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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;</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.io.Serializable;</span>
<span class="source-line-no">021</span><span id="line-21">import java.util.Comparator;</span>
<span class="source-line-no">022</span><span id="line-22">import org.apache.hadoop.hbase.ServerName;</span>
<span class="source-line-no">023</span><span id="line-23">import org.apache.hadoop.hbase.client.RegionInfo;</span>
<span class="source-line-no">024</span><span id="line-24">import org.apache.yetus.audience.InterfaceAudience;</span>
<span class="source-line-no">025</span><span id="line-25">import org.apache.yetus.audience.InterfaceStability;</span>
<span class="source-line-no">026</span><span id="line-26"></span>
<span class="source-line-no">027</span><span id="line-27">/**</span>
<span class="source-line-no">028</span><span id="line-28"> * Stores the plan for the move of an individual region. Contains info for the region being moved,</span>
<span class="source-line-no">029</span><span id="line-29"> * info for the server the region should be moved from, and info for the server the region should be</span>
<span class="source-line-no">030</span><span id="line-30"> * moved to. The comparable implementation of this class compares only the region information and</span>
<span class="source-line-no">031</span><span id="line-31"> * not the source/dest server info.</span>
<span class="source-line-no">032</span><span id="line-32"> */</span>
<span class="source-line-no">033</span><span id="line-33">@InterfaceAudience.LimitedPrivate("Coprocessors")</span>
<span class="source-line-no">034</span><span id="line-34">@InterfaceStability.Evolving</span>
<span class="source-line-no">035</span><span id="line-35">public class RegionPlan implements Comparable&lt;RegionPlan&gt; {</span>
<span class="source-line-no">036</span><span id="line-36"> private final RegionInfo hri;</span>
<span class="source-line-no">037</span><span id="line-37"> private final ServerName source;</span>
<span class="source-line-no">038</span><span id="line-38"> private ServerName dest;</span>
<span class="source-line-no">039</span><span id="line-39"></span>
<span class="source-line-no">040</span><span id="line-40"> public static class RegionPlanComparator implements Comparator&lt;RegionPlan&gt;, Serializable {</span>
<span class="source-line-no">041</span><span id="line-41"> private static final long serialVersionUID = 4213207330485734853L;</span>
<span class="source-line-no">042</span><span id="line-42"></span>
<span class="source-line-no">043</span><span id="line-43"> @Override</span>
<span class="source-line-no">044</span><span id="line-44"> public int compare(RegionPlan l, RegionPlan r) {</span>
<span class="source-line-no">045</span><span id="line-45"> return RegionPlan.compareTo(l, r);</span>
<span class="source-line-no">046</span><span id="line-46"> }</span>
<span class="source-line-no">047</span><span id="line-47"> }</span>
<span class="source-line-no">048</span><span id="line-48"></span>
<span class="source-line-no">049</span><span id="line-49"> /**</span>
<span class="source-line-no">050</span><span id="line-50"> * Instantiate a plan for a region move, moving the specified region from the specified source</span>
<span class="source-line-no">051</span><span id="line-51"> * server to the specified destination server. Destination server can be instantiated as null and</span>
<span class="source-line-no">052</span><span id="line-52"> * later set with {@link #setDestination(ServerName)}.</span>
<span class="source-line-no">053</span><span id="line-53"> * @param hri region to be moved</span>
<span class="source-line-no">054</span><span id="line-54"> * @param source regionserver region should be moved from</span>
<span class="source-line-no">055</span><span id="line-55"> * @param dest regionserver region should be moved to</span>
<span class="source-line-no">056</span><span id="line-56"> */</span>
<span class="source-line-no">057</span><span id="line-57"> public RegionPlan(final RegionInfo hri, ServerName source, ServerName dest) {</span>
<span class="source-line-no">058</span><span id="line-58"> this.hri = hri;</span>
<span class="source-line-no">059</span><span id="line-59"> this.source = source;</span>
<span class="source-line-no">060</span><span id="line-60"> this.dest = dest;</span>
<span class="source-line-no">061</span><span id="line-61"> }</span>
<span class="source-line-no">062</span><span id="line-62"></span>
<span class="source-line-no">063</span><span id="line-63"> /**</span>
<span class="source-line-no">064</span><span id="line-64"> * Set the destination server for the plan for this region.</span>
<span class="source-line-no">065</span><span id="line-65"> */</span>
<span class="source-line-no">066</span><span id="line-66"> public void setDestination(ServerName dest) {</span>
