Interface PartitionMapper



  • public interface PartitionMapper
    PartitionMapper receives control at the start of a partitioned execution. A PartitionMapper is responsible to provide unique batch properties for each partition.
    • Method Detail

      • mapPartitions

        PartitionPlan mapPartitions​()
                             throws java.lang.Exception
        The mapPartitions method that receives control at the start of partitioned step processing. The method returns a PartitionPlan, which specifies the batch properties for each partition.
        Returns:
        partition plan for a partitioned step.
        Throws:
        java.lang.Exception - is thrown if an error occurs.