class="source-line-no">801</span><span id="line-801"> ret = new SizeCachedNoTagsKeyValue(blockBuffer.array(),</span> |
| <span class="source-line-no">802</span><span id="line-802"> blockBuffer.arrayOffset() + blockBuffer.position(), cellBufSize, seqId, currKeyLen,</span> |
| <span class="source-line-no">803</span><span id="line-803"> rowLen);</span> |
| <span class="source-line-no">804</span><span id="line-804"> }</span> |
| <span class="source-line-no">805</span><span id="line-805"> } else {</span> |
| <span class="source-line-no">806</span><span id="line-806"> ByteBuffer buf = blockBuffer.asSubByteBuffer(cellBufSize);</span> |
| <span class="source-line-no">807</span><span id="line-807"> if (buf.isDirect()) {</span> |
| <span class="source-line-no">808</span><span id="line-808"> ret = currTagsLen > 0</span> |
| <span class="source-line-no">809</span><span id="line-809"> ? new SizeCachedByteBufferKeyValue(buf, buf.position(), cellBufSize, seqId, currKeyLen,</span> |
| <span class="source-line-no">810</span><span id="line-810"> rowLen)</span> |
| <span class="source-line-no">811</span><span id="line-811"> : new SizeCachedNoTagsByteBufferKeyValue(buf, buf.position(), cellBufSize, seqId,</span> |
| <span class="source-line-no">812</span><span id="line-812"> currKeyLen, rowLen);</span> |
| <span class="source-line-no">813</span><span id="line-813"> } else {</span> |
| <span class="source-line-no">814</span><span id="line-814"> if (currTagsLen > 0) {</span> |
| <span class="source-line-no">815</span><span id="line-815"> ret = new SizeCachedKeyValue(buf.array(), buf.arrayOffset() + buf.position(),</span> |
| <span class="source-line-no">816</span><span id="line-816"> cellBufSize, seqId, currKeyLen, rowLen);</span> |
| <span class="source-line-no">817</span><span id="line-817"> } else {</span> |
| <span class="source-line-no">818</span><span id="line-818"> ret = new SizeCachedNoTagsKeyValue(buf.array(), buf.arrayOffset() + buf.position(),</span> |
| <span class="source-line-no">819</span><span id="line-819"> cellBufSize, seqId, currKeyLen, rowLen);</span> |
| <span class="source-line-no">820</span><span id="line-820"> }</span> |
| <span class="source-line-no">821</span><span id="line-821"> }</span> |
| <span class="source-line-no">822</span><span id="line-822"> }</span> |
| <span class="source-line-no">823</span><span id="line-823"> return ret;</span> |
| <span class="source-line-no">824</span><span id="line-824"> }</span> |
| <span class="source-line-no">825</span><span id="line-825"></span> |
| <span class="source-line-no">826</span><span id="line-826"> @Override</span> |
| <span class="source-line-no">827</span><span id="line-827"> public ExtendedCell getKey() {</span> |
| <span class="source-line-no">828</span><span id="line-828"> assertSeeked();</span> |
| <span class="source-line-no">829</span><span id="line-829"> // Create a new object so that this getKey is cached as firstKey, lastKey</span> |
| <span class="source-line-no">830</span><span id="line-830"> ObjectIntPair<ByteBuffer> keyPair = new ObjectIntPair<>();</span> |
| <span class="source-line-no">831</span><span id="line-831"> blockBuffer.asSubByteBuffer(blockBuffer.position() + KEY_VALUE_LEN_SIZE, currKeyLen, keyPair);</span> |
| <span class="source-line-no">832</span><span id="line-832"> ByteBuffer keyBuf = keyPair.getFirst();</span> |
| <span class="source-line-no">833</span><span id="line-833"> if (keyBuf.hasArray()) {</span> |
| <span class="source-line-no">834</span><span id="line-834"> return new KeyValue.KeyOnlyKeyValue(keyBuf.array(),</span> |
| <span class="source-line-no">835</span><span id="line-835"> keyBuf.arrayOffset() + keyPair.getSecond(), currKeyLen);</span> |
| <span class="source-line-no">836</span><span id="line-836"> } else {</span> |
| <span class="source-line-no">837</span><span id="line-837"> // Better to do a copy here instead of holding on to this BB so that</span> |
| <span class="source-line-no">838</span><span id="line-838"> // we could release the blocks referring to this key. This key is specifically used</span> |
| <span class="source-line-no">839</span><span id="line-839"> // in HalfStoreFileReader to get the firstkey and lastkey by creating a new scanner</span> |
| <span class="source-line-no">840</span><span id="line-840"> // every time. So holding onto the BB (incase of DBB) is not advised here.</span> |
| <span class="source-line-no">841</span><span id="line-841"> byte[] key = new byte[currKeyLen];</span> |
| <span class="source-line-no">842</span><span id="line-842"> ByteBufferUtils.copyFromBufferToArray(key, keyBuf, keyPair.getSecond(), 0, currKeyLen);</span> |
| <span class="source-line-no">843</span><span id="line-843"> return new KeyValue.KeyOnlyKeyValue(key, 0, currKeyLen);</span> |
| <span class="source-line-no">844</span><span id="line-844"> }</span> |
| <span class="source-line-no">845</span><span id="line-845"> }</span> |
| <span class="source-line-no">846</span><span id="line-846"></span> |
| <span class="source-line-no">847</span><span id="line-847"> @Override</span> |
| <span class="source-line-no">848</span><span id="line-848"> public ByteBuffer getValue() {</span> |
| <span class="source-line-no">849</span><span id="line-849"> assertSeeked();</span> |
| <span class="source-line-no">850</span><span id="line-850"> // Okie to create new Pair. Not used in hot path</span> |
| <span class="source-line-no">851</span><span id="line-851"> ObjectIntPair<ByteBuffer> valuePair = new ObjectIntPair<>();</span> |
| <span class="source-line-no">852</span><span id="line-852"> this.blockBuffer.asSubByteBuffer(blockBuffer.position() + KEY_VALUE_LEN_SIZE + currKeyLen,</span> |
| <span class="source-line-no">853</span><span id="line-853"> currValueLen, valuePair);</span> |
| <span class="source-line-no">854</span><span id="line-854"> ByteBuffer valBuf = valuePair.getFirst().duplicate();</span> |
| <span class="source-line-no">855</span><span id="line-855"> valBuf.position(valuePair.getSecond());</span> |
| <span class="source-line-no">856</span><span id="line-856"> valBuf.limit(currValueLen + valuePair.getSecond());</span> |
| <span class="source-line-no">857</span><span id="line-857"> return valBuf.slice();</span> |
| <span class="source-line-no">858</span><span id="line-858"> }</span> |
| <span class="source-line-no">859</span><span id="line-859"></span> |
| <span class="source-line-no">860</span><span id="line-860"> protected void setNonSeekedState() {</span> |
| <span class="source-line-no">861</span><span id="line-861"> reset();</span> |
| <span class="source-line-no">862</span><span id="line-862"> blockBuffer = null;</span> |
| <span class="source-line-no">863</span><span id="line-863"> currKeyLen = 0;</span> |
| <span class="source-line-no">864</span><span id="line-864"> currValueLen = 0;</span> |
| <span class="source-line-no">865</span><span id="line-865"> currMemstoreTS = 0;</span> |
| <span class="source-line-no">866</span><span id="line-866"> currMemstoreTSLen = 0;</span> |
| <span class="source-line-no">867</span><span id="line-867"> currTagsLen = 0;</span> |
| <span class="source-line-no">868</span><span id="line-868"> }</span> |
| <span class="source-line-no">869</span><span id="line-869"></span> |
| <span class="source-line-no">870</span><span id="line-870"> /**</span> |
| <span class="source-line-no">871</span><span id="line-871"> * Set the position on current backing blockBuffer.</span> |
| <span class="source-line-no">872</span><span id="line-872"> */</span> |
| <span class="source-line-no">873</span><span id="line-873"> private void positionThisBlockBuffer() {</span> |
| <span class="source-line-no">874</span><span id="line-874"> try {</span> |
| <span class="source-line-no">875</span><span id="line-875"> blockBuffer.skip(getCurCellSerializedSize());</span> |
| <span class="source-line-no">876</span><span id="line-876"> } catch (IllegalArgumentException e) {</span> |
| <span class="source-line-no">877</span><span id="line-877"> LOG.error("Current pos = " + blockBuffer.position() + "; currKeyLen = " + currKeyLen</span> |
| <span class="source-line-no">878</span><span id="line-878"> + "; currValLen = " + currValueLen + "; block limit = " + blockBuffer.limit()</span> |
| <span class="source-line-no">879</span><span id="line-879"> + "; currBlock currBlockOffset = " + this.curBlock.getOffset() + "; path="</span> |
| <span class="source-line-no">880</span><span id="line-880"> + reader.getPath());</span> |
| <span class="source-line-no">881</span><span id="line-881"> throw e;</span> |
| <span class="source-line-no">882</span><span id="line-882"> }</span> |
| <span class="source-line-no">883</span><span id="line-883"> }</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"> * Set our selves up for the next 'next' invocation, set up next block.</span> |
| <span class="source-line-no">887</span><span id="line-887"> * @return True is more to read else false if at the end.</span> |
| <span class="source-line-no">888</span><span id="line-888"> */</span> |
| <span class="source-line-no">889</span><span id="line-889"> private boolean positionForNextBlock() throws IOException {</span> |
| <span class="source-line-no">890</span><span id="line-890"> // Methods are small so they get inlined because they are 'hot'.</span> |
| <span class="source-line-no">891</span><span id="line-891"> long lastDataBlockOffset = reader.getTrailer().getLastDataBlockOffset();</span> |
| <span class="source-line-no">892</span><span id="line-892"> if (this.curBlock.getOffset() >= lastDataBlockOffset) {</span> |
| <span class="source-line-no">893</span><span id="line-893"> setNonSeekedState();</span> |
| <span class="source-line-no">894</span><span id="line-894"> return false;</span> |
| <span class="source-line-no">895</span><span id="line-895"> }</span> |
| <span class="source-line-no">896</span><span id="line-896"> return isNextBlock();</span> |
| <span class="source-line-no">897</span><span id="line-897"> }</span> |
| <span class="source-line-no">898</span><span id="line-898"></span> |
| <span class="source-line-no">899</span><span id="line-899"> private boolean isNextBlock() throws IOException {</span> |
| <span class="source-line-no">900</span><span id="line-900"> // Methods are small so they get inlined because they are 'hot'.</span> |
| <span class="source-line-no">901</span><span id="line-901"> HFileBlock nextBlock = readNextDataBlock();</span> |
| <span class="source-line-no">902</span><span id="line-902"> if (nextBlock == null) {</span> |
| <span class="source-line-no">903</span><span id="line-903"> setNonSeekedState();</span> |
| <span class="source-line-no">904</span><span id="line-904"> return false;</span> |
| <span class="source-line-no">905</span><span id="line-905"> }</span> |
| <span class="source-line-no">906</span><span id="line-906"> updateCurrentBlock(nextBlock);</span> |
| <span class="source-line-no">907</span><span id="line-907"> return true;</span> |
| <span class="source-line-no">908</span><span id="line-908"> }</span> |
| <span class="source-line-no">909</span><span id="line-909"></span> |
| <span class="source-line-no">910</span><span id="line-910"> private final boolean _next() throws IOException {</span> |
| <span class="source-line-no">911</span><span id="line-911"> // Small method so can be inlined. It is a hot one.</span> |
| <span class="source-line-no">912</span><span id="line-912"> if (blockBuffer.remaining() <= 0) {</span> |
| <span class="source-line-no">913</span><span id="line-913"> return positionForNextBlock();</span> |
| <span class="source-line-no">914</span><span id="line-914"> }</span> |
| <span class="source-line-no">915</span><span id="line-915"></span> |
| <span class="source-line-no">916</span><span id="line-916"> // We are still in the same block.</span> |
