Package org.apache.storm.jdbc.mapper
Interface JdbcLookupMapper
- All Superinterfaces:
- JdbcMapper,- Serializable
- All Known Implementing Classes:
- SimpleJdbcLookupMapper
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Method SummaryModifier and TypeMethodDescriptionvoiddeclareOutputFields(OutputFieldsDeclarer declarer) declare what are the fields that this code will output.Converts a DB row to a list of storm values that can be emitted.Methods inherited from interface org.apache.storm.jdbc.mapper.JdbcMappergetColumns
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Method Details- 
toTupleConverts 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.- Parameters:
- input- the input tuple.
- columns- list of columns that represents a row
- Returns:
- a List of storm values that can be emitted. Each item in list is emitted as an output tuple.
 
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declareOutputFieldsdeclare what are the fields that this code will output.
 
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