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<pre><span class="sourceLineNo">001</span>/*<a name="line.1"></a>
<span class="sourceLineNo">002</span> * Licensed to the Apache Software Foundation (ASF) under one<a name="line.2"></a>
<span class="sourceLineNo">003</span> * or more contributor license agreements. See the NOTICE file<a name="line.3"></a>
<span class="sourceLineNo">004</span> * distributed with this work for additional information<a name="line.4"></a>
<span class="sourceLineNo">005</span> * regarding copyright ownership. The ASF licenses this file<a name="line.5"></a>
<span class="sourceLineNo">006</span> * to you under the Apache License, Version 2.0 (the<a name="line.6"></a>
<span class="sourceLineNo">007</span> * "License"); you may not use this file except in compliance<a name="line.7"></a>
<span class="sourceLineNo">008</span> * with the License. You may obtain a copy of the License at<a name="line.8"></a>
<span class="sourceLineNo">009</span> *<a name="line.9"></a>
<span class="sourceLineNo">010</span> * http://www.apache.org/licenses/LICENSE-2.0<a name="line.10"></a>
<span class="sourceLineNo">011</span> *<a name="line.11"></a>
<span class="sourceLineNo">012</span> * Unless required by applicable law or agreed to in writing, software<a name="line.12"></a>
<span class="sourceLineNo">013</span> * distributed under the License is distributed on an "AS IS" BASIS,<a name="line.13"></a>
<span class="sourceLineNo">014</span> * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.<a name="line.14"></a>
<span class="sourceLineNo">015</span> * See the License for the specific language governing permissions and<a name="line.15"></a>
<span class="sourceLineNo">016</span> * limitations under the License.<a name="line.16"></a>
<span class="sourceLineNo">017</span> */<a name="line.17"></a>
<span class="sourceLineNo">018</span>package org.apache.hadoop.hbase.util.compaction;<a name="line.18"></a>
<span class="sourceLineNo">019</span><a name="line.19"></a>
<span class="sourceLineNo">020</span>import java.util.List;<a name="line.20"></a>
<span class="sourceLineNo">021</span>import java.util.Map;<a name="line.21"></a>
<span class="sourceLineNo">022</span>import java.util.Optional;<a name="line.22"></a>
<span class="sourceLineNo">023</span>import java.util.Set;<a name="line.23"></a>
<span class="sourceLineNo">024</span>import java.util.concurrent.locks.ReadWriteLock;<a name="line.24"></a>
<span class="sourceLineNo">025</span>import java.util.concurrent.locks.ReentrantReadWriteLock;<a name="line.25"></a>
<span class="sourceLineNo">026</span>import org.apache.hadoop.hbase.ServerName;<a name="line.26"></a>
<span class="sourceLineNo">027</span>import org.apache.yetus.audience.InterfaceAudience;<a name="line.27"></a>
<span class="sourceLineNo">028</span><a name="line.28"></a>
<span class="sourceLineNo">029</span>import org.apache.hbase.thirdparty.com.google.common.collect.Lists;<a name="line.29"></a>
<span class="sourceLineNo">030</span>import org.apache.hbase.thirdparty.com.google.common.collect.Maps;<a name="line.30"></a>
<span class="sourceLineNo">031</span>import org.apache.hbase.thirdparty.com.google.common.collect.Sets;<a name="line.31"></a>
<span class="sourceLineNo">032</span><a name="line.32"></a>
<span class="sourceLineNo">033</span>@InterfaceAudience.Private<a name="line.33"></a>
<span class="sourceLineNo">034</span>class ClusterCompactionQueues {<a name="line.34"></a>
<span class="sourceLineNo">035</span><a name="line.35"></a>
<span class="sourceLineNo">036</span> private final Map&lt;ServerName, List&lt;MajorCompactionRequest&gt;&gt; compactionQueues;<a name="line.36"></a>
<span class="sourceLineNo">037</span> private final Set&lt;ServerName&gt; compactingServers;<a name="line.37"></a>
<span class="sourceLineNo">038</span> private final ReadWriteLock lock;<a name="line.38"></a>
<span class="sourceLineNo">039</span> private final int concurrentServers;<a name="line.39"></a>
<span class="sourceLineNo">040</span><a name="line.40"></a>
