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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;</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.Arrays;</span> |
| <span class="source-line-no">021</span><span id="line-21">import java.util.Collection;</span> |
| <span class="source-line-no">022</span><span id="line-22">import java.util.Iterator;</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.hadoop.hbase.client.RegionReplicaUtil;</span> |
| <span class="source-line-no">025</span><span id="line-25">import org.apache.hadoop.hbase.util.Bytes;</span> |
| <span class="source-line-no">026</span><span id="line-26">import org.apache.yetus.audience.InterfaceAudience;</span> |
| <span class="source-line-no">027</span><span id="line-27"></span> |
| <span class="source-line-no">028</span><span id="line-28">/**</span> |
| <span class="source-line-no">029</span><span id="line-29"> * Container for holding a list of {@link HRegionLocation}'s that correspond to the same range. The</span> |
| <span class="source-line-no">030</span><span id="line-30"> * list is indexed by the replicaId. This is an immutable list, however mutation operations are</span> |
| <span class="source-line-no">031</span><span id="line-31"> * provided which returns a new List via copy-on-write (assuming small number of locations)</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.Private</span> |
| <span class="source-line-no">034</span><span id="line-34">public class RegionLocations implements Iterable<HRegionLocation> {</span> |
| <span class="source-line-no">035</span><span id="line-35"></span> |
| <span class="source-line-no">036</span><span id="line-36"> private final int numNonNullElements;</span> |
| <span class="source-line-no">037</span><span id="line-37"></span> |
| <span class="source-line-no">038</span><span id="line-38"> // locations array contains the HRL objects for known region replicas indexes by the replicaId.</span> |
| <span class="source-line-no">039</span><span id="line-39"> // elements can be null if the region replica is not known at all. A null value indicates</span> |
| <span class="source-line-no">040</span><span id="line-40"> // that there is a region replica with the index as replicaId, but the location is not known</span> |
| <span class="source-line-no">041</span><span id="line-41"> // in the cache.</span> |
| <span class="source-line-no">042</span><span id="line-42"> private final HRegionLocation[] locations; // replicaId -> HRegionLocation.</span> |
| <span class="source-line-no">043</span><span id="line-43"></span> |
| <span class="source-line-no">044</span><span id="line-44"> /**</span> |
| <span class="source-line-no">045</span><span id="line-45"> * Constructs the region location list. The locations array should contain all the locations for</span> |
| <span class="source-line-no">046</span><span id="line-46"> * known replicas for the region, and should be sorted in replicaId ascending order, although it</span> |
| <span class="source-line-no">047</span><span id="line-47"> * can contain nulls indicating replicaIds that the locations of which are not known.</span> |
| <span class="source-line-no">048</span><span id="line-48"> * @param locations an array of HRegionLocations for the same region range</span> |
| <span class="source-line-no">049</span><span id="line-49"> */</span> |
| <span class="source-line-no">050</span><span id="line-50"> public RegionLocations(HRegionLocation... locations) {</span> |
| <span class="source-line-no">051</span><span id="line-51"> int numNonNullElements = 0;</span> |
| <span class="source-line-no">052</span><span id="line-52"> int maxReplicaId = -1;</span> |
| <span class="source-line-no">053</span><span id="line-53"> int maxReplicaIdIndex = -1;</span> |
| <span class="source-line-no">054</span><span id="line-54"> int index = 0;</span> |
| <span class="source-line-no">055</span><span id="line-55"> for (HRegionLocation loc : locations) {</span> |
| <span class="source-line-no">056</span><span id="line-56"> if (loc != null) {</span> |
| <span class="source-line-no">057</span><span id="line-57"> if (loc.getRegion().getReplicaId() >= maxReplicaId) {</span> |
| <span class="source-line-no">058</span><span id="line-58"> maxReplicaId = loc.getRegion().getReplicaId();</span> |
| <span class="source-line-no">059</span><span id="line-59"> maxReplicaIdIndex = index;</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"> index++;</span> |
| <span class="source-line-no">063</span><span id="line-63"> }</span> |
