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<pre><span class="sourceLineNo">001</span>/**<a name="line.1"></a>
<span class="sourceLineNo">002</span> *<a name="line.2"></a>
<span class="sourceLineNo">003</span> * Licensed to the Apache Software Foundation (ASF) under one<a name="line.3"></a>
<span class="sourceLineNo">004</span> * or more contributor license agreements. See the NOTICE file<a name="line.4"></a>
<span class="sourceLineNo">005</span> * distributed with this work for additional information<a name="line.5"></a>
<span class="sourceLineNo">006</span> * regarding copyright ownership. The ASF licenses this file<a name="line.6"></a>
<span class="sourceLineNo">007</span> * to you under the Apache License, Version 2.0 (the<a name="line.7"></a>
<span class="sourceLineNo">008</span> * "License"); you may not use this file except in compliance<a name="line.8"></a>
<span class="sourceLineNo">009</span> * with the License. You may obtain a copy of the License at<a name="line.9"></a>
<span class="sourceLineNo">010</span> *<a name="line.10"></a>
<span class="sourceLineNo">011</span> * http://www.apache.org/licenses/LICENSE-2.0<a name="line.11"></a>
<span class="sourceLineNo">012</span> *<a name="line.12"></a>
<span class="sourceLineNo">013</span> * Unless required by applicable law or agreed to in writing, software<a name="line.13"></a>
<span class="sourceLineNo">014</span> * distributed under the License is distributed on an "AS IS" BASIS,<a name="line.14"></a>
<span class="sourceLineNo">015</span> * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.<a name="line.15"></a>
<span class="sourceLineNo">016</span> * See the License for the specific language governing permissions and<a name="line.16"></a>
<span class="sourceLineNo">017</span> * limitations under the License.<a name="line.17"></a>
<span class="sourceLineNo">018</span> */<a name="line.18"></a>
<span class="sourceLineNo">019</span><a name="line.19"></a>
<span class="sourceLineNo">020</span>package org.apache.hadoop.hbase.util;<a name="line.20"></a>
<span class="sourceLineNo">021</span><a name="line.21"></a>
<span class="sourceLineNo">022</span>import java.io.IOException;<a name="line.22"></a>
<span class="sourceLineNo">023</span>import java.io.InterruptedIOException;<a name="line.23"></a>
<span class="sourceLineNo">024</span>import java.util.ArrayList;<a name="line.24"></a>
<span class="sourceLineNo">025</span>import java.util.Collection;<a name="line.25"></a>
<span class="sourceLineNo">026</span>import java.util.List;<a name="line.26"></a>
<span class="sourceLineNo">027</span>import java.util.concurrent.Callable;<a name="line.27"></a>
<span class="sourceLineNo">028</span>import java.util.concurrent.CompletionService;<a name="line.28"></a>
<span class="sourceLineNo">029</span>import java.util.concurrent.ExecutionException;<a name="line.29"></a>
<span class="sourceLineNo">030</span>import java.util.concurrent.ExecutorCompletionService;<a name="line.30"></a>
<span class="sourceLineNo">031</span>import java.util.concurrent.ThreadFactory;<a name="line.31"></a>
<span class="sourceLineNo">032</span>import java.util.concurrent.ThreadPoolExecutor;<a name="line.32"></a>
<span class="sourceLineNo">033</span>import java.util.concurrent.TimeUnit;<a name="line.33"></a>
<span class="sourceLineNo">034</span><a name="line.34"></a>
<span class="sourceLineNo">035</span>import org.apache.hadoop.conf.Configuration;<a name="line.35"></a>
<span class="sourceLineNo">036</span>import org.apache.hadoop.fs.Path;<a name="line.36"></a>
<span class="sourceLineNo">037</span>import org.apache.hadoop.hbase.HConstants;<a name="line.37"></a>
<span class="sourceLineNo">038</span>import org.apache.hadoop.hbase.client.RegionInfo;<a name="line.38"></a>
<span class="sourceLineNo">039</span>import org.apache.hadoop.hbase.client.RegionInfoBuilder;<a name="line.39"></a>
