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From git-site-r...@apache.org
Subject [32/51] [partial] hbase-site git commit: Published site at .
Date Thu, 23 Nov 2017 15:24:57 GMT
http://git-wip-us.apache.org/repos/asf/hbase-site/blob/9118853f/devapidocs/src-html/org/apache/hadoop/hbase/master/cleaner/CleanerChore.CleanerTask.html
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+<!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> * 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.master.cleaner;<a name="line.18"></a>
+<span class="sourceLineNo">019</span><a name="line.19"></a>
+<span class="sourceLineNo">020</span>import org.apache.hadoop.hbase.conf.ConfigurationObserver;<a name="line.20"></a>
+<span class="sourceLineNo">021</span>import org.apache.hadoop.hbase.shaded.com.google.common.annotations.VisibleForTesting;<a name="line.21"></a>
+<span class="sourceLineNo">022</span>import org.apache.hadoop.hbase.shaded.com.google.common.base.Predicate;<a name="line.22"></a>
+<span class="sourceLineNo">023</span>import org.apache.hadoop.hbase.shaded.com.google.common.collect.ImmutableSet;<a name="line.23"></a>
+<span class="sourceLineNo">024</span>import org.apache.hadoop.hbase.shaded.com.google.common.collect.Iterables;<a name="line.24"></a>
+<span class="sourceLineNo">025</span>import org.apache.hadoop.hbase.shaded.com.google.common.collect.Lists;<a name="line.25"></a>
+<span class="sourceLineNo">026</span><a name="line.26"></a>
+<span class="sourceLineNo">027</span>import java.io.IOException;<a name="line.27"></a>
+<span class="sourceLineNo">028</span>import java.util.Comparator;<a name="line.28"></a>
+<span class="sourceLineNo">029</span>import java.util.HashMap;<a name="line.29"></a>
+<span class="sourceLineNo">030</span>import java.util.LinkedList;<a name="line.30"></a>
+<span class="sourceLineNo">031</span>import java.util.List;<a name="line.31"></a>
+<span class="sourceLineNo">032</span>import java.util.Map;<a name="line.32"></a>
+<span class="sourceLineNo">033</span>import java.util.concurrent.ExecutionException;<a name="line.33"></a>
+<span class="sourceLineNo">034</span>import java.util.concurrent.ForkJoinPool;<a name="line.34"></a>
+<span class="sourceLineNo">035</span>import java.util.concurrent.RecursiveTask;<a name="line.35"></a>
+<span class="sourceLineNo">036</span>import java.util.concurrent.atomic.AtomicBoolean;<a name="line.36"></a>
+<span class="sourceLineNo">037</span><a name="line.37"></a>
+<span class="sourceLineNo">038</span>import org.apache.commons.logging.Log;<a name="line.38"></a>
+<span class="sourceLineNo">039</span>import org.apache.commons.logging.LogFactory;<a name="line.39"></a>
+<span class="sourceLineNo">040</span>import org.apache.hadoop.conf.Configuration;<a name="line.40"></a>
+<span class="sourceLineNo">041</span>import org.apache.hadoop.fs.FileStatus;<a name="line.41"></a>
+<span class="sourceLineNo">042</span>import org.apache.hadoop.fs.FileSystem;<a name="line.42"></a>
+<span class="sourceLineNo">043</span>import org.apache.hadoop.fs.Path;<a name="line.43"></a>
+<span class="sourceLineNo">044</span>import org.apache.hadoop.hbase.ScheduledChore;<a name="line.44"></a>
+<span class="sourceLineNo">045</span>import org.apache.hadoop.hbase.Stoppable;<a name="line.45"></a>
+<span class="sourceLineNo">046</span>import org.apache.hadoop.hbase.util.FSUtils;<a name="line.46"></a>
+<span class="sourceLineNo">047</span>import org.apache.hadoop.ipc.RemoteException;<a name="line.47"></a>
+<span class="sourceLineNo">048</span><a name="line.48"></a>
+<span class="sourceLineNo">049</span>/**<a name="line.49"></a>
