/**
* 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.crunch.io.parquet;
import com.google.common.collect.Lists;
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.Serializable;
import java.util.List;
import org.apache.avro.Schema;
import org.apache.avro.file.DataFileWriter;
import org.apache.avro.generic.GenericData;
import org.apache.avro.generic.GenericDatumWriter;
import org.apache.avro.generic.GenericRecord;
import org.apache.crunch.DoFn;
import org.apache.crunch.Emitter;
import org.apache.crunch.PCollection;
import org.apache.crunch.Pipeline;
import org.apache.crunch.Target;
import org.apache.crunch.impl.mr.MRPipeline;
import org.apache.crunch.io.At;
import org.apache.crunch.test.Employee;
import org.apache.crunch.test.Person;
import org.apache.crunch.test.TemporaryPath;
import org.apache.crunch.test.TemporaryPaths;
import org.apache.crunch.types.avro.Avros;
import org.apache.hadoop.fs.Path;
import org.junit.Before;
import org.junit.Rule;
import org.junit.Test;
import parquet.avro.AvroParquetReader;
import parquet.avro.AvroParquetWriter;
import static org.hamcrest.core.Is.is;
import static org.junit.Assert.assertThat;
public class AvroParquetPipelineIT implements Serializable {
private transient File avroFile;
@Rule
public transient TemporaryPath tmpDir = TemporaryPaths.create();
@Before
public void setUp() throws IOException {
avroFile = tmpDir.getFile("test.avro.parquet");
}
private void populateGenericFile(List<GenericRecord> genericRecords, Schema schema) throws IOException {
FileOutputStream outputStream = new FileOutputStream(this.avroFile);
GenericDatumWriter<GenericRecord> genericDatumWriter = new GenericDatumWriter<GenericRecord>(schema);
DataFileWriter<GenericRecord> dataFileWriter = new DataFileWriter<GenericRecord>(genericDatumWriter);
dataFileWriter.create(schema, outputStream);
for (GenericRecord record : genericRecords) {
dataFileWriter.append(record);
}
dataFileWriter.close();
outputStream.close();
}
private void populateGenericParquetFile(List<GenericRecord> genericRecords, Schema schema) throws IOException {
AvroParquetWriter<GenericRecord> writer = new AvroParquetWriter<GenericRecord>(
new Path(avroFile.getPath()), schema);
for (GenericRecord record : genericRecords) {
writer.write(record);
}
writer.close();
}
@Test
public void toAvroParquetFileTarget() throws Exception {
GenericRecord savedRecord = new GenericData.Record(Person.SCHEMA$);
savedRecord.put("name", "John Doe");
savedRecord.put("age", 42);
savedRecord.put("siblingnames", Lists.newArrayList("Jimmy", "Jane"));
populateGenericFile(Lists.newArrayList(savedRecord), Person.SCHEMA$);
Pipeline pipeline = new MRPipeline(AvroParquetPipelineIT.class, tmpDir.getDefaultConfiguration());
PCollection<Person> genericCollection = pipeline.read(At.avroFile(avroFile.getAbsolutePath(),
Avros.records(Person.class)));
File outputFile = tmpDir.getFile("output");
Target parquetFileTarget = new AvroParquetFileTarget(outputFile.getAbsolutePath());
pipeline.write(genericCollection, parquetFileTarget);
pipeline.run();
Person person = genericCollection.materialize().iterator().next();
Path parquetFile = new Path(new File(outputFile, "part-m-00000.parquet").getPath());
AvroParquetReader<Person> reader = new AvroParquetReader<Person>(parquetFile);
try {
Person readPerson = reader.read();
assertThat(readPerson, is(person));
} finally {
reader.close();
}
}
@Test
public void toAvroParquetFileTargetFromParquet() throws Exception {
GenericRecord savedRecord = new GenericData.Record(Person.SCHEMA$);
savedRecord.put("name", "John Doe");
savedRecord.put("age", 42);
savedRecord.put("siblingnames", Lists.newArrayList("Jimmy", "Jane"));
populateGenericParquetFile(Lists.newArrayList(savedRecord), Person.SCHEMA$);
Pipeline pipeline = new MRPipeline(AvroParquetPipelineIT.class, tmpDir.getDefaultConfiguration());
PCollection<Person> genericCollection = pipeline.read(
