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| <pre><span class="sourceLineNo">001</span>/*<a name="line.1"></a> |
| <span class="sourceLineNo">002</span> * Licensed to the Apache Software Foundation (ASF) under one<a name="line.2"></a> |
| <span class="sourceLineNo">003</span> * or more contributor license agreements. See the NOTICE file<a name="line.3"></a> |
| <span class="sourceLineNo">004</span> * distributed with this work for additional information<a name="line.4"></a> |
| <span class="sourceLineNo">005</span> * regarding copyright ownership. The ASF licenses this file<a name="line.5"></a> |
| <span class="sourceLineNo">006</span> * to you under the Apache License, Version 2.0 (the<a name="line.6"></a> |
| <span class="sourceLineNo">007</span> * "License"); you may not use this file except in compliance<a name="line.7"></a> |
| <span class="sourceLineNo">008</span> * with the License. You may obtain a copy of the License at<a name="line.8"></a> |
| <span class="sourceLineNo">009</span> *<a name="line.9"></a> |
| <span class="sourceLineNo">010</span> * http://www.apache.org/licenses/LICENSE-2.0<a name="line.10"></a> |
| <span class="sourceLineNo">011</span> *<a name="line.11"></a> |
| <span class="sourceLineNo">012</span> * Unless required by applicable law or agreed to in writing, software<a name="line.12"></a> |
| <span class="sourceLineNo">013</span> * distributed under the License is distributed on an "AS IS" BASIS,<a name="line.13"></a> |
| <span class="sourceLineNo">014</span> * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.<a name="line.14"></a> |
| <span class="sourceLineNo">015</span> * See the License for the specific language governing permissions and<a name="line.15"></a> |
| <span class="sourceLineNo">016</span> * limitations under the License.<a name="line.16"></a> |
| <span class="sourceLineNo">017</span> */<a name="line.17"></a> |
| <span class="sourceLineNo">018</span>package org.apache.hadoop.hbase.regionserver;<a name="line.18"></a> |
| <span class="sourceLineNo">019</span><a name="line.19"></a> |
| <span class="sourceLineNo">020</span>import java.io.FileNotFoundException;<a name="line.20"></a> |
| <span class="sourceLineNo">021</span>import java.io.IOException;<a name="line.21"></a> |
| <span class="sourceLineNo">022</span>import java.util.ArrayList;<a name="line.22"></a> |
| <span class="sourceLineNo">023</span>import java.util.Collection;<a name="line.23"></a> |
| <span class="sourceLineNo">024</span>import java.util.Collections;<a name="line.24"></a> |
| <span class="sourceLineNo">025</span>import java.util.List;<a name="line.25"></a> |
| <span class="sourceLineNo">026</span>import java.util.Optional;<a name="line.26"></a> |
| <span class="sourceLineNo">027</span>import java.util.PriorityQueue;<a name="line.27"></a> |
| <span class="sourceLineNo">028</span>import java.util.concurrent.atomic.LongAdder;<a name="line.28"></a> |
| <span class="sourceLineNo">029</span>import org.apache.hadoop.fs.Path;<a name="line.29"></a> |
| <span class="sourceLineNo">030</span>import org.apache.hadoop.hbase.Cell;<a name="line.30"></a> |
| <span class="sourceLineNo">031</span>import org.apache.hadoop.hbase.CellComparator;<a name="line.31"></a> |
| <span class="sourceLineNo">032</span>import org.apache.hadoop.hbase.HBaseInterfaceAudience;<a name="line.32"></a> |
| <span class="sourceLineNo">033</span>import org.apache.hadoop.hbase.HConstants;<a name="line.33"></a> |
| <span class="sourceLineNo">034</span>import org.apache.hadoop.hbase.PrivateCellUtil;<a name="line.34"></a> |
| <span class="sourceLineNo">035</span>import org.apache.hadoop.hbase.client.Scan;<a name="line.35"></a> |
| <span class="sourceLineNo">036</span>import org.apache.hadoop.hbase.io.TimeRange;<a name="line.36"></a> |
| <span class="sourceLineNo">037</span>import org.apache.hadoop.hbase.io.hfile.HFileScanner;<a name="line.37"></a> |
| <span class="sourceLineNo">038</span>import org.apache.hadoop.hbase.regionserver.querymatcher.ScanQueryMatcher;<a name="line.38"></a> |
| <span class="sourceLineNo">039</span>import org.apache.yetus.audience.InterfaceAudience;<a name="line.39"></a> |
| <span class="sourceLineNo">040</span>import org.apache.yetus.audience.InterfaceStability;<a name="line.40"></a> |
| <span class="sourceLineNo">041</span><a name="line.41"></a> |
| <span class="sourceLineNo">042</span>/**<a name="line.42"></a> |
| <span class="sourceLineNo">043</span> * KeyValueScanner adaptor over the Reader. It also provides hooks into bloom filter things.<a name="line.43"></a> |
| <span class="sourceLineNo">044</span> */<a name="line.44"></a> |
| <span class="sourceLineNo">045</span>@InterfaceAudience.LimitedPrivate(HBaseInterfaceAudience.PHOENIX)<a name="line.45"></a> |
| <span class="sourceLineNo">046</span>@InterfaceStability.Evolving<a name="line.46"></a> |
| <span class="sourceLineNo">047</span>public class StoreFileScanner implements KeyValueScanner {<a name="line.47"></a> |
| <span class="sourceLineNo">048</span> // the reader it comes from:<a name="line.48"></a> |
| <span class="sourceLineNo">049</span> private final StoreFileReader reader;<a name="line.49"></a> |
| <span class="sourceLineNo">050</span> private final HFileScanner hfs;<a name="line.50"></a> |
| <span class="sourceLineNo">051</span> private Cell cur = null;<a name="line.51"></a> |
| <span class="sourceLineNo">052</span> private boolean closed = false;<a name="line.52"></a> |
| <span class="sourceLineNo">053</span><a name="line.53"></a> |
| <span class="sourceLineNo">054</span> private boolean realSeekDone;<a name="line.54"></a> |
| <span class="sourceLineNo">055</span> private boolean delayedReseek;<a name="line.55"></a> |
| <span class="sourceLineNo">056</span> private Cell delayedSeekKV;<a name="line.56"></a> |
| <span class="sourceLineNo">057</span><a name="line.57"></a> |
| <span class="sourceLineNo">058</span> private final boolean enforceMVCC;<a name="line.58"></a> |
| <span class="sourceLineNo">059</span> private final boolean hasMVCCInfo;<a name="line.59"></a> |
| <span class="sourceLineNo">060</span> // A flag represents whether could stop skipping KeyValues for MVCC<a name="line.60"></a> |
| <span class="sourceLineNo">061</span> // if have encountered the next row. Only used for reversed scan<a name="line.61"></a> |
| <span class="sourceLineNo">062</span> private boolean stopSkippingKVsIfNextRow = false;<a name="line.62"></a> |
| <span class="sourceLineNo">063</span><a name="line.63"></a> |
| <span class="sourceLineNo">064</span> private static LongAdder seekCount;<a name="line.64"></a> |
| <span class="sourceLineNo">065</span><a name="line.65"></a> |