+<span class="sourceLineNo">050</span> * Abstract Cleaner that uses a chain of delegates to clean a directory of files<a name="line.50"></a>
+<span class="sourceLineNo">051</span> * @param &lt;T&gt; Cleaner delegate class that is dynamically loaded from configuration<a name="line.51"></a>
+<span class="sourceLineNo">052</span> */<a name="line.52"></a>
+<span class="sourceLineNo">053</span>public abstract class CleanerChore&lt;T extends FileCleanerDelegate&gt; extends ScheduledChore<a name="line.53"></a>
+<span class="sourceLineNo">054</span>    implements ConfigurationObserver {<a name="line.54"></a>
+<span class="sourceLineNo">055</span><a name="line.55"></a>
+<span class="sourceLineNo">056</span>  private static final Log LOG = LogFactory.getLog(CleanerChore.class.getName());<a name="line.56"></a>
+<span class="sourceLineNo">057</span>  private static final int AVAIL_PROCESSORS = Runtime.getRuntime().availableProcessors();<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>   * If it is an integer and &gt;= 1, it would be the size;<a name="line.60"></a>
+<span class="sourceLineNo">061</span>   * if 0.0 &lt; size &lt;= 1.0, size would be available processors * size.<a name="line.61"></a>
+<span class="sourceLineNo">062</span>   * Pay attention that 1.0 is different from 1, former indicates it will use 100% of cores,<a name="line.62"></a>
+<span class="sourceLineNo">063</span>   * while latter will use only 1 thread for chore to scan dir.<a name="line.63"></a>
+<span class="sourceLineNo">064</span>   */<a name="line.64"></a>
+<span class="sourceLineNo">065</span>  public static final String CHORE_POOL_SIZE = "hbase.cleaner.scan.dir.concurrent.size";<a name="line.65"></a>
+<span class="sourceLineNo">066</span>  private static final String DEFAULT_CHORE_POOL_SIZE = "0.5";<a name="line.66"></a>
+<span class="sourceLineNo">067</span><a name="line.67"></a>
+<span class="sourceLineNo">068</span>  // It may be waste resources for each cleaner chore own its pool,<a name="line.68"></a>
+<span class="sourceLineNo">069</span>  // so let's make pool for all cleaner chores.<a name="line.69"></a>
+<span class="sourceLineNo">070</span>  private static volatile ForkJoinPool chorePool;<a name="line.70"></a>
+<span class="sourceLineNo">071</span>  private static volatile int chorePoolSize;<a name="line.71"></a>
+<span class="sourceLineNo">072</span><a name="line.72"></a>
+<span class="sourceLineNo">073</span>  protected final FileSystem fs;<a name="line.73"></a>
+<span class="sourceLineNo">074</span>  private final Path oldFileDir;<a name="line.74"></a>
+<span class="sourceLineNo">075</span>  private final Configuration conf;<a name="line.75"></a>
+<span class="sourceLineNo">076</span>  protected final Map&lt;String, Object&gt; params;<a name="line.76"></a>
+<span class="sourceLineNo">077</span>  private final AtomicBoolean enabled = new AtomicBoolean(true);<a name="line.77"></a>
+<span class="sourceLineNo">078</span>  private final AtomicBoolean reconfig = new AtomicBoolean(false);<a name="line.78"></a>
+<span class="sourceLineNo">079</span>  protected List&lt;T&gt; cleanersChain;<a name="line.79"></a>
+<span class="sourceLineNo">080</span><a name="line.80"></a>
+<span class="sourceLineNo">081</span>  public CleanerChore(String name, final int sleepPeriod, final Stoppable s, Configuration conf,<a name="line.81"></a>
+<span class="sourceLineNo">082</span>                      FileSystem fs, Path oldFileDir, String confKey) {<a name="line.82"></a>
+<span class="sourceLineNo">083</span>    this(name, sleepPeriod, s, conf, fs, oldFileDir, confKey, null);<a name="line.83"></a>
