Interface PartitionNameProvider

Optional interface for Partitioner implementations that need to use a custom naming scheme for partitions. It is not necessary to implement this interface if a partitioner extends SimplePartitioner and re-uses the default partition names.

If a partitioner does implement this interface, however, on a restart the Partitioner.partition(int) method will not be called again, instead the partitions will be re-used from the last execution, and matched by name with the results of getPartitionNames(int). This can be a useful performance optimisation if the partitioning process is expensive.