/**
* 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.lib;
import static org.junit.Assert.assertEquals;
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.Serializable;
import java.util.List;
import org.apache.avro.file.DataFileWriter;
import org.apache.avro.specific.SpecificDatumWriter;
import org.apache.crunch.MapFn;
import org.apache.crunch.PCollection;
import org.apache.crunch.PTable;
import org.apache.crunch.Pair;
import org.apache.crunch.impl.mr.MRPipeline;
import org.apache.crunch.io.At;
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.junit.After;
import org.junit.Before;
import org.junit.Rule;
import org.junit.Test;
import com.google.common.collect.Lists;
/**
* Test {@link org.apache.crunch.types.avro.SafeAvroSerialization} with Specific Avro types
*/
public class SpecificAvroGroupByIT implements Serializable {
private static final long serialVersionUID = 1344118240353796561L;
private transient File avroFile;
@Rule
public transient TemporaryPath tmpDir = TemporaryPaths.create();
@Before
public void setUp() throws IOException {
avroFile = File.createTempFile("avrotest", ".avro");
}
@After
public void tearDown() {
avroFile.delete();
}
@Test
public void testGrouByWithSpecificAvroType() throws Exception {
MRPipeline pipeline = new MRPipeline(SpecificAvroGroupByIT.class, tmpDir.getDefaultConfiguration());
testSpecificAvro(pipeline);
}
public void testSpecificAvro(MRPipeline pipeline) throws Exception {
createPersonAvroFile(avroFile);
PCollection<Person> unsorted = pipeline.read(At.avroFile(avroFile.getAbsolutePath(), Avros.records(Person.class)));
PTable<String, Person> sorted = unsorted.parallelDo(new MapFn<Person, Pair<String, Person>>() {
@Override
public Pair<String, Person> map(Person input) {
String key = input.name.toString();
return Pair.of(key, input);
}
}, Avros.tableOf(Avros.strings(), Avros.records(Person.class))).groupByKey().ungroup();
List<Pair<String, Person>> outputPersonList = Lists.newArrayList(sorted.materialize());
assertEquals(1, outputPersonList.size());
assertEquals(String.class, outputPersonList.get(0).first().getClass());
assertEquals(Person.class, outputPersonList.get(0).second().getClass());
pipeline.done();
}
private static void createPersonAvroFile(File avroFile) throws IOException {
Person person = new Person();
person.age = 40;
person.name = "Bob";
List<CharSequence> siblingNames = Lists.newArrayList();
siblingNames.add("Bob1");
siblingNames.add("Bob2");
person.siblingnames = siblingNames;
FileOutputStream outputStream = new FileOutputStream(avroFile);
SpecificDatumWriter<Person> writer = new SpecificDatumWriter<Person>(Person.class);
DataFileWriter<Person> dataFileWriter = new DataFileWriter<Person>(writer);
dataFileWriter.create(Person.SCHEMA$, outputStream);
dataFileWriter.append(person);
dataFileWriter.close();
outputStream.close();
}
}