| /* |
| * 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.longrides.scala |
| |
| import org.apache.flink.configuration.Configuration |
| import org.apache.flink.streaming.api.TimeCharacteristic |
| import org.apache.flink.streaming.api.functions.KeyedProcessFunction |
| import org.apache.flink.streaming.api.scala.{StreamExecutionEnvironment, _} |
| import org.apache.flink.training.exercises.common.datatypes.TaxiRide |
| import org.apache.flink.training.exercises.common.sources.TaxiRideGenerator |
| import org.apache.flink.training.exercises.common.utils.ExerciseBase._ |
| import org.apache.flink.training.exercises.common.utils.{ExerciseBase, MissingSolutionException} |
| import org.apache.flink.util.Collector |
| |
| /** |
| * The "Long Ride Alerts" exercise of the Flink training in the docs. |
| * |
| * The goal for this exercise is to emit START events for taxi rides that have not been matched |
| * by an END event during the first 2 hours of the ride. |
| * |
| */ |
| object LongRidesExercise { |
| |
| def main(args: Array[String]) { |
| |
| // set up the execution environment |
| val env = StreamExecutionEnvironment.getExecutionEnvironment |
| env.setStreamTimeCharacteristic(TimeCharacteristic.EventTime) |
| env.setParallelism(ExerciseBase.parallelism) |
| |
| val rides = env.addSource(rideSourceOrTest(new TaxiRideGenerator())) |
| |
| val longRides = rides |
| .keyBy(_.rideId) |
| .process(new ImplementMeFunction()) |
| |
| printOrTest(longRides) |
| |
| env.execute("Long Taxi Rides") |
| } |
| |
| class ImplementMeFunction extends KeyedProcessFunction[Long, TaxiRide, TaxiRide] { |
| |
| override def open(parameters: Configuration): Unit = { |
| throw new MissingSolutionException() |
| } |
| |
| override def processElement(ride: TaxiRide, |
| context: KeyedProcessFunction[Long, TaxiRide, TaxiRide]#Context, |
| out: Collector[TaxiRide]): Unit = { |
| } |
| |
| override def onTimer(timestamp: Long, |
| ctx: KeyedProcessFunction[Long, TaxiRide, TaxiRide]#OnTimerContext, |
| out: Collector[TaxiRide]): Unit = { |
| } |
| |
| } |
| |
| } |