+<span class="sourceLineNo">084</span>  }<a name="line.84"></a>
+<span class="sourceLineNo">085</span><a name="line.85"></a>
+<span class="sourceLineNo">086</span>  /**<a name="line.86"></a>
+<span class="sourceLineNo">087</span>   * @param name name of the chore being run<a name="line.87"></a>
+<span class="sourceLineNo">088</span>   * @param sleepPeriod the period of time to sleep between each run<a name="line.88"></a>
+<span class="sourceLineNo">089</span>   * @param s the stopper<a name="line.89"></a>
+<span class="sourceLineNo">090</span>   * @param conf configuration to use<a name="line.90"></a>
+<span class="sourceLineNo">091</span>   * @param fs handle to the FS<a name="line.91"></a>
+<span class="sourceLineNo">092</span>   * @param oldFileDir the path to the archived files<a name="line.92"></a>
+<span class="sourceLineNo">093</span>   * @param confKey configuration key for the classes to instantiate<a name="line.93"></a>
+<span class="sourceLineNo">094</span>   * @param params members could be used in cleaner<a name="line.94"></a>
+<span class="sourceLineNo">095</span>   */<a name="line.95"></a>
+<span class="sourceLineNo">096</span>  public CleanerChore(String name, final int sleepPeriod, final Stoppable s, Configuration conf,<a name="line.96"></a>
+<span class="sourceLineNo">097</span>      FileSystem fs, Path oldFileDir, String confKey, Map&lt;String, Object&gt; params) {<a name="line.97"></a>
+<span class="sourceLineNo">098</span>    super(name, s, sleepPeriod);<a name="line.98"></a>
+<span class="sourceLineNo">099</span>    this.fs = fs;<a name="line.99"></a>
+<span class="sourceLineNo">100</span>    this.oldFileDir = oldFileDir;<a name="line.100"></a>
+<span class="sourceLineNo">101</span>    this.conf = conf;<a name="line.101"></a>
+<span class="sourceLineNo">102</span>    this.params = params;<a name="line.102"></a>
+<span class="sourceLineNo">103</span>    initCleanerChain(confKey);<a name="line.103"></a>
+<span class="sourceLineNo">104</span><a name="line.104"></a>
+<span class="sourceLineNo">105</span>    if (chorePool == null) {<a name="line.105"></a>
+<span class="sourceLineNo">106</span>      String poolSize = conf.get(CHORE_POOL_SIZE, DEFAULT_CHORE_POOL_SIZE);<a name="line.106"></a>
+<span class="sourceLineNo">107</span>      chorePoolSize = calculatePoolSize(poolSize);<a name="line.107"></a>
+<span class="sourceLineNo">108</span>      // poolSize may be 0 or 0.0 from a careless configuration,<a name="line.108"></a>
+<span class="sourceLineNo">109</span>      // double check to make sure.<a name="line.109"></a>
+<span class="sourceLineNo">110</span>      chorePoolSize = chorePoolSize == 0 ?<a name="line.110"></a>
+<span class="sourceLineNo">111</span>          calculatePoolSize(DEFAULT_CHORE_POOL_SIZE) : chorePoolSize;<a name="line.111"></a>
+<span class="sourceLineNo">112</span>      this.chorePool = new ForkJoinPool(chorePoolSize);<a name="line.112"></a>
+<span class="sourceLineNo">113</span>      LOG.info("Cleaner pool size is " + chorePoolSize);<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><a name="line.116"></a>
+<span class="sourceLineNo">117</span>  /**<a name="line.117"></a>
+<span class="sourceLineNo">118</span>   * Calculate size for cleaner pool.<a name="line.118"></a>
+<span class="sourceLineNo">119</span>   * @param poolSize size from configuration<a name="line.119"></a>
+<span class="sourceLineNo">120</span>   * @return size of pool after calculation<a name="line.120"></a>
+<span class="sourceLineNo">121</span>   */<a name="line.121"></a>
