/**
* 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;
import static junit.framework.Assert.assertEquals;
import static junit.framework.Assert.assertTrue;
import java.io.IOException;
import java.util.List;
import com.google.common.collect.Iterables;
import org.apache.crunch.fn.FilterFns;
import org.apache.crunch.impl.mem.MemPipeline;
import org.apache.crunch.impl.mr.MRPipeline;
import org.apache.crunch.materialize.MaterializableIterable;
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.PTypeFamily;
import org.apache.crunch.types.avro.AvroTypeFamily;
import org.apache.crunch.types.avro.Avros;
import org.apache.crunch.types.writable.WritableTypeFamily;
import org.junit.Assume;
import org.junit.Rule;
import org.junit.Test;
import com.google.common.collect.Lists;
public class MaterializeIT {
@Rule
public TemporaryPath tmpDir = TemporaryPaths.create();
@Test
public void testMaterializeInput_Writables() throws IOException {
runMaterializeInput(new MRPipeline(MaterializeIT.class, tmpDir.getDefaultConfiguration()),
WritableTypeFamily.getInstance());
}
@Test
public void testMaterializeInput_Avro() throws IOException {
runMaterializeInput(new MRPipeline(MaterializeIT.class, tmpDir.getDefaultConfiguration()),
AvroTypeFamily.getInstance());
}
@Test
public void testMaterializeInput_InMemoryWritables() throws IOException {
runMaterializeInput(MemPipeline.getInstance(), WritableTypeFamily.getInstance());
}
@Test
public void testMaterializeInput_InMemoryAvro() throws IOException {
runMaterializeInput(MemPipeline.getInstance(), AvroTypeFamily.getInstance());
}
@Test
public void testMaterializeEmptyIntermediate_Writables() throws IOException {
runMaterializeEmptyIntermediate(
new MRPipeline(MaterializeIT.class, tmpDir.getDefaultConfiguration()),
WritableTypeFamily.getInstance());
}
@Test
public void testMaterializeEmptyIntermediate_Avro() throws IOException {
runMaterializeEmptyIntermediate(
new MRPipeline(MaterializeIT.class, tmpDir.getDefaultConfiguration()),
AvroTypeFamily.getInstance());
}
@Test
public void testMaterializeEmptyIntermediate_InMemoryWritables() throws IOException {
runMaterializeEmptyIntermediate(MemPipeline.getInstance(), WritableTypeFamily.getInstance());
}
@Test
public void testMaterializeEmptyIntermediate_InMemoryAvro() throws IOException {
runMaterializeEmptyIntermediate(MemPipeline.getInstance(), AvroTypeFamily.getInstance());
}
public void runMaterializeInput(Pipeline pipeline, PTypeFamily typeFamily) throws IOException {
List<String> expectedContent = Lists.newArrayList("b", "c", "a", "e");
String inputPath = tmpDir.copyResourceFileName("set1.txt");
PCollection<String> lines = pipeline.readTextFile(inputPath);
assertEquals(expectedContent, Lists.newArrayList(lines.materialize()));
pipeline.done();
}
public void runMaterializeEmptyIntermediate(Pipeline pipeline, PTypeFamily typeFamily)
throws IOException {
String inputPath = tmpDir.copyResourceFileName("set1.txt");
PCollection<String> empty = pipeline.readTextFile(inputPath).filter(FilterFns.<String>REJECT_ALL());
assertTrue(Iterables.isEmpty(empty.materialize()));
pipeline.done();
}
static class StringToStringWrapperPersonPairMapFn extends 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();
return Pair.of(new StringWrapper(input), person);
}
}
@Test
public void testMaterializeAvroPersonAndReflectsPair_GroupedTable() throws IOException {
Assume.assumeTrue(Avros.CAN_COMBINE_SPECIFIC_AND_REFLECT_SCHEMAS);
Pipeline pipeline = new MRPipeline(MaterializeIT.class);
MaterializableIterable<Pair<StringWrapper, Person>> mi = (MaterializableIterable) pipeline
.readTextFile(tmpDir.copyResourceFileName("set1.txt"))
.parallelDo(new StringToStringWrapperPersonPairMapFn(),
Avros.pairs(Avros.reflects(StringWrapper.class), Avros.records(Person.class)))
.materialize();
// We just need to make sure this doesn't crash
assertEquals(4, Iterables.size(mi));
assertTrue(mi.getPipelineResult().succeeded());
}
}