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<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.mob;<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.ArrayList;<a name="line.22"></a>
<span class="sourceLineNo">023</span>import java.util.Collections;<a name="line.23"></a>
<span class="sourceLineNo">024</span>import java.util.List;<a name="line.24"></a>
<span class="sourceLineNo">025</span>import java.util.Map;<a name="line.25"></a>
<span class="sourceLineNo">026</span>import java.util.concurrent.ConcurrentHashMap;<a name="line.26"></a>
<span class="sourceLineNo">027</span>import java.util.concurrent.Executors;<a name="line.27"></a>
<span class="sourceLineNo">028</span>import java.util.concurrent.ScheduledExecutorService;<a name="line.28"></a>
<span class="sourceLineNo">029</span>import java.util.concurrent.TimeUnit;<a name="line.29"></a>
<span class="sourceLineNo">030</span>import java.util.concurrent.atomic.AtomicLong;<a name="line.30"></a>
<span class="sourceLineNo">031</span>import java.util.concurrent.atomic.LongAdder;<a name="line.31"></a>
<span class="sourceLineNo">032</span>import java.util.concurrent.locks.ReentrantLock;<a name="line.32"></a>
<span class="sourceLineNo">033</span><a name="line.33"></a>
<span class="sourceLineNo">034</span>import org.apache.hadoop.conf.Configuration;<a name="line.34"></a>
<span class="sourceLineNo">035</span>import org.apache.hadoop.fs.FileSystem;<a name="line.35"></a>
<span class="sourceLineNo">036</span>import org.apache.hadoop.fs.Path;<a name="line.36"></a>
<span class="sourceLineNo">037</span>import org.apache.hadoop.hbase.io.hfile.CacheConfig;<a name="line.37"></a>
<span class="sourceLineNo">038</span>import org.apache.hadoop.hbase.util.IdLock;<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.slf4j.Logger;<a name="line.40"></a>
<span class="sourceLineNo">041</span>import org.slf4j.LoggerFactory;<a name="line.41"></a>
<span class="sourceLineNo">042</span><a name="line.42"></a>
<span class="sourceLineNo">043</span>import org.apache.hbase.thirdparty.com.google.common.util.concurrent.ThreadFactoryBuilder;<a name="line.43"></a>
<span class="sourceLineNo">044</span><a name="line.44"></a>
<span class="sourceLineNo">045</span>/**<a name="line.45"></a>
<span class="sourceLineNo">046</span> * The cache for mob files.<a name="line.46"></a>
<span class="sourceLineNo">047</span> * This cache doesn't cache the mob file blocks. It only caches the references of mob files.<a name="line.47"></a>
<span class="sourceLineNo">048</span> * We are doing this to avoid opening and closing mob files all the time. We just keep<a name="line.48"></a>
<span class="sourceLineNo">049</span> * references open.<a name="line.49"></a>
<span class="sourceLineNo">050</span> */<a name="line.50"></a>
<span class="sourceLineNo">051</span>@InterfaceAudience.Private<a name="line.51"></a>
<span class="sourceLineNo">052</span>public class MobFileCache {<a name="line.52"></a>
<span class="sourceLineNo">053</span><a name="line.53"></a>
<span class="sourceLineNo">054</span> private static final Logger LOG = LoggerFactory.getLogger(MobFileCache.class);<a name="line.54"></a>
<span class="sourceLineNo">055</span><a name="line.55"></a>
<span class="sourceLineNo">056</span> /*<a name="line.56"></a>
<span class="sourceLineNo">057</span> * Eviction and statistics thread. Periodically run to print the statistics and<a name="line.57"></a>
<span class="sourceLineNo">058</span> * evict the lru cached mob files when the count of the cached files is larger<a name="line.58"></a>
<span class="sourceLineNo">059</span> * than the threshold.<a name="line.59"></a>
<span class="sourceLineNo">060</span> */<a name="line.60"></a>
<span class="sourceLineNo">061</span> static class EvictionThread extends Thread {<a name="line.61"></a>
