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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.io;<a name="line.18"></a> |
| <span class="sourceLineNo">019</span><a name="line.19"></a> |
| <span class="sourceLineNo">020</span>import java.io.IOException;<a name="line.20"></a> |
| <span class="sourceLineNo">021</span>import java.nio.ByteBuffer;<a name="line.21"></a> |
| <span class="sourceLineNo">022</span>import java.util.Optional;<a name="line.22"></a> |
| <span class="sourceLineNo">023</span>import java.util.function.IntConsumer;<a name="line.23"></a> |
| <span class="sourceLineNo">024</span>import org.apache.hadoop.conf.Configuration;<a name="line.24"></a> |
| <span class="sourceLineNo">025</span>import org.apache.hadoop.hbase.Cell;<a name="line.25"></a> |
| <span class="sourceLineNo">026</span>import org.apache.hadoop.hbase.HConstants;<a name="line.26"></a> |
| <span class="sourceLineNo">027</span>import org.apache.hadoop.hbase.KeyValue;<a name="line.27"></a> |
| <span class="sourceLineNo">028</span>import org.apache.hadoop.hbase.PrivateCellUtil;<a name="line.28"></a> |
| <span class="sourceLineNo">029</span>import org.apache.hadoop.hbase.client.Scan;<a name="line.29"></a> |
| <span class="sourceLineNo">030</span>import org.apache.hadoop.hbase.io.hfile.CacheConfig;<a name="line.30"></a> |
| <span class="sourceLineNo">031</span>import org.apache.hadoop.hbase.io.hfile.HFileInfo;<a name="line.31"></a> |
| <span class="sourceLineNo">032</span>import org.apache.hadoop.hbase.io.hfile.HFileScanner;<a name="line.32"></a> |
| <span class="sourceLineNo">033</span>import org.apache.hadoop.hbase.io.hfile.ReaderContext;<a name="line.33"></a> |
| <span class="sourceLineNo">034</span>import org.apache.hadoop.hbase.regionserver.StoreFileInfo;<a name="line.34"></a> |
| <span class="sourceLineNo">035</span>import org.apache.hadoop.hbase.regionserver.StoreFileReader;<a name="line.35"></a> |
| <span class="sourceLineNo">036</span>import org.apache.hadoop.hbase.util.Bytes;<a name="line.36"></a> |
| <span class="sourceLineNo">037</span>import org.apache.yetus.audience.InterfaceAudience;<a name="line.37"></a> |
| <span class="sourceLineNo">038</span>import org.slf4j.Logger;<a name="line.38"></a> |
| <span class="sourceLineNo">039</span>import org.slf4j.LoggerFactory;<a name="line.39"></a> |
| <span class="sourceLineNo">040</span><a name="line.40"></a> |
| <span class="sourceLineNo">041</span>/**<a name="line.41"></a> |
| <span class="sourceLineNo">042</span> * A facade for a {@link org.apache.hadoop.hbase.io.hfile.HFile.Reader} that serves up either the<a name="line.42"></a> |
| <span class="sourceLineNo">043</span> * top or bottom half of a HFile where 'bottom' is the first half of the file containing the keys<a name="line.43"></a> |
| <span class="sourceLineNo">044</span> * that sort lowest and 'top' is the second half of the file with keys that sort greater than those<a name="line.44"></a> |
| <span class="sourceLineNo">045</span> * of the bottom half. The top includes the split files midkey, of the key that follows if it does<a name="line.45"></a> |
| <span class="sourceLineNo">046</span> * not exist in the file.<a name="line.46"></a> |
| <span class="sourceLineNo">047</span> * <p><a name="line.47"></a> |
| <span class="sourceLineNo">048</span> * This type works in tandem with the {@link Reference} type. This class is used reading while<a name="line.48"></a> |
| <span class="sourceLineNo">049</span> * Reference is used writing.<a name="line.49"></a> |
| <span class="sourceLineNo">050</span> * <p><a name="line.50"></a> |
| <span class="sourceLineNo">051</span> * This file is not splitable. Calls to {@link #midKey()} return null.<a name="line.51"></a> |