| <span class="source-line-no">064</span><span id="line-64"> // account for the null elements in the array after maxReplicaIdIndex</span> |
| <span class="source-line-no">065</span><span id="line-65"> maxReplicaId = maxReplicaId + (locations.length - (maxReplicaIdIndex + 1));</span> |
| <span class="source-line-no">066</span><span id="line-66"></span> |
| <span class="source-line-no">067</span><span id="line-67"> if (maxReplicaId + 1 == locations.length) {</span> |
| <span class="source-line-no">068</span><span id="line-68"> this.locations = locations;</span> |
| <span class="source-line-no">069</span><span id="line-69"> } else {</span> |
| <span class="source-line-no">070</span><span id="line-70"> this.locations = new HRegionLocation[maxReplicaId + 1];</span> |
| <span class="source-line-no">071</span><span id="line-71"> for (HRegionLocation loc : locations) {</span> |
| <span class="source-line-no">072</span><span id="line-72"> if (loc != null) {</span> |
| <span class="source-line-no">073</span><span id="line-73"> this.locations[loc.getRegion().getReplicaId()] = loc;</span> |
| <span class="source-line-no">074</span><span id="line-74"> }</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"> for (HRegionLocation loc : this.locations) {</span> |
| <span class="source-line-no">078</span><span id="line-78"> if (loc != null && loc.getServerName() != null) {</span> |
| <span class="source-line-no">079</span><span id="line-79"> numNonNullElements++;</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"> this.numNonNullElements = numNonNullElements;</span> |
| <span class="source-line-no">083</span><span id="line-83"> }</span> |
| <span class="source-line-no">084</span><span id="line-84"></span> |
| <span class="source-line-no">085</span><span id="line-85"> public RegionLocations(Collection<HRegionLocation> locations) {</span> |
| <span class="source-line-no">086</span><span id="line-86"> this(locations.toArray(new HRegionLocation[locations.size()]));</span> |
| <span class="source-line-no">087</span><span id="line-87"> }</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"> * Returns the size of the list even if some of the elements might be null.</span> |
| <span class="source-line-no">091</span><span id="line-91"> * @return the size of the list (corresponding to the max replicaId)</span> |
| <span class="source-line-no">092</span><span id="line-92"> */</span> |
| <span class="source-line-no">093</span><span id="line-93"> public int size() {</span> |
| <span class="source-line-no">094</span><span id="line-94"> return locations.length;</span> |
| <span class="source-line-no">095</span><span id="line-95"> }</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"> * Returns the size of not-null locations</span> |
| <span class="source-line-no">099</span><span id="line-99"> * @return the size of not-null locations</span> |
| <span class="source-line-no">100</span><span id="line-100"> */</span> |
| <span class="source-line-no">101</span><span id="line-101"> public int numNonNullElements() {</span> |
| <span class="source-line-no">102</span><span id="line-102"> return numNonNullElements;</span> |
| <span class="source-line-no">103</span><span id="line-103"> }</span> |
| <span class="source-line-no">104</span><span id="line-104"></span> |
| <span class="source-line-no">105</span><span id="line-105"> /**</span> |
| <span class="source-line-no">106</span><span id="line-106"> * Returns whether there are non-null elements in the list</span> |
| <span class="source-line-no">107</span><span id="line-107"> * @return whether there are non-null elements in the list</span> |
| <span class="source-line-no">108</span><span id="line-108"> */</span> |
| <span class="source-line-no">109</span><span id="line-109"> public boolean isEmpty() {</span> |
| <span class="source-line-no">110</span><span id="line-110"> return numNonNullElements == 0;</span> |
| <span class="source-line-no">111</span><span id="line-111"> }</span> |
| <span class="source-line-no">112</span><span id="line-112"></span> |
| <span class="source-line-no">113</span><span id="line-113"> /**</span> |
| <span class="source-line-no">114</span><span id="line-114"> * Returns a new RegionLocations with the locations removed (set to null) which have the</span> |
| <span class="source-line-no">115</span><span id="line-115"> * destination server as given.</span> |
| <span class="source-line-no">116</span><span id="line-116"> * @param serverName the serverName to remove locations of</span> |
