| /* |
| * Licensed to the Apache Software Foundation (ASF) under one or more |
| * contributor license agreements. See the NOTICE file distributed with |
| * this work for additional information regarding copyright ownership. |
| * The ASF licenses this file to You under the Apache License, Version 2.0 |
| * (the "License"); you may not use this file except in compliance with |
| * the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| package org.apache.accumulo.examples.simple.mapreduce; |
| |
| import java.io.IOException; |
| import java.util.Collections; |
| |
| import org.apache.accumulo.core.cli.MapReduceClientOnRequiredTable; |
| import org.apache.accumulo.core.client.mapreduce.AccumuloInputFormat; |
| import org.apache.accumulo.core.client.mapreduce.AccumuloOutputFormat; |
| import org.apache.accumulo.core.data.Key; |
| import org.apache.accumulo.core.data.Mutation; |
| import org.apache.accumulo.core.data.Value; |
| import org.apache.accumulo.core.util.Base64; |
| import org.apache.accumulo.core.util.Pair; |
| import org.apache.hadoop.conf.Configuration; |
| import org.apache.hadoop.conf.Configured; |
| import org.apache.hadoop.io.MD5Hash; |
| import org.apache.hadoop.io.Text; |
| import org.apache.hadoop.mapreduce.Job; |
| import org.apache.hadoop.mapreduce.Mapper; |
| import org.apache.hadoop.util.Tool; |
| import org.apache.hadoop.util.ToolRunner; |
| |
| import com.beust.jcommander.Parameter; |
| |
| public class RowHash extends Configured implements Tool { |
| /** |
| * The Mapper class that given a row number, will generate the appropriate output line. |
| */ |
| public static class HashDataMapper extends Mapper<Key,Value,Text,Mutation> { |
| @Override |
| public void map(Key row, Value data, Context context) throws IOException, InterruptedException { |
| Mutation m = new Mutation(row.getRow()); |
| m.put(new Text("cf-HASHTYPE"), new Text("cq-MD5BASE64"), new Value(Base64.encodeBase64(MD5Hash.digest(data.toString()).getDigest()))); |
| context.write(null, m); |
| context.progress(); |
| } |
| |
| @Override |
| public void setup(Context job) {} |
| } |
| |
| private static class Opts extends MapReduceClientOnRequiredTable { |
| @Parameter(names = "--column", required = true) |
| String column; |
| } |
| |
| @Override |
| public int run(String[] args) throws Exception { |
| Job job = Job.getInstance(getConf()); |
| job.setJobName(this.getClass().getName()); |
| job.setJarByClass(this.getClass()); |
| Opts opts = new Opts(); |
| opts.parseArgs(RowHash.class.getName(), args); |
| job.setInputFormatClass(AccumuloInputFormat.class); |
| opts.setAccumuloConfigs(job); |
| |
| String col = opts.column; |
| int idx = col.indexOf(":"); |
| Text cf = new Text(idx < 0 ? col : col.substring(0, idx)); |
| Text cq = idx < 0 ? null : new Text(col.substring(idx + 1)); |
| if (cf.getLength() > 0) |
| AccumuloInputFormat.fetchColumns(job, Collections.singleton(new Pair<>(cf, cq))); |
| |
| job.setMapperClass(HashDataMapper.class); |
| job.setMapOutputKeyClass(Text.class); |
| job.setMapOutputValueClass(Mutation.class); |
| |
| job.setNumReduceTasks(0); |
| |
| job.setOutputFormatClass(AccumuloOutputFormat.class); |
| |
| job.waitForCompletion(true); |
| return job.isSuccessful() ? 0 : 1; |
| } |
| |
| public static void main(String[] args) throws Exception { |
| ToolRunner.run(new Configuration(), new RowHash(), args); |
| } |
| } |