Google Git
Sign in
apache / hbase-site / 2e3aaee18b357604e6f6797bafb8e59d3025ccb0 / . / devapidocs / src-html / org / apache / hadoop / hbase / regionserver / MemStoreCompactor.html
blob: 39cbc4ee93299985b10b4e3a4934345d06b28a9c [file] [log] [blame]
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html lang="en">
<head>
<title>Source code</title>
<link rel="stylesheet" type="text/css" href="../../../../../../stylesheet.css" title="Style">
</head>
<body>
<div class="sourceContainer">
<pre><span class="sourceLineNo">001</span>/**<a name="line.1"></a>
<span class="sourceLineNo">002</span> *<a name="line.2"></a>
<span class="sourceLineNo">003</span> * Licensed to the Apache Software Foundation (ASF) under one<a name="line.3"></a>
<span class="sourceLineNo">004</span> * or more contributor license agreements. See the NOTICE file<a name="line.4"></a>
<span class="sourceLineNo">005</span> * distributed with this work for additional information<a name="line.5"></a>
<span class="sourceLineNo">006</span> * regarding copyright ownership. The ASF licenses this file<a name="line.6"></a>
<span class="sourceLineNo">007</span> * to you under the Apache License, Version 2.0 (the<a name="line.7"></a>
<span class="sourceLineNo">008</span> * "License"); you may not use this file except in compliance<a name="line.8"></a>
<span class="sourceLineNo">009</span> * with the License. You may obtain a copy of the License at<a name="line.9"></a>
<span class="sourceLineNo">010</span> *<a name="line.10"></a>
<span class="sourceLineNo">011</span> * http://www.apache.org/licenses/LICENSE-2.0<a name="line.11"></a>
<span class="sourceLineNo">012</span> *<a name="line.12"></a>
<span class="sourceLineNo">013</span> * Unless required by applicable law or agreed to in writing, software<a name="line.13"></a>
<span class="sourceLineNo">014</span> * distributed under the License is distributed on an "AS IS" BASIS,<a name="line.14"></a>
<span class="sourceLineNo">015</span> * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.<a name="line.15"></a>
<span class="sourceLineNo">016</span> * See the License for the specific language governing permissions and<a name="line.16"></a>
<span class="sourceLineNo">017</span> * limitations under the License.<a name="line.17"></a>
<span class="sourceLineNo">018</span> */<a name="line.18"></a>
<span class="sourceLineNo">019</span>package org.apache.hadoop.hbase.regionserver;<a name="line.19"></a>
<span class="sourceLineNo">020</span><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.List;<a name="line.22"></a>
<span class="sourceLineNo">023</span>import java.util.concurrent.atomic.AtomicBoolean;<a name="line.23"></a>
<span class="sourceLineNo">024</span><a name="line.24"></a>
<span class="sourceLineNo">025</span>import org.apache.hadoop.conf.Configuration;<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.MemoryCompactionPolicy;<a name="line.27"></a>
<span class="sourceLineNo">028</span>import org.apache.hadoop.hbase.exceptions.IllegalArgumentIOException;<a name="line.28"></a>
<span class="sourceLineNo">029</span>import org.apache.hadoop.hbase.util.Bytes;<a name="line.29"></a>
<span class="sourceLineNo">030</span>import org.apache.hadoop.hbase.util.ClassSize;<a name="line.30"></a>
<span class="sourceLineNo">031</span>import org.apache.yetus.audience.InterfaceAudience;<a name="line.31"></a>
<span class="sourceLineNo">032</span>import org.slf4j.Logger;<a name="line.32"></a>
<span class="sourceLineNo">033</span>import org.slf4j.LoggerFactory;<a name="line.33"></a>
<span class="sourceLineNo">034</span><a name="line.34"></a>
<span class="sourceLineNo">035</span>import org.apache.hbase.thirdparty.com.google.common.annotations.VisibleForTesting;<a name="line.35"></a>
<span class="sourceLineNo">036</span><a name="line.36"></a>
<span class="sourceLineNo">037</span>/**<a name="line.37"></a>
<span class="sourceLineNo">038</span> * The ongoing MemStore Compaction manager, dispatches a solo running compaction and interrupts<a name="line.38"></a>
<span class="sourceLineNo">039</span> * the compaction if requested. The compaction is interrupted and stopped by CompactingMemStore,<a name="line.39"></a>