| <span class="sourceLineNo">066</span> private final boolean canOptimizeForNonNullColumn;<a name="line.66"></a> |
| <span class="sourceLineNo">067</span><a name="line.67"></a> |
| <span class="sourceLineNo">068</span> private final long readPt;<a name="line.68"></a> |
| <span class="sourceLineNo">069</span><a name="line.69"></a> |
| <span class="sourceLineNo">070</span> // Order of this scanner relative to other scanners when duplicate key-value is found.<a name="line.70"></a> |
| <span class="sourceLineNo">071</span> // Higher values means scanner has newer data.<a name="line.71"></a> |
| <span class="sourceLineNo">072</span> private final long scannerOrder;<a name="line.72"></a> |
| <span class="sourceLineNo">073</span><a name="line.73"></a> |
| <span class="sourceLineNo">074</span> /**<a name="line.74"></a> |
| <span class="sourceLineNo">075</span> * Implements a {@link KeyValueScanner} on top of the specified {@link HFileScanner}<a name="line.75"></a> |
| <span class="sourceLineNo">076</span> * @param useMVCC If true, scanner will filter out updates with MVCC larger<a name="line.76"></a> |
| <span class="sourceLineNo">077</span> * than {@code readPt}.<a name="line.77"></a> |
| <span class="sourceLineNo">078</span> * @param readPt MVCC value to use to filter out the updates newer than this<a name="line.78"></a> |
| <span class="sourceLineNo">079</span> * scanner.<a name="line.79"></a> |
| <span class="sourceLineNo">080</span> * @param hasMVCC Set to true if underlying store file reader has MVCC info.<a name="line.80"></a> |
| <span class="sourceLineNo">081</span> * @param scannerOrder Order of the scanner relative to other scanners. See<a name="line.81"></a> |
| <span class="sourceLineNo">082</span> * {@link KeyValueScanner#getScannerOrder()}.<a name="line.82"></a> |
| <span class="sourceLineNo">083</span> * @param canOptimizeForNonNullColumn {@code true} if we can make sure there is no null column,<a name="line.83"></a> |
| <span class="sourceLineNo">084</span> * otherwise {@code false}. This is a hint for optimization.<a name="line.84"></a> |
| <span class="sourceLineNo">085</span> */<a name="line.85"></a> |
| <span class="sourceLineNo">086</span> public StoreFileScanner(StoreFileReader reader, HFileScanner hfs, boolean useMVCC,<a name="line.86"></a> |
| <span class="sourceLineNo">087</span> boolean hasMVCC, long readPt, long scannerOrder, boolean canOptimizeForNonNullColumn) {<a name="line.87"></a> |
| <span class="sourceLineNo">088</span> this.readPt = readPt;<a name="line.88"></a> |
| <span class="sourceLineNo">089</span> this.reader = reader;<a name="line.89"></a> |
| <span class="sourceLineNo">090</span> this.hfs = hfs;<a name="line.90"></a> |
| <span class="sourceLineNo">091</span> this.enforceMVCC = useMVCC;<a name="line.91"></a> |
| <span class="sourceLineNo">092</span> this.hasMVCCInfo = hasMVCC;<a name="line.92"></a> |
| <span class="sourceLineNo">093</span> this.scannerOrder = scannerOrder;<a name="line.93"></a> |
| <span class="sourceLineNo">094</span> this.canOptimizeForNonNullColumn = canOptimizeForNonNullColumn;<a name="line.94"></a> |
| <span class="sourceLineNo">095</span> this.reader.incrementRefCount();<a name="line.95"></a> |
| <span class="sourceLineNo">096</span> }<a name="line.96"></a> |
| <span class="sourceLineNo">097</span><a name="line.97"></a> |
| <span class="sourceLineNo">098</span> /**<a name="line.98"></a> |
| <span class="sourceLineNo">099</span> * Return an array of scanners corresponding to the given set of store files.<a name="line.99"></a> |
| <span class="sourceLineNo">100</span> */<a name="line.100"></a> |
| <span class="sourceLineNo">101</span> public static List<StoreFileScanner> getScannersForStoreFiles(Collection<HStoreFile> files,<a name="line.101"></a> |
| <span class="sourceLineNo">102</span> boolean cacheBlocks, boolean usePread, boolean isCompaction, boolean useDropBehind, long readPt)<a name="line.102"></a> |
| <span class="sourceLineNo">103</span> throws IOException {<a name="line.103"></a> |
| <span class="sourceLineNo">104</span> return getScannersForStoreFiles(files, cacheBlocks, usePread, isCompaction, useDropBehind, null,<a name="line.104"></a> |
| <span class="sourceLineNo">105</span> readPt);<a name="line.105"></a> |
| <span class="sourceLineNo">106</span> }<a name="line.106"></a> |
| <span class="sourceLineNo">107</span><a name="line.107"></a> |
| <span class="sourceLineNo">108</span> /**<a name="line.108"></a> |
| <span class="sourceLineNo">109</span> * Return an array of scanners corresponding to the given set of store files, And set the<a name="line.109"></a> |
| <span class="sourceLineNo">110</span> * ScanQueryMatcher for each store file scanner for further optimization<a name="line.110"></a> |
| <span class="sourceLineNo">111</span> */<a name="line.111"></a> |
| <span class="sourceLineNo">112</span> public static List<StoreFileScanner> getScannersForStoreFiles(Collection<HStoreFile> files,<a name="line.112"></a> |
| <span class="sourceLineNo">113</span> boolean cacheBlocks, boolean usePread, boolean isCompaction, boolean canUseDrop,<a name="line.113"></a> |
| <span class="sourceLineNo">114</span> ScanQueryMatcher matcher, long readPt) throws IOException {<a name="line.114"></a> |
| <span class="sourceLineNo">115</span> if (files.isEmpty()) {<a name="line.115"></a> |
| <span class="sourceLineNo">116</span> return Collections.emptyList();<a name="line.116"></a> |
| <span class="sourceLineNo">117</span> }<a name="line.117"></a> |
| <span class="sourceLineNo">118</span> List<StoreFileScanner> scanners = new ArrayList<>(files.size());<a name="line.118"></a> |
| <span class="sourceLineNo">119</span> boolean canOptimizeForNonNullColumn = matcher != null ? !matcher.hasNullColumnInQuery() : false;<a name="line.119"></a> |
| <span class="sourceLineNo">120</span> PriorityQueue<HStoreFile> sortedFiles =<a name="line.120"></a> |
| <span class="sourceLineNo">121</span> new PriorityQueue<>(files.size(), StoreFileComparators.SEQ_ID);<a name="line.121"></a> |
| <span class="sourceLineNo">122</span> for (HStoreFile file : files) {<a name="line.122"></a> |
| <span class="sourceLineNo">123</span> // The sort function needs metadata so we need to open reader first before sorting the list.<a name="line.123"></a> |
| <span class="sourceLineNo">124</span> file.initReader();<a name="line.124"></a> |
| <span class="sourceLineNo">125</span> sortedFiles.add(file);<a name="line.125"></a> |
| <span class="sourceLineNo">126</span> }<a name="line.126"></a> |
| <span class="sourceLineNo">127</span> boolean succ = false;<a name="line.127"></a> |