<span class="sourceLineNo">062</span> MobFileCache lru;<a name="line.62"></a>
<span class="sourceLineNo">063</span><a name="line.63"></a>
<span class="sourceLineNo">064</span> public EvictionThread(MobFileCache lru) {<a name="line.64"></a>
<span class="sourceLineNo">065</span> super("MobFileCache.EvictionThread");<a name="line.65"></a>
<span class="sourceLineNo">066</span> setDaemon(true);<a name="line.66"></a>
<span class="sourceLineNo">067</span> this.lru = lru;<a name="line.67"></a>
<span class="sourceLineNo">068</span> }<a name="line.68"></a>
<span class="sourceLineNo">069</span><a name="line.69"></a>
<span class="sourceLineNo">070</span> @Override<a name="line.70"></a>
<span class="sourceLineNo">071</span> public void run() {<a name="line.71"></a>
<span class="sourceLineNo">072</span> lru.evict();<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><a name="line.75"></a>
<span class="sourceLineNo">076</span> // a ConcurrentHashMap, accesses to this map are synchronized.<a name="line.76"></a>
<span class="sourceLineNo">077</span> private Map&lt;String, CachedMobFile&gt; map = null;<a name="line.77"></a>
<span class="sourceLineNo">078</span> // caches access count<a name="line.78"></a>
<span class="sourceLineNo">079</span> private final AtomicLong count = new AtomicLong(0);<a name="line.79"></a>
<span class="sourceLineNo">080</span> private long lastAccess = 0;<a name="line.80"></a>
<span class="sourceLineNo">081</span> private final LongAdder miss = new LongAdder();<a name="line.81"></a>
<span class="sourceLineNo">082</span> private long lastMiss = 0;<a name="line.82"></a>
<span class="sourceLineNo">083</span> private final LongAdder evictedFileCount = new LongAdder();<a name="line.83"></a>
<span class="sourceLineNo">084</span> private long lastEvictedFileCount = 0;<a name="line.84"></a>
<span class="sourceLineNo">085</span><a name="line.85"></a>
<span class="sourceLineNo">086</span> // a lock to sync the evict to guarantee the eviction occurs in sequence.<a name="line.86"></a>
<span class="sourceLineNo">087</span> // the method evictFile is not sync by this lock, the ConcurrentHashMap does the sync there.<a name="line.87"></a>
<span class="sourceLineNo">088</span> private final ReentrantLock evictionLock = new ReentrantLock(true);<a name="line.88"></a>
<span class="sourceLineNo">089</span><a name="line.89"></a>
<span class="sourceLineNo">090</span> //stripes lock on each mob file based on its hash. Sync the openFile/closeFile operations.<a name="line.90"></a>
<span class="sourceLineNo">091</span> private final IdLock keyLock = new IdLock();<a name="line.91"></a>
<span class="sourceLineNo">092</span><a name="line.92"></a>
<span class="sourceLineNo">093</span> private final ScheduledExecutorService scheduleThreadPool = Executors.newScheduledThreadPool(1,<a name="line.93"></a>
<span class="sourceLineNo">094</span> new ThreadFactoryBuilder().setNameFormat("MobFileCache #%d").setDaemon(true).build());<a name="line.94"></a>
<span class="sourceLineNo">095</span> private final Configuration conf;<a name="line.95"></a>
<span class="sourceLineNo">096</span><a name="line.96"></a>
<span class="sourceLineNo">097</span> // the count of the cached references to mob files<a name="line.97"></a>
<span class="sourceLineNo">098</span> private final int mobFileMaxCacheSize;<a name="line.98"></a>
<span class="sourceLineNo">099</span> private final boolean isCacheEnabled;<a name="line.99"></a>
<span class="sourceLineNo">100</span> private float evictRemainRatio;<a name="line.100"></a>
<span class="sourceLineNo">101</span><a name="line.101"></a>
<span class="sourceLineNo">102</span> public MobFileCache(Configuration conf) {<a name="line.102"></a>
<span class="sourceLineNo">103</span> this.conf = conf;<a name="line.103"></a>
