The process method does the work
of the batchlet. If this method
throws an exception, the batchlet
step ends with a batch status of
exit status string
java.lang.Exception - if an error occurs.
The stop method is invoked by the batch
runtime as part of JobOperator.stop()
method processing. This method is invoked
on a thread other than the thread on which
the batchlet process method is running.