| <span class="source-line-no">917</span><span id="line-917"> readKeyValueLen();</span> |
| <span class="source-line-no">918</span><span id="line-918"> return true;</span> |
| <span class="source-line-no">919</span><span id="line-919"> }</span> |
| <span class="source-line-no">920</span><span id="line-920"></span> |
| <span class="source-line-no">921</span><span id="line-921"> /**</span> |
| <span class="source-line-no">922</span><span id="line-922"> * Go to the next key/value in the block section. Loads the next block if necessary. If</span> |
| <span class="source-line-no">923</span><span id="line-923"> * successful, {@link #getKey()} and {@link #getValue()} can be called.</span> |
| <span class="source-line-no">924</span><span id="line-924"> * @return true if successfully navigated to the next key/value</span> |
| <span class="source-line-no">925</span><span id="line-925"> */</span> |
| <span class="source-line-no">926</span><span id="line-926"> @Override</span> |
| <span class="source-line-no">927</span><span id="line-927"> public boolean next() throws IOException {</span> |
| <span class="source-line-no">928</span><span id="line-928"> // This is a hot method so extreme measures taken to ensure it is small and inlineable.</span> |
| <span class="source-line-no">929</span><span id="line-929"> // Checked by setting: -XX:+UnlockDiagnosticVMOptions -XX:+PrintInlining -XX:+PrintCompilation</span> |
| <span class="source-line-no">930</span><span id="line-930"> assertSeeked();</span> |
| <span class="source-line-no">931</span><span id="line-931"> positionThisBlockBuffer();</span> |
| <span class="source-line-no">932</span><span id="line-932"> return _next();</span> |
| <span class="source-line-no">933</span><span id="line-933"> }</span> |
| <span class="source-line-no">934</span><span id="line-934"></span> |
| <span class="source-line-no">935</span><span id="line-935"> /**</span> |
| <span class="source-line-no">936</span><span id="line-936"> * Positions this scanner at the start of the file.</span> |
| <span class="source-line-no">937</span><span id="line-937"> * @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">938</span><span id="line-938"> * value are undefined.</span> |
| <span class="source-line-no">939</span><span id="line-939"> */</span> |
| <span class="source-line-no">940</span><span id="line-940"> @Override</span> |
| <span class="source-line-no">941</span><span id="line-941"> public boolean seekTo() throws IOException {</span> |
| <span class="source-line-no">942</span><span id="line-942"> if (reader == null) {</span> |
| <span class="source-line-no">943</span><span id="line-943"> return false;</span> |
| <span class="source-line-no">944</span><span id="line-944"> }</span> |
| <span class="source-line-no">945</span><span id="line-945"></span> |
| <span class="source-line-no">946</span><span id="line-946"> if (reader.getTrailer().getEntryCount() == 0) {</span> |
| <span class="source-line-no">947</span><span id="line-947"> // No data blocks.</span> |
| <span class="source-line-no">948</span><span id="line-948"> return false;</span> |
| <span class="source-line-no">949</span><span id="line-949"> }</span> |
| <span class="source-line-no">950</span><span id="line-950"></span> |
| <span class="source-line-no">951</span><span id="line-951"> long firstDataBlockOffset = reader.getTrailer().getFirstDataBlockOffset();</span> |
| <span class="source-line-no">952</span><span id="line-952"> if (curBlock != null && curBlock.getOffset() == firstDataBlockOffset) {</span> |
| <span class="source-line-no">953</span><span id="line-953"> return processFirstDataBlock();</span> |
| <span class="source-line-no">954</span><span id="line-954"> }</span> |
| <span class="source-line-no">955</span><span id="line-955"></span> |
| <span class="source-line-no">956</span><span id="line-956"> readAndUpdateNewBlock(firstDataBlockOffset);</span> |
| <span class="source-line-no">957</span><span id="line-957"> return true;</span> |
| <span class="source-line-no">958</span><span id="line-958"> }</span> |
| <span class="source-line-no">959</span><span id="line-959"></span> |
| <span class="source-line-no">960</span><span id="line-960"> protected boolean processFirstDataBlock() throws IOException {</span> |
| <span class="source-line-no">961</span><span id="line-961"> blockBuffer.rewind();</span> |
| <span class="source-line-no">962</span><span id="line-962"> readKeyValueLen();</span> |
| <span class="source-line-no">963</span><span id="line-963"> return true;</span> |
| <span class="source-line-no">964</span><span id="line-964"> }</span> |
| <span class="source-line-no">965</span><span id="line-965"></span> |
| <span class="source-line-no">966</span><span id="line-966"> protected void readAndUpdateNewBlock(long firstDataBlockOffset) throws IOException {</span> |
| <span class="source-line-no">967</span><span id="line-967"> HFileBlock newBlock = reader.readBlock(firstDataBlockOffset, -1, cacheBlocks, pread,</span> |
| <span class="source-line-no">968</span><span id="line-968"> isCompaction, true, BlockType.DATA, getEffectiveDataBlockEncoding());</span> |
| <span class="source-line-no">969</span><span id="line-969"> if (newBlock.getOffset() < 0) {</span> |
| <span class="source-line-no">970</span><span id="line-970"> releaseIfNotCurBlock(newBlock);</span> |
| <span class="source-line-no">971</span><span id="line-971"> throw new IOException(</span> |
| <span class="source-line-no">972</span><span id="line-972"> "Invalid offset=" + newBlock.getOffset() + ", path=" + reader.getPath());</span> |
| <span class="source-line-no">973</span><span id="line-973"> }</span> |
| <span class="source-line-no">974</span><span id="line-974"> updateCurrentBlock(newBlock);</span> |
| <span class="source-line-no">975</span><span id="line-975"> }</span> |
| <span class="source-line-no">976</span><span id="line-976"></span> |
| <span class="source-line-no">977</span><span id="line-977"> protected int loadBlockAndSeekToKey(HFileBlock seekToBlock, ExtendedCell nextIndexedKey,</span> |
| <span class="source-line-no">978</span><span id="line-978"> boolean rewind, ExtendedCell key, boolean seekBefore) throws IOException {</span> |
| <span class="source-line-no">979</span><span id="line-979"> if (this.curBlock == null || this.curBlock.getOffset() != seekToBlock.getOffset()) {</span> |
| <span class="source-line-no">980</span><span id="line-980"> updateCurrentBlock(seekToBlock);</span> |
| <span class="source-line-no">981</span><span id="line-981"> } else if (rewind) {</span> |
| <span class="source-line-no">982</span><span id="line-982"> blockBuffer.rewind();</span> |
| <span class="source-line-no">983</span><span id="line-983"> }</span> |
| <span class="source-line-no">984</span><span id="line-984"> // Update the nextIndexedKey</span> |
| <span class="source-line-no">985</span><span id="line-985"> this.nextIndexedKey = nextIndexedKey;</span> |
| <span class="source-line-no">986</span><span id="line-986"> return blockSeek(key, seekBefore);</span> |
| <span class="source-line-no">987</span><span id="line-987"> }</span> |
| <span class="source-line-no">988</span><span id="line-988"></span> |
| <span class="source-line-no">989</span><span id="line-989"> /** Returns True if v &lt;= 0 or v &gt; current block buffer limit. */</span> |
| <span class="source-line-no">990</span><span id="line-990"> protected final boolean checkKeyLen(final int v) {</span> |
| <span class="source-line-no">991</span><span id="line-991"> return v <= 0 || v > this.blockBuffer.limit();</span> |
| <span class="source-line-no">992</span><span id="line-992"> }</span> |
| <span class="source-line-no">993</span><span id="line-993"></span> |
| <span class="source-line-no">994</span><span id="line-994"> /** Returns True if v &lt; 0 or v &gt; current block buffer limit. */</span> |
| <span class="source-line-no">995</span><span id="line-995"> protected final boolean checkLen(final int v) {</span> |
| <span class="source-line-no">996</span><span id="line-996"> return v < 0 || v > this.blockBuffer.limit();</span> |
| <span class="source-line-no">997</span><span id="line-997"> }</span> |
| <span class="source-line-no">998</span><span id="line-998"></span> |
| <span class="source-line-no">999</span><span id="line-999"> /**</span> |
| <span class="source-line-no">1000</span><span id="line-1000"> * Check key and value lengths are wholesome.</span> |
| <span class="source-line-no">1001</span><span id="line-1001"> */</span> |
| <span class="source-line-no">1002</span><span id="line-1002"> protected final void checkKeyValueLen() {</span> |
| <span class="source-line-no">1003</span><span id="line-1003"> if (checkKeyLen(this.currKeyLen) || checkLen(this.currValueLen)) {</span> |
| <span class="source-line-no">1004</span><span id="line-1004"> throw new IllegalStateException("Invalid currKeyLen " + this.currKeyLen</span> |
| <span class="source-line-no">1005</span><span id="line-1005"> + " or currValueLen " + this.currValueLen + ". Block offset: " + this.curBlock.getOffset()</span> |
| <span class="source-line-no">1006</span><span id="line-1006"> + ", block length: " + this.blockBuffer.limit() + ", position: "</span> |
| <span class="source-line-no">1007</span><span id="line-1007"> + this.blockBuffer.position() + " (without header)." + ", path=" + reader.getPath());</span> |
| <span class="source-line-no">1008</span><span id="line-1008"> }</span> |
| <span class="source-line-no">1009</span><span id="line-1009"> }</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"> * Updates the current block to be the given {@link HFileBlock}. Seeks to the the first</span> |
| <span class="source-line-no">1013</span><span id="line-1013"> * key/value pair.</span> |
| <span class="source-line-no">1014</span><span id="line-1014"> * @param newBlock the block read by {@link HFileReaderImpl#readBlock}, it's a totally new block</span> |
| <span class="source-line-no">1015</span><span id="line-1015"> * with new allocated {@link ByteBuff}, so if no further reference to this</span> |
| <span class="source-line-no">1016</span><span id="line-1016"> * block, we should release it carefully.</span> |
| <span class="source-line-no">1017</span><span id="line-1017"> */</span> |
| <span class="source-line-no">1018</span><span id="line-1018"> protected void updateCurrentBlock(HFileBlock newBlock) throws IOException {</span> |
| <span class="source-line-no">1019</span><span id="line-1019"> try {</span> |
| <span class="source-line-no">1020</span><span id="line-1020"> if (newBlock.getBlockType() != BlockType.DATA) {</span> |
| <span class="source-line-no">1021</span><span id="line-1021"> throw new IllegalStateException(</span> |
| <span class="source-line-no">1022</span><span id="line-1022"> "ScannerV2 works only on data blocks, got " + newBlock.getBlockType() + "; "</span> |
| <span class="source-line-no">1023</span><span id="line-1023"> + "HFileName=" + reader.getPath() + ", " + "dataBlockEncoder="</span> |
| <span class="source-line-no">1024</span><span id="line-1024"> + reader.getDataBlockEncoding() + ", " + "isCompaction=" + isCompaction);</span> |
| <span class="source-line-no">1025</span><span id="line-1025"> }</span> |
| <span class="source-line-no">1026</span><span id="line-1026"> updateCurrBlockRef(newBlock);</span> |
| <span class="source-line-no">1027</span><span id="line-1027"> blockBuffer = newBlock.getBufferWithoutHeader();</span> |
| <span class="source-line-no">1028</span><span id="line-1028"> readKeyValueLen();</span> |
| <span class="source-line-no">1029</span><span id="line-1029"> } finally {</span> |
| <span class="source-line-no">1030</span><span id="line-1030"> releaseIfNotCurBlock(newBlock);</span> |
| <span class="source-line-no">1031</span><span id="line-1031"> }</span> |
