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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;</span> |
| <span class="source-line-no">019</span><span id="line-19"></span> |
| <span class="source-line-no">020</span><span id="line-20">import java.io.IOException;</span> |
| <span class="source-line-no">021</span><span id="line-21">import java.nio.ByteBuffer;</span> |
| <span class="source-line-no">022</span><span id="line-22">import java.util.Optional;</span> |
| <span class="source-line-no">023</span><span id="line-23">import java.util.concurrent.atomic.AtomicBoolean;</span> |
| <span class="source-line-no">024</span><span id="line-24">import java.util.function.IntConsumer;</span> |
| <span class="source-line-no">025</span><span id="line-25">import org.apache.hadoop.conf.Configuration;</span> |
| <span class="source-line-no">026</span><span id="line-26">import org.apache.hadoop.hbase.ExtendedCell;</span> |
| <span class="source-line-no">027</span><span id="line-27">import org.apache.hadoop.hbase.HConstants;</span> |
| <span class="source-line-no">028</span><span id="line-28">import org.apache.hadoop.hbase.KeyValue;</span> |
| <span class="source-line-no">029</span><span id="line-29">import org.apache.hadoop.hbase.PrivateCellUtil;</span> |
| <span class="source-line-no">030</span><span id="line-30">import org.apache.hadoop.hbase.client.Scan;</span> |
| <span class="source-line-no">031</span><span id="line-31">import org.apache.hadoop.hbase.io.hfile.CacheConfig;</span> |
| <span class="source-line-no">032</span><span id="line-32">import org.apache.hadoop.hbase.io.hfile.HFileInfo;</span> |
| <span class="source-line-no">033</span><span id="line-33">import org.apache.hadoop.hbase.io.hfile.HFileReaderImpl;</span> |
| <span class="source-line-no">034</span><span id="line-34">import org.apache.hadoop.hbase.io.hfile.HFileScanner;</span> |
| <span class="source-line-no">035</span><span id="line-35">import org.apache.hadoop.hbase.io.hfile.ReaderContext;</span> |
| <span class="source-line-no">036</span><span id="line-36">import org.apache.hadoop.hbase.regionserver.StoreFileInfo;</span> |
| <span class="source-line-no">037</span><span id="line-37">import org.apache.hadoop.hbase.regionserver.StoreFileReader;</span> |
| <span class="source-line-no">038</span><span id="line-38">import org.apache.hadoop.hbase.util.Bytes;</span> |
| <span class="source-line-no">039</span><span id="line-39">import org.apache.yetus.audience.InterfaceAudience;</span> |
| <span class="source-line-no">040</span><span id="line-40">import org.slf4j.Logger;</span> |
| <span class="source-line-no">041</span><span id="line-41">import org.slf4j.LoggerFactory;</span> |
| <span class="source-line-no">042</span><span id="line-42"></span> |
| <span class="source-line-no">043</span><span id="line-43">/**</span> |
| <span class="source-line-no">044</span><span id="line-44"> * A facade for a {@link org.apache.hadoop.hbase.io.hfile.HFile.Reader} that serves up either the</span> |
| <span class="source-line-no">045</span><span id="line-45"> * top or bottom half of a HFile where 'bottom' is the first half of the file containing the keys</span> |
| <span class="source-line-no">046</span><span id="line-46"> * that sort lowest and 'top' is the second half of the file with keys that sort greater than those</span> |
| <span class="source-line-no">047</span><span id="line-47"> * of the bottom half. The top includes the split files midkey, of the key that follows if it does</span> |
| <span class="source-line-no">048</span><span id="line-48"> * not exist in the file.</span> |
| <span class="source-line-no">049</span><span id="line-49"> * <p></span> |
| <span class="source-line-no">050</span><span id="line-50"> * This type works in tandem with the {@link Reference} type. This class is used reading while</span> |
| <span class="source-line-no">051</span><span id="line-51"> * Reference is used writing.</span> |
| <span class="source-line-no">052</span><span id="line-52"> * <p></span> |
| <span class="source-line-no">053</span><span id="line-53"> * This file is not splitable. Calls to {@link #midKey()} return null.</span> |
| <span class="source-line-no">054</span><span id="line-54"> */</span> |
| <span class="source-line-no">055</span><span id="line-55">@InterfaceAudience.Private</span> |
| <span class="source-line-no">056</span><span id="line-56">public class HalfStoreFileReader extends StoreFileReader {</span> |