+<span class="sourceLineNo">122</span>  private int calculatePoolSize(String poolSize) {<a name="line.122"></a>
+<span class="sourceLineNo">123</span>    if (poolSize.matches("[1-9][0-9]*")) {<a name="line.123"></a>
+<span class="sourceLineNo">124</span>      // If poolSize is an integer, return it directly,<a name="line.124"></a>
+<span class="sourceLineNo">125</span>      // but upmost to the number of available processors.<a name="line.125"></a>
+<span class="sourceLineNo">126</span>      int size = Math.min(Integer.valueOf(poolSize), AVAIL_PROCESSORS);<a name="line.126"></a>
+<span class="sourceLineNo">127</span>      if (size == AVAIL_PROCESSORS) {<a name="line.127"></a>
+<span class="sourceLineNo">128</span>        LOG.warn("Use full core processors to scan dir");<a name="line.128"></a>
+<span class="sourceLineNo">129</span>      }<a name="line.129"></a>
+<span class="sourceLineNo">130</span>      return size;<a name="line.130"></a>
+<span class="sourceLineNo">131</span>    } else if (poolSize.matches("0.[0-9]+|1.0")) {<a name="line.131"></a>
+<span class="sourceLineNo">132</span>      // if poolSize is a double, return poolSize * availableProcessors;<a name="line.132"></a>
+<span class="sourceLineNo">133</span>      return (int) (AVAIL_PROCESSORS * Double.valueOf(poolSize));<a name="line.133"></a>
+<span class="sourceLineNo">134</span>    } else {<a name="line.134"></a>
+<span class="sourceLineNo">135</span>      LOG.error("Unrecognized value: " + poolSize + " for " + CHORE_POOL_SIZE +<a name="line.135"></a>
+<span class="sourceLineNo">136</span>          ", use default config: " + DEFAULT_CHORE_POOL_SIZE + " instead.");<a name="line.136"></a>
+<span class="sourceLineNo">137</span>      return calculatePoolSize(DEFAULT_CHORE_POOL_SIZE);<a name="line.137"></a>
+<span class="sourceLineNo">138</span>    }<a name="line.138"></a>
+<span class="sourceLineNo">139</span>  }<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>   * Validate the file to see if it even belongs in the directory. If it is valid, then the file<a name="line.142"></a>
+<span class="sourceLineNo">143</span>   * will go through the cleaner delegates, but otherwise the file is just deleted.<a name="line.143"></a>
+<span class="sourceLineNo">144</span>   * @param file full {@link Path} of the file to be checked<a name="line.144"></a>
+<span class="sourceLineNo">145</span>   * @return &lt;tt&gt;true&lt;/tt&gt; if the file is valid, &lt;tt&gt;false&lt;/tt&gt; otherwise<a name="line.145"></a>
+<span class="sourceLineNo">146</span>   */<a name="line.146"></a>
+<span class="sourceLineNo">147</span>  protected abstract boolean validate(Path file);<a name="line.147"></a>
+<span class="sourceLineNo">148</span><a name="line.148"></a>
+<span class="sourceLineNo">149</span>  /**<a name="line.149"></a>
+<span class="sourceLineNo">150</span>   * Instantiate and initialize all the file cleaners set in the configuration<a name="line.150"></a>
+<span class="sourceLineNo">151</span>   * @param confKey key to get the file cleaner classes from the configuration<a name="line.151"></a>
+<span class="sourceLineNo">152</span>   */<a name="line.152"></a>
+<span class="sourceLineNo">153</span>  private void initCleanerChain(String confKey) {<a name="line.153"></a>
+<span class="sourceLineNo">154</span>    this.cleanersChain = new LinkedList&lt;&gt;();<a name="line.154"></a>
+<span class="sourceLineNo">155</span>    String[] logCleaners = conf.getStrings(confKey);<a name="line.155"></a>
+<span class="sourceLineNo">156</span>    if (logCleaners != null) {<a name="line.156"></a>
+<span class="sourceLineNo">157</span>      for (String className : logCleaners) {<a name="line.157"></a>