<span class="sourceLineNo">040</span>import org.apache.hadoop.hbase.client.TableDescriptor;<a name="line.40"></a>
<span class="sourceLineNo">041</span>import org.apache.hadoop.hbase.regionserver.HRegion;<a name="line.41"></a>
<span class="sourceLineNo">042</span>import org.apache.yetus.audience.InterfaceAudience;<a name="line.42"></a>
<span class="sourceLineNo">043</span>import org.slf4j.Logger;<a name="line.43"></a>
<span class="sourceLineNo">044</span>import org.slf4j.LoggerFactory;<a name="line.44"></a>
<span class="sourceLineNo">045</span><a name="line.45"></a>
<span class="sourceLineNo">046</span>/**<a name="line.46"></a>
<span class="sourceLineNo">047</span> * Utility methods for interacting with the regions.<a name="line.47"></a>
<span class="sourceLineNo">048</span> */<a name="line.48"></a>
<span class="sourceLineNo">049</span>@InterfaceAudience.Private<a name="line.49"></a>
<span class="sourceLineNo">050</span>public abstract class ModifyRegionUtils {<a name="line.50"></a>
<span class="sourceLineNo">051</span> private static final Logger LOG = LoggerFactory.getLogger(ModifyRegionUtils.class);<a name="line.51"></a>
<span class="sourceLineNo">052</span><a name="line.52"></a>
<span class="sourceLineNo">053</span> private ModifyRegionUtils() {<a name="line.53"></a>
<span class="sourceLineNo">054</span> }<a name="line.54"></a>
<span class="sourceLineNo">055</span><a name="line.55"></a>
<span class="sourceLineNo">056</span> public interface RegionFillTask {<a name="line.56"></a>
<span class="sourceLineNo">057</span> void fillRegion(final HRegion region) throws IOException;<a name="line.57"></a>
<span class="sourceLineNo">058</span> }<a name="line.58"></a>
<span class="sourceLineNo">059</span><a name="line.59"></a>
<span class="sourceLineNo">060</span> public interface RegionEditTask {<a name="line.60"></a>
<span class="sourceLineNo">061</span> void editRegion(final RegionInfo region) throws IOException;<a name="line.61"></a>
<span class="sourceLineNo">062</span> }<a name="line.62"></a>
<span class="sourceLineNo">063</span><a name="line.63"></a>
<span class="sourceLineNo">064</span> public static RegionInfo[] createRegionInfos(TableDescriptor tableDescriptor,<a name="line.64"></a>
<span class="sourceLineNo">065</span> byte[][] splitKeys) {<a name="line.65"></a>
<span class="sourceLineNo">066</span> long regionId = System.currentTimeMillis();<a name="line.66"></a>
<span class="sourceLineNo">067</span> RegionInfo[] hRegionInfos = null;<a name="line.67"></a>
<span class="sourceLineNo">068</span> if (splitKeys == null || splitKeys.length == 0) {<a name="line.68"></a>
<span class="sourceLineNo">069</span> hRegionInfos = new RegionInfo[]{<a name="line.69"></a>
<span class="sourceLineNo">070</span> RegionInfoBuilder.newBuilder(tableDescriptor.getTableName())<a name="line.70"></a>
<span class="sourceLineNo">071</span> .setStartKey(null)<a name="line.71"></a>
<span class="sourceLineNo">072</span> .setEndKey(null)<a name="line.72"></a>
<span class="sourceLineNo">073</span> .setSplit(false)<a name="line.73"></a>
<span class="sourceLineNo">074</span> .setRegionId(regionId)<a name="line.74"></a>
<span class="sourceLineNo">075</span> .build()<a name="line.75"></a>
<span class="sourceLineNo">076</span> };<a name="line.76"></a>
<span class="sourceLineNo">077</span> } else {<a name="line.77"></a>
<span class="sourceLineNo">078</span> int numRegions = splitKeys.length + 1;<a name="line.78"></a>
<span class="sourceLineNo">079</span> hRegionInfos = new RegionInfo[numRegions];<a name="line.79"></a>
<span class="sourceLineNo">080</span> byte[] startKey = null;<a name="line.80"></a>
<span class="sourceLineNo">081</span> byte[] endKey = null;<a name="line.81"></a>
<span class="sourceLineNo">082</span> for (int i = 0; i &lt; numRegions; i++) {<a name="line.82"></a>
<span class="sourceLineNo">083</span> endKey = (i == splitKeys.length) ? null : splitKeys[i];<a name="line.83"></a>
