Package javax.batch.api.partition

Class PartitionPlanImpl

java.lang.Object
javax.batch.api.partition.PartitionPlanImpl
All Implemented Interfaces:
PartitionPlan
public class PartitionPlanImpl extends Object implements PartitionPlan
The PartitionPlanImpl class provides a basic implementation of the PartitionPlan interface.

  • Constructor Details

    • PartitionPlanImpl

      public PartitionPlanImpl()

  • Method Details

    • setPartitions

      public void setPartitions(int count)
      Description copied from interface: PartitionPlan
      Set number of partitions.
      Specified by:
      setPartitions in interface PartitionPlan
      Parameters:
      count - specifies the partition count

    • setThreads

      public void setThreads(int count)
      Description copied from interface: PartitionPlan
      Set maximum number of threads requested to use to run partitions for this step. A value of '0' requests the batch implementation to use the partition count as the thread count. Note the batch runtime is not required to use this full number of threads; it may not have this many available, and may use less.
      Specified by:
      setThreads in interface PartitionPlan
      Parameters:
      count - specifies the requested thread count

    • setPartitionsOverride

      public void setPartitionsOverride(boolean override)
      Description copied from interface: PartitionPlan
      Specify whether or not to override the partition count from the previous job execution. This applies only to step restart.

      When false is specified, the partition count from the previous job execution is used and any new value set for partition count in the current run is ignored. In addition, partition results from the previous job execution are remembered, and only incomplete partitions are reprocessed.

      When true is specified, the partition count from the current run is used and all results from past partitions are discarded. Any resource cleanup or back out of work done in the previous run is the responsibility of the application. The PartitionReducer artifact's rollbackPartitionedStep method is invoked during restart before any partitions begin processing to provide a cleanup hook.

      Specified by:
      setPartitionsOverride in interface PartitionPlan
      Parameters:
      override - See method description

    • getPartitionsOverride

      public boolean getPartitionsOverride()
      Description copied from interface: PartitionPlan
      Return current value of partition override setting.
      Specified by:
      getPartitionsOverride in interface PartitionPlan
      Returns:
      override setting.
      See Also:

    • setPartitionProperties

      public void setPartitionProperties(Properties[] props)
      Description copied from interface: PartitionPlan
      Sets array of substitution Properties objects for the set of Partitions.
      Specified by:
      setPartitionProperties in interface PartitionPlan
      Parameters:
      props - specifies the Properties object array
      See Also:

    • getPartitions

      public int getPartitions()
      Description copied from interface: PartitionPlan
      Gets count of Partitions.
      Specified by:
      getPartitions in interface PartitionPlan
      Returns:
      Partition count

    • getThreads

      public int getThreads()
      Description copied from interface: PartitionPlan
      Gets maximum number of threads requested to use to run partitions for this step. A value of '0' requests the batch implementation to use the partition count as the thread count. Note the batch runtime is not required to use this full number of threads; it may not have this many available, and may use less.
      Specified by:
      getThreads in interface PartitionPlan
      Returns:
      requested thread count

    • getPartitionProperties

      public Properties[] getPartitionProperties()
      Description copied from interface: PartitionPlan
      Gets array of Partition Properties objects for Partitions.

      These can be used in Job XML substitution using substitution expressions with the syntax: #{partitionPlan['propertyName']}

      Each element of the Properties array returned can be used to resolving substitutions for a single partition. In the typical use case, each Properties element will have a similar set of property names, with a substitution potentially resolving to the corresponding value for each partition.

      Specified by:
      getPartitionProperties in interface PartitionPlan
      Returns:
      Partition Properties object array