| <span class="source-line-no">117</span><span id="line-117"> * @return an RegionLocations object with removed locations or the same object if nothing is</span> |
| <span class="source-line-no">118</span><span id="line-118"> * removed</span> |
| <span class="source-line-no">119</span><span id="line-119"> */</span> |
| <span class="source-line-no">120</span><span id="line-120"> public RegionLocations removeByServer(ServerName serverName) {</span> |
| <span class="source-line-no">121</span><span id="line-121"> HRegionLocation[] newLocations = null;</span> |
| <span class="source-line-no">122</span><span id="line-122"> for (int i = 0; i < locations.length; i++) {</span> |
| <span class="source-line-no">123</span><span id="line-123"> // check whether something to remove</span> |
| <span class="source-line-no">124</span><span id="line-124"> if (locations[i] != null && serverName.equals(locations[i].getServerName())) {</span> |
| <span class="source-line-no">125</span><span id="line-125"> if (newLocations == null) { // first time</span> |
| <span class="source-line-no">126</span><span id="line-126"> newLocations = new HRegionLocation[locations.length];</span> |
| <span class="source-line-no">127</span><span id="line-127"> System.arraycopy(locations, 0, newLocations, 0, i);</span> |
| <span class="source-line-no">128</span><span id="line-128"> }</span> |
| <span class="source-line-no">129</span><span id="line-129"> newLocations[i] = null;</span> |
| <span class="source-line-no">130</span><span id="line-130"> } else if (newLocations != null) {</span> |
| <span class="source-line-no">131</span><span id="line-131"> newLocations[i] = locations[i];</span> |
| <span class="source-line-no">132</span><span id="line-132"> }</span> |
| <span class="source-line-no">133</span><span id="line-133"> }</span> |
| <span class="source-line-no">134</span><span id="line-134"> return newLocations == null ? this : new RegionLocations(newLocations);</span> |
| <span class="source-line-no">135</span><span id="line-135"> }</span> |
| <span class="source-line-no">136</span><span id="line-136"></span> |
| <span class="source-line-no">137</span><span id="line-137"> /**</span> |
| <span class="source-line-no">138</span><span id="line-138"> * Removes the given location from the list</span> |
| <span class="source-line-no">139</span><span id="line-139"> * @param location the location to remove</span> |
| <span class="source-line-no">140</span><span id="line-140"> * @return an RegionLocations object with removed locations or the same object if nothing is</span> |
| <span class="source-line-no">141</span><span id="line-141"> * removed</span> |
| <span class="source-line-no">142</span><span id="line-142"> */</span> |
| <span class="source-line-no">143</span><span id="line-143"> public RegionLocations remove(HRegionLocation location) {</span> |
| <span class="source-line-no">144</span><span id="line-144"> if (location == null) return this;</span> |
| <span class="source-line-no">145</span><span id="line-145"> if (location.getRegion() == null) return this;</span> |
| <span class="source-line-no">146</span><span id="line-146"> int replicaId = location.getRegion().getReplicaId();</span> |
| <span class="source-line-no">147</span><span id="line-147"> if (replicaId >= locations.length) return this;</span> |
| <span class="source-line-no">148</span><span id="line-148"></span> |
| <span class="source-line-no">149</span><span id="line-149"> // check whether something to remove. HRL.compareTo() compares ONLY the</span> |
| <span class="source-line-no">150</span><span id="line-150"> // serverName. We want to compare the HRI's as well.</span> |
| <span class="source-line-no">151</span><span id="line-151"> if (</span> |
| <span class="source-line-no">152</span><span id="line-152"> locations[replicaId] == null</span> |
| <span class="source-line-no">153</span><span id="line-153"> || RegionInfo.COMPARATOR.compare(location.getRegion(), locations[replicaId].getRegion())</span> |
| <span class="source-line-no">154</span><span id="line-154"> != 0</span> |
| <span class="source-line-no">155</span><span id="line-155"> || !location.equals(locations[replicaId])</span> |
| <span class="source-line-no">156</span><span id="line-156"> ) {</span> |
| <span class="source-line-no">157</span><span id="line-157"> return this;</span> |
| <span class="source-line-no">158</span><span id="line-158"> }</span> |
| <span class="source-line-no">159</span><span id="line-159"></span> |