| <span class="source-line-no">1032</span><span id="line-1032"> // Reset the next indexed key</span> |
| <span class="source-line-no">1033</span><span id="line-1033"> this.nextIndexedKey = null;</span> |
| <span class="source-line-no">1034</span><span id="line-1034"> }</span> |
| <span class="source-line-no">1035</span><span id="line-1035"></span> |
| <span class="source-line-no">1036</span><span id="line-1036"> protected ExtendedCell getFirstKeyCellInBlock(HFileBlock curBlock) {</span> |
| <span class="source-line-no">1037</span><span id="line-1037"> ByteBuff buffer = curBlock.getBufferWithoutHeader();</span> |
| <span class="source-line-no">1038</span><span id="line-1038"> // It is safe to manipulate this buffer because we own the buffer object.</span> |
| <span class="source-line-no">1039</span><span id="line-1039"> buffer.rewind();</span> |
| <span class="source-line-no">1040</span><span id="line-1040"> int klen = buffer.getInt();</span> |
| <span class="source-line-no">1041</span><span id="line-1041"> buffer.skip(Bytes.SIZEOF_INT);// Skip value len part</span> |
| <span class="source-line-no">1042</span><span id="line-1042"> ByteBuffer keyBuff = buffer.asSubByteBuffer(klen);</span> |
| <span class="source-line-no">1043</span><span id="line-1043"> if (keyBuff.hasArray()) {</span> |
| <span class="source-line-no">1044</span><span id="line-1044"> return new KeyValue.KeyOnlyKeyValue(keyBuff.array(),</span> |
| <span class="source-line-no">1045</span><span id="line-1045"> keyBuff.arrayOffset() + keyBuff.position(), klen);</span> |
| <span class="source-line-no">1046</span><span id="line-1046"> } else {</span> |
| <span class="source-line-no">1047</span><span id="line-1047"> return new ByteBufferKeyOnlyKeyValue(keyBuff, keyBuff.position(), klen);</span> |
| <span class="source-line-no">1048</span><span id="line-1048"> }</span> |
| <span class="source-line-no">1049</span><span id="line-1049"> }</span> |
| <span class="source-line-no">1050</span><span id="line-1050"></span> |
| <span class="source-line-no">1051</span><span id="line-1051"> public int compareKey(CellComparator comparator, ExtendedCell key) {</span> |
| <span class="source-line-no">1052</span><span id="line-1052"> blockBuffer.asSubByteBuffer(blockBuffer.position() + KEY_VALUE_LEN_SIZE, currKeyLen, pair);</span> |
| <span class="source-line-no">1053</span><span id="line-1053"> this.bufBackedKeyOnlyKv.setKey(pair.getFirst(), pair.getSecond(), currKeyLen, rowLen);</span> |
| <span class="source-line-no">1054</span><span id="line-1054"> return PrivateCellUtil.compareKeyIgnoresMvcc(comparator, key, this.bufBackedKeyOnlyKv);</span> |
| <span class="source-line-no">1055</span><span id="line-1055"> }</span> |
| <span class="source-line-no">1056</span><span id="line-1056"></span> |
| <span class="source-line-no">1057</span><span id="line-1057"> @Override</span> |
| <span class="source-line-no">1058</span><span id="line-1058"> public void shipped() throws IOException {</span> |
| <span class="source-line-no">1059</span><span id="line-1059"> this.returnBlocks(false);</span> |
| <span class="source-line-no">1060</span><span id="line-1060"> }</span> |
| <span class="source-line-no">1061</span><span id="line-1061"> }</span> |
| <span class="source-line-no">1062</span><span id="line-1062"></span> |
| <span class="source-line-no">1063</span><span id="line-1063"> @Override</span> |
| <span class="source-line-no">1064</span><span id="line-1064"> public Path getPath() {</span> |
| <span class="source-line-no">1065</span><span id="line-1065"> return path;</span> |
| <span class="source-line-no">1066</span><span id="line-1066"> }</span> |
| <span class="source-line-no">1067</span><span id="line-1067"></span> |
| <span class="source-line-no">1068</span><span id="line-1068"> @Override</span> |
| <span class="source-line-no">1069</span><span id="line-1069"> public DataBlockEncoding getDataBlockEncoding() {</span> |
| <span class="source-line-no">1070</span><span id="line-1070"> return dataBlockEncoder.getDataBlockEncoding();</span> |
| <span class="source-line-no">1071</span><span id="line-1071"> }</span> |
| <span class="source-line-no">1072</span><span id="line-1072"></span> |
| <span class="source-line-no">1073</span><span id="line-1073"> @Override</span> |
| <span class="source-line-no">1074</span><span id="line-1074"> public Configuration getConf() {</span> |
| <span class="source-line-no">1075</span><span id="line-1075"> return conf;</span> |
| <span class="source-line-no">1076</span><span id="line-1076"> }</span> |
| <span class="source-line-no">1077</span><span id="line-1077"></span> |
| <span class="source-line-no">1078</span><span id="line-1078"> @Override</span> |
| <span class="source-line-no">1079</span><span id="line-1079"> public void setConf(Configuration conf) {</span> |
| <span class="source-line-no">1080</span><span id="line-1080"> this.conf = conf;</span> |
| <span class="source-line-no">1081</span><span id="line-1081"> }</span> |
| <span class="source-line-no">1082</span><span id="line-1082"></span> |
| <span class="source-line-no">1083</span><span id="line-1083"> /** Minor versions in HFile starting with this number have hbase checksums */</span> |
| <span class="source-line-no">1084</span><span id="line-1084"> public static final int MINOR_VERSION_WITH_CHECKSUM = 1;</span> |
| <span class="source-line-no">1085</span><span id="line-1085"> /** In HFile minor version that does not support checksums */</span> |
| <span class="source-line-no">1086</span><span id="line-1086"> public static final int MINOR_VERSION_NO_CHECKSUM = 0;</span> |
| <span class="source-line-no">1087</span><span id="line-1087"></span> |
| <span class="source-line-no">1088</span><span id="line-1088"> /** HFile minor version that introduced pbuf filetrailer */</span> |
| <span class="source-line-no">1089</span><span id="line-1089"> public static final int PBUF_TRAILER_MINOR_VERSION = 2;</span> |
| <span class="source-line-no">1090</span><span id="line-1090"></span> |
| <span class="source-line-no">1091</span><span id="line-1091"> /**</span> |
| <span class="source-line-no">1092</span><span id="line-1092"> * The size of a (key length, value length) tuple that prefixes each entry in a data block.</span> |
| <span class="source-line-no">1093</span><span id="line-1093"> */</span> |
| <span class="source-line-no">1094</span><span id="line-1094"> public final static int KEY_VALUE_LEN_SIZE = 2 * Bytes.SIZEOF_INT;</span> |
| <span class="source-line-no">1095</span><span id="line-1095"></span> |
| <span class="source-line-no">1096</span><span id="line-1096"> /**</span> |
| <span class="source-line-no">1097</span><span id="line-1097"> * Retrieve block from cache. Validates the retrieved block's type vs {@code expectedBlockType}</span> |
| <span class="source-line-no">1098</span><span id="line-1098"> * and its encoding vs. {@code expectedDataBlockEncoding}. Unpacks the block as necessary.</span> |
| <span class="source-line-no">1099</span><span id="line-1099"> */</span> |
| <span class="source-line-no">1100</span><span id="line-1100"> private HFileBlock getCachedBlock(BlockCacheKey cacheKey, boolean cacheBlock, boolean useLock,</span> |
| <span class="source-line-no">1101</span><span id="line-1101"> boolean updateCacheMetrics, BlockType expectedBlockType,</span> |
| <span class="source-line-no">1102</span><span id="line-1102"> DataBlockEncoding expectedDataBlockEncoding) throws IOException {</span> |
| <span class="source-line-no">1103</span><span id="line-1103"> // Check cache for block. If found return.</span> |
| <span class="source-line-no">1104</span><span id="line-1104"> BlockCache cache = cacheConf.getBlockCache().orElse(null);</span> |
| <span class="source-line-no">1105</span><span id="line-1105"> if (cache != null) {</span> |
| <span class="source-line-no">1106</span><span id="line-1106"> HFileBlock cachedBlock = (HFileBlock) cache.getBlock(cacheKey, cacheBlock, useLock,</span> |
| <span class="source-line-no">1107</span><span id="line-1107"> updateCacheMetrics, expectedBlockType);</span> |
| <span class="source-line-no">1108</span><span id="line-1108"> if (cachedBlock != null) {</span> |
| <span class="source-line-no">1109</span><span id="line-1109"> if (cacheConf.shouldCacheCompressed(cachedBlock.getBlockType().getCategory())) {</span> |
| <span class="source-line-no">1110</span><span id="line-1110"> HFileBlock compressedBlock = cachedBlock;</span> |
| <span class="source-line-no">1111</span><span id="line-1111"> cachedBlock = compressedBlock.unpack(hfileContext, fsBlockReader);</span> |
| <span class="source-line-no">1112</span><span id="line-1112"> // In case of compressed block after unpacking we can release the compressed block</span> |
| <span class="source-line-no">1113</span><span id="line-1113"> if (compressedBlock != cachedBlock) {</span> |
| <span class="source-line-no">1114</span><span id="line-1114"> compressedBlock.release();</span> |
| <span class="source-line-no">1115</span><span id="line-1115"> }</span> |
| <span class="source-line-no">1116</span><span id="line-1116"> }</span> |
| <span class="source-line-no">1117</span><span id="line-1117"> try {</span> |
| <span class="source-line-no">1118</span><span id="line-1118"> validateBlockType(cachedBlock, expectedBlockType);</span> |
| <span class="source-line-no">1119</span><span id="line-1119"> } catch (IOException e) {</span> |
| <span class="source-line-no">1120</span><span id="line-1120"> returnAndEvictBlock(cache, cacheKey, cachedBlock);</span> |
| <span class="source-line-no">1121</span><span id="line-1121"> throw e;</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"> if (expectedDataBlockEncoding == null) {</span> |
| <span class="source-line-no">1125</span><span id="line-1125"> return cachedBlock;</span> |
| <span class="source-line-no">1126</span><span id="line-1126"> }</span> |
| <span class="source-line-no">1127</span><span id="line-1127"> DataBlockEncoding actualDataBlockEncoding = cachedBlock.getDataBlockEncoding();</span> |
| <span class="source-line-no">1128</span><span id="line-1128"> // Block types other than data blocks always have</span> |
| <span class="source-line-no">1129</span><span id="line-1129"> // DataBlockEncoding.NONE. To avoid false negative cache misses, only</span> |
| <span class="source-line-no">1130</span><span id="line-1130"> // perform this check if cached block is a data block.</span> |
| <span class="source-line-no">1131</span><span id="line-1131"> if (</span> |
| <span class="source-line-no">1132</span><span id="line-1132"> cachedBlock.getBlockType().isData()</span> |
| <span class="source-line-no">1133</span><span id="line-1133"> && !actualDataBlockEncoding.equals(expectedDataBlockEncoding)</span> |
| <span class="source-line-no">1134</span><span id="line-1134"> ) {</span> |
| <span class="source-line-no">1135</span><span id="line-1135"> // This mismatch may happen if a Scanner, which is used for say a</span> |
| <span class="source-line-no">1136</span><span id="line-1136"> // compaction, tries to read an encoded block from the block cache.</span> |
| <span class="source-line-no">1137</span><span id="line-1137"> // The reverse might happen when an EncodedScanner tries to read</span> |
| <span class="source-line-no">1138</span><span id="line-1138"> // un-encoded blocks which were cached earlier.</span> |
| <span class="source-line-no">1139</span><span id="line-1139"> //</span> |
| <span class="source-line-no">1140</span><span id="line-1140"> // Because returning a data block with an implicit BlockType mismatch</span> |
| <span class="source-line-no">1141</span><span id="line-1141"> // will cause the requesting scanner to throw a disk read should be</span> |