| <span class="sourceLineNo">052</span> */<a name="line.52"></a> |
| <span class="sourceLineNo">053</span>@InterfaceAudience.Private<a name="line.53"></a> |
| <span class="sourceLineNo">054</span>public class HalfStoreFileReader extends StoreFileReader {<a name="line.54"></a> |
| <span class="sourceLineNo">055</span> private static final Logger LOG = LoggerFactory.getLogger(HalfStoreFileReader.class);<a name="line.55"></a> |
| <span class="sourceLineNo">056</span> final boolean top;<a name="line.56"></a> |
| <span class="sourceLineNo">057</span> // This is the key we split around. Its the first possible entry on a row:<a name="line.57"></a> |
| <span class="sourceLineNo">058</span> // i.e. empty column and a timestamp of LATEST_TIMESTAMP.<a name="line.58"></a> |
| <span class="sourceLineNo">059</span> protected final byte[] splitkey;<a name="line.59"></a> |
| <span class="sourceLineNo">060</span><a name="line.60"></a> |
| <span class="sourceLineNo">061</span> private final Cell splitCell;<a name="line.61"></a> |
| <span class="sourceLineNo">062</span><a name="line.62"></a> |
| <span class="sourceLineNo">063</span> private Optional<Cell> firstKey = Optional.empty();<a name="line.63"></a> |
| <span class="sourceLineNo">064</span><a name="line.64"></a> |
| <span class="sourceLineNo">065</span> private boolean firstKeySeeked = false;<a name="line.65"></a> |
| <span class="sourceLineNo">066</span><a name="line.66"></a> |
| <span class="sourceLineNo">067</span> /**<a name="line.67"></a> |
| <span class="sourceLineNo">068</span> * Creates a half file reader for a hfile referred to by an hfilelink.<a name="line.68"></a> |
| <span class="sourceLineNo">069</span> * @param context Reader context info<a name="line.69"></a> |
| <span class="sourceLineNo">070</span> * @param fileInfo HFile info<a name="line.70"></a> |
| <span class="sourceLineNo">071</span> * @param cacheConf CacheConfig<a name="line.71"></a> |
| <span class="sourceLineNo">072</span> * @param r original reference file (contains top or bottom)<a name="line.72"></a> |
| <span class="sourceLineNo">073</span> * @param conf Configuration<a name="line.73"></a> |
| <span class="sourceLineNo">074</span> */<a name="line.74"></a> |
| <span class="sourceLineNo">075</span> public HalfStoreFileReader(final ReaderContext context, final HFileInfo fileInfo,<a name="line.75"></a> |
| <span class="sourceLineNo">076</span> final CacheConfig cacheConf, final Reference r, StoreFileInfo storeFileInfo,<a name="line.76"></a> |
| <span class="sourceLineNo">077</span> final Configuration conf) throws IOException {<a name="line.77"></a> |
| <span class="sourceLineNo">078</span> super(context, fileInfo, cacheConf, storeFileInfo, conf);<a name="line.78"></a> |
| <span class="sourceLineNo">079</span> // This is not actual midkey for this half-file; its just border<a name="line.79"></a> |
| <span class="sourceLineNo">080</span> // around which we split top and bottom. Have to look in files to find<a name="line.80"></a> |
| <span class="sourceLineNo">081</span> // actual last and first keys for bottom and top halves. Half-files don't<a name="line.81"></a> |
| <span class="sourceLineNo">082</span> // have an actual midkey themselves. No midkey is how we indicate file is<a name="line.82"></a> |
| <span class="sourceLineNo">083</span> // not splittable.<a name="line.83"></a> |
| <span class="sourceLineNo">084</span> this.splitkey = r.getSplitKey();<a name="line.84"></a> |
| <span class="sourceLineNo">085</span> this.splitCell = new KeyValue.KeyOnlyKeyValue(this.splitkey, 0, this.splitkey.length);<a name="line.85"></a> |
