/**
* 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();
}
}