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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.mapreduce;</span> |
| <span class="source-line-no">019</span><span id="line-19"></span> |
| <span class="source-line-no">020</span><span id="line-20">import java.io.IOException;</span> |
| <span class="source-line-no">021</span><span id="line-21">import java.text.MessageFormat;</span> |
| <span class="source-line-no">022</span><span id="line-22">import java.util.ArrayList;</span> |
| <span class="source-line-no">023</span><span id="line-23">import java.util.HashMap;</span> |
| <span class="source-line-no">024</span><span id="line-24">import java.util.Iterator;</span> |
| <span class="source-line-no">025</span><span id="line-25">import java.util.List;</span> |
| <span class="source-line-no">026</span><span id="line-26">import java.util.Map;</span> |
| <span class="source-line-no">027</span><span id="line-27">import org.apache.hadoop.hbase.HRegionLocation;</span> |
| <span class="source-line-no">028</span><span id="line-28">import org.apache.hadoop.hbase.TableName;</span> |
| <span class="source-line-no">029</span><span id="line-29">import org.apache.hadoop.hbase.client.Connection;</span> |
| <span class="source-line-no">030</span><span id="line-30">import org.apache.hadoop.hbase.client.ConnectionFactory;</span> |
| <span class="source-line-no">031</span><span id="line-31">import org.apache.hadoop.hbase.client.RegionInfo;</span> |
| <span class="source-line-no">032</span><span id="line-32">import org.apache.hadoop.hbase.client.RegionLocator;</span> |
| <span class="source-line-no">033</span><span id="line-33">import org.apache.hadoop.hbase.client.Result;</span> |
| <span class="source-line-no">034</span><span id="line-34">import org.apache.hadoop.hbase.client.Scan;</span> |
| <span class="source-line-no">035</span><span id="line-35">import org.apache.hadoop.hbase.client.Table;</span> |
| <span class="source-line-no">036</span><span id="line-36">import org.apache.hadoop.hbase.io.ImmutableBytesWritable;</span> |
| <span class="source-line-no">037</span><span id="line-37">import org.apache.hadoop.hbase.util.Bytes;</span> |
| <span class="source-line-no">038</span><span id="line-38">import org.apache.hadoop.hbase.util.Pair;</span> |
| <span class="source-line-no">039</span><span id="line-39">import org.apache.hadoop.mapreduce.InputFormat;</span> |
| <span class="source-line-no">040</span><span id="line-40">import org.apache.hadoop.mapreduce.InputSplit;</span> |
| <span class="source-line-no">041</span><span id="line-41">import org.apache.hadoop.mapreduce.JobContext;</span> |
| <span class="source-line-no">042</span><span id="line-42">import org.apache.hadoop.mapreduce.RecordReader;</span> |
| <span class="source-line-no">043</span><span id="line-43">import org.apache.hadoop.mapreduce.TaskAttemptContext;</span> |
| <span class="source-line-no">044</span><span id="line-44">import org.apache.yetus.audience.InterfaceAudience;</span> |
| <span class="source-line-no">045</span><span id="line-45">import org.slf4j.Logger;</span> |
| <span class="source-line-no">046</span><span id="line-46">import org.slf4j.LoggerFactory;</span> |
| <span class="source-line-no">047</span><span id="line-47"></span> |
| <span class="source-line-no">048</span><span id="line-48">/**</span> |
| <span class="source-line-no">049</span><span id="line-49"> * A base for {@link MultiTableInputFormat}s. Receives a list of {@link Scan} instances that define</span> |
| <span class="source-line-no">050</span><span id="line-50"> * the input tables and filters etc. Subclasses may use other TableRecordReader implementations.</span> |
| <span class="source-line-no">051</span><span id="line-51"> */</span> |
| <span class="source-line-no">052</span><span id="line-52">@InterfaceAudience.Public</span> |
| <span class="source-line-no">053</span><span id="line-53">public abstract class MultiTableInputFormatBase</span> |
| <span class="source-line-no">054</span><span id="line-54"> extends InputFormat<ImmutableBytesWritable, Result> {</span> |
| <span class="source-line-no">055</span><span id="line-55"></span> |
| <span class="source-line-no">056</span><span id="line-56"> private static final Logger LOG = LoggerFactory.getLogger(MultiTableInputFormatBase.class);</span> |
| <span class="source-line-no">057</span><span id="line-57"></span> |
| <span class="source-line-no">058</span><span id="line-58"> /** Holds the set of scans used to define the input. */</span> |