<span class="sourceLineNo">104</span> this.mobFileMaxCacheSize = conf.getInt(MobConstants.MOB_FILE_CACHE_SIZE_KEY,<a name="line.104"></a>
<span class="sourceLineNo">105</span> MobConstants.DEFAULT_MOB_FILE_CACHE_SIZE);<a name="line.105"></a>
<span class="sourceLineNo">106</span> isCacheEnabled = (mobFileMaxCacheSize &gt; 0);<a name="line.106"></a>
<span class="sourceLineNo">107</span> map = new ConcurrentHashMap&lt;&gt;(mobFileMaxCacheSize);<a name="line.107"></a>
<span class="sourceLineNo">108</span> if (isCacheEnabled) {<a name="line.108"></a>
<span class="sourceLineNo">109</span> long period = conf.getLong(MobConstants.MOB_CACHE_EVICT_PERIOD,<a name="line.109"></a>
<span class="sourceLineNo">110</span> MobConstants.DEFAULT_MOB_CACHE_EVICT_PERIOD); // in seconds<a name="line.110"></a>
<span class="sourceLineNo">111</span> evictRemainRatio = conf.getFloat(MobConstants.MOB_CACHE_EVICT_REMAIN_RATIO,<a name="line.111"></a>
<span class="sourceLineNo">112</span> MobConstants.DEFAULT_EVICT_REMAIN_RATIO);<a name="line.112"></a>
<span class="sourceLineNo">113</span> if (evictRemainRatio &lt; 0.0) {<a name="line.113"></a>
<span class="sourceLineNo">114</span> evictRemainRatio = 0.0f;<a name="line.114"></a>
<span class="sourceLineNo">115</span> LOG.warn(MobConstants.MOB_CACHE_EVICT_REMAIN_RATIO + " is less than 0.0, 0.0 is used.");<a name="line.115"></a>
<span class="sourceLineNo">116</span> } else if (evictRemainRatio &gt; 1.0) {<a name="line.116"></a>
<span class="sourceLineNo">117</span> evictRemainRatio = 1.0f;<a name="line.117"></a>
<span class="sourceLineNo">118</span> LOG.warn(MobConstants.MOB_CACHE_EVICT_REMAIN_RATIO + " is larger than 1.0, 1.0 is used.");<a name="line.118"></a>
<span class="sourceLineNo">119</span> }<a name="line.119"></a>
<span class="sourceLineNo">120</span> this.scheduleThreadPool.scheduleAtFixedRate(new EvictionThread(this), period, period,<a name="line.120"></a>
<span class="sourceLineNo">121</span> TimeUnit.SECONDS);<a name="line.121"></a>
<span class="sourceLineNo">122</span><a name="line.122"></a>
<span class="sourceLineNo">123</span> if (LOG.isDebugEnabled()) {<a name="line.123"></a>
<span class="sourceLineNo">124</span> LOG.debug("MobFileCache enabled with cacheSize=" + mobFileMaxCacheSize +<a name="line.124"></a>
<span class="sourceLineNo">125</span> ", evictPeriods=" + period + "sec, evictRemainRatio=" + evictRemainRatio);<a name="line.125"></a>
<span class="sourceLineNo">126</span> }<a name="line.126"></a>
<span class="sourceLineNo">127</span> } else {<a name="line.127"></a>
<span class="sourceLineNo">128</span> LOG.info("MobFileCache disabled");<a name="line.128"></a>
<span class="sourceLineNo">129</span> }<a name="line.129"></a>
<span class="sourceLineNo">130</span> }<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> * Evicts the lru cached mob files when the count of the cached files is larger<a name="line.133"></a>
<span class="sourceLineNo">134</span> * than the threshold.<a name="line.134"></a>
<span class="sourceLineNo">135</span> */<a name="line.135"></a>
<span class="sourceLineNo">136</span> public void evict() {<a name="line.136"></a>
<span class="sourceLineNo">137</span> if (isCacheEnabled) {<a name="line.137"></a>
<span class="sourceLineNo">138</span> // Ensure only one eviction at a time<a name="line.138"></a>
<span class="sourceLineNo">139</span> if (!evictionLock.tryLock()) {<a name="line.139"></a>
<span class="sourceLineNo">140</span> return;<a name="line.140"></a>
<span class="sourceLineNo">141</span> }<a name="line.141"></a>
<span class="sourceLineNo">142</span> printStatistics();<a name="line.142"></a>
<span class="sourceLineNo">143</span> List&lt;CachedMobFile&gt; evictedFiles = new ArrayList&lt;&gt;();<a name="line.143"></a>
<span class="sourceLineNo">144</span> try {<a name="line.144"></a>
