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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.nio.charset.StandardCharsets;</span> |
| <span class="source-line-no">022</span><span id="line-22">import org.apache.hadoop.hbase.KeyValue;</span> |
| <span class="source-line-no">023</span><span id="line-23">import org.apache.hadoop.hbase.client.Durability;</span> |
| <span class="source-line-no">024</span><span id="line-24">import org.apache.hadoop.hbase.client.Put;</span> |
| <span class="source-line-no">025</span><span id="line-25">import org.apache.hadoop.hbase.io.ImmutableBytesWritable;</span> |
| <span class="source-line-no">026</span><span id="line-26">import org.apache.hadoop.hbase.util.Bytes;</span> |
| <span class="source-line-no">027</span><span id="line-27">import org.apache.hadoop.io.LongWritable;</span> |
| <span class="source-line-no">028</span><span id="line-28">import org.apache.hadoop.io.Text;</span> |
| <span class="source-line-no">029</span><span id="line-29"></span> |
| <span class="source-line-no">030</span><span id="line-30">/**</span> |
| <span class="source-line-no">031</span><span id="line-31"> * Dummy mapper used for unit tests to verify that the mapper can be injected. This approach would</span> |
| <span class="source-line-no">032</span><span id="line-32"> * be used if a custom transformation needed to be done after reading the input data before writing</span> |
| <span class="source-line-no">033</span><span id="line-33"> * it to HFiles.</span> |
| <span class="source-line-no">034</span><span id="line-34"> */</span> |
| <span class="source-line-no">035</span><span id="line-35">public class TsvImporterCustomTestMapper extends TsvImporterMapper {</span> |
| <span class="source-line-no">036</span><span id="line-36"> @Override</span> |
| <span class="source-line-no">037</span><span id="line-37"> protected void setup(Context context) {</span> |
| <span class="source-line-no">038</span><span id="line-38"> doSetup(context);</span> |
| <span class="source-line-no">039</span><span id="line-39"> }</span> |
| <span class="source-line-no">040</span><span id="line-40"></span> |
| <span class="source-line-no">041</span><span id="line-41"> /**</span> |
| <span class="source-line-no">042</span><span id="line-42"> * Convert a line of TSV text into an HBase table row after transforming the values by multiplying</span> |
| <span class="source-line-no">043</span><span id="line-43"> * them by 3.</span> |
| <span class="source-line-no">044</span><span id="line-44"> */</span> |
| <span class="source-line-no">045</span><span id="line-45"> @Override</span> |
| <span class="source-line-no">046</span><span id="line-46"> public void map(LongWritable offset, Text value, Context context) throws IOException {</span> |
| <span class="source-line-no">047</span><span id="line-47"> byte[] family = Bytes.toBytes("FAM");</span> |
| <span class="source-line-no">048</span><span id="line-48"> final byte[][] qualifiers = { Bytes.toBytes("A"), Bytes.toBytes("B") };</span> |
| <span class="source-line-no">049</span><span id="line-49"></span> |
| <span class="source-line-no">050</span><span id="line-50"> // do some basic line parsing</span> |
| <span class="source-line-no">051</span><span id="line-51"> byte[] lineBytes = value.getBytes();</span> |
| <span class="source-line-no">052</span><span id="line-52"> String[] valueTokens = new String(lineBytes, StandardCharsets.UTF_8).split("\u001b");</span> |
| <span class="source-line-no">053</span><span id="line-53"></span> |
| <span class="source-line-no">054</span><span id="line-54"> // create the rowKey and Put</span> |
| <span class="source-line-no">055</span><span id="line-55"> ImmutableBytesWritable rowKey = new ImmutableBytesWritable(Bytes.toBytes(valueTokens[0]));</span> |
| <span class="source-line-no">056</span><span id="line-56"> Put put = new Put(rowKey.copyBytes());</span> |
| <span class="source-line-no">057</span><span id="line-57"> put.setDurability(Durability.SKIP_WAL);</span> |
| <span class="source-line-no">058</span><span id="line-58"></span> |
| <span class="source-line-no">059</span><span id="line-59"> // The value should look like this: VALUE1 or VALUE2. Let's multiply</span> |
| <span class="source-line-no">060</span><span id="line-60"> // the integer by 3</span> |
| <span class="source-line-no">061</span><span id="line-61"> for (int i = 1; i < valueTokens.length; i++) {</span> |
| <span class="source-line-no">062</span><span id="line-62"> String prefix = valueTokens[i].substring(0, "VALUE".length());</span> |
| <span class="source-line-no">063</span><span id="line-63"> String suffix = valueTokens[i].substring("VALUE".length());</span> |
| <span class="source-line-no">064</span><span id="line-64"> String newValue = prefix + Integer.parseInt(suffix) * 3;</span> |
| <span class="source-line-no">065</span><span id="line-65"></span> |
| <span class="source-line-no">066</span><span id="line-66"> KeyValue kv =</span> |
| <span class="source-line-no">067</span><span id="line-67"> new KeyValue(rowKey.copyBytes(), family, qualifiers[i - 1], Bytes.toBytes(newValue));</span> |
| <span class="source-line-no">068</span><span id="line-68"> put.add(kv);</span> |
| <span class="source-line-no">069</span><span id="line-69"> }</span> |
| <span class="source-line-no">070</span><span id="line-70"></span> |
| <span class="source-line-no">071</span><span id="line-71"> try {</span> |
| <span class="source-line-no">072</span><span id="line-72"> context.write(rowKey, put);</span> |
| <span class="source-line-no">073</span><span id="line-73"> } catch (InterruptedException e) {</span> |
| <span class="source-line-no">074</span><span id="line-74"> e.printStackTrace();</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">}</span> |
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| </pre> |
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