| <span class="source-line-no">059</span><span id="line-59"> private List<Scan> scans;</span> |
| <span class="source-line-no">060</span><span id="line-60"></span> |
| <span class="source-line-no">061</span><span id="line-61"> /** The reader scanning the table, can be a custom one. */</span> |
| <span class="source-line-no">062</span><span id="line-62"> private TableRecordReader tableRecordReader = null;</span> |
| <span class="source-line-no">063</span><span id="line-63"></span> |
| <span class="source-line-no">064</span><span id="line-64"> /**</span> |
| <span class="source-line-no">065</span><span id="line-65"> * Builds a TableRecordReader. If no TableRecordReader was provided, uses the default.</span> |
| <span class="source-line-no">066</span><span id="line-66"> * @param split The split to work with.</span> |
| <span class="source-line-no">067</span><span id="line-67"> * @param context The current context.</span> |
| <span class="source-line-no">068</span><span id="line-68"> * @return The newly created record reader.</span> |
| <span class="source-line-no">069</span><span id="line-69"> * @throws IOException When creating the reader fails.</span> |
| <span class="source-line-no">070</span><span id="line-70"> * @throws InterruptedException when record reader initialization fails</span> |
| <span class="source-line-no">071</span><span id="line-71"> * @see InputFormat#createRecordReader(InputSplit, TaskAttemptContext)</span> |
| <span class="source-line-no">072</span><span id="line-72"> */</span> |
| <span class="source-line-no">073</span><span id="line-73"> @Override</span> |
| <span class="source-line-no">074</span><span id="line-74"> public RecordReader<ImmutableBytesWritable, Result> createRecordReader(InputSplit split,</span> |
| <span class="source-line-no">075</span><span id="line-75"> TaskAttemptContext context) throws IOException, InterruptedException {</span> |
| <span class="source-line-no">076</span><span id="line-76"> TableSplit tSplit = (TableSplit) split;</span> |
| <span class="source-line-no">077</span><span id="line-77"> LOG.info(MessageFormat.format("Input split length: {0} bytes.", tSplit.getLength()));</span> |
| <span class="source-line-no">078</span><span id="line-78"></span> |
| <span class="source-line-no">079</span><span id="line-79"> if (tSplit.getTable() == null) {</span> |
| <span class="source-line-no">080</span><span id="line-80"> throw new IOException("Cannot create a record reader because of a"</span> |
| <span class="source-line-no">081</span><span id="line-81"> + " previous error. Please look at the previous logs lines from"</span> |
| <span class="source-line-no">082</span><span id="line-82"> + " the task's full log for more details.");</span> |
| <span class="source-line-no">083</span><span id="line-83"> }</span> |
| <span class="source-line-no">084</span><span id="line-84"> final Connection connection = ConnectionFactory.createConnection(context.getConfiguration());</span> |
| <span class="source-line-no">085</span><span id="line-85"> Table table = connection.getTable(tSplit.getTable());</span> |
| <span class="source-line-no">086</span><span id="line-86"></span> |
| <span class="source-line-no">087</span><span id="line-87"> if (this.tableRecordReader == null) {</span> |
| <span class="source-line-no">088</span><span id="line-88"> this.tableRecordReader = new TableRecordReader();</span> |
| <span class="source-line-no">089</span><span id="line-89"> }</span> |
| <span class="source-line-no">090</span><span id="line-90"> final TableRecordReader trr = this.tableRecordReader;</span> |
| <span class="source-line-no">091</span><span id="line-91"></span> |
| <span class="source-line-no">092</span><span id="line-92"> try {</span> |
| <span class="source-line-no">093</span><span id="line-93"> Scan sc = tSplit.getScan();</span> |
| <span class="source-line-no">094</span><span id="line-94"> sc.withStartRow(tSplit.getStartRow());</span> |
| <span class="source-line-no">095</span><span id="line-95"> sc.withStopRow(tSplit.getEndRow());</span> |
| <span class="source-line-no">096</span><span id="line-96"> trr.setScan(sc);</span> |
| <span class="source-line-no">097</span><span id="line-97"> trr.setTable(table);</span> |
| <span class="source-line-no">098</span><span id="line-98"> return new RecordReader<ImmutableBytesWritable, Result>() {</span> |
| <span class="source-line-no">099</span><span id="line-99"></span> |
| <span class="source-line-no">100</span><span id="line-100"> @Override</span> |
| <span class="source-line-no">101</span><span id="line-101"> public void close() throws IOException {</span> |
