| /* |
| * 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.flink.test.hadoopcompatibility.mapred; |
| |
| import org.apache.flink.api.java.DataSet; |
| import org.apache.flink.api.java.ExecutionEnvironment; |
| import org.apache.flink.api.java.tuple.Tuple2; |
| import org.apache.flink.core.fs.FileSystem; |
| import org.apache.flink.hadoopcompatibility.mapred.HadoopMapFunction; |
| import org.apache.flink.test.util.MultipleProgramsTestBase; |
| import org.apache.flink.testutils.junit.extensions.parameterized.ParameterizedTestExtension; |
| |
| import org.apache.hadoop.io.IntWritable; |
| import org.apache.hadoop.io.Text; |
| import org.apache.hadoop.mapred.JobConf; |
| import org.apache.hadoop.mapred.Mapper; |
| import org.apache.hadoop.mapred.OutputCollector; |
| import org.apache.hadoop.mapred.Reporter; |
| import org.junit.jupiter.api.TestTemplate; |
| import org.junit.jupiter.api.extension.ExtendWith; |
| import org.junit.jupiter.api.io.TempDir; |
| |
| import java.io.IOException; |
| import java.nio.file.Path; |
| |
| import static org.apache.flink.test.util.TestBaseUtils.compareResultsByLinesInMemory; |
| |
| /** IT cases for the {@link HadoopMapFunction}. */ |
| @ExtendWith(ParameterizedTestExtension.class) |
| class HadoopMapFunctionITCase extends MultipleProgramsTestBase { |
| |
| @TestTemplate |
| void testNonPassingMapper(@TempDir Path tempFolder) throws Exception { |
| final ExecutionEnvironment env = ExecutionEnvironment.getExecutionEnvironment(); |
| |
| DataSet<Tuple2<IntWritable, Text>> ds = HadoopTestData.getKVPairDataSet(env); |
| DataSet<Tuple2<IntWritable, Text>> nonPassingFlatMapDs = |
| ds.flatMap( |
| new HadoopMapFunction<IntWritable, Text, IntWritable, Text>( |
| new NonPassingMapper())); |
| |
| String resultPath = tempFolder.toUri().toString(); |
| |
| nonPassingFlatMapDs.writeAsText(resultPath, FileSystem.WriteMode.OVERWRITE); |
| env.execute(); |
| |
| compareResultsByLinesInMemory("\n", resultPath); |
| } |
| |
| @TestTemplate |
| void testDataDuplicatingMapper(@TempDir Path tempFolder) throws Exception { |
| final ExecutionEnvironment env = ExecutionEnvironment.getExecutionEnvironment(); |
| |
| DataSet<Tuple2<IntWritable, Text>> ds = HadoopTestData.getKVPairDataSet(env); |
| DataSet<Tuple2<IntWritable, Text>> duplicatingFlatMapDs = |
| ds.flatMap( |
| new HadoopMapFunction<IntWritable, Text, IntWritable, Text>( |
| new DuplicatingMapper())); |
| |
| String resultPath = tempFolder.toUri().toString(); |
| |
| duplicatingFlatMapDs.writeAsText(resultPath, FileSystem.WriteMode.OVERWRITE); |
| env.execute(); |
| |
| String expected = |
| "(1,Hi)\n" |
| + "(1,HI)\n" |
| + "(2,Hello)\n" |
| + "(2,HELLO)\n" |
| + "(3,Hello world)\n" |
| + "(3,HELLO WORLD)\n" |
| + "(4,Hello world, how are you?)\n" |
| + "(4,HELLO WORLD, HOW ARE YOU?)\n" |
| + "(5,I am fine.)\n" |
| + "(5,I AM FINE.)\n" |
| + "(6,Luke Skywalker)\n" |
| + "(6,LUKE SKYWALKER)\n" |
| + "(7,Comment#1)\n" |
| + "(7,COMMENT#1)\n" |
| + "(8,Comment#2)\n" |
| + "(8,COMMENT#2)\n" |
| + "(9,Comment#3)\n" |
| + "(9,COMMENT#3)\n" |
| + "(10,Comment#4)\n" |
| + "(10,COMMENT#4)\n" |
| + "(11,Comment#5)\n" |
| + "(11,COMMENT#5)\n" |
