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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><a name="line.18"></a> |
| <span class="sourceLineNo">019</span>package org.apache.hadoop.hbase;<a name="line.19"></a> |
| <span class="sourceLineNo">020</span><a name="line.20"></a> |
| <span class="sourceLineNo">021</span>import java.util.Arrays;<a name="line.21"></a> |
| <span class="sourceLineNo">022</span>import java.util.Collection;<a name="line.22"></a> |
| <span class="sourceLineNo">023</span>import java.util.Iterator;<a name="line.23"></a> |
| <span class="sourceLineNo">024</span><a name="line.24"></a> |
| <span class="sourceLineNo">025</span>import org.apache.hadoop.hbase.client.RegionInfo;<a name="line.25"></a> |
| <span class="sourceLineNo">026</span>import org.apache.hadoop.hbase.client.RegionReplicaUtil;<a name="line.26"></a> |
| <span class="sourceLineNo">027</span>import org.apache.hadoop.hbase.util.Bytes;<a name="line.27"></a> |
| <span class="sourceLineNo">028</span>import org.apache.yetus.audience.InterfaceAudience;<a name="line.28"></a> |
| <span class="sourceLineNo">029</span><a name="line.29"></a> |
| <span class="sourceLineNo">030</span>/**<a name="line.30"></a> |
| <span class="sourceLineNo">031</span> * Container for holding a list of {@link HRegionLocation}'s that correspond to the<a name="line.31"></a> |
| <span class="sourceLineNo">032</span> * same range. The list is indexed by the replicaId. This is an immutable list,<a name="line.32"></a> |
| <span class="sourceLineNo">033</span> * however mutation operations are provided which returns a new List via copy-on-write<a name="line.33"></a> |
| <span class="sourceLineNo">034</span> * (assuming small number of locations)<a name="line.34"></a> |
| <span class="sourceLineNo">035</span> */<a name="line.35"></a> |
| <span class="sourceLineNo">036</span>@InterfaceAudience.Private<a name="line.36"></a> |
| <span class="sourceLineNo">037</span>public class RegionLocations implements Iterable<HRegionLocation> {<a name="line.37"></a> |
| <span class="sourceLineNo">038</span><a name="line.38"></a> |
| <span class="sourceLineNo">039</span> private final int numNonNullElements;<a name="line.39"></a> |
| <span class="sourceLineNo">040</span><a name="line.40"></a> |
| <span class="sourceLineNo">041</span> // locations array contains the HRL objects for known region replicas indexes by the replicaId.<a name="line.41"></a> |
| <span class="sourceLineNo">042</span> // elements can be null if the region replica is not known at all. A null value indicates<a name="line.42"></a> |
| <span class="sourceLineNo">043</span> // that there is a region replica with the index as replicaId, but the location is not known<a name="line.43"></a> |
| <span class="sourceLineNo">044</span> // in the cache.<a name="line.44"></a> |
| <span class="sourceLineNo">045</span> private final HRegionLocation[] locations; // replicaId -> HRegionLocation.<a name="line.45"></a> |
| <span class="sourceLineNo">046</span><a name="line.46"></a> |
| <span class="sourceLineNo">047</span> /**<a name="line.47"></a> |
| <span class="sourceLineNo">048</span> * Constructs the region location list. The locations array should<a name="line.48"></a> |
| <span class="sourceLineNo">049</span> * contain all the locations for known replicas for the region, and should be<a name="line.49"></a> |
| <span class="sourceLineNo">050</span> * sorted in replicaId ascending order, although it can contain nulls indicating replicaIds<a name="line.50"></a> |
| <span class="sourceLineNo">051</span> * that the locations of which are not known.<a name="line.51"></a> |
| <span class="sourceLineNo">052</span> * @param locations an array of HRegionLocations for the same region range<a name="line.52"></a> |
| <span class="sourceLineNo">053</span> */<a name="line.53"></a> |
| <span class="sourceLineNo">054</span> public RegionLocations(HRegionLocation... locations) {<a name="line.54"></a> |
| <span class="sourceLineNo">055</span> int numNonNullElements = 0;<a name="line.55"></a> |
| <span class="sourceLineNo">056</span> int maxReplicaId = -1;<a name="line.56"></a> |
| <span class="sourceLineNo">057</span> int maxReplicaIdIndex = -1;<a name="line.57"></a> |
| <span class="sourceLineNo">058</span> int index = 0;<a name="line.58"></a> |
