Interface JdbcLookupMapper

All Superinterfaces:
JdbcMapper, Serializable
All Known Implementing Classes:

public interface JdbcLookupMapper extends JdbcMapper
  • Method Details

    • toTuple

      List<Values> toTuple(ITuple input, List<Column> columns)
      Converts a DB row to a list of storm values that can be emitted. This is done to allow a single storm input tuple and a single DB row to result in multiple output values.
      input - the input tuple.
      columns - list of columns that represents a row
      a List of storm values that can be emitted. Each item in list is emitted as an output tuple.
    • declareOutputFields

      void declareOutputFields(OutputFieldsDeclarer declarer)
      declare what are the fields that this code will output.