| /* |
| * 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.training.exercises.ridesandfares; |
| |
| import org.apache.flink.api.common.JobExecutionResult; |
| import org.apache.flink.configuration.Configuration; |
| import org.apache.flink.streaming.api.datastream.DataStream; |
| import org.apache.flink.streaming.api.environment.StreamExecutionEnvironment; |
| import org.apache.flink.streaming.api.functions.co.RichCoFlatMapFunction; |
| import org.apache.flink.streaming.api.functions.sink.PrintSinkFunction; |
| import org.apache.flink.streaming.api.functions.sink.SinkFunction; |
| import org.apache.flink.streaming.api.functions.source.SourceFunction; |
| import org.apache.flink.training.exercises.common.datatypes.RideAndFare; |
| import org.apache.flink.training.exercises.common.datatypes.TaxiFare; |
| import org.apache.flink.training.exercises.common.datatypes.TaxiRide; |
| import org.apache.flink.training.exercises.common.sources.TaxiFareGenerator; |
| import org.apache.flink.training.exercises.common.sources.TaxiRideGenerator; |
| import org.apache.flink.training.exercises.common.utils.MissingSolutionException; |
| import org.apache.flink.util.Collector; |
| |
| /** |
| * The Stateful Enrichment exercise from the Flink training. |
| * |
| * <p>The goal for this exercise is to enrich TaxiRides with fare information. |
| */ |
| public class RidesAndFaresExercise { |
| |
| private final SourceFunction<TaxiRide> rideSource; |
| private final SourceFunction<TaxiFare> fareSource; |
| private final SinkFunction<RideAndFare> sink; |
| |
| /** Creates a job using the sources and sink provided. */ |
| public RidesAndFaresExercise( |
| SourceFunction<TaxiRide> rideSource, |
| SourceFunction<TaxiFare> fareSource, |
| SinkFunction<RideAndFare> sink) { |
| |
| this.rideSource = rideSource; |
| this.fareSource = fareSource; |
| this.sink = sink; |
| } |
| |
| /** |
| * Creates and executes the pipeline using the StreamExecutionEnvironment provided. |
| * |
| * @throws Exception which occurs during job execution. |
| * @return {JobExecutionResult} |
| */ |
| public JobExecutionResult execute() throws Exception { |
| |
| StreamExecutionEnvironment env = StreamExecutionEnvironment.getExecutionEnvironment(); |
| |
| // A stream of taxi ride START events, keyed by rideId. |
| DataStream<TaxiRide> rides = |
| env.addSource(rideSource).filter(ride -> ride.isStart).keyBy(ride -> ride.rideId); |
| |
| // A stream of taxi fare events, also keyed by rideId. |
| DataStream<TaxiFare> fares = env.addSource(fareSource).keyBy(fare -> fare.rideId); |
| |
| // Create the pipeline. |
| rides.connect(fares).flatMap(new EnrichmentFunction()).addSink(sink); |
| |
| // Execute the pipeline and return the result. |
| return env.execute("Join Rides with Fares"); |
| } |
| |
| /** |
| * Main method. |
| * |
| * @throws Exception which occurs during job execution. |
| */ |
| public static void main(String[] args) throws Exception { |
| |
| RidesAndFaresExercise job = |
| new RidesAndFaresExercise( |
| new TaxiRideGenerator(), |
| new TaxiFareGenerator(), |
| new PrintSinkFunction<>()); |
| |
| job.execute(); |
| } |
| |
| public static class EnrichmentFunction |
| extends RichCoFlatMapFunction<TaxiRide, TaxiFare, RideAndFare> { |
| |
| @Override |
| public void open(Configuration config) throws Exception { |
| throw new MissingSolutionException(); |
| } |
| |
| @Override |
| public void flatMap1(TaxiRide ride, Collector<RideAndFare> out) throws Exception { |
| throw new MissingSolutionException(); |
| } |
| |
| @Override |
| public void flatMap2(TaxiFare fare, Collector<RideAndFare> out) throws Exception { |
| throw new MissingSolutionException(); |
| } |
| } |
| } |