<span class="sourceLineNo">040</span> * for example when another compaction needs to be started.<a name="line.40"></a>
<span class="sourceLineNo">041</span> * Prior to compaction the MemStoreCompactor evaluates<a name="line.41"></a>
<span class="sourceLineNo">042</span> * the compacting ratio and aborts the compaction if it is not worthy.<a name="line.42"></a>
<span class="sourceLineNo">043</span> * The MemStoreScanner is used to traverse the compaction pipeline. The MemStoreScanner<a name="line.43"></a>
<span class="sourceLineNo">044</span> * is included in internal store scanner, where all compaction logic is implemented.<a name="line.44"></a>
<span class="sourceLineNo">045</span> * Threads safety: It is assumed that the compaction pipeline is immutable,<a name="line.45"></a>
<span class="sourceLineNo">046</span> * therefore no special synchronization is required.<a name="line.46"></a>
<span class="sourceLineNo">047</span> */<a name="line.47"></a>
<span class="sourceLineNo">048</span>@InterfaceAudience.Private<a name="line.48"></a>
<span class="sourceLineNo">049</span>public class MemStoreCompactor {<a name="line.49"></a>
<span class="sourceLineNo">050</span><a name="line.50"></a>
<span class="sourceLineNo">051</span> public static final long DEEP_OVERHEAD = ClassSize<a name="line.51"></a>
<span class="sourceLineNo">052</span> .align(ClassSize.OBJECT + 4 * ClassSize.REFERENCE<a name="line.52"></a>
<span class="sourceLineNo">053</span> // compactingMemStore, versionedList, isInterrupted, strategy (the reference)<a name="line.53"></a>
<span class="sourceLineNo">054</span> // "action" is an enum and thus it is a class with static final constants,<a name="line.54"></a>
<span class="sourceLineNo">055</span> // so counting only the size of the reference to it and not the size of the internals<a name="line.55"></a>
<span class="sourceLineNo">056</span> + Bytes.SIZEOF_INT // compactionKVMax<a name="line.56"></a>
<span class="sourceLineNo">057</span> + ClassSize.ATOMIC_BOOLEAN // isInterrupted (the internals)<a name="line.57"></a>
<span class="sourceLineNo">058</span> );<a name="line.58"></a>
<span class="sourceLineNo">059</span><a name="line.59"></a>
<span class="sourceLineNo">060</span> private static final Logger LOG = LoggerFactory.getLogger(MemStoreCompactor.class);<a name="line.60"></a>
<span class="sourceLineNo">061</span> private CompactingMemStore compactingMemStore;<a name="line.61"></a>
<span class="sourceLineNo">062</span><a name="line.62"></a>
<span class="sourceLineNo">063</span> // a static version of the segment list from the pipeline<a name="line.63"></a>
<span class="sourceLineNo">064</span> private VersionedSegmentsList versionedList;<a name="line.64"></a>
<span class="sourceLineNo">065</span><a name="line.65"></a>
<span class="sourceLineNo">066</span> // a flag raised when compaction is requested to stop<a name="line.66"></a>
<span class="sourceLineNo">067</span> private final AtomicBoolean isInterrupted = new AtomicBoolean(false);<a name="line.67"></a>
<span class="sourceLineNo">068</span><a name="line.68"></a>
<span class="sourceLineNo">069</span> // the limit to the size of the groups to be later provided to MemStoreSegmentsIterator<a name="line.69"></a>
<span class="sourceLineNo">070</span> private final int compactionKVMax;<a name="line.70"></a>
<span class="sourceLineNo">071</span><a name="line.71"></a>
<span class="sourceLineNo">072</span> private MemStoreCompactionStrategy strategy;<a name="line.72"></a>
<span class="sourceLineNo">073</span><a name="line.73"></a>
<span class="sourceLineNo">074</span> public MemStoreCompactor(CompactingMemStore compactingMemStore,<a name="line.74"></a>
<span class="sourceLineNo">075</span> MemoryCompactionPolicy compactionPolicy) throws IllegalArgumentIOException {<a name="line.75"></a>
<span class="sourceLineNo">076</span> this.compactingMemStore = compactingMemStore;<a name="line.76"></a>
<span class="sourceLineNo">077</span> this.compactionKVMax = compactingMemStore.getConfiguration()<a name="line.77"></a>
<span class="sourceLineNo">078</span> .getInt(HConstants.COMPACTION_KV_MAX, HConstants.COMPACTION_KV_MAX_DEFAULT);<a name="line.78"></a>
<span class="sourceLineNo">079</span> initiateCompactionStrategy(compactionPolicy, compactingMemStore.getConfiguration(),<a name="line.79"></a>
