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   * Licensed to the Apache Software Foundation (ASF) under one
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   * to you under the Apache License, Version 2.0 (the
   * "License"); you may not use this file except in compliance
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   *
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  package org.apache.avro.mapred;
  
  import static org.junit.jupiter.api.Assertions.assertEquals;
  
  import java.io.File;
  import java.io.IOException;
  import java.util.StringTokenizer;
  import org.apache.avro.Schema;
  import org.apache.avro.util.Utf8;
  import org.apache.hadoop.fs.FileStatus;
  import org.apache.hadoop.fs.FileSystem;
  import org.apache.hadoop.fs.Path;
  import org.apache.hadoop.io.NullWritable;
  import org.apache.hadoop.mapred.FileInputFormat;
  import org.apache.hadoop.mapred.FileOutputFormat;
  import org.apache.hadoop.mapred.FileSplit;
  import org.apache.hadoop.mapred.JobClient;
  import org.apache.hadoop.mapred.JobConf;
  import org.apache.hadoop.mapred.Reporter;
  import org.junit.jupiter.api.Test;
  import org.junit.jupiter.api.io.TempDir;
  
  public class TestAvroMultipleOutputs {
  
    @TempDir
    public File INPUT_DIR;
  
    @TempDir
    public File OUTPUT_DIR;
  
    public static class MapImpl extends AvroMapper<Utf8, Pair<Utf8, Long>> {
      private AvroMultipleOutputs amos;
  
      public void configure(JobConf Job) {
        this.amos = new AvroMultipleOutputs(Job);
      }
  
      @Override
      public void map(Utf8 text, AvroCollector<Pair<Utf8, Long>> collector, Reporter reporter) throws IOException {
        StringTokenizer tokens = new StringTokenizer(text.toString());
        while (tokens.hasMoreTokens()) {
          String tok = tokens.nextToken();
          collector.collect(new Pair<>(new Utf8(tok), 1L));
          amos.getCollector("myavro2", reporter).collect(new Pair<Utf8, Long>(new Utf8(tok), 1L).toString());
        }
      }
  
      public void close() throws IOException {
        amos.close();
      }
    }
  
    public static class ReduceImpl extends AvroReducer<Utf8, Long, Pair<Utf8, Long>> {
      private AvroMultipleOutputs amos;
  
      public void configure(JobConf Job) {
        amos = new AvroMultipleOutputs(Job);
      }
  
      @Override
      public void reduce(Utf8 word, Iterable<Long> counts, AvroCollector<Pair<Utf8, Long>> collector, Reporter reporter)
          throws IOException {
        long sum = 0;
        for (long count : counts)
          sum += count;
        Pair<Utf8, Long> outputvalue = new Pair<>(word, sum);
        amos.getCollector("myavro", reporter).collect(outputvalue);
        amos.collect("myavro1", reporter, outputvalue.toString());
        amos.collect("myavro", reporter, new Pair<Utf8, Long>(new Utf8(""), 0L).getSchema(), outputvalue, "testavrofile");
        amos.collect("myavro", reporter, Schema.create(Schema.Type.STRING), outputvalue.toString(), "testavrofile1");
        collector.collect(new Pair<>(word, sum));
      }
  
      @Override
      public void close() throws IOException {
        amos.close();
      }
    }
  
    @Test
    void runTestsInOrder() throws Exception {
      String avroPath = OUTPUT_DIR.getPath();
      testJob(avroPath);
      testProjection(avroPath);
      testProjectionNewMethodsOne(avroPath);
      testProjectionNewMethodsTwo(avroPath);
      testProjection1(avroPath);
      testJobNoreducer();
      testProjectionNoreducer(avroPath);
    }
  
    @SuppressWarnings("deprecation")
    public void testJob(String pathOut) throws Exception {
      JobConf job = new JobConf();
  
      String pathIn = INPUT_DIR.getPath();
  
      File fileIn = new File(pathIn, "lines.avro");
      Path outputPath = new Path(pathOut);
  
      outputPath.getFileSystem(job).delete(outputPath);
  
      WordCountUtil.writeLinesFile(fileIn);
  
      job.setJobName("AvroMultipleOutputs");
  
      AvroJob.setInputSchema(job, Schema.create(Schema.Type.STRING));
      AvroJob.setOutputSchema(job, new Pair<Utf8, Long>(new Utf8(""), 0L).getSchema());
  
      AvroJob.setMapperClass(job, MapImpl.class);
      AvroJob.setReducerClass(job, ReduceImpl.class);
  