| <span class="sourceLineNo">059</span> for (HRegionLocation loc : locations) {<a name="line.59"></a> |
| <span class="sourceLineNo">060</span> if (loc != null) {<a name="line.60"></a> |
| <span class="sourceLineNo">061</span> if (loc.getRegion().getReplicaId() >= maxReplicaId) {<a name="line.61"></a> |
| <span class="sourceLineNo">062</span> maxReplicaId = loc.getRegion().getReplicaId();<a name="line.62"></a> |
| <span class="sourceLineNo">063</span> maxReplicaIdIndex = index;<a name="line.63"></a> |
| <span class="sourceLineNo">064</span> }<a name="line.64"></a> |
| <span class="sourceLineNo">065</span> }<a name="line.65"></a> |
| <span class="sourceLineNo">066</span> index++;<a name="line.66"></a> |
| <span class="sourceLineNo">067</span> }<a name="line.67"></a> |
| <span class="sourceLineNo">068</span> // account for the null elements in the array after maxReplicaIdIndex<a name="line.68"></a> |
| <span class="sourceLineNo">069</span> maxReplicaId = maxReplicaId + (locations.length - (maxReplicaIdIndex + 1) );<a name="line.69"></a> |
| <span class="sourceLineNo">070</span><a name="line.70"></a> |
| <span class="sourceLineNo">071</span> if (maxReplicaId + 1 == locations.length) {<a name="line.71"></a> |
| <span class="sourceLineNo">072</span> this.locations = locations;<a name="line.72"></a> |
| <span class="sourceLineNo">073</span> } else {<a name="line.73"></a> |
| <span class="sourceLineNo">074</span> this.locations = new HRegionLocation[maxReplicaId + 1];<a name="line.74"></a> |
| <span class="sourceLineNo">075</span> for (HRegionLocation loc : locations) {<a name="line.75"></a> |
| <span class="sourceLineNo">076</span> if (loc != null) {<a name="line.76"></a> |
| <span class="sourceLineNo">077</span> this.locations[loc.getRegion().getReplicaId()] = loc;<a name="line.77"></a> |
| <span class="sourceLineNo">078</span> }<a name="line.78"></a> |
| <span class="sourceLineNo">079</span> }<a name="line.79"></a> |
| <span class="sourceLineNo">080</span> }<a name="line.80"></a> |
| <span class="sourceLineNo">081</span> for (HRegionLocation loc : this.locations) {<a name="line.81"></a> |
| <span class="sourceLineNo">082</span> if (loc != null && loc.getServerName() != null){<a name="line.82"></a> |
| <span class="sourceLineNo">083</span> numNonNullElements++;<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> this.numNonNullElements = numNonNullElements;<a name="line.86"></a> |
| <span class="sourceLineNo">087</span> }<a name="line.87"></a> |
| <span class="sourceLineNo">088</span><a name="line.88"></a> |
| <span class="sourceLineNo">089</span> public RegionLocations(Collection<HRegionLocation> locations) {<a name="line.89"></a> |
| <span class="sourceLineNo">090</span> this(locations.toArray(new HRegionLocation[locations.size()]));<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> * Returns the size of the list even if some of the elements<a name="line.94"></a> |
| <span class="sourceLineNo">095</span> * might be null.<a name="line.95"></a> |
| <span class="sourceLineNo">096</span> * @return the size of the list (corresponding to the max replicaId)<a name="line.96"></a> |
| <span class="sourceLineNo">097</span> */<a name="line.97"></a> |
| <span class="sourceLineNo">098</span> public int size() {<a name="line.98"></a> |
| <span class="sourceLineNo">099</span> return locations.length;<a name="line.99"></a> |
| <span class="sourceLineNo">100</span> }<a name="line.100"></a> |
| <span class="sourceLineNo">101</span><a name="line.101"></a> |
| <span class="sourceLineNo">102</span> /**<a name="line.102"></a> |
| <span class="sourceLineNo">103</span> * Returns the size of not-null locations<a name="line.103"></a> |
| <span class="sourceLineNo">104</span> * @return the size of not-null locations<a name="line.104"></a> |
| <span class="sourceLineNo">105</span> */<a name="line.105"></a> |
| <span class="sourceLineNo">106</span> public int numNonNullElements() {<a name="line.106"></a> |
| <span class="sourceLineNo">107</span> return numNonNullElements;<a name="line.107"></a> |
| <span class="sourceLineNo">108</span> }<a name="line.108"></a> |
| <span class="sourceLineNo">109</span><a name="line.109"></a> |
| <span class="sourceLineNo">110</span> /**<a name="line.110"></a> |
