javax.batch.api.partition

Interface PartitionCollector

Contents

  • public interface PartitionCollector
    PartitionCollector provides a way to pass data from individual partitions to a single point of control running on the step's parent thread. The PartitionAnalyzer is used to receive and process this data.

    • Method Detail

      • collectPartitionData

        Serializable collectPartitionData()
                           throws Exception
        The collectPartitionData method receives control periodically during partition processing. This method receives control on each thread processing a partition as follows:

        1. for a chunk type step, it receives control after every chunk checkpoint and then one last time at the end of the partition;
        2. for a batchlet type step, it receives control once at the end of the batchlet.

        Note the collector is not called if the partition terminates due to an unhandled exception.

        Returns:
        an Serializable object to pass to the PartitionAnalyzer.
        Throws:
        Exception - is thrown if an error occurs.

Document created the 11/06/2005, last modified the 18/08/2025
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