| /** |
| * 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 storm.starter; |
| |
| import backtype.storm.Config; |
| import backtype.storm.LocalCluster; |
| import backtype.storm.testing.FeederSpout; |
| import backtype.storm.topology.TopologyBuilder; |
| import backtype.storm.tuple.Fields; |
| import backtype.storm.tuple.Values; |
| import backtype.storm.utils.Utils; |
| import storm.starter.bolt.SingleJoinBolt; |
| |
| public class SingleJoinExample { |
| public static void main(String[] args) { |
| FeederSpout genderSpout = new FeederSpout(new Fields("id", "gender")); |
| FeederSpout ageSpout = new FeederSpout(new Fields("id", "age")); |
| |
| TopologyBuilder builder = new TopologyBuilder(); |
| builder.setSpout("gender", genderSpout); |
| builder.setSpout("age", ageSpout); |
| builder.setBolt("join", new SingleJoinBolt(new Fields("gender", "age"))).fieldsGrouping("gender", new Fields("id")) |
| .fieldsGrouping("age", new Fields("id")); |
| |
| Config conf = new Config(); |
| conf.setDebug(true); |
| |
| LocalCluster cluster = new LocalCluster(); |
| cluster.submitTopology("join-example", conf, builder.createTopology()); |
| |
| for (int i = 0; i < 10; i++) { |
| String gender; |
| if (i % 2 == 0) { |
| gender = "male"; |
| } |
| else { |
| gender = "female"; |
| } |
| genderSpout.feed(new Values(i, gender)); |
| } |
| |
| for (int i = 9; i >= 0; i--) { |
| ageSpout.feed(new Values(i, i + 20)); |
| } |
| |
| Utils.sleep(2000); |
| cluster.shutdown(); |
| } |
| } |