| <span class="source-line-no">102</span><span id="line-102"> trr.close();</span> |
| <span class="source-line-no">103</span><span id="line-103"> connection.close();</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"> @Override</span> |
| <span class="source-line-no">107</span><span id="line-107"> public ImmutableBytesWritable getCurrentKey() throws IOException, InterruptedException {</span> |
| <span class="source-line-no">108</span><span id="line-108"> return trr.getCurrentKey();</span> |
| <span class="source-line-no">109</span><span id="line-109"> }</span> |
| <span class="source-line-no">110</span><span id="line-110"></span> |
| <span class="source-line-no">111</span><span id="line-111"> @Override</span> |
| <span class="source-line-no">112</span><span id="line-112"> public Result getCurrentValue() throws IOException, InterruptedException {</span> |
| <span class="source-line-no">113</span><span id="line-113"> return trr.getCurrentValue();</span> |
| <span class="source-line-no">114</span><span id="line-114"> }</span> |
| <span class="source-line-no">115</span><span id="line-115"></span> |
| <span class="source-line-no">116</span><span id="line-116"> @Override</span> |
| <span class="source-line-no">117</span><span id="line-117"> public float getProgress() throws IOException, InterruptedException {</span> |
| <span class="source-line-no">118</span><span id="line-118"> return trr.getProgress();</span> |
| <span class="source-line-no">119</span><span id="line-119"> }</span> |
| <span class="source-line-no">120</span><span id="line-120"></span> |
| <span class="source-line-no">121</span><span id="line-121"> @Override</span> |
| <span class="source-line-no">122</span><span id="line-122"> public void initialize(InputSplit inputsplit, TaskAttemptContext context)</span> |
| <span class="source-line-no">123</span><span id="line-123"> throws IOException, InterruptedException {</span> |
| <span class="source-line-no">124</span><span id="line-124"> trr.initialize(inputsplit, context);</span> |
| <span class="source-line-no">125</span><span id="line-125"> }</span> |
| <span class="source-line-no">126</span><span id="line-126"></span> |
| <span class="source-line-no">127</span><span id="line-127"> @Override</span> |
| <span class="source-line-no">128</span><span id="line-128"> public boolean nextKeyValue() throws IOException, InterruptedException {</span> |
| <span class="source-line-no">129</span><span id="line-129"> return trr.nextKeyValue();</span> |
| <span class="source-line-no">130</span><span id="line-130"> }</span> |
| <span class="source-line-no">131</span><span id="line-131"> };</span> |
| <span class="source-line-no">132</span><span id="line-132"> } catch (IOException ioe) {</span> |
| <span class="source-line-no">133</span><span id="line-133"> // If there is an exception make sure that all</span> |
| <span class="source-line-no">134</span><span id="line-134"> // resources are closed and released.</span> |
| <span class="source-line-no">135</span><span id="line-135"> trr.close();</span> |
| <span class="source-line-no">136</span><span id="line-136"> connection.close();</span> |
| <span class="source-line-no">137</span><span id="line-137"> throw ioe;</span> |
| <span class="source-line-no">138</span><span id="line-138"> }</span> |
| <span class="source-line-no">139</span><span id="line-139"> }</span> |
| <span class="source-line-no">140</span><span id="line-140"></span> |
| <span class="source-line-no">141</span><span id="line-141"> /**</span> |
| <span class="source-line-no">142</span><span id="line-142"> * Calculates the splits that will serve as input for the map tasks. The number of splits matches</span> |
| <span class="source-line-no">143</span><span id="line-143"> * the number of regions in a table.</span> |
| <span class="source-line-no">144</span><span id="line-144"> * @param context The current job context.</span> |
| <span class="source-line-no">145</span><span id="line-145"> * @return The list of input splits.</span> |
| <span class="source-line-no">146</span><span id="line-146"> * @throws IOException When creating the list of splits fails.</span> |
| <span class="source-line-no">147</span><span id="line-147"> * @see InputFormat#getSplits(org.apache.hadoop.mapreduce.JobContext)</span> |
| <span class="source-line-no">148</span><span id="line-148"> */</span> |
| <span class="source-line-no">149</span><span id="line-149"> @Override</span> |
