Examples with MongoUpdateBolt org.apache.storm.mongodb.bolt.MongoUpdateBolt used on opensource projects

Example 1 with MongoUpdateBolt

use of org.apache.storm.mongodb.bolt.MongoUpdateBolt in project storm by apache.

the class UpdateWordCount method main.

public static void main(String[] args) throws Exception {
    String url = TEST_MONGODB_URL;
    String collectionName = TEST_MONGODB_COLLECTION_NAME;
    if (args.length >= 2) {
        url = args[0];
        collectionName = args[1];
    }
    WordSpout spout = new WordSpout();
    WordCounter bolt = new WordCounter();
    MongoUpdateMapper mapper = new SimpleMongoUpdateMapper().withFields("word", "count");
    QueryFilterCreator filterCreator = new SimpleQueryFilterCreator().withField("word");
    MongoUpdateBolt updateBolt = new MongoUpdateBolt(url, collectionName, filterCreator, mapper);
    // if a new document should be inserted if there are no matches to the query filter
    // updateBolt.withUpsert(true);
    // whether find all documents according to the query filter
    // updateBolt.withMany(true);
    // wordSpout ==> countBolt ==> MongoUpdateBolt
    TopologyBuilder builder = new TopologyBuilder();
    builder.setSpout(WORD_SPOUT, spout, 1);
    builder.setBolt(COUNT_BOLT, bolt, 1).shuffleGrouping(WORD_SPOUT);
    builder.setBolt(UPDATE_BOLT, updateBolt, 1).fieldsGrouping(COUNT_BOLT, new Fields("word"));
    String topoName = "test";
    if (args.length == 3) {
        topoName = args[2];
    } else if (args.length > 3) {
        System.out.println("Usage: UpdateWordCount <mongodb url> <mongodb collection> [topology name]");
        return;
    }
    Config config = new Config();
    StormSubmitter.submitTopology(topoName, config, builder.createTopology());
}