| <span class="source-line-no">057</span><span id="line-57"> private static final Logger LOG = LoggerFactory.getLogger(HalfStoreFileReader.class);</span> |
| <span class="source-line-no">058</span><span id="line-58"> final boolean top;</span> |
| <span class="source-line-no">059</span><span id="line-59"> // This is the key we split around. Its the first possible entry on a row:</span> |
| <span class="source-line-no">060</span><span id="line-60"> // i.e. empty column and a timestamp of LATEST_TIMESTAMP.</span> |
| <span class="source-line-no">061</span><span id="line-61"> protected final byte[] splitkey;</span> |
| <span class="source-line-no">062</span><span id="line-62"></span> |
| <span class="source-line-no">063</span><span id="line-63"> private final ExtendedCell splitCell;</span> |
| <span class="source-line-no">064</span><span id="line-64"></span> |
| <span class="source-line-no">065</span><span id="line-65"> private Optional<ExtendedCell> firstKey = Optional.empty();</span> |
| <span class="source-line-no">066</span><span id="line-66"></span> |
| <span class="source-line-no">067</span><span id="line-67"> private boolean firstKeySeeked = false;</span> |
| <span class="source-line-no">068</span><span id="line-68"></span> |
| <span class="source-line-no">069</span><span id="line-69"> private AtomicBoolean closed = new AtomicBoolean(false);</span> |
| <span class="source-line-no">070</span><span id="line-70"></span> |
| <span class="source-line-no">071</span><span id="line-71"> /**</span> |
| <span class="source-line-no">072</span><span id="line-72"> * Creates a half file reader for a hfile referred to by an hfilelink.</span> |
| <span class="source-line-no">073</span><span id="line-73"> * @param context Reader context info</span> |
| <span class="source-line-no">074</span><span id="line-74"> * @param fileInfo HFile info</span> |
| <span class="source-line-no">075</span><span id="line-75"> * @param cacheConf CacheConfig</span> |
| <span class="source-line-no">076</span><span id="line-76"> * @param r original reference file (contains top or bottom)</span> |
| <span class="source-line-no">077</span><span id="line-77"> * @param conf Configuration</span> |
| <span class="source-line-no">078</span><span id="line-78"> */</span> |
| <span class="source-line-no">079</span><span id="line-79"> public HalfStoreFileReader(final ReaderContext context, final HFileInfo fileInfo,</span> |
| <span class="source-line-no">080</span><span id="line-80"> final CacheConfig cacheConf, final Reference r, StoreFileInfo storeFileInfo,</span> |
| <span class="source-line-no">081</span><span id="line-81"> final Configuration conf) throws IOException {</span> |
| <span class="source-line-no">082</span><span id="line-82"> super(context, fileInfo, cacheConf, storeFileInfo, conf);</span> |
| <span class="source-line-no">083</span><span id="line-83"> // This is not actual midkey for this half-file; its just border</span> |
| <span class="source-line-no">084</span><span id="line-84"> // around which we split top and bottom. Have to look in files to find</span> |
| <span class="source-line-no">085</span><span id="line-85"> // actual last and first keys for bottom and top halves. Half-files don't</span> |
| <span class="source-line-no">086</span><span id="line-86"> // have an actual midkey themselves. No midkey is how we indicate file is</span> |
| <span class="source-line-no">087</span><span id="line-87"> // not splittable.</span> |
| <span class="source-line-no">088</span><span id="line-88"> this.splitkey = r.getSplitKey();</span> |
| <span class="source-line-no">089</span><span id="line-89"> this.splitCell = new KeyValue.KeyOnlyKeyValue(this.splitkey, 0, this.splitkey.length);</span> |
| <span class="source-line-no">090</span><span id="line-90"> // Is it top or bottom half?</span> |
| <span class="source-line-no">091</span><span id="line-91"> this.top = Reference.isTopFileRegion(r.getFileRegion());</span> |
| <span class="source-line-no">092</span><span id="line-92"> }</span> |
| <span class="source-line-no">093</span><span id="line-93"></span> |
| <span class="source-line-no">094</span><span id="line-94"> protected boolean isTop() {</span> |
| <span class="source-line-no">095</span><span id="line-95"> return this.top;</span> |
| <span class="source-line-no">096</span><span id="line-96"> }</span> |
| <span class="source-line-no">097</span><span id="line-97"></span> |
| <span class="source-line-no">098</span><span id="line-98"> @Override</span> |