| <span class="source-line-no">150</span><span id="line-150"> public List<InputSplit> getSplits(JobContext context) throws IOException {</span> |
| <span class="source-line-no">151</span><span id="line-151"> if (scans.isEmpty()) {</span> |
| <span class="source-line-no">152</span><span id="line-152"> throw new IOException("No scans were provided.");</span> |
| <span class="source-line-no">153</span><span id="line-153"> }</span> |
| <span class="source-line-no">154</span><span id="line-154"></span> |
| <span class="source-line-no">155</span><span id="line-155"> Map<TableName, List<Scan>> tableMaps = new HashMap<>();</span> |
| <span class="source-line-no">156</span><span id="line-156"> for (Scan scan : scans) {</span> |
| <span class="source-line-no">157</span><span id="line-157"> byte[] tableNameBytes = scan.getAttribute(Scan.SCAN_ATTRIBUTES_TABLE_NAME);</span> |
| <span class="source-line-no">158</span><span id="line-158"> if (tableNameBytes == null) throw new IOException("A scan object did not have a table name");</span> |
| <span class="source-line-no">159</span><span id="line-159"></span> |
| <span class="source-line-no">160</span><span id="line-160"> TableName tableName = TableName.valueOf(tableNameBytes);</span> |
| <span class="source-line-no">161</span><span id="line-161"></span> |
| <span class="source-line-no">162</span><span id="line-162"> List<Scan> scanList = tableMaps.get(tableName);</span> |
| <span class="source-line-no">163</span><span id="line-163"> if (scanList == null) {</span> |
| <span class="source-line-no">164</span><span id="line-164"> scanList = new ArrayList<>();</span> |
| <span class="source-line-no">165</span><span id="line-165"> tableMaps.put(tableName, scanList);</span> |
| <span class="source-line-no">166</span><span id="line-166"> }</span> |
| <span class="source-line-no">167</span><span id="line-167"> scanList.add(scan);</span> |
| <span class="source-line-no">168</span><span id="line-168"> }</span> |
| <span class="source-line-no">169</span><span id="line-169"></span> |
| <span class="source-line-no">170</span><span id="line-170"> List<InputSplit> splits = new ArrayList<>();</span> |
| <span class="source-line-no">171</span><span id="line-171"> Iterator iter = tableMaps.entrySet().iterator();</span> |
| <span class="source-line-no">172</span><span id="line-172"> // Make a single Connection to the Cluster and use it across all tables.</span> |
| <span class="source-line-no">173</span><span id="line-173"> try (Connection conn = ConnectionFactory.createConnection(context.getConfiguration())) {</span> |
| <span class="source-line-no">174</span><span id="line-174"> while (iter.hasNext()) {</span> |
| <span class="source-line-no">175</span><span id="line-175"> Map.Entry<TableName, List<Scan>> entry = (Map.Entry<TableName, List<Scan>>) iter.next();</span> |
| <span class="source-line-no">176</span><span id="line-176"> TableName tableName = entry.getKey();</span> |
| <span class="source-line-no">177</span><span id="line-177"> List<Scan> scanList = entry.getValue();</span> |
| <span class="source-line-no">178</span><span id="line-178"> try (Table table = conn.getTable(tableName);</span> |
| <span class="source-line-no">179</span><span id="line-179"> RegionLocator regionLocator = conn.getRegionLocator(tableName)) {</span> |
| <span class="source-line-no">180</span><span id="line-180"> RegionSizeCalculator sizeCalculator =</span> |
| <span class="source-line-no">181</span><span id="line-181"> new RegionSizeCalculator(regionLocator, conn.getAdmin());</span> |
| <span class="source-line-no">182</span><span id="line-182"> Pair<byte[][], byte[][]> keys = regionLocator.getStartEndKeys();</span> |
| <span class="source-line-no">183</span><span id="line-183"> for (Scan scan : scanList) {</span> |
| <span class="source-line-no">184</span><span id="line-184"> if (keys == null || keys.getFirst() == null || keys.getFirst().length == 0) {</span> |
| <span class="source-line-no">185</span><span id="line-185"> throw new IOException(</span> |
| <span class="source-line-no">186</span><span id="line-186"> "Expecting at least one region for table : " + tableName.getNameAsString());</span> |
| <span class="source-line-no">187</span><span id="line-187"> }</span> |
| <span class="source-line-no">188</span><span id="line-188"> int count = 0;</span> |
| <span class="source-line-no">189</span><span id="line-189"></span> |
| <span class="source-line-no">190</span><span id="line-190"> byte[] startRow = scan.getStartRow();</span> |
| <span class="source-line-no">191</span><span id="line-191"> byte[] stopRow = scan.getStopRow();</span> |
