/**
* 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 com.google.common.collect.ImmutableSet;
import com.google.common.collect.Sets;
import org.apache.crunch.MapFn;
import org.apache.crunch.Pair;
import org.apache.crunch.Pipeline;
import org.apache.crunch.impl.mr.MRPipeline;
import org.apache.crunch.io.From;
import org.apache.crunch.test.CrunchTestSupport;
import org.apache.crunch.types.avro.Avros;
import org.apache.hadoop.fs.FileStatus;
import org.apache.hadoop.fs.FileSystem;
import org.apache.hadoop.fs.Path;
import org.junit.Test;
import java.io.Serializable;
import java.util.Set;
import static org.junit.Assert.assertEquals;
public class AvroPathPerKeyIT extends CrunchTestSupport implements Serializable {
@Test
public void testOutputFilePerKey() throws Exception {
Pipeline p = new MRPipeline(AvroPathPerKeyIT.class, tempDir.getDefaultConfiguration());
Path outDir = tempDir.getPath("out");
p.read(From.textFile(tempDir.copyResourceFileName("docs.txt")))
.parallelDo(new MapFn<String, Pair<String, String>>() {
@Override
public Pair<String, String> map(String input) {
String[] p = input.split("\t");
return Pair.of(p[0], p[1]);
}
}, Avros.tableOf(Avros.strings(), Avros.strings()))
.groupByKey()
.write(new AvroPathPerKeyTarget(outDir));
p.done();
Set<String> names = Sets.newHashSet();
FileSystem fs = outDir.getFileSystem(tempDir.getDefaultConfiguration());
for (FileStatus fstat : fs.listStatus(outDir)) {
names.add(fstat.getPath().getName());
}
assertEquals(ImmutableSet.of("A", "B", "_SUCCESS"), names);
FileStatus[] aStat = fs.listStatus(new Path(outDir, "A"));
assertEquals(1, aStat.length);
assertEquals("part-r-00000.avro", aStat[0].getPath().getName());
FileStatus[] bStat = fs.listStatus(new Path(outDir, "B"));
assertEquals(1, bStat.length);
assertEquals("part-r-00000.avro", bStat[0].getPath().getName());
}
}