+<span class="sourceLineNo">158</span>        T logCleaner = newFileCleaner(className, conf);<a name="line.158"></a>
+<span class="sourceLineNo">159</span>        if (logCleaner != null) {<a name="line.159"></a>
+<span class="sourceLineNo">160</span>          LOG.debug("initialize cleaner=" + className);<a name="line.160"></a>
+<span class="sourceLineNo">161</span>          this.cleanersChain.add(logCleaner);<a name="line.161"></a>
+<span class="sourceLineNo">162</span>        }<a name="line.162"></a>
+<span class="sourceLineNo">163</span>      }<a name="line.163"></a>
+<span class="sourceLineNo">164</span>    }<a name="line.164"></a>
+<span class="sourceLineNo">165</span>  }<a name="line.165"></a>
+<span class="sourceLineNo">166</span><a name="line.166"></a>
+<span class="sourceLineNo">167</span>  @Override<a name="line.167"></a>
+<span class="sourceLineNo">168</span>  public void onConfigurationChange(Configuration conf) {<a name="line.168"></a>
+<span class="sourceLineNo">169</span>    int updatedSize = calculatePoolSize(conf.get(CHORE_POOL_SIZE, DEFAULT_CHORE_POOL_SIZE));<a name="line.169"></a>
+<span class="sourceLineNo">170</span>    if (updatedSize == chorePoolSize) {<a name="line.170"></a>
+<span class="sourceLineNo">171</span>      if (LOG.isDebugEnabled()) {<a name="line.171"></a>
+<span class="sourceLineNo">172</span>        LOG.debug("Size from configuration is the same as previous which is " +<a name="line.172"></a>
+<span class="sourceLineNo">173</span>          updatedSize + ", no need to update.");<a name="line.173"></a>
+<span class="sourceLineNo">174</span>      }<a name="line.174"></a>
+<span class="sourceLineNo">175</span>      return;<a name="line.175"></a>
+<span class="sourceLineNo">176</span>    }<a name="line.176"></a>
+<span class="sourceLineNo">177</span>    chorePoolSize = updatedSize;<a name="line.177"></a>
+<span class="sourceLineNo">178</span>    if (chorePool.getPoolSize() == 0) {<a name="line.178"></a>
+<span class="sourceLineNo">179</span>      // Chore does not work now, update it directly.<a name="line.179"></a>
+<span class="sourceLineNo">180</span>      updateChorePoolSize(updatedSize);<a name="line.180"></a>
+<span class="sourceLineNo">181</span>      return;<a name="line.181"></a>
+<span class="sourceLineNo">182</span>    }<a name="line.182"></a>
+<span class="sourceLineNo">183</span>    // Chore is working, update it after chore finished.<a name="line.183"></a>
+<span class="sourceLineNo">184</span>    reconfig.set(true);<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>  private void updateChorePoolSize(int updatedSize) {<a name="line.187"></a>
+<span class="sourceLineNo">188</span>    chorePool.shutdownNow();<a name="line.188"></a>
+<span class="sourceLineNo">189</span>    LOG.info("Update chore's pool size from " +<a name="line.189"></a>
+<span class="sourceLineNo">190</span>        chorePool.getParallelism() + " to " + updatedSize);<a name="line.190"></a>
+<span class="sourceLineNo">191</span>    chorePool = new ForkJoinPool(updatedSize);<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 utility method to create new instances of LogCleanerDelegate based on the class name of the<a name="line.195"></a>
+<span class="sourceLineNo">196</span>   * LogCleanerDelegate.<a name="line.196"></a>
+<span class="sourceLineNo">197</span>   * @param className fully qualified class name of the LogCleanerDelegate<a name="line.197"></a>
+<span class="sourceLineNo">198</span>   * @param conf used configuration<a name="line.198"></a>
