trait WatermarkProvider extends AnyRef
Trait for implementing watermark tracking in a stream.
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- abstract def currentWatermark: Timestamp
Returns the current watermark.
- abstract def initialize(initialWatermark: Timestamp): Timestamp
Initializes the provider to a specified watermark.
Initializes the provider to a specified watermark.
- initialWatermark
The initial watermark to initialize to.
- returns
The initial watermark.
- abstract def observeEvent(timestamp: Timestamp): Timestamp
Observes a new event and moves the watermark forward if needed.
Observes a new event and moves the watermark forward if needed.
- timestamp
Timestamp of the new event.
- returns
The current watermark.
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