| <span class="source-line-no">099</span><span id="line-99"> protected HFileScanner getScanner(final boolean cacheBlocks, final boolean pread,</span> |
| <span class="source-line-no">100</span><span id="line-100"> final boolean isCompaction) {</span> |
| <span class="source-line-no">101</span><span id="line-101"> final HFileScanner s = super.getScanner(cacheBlocks, pread, isCompaction);</span> |
| <span class="source-line-no">102</span><span id="line-102"> return new HFileScanner() {</span> |
| <span class="source-line-no">103</span><span id="line-103"> final HFileScanner delegate = s;</span> |
| <span class="source-line-no">104</span><span id="line-104"> public boolean atEnd = false;</span> |
| <span class="source-line-no">105</span><span id="line-105"></span> |
| <span class="source-line-no">106</span><span id="line-106"> @Override</span> |
| <span class="source-line-no">107</span><span id="line-107"> public ExtendedCell getKey() {</span> |
| <span class="source-line-no">108</span><span id="line-108"> if (atEnd) {</span> |
| <span class="source-line-no">109</span><span id="line-109"> return null;</span> |
| <span class="source-line-no">110</span><span id="line-110"> }</span> |
| <span class="source-line-no">111</span><span id="line-111"> return delegate.getKey();</span> |
| <span class="source-line-no">112</span><span id="line-112"> }</span> |
| <span class="source-line-no">113</span><span id="line-113"></span> |
| <span class="source-line-no">114</span><span id="line-114"> @Override</span> |
| <span class="source-line-no">115</span><span id="line-115"> public ByteBuffer getValue() {</span> |
| <span class="source-line-no">116</span><span id="line-116"> if (atEnd) {</span> |
| <span class="source-line-no">117</span><span id="line-117"> return null;</span> |
| <span class="source-line-no">118</span><span id="line-118"> }</span> |
| <span class="source-line-no">119</span><span id="line-119"></span> |
| <span class="source-line-no">120</span><span id="line-120"> return delegate.getValue();</span> |
| <span class="source-line-no">121</span><span id="line-121"> }</span> |
| <span class="source-line-no">122</span><span id="line-122"></span> |
| <span class="source-line-no">123</span><span id="line-123"> @Override</span> |
| <span class="source-line-no">124</span><span id="line-124"> public ExtendedCell getCell() {</span> |
| <span class="source-line-no">125</span><span id="line-125"> if (atEnd) {</span> |
| <span class="source-line-no">126</span><span id="line-126"> return null;</span> |
| <span class="source-line-no">127</span><span id="line-127"> }</span> |
| <span class="source-line-no">128</span><span id="line-128"></span> |
| <span class="source-line-no">129</span><span id="line-129"> return delegate.getCell();</span> |
| <span class="source-line-no">130</span><span id="line-130"> }</span> |
| <span class="source-line-no">131</span><span id="line-131"></span> |
| <span class="source-line-no">132</span><span id="line-132"> @Override</span> |
| <span class="source-line-no">133</span><span id="line-133"> public boolean next() throws IOException {</span> |
| <span class="source-line-no">134</span><span id="line-134"> if (atEnd) return false;</span> |
| <span class="source-line-no">135</span><span id="line-135"></span> |
| <span class="source-line-no">136</span><span id="line-136"> boolean b = delegate.next();</span> |
| <span class="source-line-no">137</span><span id="line-137"> if (!b) {</span> |
| <span class="source-line-no">138</span><span id="line-138"> return b;</span> |
| <span class="source-line-no">139</span><span id="line-139"> }</span> |
| <span class="source-line-no">140</span><span id="line-140"> // constrain the bottom.</span> |
| <span class="source-line-no">141</span><span id="line-141"> if (!top) {</span> |
| <span class="source-line-no">142</span><span id="line-142"> if (getComparator().compare(splitCell, getKey()) <= 0) {</span> |
| <span class="source-line-no">143</span><span id="line-143"> atEnd = true;</span> |
| <span class="source-line-no">144</span><span id="line-144"> return false;</span> |
| <span class="source-line-no">145</span><span id="line-145"> }</span> |
| <span class="source-line-no">146</span><span id="line-146"> }</span> |
| <span class="source-line-no">147</span><span id="line-147"> return true;</span> |
| <span class="source-line-no">148</span><span id="line-148"> }</span> |
| <span class="source-line-no">149</span><span id="line-149"></span> |
| <span class="source-line-no">150</span><span id="line-150"> @Override</span> |