| <span class="sourceLineNo">128</span> try {<a name="line.128"></a> |
| <span class="sourceLineNo">129</span> for (int i = 0, n = files.size(); i < n; i++) {<a name="line.129"></a> |
| <span class="sourceLineNo">130</span> HStoreFile sf = sortedFiles.remove();<a name="line.130"></a> |
| <span class="sourceLineNo">131</span> StoreFileScanner scanner;<a name="line.131"></a> |
| <span class="sourceLineNo">132</span> if (usePread) {<a name="line.132"></a> |
| <span class="sourceLineNo">133</span> scanner = sf.getPreadScanner(cacheBlocks, readPt, i, canOptimizeForNonNullColumn);<a name="line.133"></a> |
| <span class="sourceLineNo">134</span> } else {<a name="line.134"></a> |
| <span class="sourceLineNo">135</span> scanner = sf.getStreamScanner(canUseDrop, cacheBlocks, isCompaction, readPt, i,<a name="line.135"></a> |
| <span class="sourceLineNo">136</span> canOptimizeForNonNullColumn);<a name="line.136"></a> |
| <span class="sourceLineNo">137</span> }<a name="line.137"></a> |
| <span class="sourceLineNo">138</span> scanners.add(scanner);<a name="line.138"></a> |
| <span class="sourceLineNo">139</span> }<a name="line.139"></a> |
| <span class="sourceLineNo">140</span> succ = true;<a name="line.140"></a> |
| <span class="sourceLineNo">141</span> } finally {<a name="line.141"></a> |
| <span class="sourceLineNo">142</span> if (!succ) {<a name="line.142"></a> |
| <span class="sourceLineNo">143</span> for (StoreFileScanner scanner : scanners) {<a name="line.143"></a> |
| <span class="sourceLineNo">144</span> scanner.close();<a name="line.144"></a> |
| <span class="sourceLineNo">145</span> }<a name="line.145"></a> |
| <span class="sourceLineNo">146</span> }<a name="line.146"></a> |
| <span class="sourceLineNo">147</span> }<a name="line.147"></a> |
| <span class="sourceLineNo">148</span> return scanners;<a name="line.148"></a> |
| <span class="sourceLineNo">149</span> }<a name="line.149"></a> |
| <span class="sourceLineNo">150</span><a name="line.150"></a> |
| <span class="sourceLineNo">151</span> /**<a name="line.151"></a> |
| <span class="sourceLineNo">152</span> * Get scanners for compaction. We will create a separated reader for each store file to avoid<a name="line.152"></a> |
| <span class="sourceLineNo">153</span> * contention with normal read request.<a name="line.153"></a> |
| <span class="sourceLineNo">154</span> */<a name="line.154"></a> |
| <span class="sourceLineNo">155</span> public static List<StoreFileScanner> getScannersForCompaction(Collection<HStoreFile> files,<a name="line.155"></a> |
| <span class="sourceLineNo">156</span> boolean canUseDropBehind, long readPt) throws IOException {<a name="line.156"></a> |
| <span class="sourceLineNo">157</span> List<StoreFileScanner> scanners = new ArrayList<>(files.size());<a name="line.157"></a> |
| <span class="sourceLineNo">158</span> List<HStoreFile> sortedFiles = new ArrayList<>(files);<a name="line.158"></a> |
| <span class="sourceLineNo">159</span> Collections.sort(sortedFiles, StoreFileComparators.SEQ_ID);<a name="line.159"></a> |
| <span class="sourceLineNo">160</span> boolean succ = false;<a name="line.160"></a> |
| <span class="sourceLineNo">161</span> try {<a name="line.161"></a> |
| <span class="sourceLineNo">162</span> for (int i = 0, n = sortedFiles.size(); i < n; i++) {<a name="line.162"></a> |
| <span class="sourceLineNo">163</span> scanners.add(<a name="line.163"></a> |
| <span class="sourceLineNo">164</span> sortedFiles.get(i).getStreamScanner(canUseDropBehind, false, true, readPt, i, false));<a name="line.164"></a> |
| <span class="sourceLineNo">165</span> }<a name="line.165"></a> |
| <span class="sourceLineNo">166</span> succ = true;<a name="line.166"></a> |
| <span class="sourceLineNo">167</span> } finally {<a name="line.167"></a> |
| <span class="sourceLineNo">168</span> if (!succ) {<a name="line.168"></a> |
| <span class="sourceLineNo">169</span> for (StoreFileScanner scanner : scanners) {<a name="line.169"></a> |
| <span class="sourceLineNo">170</span> scanner.close();<a name="line.170"></a> |
| <span class="sourceLineNo">171</span> }<a name="line.171"></a> |
| <span class="sourceLineNo">172</span> }<a name="line.172"></a> |
| <span class="sourceLineNo">173</span> }<a name="line.173"></a> |
| <span class="sourceLineNo">174</span> return scanners;<a name="line.174"></a> |
| <span class="sourceLineNo">175</span> }<a name="line.175"></a> |
| <span class="sourceLineNo">176</span><a name="line.176"></a> |
| <span class="sourceLineNo">177</span> @Override<a name="line.177"></a> |
| <span class="sourceLineNo">178</span> public String toString() {<a name="line.178"></a> |
| <span class="sourceLineNo">179</span> return "StoreFileScanner[" + hfs.toString() + ", cur=" + cur + "]";<a name="line.179"></a> |
| <span class="sourceLineNo">180</span> }<a name="line.180"></a> |
| <span class="sourceLineNo">181</span><a name="line.181"></a> |
| <span class="sourceLineNo">182</span> @Override<a name="line.182"></a> |
| <span class="sourceLineNo">183</span> public Cell peek() {<a name="line.183"></a> |
| <span class="sourceLineNo">184</span> return cur;<a name="line.184"></a> |
| <span class="sourceLineNo">185</span> }<a name="line.185"></a> |
| <span class="sourceLineNo">186</span><a name="line.186"></a> |
| <span class="sourceLineNo">187</span> @Override<a name="line.187"></a> |
| <span class="sourceLineNo">188</span> public Cell next() throws IOException {<a name="line.188"></a> |
| <span class="sourceLineNo">189</span> Cell retKey = cur;<a name="line.189"></a> |
| <span class="sourceLineNo">190</span><a name="line.190"></a> |
| <span class="sourceLineNo">191</span> try {<a name="line.191"></a> |
| <span class="sourceLineNo">192</span> // only seek if we aren't at the end. cur == null implies 'end'.<a name="line.192"></a> |
| <span class="sourceLineNo">193</span> if (cur != null) {<a name="line.193"></a> |
| <span class="sourceLineNo">194</span> hfs.next();<a name="line.194"></a> |
| <span class="sourceLineNo">195</span> setCurrentCell(hfs.getCell());<a name="line.195"></a> |
| <span class="sourceLineNo">196</span> if (hasMVCCInfo || this.reader.isBulkLoaded()) {<a name="line.196"></a> |
| <span class="sourceLineNo">197</span> skipKVsNewerThanReadpoint();<a name="line.197"></a> |
| <span class="sourceLineNo">198</span> }<a name="line.198"></a> |
| <span class="sourceLineNo">199</span> }<a name="line.199"></a> |
| <span class="sourceLineNo">200</span> } catch (FileNotFoundException e) {<a name="line.200"></a> |
| <span class="sourceLineNo">201</span> throw e;<a name="line.201"></a> |