| <span class="sourceLineNo">111</span> * Returns whether there are non-null elements in the list<a name="line.111"></a> |
| <span class="sourceLineNo">112</span> * @return whether there are non-null elements in the list<a name="line.112"></a> |
| <span class="sourceLineNo">113</span> */<a name="line.113"></a> |
| <span class="sourceLineNo">114</span> public boolean isEmpty() {<a name="line.114"></a> |
| <span class="sourceLineNo">115</span> return numNonNullElements == 0;<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> /**<a name="line.118"></a> |
| <span class="sourceLineNo">119</span> * Returns a new RegionLocations with the locations removed (set to null)<a name="line.119"></a> |
| <span class="sourceLineNo">120</span> * which have the destination server as given.<a name="line.120"></a> |
| <span class="sourceLineNo">121</span> * @param serverName the serverName to remove locations of<a name="line.121"></a> |
| <span class="sourceLineNo">122</span> * @return an RegionLocations object with removed locations or the same object<a name="line.122"></a> |
| <span class="sourceLineNo">123</span> * if nothing is removed<a name="line.123"></a> |
| <span class="sourceLineNo">124</span> */<a name="line.124"></a> |
| <span class="sourceLineNo">125</span> public RegionLocations removeByServer(ServerName serverName) {<a name="line.125"></a> |
| <span class="sourceLineNo">126</span> HRegionLocation[] newLocations = null;<a name="line.126"></a> |
| <span class="sourceLineNo">127</span> for (int i = 0; i < locations.length; i++) {<a name="line.127"></a> |
| <span class="sourceLineNo">128</span> // check whether something to remove<a name="line.128"></a> |
| <span class="sourceLineNo">129</span> if (locations[i] != null && serverName.equals(locations[i].getServerName())) {<a name="line.129"></a> |
| <span class="sourceLineNo">130</span> if (newLocations == null) { //first time<a name="line.130"></a> |
| <span class="sourceLineNo">131</span> newLocations = new HRegionLocation[locations.length];<a name="line.131"></a> |
| <span class="sourceLineNo">132</span> System.arraycopy(locations, 0, newLocations, 0, i);<a name="line.132"></a> |
| <span class="sourceLineNo">133</span> }<a name="line.133"></a> |
| <span class="sourceLineNo">134</span> newLocations[i] = null;<a name="line.134"></a> |
| <span class="sourceLineNo">135</span> } else if (newLocations != null) {<a name="line.135"></a> |
| <span class="sourceLineNo">136</span> newLocations[i] = locations[i];<a name="line.136"></a> |
| <span class="sourceLineNo">137</span> }<a name="line.137"></a> |
| <span class="sourceLineNo">138</span> }<a name="line.138"></a> |
| <span class="sourceLineNo">139</span> return newLocations == null ? this : new RegionLocations(newLocations);<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> /**<a name="line.142"></a> |
| <span class="sourceLineNo">143</span> * Removes the given location from the list<a name="line.143"></a> |
| <span class="sourceLineNo">144</span> * @param location the location to remove<a name="line.144"></a> |
| <span class="sourceLineNo">145</span> * @return an RegionLocations object with removed locations or the same object<a name="line.145"></a> |
| <span class="sourceLineNo">146</span> * if nothing is removed<a name="line.146"></a> |
| <span class="sourceLineNo">147</span> */<a name="line.147"></a> |
| <span class="sourceLineNo">148</span> public RegionLocations remove(HRegionLocation location) {<a name="line.148"></a> |
| <span class="sourceLineNo">149</span> if (location == null) return this;<a name="line.149"></a> |
| <span class="sourceLineNo">150</span> if (location.getRegion() == null) return this;<a name="line.150"></a> |
| <span class="sourceLineNo">151</span> int replicaId = location.getRegion().getReplicaId();<a name="line.151"></a> |
| <span class="sourceLineNo">152</span> if (replicaId >= locations.length) return this;<a name="line.152"></a> |
| <span class="sourceLineNo">153</span><a name="line.153"></a> |
| <span class="sourceLineNo">154</span> // check whether something to remove. HRL.compareTo() compares ONLY the<a name="line.154"></a> |
| <span class="sourceLineNo">155</span> // serverName. We want to compare the HRI's as well.<a name="line.155"></a> |
| <span class="sourceLineNo">156</span> if (locations[replicaId] == null<a name="line.156"></a> |