| <span class="source-line-no">151</span><span id="line-151"> public boolean seekTo() throws IOException {</span> |
| <span class="source-line-no">152</span><span id="line-152"> if (top) {</span> |
| <span class="source-line-no">153</span><span id="line-153"> int r = this.delegate.seekTo(splitCell);</span> |
| <span class="source-line-no">154</span><span id="line-154"> if (r == HConstants.INDEX_KEY_MAGIC) {</span> |
| <span class="source-line-no">155</span><span id="line-155"> return true;</span> |
| <span class="source-line-no">156</span><span id="line-156"> }</span> |
| <span class="source-line-no">157</span><span id="line-157"> if (r < 0) {</span> |
| <span class="source-line-no">158</span><span id="line-158"> // midkey is < first key in file</span> |
| <span class="source-line-no">159</span><span id="line-159"> return this.delegate.seekTo();</span> |
| <span class="source-line-no">160</span><span id="line-160"> }</span> |
| <span class="source-line-no">161</span><span id="line-161"> if (r > 0) {</span> |
| <span class="source-line-no">162</span><span id="line-162"> return this.delegate.next();</span> |
| <span class="source-line-no">163</span><span id="line-163"> }</span> |
| <span class="source-line-no">164</span><span id="line-164"> return true;</span> |
| <span class="source-line-no">165</span><span id="line-165"> }</span> |
| <span class="source-line-no">166</span><span id="line-166"></span> |
| <span class="source-line-no">167</span><span id="line-167"> boolean b = delegate.seekTo();</span> |
| <span class="source-line-no">168</span><span id="line-168"> if (!b) {</span> |
| <span class="source-line-no">169</span><span id="line-169"> return b;</span> |
| <span class="source-line-no">170</span><span id="line-170"> }</span> |
| <span class="source-line-no">171</span><span id="line-171"> // Check key.</span> |
| <span class="source-line-no">172</span><span id="line-172"> return (this.delegate.getReader().getComparator().compare(splitCell, getKey())) > 0;</span> |
| <span class="source-line-no">173</span><span id="line-173"> }</span> |
| <span class="source-line-no">174</span><span id="line-174"></span> |
| <span class="source-line-no">175</span><span id="line-175"> @Override</span> |
| <span class="source-line-no">176</span><span id="line-176"> public org.apache.hadoop.hbase.io.hfile.HFile.Reader getReader() {</span> |
| <span class="source-line-no">177</span><span id="line-177"> return this.delegate.getReader();</span> |
| <span class="source-line-no">178</span><span id="line-178"> }</span> |
| <span class="source-line-no">179</span><span id="line-179"></span> |
| <span class="source-line-no">180</span><span id="line-180"> @Override</span> |
| <span class="source-line-no">181</span><span id="line-181"> public boolean isSeeked() {</span> |
| <span class="source-line-no">182</span><span id="line-182"> return this.delegate.isSeeked();</span> |
| <span class="source-line-no">183</span><span id="line-183"> }</span> |
| <span class="source-line-no">184</span><span id="line-184"></span> |
| <span class="source-line-no">185</span><span id="line-185"> @Override</span> |
| <span class="source-line-no">186</span><span id="line-186"> public int seekTo(ExtendedCell key) throws IOException {</span> |
| <span class="source-line-no">187</span><span id="line-187"> if (top) {</span> |
| <span class="source-line-no">188</span><span id="line-188"> if (PrivateCellUtil.compareKeyIgnoresMvcc(getComparator(), key, splitCell) < 0) {</span> |
| <span class="source-line-no">189</span><span id="line-189"> return -1;</span> |
| <span class="source-line-no">190</span><span id="line-190"> }</span> |
| <span class="source-line-no">191</span><span id="line-191"> } else {</span> |
| <span class="source-line-no">192</span><span id="line-192"> if (PrivateCellUtil.compareKeyIgnoresMvcc(getComparator(), key, splitCell) >= 0) {</span> |
| <span class="source-line-no">193</span><span id="line-193"> // we would place the scanner in the second half.</span> |
| <span class="source-line-no">194</span><span id="line-194"> // it might be an error to return false here ever...</span> |
| <span class="source-line-no">195</span><span id="line-195"> boolean res = delegate.seekBefore(splitCell);</span> |
| <span class="source-line-no">196</span><span id="line-196"> if (!res) {</span> |
| <span class="source-line-no">197</span><span id="line-197"> throw new IOException(</span> |
| <span class="source-line-no">198</span><span id="line-198"> "Seeking for a key in bottom of file, but key exists in top of file, "</span> |
