KeyExtractor (Nemo Project 0.4 API)

All Superinterfaces:

java.io.Serializable

All Known Implementing Classes:

PairKeyExtractor, SparkKeyExtractor
```
public interface KeyExtractor
extends java.io.Serializable
```
Extracts a key from an element. Keys are used for partitioning.

- Method Summary
  
  All Methods Instance Methods Abstract Methods
  Modifier and Type Method Description
  
  java.lang.Object extractKey(java.lang.Object element)
  Extracts key.

- Method Detail
  - extractKey
```
java.lang.Object extractKey(java.lang.Object element)
```
    Extracts key.
    
    Parameters:
    
    element - Element to get the key from.
    
    Returns:
    
    The extracted key of the element.