| <span class="sourceLineNo">157</span> || RegionInfo.COMPARATOR.compare(location.getRegion(), locations[replicaId].getRegion()) != 0<a name="line.157"></a> |
| <span class="sourceLineNo">158</span> || !location.equals(locations[replicaId])) {<a name="line.158"></a> |
| <span class="sourceLineNo">159</span> return this;<a name="line.159"></a> |
| <span class="sourceLineNo">160</span> }<a name="line.160"></a> |
| <span class="sourceLineNo">161</span><a name="line.161"></a> |
| <span class="sourceLineNo">162</span> HRegionLocation[] newLocations = new HRegionLocation[locations.length];<a name="line.162"></a> |
| <span class="sourceLineNo">163</span> System.arraycopy(locations, 0, newLocations, 0, locations.length);<a name="line.163"></a> |
| <span class="sourceLineNo">164</span> newLocations[replicaId] = null;<a name="line.164"></a> |
| <span class="sourceLineNo">165</span><a name="line.165"></a> |
| <span class="sourceLineNo">166</span> return new RegionLocations(newLocations);<a name="line.166"></a> |
| <span class="sourceLineNo">167</span> }<a name="line.167"></a> |
| <span class="sourceLineNo">168</span><a name="line.168"></a> |
| <span class="sourceLineNo">169</span> /**<a name="line.169"></a> |
| <span class="sourceLineNo">170</span> * Removes location of the given replicaId from the list<a name="line.170"></a> |
| <span class="sourceLineNo">171</span> * @param replicaId the replicaId of the location to remove<a name="line.171"></a> |
| <span class="sourceLineNo">172</span> * @return an RegionLocations object with removed locations or the same object<a name="line.172"></a> |
| <span class="sourceLineNo">173</span> * if nothing is removed<a name="line.173"></a> |
| <span class="sourceLineNo">174</span> */<a name="line.174"></a> |
| <span class="sourceLineNo">175</span> public RegionLocations remove(int replicaId) {<a name="line.175"></a> |
| <span class="sourceLineNo">176</span> if (getRegionLocation(replicaId) == null) {<a name="line.176"></a> |
| <span class="sourceLineNo">177</span> return this;<a name="line.177"></a> |
| <span class="sourceLineNo">178</span> }<a name="line.178"></a> |
| <span class="sourceLineNo">179</span><a name="line.179"></a> |
| <span class="sourceLineNo">180</span> HRegionLocation[] newLocations = new HRegionLocation[locations.length];<a name="line.180"></a> |
| <span class="sourceLineNo">181</span><a name="line.181"></a> |
| <span class="sourceLineNo">182</span> System.arraycopy(locations, 0, newLocations, 0, locations.length);<a name="line.182"></a> |
| <span class="sourceLineNo">183</span> if (replicaId < newLocations.length) {<a name="line.183"></a> |
| <span class="sourceLineNo">184</span> newLocations[replicaId] = null;<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> return new RegionLocations(newLocations);<a name="line.187"></a> |
| <span class="sourceLineNo">188</span> }<a name="line.188"></a> |
| <span class="sourceLineNo">189</span><a name="line.189"></a> |
| <span class="sourceLineNo">190</span> /**<a name="line.190"></a> |
| <span class="sourceLineNo">191</span> * Set the element to null if its getServerName method returns null. Returns null if all the<a name="line.191"></a> |
| <span class="sourceLineNo">192</span> * elements are removed.<a name="line.192"></a> |
| <span class="sourceLineNo">193</span> */<a name="line.193"></a> |
| <span class="sourceLineNo">194</span> public RegionLocations removeElementsWithNullLocation() {<a name="line.194"></a> |
| <span class="sourceLineNo">195</span> HRegionLocation[] newLocations = new HRegionLocation[locations.length];<a name="line.195"></a> |
| <span class="sourceLineNo">196</span> boolean hasNonNullElement = false;<a name="line.196"></a> |
| <span class="sourceLineNo">197</span> for (int i = 0; i < locations.length; i++) {<a name="line.197"></a> |
| <span class="sourceLineNo">198</span> if (locations[i] != null && locations[i].getServerName() != null) {<a name="line.198"></a> |
| <span class="sourceLineNo">199</span> hasNonNullElement = true;<a name="line.199"></a> |
| <span class="sourceLineNo">200</span> newLocations[i] = locations[i];<a name="line.200"></a> |
| <span class="sourceLineNo">201</span> }<a name="line.201"></a> |
| <span class="sourceLineNo">202</span> }<a name="line.202"></a> |