| <span class="source-line-no">192</span><span id="line-192"></span> |
| <span class="source-line-no">193</span><span id="line-193"> for (int i = 0; i < keys.getFirst().length; i++) {</span> |
| <span class="source-line-no">194</span><span id="line-194"> if (!includeRegionInSplit(keys.getFirst()[i], keys.getSecond()[i])) {</span> |
| <span class="source-line-no">195</span><span id="line-195"> continue;</span> |
| <span class="source-line-no">196</span><span id="line-196"> }</span> |
| <span class="source-line-no">197</span><span id="line-197"></span> |
| <span class="source-line-no">198</span><span id="line-198"> if (</span> |
| <span class="source-line-no">199</span><span id="line-199"> (startRow.length == 0 || keys.getSecond()[i].length == 0</span> |
| <span class="source-line-no">200</span><span id="line-200"> || Bytes.compareTo(startRow, keys.getSecond()[i]) < 0)</span> |
| <span class="source-line-no">201</span><span id="line-201"> && (stopRow.length == 0 || Bytes.compareTo(stopRow, keys.getFirst()[i]) > 0)</span> |
| <span class="source-line-no">202</span><span id="line-202"> ) {</span> |
| <span class="source-line-no">203</span><span id="line-203"> byte[] splitStart =</span> |
| <span class="source-line-no">204</span><span id="line-204"> startRow.length == 0 || Bytes.compareTo(keys.getFirst()[i], startRow) >= 0</span> |
| <span class="source-line-no">205</span><span id="line-205"> ? keys.getFirst()[i]</span> |
| <span class="source-line-no">206</span><span id="line-206"> : startRow;</span> |
| <span class="source-line-no">207</span><span id="line-207"> byte[] splitStop =</span> |
| <span class="source-line-no">208</span><span id="line-208"> (stopRow.length == 0 || Bytes.compareTo(keys.getSecond()[i], stopRow) <= 0)</span> |
| <span class="source-line-no">209</span><span id="line-209"> && keys.getSecond()[i].length > 0 ? keys.getSecond()[i] : stopRow;</span> |
| <span class="source-line-no">210</span><span id="line-210"></span> |
| <span class="source-line-no">211</span><span id="line-211"> HRegionLocation hregionLocation =</span> |
| <span class="source-line-no">212</span><span id="line-212"> regionLocator.getRegionLocation(keys.getFirst()[i], false);</span> |
| <span class="source-line-no">213</span><span id="line-213"> String regionHostname = hregionLocation.getHostname();</span> |
| <span class="source-line-no">214</span><span id="line-214"> RegionInfo regionInfo = hregionLocation.getRegion();</span> |
| <span class="source-line-no">215</span><span id="line-215"> String encodedRegionName = regionInfo.getEncodedName();</span> |
| <span class="source-line-no">216</span><span id="line-216"> long regionSize = sizeCalculator.getRegionSize(regionInfo.getRegionName());</span> |
| <span class="source-line-no">217</span><span id="line-217"></span> |
| <span class="source-line-no">218</span><span id="line-218"> TableSplit split = new TableSplit(table.getName(), scan, splitStart, splitStop,</span> |
| <span class="source-line-no">219</span><span id="line-219"> regionHostname, encodedRegionName, regionSize);</span> |
| <span class="source-line-no">220</span><span id="line-220"></span> |
| <span class="source-line-no">221</span><span id="line-221"> splits.add(split);</span> |
| <span class="source-line-no">222</span><span id="line-222"></span> |
| <span class="source-line-no">223</span><span id="line-223"> if (LOG.isDebugEnabled()) {</span> |
| <span class="source-line-no">224</span><span id="line-224"> LOG.debug("getSplits: split -> " + (count++) + " -> " + split);</span> |
| <span class="source-line-no">225</span><span id="line-225"> }</span> |
| <span class="source-line-no">226</span><span id="line-226"> }</span> |
| <span class="source-line-no">227</span><span id="line-227"> }</span> |
| <span class="source-line-no">228</span><span id="line-228"> }</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"> }</span> |
| <span class="source-line-no">232</span><span id="line-232"></span> |
| <span class="source-line-no">233</span><span id="line-233"> return splits;</span> |
| <span class="source-line-no">234</span><span id="line-234"> }</span> |
| <span class="source-line-no">235</span><span id="line-235"></span> |
| <span class="source-line-no">236</span><span id="line-236"> /**</span> |
| <span class="source-line-no">237</span><span id="line-237"> * Test if the given region is to be included in the InputSplit while splitting the regions of a</span> |
| <span class="source-line-no">238</span><span id="line-238"> * table.</span> |