<span class="sourceLineNo">084</span> hRegionInfos[i] =<a name="line.84"></a>
<span class="sourceLineNo">085</span> RegionInfoBuilder.newBuilder(tableDescriptor.getTableName())<a name="line.85"></a>
<span class="sourceLineNo">086</span> .setStartKey(startKey)<a name="line.86"></a>
<span class="sourceLineNo">087</span> .setEndKey(endKey)<a name="line.87"></a>
<span class="sourceLineNo">088</span> .setSplit(false)<a name="line.88"></a>
<span class="sourceLineNo">089</span> .setRegionId(regionId)<a name="line.89"></a>
<span class="sourceLineNo">090</span> .build();<a name="line.90"></a>
<span class="sourceLineNo">091</span> startKey = endKey;<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> return hRegionInfos;<a name="line.94"></a>
<span class="sourceLineNo">095</span> }<a name="line.95"></a>
<span class="sourceLineNo">096</span><a name="line.96"></a>
<span class="sourceLineNo">097</span> /**<a name="line.97"></a>
<span class="sourceLineNo">098</span> * Create new set of regions on the specified file-system.<a name="line.98"></a>
<span class="sourceLineNo">099</span> * NOTE: that you should add the regions to hbase:meta after this operation.<a name="line.99"></a>
<span class="sourceLineNo">100</span> *<a name="line.100"></a>
<span class="sourceLineNo">101</span> * @param conf {@link Configuration}<a name="line.101"></a>
<span class="sourceLineNo">102</span> * @param rootDir Root directory for HBase instance<a name="line.102"></a>
<span class="sourceLineNo">103</span> * @param tableDescriptor description of the table<a name="line.103"></a>
<span class="sourceLineNo">104</span> * @param newRegions {@link RegionInfo} that describes the regions to create<a name="line.104"></a>
<span class="sourceLineNo">105</span> * @param task {@link RegionFillTask} custom code to populate region after creation<a name="line.105"></a>
<span class="sourceLineNo">106</span> * @throws IOException<a name="line.106"></a>
<span class="sourceLineNo">107</span> */<a name="line.107"></a>
<span class="sourceLineNo">108</span> public static List&lt;RegionInfo&gt; createRegions(final Configuration conf, final Path rootDir,<a name="line.108"></a>
<span class="sourceLineNo">109</span> final TableDescriptor tableDescriptor, final RegionInfo[] newRegions,<a name="line.109"></a>
<span class="sourceLineNo">110</span> final RegionFillTask task) throws IOException {<a name="line.110"></a>
<span class="sourceLineNo">111</span> if (newRegions == null) return null;<a name="line.111"></a>
<span class="sourceLineNo">112</span> int regionNumber = newRegions.length;<a name="line.112"></a>
<span class="sourceLineNo">113</span> ThreadPoolExecutor exec = getRegionOpenAndInitThreadPool(conf,<a name="line.113"></a>
<span class="sourceLineNo">114</span> "RegionOpenAndInitThread-" + tableDescriptor.getTableName(), regionNumber);<a name="line.114"></a>
<span class="sourceLineNo">115</span> try {<a name="line.115"></a>
<span class="sourceLineNo">116</span> return createRegions(exec, conf, rootDir, tableDescriptor, newRegions, task);<a name="line.116"></a>
<span class="sourceLineNo">117</span> } finally {<a name="line.117"></a>
<span class="sourceLineNo">118</span> exec.shutdownNow();<a name="line.118"></a>
<span class="sourceLineNo">119</span> }<a name="line.119"></a>
<span class="sourceLineNo">120</span> }<a name="line.120"></a>
<span class="sourceLineNo">121</span><a name="line.121"></a>
<span class="sourceLineNo">122</span> /**<a name="line.122"></a>
<span class="sourceLineNo">123</span> * Create new set of regions on the specified file-system.<a name="line.123"></a>
<span class="sourceLineNo">124</span> * NOTE: that you should add the regions to hbase:meta after this operation.<a name="line.124"></a>
<span class="sourceLineNo">125</span> *<a name="line.125"></a>
<span class="sourceLineNo">126</span> * @param exec Thread Pool Executor<a name="line.126"></a>
