| /* |
| * 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.samza.test.framework; |
| |
| import java.util.ArrayList; |
| import java.util.Arrays; |
| import java.util.Collection; |
| import java.util.Collections; |
| import java.util.List; |
| import org.apache.samza.application.StreamApplication; |
| import org.apache.samza.application.descriptors.StreamApplicationDescriptor; |
| import org.apache.samza.operators.MessageStream; |
| import org.apache.samza.operators.Scheduler; |
| import org.apache.samza.operators.functions.FlatMapFunction; |
| import org.apache.samza.operators.functions.ScheduledFunction; |
| import org.apache.samza.serializers.JsonSerdeV2; |
| import org.apache.samza.system.kafka.descriptors.KafkaInputDescriptor; |
| import org.apache.samza.system.kafka.descriptors.KafkaSystemDescriptor; |
| import org.apache.samza.test.operator.data.PageView; |
| |
| public class TestSchedulingApp implements StreamApplication { |
| public static final String PAGE_VIEWS = "page-views"; |
| |
| @Override |
| public void describe(StreamApplicationDescriptor appDescriptor) { |
| final JsonSerdeV2<PageView> serde = new JsonSerdeV2<>(PageView.class); |
| KafkaSystemDescriptor ksd = new KafkaSystemDescriptor("kafka"); |
| KafkaInputDescriptor<PageView> isd = ksd.getInputDescriptor(PAGE_VIEWS, serde); |
| final MessageStream<PageView> pageViews = appDescriptor.getInputStream(isd); |
| final MessageStream<PageView> output = pageViews.flatMap(new FlatmapScheduledFn()); |
| |
| MessageStreamAssert.that("Output from scheduling function should container all complete messages", output, serde) |
| .containsInAnyOrder( |
| Arrays.asList( |
| new PageView("v1-complete", "p1", "u1"), |
| new PageView("v2-complete", "p2", "u1"), |
| new PageView("v3-complete", "p1", "u2"), |
| new PageView("v4-complete", "p3", "u2") |
| )); |
| } |
| |
| private static class FlatmapScheduledFn |
| implements FlatMapFunction<PageView, PageView>, ScheduledFunction<String, PageView> { |
| |
| private transient List<PageView> pageViews; |
| private transient Scheduler<String> scheduler; |
| |
| @Override |
| public void schedule(Scheduler<String> scheduler) { |
| this.scheduler = scheduler; |
| this.pageViews = new ArrayList<>(); |
| } |
| |
| @Override |
| public Collection<PageView> apply(PageView message) { |
| final PageView pv = new PageView(message.getViewId() + "-complete", message.getPageId(), message.getUserId()); |
| pageViews.add(pv); |
| |
| if (pageViews.size() == 2) { |
| //got all messages for this task |
| final long time = System.currentTimeMillis() + 100; |
| scheduler.schedule("CompleteScheduler", time); |
| } |
| return Collections.emptyList(); |
| } |
| |
| @Override |
| public Collection<PageView> onCallback(String key, long time) { |
| return pageViews; |
| } |
| } |
| } |