Examples with WordCountValueMapper org.apache.storm.hbase.topology.WordCountValueMapper used on opensource projects

Example 1 with WordCountValueMapper

use of org.apache.storm.hbase.topology.WordCountValueMapper in project storm by apache.

the class WordCountTrident method buildTopology.

public static StormTopology buildTopology(String hbaseRoot) {
    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);
    TridentHBaseMapper tridentHBaseMapper = new SimpleTridentHBaseMapper().withColumnFamily("cf").withColumnFields(new Fields("word")).withCounterFields(new Fields("count")).withRowKeyField("word");
    HBaseValueMapper rowToStormValueMapper = new WordCountValueMapper();
    HBaseProjectionCriteria projectionCriteria = new HBaseProjectionCriteria();
    projectionCriteria.addColumn(new HBaseProjectionCriteria.ColumnMetaData("cf", "count"));
    HBaseState.Options options = new HBaseState.Options().withConfigKey(hbaseRoot).withDurability(Durability.SYNC_WAL).withMapper(tridentHBaseMapper).withProjectionCriteria(projectionCriteria).withRowToStormValueMapper(rowToStormValueMapper).withTableName("WordCount");
    StateFactory factory = new HBaseStateFactory(options);
    TridentTopology topology = new TridentTopology();
    Stream stream = topology.newStream("spout1", spout);
    stream.partitionPersist(factory, fields, new HBaseUpdater(), new Fields());
    TridentState state = topology.newStaticState(factory);
    stream = stream.stateQuery(state, new Fields("word"), new HBaseQuery(), new Fields("columnName", "columnValue"));
    stream.each(new Fields("word", "columnValue"), new PrintFunction(), new Fields());
    return topology.build();
}