<span class="sourceLineNo">127</span> * @param conf {@link Configuration}<a name="line.127"></a>
<span class="sourceLineNo">128</span> * @param rootDir Root directory for HBase instance<a name="line.128"></a>
<span class="sourceLineNo">129</span> * @param tableDescriptor description of the table<a name="line.129"></a>
<span class="sourceLineNo">130</span> * @param newRegions {@link RegionInfo} that describes the regions to create<a name="line.130"></a>
<span class="sourceLineNo">131</span> * @param task {@link RegionFillTask} custom code to populate region after creation<a name="line.131"></a>
<span class="sourceLineNo">132</span> * @throws IOException<a name="line.132"></a>
<span class="sourceLineNo">133</span> */<a name="line.133"></a>
<span class="sourceLineNo">134</span> public static List&lt;RegionInfo&gt; createRegions(final ThreadPoolExecutor exec,<a name="line.134"></a>
<span class="sourceLineNo">135</span> final Configuration conf, final Path rootDir,<a name="line.135"></a>
<span class="sourceLineNo">136</span> final TableDescriptor tableDescriptor, final RegionInfo[] newRegions,<a name="line.136"></a>
<span class="sourceLineNo">137</span> final RegionFillTask task) throws IOException {<a name="line.137"></a>
<span class="sourceLineNo">138</span> if (newRegions == null) return null;<a name="line.138"></a>
<span class="sourceLineNo">139</span> int regionNumber = newRegions.length;<a name="line.139"></a>
<span class="sourceLineNo">140</span> CompletionService&lt;RegionInfo&gt; completionService = new ExecutorCompletionService&lt;&gt;(exec);<a name="line.140"></a>
<span class="sourceLineNo">141</span> List&lt;RegionInfo&gt; regionInfos = new ArrayList&lt;&gt;();<a name="line.141"></a>
<span class="sourceLineNo">142</span> for (final RegionInfo newRegion : newRegions) {<a name="line.142"></a>
<span class="sourceLineNo">143</span> completionService.submit(new Callable&lt;RegionInfo&gt;() {<a name="line.143"></a>
<span class="sourceLineNo">144</span> @Override<a name="line.144"></a>
<span class="sourceLineNo">145</span> public RegionInfo call() throws IOException {<a name="line.145"></a>
<span class="sourceLineNo">146</span> return createRegion(conf, rootDir, tableDescriptor, newRegion, task);<a name="line.146"></a>
<span class="sourceLineNo">147</span> }<a name="line.147"></a>
<span class="sourceLineNo">148</span> });<a name="line.148"></a>
<span class="sourceLineNo">149</span> }<a name="line.149"></a>
<span class="sourceLineNo">150</span> try {<a name="line.150"></a>
<span class="sourceLineNo">151</span> // wait for all regions to finish creation<a name="line.151"></a>
<span class="sourceLineNo">152</span> for (int i = 0; i &lt; regionNumber; i++) {<a name="line.152"></a>
<span class="sourceLineNo">153</span> regionInfos.add(completionService.take().get());<a name="line.153"></a>
<span class="sourceLineNo">154</span> }<a name="line.154"></a>
<span class="sourceLineNo">155</span> } catch (InterruptedException e) {<a name="line.155"></a>
<span class="sourceLineNo">156</span> LOG.error("Caught " + e + " during region creation");<a name="line.156"></a>
<span class="sourceLineNo">157</span> throw new InterruptedIOException(e.getMessage());<a name="line.157"></a>
<span class="sourceLineNo">158</span> } catch (ExecutionException e) {<a name="line.158"></a>
<span class="sourceLineNo">159</span> throw new IOException(e);<a name="line.159"></a>
<span class="sourceLineNo">160</span> }<a name="line.160"></a>
<span class="sourceLineNo">161</span> return regionInfos;<a name="line.161"></a>
<span class="sourceLineNo">162</span> }<a name="line.162"></a>
<span class="sourceLineNo">163</span><a name="line.163"></a>
<span class="sourceLineNo">164</span> /**<a name="line.164"></a>
<span class="sourceLineNo">165</span> * Create new set of regions on the specified file-system.<a name="line.165"></a>
<span class="sourceLineNo">166</span> * @param conf {@link Configuration}<a name="line.166"></a>
