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// Copyright Yahoo. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
package com.yahoo.vespa.hadoop.pig;
import com.fasterxml.jackson.core.JsonEncoding;
import com.fasterxml.jackson.core.JsonFactory;
import com.fasterxml.jackson.core.JsonGenerator;
import com.yahoo.vespa.hadoop.mapreduce.VespaOutputFormat;
import com.yahoo.vespa.hadoop.mapreduce.util.VespaConfiguration;
import com.yahoo.vespa.hadoop.mapreduce.util.VespaCounters;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.fs.FSDataOutputStream;
import org.apache.hadoop.fs.FileSystem;
import org.apache.hadoop.fs.LocalFileSystem;
import org.apache.hadoop.fs.Path;
import org.apache.hadoop.hdfs.HdfsConfiguration;
import org.apache.hadoop.hdfs.MiniDFSCluster;
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.Reducer;
import org.apache.hadoop.mapreduce.lib.input.FileInputFormat;
import org.apache.hadoop.test.PathUtils;
import org.junit.jupiter.api.AfterAll;
import org.junit.jupiter.api.BeforeAll;
import org.junit.jupiter.api.Test;
import java.io.BufferedInputStream;
import java.io.ByteArrayOutputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.util.StringTokenizer;
import static org.junit.jupiter.api.Assertions.assertEquals;
import static org.junit.jupiter.api.Assertions.assertTrue;
public class MapReduceTest {
protected static File hdfsBaseDir;
protected static FileSystem hdfs;
protected static Configuration conf;
protected static MiniDFSCluster cluster;
protected static Path metricsJsonPath;
protected static Path metricsCsvPath;
@BeforeAll
public static void setUp() throws IOException {
hdfsBaseDir = new File(PathUtils.getTestDir(MapReduceTest.class).getCanonicalPath());
conf = new HdfsConfiguration();
conf.set(MiniDFSCluster.HDFS_MINIDFS_BASEDIR, hdfsBaseDir.getAbsolutePath());
conf.set(VespaConfiguration.DRYRUN, "true");
conf.set(VespaConfiguration.ENDPOINT, "endpoint-does-not-matter-in-dryrun");
cluster = new MiniDFSCluster.Builder(conf).build();
hdfs = FileSystem.get(conf);
metricsJsonPath = new Path("metrics_json");
metricsCsvPath = new Path("metrics_csv");
copyToHdfs("src/test/resources/operations_data.json", metricsJsonPath, "data");
copyToHdfs("src/test/resources/tabular_data.csv", metricsCsvPath, "data");
}
@AfterAll
public static void tearDown() throws IOException {
Path testDir = new Path(hdfsBaseDir.getParent());
hdfs.delete(testDir, true);
cluster.shutdown();
LocalFileSystem localFileSystem = FileSystem.getLocal(conf);
localFileSystem.delete(testDir, true);
}
@Test
public void requireThatMapOnlyJobSucceeds() throws Exception {
Job job = Job.getInstance(conf);
job.setJarByClass(MapReduceTest.class);
job.setMapperClass(FeedMapper.class);
job.setOutputFormatClass(VespaOutputFormat.class);
job.setMapOutputValueClass(Text.class);
FileInputFormat.setInputPaths(job, metricsJsonPath);
boolean success = job.waitForCompletion(true);
assertTrue(success, "Job Failed");
VespaCounters counters = VespaCounters.get(job);
assertEquals(10, counters.getDocumentsSent());
assertEquals(0, counters.getDocumentsFailed());
assertEquals(10, counters.getDocumentsOk());
}
@Test
public void requireThatMapReduceJobSucceeds() throws Exception {
Job job = Job.getInstance(conf);
job.setJarByClass(MapReduceTest.class);
job.setMapperClass(FeedMapper.class);
job.setOutputFormatClass(VespaOutputFormat.class);
job.setMapOutputValueClass(Text.class);
job.setReducerClass(FeedReducer.class);
job.setNumReduceTasks(1);
FileInputFormat.setInputPaths(job, metricsJsonPath);
boolean success = job.waitForCompletion(true);
assertTrue(success, "Job Failed");
VespaCounters counters = VespaCounters.get(job);
assertEquals(10, counters.getDocumentsSent());
assertEquals(0, counters.getDocumentsFailed());
assertEquals(10, counters.getDocumentsOk());
}
@Test
public void requireThatTransformMapJobSucceeds() throws Exception {
Job job = Job.getInstance(conf);
job.setJarByClass(MapReduceTest.class);
job.setMapperClass(ParsingMapper.class);
job.setOutputFormatClass(VespaOutputFormat.class);
job.setMapOutputValueClass(Text.class);
job.setReducerClass(FeedReducer.class);
job.setNumReduceTasks(1);
FileInputFormat.setInputPaths(job, metricsCsvPath);
boolean success = job.waitForCompletion(true);
assertTrue(success, "Job Failed");
VespaCounters counters = VespaCounters.get(job);
assertEquals(10, counters.getDocumentsSent());
assertEquals(0, counters.getDocumentsFailed());
assertEquals(10, counters.getDocumentsOk());
assertEquals(0, counters.getDocumentsSkipped());
}
private static void copyToHdfs(String localFile, Path hdfsDir, String hdfsName) throws IOException {
Path hdfsPath = new Path(hdfsDir, hdfsName);
FSDataOutputStream out = hdfs.create(hdfsPath);
try (InputStream in = new BufferedInputStream(new FileInputStream(localFile))) {
int len;
byte[] buffer = new byte[1024];
while ((len = in.read(buffer)) > 0) {
out.write(buffer, 0, len);
}
} finally {
out.close();
}
}
public static class FeedMapper extends Mapper<LongWritable, Text, LongWritable, Text> {
public void map(LongWritable key, Text value, Context context) throws IOException, InterruptedException {
context.write(key, value);
}
}
public static class FeedReducer extends Reducer<Object, Text, LongWritable, Text> {
public void reduce(LongWritable key, Text value, Context context) throws IOException, InterruptedException {
context.write(key, value);
}
}
public static class ParsingMapper extends Mapper<LongWritable, Text, LongWritable, Text> {
public void map(LongWritable key, Text value, Context context) throws IOException, InterruptedException {
String line = value.toString();
if (line == null || line.length() == 0)
return;
StringTokenizer tokenizer = new StringTokenizer(line);
long date = Long.parseLong(tokenizer.nextToken());
String metricName = tokenizer.nextToken();
long metricValue = Long.parseLong(tokenizer.nextToken());
String application = tokenizer.nextToken();
String docid = "id:"+application+":metric::"+metricName+"-"+date;
ByteArrayOutputStream out = new ByteArrayOutputStream();
JsonGenerator g = new JsonFactory().createGenerator(out, JsonEncoding.UTF8);
g.writeStartObject();
g.writeObjectFieldStart("fields");
g.writeNumberField("date", date);
g.writeStringField("name", metricName);
g.writeNumberField("value", metricValue);
g.writeStringField("application", application);
g.writeEndObject();
g.writeStringField("put", docid);
g.writeEndObject();
g.close();
context.write(key, new Text(out.toString()));
}
}
}
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