| <span class="sourceLineNo">203</span> return hasNonNullElement ? new RegionLocations(newLocations) : null;<a name="line.203"></a> |
| <span class="sourceLineNo">204</span> }<a name="line.204"></a> |
| <span class="sourceLineNo">205</span><a name="line.205"></a> |
| <span class="sourceLineNo">206</span> /**<a name="line.206"></a> |
| <span class="sourceLineNo">207</span> * Merges this RegionLocations list with the given list assuming<a name="line.207"></a> |
| <span class="sourceLineNo">208</span> * same range, and keeping the most up to date version of the<a name="line.208"></a> |
| <span class="sourceLineNo">209</span> * HRegionLocation entries from either list according to seqNum. If seqNums<a name="line.209"></a> |
| <span class="sourceLineNo">210</span> * are equal, the location from the argument (other) is taken.<a name="line.210"></a> |
| <span class="sourceLineNo">211</span> * @param other the locations to merge with<a name="line.211"></a> |
| <span class="sourceLineNo">212</span> * @return an RegionLocations object with merged locations or the same object<a name="line.212"></a> |
| <span class="sourceLineNo">213</span> * if nothing is merged<a name="line.213"></a> |
| <span class="sourceLineNo">214</span> */<a name="line.214"></a> |
| <span class="sourceLineNo">215</span> public RegionLocations mergeLocations(RegionLocations other) {<a name="line.215"></a> |
| <span class="sourceLineNo">216</span> assert other != null;<a name="line.216"></a> |
| <span class="sourceLineNo">217</span><a name="line.217"></a> |
| <span class="sourceLineNo">218</span> HRegionLocation[] newLocations = null;<a name="line.218"></a> |
| <span class="sourceLineNo">219</span><a name="line.219"></a> |
| <span class="sourceLineNo">220</span> // Use the length from other, since it is coming from meta. Otherwise,<a name="line.220"></a> |
| <span class="sourceLineNo">221</span> // in case of region replication going down, we might have a leak here.<a name="line.221"></a> |
| <span class="sourceLineNo">222</span> int max = other.locations.length;<a name="line.222"></a> |
| <span class="sourceLineNo">223</span><a name="line.223"></a> |
| <span class="sourceLineNo">224</span> RegionInfo regionInfo = null;<a name="line.224"></a> |
| <span class="sourceLineNo">225</span> for (int i = 0; i < max; i++) {<a name="line.225"></a> |
| <span class="sourceLineNo">226</span> HRegionLocation thisLoc = this.getRegionLocation(i);<a name="line.226"></a> |
| <span class="sourceLineNo">227</span> HRegionLocation otherLoc = other.getRegionLocation(i);<a name="line.227"></a> |
| <span class="sourceLineNo">228</span> if (regionInfo == null && otherLoc != null && otherLoc.getRegion() != null) {<a name="line.228"></a> |
| <span class="sourceLineNo">229</span> // regionInfo is the first non-null HRI from other RegionLocations. We use it to ensure that<a name="line.229"></a> |
| <span class="sourceLineNo">230</span> // all replica region infos belong to the same region with same region id.<a name="line.230"></a> |
| <span class="sourceLineNo">231</span> regionInfo = otherLoc.getRegion();<a name="line.231"></a> |
| <span class="sourceLineNo">232</span> }<a name="line.232"></a> |
| <span class="sourceLineNo">233</span><a name="line.233"></a> |
| <span class="sourceLineNo">234</span> HRegionLocation selectedLoc = selectRegionLocation(thisLoc,<a name="line.234"></a> |
| <span class="sourceLineNo">235</span> otherLoc, true, false);<a name="line.235"></a> |
| <span class="sourceLineNo">236</span><a name="line.236"></a> |
| <span class="sourceLineNo">237</span> if (selectedLoc != thisLoc) {<a name="line.237"></a> |
| <span class="sourceLineNo">238</span> if (newLocations == null) {<a name="line.238"></a> |
| <span class="sourceLineNo">239</span> newLocations = new HRegionLocation[max];<a name="line.239"></a> |
| <span class="sourceLineNo">240</span> System.arraycopy(locations, 0, newLocations, 0, i);<a name="line.240"></a> |
| <span class="sourceLineNo">241</span> }<a name="line.241"></a> |
| <span class="sourceLineNo">242</span> }<a name="line.242"></a> |
| <span class="sourceLineNo">243</span> if (newLocations != null) {<a name="line.243"></a> |
| <span class="sourceLineNo">244</span> newLocations[i] = selectedLoc;<a name="line.244"></a> |
| <span class="sourceLineNo">245</span> }<a name="line.245"></a> |