| <span class="sourceLineNo">086</span> // Is it top or bottom half?<a name="line.86"></a> |
| <span class="sourceLineNo">087</span> this.top = Reference.isTopFileRegion(r.getFileRegion());<a name="line.87"></a> |
| <span class="sourceLineNo">088</span> }<a name="line.88"></a> |
| <span class="sourceLineNo">089</span><a name="line.89"></a> |
| <span class="sourceLineNo">090</span> protected boolean isTop() {<a name="line.90"></a> |
| <span class="sourceLineNo">091</span> return this.top;<a name="line.91"></a> |
| <span class="sourceLineNo">092</span> }<a name="line.92"></a> |
| <span class="sourceLineNo">093</span><a name="line.93"></a> |
| <span class="sourceLineNo">094</span> @Override<a name="line.94"></a> |
| <span class="sourceLineNo">095</span> public HFileScanner getScanner(final boolean cacheBlocks, final boolean pread,<a name="line.95"></a> |
| <span class="sourceLineNo">096</span> final boolean isCompaction) {<a name="line.96"></a> |
| <span class="sourceLineNo">097</span> final HFileScanner s = super.getScanner(cacheBlocks, pread, isCompaction);<a name="line.97"></a> |
| <span class="sourceLineNo">098</span> return new HFileScanner() {<a name="line.98"></a> |
| <span class="sourceLineNo">099</span> final HFileScanner delegate = s;<a name="line.99"></a> |
| <span class="sourceLineNo">100</span> public boolean atEnd = false;<a name="line.100"></a> |
| <span class="sourceLineNo">101</span><a name="line.101"></a> |
| <span class="sourceLineNo">102</span> @Override<a name="line.102"></a> |
| <span class="sourceLineNo">103</span> public Cell getKey() {<a name="line.103"></a> |
| <span class="sourceLineNo">104</span> if (atEnd) return null;<a name="line.104"></a> |
| <span class="sourceLineNo">105</span> return delegate.getKey();<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> @Override<a name="line.108"></a> |
| <span class="sourceLineNo">109</span> public String getKeyString() {<a name="line.109"></a> |
| <span class="sourceLineNo">110</span> if (atEnd) return null;<a name="line.110"></a> |
| <span class="sourceLineNo">111</span><a name="line.111"></a> |
| <span class="sourceLineNo">112</span> return delegate.getKeyString();<a name="line.112"></a> |
| <span class="sourceLineNo">113</span> }<a name="line.113"></a> |
| <span class="sourceLineNo">114</span><a name="line.114"></a> |
| <span class="sourceLineNo">115</span> @Override<a name="line.115"></a> |
| <span class="sourceLineNo">116</span> public ByteBuffer getValue() {<a name="line.116"></a> |
| <span class="sourceLineNo">117</span> if (atEnd) return null;<a name="line.117"></a> |
| <span class="sourceLineNo">118</span><a name="line.118"></a> |
| <span class="sourceLineNo">119</span> return delegate.getValue();<a name="line.119"></a> |
| <span class="sourceLineNo">120</span> }<a name="line.120"></a> |
| <span class="sourceLineNo">121</span><a name="line.121"></a> |
| <span class="sourceLineNo">122</span> @Override<a name="line.122"></a> |
| <span class="sourceLineNo">123</span> public String getValueString() {<a name="line.123"></a> |
| <span class="sourceLineNo">124</span> if (atEnd) return null;<a name="line.124"></a> |
| <span class="sourceLineNo">125</span><a name="line.125"></a> |
| <span class="sourceLineNo">126</span> return delegate.getValueString();<a name="line.126"></a> |
| <span class="sourceLineNo">127</span> }<a name="line.127"></a> |
| <span class="sourceLineNo">128</span><a name="line.128"></a> |
| <span class="sourceLineNo">129</span> @Override<a name="line.129"></a> |
| <span class="sourceLineNo">130</span> public Cell getCell() {<a name="line.130"></a> |
| <span class="sourceLineNo">131</span> if (atEnd) return null;<a name="line.131"></a> |
