| /** |
| * 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.storm.starter.streams; |
| |
| import org.apache.storm.Config; |
| import org.apache.storm.StormSubmitter; |
| import org.apache.storm.starter.spout.RandomIntegerSpout; |
| import org.apache.storm.streams.Pair; |
| import org.apache.storm.streams.PairStream; |
| import org.apache.storm.streams.Stream; |
| import org.apache.storm.streams.StreamBuilder; |
| import org.apache.storm.streams.operations.mappers.TupleValueMappers; |
| import org.apache.storm.streams.tuple.Tuple3; |
| import org.apache.storm.streams.windowing.TumblingWindows; |
| import org.apache.storm.topology.base.BaseWindowedBolt.Count; |
| |
| /** |
| * An example that illustrates the usage of typed tuples (TupleN<..>) and {@link TupleValueMappers}. |
| */ |
| public class TypedTupleExample { |
| |
| /** |
| * The spout emits sequences of (Integer, Long, Long). TupleValueMapper can be used to extract fields |
| * from the values and produce a stream of typed tuple (Tuple3<Integer, Long, Long> in this case. |
| */ |
| public static void main(String[] args) throws Exception { |
| StreamBuilder builder = new StreamBuilder(); |
| Stream<Tuple3<Integer, Long, Long>> stream = builder.newStream(new RandomIntegerSpout(), TupleValueMappers.of(0, 1, 2)); |
| |
| PairStream<Long, Integer> pairs = stream.mapToPair(t -> Pair.of(t.value2 / 10000, t.value1)); |
| |
| pairs.window(TumblingWindows.of(Count.of(10))).groupByKey().print(); |
| |
| String topoName = "test"; |
| if (args.length > 0) { |
| topoName = args[0]; |
| } |
| Config config = new Config(); |
| config.setNumWorkers(1); |
| StormSubmitter.submitTopologyWithProgressBar(topoName, config, builder.build()); |
| } |
| } |