<span class="sourceLineNo">041</span> ClusterCompactionQueues(int concurrentServers) {<a name="line.41"></a>
<span class="sourceLineNo">042</span> this.concurrentServers = concurrentServers;<a name="line.42"></a>
<span class="sourceLineNo">043</span><a name="line.43"></a>
<span class="sourceLineNo">044</span> this.compactionQueues = Maps.newHashMap();<a name="line.44"></a>
<span class="sourceLineNo">045</span> this.lock = new ReentrantReadWriteLock();<a name="line.45"></a>
<span class="sourceLineNo">046</span> this.compactingServers = Sets.newHashSet();<a name="line.46"></a>
<span class="sourceLineNo">047</span> }<a name="line.47"></a>
<span class="sourceLineNo">048</span><a name="line.48"></a>
<span class="sourceLineNo">049</span> void addToCompactionQueue(ServerName serverName, MajorCompactionRequest info) {<a name="line.49"></a>
<span class="sourceLineNo">050</span> this.lock.writeLock().lock();<a name="line.50"></a>
<span class="sourceLineNo">051</span> try {<a name="line.51"></a>
<span class="sourceLineNo">052</span> List&lt;MajorCompactionRequest&gt; result = this.compactionQueues.get(serverName);<a name="line.52"></a>
<span class="sourceLineNo">053</span> if (result == null) {<a name="line.53"></a>
<span class="sourceLineNo">054</span> result = Lists.newArrayList();<a name="line.54"></a>
<span class="sourceLineNo">055</span> compactionQueues.put(serverName, result);<a name="line.55"></a>
<span class="sourceLineNo">056</span> }<a name="line.56"></a>
<span class="sourceLineNo">057</span> result.add(info);<a name="line.57"></a>
<span class="sourceLineNo">058</span> } finally {<a name="line.58"></a>
<span class="sourceLineNo">059</span> this.lock.writeLock().unlock();<a name="line.59"></a>
<span class="sourceLineNo">060</span> }<a name="line.60"></a>
<span class="sourceLineNo">061</span> }<a name="line.61"></a>
<span class="sourceLineNo">062</span><a name="line.62"></a>
<span class="sourceLineNo">063</span> boolean hasWorkItems() {<a name="line.63"></a>
<span class="sourceLineNo">064</span> lock.readLock().lock();<a name="line.64"></a>
<span class="sourceLineNo">065</span> try {<a name="line.65"></a>
<span class="sourceLineNo">066</span> return !this.compactionQueues.values().stream().allMatch(List::isEmpty);<a name="line.66"></a>
<span class="sourceLineNo">067</span> } finally {<a name="line.67"></a>
<span class="sourceLineNo">068</span> lock.readLock().unlock();<a name="line.68"></a>
<span class="sourceLineNo">069</span> }<a name="line.69"></a>
<span class="sourceLineNo">070</span> }<a name="line.70"></a>
<span class="sourceLineNo">071</span><a name="line.71"></a>
<span class="sourceLineNo">072</span> int getCompactionRequestsLeftToFinish() {<a name="line.72"></a>
<span class="sourceLineNo">073</span> lock.readLock().lock();<a name="line.73"></a>
<span class="sourceLineNo">074</span> try {<a name="line.74"></a>
<span class="sourceLineNo">075</span> int size = 0;<a name="line.75"></a>
<span class="sourceLineNo">076</span> for (List&lt;MajorCompactionRequest&gt; queue : compactionQueues.values()) {<a name="line.76"></a>
<span class="sourceLineNo">077</span> size += queue.size();<a name="line.77"></a>
<span class="sourceLineNo">078</span> }<a name="line.78"></a>
<span class="sourceLineNo">079</span> return size;<a name="line.79"></a>
<span class="sourceLineNo">080</span> } finally {<a name="line.80"></a>
<span class="sourceLineNo">081</span> lock.readLock().unlock();<a name="line.81"></a>
<span class="sourceLineNo">082</span> }<a name="line.82"></a>
<span class="sourceLineNo">083</span> }<a name="line.83"></a>
<span class="sourceLineNo">084</span><a name="line.84"></a>
<span class="sourceLineNo">085</span> List&lt;MajorCompactionRequest&gt; getQueue(ServerName serverName) {<a name="line.85"></a>
<span class="sourceLineNo">086</span> lock.readLock().lock();<a name="line.86"></a>
<span class="sourceLineNo">087</span> try {<a name="line.87"></a>
<span class="sourceLineNo">088</span> return compactionQueues.get(serverName);<a name="line.88"></a>