+<span class="sourceLineNo">199</span>   * @return the new instance<a name="line.199"></a>
+<span class="sourceLineNo">200</span>   */<a name="line.200"></a>
+<span class="sourceLineNo">201</span>  private T newFileCleaner(String className, Configuration conf) {<a name="line.201"></a>
+<span class="sourceLineNo">202</span>    try {<a name="line.202"></a>
+<span class="sourceLineNo">203</span>      Class&lt;? extends FileCleanerDelegate&gt; c = Class.forName(className).asSubclass(<a name="line.203"></a>
+<span class="sourceLineNo">204</span>        FileCleanerDelegate.class);<a name="line.204"></a>
+<span class="sourceLineNo">205</span>      @SuppressWarnings("unchecked")<a name="line.205"></a>
+<span class="sourceLineNo">206</span>      T cleaner = (T) c.newInstance();<a name="line.206"></a>
+<span class="sourceLineNo">207</span>      cleaner.setConf(conf);<a name="line.207"></a>
+<span class="sourceLineNo">208</span>      cleaner.init(this.params);<a name="line.208"></a>
+<span class="sourceLineNo">209</span>      return cleaner;<a name="line.209"></a>
+<span class="sourceLineNo">210</span>    } catch (Exception e) {<a name="line.210"></a>
+<span class="sourceLineNo">211</span>      LOG.warn("Can NOT create CleanerDelegate: " + className, e);<a name="line.211"></a>
+<span class="sourceLineNo">212</span>      // skipping if can't instantiate<a name="line.212"></a>
+<span class="sourceLineNo">213</span>      return null;<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><a name="line.216"></a>
+<span class="sourceLineNo">217</span>  @Override<a name="line.217"></a>
+<span class="sourceLineNo">218</span>  protected void chore() {<a name="line.218"></a>
+<span class="sourceLineNo">219</span>    if (getEnabled()) {<a name="line.219"></a>
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+<span class="sourceLineNo">221</span>        if (LOG.isDebugEnabled()) {<a name="line.221"></a>
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+<span class="sourceLineNo">467</span>     * @throws IOException if there's no such a directory<a name="line.467"></a>
+<span class="sourceLineNo">468</span>     */<a name="line.468"></a>
+<span class="sourceLineNo">469</span>    private List&lt;FileStatus&gt; getFilteredStatus(Predicate&lt;FileStatus&gt; function) throws IOException {<a name="line.469"></a>
+<span class="sourceLineNo">470</span>      return FSUtils.listStatusWithStatusFilter(fs, dir, status -&gt; function.test(status));<a name="line.470"></a>
+<span class="sourceLineNo">471</span>    }<a name="line.471"></a>
+<span class="sourceLineNo">472</span><a name="line.472"></a>
+<span class="sourceLineNo">473</span>    /**<a name="line.473"></a>
+<span class="sourceLineNo">474</span>     * Perform a delete on a specified type.<a name="line.474"></a>
+<span class="sourceLineNo">475</span>     * @param deletion a delete<a name="line.475"></a>
+<span class="sourceLineNo">476</span>     * @param type possible values are 'files', 'subdirs', 'dirs'<a name="line.476"></a>
+<span class="sourceLineNo">477</span>     * @return true if it deleted successfully, false otherwise<a name="line.477"></a>
+<span class="sourceLineNo">478</span>     */<a name="line.478"></a>
+<span class="sourceLineNo">479</span>    private boolean deleteAction(Action&lt;Boolean&gt; deletion, String type) {<a name="line.479"></a>
+<span class="sourceLineNo">480</span>      boolean deleted;<a name="line.480"></a>
+<span class="sourceLineNo">481</span>      String errorMsg = "";<a name="line.481"></a>
+<span class="sourceLineNo">482</span>      try {<a name="line.482"></a>
+<span class="sourceLineNo">483</span>        if (LOG.isDebugEnabled()) {<a name="line.483"></a>