| <span class="source-line-no">199</span><span id="line-199"> + "failed on seekBefore(midkey)");</span> |
| <span class="source-line-no">200</span><span id="line-200"> }</span> |
| <span class="source-line-no">201</span><span id="line-201"> return 1;</span> |
| <span class="source-line-no">202</span><span id="line-202"> }</span> |
| <span class="source-line-no">203</span><span id="line-203"> }</span> |
| <span class="source-line-no">204</span><span id="line-204"> return delegate.seekTo(key);</span> |
| <span class="source-line-no">205</span><span id="line-205"> }</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 int reseekTo(ExtendedCell key) throws IOException {</span> |
| <span class="source-line-no">209</span><span id="line-209"> // This function is identical to the corresponding seekTo function</span> |
| <span class="source-line-no">210</span><span id="line-210"> // except that we call reseekTo (and not seekTo) on the delegate.</span> |
| <span class="source-line-no">211</span><span id="line-211"> if (top) {</span> |
| <span class="source-line-no">212</span><span id="line-212"> if (PrivateCellUtil.compareKeyIgnoresMvcc(getComparator(), key, splitCell) < 0) {</span> |
| <span class="source-line-no">213</span><span id="line-213"> return -1;</span> |
| <span class="source-line-no">214</span><span id="line-214"> }</span> |
| <span class="source-line-no">215</span><span id="line-215"> } else {</span> |
| <span class="source-line-no">216</span><span id="line-216"> if (PrivateCellUtil.compareKeyIgnoresMvcc(getComparator(), key, splitCell) >= 0) {</span> |
| <span class="source-line-no">217</span><span id="line-217"> // we would place the scanner in the second half.</span> |
| <span class="source-line-no">218</span><span id="line-218"> // it might be an error to return false here ever...</span> |
| <span class="source-line-no">219</span><span id="line-219"> boolean res = delegate.seekBefore(splitCell);</span> |
| <span class="source-line-no">220</span><span id="line-220"> if (!res) {</span> |
| <span class="source-line-no">221</span><span id="line-221"> throw new IOException("Seeking for a key in bottom of file, but"</span> |
| <span class="source-line-no">222</span><span id="line-222"> + " key exists in top of file, failed on seekBefore(midkey)");</span> |
| <span class="source-line-no">223</span><span id="line-223"> }</span> |
| <span class="source-line-no">224</span><span id="line-224"> return 1;</span> |
| <span class="source-line-no">225</span><span id="line-225"> }</span> |
| <span class="source-line-no">226</span><span id="line-226"> }</span> |
| <span class="source-line-no">227</span><span id="line-227"> if (atEnd) {</span> |
| <span class="source-line-no">228</span><span id="line-228"> // skip the 'reseek' and just return 1.</span> |
| <span class="source-line-no">229</span><span id="line-229"> return 1;</span> |
| <span class="source-line-no">230</span><span id="line-230"> }</span> |
| <span class="source-line-no">231</span><span id="line-231"> return delegate.reseekTo(key);</span> |
| <span class="source-line-no">232</span><span id="line-232"> }</span> |
| <span class="source-line-no">233</span><span id="line-233"></span> |
| <span class="source-line-no">234</span><span id="line-234"> @Override</span> |
| <span class="source-line-no">235</span><span id="line-235"> public boolean seekBefore(ExtendedCell key) throws IOException {</span> |
| <span class="source-line-no">236</span><span id="line-236"> if (top) {</span> |
| <span class="source-line-no">237</span><span id="line-237"> Optional<ExtendedCell> fk = getFirstKey();</span> |
| <span class="source-line-no">238</span><span id="line-238"> if (</span> |
| <span class="source-line-no">239</span><span id="line-239"> fk.isPresent()</span> |
| <span class="source-line-no">240</span><span id="line-240"> && PrivateCellUtil.compareKeyIgnoresMvcc(getComparator(), key, fk.get()) <= 0</span> |
| <span class="source-line-no">241</span><span id="line-241"> ) {</span> |
| <span class="source-line-no">242</span><span id="line-242"> return false;</span> |
| <span class="source-line-no">243</span><span id="line-243"> }</span> |
| <span class="source-line-no">244</span><span id="line-244"> } else {</span> |
| <span class="source-line-no">245</span><span id="line-245"> // The equals sign isn't strictly necessary just here to be consistent</span> |
| <span class="source-line-no">246</span><span id="line-246"> // with seekTo</span> |