| <span class="source-line-no">160</span><span id="line-160"> HRegionLocation[] newLocations = new HRegionLocation[locations.length];</span> |
| <span class="source-line-no">161</span><span id="line-161"> System.arraycopy(locations, 0, newLocations, 0, locations.length);</span> |
| <span class="source-line-no">162</span><span id="line-162"> newLocations[replicaId] = null;</span> |
| <span class="source-line-no">163</span><span id="line-163"></span> |
| <span class="source-line-no">164</span><span id="line-164"> return new RegionLocations(newLocations);</span> |
| <span class="source-line-no">165</span><span id="line-165"> }</span> |
| <span class="source-line-no">166</span><span id="line-166"></span> |
| <span class="source-line-no">167</span><span id="line-167"> /**</span> |
| <span class="source-line-no">168</span><span id="line-168"> * Removes location of the given replicaId from the list</span> |
| <span class="source-line-no">169</span><span id="line-169"> * @param replicaId the replicaId of the location to remove</span> |
| <span class="source-line-no">170</span><span id="line-170"> * @return an RegionLocations object with removed locations or the same object if nothing is</span> |
| <span class="source-line-no">171</span><span id="line-171"> * removed</span> |
| <span class="source-line-no">172</span><span id="line-172"> */</span> |
| <span class="source-line-no">173</span><span id="line-173"> public RegionLocations remove(int replicaId) {</span> |
| <span class="source-line-no">174</span><span id="line-174"> if (getRegionLocation(replicaId) == null) {</span> |
| <span class="source-line-no">175</span><span id="line-175"> return this;</span> |
| <span class="source-line-no">176</span><span id="line-176"> }</span> |
| <span class="source-line-no">177</span><span id="line-177"></span> |
| <span class="source-line-no">178</span><span id="line-178"> HRegionLocation[] newLocations = new HRegionLocation[locations.length];</span> |
| <span class="source-line-no">179</span><span id="line-179"></span> |
| <span class="source-line-no">180</span><span id="line-180"> System.arraycopy(locations, 0, newLocations, 0, locations.length);</span> |
| <span class="source-line-no">181</span><span id="line-181"> if (replicaId < newLocations.length) {</span> |
| <span class="source-line-no">182</span><span id="line-182"> newLocations[replicaId] = null;</span> |
| <span class="source-line-no">183</span><span id="line-183"> }</span> |
| <span class="source-line-no">184</span><span id="line-184"></span> |
| <span class="source-line-no">185</span><span id="line-185"> return new RegionLocations(newLocations);</span> |
| <span class="source-line-no">186</span><span id="line-186"> }</span> |
| <span class="source-line-no">187</span><span id="line-187"></span> |
| <span class="source-line-no">188</span><span id="line-188"> /**</span> |
| <span class="source-line-no">189</span><span id="line-189"> * Set the element to null if its getServerName method returns null. Returns null if all the</span> |
| <span class="source-line-no">190</span><span id="line-190"> * elements are removed.</span> |
| <span class="source-line-no">191</span><span id="line-191"> */</span> |
| <span class="source-line-no">192</span><span id="line-192"> public RegionLocations removeElementsWithNullLocation() {</span> |
| <span class="source-line-no">193</span><span id="line-193"> HRegionLocation[] newLocations = new HRegionLocation[locations.length];</span> |
| <span class="source-line-no">194</span><span id="line-194"> boolean hasNonNullElement = false;</span> |
| <span class="source-line-no">195</span><span id="line-195"> for (int i = 0; i < locations.length; i++) {</span> |
| <span class="source-line-no">196</span><span id="line-196"> if (locations[i] != null && locations[i].getServerName() != null) {</span> |
| <span class="source-line-no">197</span><span id="line-197"> hasNonNullElement = true;</span> |
| <span class="source-line-no">198</span><span id="line-198"> newLocations[i] = locations[i];</span> |
| <span class="source-line-no">199</span><span id="line-199"> }</span> |
| <span class="source-line-no">200</span><span id="line-200"> }</span> |
| <span class="source-line-no">201</span><span id="line-201"> return hasNonNullElement ? new RegionLocations(newLocations) : null;</span> |
| <span class="source-line-no">202</span><span id="line-202"> }</span> |
| <span class="source-line-no">203</span><span id="line-203"></span> |
| <span class="source-line-no">204</span><span id="line-204"> /**</span> |
