| /* |
| * 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.common.utils; |
| |
| 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.TaxiFare; |
| import org.apache.flink.training.exercises.common.datatypes.TaxiRide; |
| |
| /** |
| * Base for all exercises with a few helper methods. |
| */ |
| public class ExerciseBase { |
| public static SourceFunction<TaxiRide> rides = null; |
| public static SourceFunction<TaxiFare> fares = null; |
| public static SourceFunction<String> strings = null; |
| public static SinkFunction out = null; |
| public static int parallelism = 4; |
| |
| public static final String PATH_TO_RIDE_DATA = "/Users/david/stuff/flink-training/trainingData/nycTaxiRides.gz"; |
| public static final String PATH_TO_FARE_DATA = "/Users/david/stuff/flink-training/trainingData/nycTaxiFares.gz"; |
| |
| /** |
| * Retrieves a test source during unit tests and the given one during normal execution. |
| */ |
| public static SourceFunction<TaxiRide> rideSourceOrTest(SourceFunction<TaxiRide> source) { |
| if (rides == null) { |
| return source; |
| } |
| return rides; |
| } |
| |
| /** |
| * Retrieves a test source during unit tests and the given one during normal execution. |
| */ |
| public static SourceFunction<TaxiFare> fareSourceOrTest(SourceFunction<TaxiFare> source) { |
| if (fares == null) { |
| return source; |
| } |
| return fares; |
| } |
| |
| /** |
| * Retrieves a test source during unit tests and the given one during normal execution. |
| */ |
| public static SourceFunction<String> stringSourceOrTest(SourceFunction<String> source) { |
| if (strings == null) { |
| return source; |
| } |
| return strings; |
| } |
| |
| /** |
| * Prints the given data stream during normal execution and collects outputs during tests. |
| */ |
| public static void printOrTest(org.apache.flink.streaming.api.datastream.DataStream<?> ds) { |
| if (out == null) { |
| ds.print(); |
| } else { |
| ds.addSink(out); |
| } |
| } |
| |
| /** |
| * Prints the given data stream during normal execution and collects outputs during tests. |
| */ |
| public static void printOrTest(org.apache.flink.streaming.api.scala.DataStream<?> ds) { |
| if (out == null) { |
| ds.print(); |
| } else { |
| ds.addSink(out); |
| } |
| } |
| } |