Examples with RocketMqStateUpdater org.apache.storm.rocketmq.trident.state.RocketMqStateUpdater used on opensource projects

Example 1 with RocketMqStateUpdater

use of org.apache.storm.rocketmq.trident.state.RocketMqStateUpdater in project storm by apache.

the class WordCountTrident method buildTopology.

public static StormTopology buildTopology(String nameserverAddr, String topic) {
    Fields fields = new Fields("word", "count");
    FixedBatchSpout spout = new FixedBatchSpout(fields, 4, new Values("storm", 1), new Values("trident", 1), new Values("needs", 1), new Values("javadoc", 1));
    spout.setCycle(true);
    TupleToMessageMapper mapper = new FieldNameBasedTupleToMessageMapper("word", "count");
    TopicSelector selector = new DefaultTopicSelector(topic);
    Properties properties = new Properties();
    properties.setProperty(RocketMqConfig.NAME_SERVER_ADDR, nameserverAddr);
    RocketMqState.Options options = new RocketMqState.Options().withMapper(mapper).withSelector(selector).withProperties(properties);
    StateFactory factory = new RocketMqStateFactory(options);
    TridentTopology topology = new TridentTopology();
    Stream stream = topology.newStream("spout1", spout);
    stream.partitionPersist(factory, fields, new RocketMqStateUpdater(), new Fields());
    return topology.build();
}