| <span class="source-line-no">205</span><span id="line-205"> * Merges this RegionLocations list with the given list assuming same range, and keeping the most</span> |
| <span class="source-line-no">206</span><span id="line-206"> * up to date version of the HRegionLocation entries from either list according to seqNum. If</span> |
| <span class="source-line-no">207</span><span id="line-207"> * seqNums are equal, the location from the argument (other) is taken.</span> |
| <span class="source-line-no">208</span><span id="line-208"> * @param other the locations to merge with</span> |
| <span class="source-line-no">209</span><span id="line-209"> * @return an RegionLocations object with merged locations or the same object if nothing is merged</span> |
| <span class="source-line-no">210</span><span id="line-210"> */</span> |
| <span class="source-line-no">211</span><span id="line-211"> @SuppressWarnings("ReferenceEquality")</span> |
| <span class="source-line-no">212</span><span id="line-212"> public RegionLocations mergeLocations(RegionLocations other) {</span> |
| <span class="source-line-no">213</span><span id="line-213"> assert other != null;</span> |
| <span class="source-line-no">214</span><span id="line-214"></span> |
| <span class="source-line-no">215</span><span id="line-215"> HRegionLocation[] newLocations = null;</span> |
| <span class="source-line-no">216</span><span id="line-216"></span> |
| <span class="source-line-no">217</span><span id="line-217"> // Use the length from other, since it is coming from meta. Otherwise,</span> |
| <span class="source-line-no">218</span><span id="line-218"> // in case of region replication going down, we might have a leak here.</span> |
| <span class="source-line-no">219</span><span id="line-219"> int max = other.locations.length;</span> |
| <span class="source-line-no">220</span><span id="line-220"></span> |
| <span class="source-line-no">221</span><span id="line-221"> RegionInfo regionInfo = null;</span> |
| <span class="source-line-no">222</span><span id="line-222"> for (int i = 0; i < max; i++) {</span> |
| <span class="source-line-no">223</span><span id="line-223"> HRegionLocation thisLoc = this.getRegionLocation(i);</span> |
| <span class="source-line-no">224</span><span id="line-224"> HRegionLocation otherLoc = other.getRegionLocation(i);</span> |
| <span class="source-line-no">225</span><span id="line-225"> if (regionInfo == null && otherLoc != null && otherLoc.getRegion() != null) {</span> |
| <span class="source-line-no">226</span><span id="line-226"> // regionInfo is the first non-null HRI from other RegionLocations. We use it to ensure that</span> |
| <span class="source-line-no">227</span><span id="line-227"> // all replica region infos belong to the same region with same region id.</span> |
| <span class="source-line-no">228</span><span id="line-228"> regionInfo = otherLoc.getRegion();</span> |
| <span class="source-line-no">229</span><span id="line-229"> }</span> |
| <span class="source-line-no">230</span><span id="line-230"></span> |
| <span class="source-line-no">231</span><span id="line-231"> HRegionLocation selectedLoc = selectRegionLocation(thisLoc, otherLoc, true, false);</span> |
| <span class="source-line-no">232</span><span id="line-232"></span> |
| <span class="source-line-no">233</span><span id="line-233"> if (selectedLoc != thisLoc) {</span> |
| <span class="source-line-no">234</span><span id="line-234"> if (newLocations == null) {</span> |
| <span class="source-line-no">235</span><span id="line-235"> newLocations = new HRegionLocation[max];</span> |
| <span class="source-line-no">236</span><span id="line-236"> System.arraycopy(locations, 0, newLocations, 0, i);</span> |
| <span class="source-line-no">237</span><span id="line-237"> }</span> |
| <span class="source-line-no">238</span><span id="line-238"> }</span> |
| <span class="source-line-no">239</span><span id="line-239"> if (newLocations != null) {</span> |
| <span class="source-line-no">240</span><span id="line-240"> newLocations[i] = selectedLoc;</span> |
| <span class="source-line-no">241</span><span id="line-241"> }</span> |
| <span class="source-line-no">242</span><span id="line-242"> }</span> |
| <span class="source-line-no">243</span><span id="line-243"></span> |
| <span class="source-line-no">244</span><span id="line-244"> // ensure that all replicas share the same start code. Otherwise delete them</span> |
| <span class="source-line-no">245</span><span id="line-245"> if (newLocations != null && regionInfo != null) {</span> |