| <span class="sourceLineNo">246</span> }<a name="line.246"></a> |
| <span class="sourceLineNo">247</span><a name="line.247"></a> |
| <span class="sourceLineNo">248</span> // ensure that all replicas share the same start code. Otherwise delete them<a name="line.248"></a> |
| <span class="sourceLineNo">249</span> if (newLocations != null && regionInfo != null) {<a name="line.249"></a> |
| <span class="sourceLineNo">250</span> for (int i=0; i < newLocations.length; i++) {<a name="line.250"></a> |
| <span class="sourceLineNo">251</span> if (newLocations[i] != null) {<a name="line.251"></a> |
| <span class="sourceLineNo">252</span> if (!RegionReplicaUtil.isReplicasForSameRegion(regionInfo,<a name="line.252"></a> |
| <span class="sourceLineNo">253</span> newLocations[i].getRegion())) {<a name="line.253"></a> |
| <span class="sourceLineNo">254</span> newLocations[i] = null;<a name="line.254"></a> |
| <span class="sourceLineNo">255</span> }<a name="line.255"></a> |
| <span class="sourceLineNo">256</span> }<a name="line.256"></a> |
| <span class="sourceLineNo">257</span> }<a name="line.257"></a> |
| <span class="sourceLineNo">258</span> }<a name="line.258"></a> |
| <span class="sourceLineNo">259</span><a name="line.259"></a> |
| <span class="sourceLineNo">260</span> return newLocations == null ? this : new RegionLocations(newLocations);<a name="line.260"></a> |
| <span class="sourceLineNo">261</span> }<a name="line.261"></a> |
| <span class="sourceLineNo">262</span><a name="line.262"></a> |
| <span class="sourceLineNo">263</span> private HRegionLocation selectRegionLocation(HRegionLocation oldLocation,<a name="line.263"></a> |
| <span class="sourceLineNo">264</span> HRegionLocation location, boolean checkForEquals, boolean force) {<a name="line.264"></a> |
| <span class="sourceLineNo">265</span> if (location == null) {<a name="line.265"></a> |
| <span class="sourceLineNo">266</span> return oldLocation == null ? null : oldLocation;<a name="line.266"></a> |
| <span class="sourceLineNo">267</span> }<a name="line.267"></a> |
| <span class="sourceLineNo">268</span><a name="line.268"></a> |
| <span class="sourceLineNo">269</span> if (oldLocation == null) {<a name="line.269"></a> |
| <span class="sourceLineNo">270</span> return location;<a name="line.270"></a> |
| <span class="sourceLineNo">271</span> }<a name="line.271"></a> |
| <span class="sourceLineNo">272</span><a name="line.272"></a> |
| <span class="sourceLineNo">273</span> if (force<a name="line.273"></a> |
| <span class="sourceLineNo">274</span> || isGreaterThan(location.getSeqNum(), oldLocation.getSeqNum(), checkForEquals)) {<a name="line.274"></a> |
| <span class="sourceLineNo">275</span> return location;<a name="line.275"></a> |
| <span class="sourceLineNo">276</span> }<a name="line.276"></a> |
| <span class="sourceLineNo">277</span> return oldLocation;<a name="line.277"></a> |
| <span class="sourceLineNo">278</span> }<a name="line.278"></a> |
| <span class="sourceLineNo">279</span><a name="line.279"></a> |
| <span class="sourceLineNo">280</span> /**<a name="line.280"></a> |
| <span class="sourceLineNo">281</span> * Updates the location with new only if the new location has a higher<a name="line.281"></a> |
| <span class="sourceLineNo">282</span> * seqNum than the old one or force is true.<a name="line.282"></a> |
| <span class="sourceLineNo">283</span> * @param location the location to add or update<a name="line.283"></a> |
| <span class="sourceLineNo">284</span> * @param checkForEquals whether to update the location if seqNums for the<a name="line.284"></a> |
| <span class="sourceLineNo">285</span> * HRegionLocations for the old and new location are the same<a name="line.285"></a> |
| <span class="sourceLineNo">286</span> * @param force whether to force update<a name="line.286"></a> |
| <span class="sourceLineNo">287</span> * @return an RegionLocations object with updated locations or the same object<a name="line.287"></a> |
| <span class="sourceLineNo">288</span> * if nothing is updated<a name="line.288"></a> |
| <span class="sourceLineNo">289</span> */<a name="line.289"></a> |
| <span class="sourceLineNo">290</span> public RegionLocations updateLocation(HRegionLocation location,<a name="line.290"></a> |
| <span class="sourceLineNo">291</span> boolean checkForEquals, boolean force) {<a name="line.291"></a> |