| <span class="sourceLineNo">132</span><a name="line.132"></a> |
| <span class="sourceLineNo">133</span> return delegate.getCell();<a name="line.133"></a> |
| <span class="sourceLineNo">134</span> }<a name="line.134"></a> |
| <span class="sourceLineNo">135</span><a name="line.135"></a> |
| <span class="sourceLineNo">136</span> @Override<a name="line.136"></a> |
| <span class="sourceLineNo">137</span> public boolean next() throws IOException {<a name="line.137"></a> |
| <span class="sourceLineNo">138</span> if (atEnd) return false;<a name="line.138"></a> |
| <span class="sourceLineNo">139</span><a name="line.139"></a> |
| <span class="sourceLineNo">140</span> boolean b = delegate.next();<a name="line.140"></a> |
| <span class="sourceLineNo">141</span> if (!b) {<a name="line.141"></a> |
| <span class="sourceLineNo">142</span> return b;<a name="line.142"></a> |
| <span class="sourceLineNo">143</span> }<a name="line.143"></a> |
| <span class="sourceLineNo">144</span> // constrain the bottom.<a name="line.144"></a> |
| <span class="sourceLineNo">145</span> if (!top) {<a name="line.145"></a> |
| <span class="sourceLineNo">146</span> if (getComparator().compare(splitCell, getKey()) <= 0) {<a name="line.146"></a> |
| <span class="sourceLineNo">147</span> atEnd = true;<a name="line.147"></a> |
| <span class="sourceLineNo">148</span> return false;<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> return true;<a name="line.151"></a> |
| <span class="sourceLineNo">152</span> }<a name="line.152"></a> |
| <span class="sourceLineNo">153</span><a name="line.153"></a> |
| <span class="sourceLineNo">154</span> @Override<a name="line.154"></a> |
| <span class="sourceLineNo">155</span> public boolean seekTo() throws IOException {<a name="line.155"></a> |
| <span class="sourceLineNo">156</span> if (top) {<a name="line.156"></a> |
| <span class="sourceLineNo">157</span> int r = this.delegate.seekTo(splitCell);<a name="line.157"></a> |
| <span class="sourceLineNo">158</span> if (r == HConstants.INDEX_KEY_MAGIC) {<a name="line.158"></a> |
| <span class="sourceLineNo">159</span> return true;<a name="line.159"></a> |
| <span class="sourceLineNo">160</span> }<a name="line.160"></a> |
| <span class="sourceLineNo">161</span> if (r < 0) {<a name="line.161"></a> |
| <span class="sourceLineNo">162</span> // midkey is < first key in file<a name="line.162"></a> |
| <span class="sourceLineNo">163</span> return this.delegate.seekTo();<a name="line.163"></a> |
| <span class="sourceLineNo">164</span> }<a name="line.164"></a> |
| <span class="sourceLineNo">165</span> if (r > 0) {<a name="line.165"></a> |
| <span class="sourceLineNo">166</span> return this.delegate.next();<a name="line.166"></a> |
| <span class="sourceLineNo">167</span> }<a name="line.167"></a> |
| <span class="sourceLineNo">168</span> return true;<a name="line.168"></a> |
| <span class="sourceLineNo">169</span> }<a name="line.169"></a> |
| <span class="sourceLineNo">170</span><a name="line.170"></a> |
| <span class="sourceLineNo">171</span> boolean b = delegate.seekTo();<a name="line.171"></a> |
| <span class="sourceLineNo">172</span> if (!b) {<a name="line.172"></a> |
| <span class="sourceLineNo">173</span> return b;<a name="line.173"></a> |
| <span class="sourceLineNo">174</span> }<a name="line.174"></a> |
| <span class="sourceLineNo">175</span> // Check key.<a name="line.175"></a> |
| <span class="sourceLineNo">176</span> return (this.delegate.getReader().getComparator().compare(splitCell, getKey())) > 0;<a name="line.176"></a> |
| <span class="sourceLineNo">177</span> }<a name="line.177"></a> |
| <span class="sourceLineNo">178</span><a name="line.178"></a> |
| <span class="sourceLineNo">179</span> @Override<a name="line.179"></a> |