| <span class="source-line-no">246</span><span id="line-246"> for (int i = 0; i < newLocations.length; i++) {</span> |
| <span class="source-line-no">247</span><span id="line-247"> if (newLocations[i] != null) {</span> |
| <span class="source-line-no">248</span><span id="line-248"> if (!RegionReplicaUtil.isReplicasForSameRegion(regionInfo, newLocations[i].getRegion())) {</span> |
| <span class="source-line-no">249</span><span id="line-249"> newLocations[i] = null;</span> |
| <span class="source-line-no">250</span><span id="line-250"> }</span> |
| <span class="source-line-no">251</span><span id="line-251"> }</span> |
| <span class="source-line-no">252</span><span id="line-252"> }</span> |
| <span class="source-line-no">253</span><span id="line-253"> }</span> |
| <span class="source-line-no">254</span><span id="line-254"></span> |
| <span class="source-line-no">255</span><span id="line-255"> return newLocations == null ? this : new RegionLocations(newLocations);</span> |
| <span class="source-line-no">256</span><span id="line-256"> }</span> |
| <span class="source-line-no">257</span><span id="line-257"></span> |
| <span class="source-line-no">258</span><span id="line-258"> private HRegionLocation selectRegionLocation(HRegionLocation oldLocation,</span> |
| <span class="source-line-no">259</span><span id="line-259"> HRegionLocation location, boolean checkForEquals, boolean force) {</span> |
| <span class="source-line-no">260</span><span id="line-260"> if (location == null) {</span> |
| <span class="source-line-no">261</span><span id="line-261"> return oldLocation == null ? null : oldLocation;</span> |
| <span class="source-line-no">262</span><span id="line-262"> }</span> |
| <span class="source-line-no">263</span><span id="line-263"></span> |
| <span class="source-line-no">264</span><span id="line-264"> if (oldLocation == null) {</span> |
| <span class="source-line-no">265</span><span id="line-265"> return location;</span> |
| <span class="source-line-no">266</span><span id="line-266"> }</span> |
| <span class="source-line-no">267</span><span id="line-267"></span> |
| <span class="source-line-no">268</span><span id="line-268"> if (force || isGreaterThan(location.getSeqNum(), oldLocation.getSeqNum(), checkForEquals)) {</span> |
| <span class="source-line-no">269</span><span id="line-269"> return location;</span> |
| <span class="source-line-no">270</span><span id="line-270"> }</span> |
| <span class="source-line-no">271</span><span id="line-271"> return oldLocation;</span> |
| <span class="source-line-no">272</span><span id="line-272"> }</span> |
| <span class="source-line-no">273</span><span id="line-273"></span> |
| <span class="source-line-no">274</span><span id="line-274"> /**</span> |
| <span class="source-line-no">275</span><span id="line-275"> * Updates the location with new only if the new location has a higher seqNum than the old one or</span> |
| <span class="source-line-no">276</span><span id="line-276"> * force is true.</span> |
| <span class="source-line-no">277</span><span id="line-277"> * @param location the location to add or update</span> |
| <span class="source-line-no">278</span><span id="line-278"> * @param checkForEquals whether to update the location if seqNums for the HRegionLocations for</span> |
| <span class="source-line-no">279</span><span id="line-279"> * the old and new location are the same</span> |
| <span class="source-line-no">280</span><span id="line-280"> * @param force whether to force update</span> |
| <span class="source-line-no">281</span><span id="line-281"> * @return an RegionLocations object with updated locations or the same object if nothing is</span> |
| <span class="source-line-no">282</span><span id="line-282"> * updated</span> |
| <span class="source-line-no">283</span><span id="line-283"> */</span> |
| <span class="source-line-no">284</span><span id="line-284"> @SuppressWarnings("ReferenceEquality")</span> |
| <span class="source-line-no">285</span><span id="line-285"> public RegionLocations updateLocation(HRegionLocation location, boolean checkForEquals,</span> |
| <span class="source-line-no">286</span><span id="line-286"> boolean force) {</span> |
| <span class="source-line-no">287</span><span id="line-287"> assert location != null;</span> |
| <span class="source-line-no">288</span><span id="line-288"></span> |
| <span class="source-line-no">289</span><span id="line-289"> int replicaId = location.getRegion().getReplicaId();</span> |