+<span class="sourceLineNo">484</span>          LOG.debug("Start deleting " + type + " under " + dir);<a name="line.484"></a>
+<span class="sourceLineNo">485</span>        }<a name="line.485"></a>
+<span class="sourceLineNo">486</span>        deleted = deletion.act();<a name="line.486"></a>
+<span class="sourceLineNo">487</span>      } catch (IOException ioe) {<a name="line.487"></a>
+<span class="sourceLineNo">488</span>        errorMsg = ioe.getMessage();<a name="line.488"></a>
+<span class="sourceLineNo">489</span>        deleted = false;<a name="line.489"></a>
+<span class="sourceLineNo">490</span>      }<a name="line.490"></a>
+<span class="sourceLineNo">491</span>      if (LOG.isDebugEnabled()) {<a name="line.491"></a>
+<span class="sourceLineNo">492</span>        if (deleted) {<a name="line.492"></a>
+<span class="sourceLineNo">493</span>          LOG.debug("Finish deleting " + type + " under " + dir);<a name="line.493"></a>
+<span class="sourceLineNo">494</span>        } else {<a name="line.494"></a>
+<span class="sourceLineNo">495</span>          LOG.debug("Couldn't delete " + type + " completely under " + dir +<a name="line.495"></a>
+<span class="sourceLineNo">496</span>            " with reasons: " + (!errorMsg.equals("") ? errorMsg : " undeletable, please check."));<a name="line.496"></a>
+<span class="sourceLineNo">497</span>        }<a name="line.497"></a>
+<span class="sourceLineNo">498</span>      }<a name="line.498"></a>
+<span class="sourceLineNo">499</span>      return deleted;<a name="line.499"></a>
+<span class="sourceLineNo">500</span>    }<a name="line.500"></a>
+<span class="sourceLineNo">501</span><a name="line.501"></a>
+<span class="sourceLineNo">502</span>    /**<a name="line.502"></a>
+<span class="sourceLineNo">503</span>     * Get cleaner results of subdirs.<a name="line.503"></a>
+<span class="sourceLineNo">504</span>     * @param tasks subdirs cleaner tasks<a name="line.504"></a>
+<span class="sourceLineNo">505</span>     * @return true if all subdirs deleted successfully, false for patial/all failures<a name="line.505"></a>
+<span class="sourceLineNo">506</span>     * @throws IOException something happen during computation<a name="line.506"></a>
+<span class="sourceLineNo">507</span>     */<a name="line.507"></a>
+<span class="sourceLineNo">508</span>    private boolean getCleanRusult(List&lt;CleanerTask&gt; tasks) throws IOException {<a name="line.508"></a>
+<span class="sourceLineNo">509</span>      boolean cleaned = true;<a name="line.509"></a>
+<span class="sourceLineNo">510</span>      try {<a name="line.510"></a>
+<span class="sourceLineNo">511</span>        for (CleanerTask task : tasks) {<a name="line.511"></a>
+<span class="sourceLineNo">512</span>          cleaned &amp;= task.get();<a name="line.512"></a>
+<span class="sourceLineNo">513</span>        }<a name="line.513"></a>
+<span class="sourceLineNo">514</span>      } catch (InterruptedException | ExecutionException e) {<a name="line.514"></a>
+<span class="sourceLineNo">515</span>        throw new IOException(e);<a name="line.515"></a>
+<span class="sourceLineNo">516</span>      }<a name="line.516"></a>
+<span class="sourceLineNo">517</span>      return cleaned;<a name="line.517"></a>
+<span class="sourceLineNo">518</span>    }<a name="line.518"></a>
+<span class="sourceLineNo">519</span>  }<a name="line.519"></a>
+<span class="sourceLineNo">520</span>}<a name="line.520"></a>
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+</pre>
+</div>
+</body>
+</html>


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