| <span class="sourceLineNo">202</span> } catch (IOException e) {<a name="line.202"></a> |
| <span class="sourceLineNo">203</span> throw new IOException("Could not iterate " + this, e);<a name="line.203"></a> |
| <span class="sourceLineNo">204</span> }<a name="line.204"></a> |
| <span class="sourceLineNo">205</span> return retKey;<a name="line.205"></a> |
| <span class="sourceLineNo">206</span> }<a name="line.206"></a> |
| <span class="sourceLineNo">207</span><a name="line.207"></a> |
| <span class="sourceLineNo">208</span> @Override<a name="line.208"></a> |
| <span class="sourceLineNo">209</span> public boolean seek(Cell key) throws IOException {<a name="line.209"></a> |
| <span class="sourceLineNo">210</span> if (seekCount != null) seekCount.increment();<a name="line.210"></a> |
| <span class="sourceLineNo">211</span><a name="line.211"></a> |
| <span class="sourceLineNo">212</span> try {<a name="line.212"></a> |
| <span class="sourceLineNo">213</span> try {<a name="line.213"></a> |
| <span class="sourceLineNo">214</span> if (!seekAtOrAfter(hfs, key)) {<a name="line.214"></a> |
| <span class="sourceLineNo">215</span> this.cur = null;<a name="line.215"></a> |
| <span class="sourceLineNo">216</span> return false;<a name="line.216"></a> |
| <span class="sourceLineNo">217</span> }<a name="line.217"></a> |
| <span class="sourceLineNo">218</span><a name="line.218"></a> |
| <span class="sourceLineNo">219</span> setCurrentCell(hfs.getCell());<a name="line.219"></a> |
| <span class="sourceLineNo">220</span><a name="line.220"></a> |
| <span class="sourceLineNo">221</span> if (!hasMVCCInfo && this.reader.isBulkLoaded()) {<a name="line.221"></a> |
| <span class="sourceLineNo">222</span> return skipKVsNewerThanReadpoint();<a name="line.222"></a> |
| <span class="sourceLineNo">223</span> } else {<a name="line.223"></a> |
| <span class="sourceLineNo">224</span> return !hasMVCCInfo ? true : skipKVsNewerThanReadpoint();<a name="line.224"></a> |
| <span class="sourceLineNo">225</span> }<a name="line.225"></a> |
| <span class="sourceLineNo">226</span> } finally {<a name="line.226"></a> |
| <span class="sourceLineNo">227</span> realSeekDone = true;<a name="line.227"></a> |
| <span class="sourceLineNo">228</span> }<a name="line.228"></a> |
| <span class="sourceLineNo">229</span> } catch (FileNotFoundException e) {<a name="line.229"></a> |
| <span class="sourceLineNo">230</span> throw e;<a name="line.230"></a> |
| <span class="sourceLineNo">231</span> } catch (IOException ioe) {<a name="line.231"></a> |
| <span class="sourceLineNo">232</span> throw new IOException("Could not seek " + this + " to key " + key, ioe);<a name="line.232"></a> |
| <span class="sourceLineNo">233</span> }<a name="line.233"></a> |
| <span class="sourceLineNo">234</span> }<a name="line.234"></a> |
| <span class="sourceLineNo">235</span><a name="line.235"></a> |
| <span class="sourceLineNo">236</span> @Override<a name="line.236"></a> |
| <span class="sourceLineNo">237</span> public boolean reseek(Cell key) throws IOException {<a name="line.237"></a> |
| <span class="sourceLineNo">238</span> if (seekCount != null) seekCount.increment();<a name="line.238"></a> |
| <span class="sourceLineNo">239</span><a name="line.239"></a> |
| <span class="sourceLineNo">240</span> try {<a name="line.240"></a> |
| <span class="sourceLineNo">241</span> try {<a name="line.241"></a> |
| <span class="sourceLineNo">242</span> if (!reseekAtOrAfter(hfs, key)) {<a name="line.242"></a> |
| <span class="sourceLineNo">243</span> this.cur = null;<a name="line.243"></a> |
| <span class="sourceLineNo">244</span> return false;<a name="line.244"></a> |
| <span class="sourceLineNo">245</span> }<a name="line.245"></a> |
| <span class="sourceLineNo">246</span> setCurrentCell(hfs.getCell());<a name="line.246"></a> |
| <span class="sourceLineNo">247</span><a name="line.247"></a> |
| <span class="sourceLineNo">248</span> if (!hasMVCCInfo && this.reader.isBulkLoaded()) {<a name="line.248"></a> |
| <span class="sourceLineNo">249</span> return skipKVsNewerThanReadpoint();<a name="line.249"></a> |
| <span class="sourceLineNo">250</span> } else {<a name="line.250"></a> |
| <span class="sourceLineNo">251</span> return !hasMVCCInfo ? true : skipKVsNewerThanReadpoint();<a name="line.251"></a> |
| <span class="sourceLineNo">252</span> }<a name="line.252"></a> |
| <span class="sourceLineNo">253</span> } finally {<a name="line.253"></a> |
| <span class="sourceLineNo">254</span> realSeekDone = true;<a name="line.254"></a> |
| <span class="sourceLineNo">255</span> }<a name="line.255"></a> |
| <span class="sourceLineNo">256</span> } catch (FileNotFoundException e) {<a name="line.256"></a> |
| <span class="sourceLineNo">257</span> throw e;<a name="line.257"></a> |
| <span class="sourceLineNo">258</span> } catch (IOException ioe) {<a name="line.258"></a> |
| <span class="sourceLineNo">259</span> throw new IOException("Could not reseek " + this + " to key " + key, ioe);<a name="line.259"></a> |
| <span class="sourceLineNo">260</span> }<a name="line.260"></a> |
| <span class="sourceLineNo">261</span> }<a name="line.261"></a> |
| <span class="sourceLineNo">262</span><a name="line.262"></a> |
| <span class="sourceLineNo">263</span> protected void setCurrentCell(Cell newVal) throws IOException {<a name="line.263"></a> |
| <span class="sourceLineNo">264</span> this.cur = newVal;<a name="line.264"></a> |
| <span class="sourceLineNo">265</span> if (this.cur != null && this.reader.isBulkLoaded() && !this.reader.isSkipResetSeqId()) {<a name="line.265"></a> |
| <span class="sourceLineNo">266</span> PrivateCellUtil.setSequenceId(cur, this.reader.getSequenceID());<a name="line.266"></a> |
| <span class="sourceLineNo">267</span> }<a name="line.267"></a> |
| <span class="sourceLineNo">268</span> }<a name="line.268"></a> |
| <span class="sourceLineNo">269</span><a name="line.269"></a> |
| <span class="sourceLineNo">270</span> protected boolean skipKVsNewerThanReadpoint() throws IOException {<a name="line.270"></a> |
| <span class="sourceLineNo">271</span> // We want to ignore all key-values that are newer than our current<a name="line.271"></a> |
| <span class="sourceLineNo">272</span> // readPoint<a name="line.272"></a> |
| <span class="sourceLineNo">273</span> Cell startKV = cur;<a name="line.273"></a> |
| <span class="sourceLineNo">274</span> while (enforceMVCC && cur != null && (cur.getSequenceId() > readPt)) {<a name="line.274"></a> |
| <span class="sourceLineNo">275</span> boolean hasNext = hfs.next();<a name="line.275"></a> |
| <span class="sourceLineNo">276</span> setCurrentCell(hfs.getCell());<a name="line.276"></a> |
