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<pre><span class="source-line-no">001</span><span id="line-1">/*</span>
<span class="source-line-no">002</span><span id="line-2"> * Licensed to the Apache Software Foundation (ASF) under one</span>
<span class="source-line-no">003</span><span id="line-3"> * or more contributor license agreements. See the NOTICE file</span>
<span class="source-line-no">004</span><span id="line-4"> * distributed with this work for additional information</span>
<span class="source-line-no">005</span><span id="line-5"> * regarding copyright ownership. The ASF licenses this file</span>
<span class="source-line-no">006</span><span id="line-6"> * to you under the Apache License, Version 2.0 (the</span>
<span class="source-line-no">007</span><span id="line-7"> * "License"); you may not use this file except in compliance</span>
<span class="source-line-no">008</span><span id="line-8"> * with the License. You may obtain a copy of the License at</span>
<span class="source-line-no">009</span><span id="line-9"> *</span>
<span class="source-line-no">010</span><span id="line-10"> * http://www.apache.org/licenses/LICENSE-2.0</span>
<span class="source-line-no">011</span><span id="line-11"> *</span>
<span class="source-line-no">012</span><span id="line-12"> * Unless required by applicable law or agreed to in writing, software</span>
<span class="source-line-no">013</span><span id="line-13"> * distributed under the License is distributed on an "AS IS" BASIS,</span>
<span class="source-line-no">014</span><span id="line-14"> * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.</span>
<span class="source-line-no">015</span><span id="line-15"> * See the License for the specific language governing permissions and</span>
<span class="source-line-no">016</span><span id="line-16"> * limitations under the License.</span>
<span class="source-line-no">017</span><span id="line-17"> */</span>
<span class="source-line-no">018</span><span id="line-18">package org.apache.hadoop.hbase.master.assignment;</span>
<span class="source-line-no">019</span><span id="line-19"></span>
<span class="source-line-no">020</span><span id="line-20">import java.util.List;</span>
<span class="source-line-no">021</span><span id="line-21">import java.util.Set;</span>
<span class="source-line-no">022</span><span id="line-22">import java.util.concurrent.ConcurrentHashMap;</span>
<span class="source-line-no">023</span><span id="line-23">import java.util.concurrent.locks.Lock;</span>
<span class="source-line-no">024</span><span id="line-24">import java.util.concurrent.locks.ReadWriteLock;</span>
<span class="source-line-no">025</span><span id="line-25">import java.util.concurrent.locks.ReentrantReadWriteLock;</span>
<span class="source-line-no">026</span><span id="line-26">import java.util.stream.Collectors;</span>
<span class="source-line-no">027</span><span id="line-27">import org.apache.hadoop.hbase.ServerName;</span>
<span class="source-line-no">028</span><span id="line-28">import org.apache.hadoop.hbase.client.RegionInfo;</span>
<span class="source-line-no">029</span><span id="line-29">import org.apache.yetus.audience.InterfaceAudience;</span>
<span class="source-line-no">030</span><span id="line-30"></span>
<span class="source-line-no">031</span><span id="line-31">/**</span>
<span class="source-line-no">032</span><span id="line-32"> * State of Server; list of hosted regions, etc.</span>
<span class="source-line-no">033</span><span id="line-33"> */</span>
<span class="source-line-no">034</span><span id="line-34">@InterfaceAudience.Private</span>
<span class="source-line-no">035</span><span id="line-35">public class ServerStateNode implements Comparable&lt;ServerStateNode&gt; {</span>
<span class="source-line-no">036</span><span id="line-36"> private final Set&lt;RegionStateNode&gt; regions;</span>
<span class="source-line-no">037</span><span id="line-37"> private final ServerName serverName;</span>
<span class="source-line-no">038</span><span id="line-38"> // the lock here is for fencing SCP and TRSP, so not all operations need to hold this lock</span>
<span class="source-line-no">039</span><span id="line-39"> private final ReadWriteLock lock = new ReentrantReadWriteLock();</span>
<span class="source-line-no">040</span><span id="line-40"> private volatile ServerState state = ServerState.ONLINE;</span>
<span class="source-line-no">041</span><span id="line-41"></span>
<span class="source-line-no">042</span><span id="line-42"> public ServerStateNode(ServerName serverName) {</span>
<span class="source-line-no">043</span><span id="line-43"> this.serverName = serverName;</span>
<span class="source-line-no">044</span><span id="line-44"> this.regions = ConcurrentHashMap.newKeySet();</span>
<span class="source-line-no">045</span><span id="line-45"> }</span>
<span class="source-line-no">046</span><span id="line-46"></span>
<span class="source-line-no">047</span><span id="line-47"> public ServerName getServerName() {</span>
<span class="source-line-no">048</span><span id="line-48"> return serverName;</span>
<span class="source-line-no">049</span><span id="line-49"> }</span>
<span class="source-line-no">050</span><span id="line-50"></span>
<span class="source-line-no">051</span><span id="line-51"> public ServerState getState() {</span>
<span class="source-line-no">052</span><span id="line-52"> return state;</span>
<span class="source-line-no">053</span><span id="line-53"> }</span>
<span class="source-line-no">054</span><span id="line-54"></span>
<span class="source-line-no">055</span><span id="line-55"> public boolean isInState(final ServerState... expected) {</span>
<span class="source-line-no">056</span><span id="line-56"> boolean expectedState = false;</span>
<span class="source-line-no">057</span><span id="line-57"> if (expected != null) {</span>