| <span class="sourceLineNo">180</span> public org.apache.hadoop.hbase.io.hfile.HFile.Reader getReader() {<a name="line.180"></a> |
| <span class="sourceLineNo">181</span> return this.delegate.getReader();<a name="line.181"></a> |
| <span class="sourceLineNo">182</span> }<a name="line.182"></a> |
| <span class="sourceLineNo">183</span><a name="line.183"></a> |
| <span class="sourceLineNo">184</span> @Override<a name="line.184"></a> |
| <span class="sourceLineNo">185</span> public boolean isSeeked() {<a name="line.185"></a> |
| <span class="sourceLineNo">186</span> return this.delegate.isSeeked();<a name="line.186"></a> |
| <span class="sourceLineNo">187</span> }<a name="line.187"></a> |
| <span class="sourceLineNo">188</span><a name="line.188"></a> |
| <span class="sourceLineNo">189</span> @Override<a name="line.189"></a> |
| <span class="sourceLineNo">190</span> public int seekTo(Cell key) throws IOException {<a name="line.190"></a> |
| <span class="sourceLineNo">191</span> if (top) {<a name="line.191"></a> |
| <span class="sourceLineNo">192</span> if (PrivateCellUtil.compareKeyIgnoresMvcc(getComparator(), key, splitCell) < 0) {<a name="line.192"></a> |
| <span class="sourceLineNo">193</span> return -1;<a name="line.193"></a> |
| <span class="sourceLineNo">194</span> }<a name="line.194"></a> |
| <span class="sourceLineNo">195</span> } else {<a name="line.195"></a> |
| <span class="sourceLineNo">196</span> if (PrivateCellUtil.compareKeyIgnoresMvcc(getComparator(), key, splitCell) >= 0) {<a name="line.196"></a> |
| <span class="sourceLineNo">197</span> // we would place the scanner in the second half.<a name="line.197"></a> |
| <span class="sourceLineNo">198</span> // it might be an error to return false here ever...<a name="line.198"></a> |
| <span class="sourceLineNo">199</span> boolean res = delegate.seekBefore(splitCell);<a name="line.199"></a> |
| <span class="sourceLineNo">200</span> if (!res) {<a name="line.200"></a> |
| <span class="sourceLineNo">201</span> throw new IOException(<a name="line.201"></a> |
| <span class="sourceLineNo">202</span> "Seeking for a key in bottom of file, but key exists in top of file, "<a name="line.202"></a> |
| <span class="sourceLineNo">203</span> + "failed on seekBefore(midkey)");<a name="line.203"></a> |
| <span class="sourceLineNo">204</span> }<a name="line.204"></a> |
| <span class="sourceLineNo">205</span> return 1;<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> return delegate.seekTo(key);<a name="line.208"></a> |
| <span class="sourceLineNo">209</span> }<a name="line.209"></a> |
| <span class="sourceLineNo">210</span><a name="line.210"></a> |
| <span class="sourceLineNo">211</span> @Override<a name="line.211"></a> |
| <span class="sourceLineNo">212</span> public int reseekTo(Cell key) throws IOException {<a name="line.212"></a> |
| <span class="sourceLineNo">213</span> // This function is identical to the corresponding seekTo function<a name="line.213"></a> |
| <span class="sourceLineNo">214</span> // except<a name="line.214"></a> |
| <span class="sourceLineNo">215</span> // that we call reseekTo (and not seekTo) on the delegate.<a name="line.215"></a> |
| <span class="sourceLineNo">216</span> if (top) {<a name="line.216"></a> |
| <span class="sourceLineNo">217</span> if (PrivateCellUtil.compareKeyIgnoresMvcc(getComparator(), key, splitCell) < 0) {<a name="line.217"></a> |
| <span class="sourceLineNo">218</span> return -1;<a name="line.218"></a> |
| <span class="sourceLineNo">219</span> }<a name="line.219"></a> |
| <span class="sourceLineNo">220</span> } else {<a name="line.220"></a> |