| <span class="sourceLineNo">277</span> if (<a name="line.277"></a> |
| <span class="sourceLineNo">278</span> hasNext && this.stopSkippingKVsIfNextRow && getComparator().compareRows(cur, startKV) > 0<a name="line.278"></a> |
| <span class="sourceLineNo">279</span> ) {<a name="line.279"></a> |
| <span class="sourceLineNo">280</span> return false;<a name="line.280"></a> |
| <span class="sourceLineNo">281</span> }<a name="line.281"></a> |
| <span class="sourceLineNo">282</span> }<a name="line.282"></a> |
| <span class="sourceLineNo">283</span><a name="line.283"></a> |
| <span class="sourceLineNo">284</span> if (cur == null) {<a name="line.284"></a> |
| <span class="sourceLineNo">285</span> return false;<a name="line.285"></a> |
| <span class="sourceLineNo">286</span> }<a name="line.286"></a> |
| <span class="sourceLineNo">287</span><a name="line.287"></a> |
| <span class="sourceLineNo">288</span> return true;<a name="line.288"></a> |
| <span class="sourceLineNo">289</span> }<a name="line.289"></a> |
| <span class="sourceLineNo">290</span><a name="line.290"></a> |
| <span class="sourceLineNo">291</span> @Override<a name="line.291"></a> |
| <span class="sourceLineNo">292</span> public void close() {<a name="line.292"></a> |
| <span class="sourceLineNo">293</span> if (closed) return;<a name="line.293"></a> |
| <span class="sourceLineNo">294</span> cur = null;<a name="line.294"></a> |
| <span class="sourceLineNo">295</span> this.hfs.close();<a name="line.295"></a> |
| <span class="sourceLineNo">296</span> if (this.reader != null) {<a name="line.296"></a> |
| <span class="sourceLineNo">297</span> this.reader.readCompleted();<a name="line.297"></a> |
| <span class="sourceLineNo">298</span> }<a name="line.298"></a> |
| <span class="sourceLineNo">299</span> closed = true;<a name="line.299"></a> |
| <span class="sourceLineNo">300</span> }<a name="line.300"></a> |
| <span class="sourceLineNo">301</span><a name="line.301"></a> |
| <span class="sourceLineNo">302</span> /**<a name="line.302"></a> |
| <span class="sourceLineNo">303</span> * nn * @return false if not found or if k is after the end. n<a name="line.303"></a> |
| <span class="sourceLineNo">304</span> */<a name="line.304"></a> |
| <span class="sourceLineNo">305</span> public static boolean seekAtOrAfter(HFileScanner s, Cell k) throws IOException {<a name="line.305"></a> |
| <span class="sourceLineNo">306</span> int result = s.seekTo(k);<a name="line.306"></a> |
| <span class="sourceLineNo">307</span> if (result < 0) {<a name="line.307"></a> |
| <span class="sourceLineNo">308</span> if (result == HConstants.INDEX_KEY_MAGIC) {<a name="line.308"></a> |
| <span class="sourceLineNo">309</span> // using faked key<a name="line.309"></a> |
| <span class="sourceLineNo">310</span> return true;<a name="line.310"></a> |
| <span class="sourceLineNo">311</span> }<a name="line.311"></a> |
| <span class="sourceLineNo">312</span> // Passed KV is smaller than first KV in file, work from start of file<a name="line.312"></a> |
| <span class="sourceLineNo">313</span> return s.seekTo();<a name="line.313"></a> |
| <span class="sourceLineNo">314</span> } else if (result > 0) {<a name="line.314"></a> |
| <span class="sourceLineNo">315</span> // Passed KV is larger than current KV in file, if there is a next<a name="line.315"></a> |
| <span class="sourceLineNo">316</span> // it is the "after", if not then this scanner is done.<a name="line.316"></a> |
| <span class="sourceLineNo">317</span> return s.next();<a name="line.317"></a> |
| <span class="sourceLineNo">318</span> }<a name="line.318"></a> |
| <span class="sourceLineNo">319</span> // Seeked to the exact key<a name="line.319"></a> |
| <span class="sourceLineNo">320</span> return true;<a name="line.320"></a> |
| <span class="sourceLineNo">321</span> }<a name="line.321"></a> |
| <span class="sourceLineNo">322</span><a name="line.322"></a> |
| <span class="sourceLineNo">323</span> static boolean reseekAtOrAfter(HFileScanner s, Cell k) throws IOException {<a name="line.323"></a> |
| <span class="sourceLineNo">324</span> // This function is similar to seekAtOrAfter function<a name="line.324"></a> |
| <span class="sourceLineNo">325</span> int result = s.reseekTo(k);<a name="line.325"></a> |
| <span class="sourceLineNo">326</span> if (result <= 0) {<a name="line.326"></a> |
| <span class="sourceLineNo">327</span> if (result == HConstants.INDEX_KEY_MAGIC) {<a name="line.327"></a> |
| <span class="sourceLineNo">328</span> // using faked key<a name="line.328"></a> |
| <span class="sourceLineNo">329</span> return true;<a name="line.329"></a> |
| <span class="sourceLineNo">330</span> }<a name="line.330"></a> |
| <span class="sourceLineNo">331</span> // If up to now scanner is not seeked yet, this means passed KV is smaller<a name="line.331"></a> |
| <span class="sourceLineNo">332</span> // than first KV in file, and it is the first time we seek on this file.<a name="line.332"></a> |
| <span class="sourceLineNo">333</span> // So we also need to work from the start of file.<a name="line.333"></a> |
| <span class="sourceLineNo">334</span> if (!s.isSeeked()) {<a name="line.334"></a> |
| <span class="sourceLineNo">335</span> return s.seekTo();<a name="line.335"></a> |
| <span class="sourceLineNo">336</span> }<a name="line.336"></a> |
| <span class="sourceLineNo">337</span> return true;<a name="line.337"></a> |
| <span class="sourceLineNo">338</span> }<a name="line.338"></a> |
| <span class="sourceLineNo">339</span> // passed KV is larger than current KV in file, if there is a next<a name="line.339"></a> |
| <span class="sourceLineNo">340</span> // it is after, if not then this scanner is done.<a name="line.340"></a> |
| <span class="sourceLineNo">341</span> return s.next();<a name="line.341"></a> |
| <span class="sourceLineNo">342</span> }<a name="line.342"></a> |
| <span class="sourceLineNo">343</span><a name="line.343"></a> |
| <span class="sourceLineNo">344</span> /**<a name="line.344"></a> |
| <span class="sourceLineNo">345</span> * @see KeyValueScanner#getScannerOrder()<a name="line.345"></a> |
| <span class="sourceLineNo">346</span> */<a name="line.346"></a> |
| <span class="sourceLineNo">347</span> @Override<a name="line.347"></a> |
| <span class="sourceLineNo">348</span> public long getScannerOrder() {<a name="line.348"></a> |
| <span class="sourceLineNo">349</span> return scannerOrder;<a name="line.349"></a> |
| <span class="sourceLineNo">350</span> }<a name="line.350"></a> |
| <span class="sourceLineNo">351</span><a name="line.351"></a> |
| <span class="sourceLineNo">352</span> /**<a name="line.352"></a> |