| <span class="source-line-no">1142</span><span id="line-1142"> // forced here. This will potentially cause a significant number of</span> |
| <span class="source-line-no">1143</span><span id="line-1143"> // cache misses, so update so we should keep track of this as it might</span> |
| <span class="source-line-no">1144</span><span id="line-1144"> // justify the work on a CompoundScanner.</span> |
| <span class="source-line-no">1145</span><span id="line-1145"> if (</span> |
| <span class="source-line-no">1146</span><span id="line-1146"> !expectedDataBlockEncoding.equals(DataBlockEncoding.NONE)</span> |
| <span class="source-line-no">1147</span><span id="line-1147"> && !actualDataBlockEncoding.equals(DataBlockEncoding.NONE)</span> |
| <span class="source-line-no">1148</span><span id="line-1148"> ) {</span> |
| <span class="source-line-no">1149</span><span id="line-1149"> // If the block is encoded but the encoding does not match the</span> |
| <span class="source-line-no">1150</span><span id="line-1150"> // expected encoding it is likely the encoding was changed but the</span> |
| <span class="source-line-no">1151</span><span id="line-1151"> // block was not yet evicted. Evictions on file close happen async</span> |
| <span class="source-line-no">1152</span><span id="line-1152"> // so blocks with the old encoding still linger in cache for some</span> |
| <span class="source-line-no">1153</span><span id="line-1153"> // period of time. This event should be rare as it only happens on</span> |
| <span class="source-line-no">1154</span><span id="line-1154"> // schema definition change.</span> |
| <span class="source-line-no">1155</span><span id="line-1155"> LOG.info(</span> |
| <span class="source-line-no">1156</span><span id="line-1156"> "Evicting cached block with key {} because data block encoding mismatch; "</span> |
| <span class="source-line-no">1157</span><span id="line-1157"> + "expected {}, actual {}, path={}",</span> |
| <span class="source-line-no">1158</span><span id="line-1158"> cacheKey, actualDataBlockEncoding, expectedDataBlockEncoding, path);</span> |
| <span class="source-line-no">1159</span><span id="line-1159"> // This is an error scenario. so here we need to release the block.</span> |
| <span class="source-line-no">1160</span><span id="line-1160"> returnAndEvictBlock(cache, cacheKey, cachedBlock);</span> |
| <span class="source-line-no">1161</span><span id="line-1161"> }</span> |
| <span class="source-line-no">1162</span><span id="line-1162"> return null;</span> |
| <span class="source-line-no">1163</span><span id="line-1163"> }</span> |
| <span class="source-line-no">1164</span><span id="line-1164"> return cachedBlock;</span> |
| <span class="source-line-no">1165</span><span id="line-1165"> }</span> |
| <span class="source-line-no">1166</span><span id="line-1166"> }</span> |
| <span class="source-line-no">1167</span><span id="line-1167"> return null;</span> |
| <span class="source-line-no">1168</span><span id="line-1168"> }</span> |
| <span class="source-line-no">1169</span><span id="line-1169"></span> |
| <span class="source-line-no">1170</span><span id="line-1170"> private void returnAndEvictBlock(BlockCache cache, BlockCacheKey cacheKey, Cacheable block) {</span> |
| <span class="source-line-no">1171</span><span id="line-1171"> block.release();</span> |
| <span class="source-line-no">1172</span><span id="line-1172"> cache.evictBlock(cacheKey);</span> |
| <span class="source-line-no">1173</span><span id="line-1173"> }</span> |
| <span class="source-line-no">1174</span><span id="line-1174"></span> |
| <span class="source-line-no">1175</span><span id="line-1175"> /**</span> |
| <span class="source-line-no">1176</span><span id="line-1176"> * @param cacheBlock Add block to cache, if found</span> |
| <span class="source-line-no">1177</span><span id="line-1177"> * @return block wrapped in a ByteBuffer, with header skipped</span> |
| <span class="source-line-no">1178</span><span id="line-1178"> */</span> |
| <span class="source-line-no">1179</span><span id="line-1179"> @Override</span> |
| <span class="source-line-no">1180</span><span id="line-1180"> public HFileBlock getMetaBlock(String metaBlockName, boolean cacheBlock) throws IOException {</span> |
| <span class="source-line-no">1181</span><span id="line-1181"> if (trailer.getMetaIndexCount() == 0) {</span> |
| <span class="source-line-no">1182</span><span id="line-1182"> return null; // there are no meta blocks</span> |
| <span class="source-line-no">1183</span><span id="line-1183"> }</span> |
| <span class="source-line-no">1184</span><span id="line-1184"> if (metaBlockIndexReader == null) {</span> |
| <span class="source-line-no">1185</span><span id="line-1185"> throw new IOException(path + " meta index not loaded");</span> |
| <span class="source-line-no">1186</span><span id="line-1186"> }</span> |
| <span class="source-line-no">1187</span><span id="line-1187"></span> |
| <span class="source-line-no">1188</span><span id="line-1188"> byte[] mbname = Bytes.toBytes(metaBlockName);</span> |
| <span class="source-line-no">1189</span><span id="line-1189"> int block = metaBlockIndexReader.rootBlockContainingKey(mbname, 0, mbname.length);</span> |
| <span class="source-line-no">1190</span><span id="line-1190"> if (block == -1) {</span> |
| <span class="source-line-no">1191</span><span id="line-1191"> return null;</span> |
| <span class="source-line-no">1192</span><span id="line-1192"> }</span> |
| <span class="source-line-no">1193</span><span id="line-1193"> long blockSize = metaBlockIndexReader.getRootBlockDataSize(block);</span> |
| <span class="source-line-no">1194</span><span id="line-1194"></span> |
| <span class="source-line-no">1195</span><span id="line-1195"> // Per meta key from any given file, synchronize reads for said block. This</span> |
| <span class="source-line-no">1196</span><span id="line-1196"> // is OK to do for meta blocks because the meta block index is always</span> |
| <span class="source-line-no">1197</span><span id="line-1197"> // single-level.</span> |
| <span class="source-line-no">1198</span><span id="line-1198"> synchronized (metaBlockIndexReader.getRootBlockKey(block)) {</span> |
| <span class="source-line-no">1199</span><span id="line-1199"> // Check cache for block. If found return.</span> |
| <span class="source-line-no">1200</span><span id="line-1200"> long metaBlockOffset = metaBlockIndexReader.getRootBlockOffset(block);</span> |
| <span class="source-line-no">1201</span><span id="line-1201"> BlockCacheKey cacheKey =</span> |
| <span class="source-line-no">1202</span><span id="line-1202"> new BlockCacheKey(name, metaBlockOffset, this.isPrimaryReplicaReader(), BlockType.META);</span> |
| <span class="source-line-no">1203</span><span id="line-1203"></span> |
| <span class="source-line-no">1204</span><span id="line-1204"> cacheBlock &= cacheConf.shouldCacheBlockOnRead(BlockType.META.getCategory());</span> |
| <span class="source-line-no">1205</span><span id="line-1205"> HFileBlock cachedBlock =</span> |
| <span class="source-line-no">1206</span><span id="line-1206"> getCachedBlock(cacheKey, cacheBlock, false, true, BlockType.META, null);</span> |
| <span class="source-line-no">1207</span><span id="line-1207"> if (cachedBlock != null) {</span> |
| <span class="source-line-no">1208</span><span id="line-1208"> assert cachedBlock.isUnpacked() : "Packed block leak.";</span> |
| <span class="source-line-no">1209</span><span id="line-1209"> // Return a distinct 'shallow copy' of the block,</span> |
| <span class="source-line-no">1210</span><span id="line-1210"> // so pos does not get messed by the scanner</span> |
| <span class="source-line-no">1211</span><span id="line-1211"> return cachedBlock;</span> |
| <span class="source-line-no">1212</span><span id="line-1212"> }</span> |
| <span class="source-line-no">1213</span><span id="line-1213"> // Cache Miss, please load.</span> |
| <span class="source-line-no">1214</span><span id="line-1214"></span> |
| <span class="source-line-no">1215</span><span id="line-1215"> HFileBlock compressedBlock =</span> |
| <span class="source-line-no">1216</span><span id="line-1216"> fsBlockReader.readBlockData(metaBlockOffset, blockSize, true, false, true);</span> |
| <span class="source-line-no">1217</span><span id="line-1217"> HFileBlock uncompressedBlock = compressedBlock.unpack(hfileContext, fsBlockReader);</span> |
| <span class="source-line-no">1218</span><span id="line-1218"> if (compressedBlock != uncompressedBlock) {</span> |
| <span class="source-line-no">1219</span><span id="line-1219"> compressedBlock.release();</span> |
| <span class="source-line-no">1220</span><span id="line-1220"> }</span> |
| <span class="source-line-no">1221</span><span id="line-1221"></span> |
| <span class="source-line-no">1222</span><span id="line-1222"> // Cache the block</span> |
| <span class="source-line-no">1223</span><span id="line-1223"> if (cacheBlock) {</span> |
| <span class="source-line-no">1224</span><span id="line-1224"> cacheConf.getBlockCache().ifPresent(</span> |
| <span class="source-line-no">1225</span><span id="line-1225"> cache -> cache.cacheBlock(cacheKey, uncompressedBlock, cacheConf.isInMemory()));</span> |
| <span class="source-line-no">1226</span><span id="line-1226"> }</span> |
| <span class="source-line-no">1227</span><span id="line-1227"> return uncompressedBlock;</span> |
| <span class="source-line-no">1228</span><span id="line-1228"> }</span> |
| <span class="source-line-no">1229</span><span id="line-1229"> }</span> |
| <span class="source-line-no">1230</span><span id="line-1230"></span> |
| <span class="source-line-no">1231</span><span id="line-1231"> /**</span> |
| <span class="source-line-no">1232</span><span id="line-1232"> * Whether we use heap or not depends on our intent to cache the block. We want to avoid</span> |
| <span class="source-line-no">1233</span><span id="line-1233"> * 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">1234</span><span id="line-1234"> * efficient to allocate to off-heap since we can control GC ourselves for those. So our decision</span> |
| <span class="source-line-no">1235</span><span id="line-1235"> * here breaks down as follows: <br></span> |
| <span class="source-line-no">1236</span><span id="line-1236"> * If block cache is disabled, don't use heap. If we're not using the CombinedBlockCache, use heap</span> |
| <span class="source-line-no">1237</span><span id="line-1237"> * unless caching is disabled for the request. Otherwise, only use heap if caching is enabled and</span> |
| <span class="source-line-no">1238</span><span id="line-1238"> * the expected block type is not DATA (which goes to off-heap L2 in combined cache).</span> |
| <span class="source-line-no">1239</span><span id="line-1239"> * @see org.apache.hadoop.hbase.io.hfile.HFileBlock.FSReader#readBlockData(long, long, boolean,</span> |
| <span class="source-line-no">1240</span><span id="line-1240"> * boolean, boolean)</span> |
| <span class="source-line-no">1241</span><span id="line-1241"> */</span> |
| <span class="source-line-no">1242</span><span id="line-1242"> private boolean shouldUseHeap(BlockType expectedBlockType, boolean cacheBlock) {</span> |
| <span class="source-line-no">1243</span><span id="line-1243"> if (!cacheConf.getBlockCache().isPresent()) {</span> |
| <span class="source-line-no">1244</span><span id="line-1244"> return false;</span> |
| <span class="source-line-no">1245</span><span id="line-1245"> }</span> |
| <span class="source-line-no">1246</span><span id="line-1246"></span> |
| <span class="source-line-no">1247</span><span id="line-1247"> // we only cache a block if cacheBlock is true and caching-on-read is enabled in CacheConfig</span> |
| <span class="source-line-no">1248</span><span id="line-1248"> // we can really only check for that if have an expectedBlockType</span> |
