/**
* 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 com.google.common.base.Splitter;
import org.apache.crunch.impl.mr.MRPipeline;
import org.apache.crunch.lib.join.BloomFilterJoinStrategy;
import org.apache.crunch.lib.join.JoinType;
import org.apache.crunch.test.TemporaryPath;
import org.apache.crunch.test.TemporaryPaths;
import org.junit.Rule;
import org.junit.Test;
import java.io.Serializable;
import java.util.Iterator;
import static org.apache.crunch.types.avro.Avros.strings;
import static org.apache.crunch.types.avro.Avros.tableOf;
import static org.junit.Assert.assertTrue;
public class MultiStagePlanningIT implements Serializable {
@Rule
public transient TemporaryPath tmpDir = TemporaryPaths.create();
@Test
public void testMultiStagePlanning() throws Exception {
Pipeline pipeline = new MRPipeline(MRPipelineIT.class, tmpDir.getDefaultConfiguration());
String customersFile = tmpDir.copyResourceFileName("customers.txt");
String ordersFile = tmpDir.copyResourceFileName("orders.txt");
String addressesFile = tmpDir.copyResourceFileName("addresses.txt");
PTable<String, String> customersTable = pipeline.readTextFile(customersFile)
.parallelDo("Split customers", new StringToPairMapFn(), tableOf(strings(), strings()));
PTable<String, String> ordersTable = pipeline.readTextFile(ordersFile)
.parallelDo("Split orders", new StringToPairMapFn(), tableOf(strings(), strings()));
PTable<String, String> assignedOrders = new BloomFilterJoinStrategy<String, String, String>(5)
.join(customersTable, ordersTable, JoinType.INNER_JOIN)
.parallelDo(new MapFn<Pair<String, Pair<String, String>>, Pair<String, String>>() {
@Override
public Pair<String, String> map(Pair<String, Pair<String, String>> input) {
return Pair.of(input.first(), input.second().second());
}
}, tableOf(strings(), strings()));
PTable<String, String> addressesTable = pipeline.readTextFile(addressesFile)
.parallelDo("Split addresses", new StringToPairMapFn(), tableOf(strings(), strings()))
.filter(new FilterFn<Pair<String, String>>() {
@Override
public boolean accept(Pair<String, String> input) {
// This is odd but it is the simpler way of simulating this would take longer than
// the other branch with the Bloom Filter ...
try {
Thread.sleep(1000);
} catch (InterruptedException e) {
e.printStackTrace();
}
return true;
}
});
addressesTable.materialize();
PTable<String, Pair<String, String>> orderAddresses = assignedOrders.join(addressesTable);
orderAddresses.materialize();
PipelineResult result = pipeline.run();
assertTrue(result != null && result.succeeded());
}
private static class StringToPairMapFn extends MapFn<String, Pair<String, String>> {
private transient Splitter splitter;
@Override
public void initialize() {
super.initialize();
splitter = Splitter.on('|');
}
@Override
public Pair<String, String> map(String input) {
Iterator<String> split = splitter.split(input).iterator();
return Pair.of(split.next(), split.next());
}
}
}