public interface Hasher<V>
Comparator
implementation to also be delegated to during hashCode generation
during grouping partitioning.
If a Comparator is used to compare two types during grouping, its likely the hashCode
value between
the two objects will not be consistent. This allows to objects being equal to hash to the same bucket (reducer)
during partitioning.int hashCode(V value)
value
- will never be null