<span class="sourceLineNo">145</span> if (map.size() &lt;= mobFileMaxCacheSize) {<a name="line.145"></a>
<span class="sourceLineNo">146</span> return;<a name="line.146"></a>
<span class="sourceLineNo">147</span> }<a name="line.147"></a>
<span class="sourceLineNo">148</span> List&lt;CachedMobFile&gt; files = new ArrayList&lt;&gt;(map.values());<a name="line.148"></a>
<span class="sourceLineNo">149</span> Collections.sort(files);<a name="line.149"></a>
<span class="sourceLineNo">150</span> int start = (int) (mobFileMaxCacheSize * evictRemainRatio);<a name="line.150"></a>
<span class="sourceLineNo">151</span> if (start &gt;= 0) {<a name="line.151"></a>
<span class="sourceLineNo">152</span> for (int i = start; i &lt; files.size(); i++) {<a name="line.152"></a>
<span class="sourceLineNo">153</span> String name = files.get(i).getFileName();<a name="line.153"></a>
<span class="sourceLineNo">154</span> CachedMobFile evictedFile = map.remove(name);<a name="line.154"></a>
<span class="sourceLineNo">155</span> if (evictedFile != null) {<a name="line.155"></a>
<span class="sourceLineNo">156</span> evictedFiles.add(evictedFile);<a name="line.156"></a>
<span class="sourceLineNo">157</span> }<a name="line.157"></a>
<span class="sourceLineNo">158</span> }<a name="line.158"></a>
<span class="sourceLineNo">159</span> }<a name="line.159"></a>
<span class="sourceLineNo">160</span> } finally {<a name="line.160"></a>
<span class="sourceLineNo">161</span> evictionLock.unlock();<a name="line.161"></a>
<span class="sourceLineNo">162</span> }<a name="line.162"></a>
<span class="sourceLineNo">163</span> // EvictionLock is released. Close the evicted files one by one.<a name="line.163"></a>
<span class="sourceLineNo">164</span> // The closes are sync in the closeFile method.<a name="line.164"></a>
<span class="sourceLineNo">165</span> for (CachedMobFile evictedFile : evictedFiles) {<a name="line.165"></a>
<span class="sourceLineNo">166</span> closeFile(evictedFile);<a name="line.166"></a>
<span class="sourceLineNo">167</span> }<a name="line.167"></a>
<span class="sourceLineNo">168</span> evictedFileCount.add(evictedFiles.size());<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><a name="line.171"></a>
<span class="sourceLineNo">172</span> /**<a name="line.172"></a>
<span class="sourceLineNo">173</span> * Evicts the cached file by the name.<a name="line.173"></a>
<span class="sourceLineNo">174</span> * @param fileName The name of a cached file.<a name="line.174"></a>
<span class="sourceLineNo">175</span> */<a name="line.175"></a>
<span class="sourceLineNo">176</span> public void evictFile(String fileName) {<a name="line.176"></a>
<span class="sourceLineNo">177</span> if (isCacheEnabled) {<a name="line.177"></a>
<span class="sourceLineNo">178</span> IdLock.Entry lockEntry = null;<a name="line.178"></a>
<span class="sourceLineNo">179</span> try {<a name="line.179"></a>
<span class="sourceLineNo">180</span> // obtains the lock to close the cached file.<a name="line.180"></a>
<span class="sourceLineNo">181</span> lockEntry = keyLock.getLockEntry(fileName.hashCode());<a name="line.181"></a>
<span class="sourceLineNo">182</span> CachedMobFile evictedFile = map.remove(fileName);<a name="line.182"></a>
<span class="sourceLineNo">183</span> if (evictedFile != null) {<a name="line.183"></a>
<span class="sourceLineNo">184</span> evictedFile.close();<a name="line.184"></a>
<span class="sourceLineNo">185</span> evictedFileCount.increment();<a name="line.185"></a>
<span class="sourceLineNo">186</span> }<a name="line.186"></a>
<span class="sourceLineNo">187</span> } catch (IOException e) {<a name="line.187"></a>
<span class="sourceLineNo">188</span> LOG.error("Failed to evict the file " + fileName, e);<a name="line.188"></a>
