For more technologies supported by Talend, see Talend components.
In this scenario, an one-single-component Job uses the tSAPIDocInput component to keep listening to the creation of IDoc files in a given SAP R/3 system.
To replicate this scenario, you need to:
Create an RFC Destination on the given SAP R/3 system.
Configure tSAPIDocInput to listen to the invocation from this SAP R/3 system.