| <span class="sourceLineNo">353</span> * Pretend we have done a seek but don't do it yet, if possible. The hope is that we find<a name="line.353"></a> |
| <span class="sourceLineNo">354</span> * requested columns in more recent files and won't have to seek in older files. Creates a fake<a name="line.354"></a> |
| <span class="sourceLineNo">355</span> * key/value with the given row/column and the highest (most recent) possible timestamp we might<a name="line.355"></a> |
| <span class="sourceLineNo">356</span> * get from this file. When users of such "lazy scanner" need to know the next KV precisely (e.g.<a name="line.356"></a> |
| <span class="sourceLineNo">357</span> * when this scanner is at the top of the heap), they run {@link #enforceSeek()}.<a name="line.357"></a> |
| <span class="sourceLineNo">358</span> * <p><a name="line.358"></a> |
| <span class="sourceLineNo">359</span> * Note that this function does guarantee that the current KV of this scanner will be advanced to<a name="line.359"></a> |
| <span class="sourceLineNo">360</span> * at least the given KV. Because of this, it does have to do a real seek in cases when the seek<a name="line.360"></a> |
| <span class="sourceLineNo">361</span> * timestamp is older than the highest timestamp of the file, e.g. when we are trying to seek to<a name="line.361"></a> |
| <span class="sourceLineNo">362</span> * the next row/column and use OLDEST_TIMESTAMP in the seek key.<a name="line.362"></a> |
| <span class="sourceLineNo">363</span> */<a name="line.363"></a> |
| <span class="sourceLineNo">364</span> @Override<a name="line.364"></a> |
| <span class="sourceLineNo">365</span> public boolean requestSeek(Cell kv, boolean forward, boolean useBloom) throws IOException {<a name="line.365"></a> |
| <span class="sourceLineNo">366</span> if (kv.getFamilyLength() == 0) {<a name="line.366"></a> |
| <span class="sourceLineNo">367</span> useBloom = false;<a name="line.367"></a> |
| <span class="sourceLineNo">368</span> }<a name="line.368"></a> |
| <span class="sourceLineNo">369</span><a name="line.369"></a> |
| <span class="sourceLineNo">370</span> boolean haveToSeek = true;<a name="line.370"></a> |
| <span class="sourceLineNo">371</span> if (useBloom) {<a name="line.371"></a> |
| <span class="sourceLineNo">372</span> // check ROWCOL Bloom filter first.<a name="line.372"></a> |
| <span class="sourceLineNo">373</span> if (reader.getBloomFilterType() == BloomType.ROWCOL) {<a name="line.373"></a> |
| <span class="sourceLineNo">374</span> haveToSeek = reader.passesGeneralRowColBloomFilter(kv);<a name="line.374"></a> |
| <span class="sourceLineNo">375</span> } else if (<a name="line.375"></a> |
| <span class="sourceLineNo">376</span> canOptimizeForNonNullColumn<a name="line.376"></a> |
| <span class="sourceLineNo">377</span> && ((PrivateCellUtil.isDeleteFamily(kv) || PrivateCellUtil.isDeleteFamilyVersion(kv)))<a name="line.377"></a> |
| <span class="sourceLineNo">378</span> ) {<a name="line.378"></a> |
| <span class="sourceLineNo">379</span> // if there is no such delete family kv in the store file,<a name="line.379"></a> |
| <span class="sourceLineNo">380</span> // then no need to seek.<a name="line.380"></a> |
| <span class="sourceLineNo">381</span> haveToSeek = reader.passesDeleteFamilyBloomFilter(kv.getRowArray(), kv.getRowOffset(),<a name="line.381"></a> |
| <span class="sourceLineNo">382</span> kv.getRowLength());<a name="line.382"></a> |
| <span class="sourceLineNo">383</span> }<a name="line.383"></a> |
| <span class="sourceLineNo">384</span> }<a name="line.384"></a> |
| <span class="sourceLineNo">385</span><a name="line.385"></a> |
| <span class="sourceLineNo">386</span> delayedReseek = forward;<a name="line.386"></a> |
| <span class="sourceLineNo">387</span> delayedSeekKV = kv;<a name="line.387"></a> |
| <span class="sourceLineNo">388</span><a name="line.388"></a> |
| <span class="sourceLineNo">389</span> if (haveToSeek) {<a name="line.389"></a> |
| <span class="sourceLineNo">390</span> // This row/column might be in this store file (or we did not use the<a name="line.390"></a> |
| <span class="sourceLineNo">391</span> // Bloom filter), so we still need to seek.<a name="line.391"></a> |
| <span class="sourceLineNo">392</span> realSeekDone = false;<a name="line.392"></a> |
| <span class="sourceLineNo">393</span> long maxTimestampInFile = reader.getMaxTimestamp();<a name="line.393"></a> |
| <span class="sourceLineNo">394</span> long seekTimestamp = kv.getTimestamp();<a name="line.394"></a> |
| <span class="sourceLineNo">395</span> if (seekTimestamp > maxTimestampInFile) {<a name="line.395"></a> |
| <span class="sourceLineNo">396</span> // Create a fake key that is not greater than the real next key.<a name="line.396"></a> |
| <span class="sourceLineNo">397</span> // (Lower timestamps correspond to higher KVs.)<a name="line.397"></a> |
| <span class="sourceLineNo">398</span> // To understand this better, consider that we are asked to seek to<a name="line.398"></a> |
| <span class="sourceLineNo">399</span> // a higher timestamp than the max timestamp in this file. We know that<a name="line.399"></a> |
| <span class="sourceLineNo">400</span> // the next point when we have to consider this file again is when we<a name="line.400"></a> |
| <span class="sourceLineNo">401</span> // pass the max timestamp of this file (with the same row/column).<a name="line.401"></a> |
| <span class="sourceLineNo">402</span> setCurrentCell(PrivateCellUtil.createFirstOnRowColTS(kv, maxTimestampInFile));<a name="line.402"></a> |
| <span class="sourceLineNo">403</span> } else {<a name="line.403"></a> |
| <span class="sourceLineNo">404</span> // This will be the case e.g. when we need to seek to the next<a name="line.404"></a> |
| <span class="sourceLineNo">405</span> // row/column, and we don't know exactly what they are, so we set the<a name="line.405"></a> |
| <span class="sourceLineNo">406</span> // seek key's timestamp to OLDEST_TIMESTAMP to skip the rest of this<a name="line.406"></a> |
| <span class="sourceLineNo">407</span> // row/column.<a name="line.407"></a> |
| <span class="sourceLineNo">408</span> enforceSeek();<a name="line.408"></a> |
| <span class="sourceLineNo">409</span> }<a name="line.409"></a> |
| <span class="sourceLineNo">410</span> return cur != null;<a name="line.410"></a> |
| <span class="sourceLineNo">411</span> }<a name="line.411"></a> |
| <span class="sourceLineNo">412</span><a name="line.412"></a> |
| <span class="sourceLineNo">413</span> // Multi-column Bloom filter optimization.<a name="line.413"></a> |
| <span class="sourceLineNo">414</span> // Create a fake key/value, so that this scanner only bubbles up to the top<a name="line.414"></a> |