| <span class="source-line-no">1249</span><span id="line-1249"> if (expectedBlockType != null) {</span> |
| <span class="source-line-no">1250</span><span id="line-1250"> cacheBlock &= cacheConf.shouldCacheBlockOnRead(expectedBlockType.getCategory());</span> |
| <span class="source-line-no">1251</span><span id="line-1251"> }</span> |
| <span class="source-line-no">1252</span><span id="line-1252"></span> |
| <span class="source-line-no">1253</span><span id="line-1253"> if (!cacheConf.isCombinedBlockCache()) {</span> |
| <span class="source-line-no">1254</span><span id="line-1254"> // Block to cache in LruBlockCache must be an heap one, if caching enabled. So just allocate</span> |
| <span class="source-line-no">1255</span><span id="line-1255"> // block memory from heap for saving an extra off-heap to heap copying in that case.</span> |
| <span class="source-line-no">1256</span><span id="line-1256"> return cacheBlock;</span> |
| <span class="source-line-no">1257</span><span id="line-1257"> }</span> |
| <span class="source-line-no">1258</span><span id="line-1258"></span> |
| <span class="source-line-no">1259</span><span id="line-1259"> return cacheBlock && expectedBlockType != null && !expectedBlockType.isData();</span> |
| <span class="source-line-no">1260</span><span id="line-1260"> }</span> |
| <span class="source-line-no">1261</span><span id="line-1261"></span> |
| <span class="source-line-no">1262</span><span id="line-1262"> @Override</span> |
| <span class="source-line-no">1263</span><span id="line-1263"> public HFileBlock readBlock(long dataBlockOffset, long onDiskBlockSize, final boolean cacheBlock,</span> |
| <span class="source-line-no">1264</span><span id="line-1264"> boolean pread, final boolean isCompaction, boolean updateCacheMetrics,</span> |
| <span class="source-line-no">1265</span><span id="line-1265"> BlockType expectedBlockType, DataBlockEncoding expectedDataBlockEncoding) throws IOException {</span> |
| <span class="source-line-no">1266</span><span id="line-1266"> return readBlock(dataBlockOffset, onDiskBlockSize, cacheBlock, pread, isCompaction,</span> |
| <span class="source-line-no">1267</span><span id="line-1267"> updateCacheMetrics, expectedBlockType, expectedDataBlockEncoding, false);</span> |
| <span class="source-line-no">1268</span><span id="line-1268"> }</span> |
| <span class="source-line-no">1269</span><span id="line-1269"></span> |
| <span class="source-line-no">1270</span><span id="line-1270"> @Override</span> |
| <span class="source-line-no">1271</span><span id="line-1271"> public HFileBlock readBlock(long dataBlockOffset, long onDiskBlockSize, final boolean cacheBlock,</span> |
| <span class="source-line-no">1272</span><span id="line-1272"> boolean pread, final boolean isCompaction, boolean updateCacheMetrics,</span> |
| <span class="source-line-no">1273</span><span id="line-1273"> BlockType expectedBlockType, DataBlockEncoding expectedDataBlockEncoding, boolean cacheOnly)</span> |
| <span class="source-line-no">1274</span><span id="line-1274"> throws IOException {</span> |
| <span class="source-line-no">1275</span><span id="line-1275"> if (dataBlockIndexReader == null) {</span> |
| <span class="source-line-no">1276</span><span id="line-1276"> throw new IOException(path + " block index not loaded");</span> |
| <span class="source-line-no">1277</span><span id="line-1277"> }</span> |
| <span class="source-line-no">1278</span><span id="line-1278"> long trailerOffset = trailer.getLoadOnOpenDataOffset();</span> |
| <span class="source-line-no">1279</span><span id="line-1279"> if (dataBlockOffset < 0 || dataBlockOffset >= trailerOffset) {</span> |
| <span class="source-line-no">1280</span><span id="line-1280"> throw new IOException("Requested block is out of range: " + dataBlockOffset</span> |
| <span class="source-line-no">1281</span><span id="line-1281"> + ", lastDataBlockOffset: " + trailer.getLastDataBlockOffset()</span> |
| <span class="source-line-no">1282</span><span id="line-1282"> + ", trailer.getLoadOnOpenDataOffset: " + trailerOffset + ", path=" + path);</span> |
| <span class="source-line-no">1283</span><span id="line-1283"> }</span> |
| <span class="source-line-no">1284</span><span id="line-1284"> // For any given block from any given file, synchronize reads for said</span> |
| <span class="source-line-no">1285</span><span id="line-1285"> // block.</span> |
| <span class="source-line-no">1286</span><span id="line-1286"> // Without a cache, this synchronizing is needless overhead, but really</span> |
| <span class="source-line-no">1287</span><span id="line-1287"> // the other choice is to duplicate work (which the cache would prevent you</span> |
| <span class="source-line-no">1288</span><span id="line-1288"> // from doing).</span> |
| <span class="source-line-no">1289</span><span id="line-1289"></span> |
| <span class="source-line-no">1290</span><span id="line-1290"> BlockCacheKey cacheKey =</span> |
| <span class="source-line-no">1291</span><span id="line-1291"> new BlockCacheKey(path, dataBlockOffset, this.isPrimaryReplicaReader(), expectedBlockType);</span> |
| <span class="source-line-no">1292</span><span id="line-1292"> Attributes attributes = Attributes.of(BLOCK_CACHE_KEY_KEY, cacheKey.toString());</span> |
| <span class="source-line-no">1293</span><span id="line-1293"></span> |
| <span class="source-line-no">1294</span><span id="line-1294"> boolean useLock = false;</span> |
| <span class="source-line-no">1295</span><span id="line-1295"> IdLock.Entry lockEntry = null;</span> |
| <span class="source-line-no">1296</span><span id="line-1296"> final Span span = Span.current();</span> |
| <span class="source-line-no">1297</span><span id="line-1297"> try {</span> |
| <span class="source-line-no">1298</span><span id="line-1298"> while (true) {</span> |
| <span class="source-line-no">1299</span><span id="line-1299"> // Check cache for block. If found return.</span> |
| <span class="source-line-no">1300</span><span id="line-1300"> if (cacheConf.shouldReadBlockFromCache(expectedBlockType) && !cacheOnly) {</span> |
| <span class="source-line-no">1301</span><span id="line-1301"> if (useLock) {</span> |
| <span class="source-line-no">1302</span><span id="line-1302"> lockEntry = offsetLock.getLockEntry(dataBlockOffset);</span> |
| <span class="source-line-no">1303</span><span id="line-1303"> }</span> |
| <span class="source-line-no">1304</span><span id="line-1304"> // Try and get the block from the block cache. If the useLock variable is true then this</span> |
| <span class="source-line-no">1305</span><span id="line-1305"> // is the second time through the loop and it should not be counted as a block cache miss.</span> |
| <span class="source-line-no">1306</span><span id="line-1306"> HFileBlock cachedBlock = getCachedBlock(cacheKey, cacheBlock, useLock, updateCacheMetrics,</span> |
| <span class="source-line-no">1307</span><span id="line-1307"> expectedBlockType, expectedDataBlockEncoding);</span> |
| <span class="source-line-no">1308</span><span id="line-1308"> if (cachedBlock != null) {</span> |
| <span class="source-line-no">1309</span><span id="line-1309"> if (LOG.isTraceEnabled()) {</span> |
| <span class="source-line-no">1310</span><span id="line-1310"> LOG.trace("Block for file {} is coming from Cache {}",</span> |
| <span class="source-line-no">1311</span><span id="line-1311"> Bytes.toString(cachedBlock.getHFileContext().getTableName()), cachedBlock);</span> |
| <span class="source-line-no">1312</span><span id="line-1312"> }</span> |
| <span class="source-line-no">1313</span><span id="line-1313"> span.addEvent("block cache hit", attributes);</span> |
| <span class="source-line-no">1314</span><span id="line-1314"> assert cachedBlock.isUnpacked() : "Packed block leak.";</span> |
| <span class="source-line-no">1315</span><span id="line-1315"> if (cachedBlock.getBlockType().isData()) {</span> |
| <span class="source-line-no">1316</span><span id="line-1316"> if (updateCacheMetrics) {</span> |
| <span class="source-line-no">1317</span><span id="line-1317"> HFile.DATABLOCK_READ_COUNT.increment();</span> |
| <span class="source-line-no">1318</span><span id="line-1318"> }</span> |
| <span class="source-line-no">1319</span><span id="line-1319"> // Validate encoding type for data blocks. We include encoding</span> |
| <span class="source-line-no">1320</span><span id="line-1320"> // type in the cache key, and we expect it to match on a cache hit.</span> |
| <span class="source-line-no">1321</span><span id="line-1321"> if (cachedBlock.getDataBlockEncoding() != dataBlockEncoder.getDataBlockEncoding()) {</span> |
| <span class="source-line-no">1322</span><span id="line-1322"> // Remember to release the block when in exceptional path.</span> |
| <span class="source-line-no">1323</span><span id="line-1323"> cacheConf.getBlockCache().ifPresent(cache -> {</span> |
| <span class="source-line-no">1324</span><span id="line-1324"> returnAndEvictBlock(cache, cacheKey, cachedBlock);</span> |
| <span class="source-line-no">1325</span><span id="line-1325"> });</span> |
| <span class="source-line-no">1326</span><span id="line-1326"> throw new IOException("Cached block under key " + cacheKey + " "</span> |
| <span class="source-line-no">1327</span><span id="line-1327"> + "has wrong encoding: " + cachedBlock.getDataBlockEncoding() + " (expected: "</span> |
| <span class="source-line-no">1328</span><span id="line-1328"> + dataBlockEncoder.getDataBlockEncoding() + "), path=" + path);</span> |
| <span class="source-line-no">1329</span><span id="line-1329"> }</span> |
| <span class="source-line-no">1330</span><span id="line-1330"> }</span> |
| <span class="source-line-no">1331</span><span id="line-1331"> // Cache-hit. Return!</span> |
| <span class="source-line-no">1332</span><span id="line-1332"> return cachedBlock;</span> |
| <span class="source-line-no">1333</span><span id="line-1333"> }</span> |
| <span class="source-line-no">1334</span><span id="line-1334"></span> |
| <span class="source-line-no">1335</span><span id="line-1335"> if (!useLock && cacheBlock && cacheConf.shouldLockOnCacheMiss(expectedBlockType)) {</span> |
| <span class="source-line-no">1336</span><span id="line-1336"> // check cache again with lock</span> |
| <span class="source-line-no">1337</span><span id="line-1337"> useLock = true;</span> |
| <span class="source-line-no">1338</span><span id="line-1338"> continue;</span> |
| <span class="source-line-no">1339</span><span id="line-1339"> }</span> |
| <span class="source-line-no">1340</span><span id="line-1340"> // Carry on, please load.</span> |
| <span class="source-line-no">1341</span><span id="line-1341"> }</span> |
| <span class="source-line-no">1342</span><span id="line-1342"></span> |
| <span class="source-line-no">1343</span><span id="line-1343"> span.addEvent("block cache miss", attributes);</span> |
| <span class="source-line-no">1344</span><span id="line-1344"> // Load block from filesystem.</span> |
| <span class="source-line-no">1345</span><span id="line-1345"> HFileBlock hfileBlock = fsBlockReader.readBlockData(dataBlockOffset, onDiskBlockSize, pread,</span> |
| <span class="source-line-no">1346</span><span id="line-1346"> !isCompaction, shouldUseHeap(expectedBlockType, cacheBlock));</span> |
| <span class="source-line-no">1347</span><span id="line-1347"> try {</span> |
| <span class="source-line-no">1348</span><span id="line-1348"> validateBlockType(hfileBlock, expectedBlockType);</span> |
| <span class="source-line-no">1349</span><span id="line-1349"> } catch (IOException e) {</span> |
| <span class="source-line-no">1350</span><span id="line-1350"> hfileBlock.release();</span> |
| <span class="source-line-no">1351</span><span id="line-1351"> throw e;</span> |
| <span class="source-line-no">1352</span><span id="line-1352"> }</span> |
