| /* |
| * 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.mapreduce; |
| |
| import java.io.IOException; |
| import java.util.SortedSet; |
| import java.util.TreeSet; |
| import java.util.stream.Collectors; |
| import java.util.stream.Stream; |
| |
| import org.apache.accumulo.core.client.AccumuloClient; |
| import org.apache.accumulo.core.client.admin.NewTableConfiguration; |
| import org.apache.accumulo.core.data.Mutation; |
| import org.apache.accumulo.core.data.Value; |
| import org.apache.accumulo.examples.Common; |
| import org.apache.accumulo.examples.cli.ClientOpts; |
| import org.apache.accumulo.hadoop.mapreduce.AccumuloOutputFormat; |
| import org.apache.hadoop.fs.Path; |
| import org.apache.hadoop.io.LongWritable; |
| import org.apache.hadoop.io.Text; |
| import org.apache.hadoop.mapreduce.Job; |
| import org.apache.hadoop.mapreduce.Mapper; |
| import org.apache.hadoop.mapreduce.lib.input.TextInputFormat; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| import com.beust.jcommander.Parameter; |
| |
| /** |
| * Map job to ingest n-gram files from |
| * http://storage.googleapis.com/books/ngrams/books/datasetsv2.html |
| */ |
| public class NGramIngest { |
| |
| private static final Logger log = LoggerFactory.getLogger(NGramIngest.class); |
| |
| static class Opts extends ClientOpts { |
| @Parameter(names = {"-t", "--table"}, required = true, description = "table to use") |
| String tableName; |
| @Parameter(names = {"-i", "--input"}, required = true, description = "HDFS input directory") |
| String inputDirectory; |
| } |
| |
| static class NGramMapper extends Mapper<LongWritable,Text,Text,Mutation> { |
| |
| @Override |
| protected void map(LongWritable location, Text value, Context context) |
| throws IOException, InterruptedException { |
| String[] parts = value.toString().split("\\t"); |
| if (parts.length >= 4) { |
| Mutation m = new Mutation(parts[0]); |
| m.put(parts[1], String.format("%010d", Long.parseLong(parts[2])), |
| new Value(parts[3].trim().getBytes())); |
| context.write(null, m); |
| } |
| } |
| } |
| |
| public static void main(String[] args) throws Exception { |
| Opts opts = new Opts(); |
| opts.parseArgs(NGramIngest.class.getName(), args); |
| |
| Job job = Job.getInstance(opts.getHadoopConfig()); |
| job.setJobName(NGramIngest.class.getSimpleName()); |
| job.setJarByClass(NGramIngest.class); |
| |
| job.setInputFormatClass(TextInputFormat.class); |
| job.setOutputFormatClass(AccumuloOutputFormat.class); |
| AccumuloOutputFormat.configure().clientProperties(opts.getClientProperties()) |
| .defaultTable(opts.tableName).store(job); |
| |
| job.setMapperClass(NGramMapper.class); |
| job.setMapOutputKeyClass(Text.class); |
| job.setMapOutputValueClass(Mutation.class); |
| |
| job.setNumReduceTasks(0); |
| job.setSpeculativeExecution(false); |
| |
| try (AccumuloClient client = opts.createAccumuloClient()) { |
| if (!client.tableOperations().exists(opts.tableName)) { |
| String[] numbers = "1 2 3 4 5 6 7 8 9".split("\\s"); |
| String[] lower = "a b c d e f g h i j k l m n o p q r s t u v w x y z".split("\\s"); |
| String[] upper = "A B C D E F G H I J K L M N O P Q R S T U V W X Y Z".split("\\s"); |
| |
| SortedSet<Text> splits = Stream.of(numbers, lower, upper).flatMap(Stream::of).map(Text::new) |
| .collect(Collectors.toCollection(TreeSet::new)); |
| |
| var newTableConfig = new NewTableConfiguration().withSplits(splits); |
| |
| log.info("Creating table " + opts.tableName); |
| Common.createTableWithNamespace(client, opts.tableName, newTableConfig); |
| } |
| } |
| |
| TextInputFormat.addInputPath(job, new Path(opts.inputDirectory)); |
| System.exit(job.waitForCompletion(true) ? 0 : 1); |
| } |
| } |