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* 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.
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package org.apache.crunch.io.avro;
import static org.junit.Assert.assertEquals;
import java.io.IOException;
import java.io.Serializable;
import java.util.Collections;
import java.util.List;
import org.apache.crunch.MapFn;
import org.apache.crunch.PCollection;
import org.apache.crunch.Pair;
import org.apache.crunch.Pipeline;
import org.apache.crunch.impl.mr.MRPipeline;
import org.apache.crunch.lib.Aggregate;
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.Assume;
import org.junit.Rule;
import org.junit.Test;
import com.google.common.collect.Lists;
public class AvroReflectIT implements Serializable {
@Rule
public transient TemporaryPath tmpDir = TemporaryPaths.create();
@Test
public void testReflection() throws IOException {
Pipeline pipeline = new MRPipeline(AvroReflectIT.class, tmpDir.getDefaultConfiguration());
PCollection<StringWrapper> stringWrapperCollection = pipeline.readTextFile(tmpDir.copyResourceFileName("set1.txt"))
.parallelDo(new MapFn<String, StringWrapper>() {
@Override
public StringWrapper map(String input) {
StringWrapper stringWrapper = new StringWrapper();
stringWrapper.setValue(input);
return stringWrapper;
}
}, Avros.reflects(StringWrapper.class));
List<StringWrapper> stringWrappers = Lists.newArrayList(stringWrapperCollection.materialize());
pipeline.done();
assertEquals(Lists.newArrayList(new StringWrapper("b"), new StringWrapper("c"), new StringWrapper("a"),
new StringWrapper("e")), stringWrappers);
}
// Verify that running with a combination of reflect and specific schema
// doesn't crash
@Test
public void testCombinationOfReflectionAndSpecific() throws IOException {
Assume.assumeTrue(Avros.CAN_COMBINE_SPECIFIC_AND_REFLECT_SCHEMAS);
Pipeline pipeline = new MRPipeline(AvroReflectIT.class, tmpDir.getDefaultConfiguration());
PCollection<Pair<StringWrapper, Person>> hybridPairCollection = pipeline.readTextFile(
tmpDir.copyResourceFileName("set1.txt")).parallelDo(new MapFn<String, Pair<StringWrapper, Person>>() {
@Override
public Pair<StringWrapper, Person> map(String input) {
Person person = new Person();
person.name = input;
person.age = 42;
person.siblingnames = Lists.<CharSequence> newArrayList(input);
return Pair.of(new StringWrapper(input), person);
}
}, Avros.pairs(Avros.reflects(StringWrapper.class), Avros.records(Person.class)));
PCollection<Pair<String, Long>> countCollection = Aggregate.count(hybridPairCollection).parallelDo(
new MapFn<Pair<Pair<StringWrapper, Person>, Long>, Pair<String, Long>>() {
@Override
public Pair<String, Long> map(Pair<Pair<StringWrapper, Person>, Long> input) {
return Pair.of(input.first().first().getValue(), input.second());
}
}, Avros.pairs(Avros.strings(), Avros.longs()));
List<Pair<String, Long>> materialized = Lists.newArrayList(countCollection.materialize());
List<Pair<String, Long>> expected = Lists.newArrayList(Pair.of("a", 1L), Pair.of("b", 1L), Pair.of("c", 1L),
Pair.of("e", 1L));
Collections.sort(materialized);
assertEquals(expected, materialized);
pipeline.done();
}
}