<span class="sourceLineNo">189</span> } finally {<a name="line.189"></a>
<span class="sourceLineNo">190</span> if (lockEntry != null) {<a name="line.190"></a>
<span class="sourceLineNo">191</span> keyLock.releaseLockEntry(lockEntry);<a name="line.191"></a>
<span class="sourceLineNo">192</span> }<a name="line.192"></a>
<span class="sourceLineNo">193</span> }<a name="line.193"></a>
<span class="sourceLineNo">194</span> }<a name="line.194"></a>
<span class="sourceLineNo">195</span> }<a name="line.195"></a>
<span class="sourceLineNo">196</span><a name="line.196"></a>
<span class="sourceLineNo">197</span> /**<a name="line.197"></a>
<span class="sourceLineNo">198</span> * Opens a mob file.<a name="line.198"></a>
<span class="sourceLineNo">199</span> * @param fs The current file system.<a name="line.199"></a>
<span class="sourceLineNo">200</span> * @param path The file path.<a name="line.200"></a>
<span class="sourceLineNo">201</span> * @param cacheConf The current MobCacheConfig<a name="line.201"></a>
<span class="sourceLineNo">202</span> * @return A opened mob file.<a name="line.202"></a>
<span class="sourceLineNo">203</span> * @throws IOException<a name="line.203"></a>
<span class="sourceLineNo">204</span> */<a name="line.204"></a>
<span class="sourceLineNo">205</span> public MobFile openFile(FileSystem fs, Path path, CacheConfig cacheConf) throws IOException {<a name="line.205"></a>
<span class="sourceLineNo">206</span> if (!isCacheEnabled) {<a name="line.206"></a>
<span class="sourceLineNo">207</span> MobFile mobFile = MobFile.create(fs, path, conf, cacheConf);<a name="line.207"></a>
<span class="sourceLineNo">208</span> mobFile.open();<a name="line.208"></a>
<span class="sourceLineNo">209</span> return mobFile;<a name="line.209"></a>
<span class="sourceLineNo">210</span> } else {<a name="line.210"></a>
<span class="sourceLineNo">211</span> String fileName = path.getName();<a name="line.211"></a>
<span class="sourceLineNo">212</span> CachedMobFile cached = map.get(fileName);<a name="line.212"></a>
<span class="sourceLineNo">213</span> IdLock.Entry lockEntry = keyLock.getLockEntry(fileName.hashCode());<a name="line.213"></a>
<span class="sourceLineNo">214</span> try {<a name="line.214"></a>
<span class="sourceLineNo">215</span> if (cached == null) {<a name="line.215"></a>
<span class="sourceLineNo">216</span> cached = map.get(fileName);<a name="line.216"></a>
<span class="sourceLineNo">217</span> if (cached == null) {<a name="line.217"></a>
<span class="sourceLineNo">218</span> if (map.size() &gt; mobFileMaxCacheSize) {<a name="line.218"></a>
<span class="sourceLineNo">219</span> evict();<a name="line.219"></a>
<span class="sourceLineNo">220</span> }<a name="line.220"></a>
<span class="sourceLineNo">221</span> cached = CachedMobFile.create(fs, path, conf, cacheConf);<a name="line.221"></a>
<span class="sourceLineNo">222</span> cached.open();<a name="line.222"></a>
<span class="sourceLineNo">223</span> map.put(fileName, cached);<a name="line.223"></a>
<span class="sourceLineNo">224</span> miss.increment();<a name="line.224"></a>
<span class="sourceLineNo">225</span> }<a name="line.225"></a>
<span class="sourceLineNo">226</span> }<a name="line.226"></a>
<span class="sourceLineNo">227</span> cached.open();<a name="line.227"></a>
<span class="sourceLineNo">228</span> cached.access(count.incrementAndGet());<a name="line.228"></a>
<span class="sourceLineNo">229</span> } finally {<a name="line.229"></a>
<span class="sourceLineNo">230</span> keyLock.releaseLockEntry(lockEntry);<a name="line.230"></a>
<span class="sourceLineNo">231</span> }<a name="line.231"></a>
<span class="sourceLineNo">232</span> return cached;<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> /**<a name="line.236"></a>
<span class="sourceLineNo">237</span> * Closes a mob file.<a name="line.237"></a>