| <span class="source-line-no">1353</span><span id="line-1353"> BlockType.BlockCategory category = hfileBlock.getBlockType().getCategory();</span> |
| <span class="source-line-no">1354</span><span id="line-1354"> final boolean cacheCompressed = cacheConf.shouldCacheCompressed(category);</span> |
| <span class="source-line-no">1355</span><span id="line-1355"> final boolean cacheOnRead = cacheConf.shouldCacheBlockOnRead(category);</span> |
| <span class="source-line-no">1356</span><span id="line-1356"></span> |
| <span class="source-line-no">1357</span><span id="line-1357"> // Don't need the unpacked block back and we're storing the block in the cache compressed</span> |
| <span class="source-line-no">1358</span><span id="line-1358"> if (cacheOnly && cacheCompressed && cacheOnRead) {</span> |
| <span class="source-line-no">1359</span><span id="line-1359"> HFileBlock blockNoChecksum = BlockCacheUtil.getBlockForCaching(cacheConf, hfileBlock);</span> |
| <span class="source-line-no">1360</span><span id="line-1360"> cacheConf.getBlockCache().ifPresent(cache -> {</span> |
| <span class="source-line-no">1361</span><span id="line-1361"> LOG.debug("Skipping decompression of block {} in prefetch", cacheKey);</span> |
| <span class="source-line-no">1362</span><span id="line-1362"> // Cache the block if necessary</span> |
| <span class="source-line-no">1363</span><span id="line-1363"> if (cacheBlock && cacheConf.shouldCacheBlockOnRead(category)) {</span> |
| <span class="source-line-no">1364</span><span id="line-1364"> cache.cacheBlock(cacheKey, blockNoChecksum, cacheConf.isInMemory(), cacheOnly);</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> |
| <span class="source-line-no">1367</span><span id="line-1367"></span> |
| <span class="source-line-no">1368</span><span id="line-1368"> if (updateCacheMetrics && hfileBlock.getBlockType().isData()) {</span> |
| <span class="source-line-no">1369</span><span id="line-1369"> HFile.DATABLOCK_READ_COUNT.increment();</span> |
| <span class="source-line-no">1370</span><span id="line-1370"> }</span> |
| <span class="source-line-no">1371</span><span id="line-1371"> return blockNoChecksum;</span> |
| <span class="source-line-no">1372</span><span id="line-1372"> }</span> |
| <span class="source-line-no">1373</span><span id="line-1373"> HFileBlock unpacked = hfileBlock.unpack(hfileContext, fsBlockReader);</span> |
| <span class="source-line-no">1374</span><span id="line-1374"> HFileBlock unpackedNoChecksum = BlockCacheUtil.getBlockForCaching(cacheConf, unpacked);</span> |
| <span class="source-line-no">1375</span><span id="line-1375"> // Cache the block if necessary</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"> if (cacheBlock && cacheConf.shouldCacheBlockOnRead(category)) {</span> |
| <span class="source-line-no">1378</span><span id="line-1378"> // Using the wait on cache during compaction and prefetching.</span> |
| <span class="source-line-no">1379</span><span id="line-1379"> cache.cacheBlock(cacheKey,</span> |
| <span class="source-line-no">1380</span><span id="line-1380"> cacheCompressed</span> |
| <span class="source-line-no">1381</span><span id="line-1381"> ? BlockCacheUtil.getBlockForCaching(cacheConf, hfileBlock)</span> |
| <span class="source-line-no">1382</span><span id="line-1382"> : unpackedNoChecksum,</span> |
| <span class="source-line-no">1383</span><span id="line-1383"> cacheConf.isInMemory(), cacheOnly);</span> |
| <span class="source-line-no">1384</span><span id="line-1384"> }</span> |
| <span class="source-line-no">1385</span><span id="line-1385"> });</span> |
| <span class="source-line-no">1386</span><span id="line-1386"> if (unpacked != hfileBlock) {</span> |
| <span class="source-line-no">1387</span><span id="line-1387"> // End of life here if hfileBlock is an independent block.</span> |
| <span class="source-line-no">1388</span><span id="line-1388"> hfileBlock.release();</span> |
| <span class="source-line-no">1389</span><span id="line-1389"> }</span> |
| <span class="source-line-no">1390</span><span id="line-1390"> if (updateCacheMetrics && hfileBlock.getBlockType().isData()) {</span> |
| <span class="source-line-no">1391</span><span id="line-1391"> HFile.DATABLOCK_READ_COUNT.increment();</span> |
| <span class="source-line-no">1392</span><span id="line-1392"> }</span> |
| <span class="source-line-no">1393</span><span id="line-1393"></span> |
| <span class="source-line-no">1394</span><span id="line-1394"> return unpackedNoChecksum;</span> |
| <span class="source-line-no">1395</span><span id="line-1395"> }</span> |
| <span class="source-line-no">1396</span><span id="line-1396"> } finally {</span> |
| <span class="source-line-no">1397</span><span id="line-1397"> if (lockEntry != null) {</span> |
| <span class="source-line-no">1398</span><span id="line-1398"> offsetLock.releaseLockEntry(lockEntry);</span> |
| <span class="source-line-no">1399</span><span id="line-1399"> }</span> |
| <span class="source-line-no">1400</span><span id="line-1400"> }</span> |
| <span class="source-line-no">1401</span><span id="line-1401"> }</span> |
| <span class="source-line-no">1402</span><span id="line-1402"></span> |
| <span class="source-line-no">1403</span><span id="line-1403"> @Override</span> |
| <span class="source-line-no">1404</span><span id="line-1404"> public boolean hasMVCCInfo() {</span> |
| <span class="source-line-no">1405</span><span id="line-1405"> return fileInfo.shouldIncludeMemStoreTS() && fileInfo.isDecodeMemstoreTS();</span> |
| <span class="source-line-no">1406</span><span id="line-1406"> }</span> |
| <span class="source-line-no">1407</span><span id="line-1407"></span> |
| <span class="source-line-no">1408</span><span id="line-1408"> /**</span> |
| <span class="source-line-no">1409</span><span id="line-1409"> * Compares the actual type of a block retrieved from cache or disk with its expected type and</span> |
| <span class="source-line-no">1410</span><span id="line-1410"> * throws an exception in case of a mismatch. Expected block type of {@link BlockType#DATA} is</span> |
| <span class="source-line-no">1411</span><span id="line-1411"> * considered to match the actual block type [@link {@link BlockType#ENCODED_DATA} as well.</span> |
| <span class="source-line-no">1412</span><span id="line-1412"> * @param block a block retrieved from cache or disk</span> |
| <span class="source-line-no">1413</span><span id="line-1413"> * @param expectedBlockType the expected block type, or null to skip the check</span> |
| <span class="source-line-no">1414</span><span id="line-1414"> */</span> |
| <span class="source-line-no">1415</span><span id="line-1415"> private void validateBlockType(HFileBlock block, BlockType expectedBlockType) throws IOException {</span> |
| <span class="source-line-no">1416</span><span id="line-1416"> if (expectedBlockType == null) {</span> |
| <span class="source-line-no">1417</span><span id="line-1417"> return;</span> |
| <span class="source-line-no">1418</span><span id="line-1418"> }</span> |
| <span class="source-line-no">1419</span><span id="line-1419"> BlockType actualBlockType = block.getBlockType();</span> |
| <span class="source-line-no">1420</span><span id="line-1420"> if (expectedBlockType.isData() && actualBlockType.isData()) {</span> |
| <span class="source-line-no">1421</span><span id="line-1421"> // We consider DATA to match ENCODED_DATA for the purpose of this</span> |
| <span class="source-line-no">1422</span><span id="line-1422"> // verification.</span> |
| <span class="source-line-no">1423</span><span id="line-1423"> return;</span> |
| <span class="source-line-no">1424</span><span id="line-1424"> }</span> |
| <span class="source-line-no">1425</span><span id="line-1425"> if (actualBlockType != expectedBlockType) {</span> |
| <span class="source-line-no">1426</span><span id="line-1426"> throw new IOException("Expected block type " + expectedBlockType + ", " + "but got "</span> |
| <span class="source-line-no">1427</span><span id="line-1427"> + actualBlockType + ": " + block + ", path=" + path);</span> |
| <span class="source-line-no">1428</span><span id="line-1428"> }</span> |
| <span class="source-line-no">1429</span><span id="line-1429"> }</span> |
| <span class="source-line-no">1430</span><span id="line-1430"></span> |
| <span class="source-line-no">1431</span><span id="line-1431"> /**</span> |
| <span class="source-line-no">1432</span><span id="line-1432"> * @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">1433</span><span id="line-1433"> * the last row key, but it is the Cell representation of the last key</span> |
| <span class="source-line-no">1434</span><span id="line-1434"> */</span> |
| <span class="source-line-no">1435</span><span id="line-1435"> @Override</span> |
| <span class="source-line-no">1436</span><span id="line-1436"> public Optional<ExtendedCell> getLastKey() {</span> |
| <span class="source-line-no">1437</span><span id="line-1437"> return dataBlockIndexReader.isEmpty()</span> |
| <span class="source-line-no">1438</span><span id="line-1438"> ? Optional.empty()</span> |
| <span class="source-line-no">1439</span><span id="line-1439"> : Optional.of(fileInfo.getLastKeyCell());</span> |
| <span class="source-line-no">1440</span><span id="line-1440"> }</span> |
| <span class="source-line-no">1441</span><span id="line-1441"></span> |
| <span class="source-line-no">1442</span><span id="line-1442"> /**</span> |
| <span class="source-line-no">1443</span><span id="line-1443"> * @return Midkey for this file. We work with block boundaries only so returned midkey is an</span> |
| <span class="source-line-no">1444</span><span id="line-1444"> * approximation only.</span> |
| <span class="source-line-no">1445</span><span id="line-1445"> */</span> |
| <span class="source-line-no">1446</span><span id="line-1446"> @Override</span> |
| <span class="source-line-no">1447</span><span id="line-1447"> public Optional<ExtendedCell> midKey() throws IOException {</span> |
| <span class="source-line-no">1448</span><span id="line-1448"> return Optional.ofNullable(dataBlockIndexReader.midkey(this));</span> |
| <span class="source-line-no">1449</span><span id="line-1449"> }</span> |
| <span class="source-line-no">1450</span><span id="line-1450"></span> |
| <span class="source-line-no">1451</span><span id="line-1451"> @Override</span> |
| <span class="source-line-no">1452</span><span id="line-1452"> public void close() throws IOException {</span> |
| <span class="source-line-no">1453</span><span id="line-1453"> close(cacheConf.shouldEvictOnClose());</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"> @Override</span> |
| <span class="source-line-no">1457</span><span id="line-1457"> public DataBlockEncoding getEffectiveEncodingInCache(boolean isCompaction) {</span> |
| <span class="source-line-no">1458</span><span id="line-1458"> return dataBlockEncoder.getEffectiveEncodingInCache(isCompaction);</span> |
| <span class="source-line-no">1459</span><span id="line-1459"> }</span> |
| <span class="source-line-no">1460</span><span id="line-1460"></span> |
| <span class="source-line-no">1461</span><span id="line-1461"> /** For testing */</span> |
| <span class="source-line-no">1462</span><span id="line-1462"> @Override</span> |
| <span class="source-line-no">1463</span><span id="line-1463"> public HFileBlock.FSReader getUncachedBlockReader() {</span> |
| <span class="source-line-no">1464</span><span id="line-1464"> return fsBlockReader;</span> |
| <span class="source-line-no">1465</span><span id="line-1465"> }</span> |
| <span class="source-line-no">1466</span><span id="line-1466"></span> |
| <span class="source-line-no">1467</span><span id="line-1467"> /**</span> |
| <span class="source-line-no">1468</span><span id="line-1468"> * Scanner that operates on encoded data blocks.</span> |