| <span class="source-line-no">290</span><span id="line-290"></span> |
| <span class="source-line-no">291</span><span id="line-291"> HRegionLocation oldLoc = getRegionLocation(location.getRegion().getReplicaId());</span> |
| <span class="source-line-no">292</span><span id="line-292"> HRegionLocation selectedLoc = selectRegionLocation(oldLoc, location, checkForEquals, force);</span> |
| <span class="source-line-no">293</span><span id="line-293"></span> |
| <span class="source-line-no">294</span><span id="line-294"> if (selectedLoc == oldLoc) {</span> |
| <span class="source-line-no">295</span><span id="line-295"> return this;</span> |
| <span class="source-line-no">296</span><span id="line-296"> }</span> |
| <span class="source-line-no">297</span><span id="line-297"> HRegionLocation[] newLocations = new HRegionLocation[Math.max(locations.length, replicaId + 1)];</span> |
| <span class="source-line-no">298</span><span id="line-298"> System.arraycopy(locations, 0, newLocations, 0, locations.length);</span> |
| <span class="source-line-no">299</span><span id="line-299"> newLocations[replicaId] = location;</span> |
| <span class="source-line-no">300</span><span id="line-300"> // ensure that all replicas share the same start code. Otherwise delete them</span> |
| <span class="source-line-no">301</span><span id="line-301"> for (int i = 0; i < newLocations.length; i++) {</span> |
| <span class="source-line-no">302</span><span id="line-302"> if (newLocations[i] != null) {</span> |
| <span class="source-line-no">303</span><span id="line-303"> if (</span> |
| <span class="source-line-no">304</span><span id="line-304"> !RegionReplicaUtil.isReplicasForSameRegion(location.getRegion(),</span> |
| <span class="source-line-no">305</span><span id="line-305"> newLocations[i].getRegion())</span> |
| <span class="source-line-no">306</span><span id="line-306"> ) {</span> |
| <span class="source-line-no">307</span><span id="line-307"> newLocations[i] = null;</span> |
| <span class="source-line-no">308</span><span id="line-308"> }</span> |
| <span class="source-line-no">309</span><span id="line-309"> }</span> |
| <span class="source-line-no">310</span><span id="line-310"> }</span> |
| <span class="source-line-no">311</span><span id="line-311"> return new RegionLocations(newLocations);</span> |
| <span class="source-line-no">312</span><span id="line-312"> }</span> |
| <span class="source-line-no">313</span><span id="line-313"></span> |
| <span class="source-line-no">314</span><span id="line-314"> private boolean isGreaterThan(long a, long b, boolean checkForEquals) {</span> |
| <span class="source-line-no">315</span><span id="line-315"> return a > b || (checkForEquals && (a == b));</span> |
| <span class="source-line-no">316</span><span id="line-316"> }</span> |
| <span class="source-line-no">317</span><span id="line-317"></span> |
| <span class="source-line-no">318</span><span id="line-318"> public HRegionLocation getRegionLocation(int replicaId) {</span> |
| <span class="source-line-no">319</span><span id="line-319"> if (replicaId >= locations.length) {</span> |
| <span class="source-line-no">320</span><span id="line-320"> return null;</span> |
| <span class="source-line-no">321</span><span id="line-321"> }</span> |
| <span class="source-line-no">322</span><span id="line-322"> return locations[replicaId];</span> |
| <span class="source-line-no">323</span><span id="line-323"> }</span> |
| <span class="source-line-no">324</span><span id="line-324"></span> |
| <span class="source-line-no">325</span><span id="line-325"> /**</span> |
| <span class="source-line-no">326</span><span id="line-326"> * Returns the region location from the list for matching regionName, which can be regionName or</span> |
| <span class="source-line-no">327</span><span id="line-327"> * encodedRegionName</span> |
| <span class="source-line-no">328</span><span id="line-328"> * @param regionName regionName or encodedRegionName</span> |
| <span class="source-line-no">329</span><span id="line-329"> * @return HRegionLocation found or null</span> |
| <span class="source-line-no">330</span><span id="line-330"> */</span> |
| <span class="source-line-no">331</span><span id="line-331"> public HRegionLocation getRegionLocationByRegionName(byte[] regionName) {</span> |
| <span class="source-line-no">332</span><span id="line-332"> for (HRegionLocation loc : locations) {</span> |
| <span class="source-line-no">333</span><span id="line-333"> if (loc != null) {</span> |
| <span class="source-line-no">334</span><span id="line-334"> if (</span> |