<span class="sourceLineNo">080</span> compactingMemStore.getFamilyName());<a name="line.80"></a>
<span class="sourceLineNo">081</span> }<a name="line.81"></a>
<span class="sourceLineNo">082</span><a name="line.82"></a>
<span class="sourceLineNo">083</span> @Override<a name="line.83"></a>
<span class="sourceLineNo">084</span> public String toString() {<a name="line.84"></a>
<span class="sourceLineNo">085</span> return this.strategy + ", compactionCellMax=" + this.compactionKVMax;<a name="line.85"></a>
<span class="sourceLineNo">086</span> }<a name="line.86"></a>
<span class="sourceLineNo">087</span><a name="line.87"></a>
<span class="sourceLineNo">088</span> /**----------------------------------------------------------------------<a name="line.88"></a>
<span class="sourceLineNo">089</span> * The request to dispatch the compaction asynchronous task.<a name="line.89"></a>
<span class="sourceLineNo">090</span> * The method returns true if compaction was successfully dispatched, or false if there<a name="line.90"></a>
<span class="sourceLineNo">091</span> * is already an ongoing compaction or no segments to compact.<a name="line.91"></a>
<span class="sourceLineNo">092</span> */<a name="line.92"></a>
<span class="sourceLineNo">093</span> public boolean start() throws IOException {<a name="line.93"></a>
<span class="sourceLineNo">094</span> if (!compactingMemStore.hasImmutableSegments()) { // no compaction on empty pipeline<a name="line.94"></a>
<span class="sourceLineNo">095</span> return false;<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> // get a snapshot of the list of the segments from the pipeline,<a name="line.98"></a>
<span class="sourceLineNo">099</span> // this local copy of the list is marked with specific version<a name="line.99"></a>
<span class="sourceLineNo">100</span> versionedList = compactingMemStore.getImmutableSegments();<a name="line.100"></a>
<span class="sourceLineNo">101</span> LOG.trace("Speculative compaction starting on {}/{}",<a name="line.101"></a>
<span class="sourceLineNo">102</span> compactingMemStore.getStore().getHRegion().getRegionInfo().getEncodedName(),<a name="line.102"></a>
<span class="sourceLineNo">103</span> compactingMemStore.getStore().getColumnFamilyName());<a name="line.103"></a>
<span class="sourceLineNo">104</span> HStore store = compactingMemStore.getStore();<a name="line.104"></a>
<span class="sourceLineNo">105</span> RegionCoprocessorHost cpHost = store.getCoprocessorHost();<a name="line.105"></a>
<span class="sourceLineNo">106</span> if (cpHost != null) {<a name="line.106"></a>
<span class="sourceLineNo">107</span> cpHost.preMemStoreCompaction(store);<a name="line.107"></a>
<span class="sourceLineNo">108</span> }<a name="line.108"></a>
<span class="sourceLineNo">109</span> try {<a name="line.109"></a>
<span class="sourceLineNo">110</span> doCompaction();<a name="line.110"></a>
<span class="sourceLineNo">111</span> } finally {<a name="line.111"></a>
<span class="sourceLineNo">112</span> if (cpHost != null) {<a name="line.112"></a>
<span class="sourceLineNo">113</span> cpHost.postMemStoreCompaction(store);<a name="line.113"></a>
<span class="sourceLineNo">114</span> }<a name="line.114"></a>
<span class="sourceLineNo">115</span> }<a name="line.115"></a>
<span class="sourceLineNo">116</span> return true;<a name="line.116"></a>
<span class="sourceLineNo">117</span> }<a name="line.117"></a>
<span class="sourceLineNo">118</span><a name="line.118"></a>
<span class="sourceLineNo">119</span> /**----------------------------------------------------------------------<a name="line.119"></a>
<span class="sourceLineNo">120</span> * The request to cancel the compaction asynchronous task<a name="line.120"></a>
<span class="sourceLineNo">121</span> * The compaction may still happen if the request was sent too late<a name="line.121"></a>
<span class="sourceLineNo">122</span> * Non-blocking request<a name="line.122"></a>
<span class="sourceLineNo">123</span> */<a name="line.123"></a>
<span class="sourceLineNo">124</span> public void stop() {<a name="line.124"></a>
<span class="sourceLineNo">125</span> isInterrupted.compareAndSet(false, true);<a name="line.125"></a>