new AvroParquetFileSource<Person>(new Path(avroFile.getAbsolutePath()), Avros.records(Person.class)));
File outputFile = tmpDir.getFile("output");
Target parquetFileTarget = new AvroParquetFileTarget(outputFile.getAbsolutePath());
pipeline.write(genericCollection, parquetFileTarget);
pipeline.run();
Person person = genericCollection.materialize().iterator().next();
Path parquetFile = new Path(new File(outputFile, "part-m-00000.parquet").getPath());
AvroParquetReader<Person> reader = new AvroParquetReader<Person>(parquetFile);
try {
Person readPerson = reader.read();
assertThat(readPerson, is(person));
} finally {
reader.close();
}
}
@Test
public void toAvroParquetFileMultipleTarget() throws Exception {
GenericRecord savedRecord = new GenericData.Record(Person.SCHEMA$);
savedRecord.put("name", "John Doe");
savedRecord.put("age", 42);
savedRecord.put("siblingnames", Lists.newArrayList("Jimmy", "Jane"));
populateGenericFile(Lists.newArrayList(savedRecord), Person.SCHEMA$);
Pipeline pipeline = new MRPipeline(AvroParquetPipelineIT.class, tmpDir.getDefaultConfiguration());
PCollection<Person> genericCollection = pipeline.read(At.avroFile(avroFile.getAbsolutePath(),
Avros.records(Person.class)));
PCollection<Employee> employees = genericCollection.parallelDo(new DoFn<Person, Employee>() {
@Override
public void process(Person person, Emitter<Employee> emitter) {
emitter.emit(new Employee(person.getName(), 0, "Eng"));
}
}, Avros.records(Employee.class));
File output1File = tmpDir.getFile("output1");
File output2File = tmpDir.getFile("output2");
pipeline.write(genericCollection, new AvroParquetFileTarget(output1File.getAbsolutePath()));
pipeline.write(employees, new AvroParquetFileSourceTarget(new Path(output2File.getAbsolutePath()),
Avros.records(Employee.class)));
pipeline.run();
Person person = genericCollection.materialize().iterator().next();
Employee employee = employees.materialize().iterator().next();
Path parquet1File = new Path(new File(output1File, "part-m-00000.parquet").getPath());
Path parquet2File = new Path(new File(output2File, "part-m-00000.parquet").getPath());
AvroParquetReader<Person> personReader = new AvroParquetReader<Person>(parquet1File);
try {
Person readPerson = personReader.read();
assertThat(readPerson, is(person));
} finally {
personReader.close();
}
AvroParquetReader<Employee> employeeReader = new AvroParquetReader<Employee>(parquet2File);
try {
Employee readEmployee = employeeReader.read();
assertThat(readEmployee, is(employee));
} finally {
employeeReader.close();
}
}
@Test
public void toAvroParquetFileTargetReadSource() throws Exception {
GenericRecord savedRecord = new GenericData.Record(Person.SCHEMA$);
savedRecord.put("name", "John Doe");
savedRecord.put("age", 42);
savedRecord.put("siblingnames", Lists.newArrayList("Jimmy", "Jane"));
populateGenericFile(Lists.newArrayList(savedRecord), Person.SCHEMA$);
Pipeline pipeline = new MRPipeline(AvroParquetPipelineIT.class, tmpDir.getDefaultConfiguration());
PCollection<Person> genericCollection = pipeline.read(At.avroFile(avroFile.getAbsolutePath(),
Avros.records(Person.class)));
File outputFile = tmpDir.getFile("output");
Target parquetFileTarget = new AvroParquetFileTarget(outputFile.getAbsolutePath());
pipeline.write(genericCollection, parquetFileTarget);
pipeline.run();
Person person = genericCollection.materialize().iterator().next();
PCollection<Person> retrievedPeople = pipeline.read(new AvroParquetFileSource<Person>(
new Path(outputFile.toURI()), Avros.records(Person.class)));
Person retrievedPerson = retrievedPeople.materialize().iterator().next();
assertThat(retrievedPerson, is(person));
Path parquetFile = new Path(new File(outputFile, "part-m-00000.parquet").getPath());
AvroParquetReader<Person> reader = new AvroParquetReader<Person>(parquetFile);
try {
Person readPerson = reader.read();
assertThat(readPerson, is(person));
} finally {
reader.close();
}
}
}