| <span class="sourceLineNo">415</span> // of the KeyValueHeap in StoreScanner after we scanned this row/column in<a name="line.415"></a> |
| <span class="sourceLineNo">416</span> // all other store files. The query matcher will then just skip this fake<a name="line.416"></a> |
| <span class="sourceLineNo">417</span> // key/value and the store scanner will progress to the next column. This<a name="line.417"></a> |
| <span class="sourceLineNo">418</span> // is obviously not a "real real" seek, but unlike the fake KV earlier in<a name="line.418"></a> |
| <span class="sourceLineNo">419</span> // this method, we want this to be propagated to ScanQueryMatcher.<a name="line.419"></a> |
| <span class="sourceLineNo">420</span> setCurrentCell(PrivateCellUtil.createLastOnRowCol(kv));<a name="line.420"></a> |
| <span class="sourceLineNo">421</span><a name="line.421"></a> |
| <span class="sourceLineNo">422</span> realSeekDone = true;<a name="line.422"></a> |
| <span class="sourceLineNo">423</span> return true;<a name="line.423"></a> |
| <span class="sourceLineNo">424</span> }<a name="line.424"></a> |
| <span class="sourceLineNo">425</span><a name="line.425"></a> |
| <span class="sourceLineNo">426</span> StoreFileReader getReader() {<a name="line.426"></a> |
| <span class="sourceLineNo">427</span> return reader;<a name="line.427"></a> |
| <span class="sourceLineNo">428</span> }<a name="line.428"></a> |
| <span class="sourceLineNo">429</span><a name="line.429"></a> |
| <span class="sourceLineNo">430</span> CellComparator getComparator() {<a name="line.430"></a> |
| <span class="sourceLineNo">431</span> return reader.getComparator();<a name="line.431"></a> |
| <span class="sourceLineNo">432</span> }<a name="line.432"></a> |
| <span class="sourceLineNo">433</span><a name="line.433"></a> |
| <span class="sourceLineNo">434</span> @Override<a name="line.434"></a> |
| <span class="sourceLineNo">435</span> public boolean realSeekDone() {<a name="line.435"></a> |
| <span class="sourceLineNo">436</span> return realSeekDone;<a name="line.436"></a> |
| <span class="sourceLineNo">437</span> }<a name="line.437"></a> |
| <span class="sourceLineNo">438</span><a name="line.438"></a> |
| <span class="sourceLineNo">439</span> @Override<a name="line.439"></a> |
| <span class="sourceLineNo">440</span> public void enforceSeek() throws IOException {<a name="line.440"></a> |
| <span class="sourceLineNo">441</span> if (realSeekDone) return;<a name="line.441"></a> |
| <span class="sourceLineNo">442</span><a name="line.442"></a> |
| <span class="sourceLineNo">443</span> if (delayedReseek) {<a name="line.443"></a> |
| <span class="sourceLineNo">444</span> reseek(delayedSeekKV);<a name="line.444"></a> |
| <span class="sourceLineNo">445</span> } else {<a name="line.445"></a> |
| <span class="sourceLineNo">446</span> seek(delayedSeekKV);<a name="line.446"></a> |
| <span class="sourceLineNo">447</span> }<a name="line.447"></a> |
| <span class="sourceLineNo">448</span> }<a name="line.448"></a> |
| <span class="sourceLineNo">449</span><a name="line.449"></a> |
| <span class="sourceLineNo">450</span> @Override<a name="line.450"></a> |
| <span class="sourceLineNo">451</span> public boolean isFileScanner() {<a name="line.451"></a> |
| <span class="sourceLineNo">452</span> return true;<a name="line.452"></a> |
| <span class="sourceLineNo">453</span> }<a name="line.453"></a> |
| <span class="sourceLineNo">454</span><a name="line.454"></a> |
| <span class="sourceLineNo">455</span> @Override<a name="line.455"></a> |
| <span class="sourceLineNo">456</span> public Path getFilePath() {<a name="line.456"></a> |
| <span class="sourceLineNo">457</span> return reader.getHFileReader().getPath();<a name="line.457"></a> |
| <span class="sourceLineNo">458</span> }<a name="line.458"></a> |
| <span class="sourceLineNo">459</span><a name="line.459"></a> |
| <span class="sourceLineNo">460</span> // Test methods<a name="line.460"></a> |
| <span class="sourceLineNo">461</span> static final long getSeekCount() {<a name="line.461"></a> |
| <span class="sourceLineNo">462</span> return seekCount.sum();<a name="line.462"></a> |
| <span class="sourceLineNo">463</span> }<a name="line.463"></a> |
| <span class="sourceLineNo">464</span><a name="line.464"></a> |
| <span class="sourceLineNo">465</span> static final void instrument() {<a name="line.465"></a> |
| <span class="sourceLineNo">466</span> seekCount = new LongAdder();<a name="line.466"></a> |
| <span class="sourceLineNo">467</span> }<a name="line.467"></a> |
| <span class="sourceLineNo">468</span><a name="line.468"></a> |
| <span class="sourceLineNo">469</span> @Override<a name="line.469"></a> |
| <span class="sourceLineNo">470</span> public boolean shouldUseScanner(Scan scan, HStore store, long oldestUnexpiredTS) {<a name="line.470"></a> |
| <span class="sourceLineNo">471</span> // if the file has no entries, no need to validate or create a scanner.<a name="line.471"></a> |
| <span class="sourceLineNo">472</span> byte[] cf = store.getColumnFamilyDescriptor().getName();<a name="line.472"></a> |
| <span class="sourceLineNo">473</span> TimeRange timeRange = scan.getColumnFamilyTimeRange().get(cf);<a name="line.473"></a> |
| <span class="sourceLineNo">474</span> if (timeRange == null) {<a name="line.474"></a> |
| <span class="sourceLineNo">475</span> timeRange = scan.getTimeRange();<a name="line.475"></a> |
| <span class="sourceLineNo">476</span> }<a name="line.476"></a> |
| <span class="sourceLineNo">477</span> return reader.passesTimerangeFilter(timeRange, oldestUnexpiredTS)<a name="line.477"></a> |
| <span class="sourceLineNo">478</span> && reader.passesKeyRangeFilter(scan)<a name="line.478"></a> |
| <span class="sourceLineNo">479</span> && reader.passesBloomFilter(scan, scan.getFamilyMap().get(cf));<a name="line.479"></a> |
| <span class="sourceLineNo">480</span> }<a name="line.480"></a> |
| <span class="sourceLineNo">481</span><a name="line.481"></a> |
| <span class="sourceLineNo">482</span> @Override<a name="line.482"></a> |
| <span class="sourceLineNo">483</span> public boolean seekToPreviousRow(Cell originalKey) throws IOException {<a name="line.483"></a> |
| <span class="sourceLineNo">484</span> try {<a name="line.484"></a> |
| <span class="sourceLineNo">485</span> try {<a name="line.485"></a> |
| <span class="sourceLineNo">486</span> boolean keepSeeking = false;<a name="line.486"></a> |
| <span class="sourceLineNo">487</span> Cell key = originalKey;<a name="line.487"></a> |
| <span class="sourceLineNo">488</span> do {<a name="line.488"></a> |