| <span class="source-line-no">335</span><span id="line-335"> Bytes.equals(loc.getRegion().getRegionName(), regionName)</span> |
| <span class="source-line-no">336</span><span id="line-336"> || Bytes.equals(loc.getRegion().getEncodedNameAsBytes(), regionName)</span> |
| <span class="source-line-no">337</span><span id="line-337"> ) {</span> |
| <span class="source-line-no">338</span><span id="line-338"> return loc;</span> |
| <span class="source-line-no">339</span><span id="line-339"> }</span> |
| <span class="source-line-no">340</span><span id="line-340"> }</span> |
| <span class="source-line-no">341</span><span id="line-341"> }</span> |
| <span class="source-line-no">342</span><span id="line-342"> return null;</span> |
| <span class="source-line-no">343</span><span id="line-343"> }</span> |
| <span class="source-line-no">344</span><span id="line-344"></span> |
| <span class="source-line-no">345</span><span id="line-345"> public HRegionLocation[] getRegionLocations() {</span> |
| <span class="source-line-no">346</span><span id="line-346"> return locations;</span> |
| <span class="source-line-no">347</span><span id="line-347"> }</span> |
| <span class="source-line-no">348</span><span id="line-348"></span> |
| <span class="source-line-no">349</span><span id="line-349"> public HRegionLocation getDefaultRegionLocation() {</span> |
| <span class="source-line-no">350</span><span id="line-350"> return locations[RegionInfo.DEFAULT_REPLICA_ID];</span> |
| <span class="source-line-no">351</span><span id="line-351"> }</span> |
| <span class="source-line-no">352</span><span id="line-352"></span> |
| <span class="source-line-no">353</span><span id="line-353"> /**</span> |
| <span class="source-line-no">354</span><span id="line-354"> * Returns the first not-null region location in the list</span> |
| <span class="source-line-no">355</span><span id="line-355"> */</span> |
| <span class="source-line-no">356</span><span id="line-356"> public HRegionLocation getRegionLocation() {</span> |
| <span class="source-line-no">357</span><span id="line-357"> for (HRegionLocation loc : locations) {</span> |
| <span class="source-line-no">358</span><span id="line-358"> if (loc != null) {</span> |
| <span class="source-line-no">359</span><span id="line-359"> return loc;</span> |
| <span class="source-line-no">360</span><span id="line-360"> }</span> |
| <span class="source-line-no">361</span><span id="line-361"> }</span> |
| <span class="source-line-no">362</span><span id="line-362"> return null;</span> |
| <span class="source-line-no">363</span><span id="line-363"> }</span> |
| <span class="source-line-no">364</span><span id="line-364"></span> |
| <span class="source-line-no">365</span><span id="line-365"> @Override</span> |
| <span class="source-line-no">366</span><span id="line-366"> public Iterator<HRegionLocation> iterator() {</span> |
| <span class="source-line-no">367</span><span id="line-367"> return Arrays.asList(locations).iterator();</span> |
| <span class="source-line-no">368</span><span id="line-368"> }</span> |
| <span class="source-line-no">369</span><span id="line-369"></span> |
| <span class="source-line-no">370</span><span id="line-370"> @Override</span> |
| <span class="source-line-no">371</span><span id="line-371"> public String toString() {</span> |
| <span class="source-line-no">372</span><span id="line-372"> StringBuilder builder = new StringBuilder("[");</span> |
| <span class="source-line-no">373</span><span id="line-373"> for (HRegionLocation loc : locations) {</span> |
| <span class="source-line-no">374</span><span id="line-374"> if (builder.length() > 1) {</span> |
| <span class="source-line-no">375</span><span id="line-375"> builder.append(", ");</span> |
| <span class="source-line-no">376</span><span id="line-376"> }</span> |
| <span class="source-line-no">377</span><span id="line-377"> builder.append(loc == null ? "null" : loc);</span> |
| <span class="source-line-no">378</span><span id="line-378"> }</span> |
| <span class="source-line-no">379</span><span id="line-379"> builder.append("]");</span> |
| <span class="source-line-no">380</span><span id="line-380"> return builder.toString();</span> |
| <span class="source-line-no">381</span><span id="line-381"> }</span> |
| <span class="source-line-no">382</span><span id="line-382"></span> |
| <span class="source-line-no">383</span><span id="line-383">}</span> |
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| </pre> |
| </div> |
| </main> |
| </body> |
| </html> |
