This method, called process in the example above, needs to set the instanceID, to a value that matches that set by the chunker, then call batchStreamHelper.runStream to start the stream processing. Typically this method just returns at this point, allowing the stream process to exit, however by restarting from the beginning above another stream instance could be run in the same process after the first stream has completed, see Running Multiple Chunker Processes in a Single Instance.