<span class="sourceLineNo">167</span> * @param rootDir Root directory for HBase instance<a name="line.167"></a>
<span class="sourceLineNo">168</span> * @param tableDescriptor description of the table<a name="line.168"></a>
<span class="sourceLineNo">169</span> * @param newRegion {@link RegionInfo} that describes the region to create<a name="line.169"></a>
<span class="sourceLineNo">170</span> * @param task {@link RegionFillTask} custom code to populate region after creation<a name="line.170"></a>
<span class="sourceLineNo">171</span> * @throws IOException<a name="line.171"></a>
<span class="sourceLineNo">172</span> */<a name="line.172"></a>
<span class="sourceLineNo">173</span> public static RegionInfo createRegion(final Configuration conf, final Path rootDir,<a name="line.173"></a>
<span class="sourceLineNo">174</span> final TableDescriptor tableDescriptor, final RegionInfo newRegion,<a name="line.174"></a>
<span class="sourceLineNo">175</span> final RegionFillTask task) throws IOException {<a name="line.175"></a>
<span class="sourceLineNo">176</span> // 1. Create HRegion<a name="line.176"></a>
<span class="sourceLineNo">177</span> // The WAL subsystem will use the default rootDir rather than the passed in rootDir<a name="line.177"></a>
<span class="sourceLineNo">178</span> // unless I pass along via the conf.<a name="line.178"></a>
<span class="sourceLineNo">179</span> Configuration confForWAL = new Configuration(conf);<a name="line.179"></a>
<span class="sourceLineNo">180</span> confForWAL.set(HConstants.HBASE_DIR, rootDir.toString());<a name="line.180"></a>
<span class="sourceLineNo">181</span> HRegion region = HRegion.createHRegion(newRegion, rootDir, conf, tableDescriptor, null, false);<a name="line.181"></a>
<span class="sourceLineNo">182</span> try {<a name="line.182"></a>
<span class="sourceLineNo">183</span> // 2. Custom user code to interact with the created region<a name="line.183"></a>
<span class="sourceLineNo">184</span> if (task != null) {<a name="line.184"></a>
<span class="sourceLineNo">185</span> task.fillRegion(region);<a name="line.185"></a>
<span class="sourceLineNo">186</span> }<a name="line.186"></a>
<span class="sourceLineNo">187</span> } finally {<a name="line.187"></a>
<span class="sourceLineNo">188</span> // 3. Close the new region to flush to disk. Close log file too.<a name="line.188"></a>
<span class="sourceLineNo">189</span> region.close();<a name="line.189"></a>
<span class="sourceLineNo">190</span> }<a name="line.190"></a>
<span class="sourceLineNo">191</span> return region.getRegionInfo();<a name="line.191"></a>
<span class="sourceLineNo">192</span> }<a name="line.192"></a>
<span class="sourceLineNo">193</span><a name="line.193"></a>
<span class="sourceLineNo">194</span> /**<a name="line.194"></a>
<span class="sourceLineNo">195</span> * Execute the task on the specified set of regions.<a name="line.195"></a>
<span class="sourceLineNo">196</span> *<a name="line.196"></a>
<span class="sourceLineNo">197</span> * @param exec Thread Pool Executor<a name="line.197"></a>
<span class="sourceLineNo">198</span> * @param regions {@link RegionInfo} that describes the regions to edit<a name="line.198"></a>
<span class="sourceLineNo">199</span> * @param task {@link RegionFillTask} custom code to edit the region<a name="line.199"></a>
<span class="sourceLineNo">200</span> * @throws IOException<a name="line.200"></a>
<span class="sourceLineNo">201</span> */<a name="line.201"></a>
<span class="sourceLineNo">202</span> public static void editRegions(final ThreadPoolExecutor exec,<a name="line.202"></a>
<span class="sourceLineNo">203</span> final Collection&lt;RegionInfo&gt; regions, final RegionEditTask task) throws IOException {<a name="line.203"></a>
<span class="sourceLineNo">204</span> final ExecutorCompletionService&lt;Void&gt; completionService = new ExecutorCompletionService&lt;&gt;(exec);<a name="line.204"></a>