| <span class="sourceLineNo">489</span> Cell seekKey = PrivateCellUtil.createFirstOnRow(key);<a name="line.489"></a> |
| <span class="sourceLineNo">490</span> if (seekCount != null) seekCount.increment();<a name="line.490"></a> |
| <span class="sourceLineNo">491</span> if (!hfs.seekBefore(seekKey)) {<a name="line.491"></a> |
| <span class="sourceLineNo">492</span> this.cur = null;<a name="line.492"></a> |
| <span class="sourceLineNo">493</span> return false;<a name="line.493"></a> |
| <span class="sourceLineNo">494</span> }<a name="line.494"></a> |
| <span class="sourceLineNo">495</span> Cell curCell = hfs.getCell();<a name="line.495"></a> |
| <span class="sourceLineNo">496</span> Cell firstKeyOfPreviousRow = PrivateCellUtil.createFirstOnRow(curCell);<a name="line.496"></a> |
| <span class="sourceLineNo">497</span><a name="line.497"></a> |
| <span class="sourceLineNo">498</span> if (seekCount != null) seekCount.increment();<a name="line.498"></a> |
| <span class="sourceLineNo">499</span> if (!seekAtOrAfter(hfs, firstKeyOfPreviousRow)) {<a name="line.499"></a> |
| <span class="sourceLineNo">500</span> this.cur = null;<a name="line.500"></a> |
| <span class="sourceLineNo">501</span> return false;<a name="line.501"></a> |
| <span class="sourceLineNo">502</span> }<a name="line.502"></a> |
| <span class="sourceLineNo">503</span><a name="line.503"></a> |
| <span class="sourceLineNo">504</span> setCurrentCell(hfs.getCell());<a name="line.504"></a> |
| <span class="sourceLineNo">505</span> this.stopSkippingKVsIfNextRow = true;<a name="line.505"></a> |
| <span class="sourceLineNo">506</span> boolean resultOfSkipKVs;<a name="line.506"></a> |
| <span class="sourceLineNo">507</span> try {<a name="line.507"></a> |
| <span class="sourceLineNo">508</span> resultOfSkipKVs = skipKVsNewerThanReadpoint();<a name="line.508"></a> |
| <span class="sourceLineNo">509</span> } finally {<a name="line.509"></a> |
| <span class="sourceLineNo">510</span> this.stopSkippingKVsIfNextRow = false;<a name="line.510"></a> |
| <span class="sourceLineNo">511</span> }<a name="line.511"></a> |
| <span class="sourceLineNo">512</span> if (!resultOfSkipKVs || getComparator().compareRows(cur, firstKeyOfPreviousRow) > 0) {<a name="line.512"></a> |
| <span class="sourceLineNo">513</span> keepSeeking = true;<a name="line.513"></a> |
| <span class="sourceLineNo">514</span> key = firstKeyOfPreviousRow;<a name="line.514"></a> |
| <span class="sourceLineNo">515</span> continue;<a name="line.515"></a> |
| <span class="sourceLineNo">516</span> } else {<a name="line.516"></a> |
| <span class="sourceLineNo">517</span> keepSeeking = false;<a name="line.517"></a> |
| <span class="sourceLineNo">518</span> }<a name="line.518"></a> |
| <span class="sourceLineNo">519</span> } while (keepSeeking);<a name="line.519"></a> |
| <span class="sourceLineNo">520</span> return true;<a name="line.520"></a> |
| <span class="sourceLineNo">521</span> } finally {<a name="line.521"></a> |
| <span class="sourceLineNo">522</span> realSeekDone = true;<a name="line.522"></a> |
| <span class="sourceLineNo">523</span> }<a name="line.523"></a> |
| <span class="sourceLineNo">524</span> } catch (FileNotFoundException e) {<a name="line.524"></a> |
| <span class="sourceLineNo">525</span> throw e;<a name="line.525"></a> |
| <span class="sourceLineNo">526</span> } catch (IOException ioe) {<a name="line.526"></a> |
| <span class="sourceLineNo">527</span> throw new IOException("Could not seekToPreviousRow " + this + " to key " + originalKey, ioe);<a name="line.527"></a> |
| <span class="sourceLineNo">528</span> }<a name="line.528"></a> |
| <span class="sourceLineNo">529</span> }<a name="line.529"></a> |
| <span class="sourceLineNo">530</span><a name="line.530"></a> |
| <span class="sourceLineNo">531</span> @Override<a name="line.531"></a> |
| <span class="sourceLineNo">532</span> public boolean seekToLastRow() throws IOException {<a name="line.532"></a> |
| <span class="sourceLineNo">533</span> Optional<byte[]> lastRow = reader.getLastRowKey();<a name="line.533"></a> |
| <span class="sourceLineNo">534</span> if (!lastRow.isPresent()) {<a name="line.534"></a> |
| <span class="sourceLineNo">535</span> return false;<a name="line.535"></a> |
| <span class="sourceLineNo">536</span> }<a name="line.536"></a> |
| <span class="sourceLineNo">537</span> Cell seekKey = PrivateCellUtil.createFirstOnRow(lastRow.get());<a name="line.537"></a> |
| <span class="sourceLineNo">538</span> if (seek(seekKey)) {<a name="line.538"></a> |
| <span class="sourceLineNo">539</span> return true;<a name="line.539"></a> |
| <span class="sourceLineNo">540</span> } else {<a name="line.540"></a> |
| <span class="sourceLineNo">541</span> return seekToPreviousRow(seekKey);<a name="line.541"></a> |
| <span class="sourceLineNo">542</span> }<a name="line.542"></a> |
| <span class="sourceLineNo">543</span> }<a name="line.543"></a> |
| <span class="sourceLineNo">544</span><a name="line.544"></a> |
| <span class="sourceLineNo">545</span> @Override<a name="line.545"></a> |
| <span class="sourceLineNo">546</span> public boolean backwardSeek(Cell key) throws IOException {<a name="line.546"></a> |
| <span class="sourceLineNo">547</span> seek(key);<a name="line.547"></a> |
| <span class="sourceLineNo">548</span> if (cur == null || getComparator().compareRows(cur, key) > 0) {<a name="line.548"></a> |
| <span class="sourceLineNo">549</span> return seekToPreviousRow(key);<a name="line.549"></a> |
| <span class="sourceLineNo">550</span> }<a name="line.550"></a> |
| <span class="sourceLineNo">551</span> return true;<a name="line.551"></a> |
| <span class="sourceLineNo">552</span> }<a name="line.552"></a> |
| <span class="sourceLineNo">553</span><a name="line.553"></a> |
| <span class="sourceLineNo">554</span> @Override<a name="line.554"></a> |
| <span class="sourceLineNo">555</span> public Cell getNextIndexedKey() {<a name="line.555"></a> |
| <span class="sourceLineNo">556</span> return hfs.getNextIndexedKey();<a name="line.556"></a> |
| <span class="sourceLineNo">557</span> }<a name="line.557"></a> |
| <span class="sourceLineNo">558</span><a name="line.558"></a> |
| <span class="sourceLineNo">559</span> @Override<a name="line.559"></a> |
| <span class="sourceLineNo">560</span> public void shipped() throws IOException {<a name="line.560"></a> |
| <span class="sourceLineNo">561</span> this.hfs.shipped();<a name="line.561"></a> |
| <span class="sourceLineNo">562</span> }<a name="line.562"></a> |
| <span class="sourceLineNo">563</span>}<a name="line.563"></a> |
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| </pre> |
| </div> |
| </body> |
| </html> |
