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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>package org.apache.hadoop.hbase.mapreduce;<a name="line.18"></a> |
| <span class="sourceLineNo">019</span><a name="line.19"></a> |
| <span class="sourceLineNo">020</span>import java.io.IOException;<a name="line.20"></a> |
| <span class="sourceLineNo">021</span>import org.apache.hadoop.hbase.client.Result;<a name="line.21"></a> |
| <span class="sourceLineNo">022</span>import org.apache.hadoop.hbase.client.Scan;<a name="line.22"></a> |
| <span class="sourceLineNo">023</span>import org.apache.hadoop.hbase.io.ImmutableBytesWritable;<a name="line.23"></a> |
| <span class="sourceLineNo">024</span>import org.apache.hadoop.mapreduce.Job;<a name="line.24"></a> |
| <span class="sourceLineNo">025</span>import org.apache.yetus.audience.InterfaceAudience;<a name="line.25"></a> |
| <span class="sourceLineNo">026</span><a name="line.26"></a> |
| <span class="sourceLineNo">027</span>/**<a name="line.27"></a> |
| <span class="sourceLineNo">028</span> * Pass the given key and record as-is to the reduce phase.<a name="line.28"></a> |
| <span class="sourceLineNo">029</span> */<a name="line.29"></a> |
| <span class="sourceLineNo">030</span>@InterfaceAudience.Public<a name="line.30"></a> |
| <span class="sourceLineNo">031</span>public class IdentityTableMapper extends TableMapper<ImmutableBytesWritable, Result> {<a name="line.31"></a> |
| <span class="sourceLineNo">032</span><a name="line.32"></a> |
| <span class="sourceLineNo">033</span> /**<a name="line.33"></a> |
| <span class="sourceLineNo">034</span> * Use this before submitting a TableMap job. It will appropriately set up the job.<a name="line.34"></a> |
| <span class="sourceLineNo">035</span> * @param table The table name.<a name="line.35"></a> |
| <span class="sourceLineNo">036</span> * @param scan The scan with the columns to scan.<a name="line.36"></a> |
| <span class="sourceLineNo">037</span> * @param mapper The mapper class.<a name="line.37"></a> |
| <span class="sourceLineNo">038</span> * @param job The job configuration.<a name="line.38"></a> |
| <span class="sourceLineNo">039</span> * @throws IOException When setting up the job fails.<a name="line.39"></a> |
| <span class="sourceLineNo">040</span> */<a name="line.40"></a> |
| <span class="sourceLineNo">041</span> @SuppressWarnings("rawtypes")<a name="line.41"></a> |
| <span class="sourceLineNo">042</span> public static void initJob(String table, Scan scan, Class<? extends TableMapper> mapper, Job job)<a name="line.42"></a> |
| <span class="sourceLineNo">043</span> throws IOException {<a name="line.43"></a> |
| <span class="sourceLineNo">044</span> TableMapReduceUtil.initTableMapperJob(table, scan, mapper, ImmutableBytesWritable.class,<a name="line.44"></a> |
| <span class="sourceLineNo">045</span> Result.class, job);<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> /**<a name="line.48"></a> |
| <span class="sourceLineNo">049</span> * Pass the key, value to reduce.<a name="line.49"></a> |
| <span class="sourceLineNo">050</span> * @param key The current key.<a name="line.50"></a> |
| <span class="sourceLineNo">051</span> * @param value The current value.<a name="line.51"></a> |
| <span class="sourceLineNo">052</span> * @param context The current context.<a name="line.52"></a> |
| <span class="sourceLineNo">053</span> * @throws IOException When writing the record fails.<a name="line.53"></a> |
| <span class="sourceLineNo">054</span> * @throws InterruptedException When the job is aborted.<a name="line.54"></a> |
| <span class="sourceLineNo">055</span> */<a name="line.55"></a> |
| <span class="sourceLineNo">056</span> public void map(ImmutableBytesWritable key, Result value, Context context)<a name="line.56"></a> |
| <span class="sourceLineNo">057</span> throws IOException, InterruptedException {<a name="line.57"></a> |
| <span class="sourceLineNo">058</span> context.write(key, value);<a name="line.58"></a> |
| <span class="sourceLineNo">059</span> }<a name="line.59"></a> |
| <span class="sourceLineNo">060</span><a name="line.60"></a> |
| <span class="sourceLineNo">061</span>}<a name="line.61"></a> |
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