Examples with RocketMqSpout org.apache.storm.rocketmq.spout.RocketMqSpout used on opensource projects

Example 1 with RocketMqSpout

use of org.apache.storm.rocketmq.spout.RocketMqSpout in project storm by apache.

the class WordCountTopology method buildTopology.

public static StormTopology buildTopology(String nameserverAddr, String topic) {
    Properties properties = new Properties();
    properties.setProperty(SpoutConfig.NAME_SERVER_ADDR, nameserverAddr);
    properties.setProperty(SpoutConfig.CONSUMER_GROUP, CONSUMER_GROUP);
    properties.setProperty(SpoutConfig.CONSUMER_TOPIC, CONSUMER_TOPIC);
    RocketMqSpout spout = new RocketMqSpout(properties);
    TupleToMessageMapper mapper = new FieldNameBasedTupleToMessageMapper("word", "count");
    TopicSelector selector = new DefaultTopicSelector(topic);
    properties = new Properties();
    properties.setProperty(RocketMqConfig.NAME_SERVER_ADDR, nameserverAddr);
    RocketMqBolt insertBolt = new RocketMqBolt().withMapper(mapper).withSelector(selector).withProperties(properties);
    // wordSpout ==> countBolt ==> insertBolt
    TopologyBuilder builder = new TopologyBuilder();
    WordCounter bolt = new WordCounter();
    builder.setSpout(WORD_SPOUT, spout, 1);
    builder.setBolt(COUNT_BOLT, bolt, 1).fieldsGrouping(WORD_SPOUT, new Fields("str"));
    builder.setBolt(INSERT_BOLT, insertBolt, 1).shuffleGrouping(COUNT_BOLT);
    return builder.createTopology();
}