| <span class="sourceLineNo">221</span> if (PrivateCellUtil.compareKeyIgnoresMvcc(getComparator(), key, splitCell) >= 0) {<a name="line.221"></a> |
| <span class="sourceLineNo">222</span> // we would place the scanner in the second half.<a name="line.222"></a> |
| <span class="sourceLineNo">223</span> // it might be an error to return false here ever...<a name="line.223"></a> |
| <span class="sourceLineNo">224</span> boolean res = delegate.seekBefore(splitCell);<a name="line.224"></a> |
| <span class="sourceLineNo">225</span> if (!res) {<a name="line.225"></a> |
| <span class="sourceLineNo">226</span> throw new IOException("Seeking for a key in bottom of file, but"<a name="line.226"></a> |
| <span class="sourceLineNo">227</span> + " key exists in top of file, failed on seekBefore(midkey)");<a name="line.227"></a> |
| <span class="sourceLineNo">228</span> }<a name="line.228"></a> |
| <span class="sourceLineNo">229</span> return 1;<a name="line.229"></a> |
| <span class="sourceLineNo">230</span> }<a name="line.230"></a> |
| <span class="sourceLineNo">231</span> }<a name="line.231"></a> |
| <span class="sourceLineNo">232</span> if (atEnd) {<a name="line.232"></a> |
| <span class="sourceLineNo">233</span> // skip the 'reseek' and just return 1.<a name="line.233"></a> |
| <span class="sourceLineNo">234</span> return 1;<a name="line.234"></a> |
| <span class="sourceLineNo">235</span> }<a name="line.235"></a> |
| <span class="sourceLineNo">236</span> return delegate.reseekTo(key);<a name="line.236"></a> |
| <span class="sourceLineNo">237</span> }<a name="line.237"></a> |
| <span class="sourceLineNo">238</span><a name="line.238"></a> |
| <span class="sourceLineNo">239</span> @Override<a name="line.239"></a> |
| <span class="sourceLineNo">240</span> public boolean seekBefore(Cell key) throws IOException {<a name="line.240"></a> |
| <span class="sourceLineNo">241</span> if (top) {<a name="line.241"></a> |
| <span class="sourceLineNo">242</span> Optional<Cell> fk = getFirstKey();<a name="line.242"></a> |
| <span class="sourceLineNo">243</span> if (<a name="line.243"></a> |
| <span class="sourceLineNo">244</span> fk.isPresent()<a name="line.244"></a> |
| <span class="sourceLineNo">245</span> && PrivateCellUtil.compareKeyIgnoresMvcc(getComparator(), key, fk.get()) <= 0<a name="line.245"></a> |
| <span class="sourceLineNo">246</span> ) {<a name="line.246"></a> |
| <span class="sourceLineNo">247</span> return false;<a name="line.247"></a> |
| <span class="sourceLineNo">248</span> }<a name="line.248"></a> |
| <span class="sourceLineNo">249</span> } else {<a name="line.249"></a> |
| <span class="sourceLineNo">250</span> // The equals sign isn't strictly necessary just here to be consistent<a name="line.250"></a> |
| <span class="sourceLineNo">251</span> // with seekTo<a name="line.251"></a> |
| <span class="sourceLineNo">252</span> if (PrivateCellUtil.compareKeyIgnoresMvcc(getComparator(), key, splitCell) >= 0) {<a name="line.252"></a> |
| <span class="sourceLineNo">253</span> boolean ret = this.delegate.seekBefore(splitCell);<a name="line.253"></a> |
| <span class="sourceLineNo">254</span> if (ret) {<a name="line.254"></a> |
| <span class="sourceLineNo">255</span> atEnd = false;<a name="line.255"></a> |
| <span class="sourceLineNo">256</span> }<a name="line.256"></a> |
| <span class="sourceLineNo">257</span> return ret;<a name="line.257"></a> |
| <span class="sourceLineNo">258</span> }<a name="line.258"></a> |
| <span class="sourceLineNo">259</span> }<a name="line.259"></a> |
| <span class="sourceLineNo">260</span> boolean ret = this.delegate.seekBefore(key);<a name="line.260"></a> |
| <span class="sourceLineNo">261</span> if (ret) {<a name="line.261"></a> |
