org.infinispan.distexec.mapreduce
Interface Mapper<K,V,T>
public interface Mapper<K,V,T>
Implementation of a Mapper class is a component of a MapReduceTask invoked once for each input
entry K,V. Every Mapper instance migrated to an Infinispan node, given a cache entry K,V input
pair transforms that input pair into a result T. Intermediate result T is further reduced using a
Reducer.
- Since:
- 5.0
- Author:
- Manik Surtani, Vladimir Blagojevic
- See Also:
Reducer
,
MapReduceTask
Method Summary |
T |
map(K key,
V value)
Invoked once for each input cache entry K,V transforms that input into a result T. |
map
T map(K key,
V value)
- Invoked once for each input cache entry K,V transforms that input into a result T.
- Parameters:
key
- the kayvalue
- the value
- Returns:
- result T
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