<span class="sourceLineNo">126</span> }<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> public void resetStats() {<a name="line.129"></a>
<span class="sourceLineNo">130</span> strategy.resetStats();<a name="line.130"></a>
<span class="sourceLineNo">131</span> }<a name="line.131"></a>
<span class="sourceLineNo">132</span><a name="line.132"></a>
<span class="sourceLineNo">133</span> /**----------------------------------------------------------------------<a name="line.133"></a>
<span class="sourceLineNo">134</span> * Reset the interruption indicator and clear the pointers in order to allow good<a name="line.134"></a>
<span class="sourceLineNo">135</span> * garbage collection<a name="line.135"></a>
<span class="sourceLineNo">136</span> */<a name="line.136"></a>
<span class="sourceLineNo">137</span> private void releaseResources() {<a name="line.137"></a>
<span class="sourceLineNo">138</span> isInterrupted.set(false);<a name="line.138"></a>
<span class="sourceLineNo">139</span> versionedList = null;<a name="line.139"></a>
<span class="sourceLineNo">140</span> }<a name="line.140"></a>
<span class="sourceLineNo">141</span><a name="line.141"></a>
<span class="sourceLineNo">142</span> /**----------------------------------------------------------------------<a name="line.142"></a>
<span class="sourceLineNo">143</span> * The worker thread performs the compaction asynchronously.<a name="line.143"></a>
<span class="sourceLineNo">144</span> * The solo (per compactor) thread only reads the compaction pipeline.<a name="line.144"></a>
<span class="sourceLineNo">145</span> * There is at most one thread per memstore instance.<a name="line.145"></a>
<span class="sourceLineNo">146</span> */<a name="line.146"></a>
<span class="sourceLineNo">147</span> private void doCompaction() {<a name="line.147"></a>
<span class="sourceLineNo">148</span> ImmutableSegment result = null;<a name="line.148"></a>
<span class="sourceLineNo">149</span> boolean resultSwapped = false;<a name="line.149"></a>
<span class="sourceLineNo">150</span> MemStoreCompactionStrategy.Action nextStep = strategy.getAction(versionedList);<a name="line.150"></a>
<span class="sourceLineNo">151</span> boolean merge = (nextStep == MemStoreCompactionStrategy.Action.MERGE ||<a name="line.151"></a>
<span class="sourceLineNo">152</span> nextStep == MemStoreCompactionStrategy.Action.MERGE_COUNT_UNIQUE_KEYS);<a name="line.152"></a>
<span class="sourceLineNo">153</span> try {<a name="line.153"></a>
<span class="sourceLineNo">154</span> if (isInterrupted.get()) { // if the entire process is interrupted cancel flattening<a name="line.154"></a>
<span class="sourceLineNo">155</span> return; // the compaction also doesn't start when interrupted<a name="line.155"></a>
<span class="sourceLineNo">156</span> }<a name="line.156"></a>
<span class="sourceLineNo">157</span><a name="line.157"></a>
<span class="sourceLineNo">158</span> if (nextStep == MemStoreCompactionStrategy.Action.NOOP) {<a name="line.158"></a>
<span class="sourceLineNo">159</span> return;<a name="line.159"></a>
<span class="sourceLineNo">160</span> }<a name="line.160"></a>
<span class="sourceLineNo">161</span> if (nextStep == MemStoreCompactionStrategy.Action.FLATTEN<a name="line.161"></a>
<span class="sourceLineNo">162</span> || nextStep == MemStoreCompactionStrategy.Action.FLATTEN_COUNT_UNIQUE_KEYS) {<a name="line.162"></a>
<span class="sourceLineNo">163</span> // some Segment in the pipeline is with SkipList index, make it flat<a name="line.163"></a>
<span class="sourceLineNo">164</span> compactingMemStore.flattenOneSegment(versionedList.getVersion(), nextStep);<a name="line.164"></a>
<span class="sourceLineNo">165</span> return;<a name="line.165"></a>
<span class="sourceLineNo">166</span> }<a name="line.166"></a>
<span class="sourceLineNo">167</span><a name="line.167"></a>
<span class="sourceLineNo">168</span> // Create one segment representing all segments in the compaction pipeline,<a name="line.168"></a>
<span class="sourceLineNo">169</span> // either by compaction or by merge<a name="line.169"></a>
<span class="sourceLineNo">170</span> if (!isInterrupted.get()) {<a name="line.170"></a>