| <span class="sourceLineNo">262</span> atEnd = false;<a name="line.262"></a> |
| <span class="sourceLineNo">263</span> }<a name="line.263"></a> |
| <span class="sourceLineNo">264</span> return ret;<a name="line.264"></a> |
| <span class="sourceLineNo">265</span> }<a name="line.265"></a> |
| <span class="sourceLineNo">266</span><a name="line.266"></a> |
| <span class="sourceLineNo">267</span> @Override<a name="line.267"></a> |
| <span class="sourceLineNo">268</span> public Cell getNextIndexedKey() {<a name="line.268"></a> |
| <span class="sourceLineNo">269</span> return null;<a name="line.269"></a> |
| <span class="sourceLineNo">270</span> }<a name="line.270"></a> |
| <span class="sourceLineNo">271</span><a name="line.271"></a> |
| <span class="sourceLineNo">272</span> @Override<a name="line.272"></a> |
| <span class="sourceLineNo">273</span> public void close() {<a name="line.273"></a> |
| <span class="sourceLineNo">274</span> this.delegate.close();<a name="line.274"></a> |
| <span class="sourceLineNo">275</span> }<a name="line.275"></a> |
| <span class="sourceLineNo">276</span><a name="line.276"></a> |
| <span class="sourceLineNo">277</span> @Override<a name="line.277"></a> |
| <span class="sourceLineNo">278</span> public void shipped() throws IOException {<a name="line.278"></a> |
| <span class="sourceLineNo">279</span> this.delegate.shipped();<a name="line.279"></a> |
| <span class="sourceLineNo">280</span> }<a name="line.280"></a> |
| <span class="sourceLineNo">281</span><a name="line.281"></a> |
| <span class="sourceLineNo">282</span> @Override<a name="line.282"></a> |
| <span class="sourceLineNo">283</span> public void recordBlockSize(IntConsumer blockSizeConsumer) {<a name="line.283"></a> |
| <span class="sourceLineNo">284</span> this.delegate.recordBlockSize(blockSizeConsumer);<a name="line.284"></a> |
| <span class="sourceLineNo">285</span> }<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><a name="line.288"></a> |
| <span class="sourceLineNo">289</span> @Override<a name="line.289"></a> |
| <span class="sourceLineNo">290</span> public boolean passesKeyRangeFilter(Scan scan) {<a name="line.290"></a> |
| <span class="sourceLineNo">291</span> return true;<a name="line.291"></a> |
| <span class="sourceLineNo">292</span> }<a name="line.292"></a> |
| <span class="sourceLineNo">293</span><a name="line.293"></a> |
| <span class="sourceLineNo">294</span> @Override<a name="line.294"></a> |
| <span class="sourceLineNo">295</span> public Optional<Cell> getLastKey() {<a name="line.295"></a> |
| <span class="sourceLineNo">296</span> if (top) {<a name="line.296"></a> |
| <span class="sourceLineNo">297</span> return super.getLastKey();<a name="line.297"></a> |
| <span class="sourceLineNo">298</span> }<a name="line.298"></a> |
| <span class="sourceLineNo">299</span> // Get a scanner that caches the block and that uses pread.<a name="line.299"></a> |
| <span class="sourceLineNo">300</span> HFileScanner scanner = getScanner(true, true);<a name="line.300"></a> |
| <span class="sourceLineNo">301</span> try {<a name="line.301"></a> |
| <span class="sourceLineNo">302</span> if (scanner.seekBefore(this.splitCell)) {<a name="line.302"></a> |
| <span class="sourceLineNo">303</span> return Optional.ofNullable(scanner.getKey());<a name="line.303"></a> |
| <span class="sourceLineNo">304</span> }<a name="line.304"></a> |
| <span class="sourceLineNo">305</span> } catch (IOException e) {<a name="line.305"></a> |
| <span class="sourceLineNo">306</span> LOG.warn("Failed seekBefore " + Bytes.toStringBinary(this.splitkey), e);<a name="line.306"></a> |
| <span class="sourceLineNo">307</span> } finally {<a name="line.307"></a> |