<span class="sourceLineNo">238</span> * @param file The mob file that needs to be closed.<a name="line.238"></a>
<span class="sourceLineNo">239</span> */<a name="line.239"></a>
<span class="sourceLineNo">240</span> public void closeFile(MobFile file) {<a name="line.240"></a>
<span class="sourceLineNo">241</span> IdLock.Entry lockEntry = null;<a name="line.241"></a>
<span class="sourceLineNo">242</span> try {<a name="line.242"></a>
<span class="sourceLineNo">243</span> if (!isCacheEnabled) {<a name="line.243"></a>
<span class="sourceLineNo">244</span> file.close();<a name="line.244"></a>
<span class="sourceLineNo">245</span> } else {<a name="line.245"></a>
<span class="sourceLineNo">246</span> lockEntry = keyLock.getLockEntry(file.getFileName().hashCode());<a name="line.246"></a>
<span class="sourceLineNo">247</span> file.close();<a name="line.247"></a>
<span class="sourceLineNo">248</span> }<a name="line.248"></a>
<span class="sourceLineNo">249</span> } catch (IOException e) {<a name="line.249"></a>
<span class="sourceLineNo">250</span> LOG.error("MobFileCache, Exception happen during close " + file.getFileName(), e);<a name="line.250"></a>
<span class="sourceLineNo">251</span> } finally {<a name="line.251"></a>
<span class="sourceLineNo">252</span> if (lockEntry != null) {<a name="line.252"></a>
<span class="sourceLineNo">253</span> keyLock.releaseLockEntry(lockEntry);<a name="line.253"></a>
<span class="sourceLineNo">254</span> }<a name="line.254"></a>
<span class="sourceLineNo">255</span> }<a name="line.255"></a>
<span class="sourceLineNo">256</span> }<a name="line.256"></a>
<span class="sourceLineNo">257</span><a name="line.257"></a>
<span class="sourceLineNo">258</span> public void shutdown() {<a name="line.258"></a>
<span class="sourceLineNo">259</span> this.scheduleThreadPool.shutdown();<a name="line.259"></a>
<span class="sourceLineNo">260</span> for (int i = 0; i &lt; 100; i++) {<a name="line.260"></a>
<span class="sourceLineNo">261</span> if (!this.scheduleThreadPool.isShutdown()) {<a name="line.261"></a>
<span class="sourceLineNo">262</span> try {<a name="line.262"></a>
<span class="sourceLineNo">263</span> Thread.sleep(10);<a name="line.263"></a>
<span class="sourceLineNo">264</span> } catch (InterruptedException e) {<a name="line.264"></a>
<span class="sourceLineNo">265</span> LOG.warn("Interrupted while sleeping");<a name="line.265"></a>
<span class="sourceLineNo">266</span> Thread.currentThread().interrupt();<a name="line.266"></a>
<span class="sourceLineNo">267</span> break;<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> }<a name="line.270"></a>
<span class="sourceLineNo">271</span><a name="line.271"></a>
<span class="sourceLineNo">272</span> if (!this.scheduleThreadPool.isShutdown()) {<a name="line.272"></a>
<span class="sourceLineNo">273</span> List&lt;Runnable&gt; runnables = this.scheduleThreadPool.shutdownNow();<a name="line.273"></a>
<span class="sourceLineNo">274</span> LOG.debug("Still running " + runnables);<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><a name="line.277"></a>
<span class="sourceLineNo">278</span> /**<a name="line.278"></a>
<span class="sourceLineNo">279</span> * Gets the count of cached mob files.<a name="line.279"></a>
<span class="sourceLineNo">280</span> * @return The count of the cached mob files.<a name="line.280"></a>
<span class="sourceLineNo">281</span> */<a name="line.281"></a>
<span class="sourceLineNo">282</span> public int getCacheSize() {<a name="line.282"></a>
<span class="sourceLineNo">283</span> return map == null ? 0 : map.size();<a name="line.283"></a>
<span class="sourceLineNo">284</span> }<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> * Gets the count of accesses to the mob file cache.<a name="line.287"></a>
