6a770cbd_o_Splunk___Splunk_SDK_for_Java__Description
[Parameter] sourcetype [Input type] monitor, oneshot, script, TCP raw, UPD, Windows perfmon [Description] 
A string that specifies the source type for events from this input, which corresponds to the "sourcetype" field. The source type of an event is the format of the data input from which it originates, such as access_combined or cisco_syslog. The source type also determines how Splunk Enterprise formats your data.
How to get data into Splunk | Splunk SDK for Java
Description