| <span class="sourceLineNo">308</span> if (scanner != null) {<a name="line.308"></a> |
| <span class="sourceLineNo">309</span> scanner.close();<a name="line.309"></a> |
| <span class="sourceLineNo">310</span> }<a name="line.310"></a> |
| <span class="sourceLineNo">311</span> }<a name="line.311"></a> |
| <span class="sourceLineNo">312</span> return Optional.empty();<a name="line.312"></a> |
| <span class="sourceLineNo">313</span> }<a name="line.313"></a> |
| <span class="sourceLineNo">314</span><a name="line.314"></a> |
| <span class="sourceLineNo">315</span> @Override<a name="line.315"></a> |
| <span class="sourceLineNo">316</span> public Optional<Cell> midKey() throws IOException {<a name="line.316"></a> |
| <span class="sourceLineNo">317</span> // Returns null to indicate file is not splitable.<a name="line.317"></a> |
| <span class="sourceLineNo">318</span> return Optional.empty();<a name="line.318"></a> |
| <span class="sourceLineNo">319</span> }<a name="line.319"></a> |
| <span class="sourceLineNo">320</span><a name="line.320"></a> |
| <span class="sourceLineNo">321</span> @Override<a name="line.321"></a> |
| <span class="sourceLineNo">322</span> public Optional<Cell> getFirstKey() {<a name="line.322"></a> |
| <span class="sourceLineNo">323</span> if (!firstKeySeeked) {<a name="line.323"></a> |
| <span class="sourceLineNo">324</span> HFileScanner scanner = getScanner(true, true, false);<a name="line.324"></a> |
| <span class="sourceLineNo">325</span> try {<a name="line.325"></a> |
| <span class="sourceLineNo">326</span> if (scanner.seekTo()) {<a name="line.326"></a> |
| <span class="sourceLineNo">327</span> this.firstKey = Optional.ofNullable(scanner.getKey());<a name="line.327"></a> |
| <span class="sourceLineNo">328</span> }<a name="line.328"></a> |
| <span class="sourceLineNo">329</span> firstKeySeeked = true;<a name="line.329"></a> |
| <span class="sourceLineNo">330</span> } catch (IOException e) {<a name="line.330"></a> |
| <span class="sourceLineNo">331</span> LOG.warn("Failed seekTo first KV in the file", e);<a name="line.331"></a> |
| <span class="sourceLineNo">332</span> } finally {<a name="line.332"></a> |
| <span class="sourceLineNo">333</span> if (scanner != null) {<a name="line.333"></a> |
| <span class="sourceLineNo">334</span> scanner.close();<a name="line.334"></a> |
| <span class="sourceLineNo">335</span> }<a name="line.335"></a> |
| <span class="sourceLineNo">336</span> }<a name="line.336"></a> |
| <span class="sourceLineNo">337</span> }<a name="line.337"></a> |
| <span class="sourceLineNo">338</span> return this.firstKey;<a name="line.338"></a> |
| <span class="sourceLineNo">339</span> }<a name="line.339"></a> |
| <span class="sourceLineNo">340</span><a name="line.340"></a> |
| <span class="sourceLineNo">341</span> @Override<a name="line.341"></a> |
| <span class="sourceLineNo">342</span> public long getEntries() {<a name="line.342"></a> |
| <span class="sourceLineNo">343</span> // Estimate the number of entries as half the original file; this may be wildly inaccurate.<a name="line.343"></a> |
| <span class="sourceLineNo">344</span> return super.getEntries() / 2;<a name="line.344"></a> |
| <span class="sourceLineNo">345</span> }<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 getFilterEntries() {<a name="line.348"></a> |
| <span class="sourceLineNo">349</span> // Estimate the number of entries as half the original file; this may be wildly inaccurate.<a name="line.349"></a> |
| <span class="sourceLineNo">350</span> return super.getFilterEntries() / 2;<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> |
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| </pre> |
| </div> |
| </body> |
| </html> |