      FileInputFormat.setInputPaths(job, pathIn);
      FileOutputFormat.setOutputPath(job, outputPath);
      FileOutputFormat.setCompressOutput(job, false);
      AvroMultipleOutputs.addNamedOutput(job, "myavro", AvroOutputFormat.class,
          new Pair<Utf8, Long>(new Utf8(""), 0L).getSchema());
      AvroMultipleOutputs.addNamedOutput(job, "myavro1", AvroOutputFormat.class, Schema.create(Schema.Type.STRING));
      AvroMultipleOutputs.addNamedOutput(job, "myavro2", AvroOutputFormat.class, Schema.create(Schema.Type.STRING));
      WordCountUtil.setMeta(job);
  
      JobClient.runJob(job);
  
      WordCountUtil.validateCountsFile(new File(outputPath.toString(), "/part-00000.avro"));
    }
  
    @SuppressWarnings("deprecation")
    public void testProjection(String inputDirectory) throws Exception {
      JobConf job = new JobConf();
  
      Integer defaultRank = -1;
  
      String jsonSchema = "{\"type\":\"record\"," + "\"name\":\"org.apache.avro.mapred.Pair\"," + "\"fields\": [ "
          + "{\"name\":\"rank\", \"type\":\"int\", \"default\": -1}," + "{\"name\":\"value\", \"type\":\"long\"}" + "]}";
  
      Schema readerSchema = Schema.parse(jsonSchema);
  
      AvroJob.setInputSchema(job, readerSchema);
  
      Path inputPath = new Path(inputDirectory + "/myavro-r-00000.avro");
      FileStatus fileStatus = FileSystem.get(job).getFileStatus(inputPath);
      FileSplit fileSplit = new FileSplit(inputPath, 0, fileStatus.getLen(), job);
  
      AvroRecordReader<Pair<Integer, Long>> recordReader = new AvroRecordReader<>(job, fileSplit);
  
      AvroWrapper<Pair<Integer, Long>> inputPair = new AvroWrapper<>(null);
      NullWritable ignore = NullWritable.get();
  
      long sumOfCounts = 0;
      long numOfCounts = 0;
      while (recordReader.next(inputPair, ignore)) {
        assertEquals(inputPair.datum().get(0), defaultRank);
        sumOfCounts += (Long) inputPair.datum().get(1);
        numOfCounts++;
      }
  
      assertEquals(numOfCounts, WordCountUtil.COUNTS.size());
  
      long actualSumOfCounts = 0;
      for (Long count : WordCountUtil.COUNTS.values()) {
        actualSumOfCounts += count;
      }
  
      assertEquals(sumOfCounts, actualSumOfCounts);
    }
  
    @SuppressWarnings("deprecation")
    public void testProjectionNewMethodsOne(String inputDirectory) throws Exception {
      JobConf job = new JobConf();
  
      Integer defaultRank = -1;
  
      String jsonSchema = "{\"type\":\"record\"," + "\"name\":\"org.apache.avro.mapred.Pair\"," + "\"fields\": [ "
          + "{\"name\":\"rank\", \"type\":\"int\", \"default\": -1}," + "{\"name\":\"value\", \"type\":\"long\"}" + "]}";
  
      Schema readerSchema = Schema.parse(jsonSchema);
  
      AvroJob.setInputSchema(job, readerSchema);
  
      Path inputPath = new Path(inputDirectory + "/testavrofile-r-00000.avro");
      FileStatus fileStatus = FileSystem.get(job).getFileStatus(inputPath);
      FileSplit fileSplit = new FileSplit(inputPath, 0, fileStatus.getLen(), job);
  
      AvroRecordReader<Pair<Integer, Long>> recordReader = new AvroRecordReader<>(job, fileSplit);
  
      AvroWrapper<Pair<Integer, Long>> inputPair = new AvroWrapper<>(null);
      NullWritable ignore = NullWritable.get();
  
      long sumOfCounts = 0;
      long numOfCounts = 0;
      while (recordReader.next(inputPair, ignore)) {
        assertEquals(inputPair.datum().get(0), defaultRank);
        sumOfCounts += (Long) inputPair.datum().get(1);
        numOfCounts++;
      }
  
      assertEquals(numOfCounts, WordCountUtil.COUNTS.size());
  
      long actualSumOfCounts = 0;
      for (Long count : WordCountUtil.COUNTS.values()) {
        actualSumOfCounts += count;
      }
  
      assertEquals(sumOfCounts, actualSumOfCounts);
  
    }
  
    @SuppressWarnings("deprecation")
    // Test for a different schema output
    public void testProjection1(String inputDirectory) throws Exception {
      JobConf job = new JobConf();
      Schema readerSchema = Schema.create(Schema.Type.STRING);
      AvroJob.setInputSchema(job, readerSchema);
  