| <span class="source-line-no">239</span><span id="line-239"> * <p></span> |
| <span class="source-line-no">240</span><span id="line-240"> * This optimization is effective when there is a specific reasoning to exclude an entire region</span> |
| <span class="source-line-no">241</span><span id="line-241"> * from the M-R job, (and hence, not contributing to the InputSplit), given the start and end keys</span> |
| <span class="source-line-no">242</span><span id="line-242"> * of the same. <br></span> |
| <span class="source-line-no">243</span><span id="line-243"> * Useful when we need to remember the last-processed top record and revisit the [last, current)</span> |
| <span class="source-line-no">244</span><span id="line-244"> * interval for M-R processing, continuously. In addition to reducing InputSplits, reduces the</span> |
| <span class="source-line-no">245</span><span id="line-245"> * load on the region server as well, due to the ordering of the keys. <br></span> |
| <span class="source-line-no">246</span><span id="line-246"> * <br></span> |
| <span class="source-line-no">247</span><span id="line-247"> * Note: It is possible that <code>endKey.length() == 0 </code> , for the last (recent) region.</span> |
| <span class="source-line-no">248</span><span id="line-248"> * <br></span> |
| <span class="source-line-no">249</span><span id="line-249"> * Override this method, if you want to bulk exclude regions altogether from M-R. By default, no</span> |
| <span class="source-line-no">250</span><span id="line-250"> * region is excluded( i.e. all regions are included).</span> |
| <span class="source-line-no">251</span><span id="line-251"> * @param startKey Start key of the region</span> |
| <span class="source-line-no">252</span><span id="line-252"> * @param endKey End key of the region</span> |
| <span class="source-line-no">253</span><span id="line-253"> * @return true, if this region needs to be included as part of the input (default).</span> |
| <span class="source-line-no">254</span><span id="line-254"> */</span> |
| <span class="source-line-no">255</span><span id="line-255"> protected boolean includeRegionInSplit(final byte[] startKey, final byte[] endKey) {</span> |
| <span class="source-line-no">256</span><span id="line-256"> return true;</span> |
| <span class="source-line-no">257</span><span id="line-257"> }</span> |
| <span class="source-line-no">258</span><span id="line-258"></span> |
| <span class="source-line-no">259</span><span id="line-259"> /**</span> |
| <span class="source-line-no">260</span><span id="line-260"> * Allows subclasses to get the list of {@link Scan} objects.</span> |
| <span class="source-line-no">261</span><span id="line-261"> */</span> |
| <span class="source-line-no">262</span><span id="line-262"> protected List<Scan> getScans() {</span> |
| <span class="source-line-no">263</span><span id="line-263"> return this.scans;</span> |
| <span class="source-line-no">264</span><span id="line-264"> }</span> |
| <span class="source-line-no">265</span><span id="line-265"></span> |
| <span class="source-line-no">266</span><span id="line-266"> /**</span> |
| <span class="source-line-no">267</span><span id="line-267"> * Allows subclasses to set the list of {@link Scan} objects.</span> |
| <span class="source-line-no">268</span><span id="line-268"> * @param scans The list of {@link Scan} used to define the input</span> |
| <span class="source-line-no">269</span><span id="line-269"> */</span> |
| <span class="source-line-no">270</span><span id="line-270"> protected void setScans(List<Scan> scans) {</span> |
| <span class="source-line-no">271</span><span id="line-271"> this.scans = scans;</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"> * Allows subclasses to set the {@link TableRecordReader}.</span> |
| <span class="source-line-no">276</span><span id="line-276"> * @param tableRecordReader A different {@link TableRecordReader} implementation.</span> |
| <span class="source-line-no">277</span><span id="line-277"> */</span> |
| <span class="source-line-no">278</span><span id="line-278"> protected void setTableRecordReader(TableRecordReader tableRecordReader) {</span> |
| <span class="source-line-no">279</span><span id="line-279"> this.tableRecordReader = tableRecordReader;</span> |
| <span class="source-line-no">280</span><span id="line-280"> }</span> |
| <span class="source-line-no">281</span><span id="line-281">}</span> |
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| </pre> |
| </div> |
| </main> |
| </body> |
| </html> |
