| /** |
| * 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 |
| * <p/> |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * <p/> |
| * 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.trident; |
| |
| import org.apache.storm.Config; |
| import org.apache.storm.StormSubmitter; |
| import org.apache.storm.generated.StormTopology; |
| import org.apache.storm.trident.Stream; |
| import org.apache.storm.trident.TridentTopology; |
| import org.apache.storm.trident.operation.Consumer; |
| import org.apache.storm.trident.testing.CountAsAggregator; |
| import org.apache.storm.trident.testing.FixedBatchSpout; |
| import org.apache.storm.trident.testing.Split; |
| import org.apache.storm.trident.tuple.TridentTuple; |
| import org.apache.storm.trident.windowing.InMemoryWindowsStoreFactory; |
| import org.apache.storm.trident.windowing.WindowsStoreFactory; |
| import org.apache.storm.trident.windowing.config.SlidingCountWindow; |
| import org.apache.storm.trident.windowing.config.WindowConfig; |
| import org.apache.storm.tuple.Fields; |
| import org.apache.storm.tuple.Values; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| /** |
| * Sample application of trident windowing which uses inmemory store for storing tuples in window. |
| */ |
| public class TridentWindowingInmemoryStoreTopology { |
| private static final Logger LOG = LoggerFactory.getLogger(TridentWindowingInmemoryStoreTopology.class); |
| |
| public static StormTopology buildTopology(WindowsStoreFactory windowStore, WindowConfig windowConfig) throws Exception { |
| FixedBatchSpout spout = new FixedBatchSpout(new Fields("sentence"), 3, new Values("the cow jumped over the moon"), |
| new Values("the man went to the store and bought some candy"), |
| new Values("four score and seven years ago"), |
| new Values("how many apples can you eat"), new Values("to be or not to be the person")); |
| spout.setCycle(true); |
| |
| TridentTopology topology = new TridentTopology(); |
| |
| Stream stream = topology.newStream("spout1", spout).parallelismHint(16).each(new Fields("sentence"), |
| new Split(), new Fields("word")) |
| .window(windowConfig, windowStore, new Fields("word"), new CountAsAggregator(), new Fields("count")) |
| .peek(new Consumer() { |
| @Override |
| public void accept(TridentTuple input) { |
| LOG.info("Received tuple: [{}]", input); |
| } |
| }); |
| |
| return topology.build(); |
| } |
| |
| public static void main(String[] args) throws Exception { |
| Config conf = new Config(); |
| WindowsStoreFactory mapState = new InMemoryWindowsStoreFactory(); |
| String topoName = "wordCounter"; |
| if (args.length > 0) { |
| topoName = args[0]; |
| } |
| |
| conf.setNumWorkers(3); |
| StormSubmitter.submitTopologyWithProgressBar(topoName, conf, buildTopology(mapState, SlidingCountWindow.of(1000, 100))); |
| } |
| } |