Examples with SimpleMongoLookupMapper org.apache.storm.mongodb.common.mapper.SimpleMongoLookupMapper used on opensource projects

Example 1 with SimpleMongoLookupMapper

use of org.apache.storm.mongodb.common.mapper.SimpleMongoLookupMapper in project storm by apache.

the class LookupWordCount 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();
    TotalWordCounter totalBolt = new TotalWordCounter();
    MongoLookupMapper mapper = new SimpleMongoLookupMapper().withFields("word", "count");
    QueryFilterCreator filterCreator = new SimpleQueryFilterCreator().withField("word");
    MongoLookupBolt lookupBolt = new MongoLookupBolt(url, collectionName, filterCreator, mapper);
    // wordspout -> lookupbolt -> totalCountBolt
    TopologyBuilder builder = new TopologyBuilder();
    builder.setSpout(WORD_SPOUT, spout, 1);
    builder.setBolt(LOOKUP_BOLT, lookupBolt, 1).shuffleGrouping(WORD_SPOUT);
    builder.setBolt(TOTAL_COUNT_BOLT, totalBolt, 1).fieldsGrouping(LOOKUP_BOLT, new Fields("word"));
    String topoName = "test";
    if (args.length == 3) {
        topoName = args[2];
    } else if (args.length > 3) {
        System.out.println("Usage: LookupWordCount <mongodb url> <mongodb collection> [topology name]");
        return;
    }
    Config config = new Config();
    StormSubmitter.submitTopology(topoName, config, builder.createTopology());
}