<span class="sourceLineNo">288</span> * @return The count of accesses to the mob file cache.<a name="line.288"></a>
<span class="sourceLineNo">289</span> */<a name="line.289"></a>
<span class="sourceLineNo">290</span> public long getAccessCount() {<a name="line.290"></a>
<span class="sourceLineNo">291</span> return count.get();<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> /**<a name="line.294"></a>
<span class="sourceLineNo">295</span> * Gets the count of misses to the mob file cache.<a name="line.295"></a>
<span class="sourceLineNo">296</span> * @return The count of misses to the mob file cache.<a name="line.296"></a>
<span class="sourceLineNo">297</span> */<a name="line.297"></a>
<span class="sourceLineNo">298</span> public long getMissCount() {<a name="line.298"></a>
<span class="sourceLineNo">299</span> return miss.sum();<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> * Gets the number of items evicted from the mob file cache.<a name="line.303"></a>
<span class="sourceLineNo">304</span> * @return The number of items evicted from the mob file cache.<a name="line.304"></a>
<span class="sourceLineNo">305</span> */<a name="line.305"></a>
<span class="sourceLineNo">306</span> public long getEvictedFileCount() {<a name="line.306"></a>
<span class="sourceLineNo">307</span> return evictedFileCount.sum();<a name="line.307"></a>
<span class="sourceLineNo">308</span> }<a name="line.308"></a>
<span class="sourceLineNo">309</span><a name="line.309"></a>
<span class="sourceLineNo">310</span> /**<a name="line.310"></a>
<span class="sourceLineNo">311</span> * Gets the hit ratio to the mob file cache.<a name="line.311"></a>
<span class="sourceLineNo">312</span> * @return The hit ratio to the mob file cache.<a name="line.312"></a>
<span class="sourceLineNo">313</span> */<a name="line.313"></a>
<span class="sourceLineNo">314</span> public double getHitRatio() {<a name="line.314"></a>
<span class="sourceLineNo">315</span> return count.get() == 0 ? 0 : ((float) (count.get() - miss.sum())) / (float) count.get();<a name="line.315"></a>
<span class="sourceLineNo">316</span> }<a name="line.316"></a>
<span class="sourceLineNo">317</span><a name="line.317"></a>
<span class="sourceLineNo">318</span> /**<a name="line.318"></a>
<span class="sourceLineNo">319</span> * Prints the statistics.<a name="line.319"></a>
<span class="sourceLineNo">320</span> */<a name="line.320"></a>
<span class="sourceLineNo">321</span> public void printStatistics() {<a name="line.321"></a>
<span class="sourceLineNo">322</span> long access = count.get() - lastAccess;<a name="line.322"></a>
<span class="sourceLineNo">323</span> long missed = miss.sum() - lastMiss;<a name="line.323"></a>
<span class="sourceLineNo">324</span> long evicted = evictedFileCount.sum() - lastEvictedFileCount;<a name="line.324"></a>
<span class="sourceLineNo">325</span> int hitRatio = access == 0 ? 0 : (int) (((float) (access - missed)) / (float) access * 100);<a name="line.325"></a>
<span class="sourceLineNo">326</span> LOG.info("MobFileCache Statistics, access: " + access + ", miss: " + missed + ", hit: "<a name="line.326"></a>
<span class="sourceLineNo">327</span> + (access - missed) + ", hit ratio: " + hitRatio + "%, evicted files: " + evicted);<a name="line.327"></a>
<span class="sourceLineNo">328</span> lastAccess += access;<a name="line.328"></a>
<span class="sourceLineNo">329</span> lastMiss += missed;<a name="line.329"></a>
<span class="sourceLineNo">330</span> lastEvictedFileCount += evicted;<a name="line.330"></a>
<span class="sourceLineNo">331</span> }<a name="line.331"></a>
<span class="sourceLineNo">332</span><a name="line.332"></a>
<span class="sourceLineNo">333</span>}<a name="line.333"></a>
</pre>
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