| <span class="source-line-no">247</span><span id="line-247"> if (PrivateCellUtil.compareKeyIgnoresMvcc(getComparator(), key, splitCell) >= 0) {</span> |
| <span class="source-line-no">248</span><span id="line-248"> boolean ret = this.delegate.seekBefore(splitCell);</span> |
| <span class="source-line-no">249</span><span id="line-249"> if (ret) {</span> |
| <span class="source-line-no">250</span><span id="line-250"> atEnd = false;</span> |
| <span class="source-line-no">251</span><span id="line-251"> }</span> |
| <span class="source-line-no">252</span><span id="line-252"> return ret;</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"> boolean ret = this.delegate.seekBefore(key);</span> |
| <span class="source-line-no">256</span><span id="line-256"> if (ret) {</span> |
| <span class="source-line-no">257</span><span id="line-257"> atEnd = false;</span> |
| <span class="source-line-no">258</span><span id="line-258"> }</span> |
| <span class="source-line-no">259</span><span id="line-259"> return ret;</span> |
| <span class="source-line-no">260</span><span id="line-260"> }</span> |
| <span class="source-line-no">261</span><span id="line-261"></span> |
| <span class="source-line-no">262</span><span id="line-262"> @Override</span> |
| <span class="source-line-no">263</span><span id="line-263"> public ExtendedCell getNextIndexedKey() {</span> |
| <span class="source-line-no">264</span><span id="line-264"> return null;</span> |
| <span class="source-line-no">265</span><span id="line-265"> }</span> |
| <span class="source-line-no">266</span><span id="line-266"></span> |
| <span class="source-line-no">267</span><span id="line-267"> @Override</span> |
| <span class="source-line-no">268</span><span id="line-268"> public void close() {</span> |
| <span class="source-line-no">269</span><span id="line-269"> this.delegate.close();</span> |
| <span class="source-line-no">270</span><span id="line-270"> }</span> |
| <span class="source-line-no">271</span><span id="line-271"></span> |
| <span class="source-line-no">272</span><span id="line-272"> @Override</span> |
| <span class="source-line-no">273</span><span id="line-273"> public void shipped() throws IOException {</span> |
| <span class="source-line-no">274</span><span id="line-274"> this.delegate.shipped();</span> |
| <span class="source-line-no">275</span><span id="line-275"> }</span> |
| <span class="source-line-no">276</span><span id="line-276"></span> |
| <span class="source-line-no">277</span><span id="line-277"> @Override</span> |
| <span class="source-line-no">278</span><span id="line-278"> public void recordBlockSize(IntConsumer blockSizeConsumer) {</span> |
| <span class="source-line-no">279</span><span id="line-279"> this.delegate.recordBlockSize(blockSizeConsumer);</span> |
| <span class="source-line-no">280</span><span id="line-280"> }</span> |
| <span class="source-line-no">281</span><span id="line-281"> };</span> |
| <span class="source-line-no">282</span><span id="line-282"> }</span> |
| <span class="source-line-no">283</span><span id="line-283"></span> |
| <span class="source-line-no">284</span><span id="line-284"> @Override</span> |
| <span class="source-line-no">285</span><span id="line-285"> public boolean passesKeyRangeFilter(Scan scan) {</span> |
| <span class="source-line-no">286</span><span id="line-286"> return true;</span> |
| <span class="source-line-no">287</span><span id="line-287"> }</span> |
| <span class="source-line-no">288</span><span id="line-288"></span> |
| <span class="source-line-no">289</span><span id="line-289"> @Override</span> |
| <span class="source-line-no">290</span><span id="line-290"> public Optional<ExtendedCell> getLastKey() {</span> |
| <span class="source-line-no">291</span><span id="line-291"> if (top) {</span> |
| <span class="source-line-no">292</span><span id="line-292"> return super.getLastKey();</span> |
| <span class="source-line-no">293</span><span id="line-293"> }</span> |
| <span class="source-line-no">294</span><span id="line-294"> // Get a scanner that caches the block and that uses pread.</span> |
| <span class="source-line-no">295</span><span id="line-295"> HFileScanner scanner = getScanner(true, true, false);</span> |
| <span class="source-line-no">296</span><span id="line-296"> try {</span> |
| <span class="source-line-no">297</span><span id="line-297"> if (scanner.seekBefore(this.splitCell)) {</span> |
| <span class="source-line-no">298</span><span id="line-298"> return Optional.ofNullable(scanner.getKey());</span> |