<span class="source-line-no">067</span><span id="line-67"> this.dest = dest;</span>
<span class="source-line-no">068</span><span id="line-68"> }</span>
<span class="source-line-no">069</span><span id="line-69"></span>
<span class="source-line-no">070</span><span id="line-70"> /**</span>
<span class="source-line-no">071</span><span id="line-71"> * Get the source server for the plan for this region.</span>
<span class="source-line-no">072</span><span id="line-72"> * @return server info for source</span>
<span class="source-line-no">073</span><span id="line-73"> */</span>
<span class="source-line-no">074</span><span id="line-74"> public ServerName getSource() {</span>
<span class="source-line-no">075</span><span id="line-75"> return source;</span>
<span class="source-line-no">076</span><span id="line-76"> }</span>
<span class="source-line-no">077</span><span id="line-77"></span>
<span class="source-line-no">078</span><span id="line-78"> /**</span>
<span class="source-line-no">079</span><span id="line-79"> * Get the destination server for the plan for this region.</span>
<span class="source-line-no">080</span><span id="line-80"> * @return server info for destination</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 ServerName getDestination() {</span>
<span class="source-line-no">083</span><span id="line-83"> return dest;</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"> /**</span>
<span class="source-line-no">087</span><span id="line-87"> * Get the encoded region name for the region this plan is for.</span>
<span class="source-line-no">088</span><span id="line-88"> * @return Encoded region name</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 String getRegionName() {</span>
<span class="source-line-no">091</span><span id="line-91"> return this.hri.getEncodedName();</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 RegionInfo getRegionInfo() {</span>
<span class="source-line-no">095</span><span id="line-95"> return this.hri;</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"> /**</span>
<span class="source-line-no">099</span><span id="line-99"> * Compare the region info.</span>
<span class="source-line-no">100</span><span id="line-100"> * @param other region plan you are comparing against</span>
<span class="source-line-no">101</span><span id="line-101"> */</span>
<span class="source-line-no">102</span><span id="line-102"> @Override</span>
<span class="source-line-no">103</span><span id="line-103"> public int compareTo(RegionPlan other) {</span>
<span class="source-line-no">104</span><span id="line-104"> return compareTo(this, other);</span>
<span class="source-line-no">105</span><span id="line-105"> }</span>
<span class="source-line-no">106</span><span id="line-106"></span>
<span class="source-line-no">107</span><span id="line-107"> private static int compareTo(RegionPlan left, RegionPlan right) {</span>
<span class="source-line-no">108</span><span id="line-108"> int result = compareServerName(left.source, right.source);</span>
<span class="source-line-no">109</span><span id="line-109"> if (result != 0) {</span>
<span class="source-line-no">110</span><span id="line-110"> return result;</span>
<span class="source-line-no">111</span><span id="line-111"> }</span>
<span class="source-line-no">112</span><span id="line-112"> if (left.hri == null) {</span>
<span class="source-line-no">113</span><span id="line-113"> if (right.hri != null) {</span>
<span class="source-line-no">114</span><span id="line-114"> return -1;</span>
<span class="source-line-no">115</span><span id="line-115"> }</span>
<span class="source-line-no">116</span><span id="line-116"> } else if (right.hri == null) {</span>
<span class="source-line-no">117</span><span id="line-117"> return +1;</span>
<span class="source-line-no">118</span><span id="line-118"> } else {</span>
<span class="source-line-no">119</span><span id="line-119"> result = RegionInfo.COMPARATOR.compare(left.hri, right.hri);</span>
<span class="source-line-no">120</span><span id="line-120"> }</span>
<span class="source-line-no">121</span><span id="line-121"> if (result != 0) {</span>
<span class="source-line-no">122</span><span id="line-122"> return result;</span>
<span class="source-line-no">123</span><span id="line-123"> }</span>
<span class="source-line-no">124</span><span id="line-124"> return compareServerName(left.dest, right.dest);</span>
<span class="source-line-no">125</span><span id="line-125"> }</span>
<span class="source-line-no">126</span><span id="line-126"></span>
<span class="source-line-no">127</span><span id="line-127"> private static int compareServerName(ServerName left, ServerName right) {</span>
<span class="source-line-no">128</span><span id="line-128"> if (left == null) {</span>
<span class="source-line-no">129</span><span id="line-129"> return right == null ? 0 : -1;</span>