| <span class="sourceLineNo">292</span> assert location != null;<a name="line.292"></a> |
| <span class="sourceLineNo">293</span><a name="line.293"></a> |
| <span class="sourceLineNo">294</span> int replicaId = location.getRegion().getReplicaId();<a name="line.294"></a> |
| <span class="sourceLineNo">295</span><a name="line.295"></a> |
| <span class="sourceLineNo">296</span> HRegionLocation oldLoc = getRegionLocation(location.getRegion().getReplicaId());<a name="line.296"></a> |
| <span class="sourceLineNo">297</span> HRegionLocation selectedLoc = selectRegionLocation(oldLoc, location,<a name="line.297"></a> |
| <span class="sourceLineNo">298</span> checkForEquals, force);<a name="line.298"></a> |
| <span class="sourceLineNo">299</span><a name="line.299"></a> |
| <span class="sourceLineNo">300</span> if (selectedLoc == oldLoc) {<a name="line.300"></a> |
| <span class="sourceLineNo">301</span> return this;<a name="line.301"></a> |
| <span class="sourceLineNo">302</span> }<a name="line.302"></a> |
| <span class="sourceLineNo">303</span> HRegionLocation[] newLocations = new HRegionLocation[Math.max(locations.length, replicaId +1)];<a name="line.303"></a> |
| <span class="sourceLineNo">304</span> System.arraycopy(locations, 0, newLocations, 0, locations.length);<a name="line.304"></a> |
| <span class="sourceLineNo">305</span> newLocations[replicaId] = location;<a name="line.305"></a> |
| <span class="sourceLineNo">306</span> // ensure that all replicas share the same start code. Otherwise delete them<a name="line.306"></a> |
| <span class="sourceLineNo">307</span> for (int i=0; i < newLocations.length; i++) {<a name="line.307"></a> |
| <span class="sourceLineNo">308</span> if (newLocations[i] != null) {<a name="line.308"></a> |
| <span class="sourceLineNo">309</span> if (!RegionReplicaUtil.isReplicasForSameRegion(location.getRegion(),<a name="line.309"></a> |
| <span class="sourceLineNo">310</span> newLocations[i].getRegion())) {<a name="line.310"></a> |
| <span class="sourceLineNo">311</span> newLocations[i] = null;<a name="line.311"></a> |
| <span class="sourceLineNo">312</span> }<a name="line.312"></a> |
| <span class="sourceLineNo">313</span> }<a name="line.313"></a> |
| <span class="sourceLineNo">314</span> }<a name="line.314"></a> |
| <span class="sourceLineNo">315</span> return new RegionLocations(newLocations);<a name="line.315"></a> |
| <span class="sourceLineNo">316</span> }<a name="line.316"></a> |
| <span class="sourceLineNo">317</span><a name="line.317"></a> |
| <span class="sourceLineNo">318</span> private boolean isGreaterThan(long a, long b, boolean checkForEquals) {<a name="line.318"></a> |
| <span class="sourceLineNo">319</span> return a > b || (checkForEquals && (a == b));<a name="line.319"></a> |
| <span class="sourceLineNo">320</span> }<a name="line.320"></a> |
| <span class="sourceLineNo">321</span><a name="line.321"></a> |
| <span class="sourceLineNo">322</span> public HRegionLocation getRegionLocation(int replicaId) {<a name="line.322"></a> |
| <span class="sourceLineNo">323</span> if (replicaId >= locations.length) {<a name="line.323"></a> |
| <span class="sourceLineNo">324</span> return null;<a name="line.324"></a> |
| <span class="sourceLineNo">325</span> }<a name="line.325"></a> |
| <span class="sourceLineNo">326</span> return locations[replicaId];<a name="line.326"></a> |
| <span class="sourceLineNo">327</span> }<a name="line.327"></a> |
| <span class="sourceLineNo">328</span><a name="line.328"></a> |
| <span class="sourceLineNo">329</span> /**<a name="line.329"></a> |
| <span class="sourceLineNo">330</span> * Returns the region location from the list for matching regionName, which can<a name="line.330"></a> |
| <span class="sourceLineNo">331</span> * be regionName or encodedRegionName<a name="line.331"></a> |
| <span class="sourceLineNo">332</span> * @param regionName regionName or encodedRegionName<a name="line.332"></a> |
| <span class="sourceLineNo">333</span> * @return HRegionLocation found or null<a name="line.333"></a> |
| <span class="sourceLineNo">334</span> */<a name="line.334"></a> |
| <span class="sourceLineNo">335</span> public HRegionLocation getRegionLocationByRegionName(byte[] regionName) {<a name="line.335"></a> |