<span class="sourceLineNo">171</span> result = createSubstitution(nextStep);<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> // Substitute the pipeline with one segment<a name="line.174"></a>
<span class="sourceLineNo">175</span> if (!isInterrupted.get()) {<a name="line.175"></a>
<span class="sourceLineNo">176</span> resultSwapped = compactingMemStore.swapCompactedSegments(versionedList, result, merge);<a name="line.176"></a>
<span class="sourceLineNo">177</span> if (resultSwapped) {<a name="line.177"></a>
<span class="sourceLineNo">178</span> // update compaction strategy<a name="line.178"></a>
<span class="sourceLineNo">179</span> strategy.updateStats(result);<a name="line.179"></a>
<span class="sourceLineNo">180</span> // update the wal so it can be truncated and not get too long<a name="line.180"></a>
<span class="sourceLineNo">181</span> compactingMemStore.updateLowestUnflushedSequenceIdInWAL(true); // only if greater<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> } catch (IOException e) {<a name="line.184"></a>
<span class="sourceLineNo">185</span> LOG.trace("Interrupting in-memory compaction for store={}",<a name="line.185"></a>
<span class="sourceLineNo">186</span> compactingMemStore.getFamilyName());<a name="line.186"></a>
<span class="sourceLineNo">187</span> Thread.currentThread().interrupt();<a name="line.187"></a>
<span class="sourceLineNo">188</span> } finally {<a name="line.188"></a>
<span class="sourceLineNo">189</span> // For the MERGE case, if the result was created, but swap didn't happen,<a name="line.189"></a>
<span class="sourceLineNo">190</span> // we DON'T need to close the result segment (meaning its MSLAB)!<a name="line.190"></a>
<span class="sourceLineNo">191</span> // Because closing the result segment means closing the chunks of all segments<a name="line.191"></a>
<span class="sourceLineNo">192</span> // in the compaction pipeline, which still have ongoing scans.<a name="line.192"></a>
<span class="sourceLineNo">193</span> if (!merge &amp;&amp; (result != null) &amp;&amp; !resultSwapped) {<a name="line.193"></a>
<span class="sourceLineNo">194</span> result.close();<a name="line.194"></a>
<span class="sourceLineNo">195</span> }<a name="line.195"></a>
<span class="sourceLineNo">196</span> releaseResources();<a name="line.196"></a>
<span class="sourceLineNo">197</span> compactingMemStore.setInMemoryCompactionCompleted();<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> }<a name="line.200"></a>
<span class="sourceLineNo">201</span><a name="line.201"></a>
<span class="sourceLineNo">202</span> /**----------------------------------------------------------------------<a name="line.202"></a>
<span class="sourceLineNo">203</span> * Creation of the ImmutableSegment either by merge or copy-compact of the segments of the<a name="line.203"></a>
<span class="sourceLineNo">204</span> * pipeline, based on the Compactor Iterator. The new ImmutableSegment is returned.<a name="line.204"></a>
<span class="sourceLineNo">205</span> */<a name="line.205"></a>
<span class="sourceLineNo">206</span> private ImmutableSegment createSubstitution(MemStoreCompactionStrategy.Action action) throws<a name="line.206"></a>
<span class="sourceLineNo">207</span> IOException {<a name="line.207"></a>
<span class="sourceLineNo">208</span><a name="line.208"></a>
<span class="sourceLineNo">209</span> ImmutableSegment result = null;<a name="line.209"></a>
<span class="sourceLineNo">210</span> MemStoreSegmentsIterator iterator = null;<a name="line.210"></a>
<span class="sourceLineNo">211</span> List&lt;ImmutableSegment&gt; segments = versionedList.getStoreSegments();<a name="line.211"></a>
<span class="sourceLineNo">212</span> for (ImmutableSegment s : segments) {<a name="line.212"></a>
<span class="sourceLineNo">213</span> s.waitForUpdates(); // to ensure all updates preceding s in-memory flush have completed<a name="line.213"></a>
<span class="sourceLineNo">214</span> }<a name="line.214"></a>
<span class="sourceLineNo">215</span><a name="line.215"></a>
<span class="sourceLineNo">216</span> switch (action) {<a name="line.216"></a>
<span class="sourceLineNo">217</span> case COMPACT:<a name="line.217"></a>