<span class="source-line-no">058</span><span id="line-58"> for (int i = 0; i &lt; expected.length; ++i) {</span>
<span class="source-line-no">059</span><span id="line-59"> expectedState |= (state == expected[i]);</span>
<span class="source-line-no">060</span><span id="line-60"> }</span>
<span class="source-line-no">061</span><span id="line-61"> }</span>
<span class="source-line-no">062</span><span id="line-62"> return expectedState;</span>
<span class="source-line-no">063</span><span id="line-63"> }</span>
<span class="source-line-no">064</span><span id="line-64"></span>
<span class="source-line-no">065</span><span id="line-65"> void setState(final ServerState state) {</span>
<span class="source-line-no">066</span><span id="line-66"> this.state = state;</span>
<span class="source-line-no">067</span><span id="line-67"> }</span>
<span class="source-line-no">068</span><span id="line-68"></span>
<span class="source-line-no">069</span><span id="line-69"> public int getRegionCount() {</span>
<span class="source-line-no">070</span><span id="line-70"> return regions.size();</span>
<span class="source-line-no">071</span><span id="line-71"> }</span>
<span class="source-line-no">072</span><span id="line-72"></span>
<span class="source-line-no">073</span><span id="line-73"> public List&lt;RegionInfo&gt; getRegionInfoList() {</span>
<span class="source-line-no">074</span><span id="line-74"> return regions.stream().map(RegionStateNode::getRegionInfo).collect(Collectors.toList());</span>
<span class="source-line-no">075</span><span id="line-75"> }</span>
<span class="source-line-no">076</span><span id="line-76"></span>
<span class="source-line-no">077</span><span id="line-77"> public List&lt;RegionInfo&gt; getSystemRegionInfoList() {</span>
<span class="source-line-no">078</span><span id="line-78"> return regions.stream().filter(RegionStateNode::isSystemTable)</span>
<span class="source-line-no">079</span><span id="line-79"> .map(RegionStateNode::getRegionInfo).collect(Collectors.toList());</span>
<span class="source-line-no">080</span><span id="line-80"> }</span>
<span class="source-line-no">081</span><span id="line-81"></span>
<span class="source-line-no">082</span><span id="line-82"> public void addRegion(final RegionStateNode regionNode) {</span>
<span class="source-line-no">083</span><span id="line-83"> this.regions.add(regionNode);</span>
<span class="source-line-no">084</span><span id="line-84"> }</span>
<span class="source-line-no">085</span><span id="line-85"></span>
<span class="source-line-no">086</span><span id="line-86"> public void removeRegion(final RegionStateNode regionNode) {</span>
<span class="source-line-no">087</span><span id="line-87"> this.regions.remove(regionNode);</span>
<span class="source-line-no">088</span><span id="line-88"> }</span>
<span class="source-line-no">089</span><span id="line-89"></span>
<span class="source-line-no">090</span><span id="line-90"> public Lock readLock() {</span>
<span class="source-line-no">091</span><span id="line-91"> return lock.readLock();</span>
<span class="source-line-no">092</span><span id="line-92"> }</span>
<span class="source-line-no">093</span><span id="line-93"></span>
<span class="source-line-no">094</span><span id="line-94"> public Lock writeLock() {</span>
<span class="source-line-no">095</span><span id="line-95"> return lock.writeLock();</span>
<span class="source-line-no">096</span><span id="line-96"> }</span>
<span class="source-line-no">097</span><span id="line-97"></span>
<span class="source-line-no">098</span><span id="line-98"> @Override</span>
<span class="source-line-no">099</span><span id="line-99"> public int compareTo(final ServerStateNode other) {</span>
<span class="source-line-no">100</span><span id="line-100"> return getServerName().compareTo(other.getServerName());</span>
<span class="source-line-no">101</span><span id="line-101"> }</span>
<span class="source-line-no">102</span><span id="line-102"></span>
<span class="source-line-no">103</span><span id="line-103"> @Override</span>
<span class="source-line-no">104</span><span id="line-104"> public int hashCode() {</span>
<span class="source-line-no">105</span><span id="line-105"> return getServerName().hashCode();</span>
<span class="source-line-no">106</span><span id="line-106"> }</span>
<span class="source-line-no">107</span><span id="line-107"></span>
<span class="source-line-no">108</span><span id="line-108"> @Override</span>
<span class="source-line-no">109</span><span id="line-109"> public boolean equals(final Object other) {</span>
<span class="source-line-no">110</span><span id="line-110"> if (this == other) {</span>
<span class="source-line-no">111</span><span id="line-111"> return true;</span>
<span class="source-line-no">112</span><span id="line-112"> }</span>
<span class="source-line-no">113</span><span id="line-113"> if (!(other instanceof ServerStateNode)) {</span>
<span class="source-line-no">114</span><span id="line-114"> return false;</span>
<span class="source-line-no">115</span><span id="line-115"> }</span>
<span class="source-line-no">116</span><span id="line-116"> return compareTo((ServerStateNode) other) == 0;</span>
<span class="source-line-no">117</span><span id="line-117"> }</span>
<span class="source-line-no">118</span><span id="line-118"></span>
<span class="source-line-no">119</span><span id="line-119"> @Override</span>
<span class="source-line-no">120</span><span id="line-120"> public String toString() {</span>
<span class="source-line-no">121</span><span id="line-121"> return getServerName() + "/" + getState() + "/regionCount=" + this.regions.size() + "/lock="</span>
<span class="source-line-no">122</span><span id="line-122"> + this.lock;</span>
<span class="source-line-no">123</span><span id="line-123"> }</span>
<span class="source-line-no">124</span><span id="line-124">}</span>
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