/**
* 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.avro;
import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertTrue;
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.commons.io.FileUtils;
import org.apache.crunch.MapFn;
import org.apache.crunch.PCollection;
import org.apache.crunch.PTable;
import org.apache.crunch.Pair;
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.io.To;
import org.apache.crunch.test.Person;
import org.apache.crunch.test.StringWrapper;
import org.apache.crunch.test.TemporaryPath;
import org.apache.crunch.test.TemporaryPaths;
import org.apache.crunch.types.avro.Avros;
import org.junit.Before;
import org.junit.Rule;
import org.junit.Test;
import com.google.common.collect.Lists;
public class AvroPipelineIT implements Serializable {
private transient File avroFile;
@Rule
public transient TemporaryPath tmpDir = TemporaryPaths.create();
@Before
public void setUp() throws IOException {
avroFile = tmpDir.getFile("test.avro");
}
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();
}
@Test
public void toTextShouldWriteAvroDataAsDatumText() 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(AvroFileSourceTargetIT.class, tmpDir.getDefaultConfiguration());
PCollection<Person> genericCollection = pipeline.read(At.avroFile(avroFile.getAbsolutePath(),
Avros.records(Person.class)));
File outputFile = tmpDir.getFile("output");
Target textFile = To.textFile(outputFile.getAbsolutePath());
pipeline.write(genericCollection, textFile);
pipeline.run();
Person person = genericCollection.materialize().iterator().next();
String outputString = FileUtils.readFileToString(new File(outputFile, "part-m-00000"));
assertTrue(outputString.contains(person.toString()));
}
@Test
public void genericWithReflection() 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(AvroFileSourceTargetIT.class, tmpDir.getDefaultConfiguration());
PCollection<Person> genericCollection = pipeline.read(At.avroFile(avroFile.getAbsolutePath(),
Avros.records(Person.class)));
PTable<Long, StringWrapper> pt = genericCollection.parallelDo(new MapFn<Person, Pair<Long, StringWrapper>>() {
@Override
public Pair<Long, StringWrapper> map(Person input) {
return Pair.of(1L, new StringWrapper(input.getName().toString()));
}
}, Avros.tableOf(Avros.longs(), Avros.reflects(StringWrapper.class)))
.groupByKey()
.ungroup();
List<Pair<Long, StringWrapper>> ret = Lists.newArrayList(pt.materialize());
pipeline.done();
assertEquals(1, ret.size());
}
}