<span class="source-line-no">130</span><span id="line-130"> } else if (right == null) {</span>
<span class="source-line-no">131</span><span id="line-131"> return +1;</span>
<span class="source-line-no">132</span><span id="line-132"> }</span>
<span class="source-line-no">133</span><span id="line-133"> return left.compareTo(right);</span>
<span class="source-line-no">134</span><span id="line-134"> }</span>
<span class="source-line-no">135</span><span id="line-135"></span>
<span class="source-line-no">136</span><span id="line-136"> @Override</span>
<span class="source-line-no">137</span><span id="line-137"> public int hashCode() {</span>
<span class="source-line-no">138</span><span id="line-138"> final int prime = 31;</span>
<span class="source-line-no">139</span><span id="line-139"> int result = 1;</span>
<span class="source-line-no">140</span><span id="line-140"> result = prime * result + ((dest == null) ? 0 : dest.hashCode());</span>
<span class="source-line-no">141</span><span id="line-141"> result = prime * result + ((hri == null) ? 0 : hri.hashCode());</span>
<span class="source-line-no">142</span><span id="line-142"> result = prime * result + ((source == null) ? 0 : source.hashCode());</span>
<span class="source-line-no">143</span><span id="line-143"> return result;</span>
<span class="source-line-no">144</span><span id="line-144"> }</span>
<span class="source-line-no">145</span><span id="line-145"></span>
<span class="source-line-no">146</span><span id="line-146"> @Override</span>
<span class="source-line-no">147</span><span id="line-147"> public boolean equals(Object obj) {</span>
<span class="source-line-no">148</span><span id="line-148"> if (this == obj) {</span>
<span class="source-line-no">149</span><span id="line-149"> return true;</span>
<span class="source-line-no">150</span><span id="line-150"> }</span>
<span class="source-line-no">151</span><span id="line-151"> if (!(obj instanceof RegionPlan)) {</span>
<span class="source-line-no">152</span><span id="line-152"> return false;</span>
<span class="source-line-no">153</span><span id="line-153"> }</span>
<span class="source-line-no">154</span><span id="line-154"> RegionPlan other = (RegionPlan) obj;</span>
<span class="source-line-no">155</span><span id="line-155"> if (dest == null) {</span>
<span class="source-line-no">156</span><span id="line-156"> if (other.dest != null) {</span>
<span class="source-line-no">157</span><span id="line-157"> return false;</span>
<span class="source-line-no">158</span><span id="line-158"> }</span>
<span class="source-line-no">159</span><span id="line-159"> } else if (!dest.equals(other.dest)) {</span>
<span class="source-line-no">160</span><span id="line-160"> return false;</span>
<span class="source-line-no">161</span><span id="line-161"> }</span>
<span class="source-line-no">162</span><span id="line-162"> if (hri == null) {</span>
<span class="source-line-no">163</span><span id="line-163"> if (other.hri != null) {</span>
<span class="source-line-no">164</span><span id="line-164"> return false;</span>
<span class="source-line-no">165</span><span id="line-165"> }</span>
<span class="source-line-no">166</span><span id="line-166"> } else if (!hri.equals(other.hri)) {</span>
<span class="source-line-no">167</span><span id="line-167"> return false;</span>
<span class="source-line-no">168</span><span id="line-168"> }</span>
<span class="source-line-no">169</span><span id="line-169"> if (source == null) {</span>
<span class="source-line-no">170</span><span id="line-170"> if (other.source != null) {</span>
<span class="source-line-no">171</span><span id="line-171"> return false;</span>
<span class="source-line-no">172</span><span id="line-172"> }</span>
<span class="source-line-no">173</span><span id="line-173"> } else if (!source.equals(other.source)) {</span>
<span class="source-line-no">174</span><span id="line-174"> return false;</span>
<span class="source-line-no">175</span><span id="line-175"> }</span>
<span class="source-line-no">176</span><span id="line-176"> return true;</span>
<span class="source-line-no">177</span><span id="line-177"> }</span>
<span class="source-line-no">178</span><span id="line-178"></span>
<span class="source-line-no">179</span><span id="line-179"> @Override</span>
<span class="source-line-no">180</span><span id="line-180"> public String toString() {</span>
<span class="source-line-no">181</span><span id="line-181"> return "hri=" + this.hri.getEncodedName() + ", source="</span>
<span class="source-line-no">182</span><span id="line-182"> + (this.source == null ? "" : this.source.toString()) + ", destination="</span>
<span class="source-line-no">183</span><span id="line-183"> + (this.dest == null ? "" : this.dest.toString());</span>
<span class="source-line-no">184</span><span id="line-184"> }</span>
<span class="source-line-no">185</span><span id="line-185">}</span>
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