<span class="sourceLineNo">089</span> } finally {<a name="line.89"></a>
<span class="sourceLineNo">090</span> lock.readLock().unlock();<a name="line.90"></a>
<span class="sourceLineNo">091</span> }<a name="line.91"></a>
<span class="sourceLineNo">092</span> }<a name="line.92"></a>
<span class="sourceLineNo">093</span><a name="line.93"></a>
<span class="sourceLineNo">094</span> MajorCompactionRequest reserveForCompaction(ServerName serverName) {<a name="line.94"></a>
<span class="sourceLineNo">095</span> lock.writeLock().lock();<a name="line.95"></a>
<span class="sourceLineNo">096</span> try {<a name="line.96"></a>
<span class="sourceLineNo">097</span> if (!compactionQueues.get(serverName).isEmpty()) {<a name="line.97"></a>
<span class="sourceLineNo">098</span> compactingServers.add(serverName);<a name="line.98"></a>
<span class="sourceLineNo">099</span> return compactionQueues.get(serverName).remove(0);<a name="line.99"></a>
<span class="sourceLineNo">100</span> }<a name="line.100"></a>
<span class="sourceLineNo">101</span> return null;<a name="line.101"></a>
<span class="sourceLineNo">102</span> } finally {<a name="line.102"></a>
<span class="sourceLineNo">103</span> lock.writeLock().unlock();<a name="line.103"></a>
<span class="sourceLineNo">104</span> }<a name="line.104"></a>
<span class="sourceLineNo">105</span> }<a name="line.105"></a>
<span class="sourceLineNo">106</span><a name="line.106"></a>
<span class="sourceLineNo">107</span> void releaseCompaction(ServerName serverName) {<a name="line.107"></a>
<span class="sourceLineNo">108</span> lock.writeLock().lock();<a name="line.108"></a>
<span class="sourceLineNo">109</span> try {<a name="line.109"></a>
<span class="sourceLineNo">110</span> compactingServers.remove(serverName);<a name="line.110"></a>
<span class="sourceLineNo">111</span> } finally {<a name="line.111"></a>
<span class="sourceLineNo">112</span> lock.writeLock().unlock();<a name="line.112"></a>
<span class="sourceLineNo">113</span> }<a name="line.113"></a>
<span class="sourceLineNo">114</span> }<a name="line.114"></a>
<span class="sourceLineNo">115</span><a name="line.115"></a>
<span class="sourceLineNo">116</span> boolean atCapacity() {<a name="line.116"></a>
<span class="sourceLineNo">117</span> lock.readLock().lock();<a name="line.117"></a>
<span class="sourceLineNo">118</span> try {<a name="line.118"></a>
<span class="sourceLineNo">119</span> return compactingServers.size() &gt;= concurrentServers;<a name="line.119"></a>
<span class="sourceLineNo">120</span> } finally {<a name="line.120"></a>
<span class="sourceLineNo">121</span> lock.readLock().unlock();<a name="line.121"></a>
<span class="sourceLineNo">122</span> }<a name="line.122"></a>
<span class="sourceLineNo">123</span> }<a name="line.123"></a>
<span class="sourceLineNo">124</span><a name="line.124"></a>
<span class="sourceLineNo">125</span> Optional&lt;ServerName&gt; getLargestQueueFromServersNotCompacting() {<a name="line.125"></a>
<span class="sourceLineNo">126</span> lock.readLock().lock();<a name="line.126"></a>
<span class="sourceLineNo">127</span> try {<a name="line.127"></a>
<span class="sourceLineNo">128</span> return compactionQueues.entrySet().stream()<a name="line.128"></a>
<span class="sourceLineNo">129</span> .filter(entry -&gt; !compactingServers.contains(entry.getKey()))<a name="line.129"></a>
<span class="sourceLineNo">130</span> .max(Map.Entry.comparingByValue((o1, o2) -&gt; Integer.compare(o1.size(), o2.size())))<a name="line.130"></a>
<span class="sourceLineNo">131</span> .map(Map.Entry::getKey);<a name="line.131"></a>
<span class="sourceLineNo">132</span> } finally {<a name="line.132"></a>
<span class="sourceLineNo">133</span> lock.readLock().unlock();<a name="line.133"></a>
<span class="sourceLineNo">134</span> }<a name="line.134"></a>
<span class="sourceLineNo">135</span> }<a name="line.135"></a>
<span class="sourceLineNo">136</span><a name="line.136"></a>
<span class="sourceLineNo">137</span>}<a name="line.137"></a>
</pre>
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