@Override
	public ExitStatus afterStep(StepExecution stepExecution) {
		return stepExecution.getExitStatus();
	}
Partition a database table assuming that the data in the column specified
are uniformly distributed. The execution context values will have keys
<code>minValue</code> and <code>maxValue</code> specifying the range of
values to consider in each partition.

@see Partitioner#partition(int)
extensions/spring-xd-extension-batch/src/main/java/org/springframework/batch/integration/x/IncrementalColumnRangePartitioner.java