<span class="sourceLineNo">205</span> for (final RegionInfo hri: regions) {<a name="line.205"></a>
<span class="sourceLineNo">206</span> completionService.submit(new Callable&lt;Void&gt;() {<a name="line.206"></a>
<span class="sourceLineNo">207</span> @Override<a name="line.207"></a>
<span class="sourceLineNo">208</span> public Void call() throws IOException {<a name="line.208"></a>
<span class="sourceLineNo">209</span> task.editRegion(hri);<a name="line.209"></a>
<span class="sourceLineNo">210</span> return null;<a name="line.210"></a>
<span class="sourceLineNo">211</span> }<a name="line.211"></a>
<span class="sourceLineNo">212</span> });<a name="line.212"></a>
<span class="sourceLineNo">213</span> }<a name="line.213"></a>
<span class="sourceLineNo">214</span><a name="line.214"></a>
<span class="sourceLineNo">215</span> try {<a name="line.215"></a>
<span class="sourceLineNo">216</span> for (RegionInfo hri: regions) {<a name="line.216"></a>
<span class="sourceLineNo">217</span> completionService.take().get();<a name="line.217"></a>
<span class="sourceLineNo">218</span> }<a name="line.218"></a>
<span class="sourceLineNo">219</span> } catch (InterruptedException e) {<a name="line.219"></a>
<span class="sourceLineNo">220</span> throw new InterruptedIOException(e.getMessage());<a name="line.220"></a>
<span class="sourceLineNo">221</span> } catch (ExecutionException e) {<a name="line.221"></a>
<span class="sourceLineNo">222</span> IOException ex = new IOException();<a name="line.222"></a>
<span class="sourceLineNo">223</span> ex.initCause(e.getCause());<a name="line.223"></a>
<span class="sourceLineNo">224</span> throw ex;<a name="line.224"></a>
<span class="sourceLineNo">225</span> }<a name="line.225"></a>
<span class="sourceLineNo">226</span> }<a name="line.226"></a>
<span class="sourceLineNo">227</span><a name="line.227"></a>
<span class="sourceLineNo">228</span> /*<a name="line.228"></a>
<span class="sourceLineNo">229</span> * used by createRegions() to get the thread pool executor based on the<a name="line.229"></a>
<span class="sourceLineNo">230</span> * "hbase.hregion.open.and.init.threads.max" property.<a name="line.230"></a>
<span class="sourceLineNo">231</span> */<a name="line.231"></a>
<span class="sourceLineNo">232</span> static ThreadPoolExecutor getRegionOpenAndInitThreadPool(final Configuration conf,<a name="line.232"></a>
<span class="sourceLineNo">233</span> final String threadNamePrefix, int regionNumber) {<a name="line.233"></a>
<span class="sourceLineNo">234</span> int maxThreads = Math.min(regionNumber, conf.getInt(<a name="line.234"></a>
<span class="sourceLineNo">235</span> "hbase.hregion.open.and.init.threads.max", 16));<a name="line.235"></a>
<span class="sourceLineNo">236</span> ThreadPoolExecutor regionOpenAndInitThreadPool = Threads<a name="line.236"></a>
<span class="sourceLineNo">237</span> .getBoundedCachedThreadPool(maxThreads, 30L, TimeUnit.SECONDS,<a name="line.237"></a>
<span class="sourceLineNo">238</span> new ThreadFactory() {<a name="line.238"></a>
<span class="sourceLineNo">239</span> private int count = 1;<a name="line.239"></a>
<span class="sourceLineNo">240</span><a name="line.240"></a>
<span class="sourceLineNo">241</span> @Override<a name="line.241"></a>
<span class="sourceLineNo">242</span> public Thread newThread(Runnable r) {<a name="line.242"></a>
<span class="sourceLineNo">243</span> return new Thread(r, threadNamePrefix + "-" + count++);<a name="line.243"></a>
<span class="sourceLineNo">244</span> }<a name="line.244"></a>
<span class="sourceLineNo">245</span> });<a name="line.245"></a>
<span class="sourceLineNo">246</span> return regionOpenAndInitThreadPool;<a name="line.246"></a>
<span class="sourceLineNo">247</span> }<a name="line.247"></a>
<span class="sourceLineNo">248</span>}<a name="line.248"></a>
</pre>
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