TridentHBaseWindowingStoreTopology.java

/**
 * 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 java.util.HashMap;
import org.apache.storm.Config;
import org.apache.storm.StormSubmitter;
import org.apache.storm.generated.StormTopology;
import org.apache.storm.hbase.trident.windowing.HBaseWindowsStoreFactory;
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.WindowsStoreFactory;
import org.apache.storm.trident.windowing.config.TumblingCountWindow;
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 {@link HBaseWindowsStoreFactory}'s store for storing tuples in window.
 *
 */
public class TridentHBaseWindowingStoreTopology {
    private static final Logger LOG = LoggerFactory.getLogger(TridentHBaseWindowingStoreTopology.class);

    public static StormTopology buildTopology(WindowsStoreFactory windowsStore) 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(TumblingCountWindow.of(1000), windowsStore, 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();
        conf.setMaxSpoutPending(20);
        conf.put(Config.TOPOLOGY_TRIDENT_WINDOWING_INMEMORY_CACHE_LIMIT, 100);

        // window-state table should already be created with cf:tuples column
        HBaseWindowsStoreFactory windowStoreFactory =
            new HBaseWindowsStoreFactory(new HashMap<String, Object>(), "window-state", "cf".getBytes("UTF-8"), "tuples".getBytes("UTF-8"));
        String topoName = "wordCounterWithWindowing";
        if (args.length > 0) {
            topoName = args[0];
        }
        conf.setNumWorkers(3);
        StormSubmitter.submitTopologyWithProgressBar(topoName, conf, buildTopology(windowStoreFactory));
    }

}