<span class="sourceLineNo">218</span> iterator = new MemStoreCompactorSegmentsIterator(segments,<a name="line.218"></a>
<span class="sourceLineNo">219</span> compactingMemStore.getComparator(),<a name="line.219"></a>
<span class="sourceLineNo">220</span> compactionKVMax, compactingMemStore.getStore());<a name="line.220"></a>
<span class="sourceLineNo">221</span><a name="line.221"></a>
<span class="sourceLineNo">222</span> result = SegmentFactory.instance().createImmutableSegmentByCompaction(<a name="line.222"></a>
<span class="sourceLineNo">223</span> compactingMemStore.getConfiguration(), compactingMemStore.getComparator(), iterator,<a name="line.223"></a>
<span class="sourceLineNo">224</span> versionedList.getNumOfCells(), compactingMemStore.getIndexType(), action);<a name="line.224"></a>
<span class="sourceLineNo">225</span> iterator.close();<a name="line.225"></a>
<span class="sourceLineNo">226</span> break;<a name="line.226"></a>
<span class="sourceLineNo">227</span> case MERGE:<a name="line.227"></a>
<span class="sourceLineNo">228</span> case MERGE_COUNT_UNIQUE_KEYS:<a name="line.228"></a>
<span class="sourceLineNo">229</span> iterator =<a name="line.229"></a>
<span class="sourceLineNo">230</span> new MemStoreMergerSegmentsIterator(segments,<a name="line.230"></a>
<span class="sourceLineNo">231</span> compactingMemStore.getComparator(), compactionKVMax);<a name="line.231"></a>
<span class="sourceLineNo">232</span><a name="line.232"></a>
<span class="sourceLineNo">233</span> result = SegmentFactory.instance().createImmutableSegmentByMerge(<a name="line.233"></a>
<span class="sourceLineNo">234</span> compactingMemStore.getConfiguration(), compactingMemStore.getComparator(), iterator,<a name="line.234"></a>
<span class="sourceLineNo">235</span> versionedList.getNumOfCells(), segments, compactingMemStore.getIndexType(), action);<a name="line.235"></a>
<span class="sourceLineNo">236</span> iterator.close();<a name="line.236"></a>
<span class="sourceLineNo">237</span> break;<a name="line.237"></a>
<span class="sourceLineNo">238</span> default:<a name="line.238"></a>
<span class="sourceLineNo">239</span> throw new RuntimeException("Unknown action " + action); // sanity check<a name="line.239"></a>
<span class="sourceLineNo">240</span> }<a name="line.240"></a>
<span class="sourceLineNo">241</span><a name="line.241"></a>
<span class="sourceLineNo">242</span> return result;<a name="line.242"></a>
<span class="sourceLineNo">243</span> }<a name="line.243"></a>
<span class="sourceLineNo">244</span><a name="line.244"></a>
<span class="sourceLineNo">245</span> @VisibleForTesting<a name="line.245"></a>
<span class="sourceLineNo">246</span> void initiateCompactionStrategy(MemoryCompactionPolicy compType,<a name="line.246"></a>
<span class="sourceLineNo">247</span> Configuration configuration, String cfName) throws IllegalArgumentIOException {<a name="line.247"></a>
<span class="sourceLineNo">248</span><a name="line.248"></a>
<span class="sourceLineNo">249</span> assert (compType !=MemoryCompactionPolicy.NONE);<a name="line.249"></a>
<span class="sourceLineNo">250</span><a name="line.250"></a>
<span class="sourceLineNo">251</span> switch (compType){<a name="line.251"></a>
<span class="sourceLineNo">252</span> case BASIC: strategy = new BasicMemStoreCompactionStrategy(configuration, cfName);<a name="line.252"></a>
<span class="sourceLineNo">253</span> break;<a name="line.253"></a>
<span class="sourceLineNo">254</span> case EAGER: strategy = new EagerMemStoreCompactionStrategy(configuration, cfName);<a name="line.254"></a>
<span class="sourceLineNo">255</span> break;<a name="line.255"></a>
<span class="sourceLineNo">256</span> case ADAPTIVE: strategy = new AdaptiveMemStoreCompactionStrategy(configuration, cfName);<a name="line.256"></a>
<span class="sourceLineNo">257</span> break;<a name="line.257"></a>
<span class="sourceLineNo">258</span> default:<a name="line.258"></a>
<span class="sourceLineNo">259</span> // sanity check<a name="line.259"></a>
<span class="sourceLineNo">260</span> throw new IllegalArgumentIOException("Unknown memory compaction type " + compType);<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>}<a name="line.263"></a>
</pre>
</div>
</body>
</html>