TupleMapper (Storm 2.7.1 API)

All Superinterfaces:

Serializable

All Known Subinterfaces:

RedisFilterMapper, RedisLookupMapper, RedisStoreMapper

All Known Implementing Classes:

WordCountLookupMapper, WordCountStoreMapper
```
public interface TupleMapper
extends Serializable
```
TupleMapper defines how to extract key and value from tuple for Redis.

Method Summary

All Methods Instance Methods Abstract Methods
Modifier and Type	Method	Description
`String`	`getKeyFromTuple(ITuple tuple)`	Extracts key from tuple.
`String`	`getValueFromTuple(ITuple tuple)`	Extracts value from tuple.

- Method Detail
  - getKeyFromTuple
```
String getKeyFromTuple(ITuple tuple)
```
    Extracts key from tuple.
    
    Parameters:
    
    tuple - source tuple
    
    Returns:
    
    key
  - getValueFromTuple
```
String getValueFromTuple(ITuple tuple)
```
    Extracts value from tuple.
    
    Parameters:
    
    tuple - source tuple
    
    Returns:
    
    value