Examples with HBaseLookupBolt org.apache.storm.hbase.bolt.HBaseLookupBolt used on opensource projects

Example 1 with HBaseLookupBolt

use of org.apache.storm.hbase.bolt.HBaseLookupBolt in project storm by apache.

the class LookupWordCount method main.

public static void main(String[] args) throws Exception {
    Config config = new Config();
    Map<String, Object> hbConf = new HashMap<String, Object>();
    if (args.length > 0) {
        hbConf.put("hbase.rootdir", args[0]);
    }
    config.put("hbase.conf", hbConf);
    WordSpout spout = new WordSpout();
    TotalWordCounter totalBolt = new TotalWordCounter();
    SimpleHBaseMapper mapper = new SimpleHBaseMapper().withRowKeyField("word");
    HBaseProjectionCriteria projectionCriteria = new HBaseProjectionCriteria();
    projectionCriteria.addColumn(new HBaseProjectionCriteria.ColumnMetaData("cf", "count"));
    WordCountValueMapper rowToTupleMapper = new WordCountValueMapper();
    HBaseLookupBolt hBaseLookupBolt = new HBaseLookupBolt("WordCount", mapper, rowToTupleMapper).withConfigKey("hbase.conf").withProjectionCriteria(projectionCriteria);
    //wordspout -> lookupbolt -> totalCountBolt
    TopologyBuilder builder = new TopologyBuilder();
    builder.setSpout(WORD_SPOUT, spout, 1);
    builder.setBolt(LOOKUP_BOLT, hBaseLookupBolt, 1).shuffleGrouping(WORD_SPOUT);
    builder.setBolt(TOTAL_COUNT_BOLT, totalBolt, 1).fieldsGrouping(LOOKUP_BOLT, new Fields("columnName"));
    if (args.length == 1) {
        try (LocalCluster cluster = new LocalCluster();
            LocalTopology topo = cluster.submitTopology("test", config, builder.createTopology())) {
            Thread.sleep(30000);
        }
        System.exit(0);
    } else if (args.length == 2) {
        StormSubmitter.submitTopology(args[1], config, builder.createTopology());
    } else {
        System.out.println("Usage: LookupWordCount <hbase.rootdir>");
    }
}