| <span class="source-line-no">299</span><span id="line-299"> }</span> |
| <span class="source-line-no">300</span><span id="line-300"> } catch (IOException e) {</span> |
| <span class="source-line-no">301</span><span id="line-301"> LOG.warn("Failed seekBefore " + Bytes.toStringBinary(this.splitkey), e);</span> |
| <span class="source-line-no">302</span><span id="line-302"> } finally {</span> |
| <span class="source-line-no">303</span><span id="line-303"> if (scanner != null) {</span> |
| <span class="source-line-no">304</span><span id="line-304"> scanner.close();</span> |
| <span class="source-line-no">305</span><span id="line-305"> }</span> |
| <span class="source-line-no">306</span><span id="line-306"> }</span> |
| <span class="source-line-no">307</span><span id="line-307"> return Optional.empty();</span> |
| <span class="source-line-no">308</span><span id="line-308"> }</span> |
| <span class="source-line-no">309</span><span id="line-309"></span> |
| <span class="source-line-no">310</span><span id="line-310"> @Override</span> |
| <span class="source-line-no">311</span><span id="line-311"> public Optional<ExtendedCell> midKey() throws IOException {</span> |
| <span class="source-line-no">312</span><span id="line-312"> // Returns null to indicate file is not splitable.</span> |
| <span class="source-line-no">313</span><span id="line-313"> return Optional.empty();</span> |
| <span class="source-line-no">314</span><span id="line-314"> }</span> |
| <span class="source-line-no">315</span><span id="line-315"></span> |
| <span class="source-line-no">316</span><span id="line-316"> @Override</span> |
| <span class="source-line-no">317</span><span id="line-317"> public Optional<ExtendedCell> getFirstKey() {</span> |
| <span class="source-line-no">318</span><span id="line-318"> if (!firstKeySeeked) {</span> |
| <span class="source-line-no">319</span><span id="line-319"> HFileScanner scanner = getScanner(true, true, false);</span> |
| <span class="source-line-no">320</span><span id="line-320"> try {</span> |
| <span class="source-line-no">321</span><span id="line-321"> if (scanner.seekTo()) {</span> |
| <span class="source-line-no">322</span><span id="line-322"> this.firstKey = Optional.ofNullable(scanner.getKey());</span> |
| <span class="source-line-no">323</span><span id="line-323"> }</span> |
| <span class="source-line-no">324</span><span id="line-324"> firstKeySeeked = true;</span> |
| <span class="source-line-no">325</span><span id="line-325"> } catch (IOException e) {</span> |
| <span class="source-line-no">326</span><span id="line-326"> LOG.warn("Failed seekTo first KV in the file", e);</span> |
| <span class="source-line-no">327</span><span id="line-327"> } finally {</span> |
| <span class="source-line-no">328</span><span id="line-328"> if (scanner != null) {</span> |
| <span class="source-line-no">329</span><span id="line-329"> scanner.close();</span> |
| <span class="source-line-no">330</span><span id="line-330"> }</span> |
| <span class="source-line-no">331</span><span id="line-331"> }</span> |
| <span class="source-line-no">332</span><span id="line-332"> }</span> |
| <span class="source-line-no">333</span><span id="line-333"> return this.firstKey;</span> |
| <span class="source-line-no">334</span><span id="line-334"> }</span> |
| <span class="source-line-no">335</span><span id="line-335"></span> |
| <span class="source-line-no">336</span><span id="line-336"> @Override</span> |
| <span class="source-line-no">337</span><span id="line-337"> public long getEntries() {</span> |
| <span class="source-line-no">338</span><span id="line-338"> // Estimate the number of entries as half the original file; this may be wildly inaccurate.</span> |
| <span class="source-line-no">339</span><span id="line-339"> return super.getEntries() / 2;</span> |
| <span class="source-line-no">340</span><span id="line-340"> }</span> |
| <span class="source-line-no">341</span><span id="line-341"></span> |
| <span class="source-line-no">342</span><span id="line-342"> @Override</span> |
| <span class="source-line-no">343</span><span id="line-343"> public long getFilterEntries() {</span> |
| <span class="source-line-no">344</span><span id="line-344"> // Estimate the number of entries as half the original file; this may be wildly inaccurate.</span> |
| <span class="source-line-no">345</span><span id="line-345"> return super.getFilterEntries() / 2;</span> |
| <span class="source-line-no">346</span><span id="line-346"> }</span> |