| + "(12,Comment#6)\n" |
| + "(12,COMMENT#6)\n" |
| + "(13,Comment#7)\n" |
| + "(13,COMMENT#7)\n" |
| + "(14,Comment#8)\n" |
| + "(14,COMMENT#8)\n" |
| + "(15,Comment#9)\n" |
| + "(15,COMMENT#9)\n" |
| + "(16,Comment#10)\n" |
| + "(16,COMMENT#10)\n" |
| + "(17,Comment#11)\n" |
| + "(17,COMMENT#11)\n" |
| + "(18,Comment#12)\n" |
| + "(18,COMMENT#12)\n" |
| + "(19,Comment#13)\n" |
| + "(19,COMMENT#13)\n" |
| + "(20,Comment#14)\n" |
| + "(20,COMMENT#14)\n" |
| + "(21,Comment#15)\n" |
| + "(21,COMMENT#15)\n"; |
| |
| compareResultsByLinesInMemory(expected, resultPath); |
| } |
| |
| @TestTemplate |
| void testConfigurableMapper(@TempDir Path tempFolder) throws Exception { |
| final ExecutionEnvironment env = ExecutionEnvironment.getExecutionEnvironment(); |
| |
| JobConf conf = new JobConf(); |
| conf.set("my.filterPrefix", "Hello"); |
| |
| DataSet<Tuple2<IntWritable, Text>> ds = HadoopTestData.getKVPairDataSet(env); |
| DataSet<Tuple2<IntWritable, Text>> hellos = |
| ds.flatMap( |
| new HadoopMapFunction<IntWritable, Text, IntWritable, Text>( |
| new ConfigurableMapper(), conf)); |
| |
| String resultPath = tempFolder.toUri().toString(); |
| |
| hellos.writeAsText(resultPath, FileSystem.WriteMode.OVERWRITE); |
| env.execute(); |
| |
| String expected = "(2,Hello)\n" + "(3,Hello world)\n" + "(4,Hello world, how are you?)\n"; |
| |
| compareResultsByLinesInMemory(expected, resultPath); |
| } |
| |
| /** {@link Mapper} that only forwards records containing "bananas". */ |
| public static class NonPassingMapper implements Mapper<IntWritable, Text, IntWritable, Text> { |
| |
| @Override |
| public void map( |
| final IntWritable k, |
| final Text v, |
| final OutputCollector<IntWritable, Text> out, |
| final Reporter r) |
| throws IOException { |
| if (v.toString().contains("bananas")) { |
| out.collect(k, v); |
| } |
| } |
| |
| @Override |
| public void configure(final JobConf arg0) {} |
| |
| @Override |
| public void close() throws IOException {} |
| } |
| |
| /** {@link Mapper} that duplicates records. */ |
| public static class DuplicatingMapper implements Mapper<IntWritable, Text, IntWritable, Text> { |
| |
| @Override |
| public void map( |
| final IntWritable k, |
| final Text v, |
| final OutputCollector<IntWritable, Text> out, |
| final Reporter r) |
| throws IOException { |
| out.collect(k, v); |
| out.collect(k, new Text(v.toString().toUpperCase())); |
| } |
| |
| @Override |
| public void configure(final JobConf arg0) {} |
| |
| @Override |
| public void close() throws IOException {} |
| } |
| |
| /** {@link Mapper} that filters records based on a prefix. */ |
| public static class ConfigurableMapper implements Mapper<IntWritable, Text, IntWritable, Text> { |
| private String filterPrefix; |
| |
| @Override |
| public void map(IntWritable k, Text v, OutputCollector<IntWritable, Text> out, Reporter r) |
| throws IOException { |
| if (v.toString().startsWith(filterPrefix)) { |
| out.collect(k, v); |
| } |
| } |
| |
| @Override |
| public void configure(JobConf c) { |
| filterPrefix = c.get("my.filterPrefix"); |
| } |
| |
| @Override |
| public void close() throws IOException {} |
| } |
| } |