| <span class="source-line-no">1469</span><span id="line-1469"> */</span> |
| <span class="source-line-no">1470</span><span id="line-1470"> protected static class EncodedScanner extends HFileScannerImpl {</span> |
| <span class="source-line-no">1471</span><span id="line-1471"> private final HFileBlockDecodingContext decodingCtx;</span> |
| <span class="source-line-no">1472</span><span id="line-1472"> private final DataBlockEncoder.EncodedSeeker seeker;</span> |
| <span class="source-line-no">1473</span><span id="line-1473"> private final DataBlockEncoder dataBlockEncoder;</span> |
| <span class="source-line-no">1474</span><span id="line-1474"></span> |
| <span class="source-line-no">1475</span><span id="line-1475"> public EncodedScanner(HFile.Reader reader, boolean cacheBlocks, boolean pread,</span> |
| <span class="source-line-no">1476</span><span id="line-1476"> boolean isCompaction, HFileContext meta, Configuration conf) {</span> |
| <span class="source-line-no">1477</span><span id="line-1477"> super(reader, cacheBlocks, pread, isCompaction);</span> |
| <span class="source-line-no">1478</span><span id="line-1478"> DataBlockEncoding encoding = reader.getDataBlockEncoding();</span> |
| <span class="source-line-no">1479</span><span id="line-1479"> dataBlockEncoder = encoding.getEncoder();</span> |
| <span class="source-line-no">1480</span><span id="line-1480"> decodingCtx = dataBlockEncoder.newDataBlockDecodingContext(conf, meta);</span> |
| <span class="source-line-no">1481</span><span id="line-1481"> seeker = dataBlockEncoder.createSeeker(decodingCtx);</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"> @Override</span> |
| <span class="source-line-no">1485</span><span id="line-1485"> public boolean isSeeked() {</span> |
| <span class="source-line-no">1486</span><span id="line-1486"> return curBlock != null;</span> |
| <span class="source-line-no">1487</span><span id="line-1487"> }</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 void setNonSeekedState() {</span> |
| <span class="source-line-no">1491</span><span id="line-1491"> reset();</span> |
| <span class="source-line-no">1492</span><span id="line-1492"> }</span> |
| <span class="source-line-no">1493</span><span id="line-1493"></span> |
| <span class="source-line-no">1494</span><span id="line-1494"> /**</span> |
| <span class="source-line-no">1495</span><span id="line-1495"> * Updates the current block to be the given {@link HFileBlock}. Seeks to the the first</span> |
| <span class="source-line-no">1496</span><span id="line-1496"> * key/value pair.</span> |
| <span class="source-line-no">1497</span><span id="line-1497"> * @param newBlock the block to make current, and read by {@link HFileReaderImpl#readBlock},</span> |
| <span class="source-line-no">1498</span><span id="line-1498"> * it's a totally new block with new allocated {@link ByteBuff}, so if no</span> |
| <span class="source-line-no">1499</span><span id="line-1499"> * further reference to this block, we should release it carefully.</span> |
| <span class="source-line-no">1500</span><span id="line-1500"> */</span> |
| <span class="source-line-no">1501</span><span id="line-1501"> @Override</span> |
| <span class="source-line-no">1502</span><span id="line-1502"> protected void updateCurrentBlock(HFileBlock newBlock) throws CorruptHFileException {</span> |
| <span class="source-line-no">1503</span><span id="line-1503"> try {</span> |
| <span class="source-line-no">1504</span><span id="line-1504"> // sanity checks</span> |
| <span class="source-line-no">1505</span><span id="line-1505"> if (newBlock.getBlockType() != BlockType.ENCODED_DATA) {</span> |
| <span class="source-line-no">1506</span><span id="line-1506"> throw new IllegalStateException("EncodedScanner works only on encoded data blocks");</span> |
| <span class="source-line-no">1507</span><span id="line-1507"> }</span> |
| <span class="source-line-no">1508</span><span id="line-1508"> short dataBlockEncoderId = newBlock.getDataBlockEncodingId();</span> |
| <span class="source-line-no">1509</span><span id="line-1509"> if (!DataBlockEncoding.isCorrectEncoder(dataBlockEncoder, dataBlockEncoderId)) {</span> |
| <span class="source-line-no">1510</span><span id="line-1510"> String encoderCls = dataBlockEncoder.getClass().getName();</span> |
| <span class="source-line-no">1511</span><span id="line-1511"> throw new CorruptHFileException(</span> |
| <span class="source-line-no">1512</span><span id="line-1512"> "Encoder " + encoderCls + " doesn't support data block encoding "</span> |
| <span class="source-line-no">1513</span><span id="line-1513"> + DataBlockEncoding.getNameFromId(dataBlockEncoderId) + ",path=" + reader.getPath());</span> |
| <span class="source-line-no">1514</span><span id="line-1514"> }</span> |
| <span class="source-line-no">1515</span><span id="line-1515"> updateCurrBlockRef(newBlock);</span> |
| <span class="source-line-no">1516</span><span id="line-1516"> ByteBuff encodedBuffer = getEncodedBuffer(newBlock);</span> |
| <span class="source-line-no">1517</span><span id="line-1517"> seeker.setCurrentBuffer(encodedBuffer);</span> |
| <span class="source-line-no">1518</span><span id="line-1518"> } finally {</span> |
| <span class="source-line-no">1519</span><span id="line-1519"> releaseIfNotCurBlock(newBlock);</span> |
| <span class="source-line-no">1520</span><span id="line-1520"> }</span> |
| <span class="source-line-no">1521</span><span id="line-1521"> // Reset the next indexed key</span> |
| <span class="source-line-no">1522</span><span id="line-1522"> this.nextIndexedKey = null;</span> |
| <span class="source-line-no">1523</span><span id="line-1523"> }</span> |
| <span class="source-line-no">1524</span><span id="line-1524"></span> |
| <span class="source-line-no">1525</span><span id="line-1525"> private ByteBuff getEncodedBuffer(HFileBlock newBlock) {</span> |
| <span class="source-line-no">1526</span><span id="line-1526"> ByteBuff origBlock = newBlock.getBufferReadOnly();</span> |
| <span class="source-line-no">1527</span><span id="line-1527"> int pos = newBlock.headerSize() + DataBlockEncoding.ID_SIZE;</span> |
| <span class="source-line-no">1528</span><span id="line-1528"> origBlock.position(pos);</span> |
| <span class="source-line-no">1529</span><span id="line-1529"> origBlock</span> |
| <span class="source-line-no">1530</span><span id="line-1530"> .limit(pos + newBlock.getUncompressedSizeWithoutHeader() - DataBlockEncoding.ID_SIZE);</span> |
| <span class="source-line-no">1531</span><span id="line-1531"> return origBlock.slice();</span> |
| <span class="source-line-no">1532</span><span id="line-1532"> }</span> |
| <span class="source-line-no">1533</span><span id="line-1533"></span> |
| <span class="source-line-no">1534</span><span id="line-1534"> @Override</span> |
| <span class="source-line-no">1535</span><span id="line-1535"> protected boolean processFirstDataBlock() throws IOException {</span> |
| <span class="source-line-no">1536</span><span id="line-1536"> seeker.rewind();</span> |
| <span class="source-line-no">1537</span><span id="line-1537"> return true;</span> |
| <span class="source-line-no">1538</span><span id="line-1538"> }</span> |
| <span class="source-line-no">1539</span><span id="line-1539"></span> |
| <span class="source-line-no">1540</span><span id="line-1540"> @Override</span> |
| <span class="source-line-no">1541</span><span id="line-1541"> public boolean next() throws IOException {</span> |
| <span class="source-line-no">1542</span><span id="line-1542"> boolean isValid = seeker.next();</span> |
| <span class="source-line-no">1543</span><span id="line-1543"> if (!isValid) {</span> |
| <span class="source-line-no">1544</span><span id="line-1544"> HFileBlock newBlock = readNextDataBlock();</span> |
| <span class="source-line-no">1545</span><span id="line-1545"> isValid = newBlock != null;</span> |
| <span class="source-line-no">1546</span><span id="line-1546"> if (isValid) {</span> |
| <span class="source-line-no">1547</span><span id="line-1547"> updateCurrentBlock(newBlock);</span> |
| <span class="source-line-no">1548</span><span id="line-1548"> } else {</span> |
| <span class="source-line-no">1549</span><span id="line-1549"> setNonSeekedState();</span> |
| <span class="source-line-no">1550</span><span id="line-1550"> }</span> |
| <span class="source-line-no">1551</span><span id="line-1551"> }</span> |
| <span class="source-line-no">1552</span><span id="line-1552"> return isValid;</span> |
| <span class="source-line-no">1553</span><span id="line-1553"> }</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"> public ExtendedCell getKey() {</span> |
| <span class="source-line-no">1557</span><span id="line-1557"> assertValidSeek();</span> |
| <span class="source-line-no">1558</span><span id="line-1558"> return seeker.getKey();</span> |
| <span class="source-line-no">1559</span><span id="line-1559"> }</span> |
| <span class="source-line-no">1560</span><span id="line-1560"></span> |
| <span class="source-line-no">1561</span><span id="line-1561"> @Override</span> |
| <span class="source-line-no">1562</span><span id="line-1562"> public ByteBuffer getValue() {</span> |
| <span class="source-line-no">1563</span><span id="line-1563"> assertValidSeek();</span> |
| <span class="source-line-no">1564</span><span id="line-1564"> return seeker.getValueShallowCopy();</span> |
| <span class="source-line-no">1565</span><span id="line-1565"> }</span> |
| <span class="source-line-no">1566</span><span id="line-1566"></span> |
| <span class="source-line-no">1567</span><span id="line-1567"> @Override</span> |
| <span class="source-line-no">1568</span><span id="line-1568"> public ExtendedCell getCell() {</span> |
| <span class="source-line-no">1569</span><span id="line-1569"> if (this.curBlock == null) {</span> |
| <span class="source-line-no">1570</span><span id="line-1570"> return null;</span> |
| <span class="source-line-no">1571</span><span id="line-1571"> }</span> |
| <span class="source-line-no">1572</span><span id="line-1572"> return seeker.getCell();</span> |
| <span class="source-line-no">1573</span><span id="line-1573"> }</span> |
| <span class="source-line-no">1574</span><span id="line-1574"></span> |
| <span class="source-line-no">1575</span><span id="line-1575"> private void assertValidSeek() {</span> |
| <span class="source-line-no">1576</span><span id="line-1576"> if (this.curBlock == null) {</span> |
| <span class="source-line-no">1577</span><span id="line-1577"> throw new NotSeekedException(reader.getPath());</span> |
| <span class="source-line-no">1578</span><span id="line-1578"> }</span> |
| <span class="source-line-no">1579</span><span id="line-1579"> }</span> |
| <span class="source-line-no">1580</span><span id="line-1580"></span> |
| <span class="source-line-no">1581</span><span id="line-1581"> @Override</span> |
| <span class="source-line-no">1582</span><span id="line-1582"> protected ExtendedCell getFirstKeyCellInBlock(HFileBlock curBlock) {</span> |
| <span class="source-line-no">1583</span><span id="line-1583"> return dataBlockEncoder.getFirstKeyCellInBlock(getEncodedBuffer(curBlock));</span> |
| <span class="source-line-no">1584</span><span id="line-1584"> }</span> |
| <span class="source-line-no">1585</span><span id="line-1585"></span> |
| <span class="source-line-no">1586</span><span id="line-1586"> @Override</span> |
| <span class="source-line-no">1587</span><span id="line-1587"> protected int loadBlockAndSeekToKey(HFileBlock seekToBlock, ExtendedCell nextIndexedKey,</span> |
| <span class="source-line-no">1588</span><span id="line-1588"> boolean rewind, ExtendedCell key, boolean seekBefore) throws IOException {</span> |
| <span class="source-line-no">1589</span><span id="line-1589"> if (this.curBlock == null || this.curBlock.getOffset() != seekToBlock.getOffset()) {</span> |
