S3Topology.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
 *
 * 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.s3.bolt;

import backtype.storm.Config;
import backtype.storm.LocalCluster;
import backtype.storm.StormSubmitter;
import backtype.storm.spout.SpoutOutputCollector;
import backtype.storm.task.TopologyContext;
import backtype.storm.topology.OutputFieldsDeclarer;
import backtype.storm.topology.TopologyBuilder;
import backtype.storm.topology.base.BaseRichSpout;
import backtype.storm.tuple.Fields;
import backtype.storm.tuple.Values;

import java.util.Map;
import java.util.UUID;
import java.util.concurrent.ConcurrentHashMap;

import static org.apache.storm.s3.output.S3Configuration.*;

public class S3Topology {
    static final String SENTENCE_SPOUT_ID = "sentence-spout";
    static final String BOLT_ID = "my-bolt";
    static final String TOPOLOGY_NAME = "test-topology";

    public static void main(String[] args) throws Exception {
        Config config = new Config();
        config.put(PREFIX, "test");
        config.put(EXTENSION, ".txt");
        config.put(PATH, "foo");
        config.put(ROTATION_SIZE, 1.0F);
        config.put(ROTATION_UNIT, "MB");
        config.put(BUCKET_NAME, "test-bucket");
        config.put(CONTENT_TYPE, "text/plain");
        SentenceSpout spout = new SentenceSpout();

        S3Bolt bolt = new S3Bolt();

        TopologyBuilder builder = new TopologyBuilder();

        builder.setSpout(SENTENCE_SPOUT_ID, spout, 1);
        // SentenceSpout --> MyBolt
        builder.setBolt(BOLT_ID, bolt, 2).shuffleGrouping(SENTENCE_SPOUT_ID);

        if (args.length == 0) {
            LocalCluster cluster = new LocalCluster();
            cluster.submitTopology(TOPOLOGY_NAME, config, builder.createTopology());
            waitForSeconds(120);
            cluster.killTopology(TOPOLOGY_NAME);
            cluster.shutdown();
            System.exit(0);
        } else if (args.length == 1) {
            StormSubmitter.submitTopology(args[0], config, builder.createTopology());
        } else {
            System.out.println("Usage: S3Topology [topology name]");
        }
    }

    public static void waitForSeconds(int seconds) {
        try {
            Thread.sleep(seconds * 1000);
        } catch (InterruptedException e) {
        }
    }

    public static class SentenceSpout extends BaseRichSpout {
        private ConcurrentHashMap<UUID, Values> pending;
        private SpoutOutputCollector collector;
        private String[] sentences = {
                "my dog has fleas",
                "i like cold beverages",
                "the dog ate my homework",
                "don't have a cow man",
                "i don't think i like fleas"
        };
        private int index = 0;
        private int count = 0;
        private long total = 0L;

        public void declareOutputFields(OutputFieldsDeclarer declarer) {
            declarer.declare(new Fields("sentence", "timestamp"));
        }

        public void open(Map config, TopologyContext context,
                         SpoutOutputCollector collector) {
            this.collector = collector;
            this.pending = new ConcurrentHashMap<UUID, Values>();
        }

        public void nextTuple() {
            Values values = new Values(sentences[index], System.currentTimeMillis());
            UUID msgId = UUID.randomUUID();
            this.pending.put(msgId, values);
            this.collector.emit(values, msgId);
            index++;
            if (index >= sentences.length) {
                index = 0;
            }
            count++;
            total++;
            if (count > 20000) {
                count = 0;
                System.out.println("Pending count: " + this.pending.size() + ", total: " + this.total);
            }
            Thread.yield();
        }

        public void ack(Object msgId) {
            this.pending.remove(msgId);
        }

        public void fail(Object msgId) {
            System.out.println("**** RESENDING FAILED TUPLE");
            this.collector.emit(this.pending.get(msgId), msgId);
        }
    }
}