| <span class="sourceLineNo">336</span> for (HRegionLocation loc : locations) {<a name="line.336"></a> |
| <span class="sourceLineNo">337</span> if (loc != null) {<a name="line.337"></a> |
| <span class="sourceLineNo">338</span> if (Bytes.equals(loc.getRegion().getRegionName(), regionName)<a name="line.338"></a> |
| <span class="sourceLineNo">339</span> || Bytes.equals(loc.getRegion().getEncodedNameAsBytes(), regionName)) {<a name="line.339"></a> |
| <span class="sourceLineNo">340</span> return loc;<a name="line.340"></a> |
| <span class="sourceLineNo">341</span> }<a name="line.341"></a> |
| <span class="sourceLineNo">342</span> }<a name="line.342"></a> |
| <span class="sourceLineNo">343</span> }<a name="line.343"></a> |
| <span class="sourceLineNo">344</span> return null;<a name="line.344"></a> |
| <span class="sourceLineNo">345</span> }<a name="line.345"></a> |
| <span class="sourceLineNo">346</span><a name="line.346"></a> |
| <span class="sourceLineNo">347</span> public HRegionLocation[] getRegionLocations() {<a name="line.347"></a> |
| <span class="sourceLineNo">348</span> return locations;<a name="line.348"></a> |
| <span class="sourceLineNo">349</span> }<a name="line.349"></a> |
| <span class="sourceLineNo">350</span><a name="line.350"></a> |
| <span class="sourceLineNo">351</span> public HRegionLocation getDefaultRegionLocation() {<a name="line.351"></a> |
| <span class="sourceLineNo">352</span> return locations[RegionInfo.DEFAULT_REPLICA_ID];<a name="line.352"></a> |
| <span class="sourceLineNo">353</span> }<a name="line.353"></a> |
| <span class="sourceLineNo">354</span><a name="line.354"></a> |
| <span class="sourceLineNo">355</span> /**<a name="line.355"></a> |
| <span class="sourceLineNo">356</span> * Returns the first not-null region location in the list<a name="line.356"></a> |
| <span class="sourceLineNo">357</span> */<a name="line.357"></a> |
| <span class="sourceLineNo">358</span> public HRegionLocation getRegionLocation() {<a name="line.358"></a> |
| <span class="sourceLineNo">359</span> for (HRegionLocation loc : locations) {<a name="line.359"></a> |
| <span class="sourceLineNo">360</span> if (loc != null) {<a name="line.360"></a> |
| <span class="sourceLineNo">361</span> return loc;<a name="line.361"></a> |
| <span class="sourceLineNo">362</span> }<a name="line.362"></a> |
| <span class="sourceLineNo">363</span> }<a name="line.363"></a> |
| <span class="sourceLineNo">364</span> return null;<a name="line.364"></a> |
| <span class="sourceLineNo">365</span> }<a name="line.365"></a> |
| <span class="sourceLineNo">366</span><a name="line.366"></a> |
| <span class="sourceLineNo">367</span> @Override<a name="line.367"></a> |
| <span class="sourceLineNo">368</span> public Iterator<HRegionLocation> iterator() {<a name="line.368"></a> |
| <span class="sourceLineNo">369</span> return Arrays.asList(locations).iterator();<a name="line.369"></a> |
| <span class="sourceLineNo">370</span> }<a name="line.370"></a> |
| <span class="sourceLineNo">371</span><a name="line.371"></a> |
| <span class="sourceLineNo">372</span> @Override<a name="line.372"></a> |
| <span class="sourceLineNo">373</span> public String toString() {<a name="line.373"></a> |
| <span class="sourceLineNo">374</span> StringBuilder builder = new StringBuilder("[");<a name="line.374"></a> |
| <span class="sourceLineNo">375</span> for (HRegionLocation loc : locations) {<a name="line.375"></a> |
| <span class="sourceLineNo">376</span> if (builder.length() > 1) {<a name="line.376"></a> |
| <span class="sourceLineNo">377</span> builder.append(", ");<a name="line.377"></a> |
| <span class="sourceLineNo">378</span> }<a name="line.378"></a> |
| <span class="sourceLineNo">379</span> builder.append(loc == null ? "null" : loc);<a name="line.379"></a> |
| <span class="sourceLineNo">380</span> }<a name="line.380"></a> |
| <span class="sourceLineNo">381</span> builder.append("]");<a name="line.381"></a> |
| <span class="sourceLineNo">382</span> return builder.toString();<a name="line.382"></a> |
| <span class="sourceLineNo">383</span> }<a name="line.383"></a> |
| <span class="sourceLineNo">384</span><a name="line.384"></a> |
| <span class="sourceLineNo">385</span>}<a name="line.385"></a> |
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| </pre> |
| </div> |
| </body> |
| </html> |