| <span class="source-line-no">347</span><span id="line-347"></span> |
| <span class="source-line-no">348</span><span id="line-348"> /**</span> |
| <span class="source-line-no">349</span><span id="line-349"> * Overrides close method to handle cache evictions for the referred file. If evictionOnClose is</span> |
| <span class="source-line-no">350</span><span id="line-350"> * true, we will seek to the block containing the splitCell and evict all blocks from offset 0 up</span> |
| <span class="source-line-no">351</span><span id="line-351"> * to that block offset if this is a bottom half reader, or the from the split block offset up to</span> |
| <span class="source-line-no">352</span><span id="line-352"> * the end of the file if this is a top half reader.</span> |
| <span class="source-line-no">353</span><span id="line-353"> * @param evictOnClose true if it should evict the file blocks from the cache.</span> |
| <span class="source-line-no">354</span><span id="line-354"> */</span> |
| <span class="source-line-no">355</span><span id="line-355"> @Override</span> |
| <span class="source-line-no">356</span><span id="line-356"> public void close(boolean evictOnClose) throws IOException {</span> |
| <span class="source-line-no">357</span><span id="line-357"> if (closed.compareAndSet(false, true)) {</span> |
| <span class="source-line-no">358</span><span id="line-358"> if (evictOnClose) {</span> |
| <span class="source-line-no">359</span><span id="line-359"> final HFileReaderImpl.HFileScannerImpl s =</span> |
| <span class="source-line-no">360</span><span id="line-360"> (HFileReaderImpl.HFileScannerImpl) super.getScanner(false, true, false);</span> |
| <span class="source-line-no">361</span><span id="line-361"> final String reference = this.reader.getHFileInfo().getHFileContext().getHFileName();</span> |
| <span class="source-line-no">362</span><span id="line-362"> final String referred = StoreFileInfo.getReferredToRegionAndFile(reference).getSecond();</span> |
| <span class="source-line-no">363</span><span id="line-363"> s.seekTo(splitCell);</span> |
| <span class="source-line-no">364</span><span id="line-364"> if (s.getCurBlock() != null) {</span> |
| <span class="source-line-no">365</span><span id="line-365"> long offset = s.getCurBlock().getOffset();</span> |
| <span class="source-line-no">366</span><span id="line-366"> LOG.trace("Seeking to split cell in reader: {} for file: {} top: {}, split offset: {}",</span> |
| <span class="source-line-no">367</span><span id="line-367"> this, reference, top, offset);</span> |
| <span class="source-line-no">368</span><span id="line-368"> ((HFileReaderImpl) reader).getCacheConf().getBlockCache().ifPresent(cache -> {</span> |
| <span class="source-line-no">369</span><span id="line-369"> int numEvictedReferred = top</span> |
| <span class="source-line-no">370</span><span id="line-370"> ? cache.evictBlocksRangeByHfileName(referred, offset, Long.MAX_VALUE)</span> |
| <span class="source-line-no">371</span><span id="line-371"> : cache.evictBlocksRangeByHfileName(referred, 0, offset);</span> |
| <span class="source-line-no">372</span><span id="line-372"> int numEvictedReference = cache.evictBlocksByHfileName(reference);</span> |
| <span class="source-line-no">373</span><span id="line-373"> LOG.trace(</span> |
| <span class="source-line-no">374</span><span id="line-374"> "Closing reference: {}; referred file: {}; was top? {}; evicted for referred: {};"</span> |
| <span class="source-line-no">375</span><span id="line-375"> + "evicted for reference: {}",</span> |
| <span class="source-line-no">376</span><span id="line-376"> reference, referred, top, numEvictedReferred, numEvictedReference);</span> |
| <span class="source-line-no">377</span><span id="line-377"> });</span> |
| <span class="source-line-no">378</span><span id="line-378"> }</span> |
| <span class="source-line-no">379</span><span id="line-379"> reader.close(false);</span> |
| <span class="source-line-no">380</span><span id="line-380"> } else {</span> |
| <span class="source-line-no">381</span><span id="line-381"> reader.close(evictOnClose);</span> |
| <span class="source-line-no">382</span><span id="line-382"> }</span> |
| <span class="source-line-no">383</span><span id="line-383"> }</span> |
| <span class="source-line-no">384</span><span id="line-384"> }</span> |
| <span class="source-line-no">385</span><span id="line-385">}</span> |
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| </pre> |
| </div> |
| </main> |
| </body> |
| </html> |
