| /** |
| * 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.apex.malhar.lib.window.impl; |
| |
| import java.util.ArrayList; |
| import java.util.List; |
| import java.util.Set; |
| |
| import org.joda.time.Duration; |
| |
| import org.apache.apex.malhar.lib.io.ConsoleOutputOperator; |
| import org.apache.apex.malhar.lib.window.ControlTuple; |
| import org.apache.apex.malhar.lib.window.TriggerOption; |
| import org.apache.apex.malhar.lib.window.Tuple; |
| import org.apache.apex.malhar.lib.window.Window; |
| import org.apache.apex.malhar.lib.window.WindowOption; |
| import org.apache.apex.malhar.lib.window.WindowState; |
| import org.apache.apex.malhar.lib.window.WindowedStorage; |
| import org.apache.apex.malhar.lib.window.accumulation.CoGroup; |
| |
| import org.apache.hadoop.conf.Configuration; |
| |
| import com.datatorrent.api.Context; |
| import com.datatorrent.api.DAG; |
| import com.datatorrent.api.DefaultInputPort; |
| import com.datatorrent.api.DefaultOutputPort; |
| import com.datatorrent.api.InputOperator; |
| import com.datatorrent.api.LocalMode; |
| import com.datatorrent.api.StreamingApplication; |
| import com.datatorrent.common.util.BaseOperator; |
| |
| /** |
| * Example application to show usage of Windowed Merge Operator. Two generators send out two streams of integers, |
| * the Merge operator will do a co-group to Merge all income tuples and send output to collector and output to console. |
| * User can choose different window options and see how the application behaves. |
| */ |
| public class WindowedMergeOperatorTestApplication implements StreamingApplication |
| { |
| private static WindowedStorage.WindowedPlainStorage<WindowState> windowStateMap = new InMemoryWindowedStorage<>(); |
| private static final long windowDuration = 1000; |
| |
| |
| public static Window.TimeWindow assignTestWindow(long timestamp) |
| { |
| long beginTimestamp = timestamp - timestamp % windowDuration; |
| Window.TimeWindow window = new Window.TimeWindow(beginTimestamp, windowDuration); |
| if (!windowStateMap.containsWindow(window)) { |
| windowStateMap.put(window, new WindowState()); |
| } |
| return window; |
| } |
| |
| public static class NumGen1 extends BaseOperator implements InputOperator |
| { |
| private int i; |
| private long watermarkTime; |
| private long startingTime; |
| |
| public final transient DefaultOutputPort<Tuple.WindowedTuple<Integer>> output = new DefaultOutputPort<>(); |
| public final transient DefaultOutputPort<ControlTuple> watermarkDefaultOutputPort = new DefaultOutputPort<>(); |
| |
| @Override |
| public void setup(Context.OperatorContext context) |
| { |
| super.setup(context); |
| startingTime = System.currentTimeMillis(); |
| watermarkTime = System.currentTimeMillis() + 10000; |
| i = 1; |
| } |
| |
| @Override |
| public void emitTuples() |
| { |
| while (i <= 20) { |
| if (System.currentTimeMillis() - startingTime >= (i + 1) * 400) { |
| output.emit(new Tuple.WindowedTuple<Integer>(assignTestWindow(System.currentTimeMillis()), i)); |
| i++; |
| } |
| } |
| } |
| |
| @Override |
| public void endWindow() |
| { |
| if (i <= 20) { |
| watermarkDefaultOutputPort.emit(new WatermarkImpl(watermarkTime)); |
| } |
| } |
| } |
| |
| public static class NumGen2 extends BaseOperator implements InputOperator |
| { |
| private int i; |
| private long watermarkTime; |
| private long startingTime; |
| |
| public final transient DefaultOutputPort<Tuple.WindowedTuple<Integer>> output = new DefaultOutputPort<>(); |
| public final transient DefaultOutputPort<ControlTuple> watermarkDefaultOutputPort = new DefaultOutputPort<>(); |
| |
| |
| @Override |
| public void setup(Context.OperatorContext context) |
| { |
| super.setup(context); |
| startingTime = System.currentTimeMillis(); |
| watermarkTime = System.currentTimeMillis() + 10000; |
| i = 1; |
| } |
| |
| @Override |
| public void emitTuples() |
| { |
| while (i <= 20) { |
| if (System.currentTimeMillis() - startingTime >= (i + 1) * 400) { |
| output.emit(new Tuple.WindowedTuple<Integer>(assignTestWindow(System.currentTimeMillis()), 10 * i)); |
| i++; |
| } |
| } |
| } |
| |
| @Override |
| public void endWindow() |
| { |
| if (i <= 20) { |
| watermarkDefaultOutputPort.emit(new WatermarkImpl(watermarkTime)); |
| } |
| } |
| } |
| |
| public static class Collector extends BaseOperator |
| { |
| public static List<List<List<Integer>>> result = new ArrayList<>(); |
| |
| public final transient DefaultOutputPort<Tuple<List<List<Integer>>>> output = new DefaultOutputPort<>(); |
| |
| public final transient DefaultInputPort<Tuple<List<List<Integer>>>> input = new DefaultInputPort<Tuple<List<List<Integer>>>>() |
| { |
| @Override |
| public void process(Tuple<List<List<Integer>>> tuple) |
| { |
| result.add(tuple.getValue()); |
| output.emit(tuple); |
| } |
| }; |
| } |
| |
| @Override |
| public void populateDAG(DAG dag, Configuration conf) |
| { |
| WindowedMergeOperatorImpl<Integer, Integer, List<Set<Integer>>, List<List<Integer>>> op |
| = dag.addOperator("Merge", new WindowedMergeOperatorImpl<Integer, Integer, List<Set<Integer>>, List<List<Integer>>>()); |
| op.setAccumulation(new CoGroup<Integer>()); |
| op.setDataStorage(new InMemoryWindowedStorage<List<Set<Integer>>>()); |
| op.setRetractionStorage(new InMemoryWindowedStorage<List<List<Integer>>>()); |
| op.setWindowStateStorage(windowStateMap); |
| |
| // Can select one of the following window options, or don't select any of them. |
| //op.setWindowOption(new WindowOption.GlobalWindow()); |
| op.setWindowOption(new WindowOption.TimeWindows(Duration.millis(2000))); |
| |
| op.setTriggerOption(new TriggerOption().withEarlyFiringsAtEvery(1).accumulatingFiredPanes()); |
| op.setAllowedLateness(Duration.millis(500)); |
| |
| NumGen1 numGen1 = dag.addOperator("numGen1", new NumGen1()); |
| NumGen2 numGen2 = dag.addOperator("numGen2", new NumGen2()); |
| |
| Collector collector = dag.addOperator("collector", new Collector()); |
| ConsoleOutputOperator con = dag.addOperator("console", new ConsoleOutputOperator()); |
| |
| dag.addStream("num1", numGen1.output, op.input); |
| dag.addStream("num2", numGen2.output, op.input2); |
| dag.addStream("wm1", numGen1.watermarkDefaultOutputPort, op.controlInput); |
| dag.addStream("wm2", numGen2.watermarkDefaultOutputPort, op.controlInput2); |
| |
| dag.addStream("MergedResult", op.output, collector.input); |
| dag.addStream("output", collector.output, con.input); |
| } |
| |
| public static void main(String[] args) throws Exception |
| { |
| LocalMode lma = LocalMode.newInstance(); |
| Configuration conf = new Configuration(false); |
| lma.prepareDAG(new WindowedMergeOperatorTestApplication(), conf); |
| LocalMode.Controller lc = lma.getController(); |
| lc.run(20000); |
| } |
| } |