| <span class="source-line-no">1590</span><span id="line-1590"> updateCurrentBlock(seekToBlock);</span> |
| <span class="source-line-no">1591</span><span id="line-1591"> } else if (rewind) {</span> |
| <span class="source-line-no">1592</span><span id="line-1592"> seeker.rewind();</span> |
| <span class="source-line-no">1593</span><span id="line-1593"> }</span> |
| <span class="source-line-no">1594</span><span id="line-1594"> this.nextIndexedKey = nextIndexedKey;</span> |
| <span class="source-line-no">1595</span><span id="line-1595"> return seeker.seekToKeyInBlock(key, seekBefore);</span> |
| <span class="source-line-no">1596</span><span id="line-1596"> }</span> |
| <span class="source-line-no">1597</span><span id="line-1597"></span> |
| <span class="source-line-no">1598</span><span id="line-1598"> @Override</span> |
| <span class="source-line-no">1599</span><span id="line-1599"> public int compareKey(CellComparator comparator, ExtendedCell key) {</span> |
| <span class="source-line-no">1600</span><span id="line-1600"> return seeker.compareKey(comparator, key);</span> |
| <span class="source-line-no">1601</span><span id="line-1601"> }</span> |
| <span class="source-line-no">1602</span><span id="line-1602"> }</span> |
| <span class="source-line-no">1603</span><span id="line-1603"></span> |
| <span class="source-line-no">1604</span><span id="line-1604"> /**</span> |
| <span class="source-line-no">1605</span><span id="line-1605"> * Returns a buffer with the Bloom filter metadata. The caller takes ownership of the buffer.</span> |
| <span class="source-line-no">1606</span><span id="line-1606"> */</span> |
| <span class="source-line-no">1607</span><span id="line-1607"> @Override</span> |
| <span class="source-line-no">1608</span><span id="line-1608"> public DataInput getGeneralBloomFilterMetadata() throws IOException {</span> |
| <span class="source-line-no">1609</span><span id="line-1609"> return this.getBloomFilterMetadata(BlockType.GENERAL_BLOOM_META);</span> |
| <span class="source-line-no">1610</span><span id="line-1610"> }</span> |
| <span class="source-line-no">1611</span><span id="line-1611"></span> |
| <span class="source-line-no">1612</span><span id="line-1612"> @Override</span> |
| <span class="source-line-no">1613</span><span id="line-1613"> public DataInput getDeleteBloomFilterMetadata() throws IOException {</span> |
| <span class="source-line-no">1614</span><span id="line-1614"> return this.getBloomFilterMetadata(BlockType.DELETE_FAMILY_BLOOM_META);</span> |
| <span class="source-line-no">1615</span><span id="line-1615"> }</span> |
| <span class="source-line-no">1616</span><span id="line-1616"></span> |
| <span class="source-line-no">1617</span><span id="line-1617"> private DataInput getBloomFilterMetadata(BlockType blockType) throws IOException {</span> |
| <span class="source-line-no">1618</span><span id="line-1618"> if (</span> |
| <span class="source-line-no">1619</span><span id="line-1619"> blockType != BlockType.GENERAL_BLOOM_META && blockType != BlockType.DELETE_FAMILY_BLOOM_META</span> |
| <span class="source-line-no">1620</span><span id="line-1620"> ) {</span> |
| <span class="source-line-no">1621</span><span id="line-1621"> throw new RuntimeException(</span> |
| <span class="source-line-no">1622</span><span id="line-1622"> "Block Type: " + blockType.toString() + " is not supported, path=" + path);</span> |
| <span class="source-line-no">1623</span><span id="line-1623"> }</span> |
| <span class="source-line-no">1624</span><span id="line-1624"></span> |
| <span class="source-line-no">1625</span><span id="line-1625"> for (HFileBlock b : fileInfo.getLoadOnOpenBlocks()) {</span> |
| <span class="source-line-no">1626</span><span id="line-1626"> if (b.getBlockType() == blockType) {</span> |
| <span class="source-line-no">1627</span><span id="line-1627"> return b.getByteStream();</span> |
| <span class="source-line-no">1628</span><span id="line-1628"> }</span> |
| <span class="source-line-no">1629</span><span id="line-1629"> }</span> |
| <span class="source-line-no">1630</span><span id="line-1630"> return null;</span> |
| <span class="source-line-no">1631</span><span id="line-1631"> }</span> |
| <span class="source-line-no">1632</span><span id="line-1632"></span> |
| <span class="source-line-no">1633</span><span id="line-1633"> public boolean isFileInfoLoaded() {</span> |
| <span class="source-line-no">1634</span><span id="line-1634"> return true; // We load file info in constructor in version 2.</span> |
| <span class="source-line-no">1635</span><span id="line-1635"> }</span> |
| <span class="source-line-no">1636</span><span id="line-1636"></span> |
| <span class="source-line-no">1637</span><span id="line-1637"> @Override</span> |
| <span class="source-line-no">1638</span><span id="line-1638"> public HFileContext getFileContext() {</span> |
| <span class="source-line-no">1639</span><span id="line-1639"> return hfileContext;</span> |
| <span class="source-line-no">1640</span><span id="line-1640"> }</span> |
| <span class="source-line-no">1641</span><span id="line-1641"></span> |
| <span class="source-line-no">1642</span><span id="line-1642"> /**</span> |
| <span class="source-line-no">1643</span><span id="line-1643"> * Returns false if block prefetching was requested for this file and has not completed, true</span> |
| <span class="source-line-no">1644</span><span id="line-1644"> * otherwise</span> |
| <span class="source-line-no">1645</span><span id="line-1645"> */</span> |
| <span class="source-line-no">1646</span><span id="line-1646"> @Override</span> |
| <span class="source-line-no">1647</span><span id="line-1647"> public boolean prefetchComplete() {</span> |
| <span class="source-line-no">1648</span><span id="line-1648"> return PrefetchExecutor.isCompleted(path);</span> |
| <span class="source-line-no">1649</span><span id="line-1649"> }</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"> * Returns true if block prefetching was started after waiting for specified delay, false</span> |
| <span class="source-line-no">1653</span><span id="line-1653"> * otherwise</span> |
| <span class="source-line-no">1654</span><span id="line-1654"> */</span> |
| <span class="source-line-no">1655</span><span id="line-1655"> @Override</span> |
| <span class="source-line-no">1656</span><span id="line-1656"> public boolean prefetchStarted() {</span> |
| <span class="source-line-no">1657</span><span id="line-1657"> return PrefetchExecutor.isPrefetchStarted();</span> |
| <span class="source-line-no">1658</span><span id="line-1658"> }</span> |
| <span class="source-line-no">1659</span><span id="line-1659"></span> |
| <span class="source-line-no">1660</span><span id="line-1660"> /**</span> |
| <span class="source-line-no">1661</span><span id="line-1661"> * Create a Scanner on this file. No seeks or reads are done on creation. Call</span> |
| <span class="source-line-no">1662</span><span id="line-1662"> * {@link HFileScanner#seekTo(ExtendedCell)} to position an start the read. There is nothing to</span> |
| <span class="source-line-no">1663</span><span id="line-1663"> * clean up in a Scanner. Letting go of your references to the scanner is sufficient. NOTE: Do not</span> |
| <span class="source-line-no">1664</span><span id="line-1664"> * use this overload of getScanner for compactions. See</span> |
| <span class="source-line-no">1665</span><span id="line-1665"> * {@link #getScanner(Configuration, boolean, boolean, boolean)}</span> |
| <span class="source-line-no">1666</span><span id="line-1666"> * @param conf Store configuration.</span> |
| <span class="source-line-no">1667</span><span id="line-1667"> * @param cacheBlocks True if we should cache blocks read in by this scanner.</span> |
| <span class="source-line-no">1668</span><span id="line-1668"> * @param pread Use positional read rather than seek+read if true (pread is better for</span> |
| <span class="source-line-no">1669</span><span id="line-1669"> * random reads, seek+read is better scanning).</span> |
| <span class="source-line-no">1670</span><span id="line-1670"> * @return Scanner on this file.</span> |
| <span class="source-line-no">1671</span><span id="line-1671"> */</span> |
| <span class="source-line-no">1672</span><span id="line-1672"> @Override</span> |
| <span class="source-line-no">1673</span><span id="line-1673"> public HFileScanner getScanner(Configuration conf, boolean cacheBlocks, final boolean pread) {</span> |
| <span class="source-line-no">1674</span><span id="line-1674"> return getScanner(conf, cacheBlocks, pread, false);</span> |
| <span class="source-line-no">1675</span><span id="line-1675"> }</span> |
| <span class="source-line-no">1676</span><span id="line-1676"></span> |
| <span class="source-line-no">1677</span><span id="line-1677"> /**</span> |
| <span class="source-line-no">1678</span><span id="line-1678"> * Create a Scanner on this file. No seeks or reads are done on creation. Call</span> |
| <span class="source-line-no">1679</span><span id="line-1679"> * {@link HFileScanner#seekTo(ExtendedCell)} to position an start the read. There is nothing to</span> |
| <span class="source-line-no">1680</span><span id="line-1680"> * clean up in a Scanner. Letting go of your references to the scanner is sufficient.</span> |
| <span class="source-line-no">1681</span><span id="line-1681"> * @param conf Store configuration.</span> |
| <span class="source-line-no">1682</span><span id="line-1682"> * @param cacheBlocks True if we should cache blocks read in by this scanner.</span> |
| <span class="source-line-no">1683</span><span id="line-1683"> * @param pread Use positional read rather than seek+read if true (pread is better for</span> |
| <span class="source-line-no">1684</span><span id="line-1684"> * random reads, seek+read is better scanning).</span> |
| <span class="source-line-no">1685</span><span id="line-1685"> * @param isCompaction is scanner being used for a compaction?</span> |
| <span class="source-line-no">1686</span><span id="line-1686"> * @return Scanner on this file.</span> |
| <span class="source-line-no">1687</span><span id="line-1687"> */</span> |
| <span class="source-line-no">1688</span><span id="line-1688"> @Override</span> |
| <span class="source-line-no">1689</span><span id="line-1689"> public HFileScanner getScanner(Configuration conf, boolean cacheBlocks, final boolean pread,</span> |
| <span class="source-line-no">1690</span><span id="line-1690"> final boolean isCompaction) {</span> |
| <span class="source-line-no">1691</span><span id="line-1691"> if (dataBlockEncoder.useEncodedScanner()) {</span> |
| <span class="source-line-no">1692</span><span id="line-1692"> return new EncodedScanner(this, cacheBlocks, pread, isCompaction, this.hfileContext, conf);</span> |
| <span class="source-line-no">1693</span><span id="line-1693"> }</span> |
| <span class="source-line-no">1694</span><span id="line-1694"> return new HFileScannerImpl(this, cacheBlocks, pread, isCompaction);</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"> public int getMajorVersion() {</span> |
| <span class="source-line-no">1698</span><span id="line-1698"> return 3;</span> |
| <span class="source-line-no">1699</span><span id="line-1699"> }</span> |
| <span class="source-line-no">1700</span><span id="line-1700"></span> |
| <span class="source-line-no">1701</span><span id="line-1701"> @Override</span> |
| <span class="source-line-no">1702</span><span id="line-1702"> public void unbufferStream() {</span> |
| <span class="source-line-no">1703</span><span id="line-1703"> fsBlockReader.unbufferStream();</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> |
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| </div> |
| </main> |
| </body> |
| </html> |
