| Interface | Description | 
|---|---|
| StartpointVisitor<IN,OUT> | A  SystemAdminimplementation should implement this abstraction to supportStartpoint. | 
| Class | Description | 
|---|---|
| Startpoint | Startpoint represents a position in a stream partition. | 
| StartpointOldest | A  Startpointthat represents the earliest offset in a stream partition. | 
| StartpointSpecific | A  Startpointthat represents a specific offset in a stream partition. | 
| StartpointTimestamp | A  Startpointthat represents a timestamp offset in a stream partition. | 
| StartpointUpcoming | A  Startpointthat represents the latest offset in a stream partition. |