/* * 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 org.apache.accumulo.core.client.AccumuloClient; import org.apache.accumulo.core.data.Mutation; import org.apache.accumulo.core.data.Value; 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)) { log.info("Creating table " + opts.tableName); client.tableOperations().create(opts.tableName); SortedSet<Text> splits = new TreeSet<>(); 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"); for (String[] array : new String[][] {numbers, lower, upper}) { for (String s : array) { splits.add(new Text(s)); } } client.tableOperations().addSplits(opts.tableName, splits); } } TextInputFormat.addInputPath(job, new Path(opts.inputDirectory)); System.exit(job.waitForCompletion(true) ? 0 : 1); } }