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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 <T> 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<T
extends FileCleanerDelegate> 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 >= 1, it
would be the size;<a name="line.60"></a>
+<span class="sourceLineNo">061</span> * if 0.0 < size <= 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<String,
Object> 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<T>
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<String, Object> 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 <tt>true</tt> if
the file is valid, <tt>false</tt> 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<>();<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<? extends
FileCleanerDelegate> 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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not null.<a name="line.464"></a>
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function<a name="line.465"></a>
+<span class="sourceLineNo">466</span> * @return filtered FileStatus<a
name="line.466"></a>
+<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<FileStatus>
getFilteredStatus(Predicate<FileStatus> function) throws IOException {<a
name="line.469"></a>
+<span class="sourceLineNo">470</span> return
FSUtils.listStatusWithStatusFilter(fs, dir, status ->
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<Boolean> 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<CleanerTask> 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 &= 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>