      Path inputPath = new Path(inputDirectory + "/myavro1-r-00000.avro");
      FileStatus fileStatus = FileSystem.get(job).getFileStatus(inputPath);
      FileSplit fileSplit = new FileSplit(inputPath, 0, fileStatus.getLen(), job);
      AvroWrapper<Utf8> inputPair = new AvroWrapper<>(null);
      NullWritable ignore = NullWritable.get();
      AvroRecordReader<Utf8> recordReader = new AvroRecordReader<>(job, fileSplit);
      long sumOfCounts = 0;
      long numOfCounts = 0;
      while (recordReader.next(inputPair, ignore)) {
        sumOfCounts += Long.parseLong(inputPair.datum().toString().split(":")[2].replace("}", "").trim());
        numOfCounts++;
      }
      assertEquals(numOfCounts, WordCountUtil.COUNTS.size());
      long actualSumOfCounts = 0;
      for (Long count : WordCountUtil.COUNTS.values()) {
        actualSumOfCounts += count;
      }
      assertEquals(sumOfCounts, actualSumOfCounts);
    }
  
    @SuppressWarnings("deprecation")
    // Test for a different schema output
    public void testProjectionNewMethodsTwo(String inputDirectory) throws Exception {
      JobConf job = new JobConf();
      Schema readerSchema = Schema.create(Schema.Type.STRING);
      AvroJob.setInputSchema(job, readerSchema);
  
      Path inputPath = new Path(inputDirectory + "/testavrofile1-r-00000.avro");
      FileStatus fileStatus = FileSystem.get(job).getFileStatus(inputPath);
      FileSplit fileSplit = new FileSplit(inputPath, 0, fileStatus.getLen(), job);
      AvroWrapper<Utf8> inputPair = new AvroWrapper<>(null);
      NullWritable ignore = NullWritable.get();
      AvroRecordReader<Utf8> recordReader = new AvroRecordReader<>(job, fileSplit);
      long sumOfCounts = 0;
      long numOfCounts = 0;
      while (recordReader.next(inputPair, ignore)) {
        sumOfCounts += Long.parseLong(inputPair.datum().toString().split(":")[2].replace("}", "").trim());
        numOfCounts++;
      }
      assertEquals(numOfCounts, WordCountUtil.COUNTS.size());
      long actualSumOfCounts = 0;
      for (Long count : WordCountUtil.COUNTS.values()) {
        actualSumOfCounts += count;
      }
      assertEquals(sumOfCounts, actualSumOfCounts);
    }
  
    @SuppressWarnings("deprecation")
    public void testJobNoreducer() throws Exception {
      JobConf job = new JobConf();
      job.setNumReduceTasks(0);
  
      Path outputPath = new Path(OUTPUT_DIR.getPath());
      outputPath.getFileSystem(job).delete(outputPath, true);
  
      WordCountUtil.writeLinesFile(new File(INPUT_DIR, "lines.avro"));
  
      job.setJobName("AvroMultipleOutputs_noreducer");
  
      AvroJob.setInputSchema(job, Schema.create(Schema.Type.STRING));
      AvroJob.setOutputSchema(job, new Pair<Utf8, Long>(new Utf8(""), 0L).getSchema());
  
      AvroJob.setMapperClass(job, MapImpl.class);
  
      FileInputFormat.setInputPaths(job, new Path(INPUT_DIR.toString()));
      FileOutputFormat.setOutputPath(job, outputPath);
      FileOutputFormat.setCompressOutput(job, false);
      AvroMultipleOutputs.addNamedOutput(job, "myavro2", AvroOutputFormat.class, Schema.create(Schema.Type.STRING));
      JobClient.runJob(job);
    }
  
    public void testProjectionNoreducer(String inputDirectory) throws Exception {
      JobConf job = new JobConf();
      long onel = 1;
      Schema readerSchema = Schema.create(Schema.Type.STRING);
      AvroJob.setInputSchema(job, readerSchema);
      Path inputPath = new Path(inputDirectory + "/myavro2-m-00000.avro");
      FileStatus fileStatus = FileSystem.get(job).getFileStatus(inputPath);
      FileSplit fileSplit = new FileSplit(inputPath, 0, fileStatus.getLen(), (String[]) null);
      AvroRecordReader<Utf8> recordReader = new AvroRecordReader<>(job, fileSplit);
      AvroWrapper<Utf8> inputPair = new AvroWrapper<>(null);
      NullWritable ignore = NullWritable.get();
      while (recordReader.next(inputPair, ignore)) {
        long testl = Long.parseLong(inputPair.datum().toString().split(":")[2].replace("}", "").trim());
        assertEquals(onel, testl);
      }
    }
  }
  