org.apache.flink.streaming.api.operators

Interface OnWatermarkCallback<KEY>

@Internal
public interface OnWatermarkCallback<KEY>

A callback registered with the InternalWatermarkCallbackService service. This callback will be invoked for all keys registered with the service, upon reception of a watermark.

Method Summary

Modifier and Type	Method and Description
void	onWatermark(KEY key, Watermark watermark) The action to be triggered upon reception of a watermark.

Method Detail

onWatermark

void onWatermark(KEY key,
                 Watermark watermark)
          throws IOException

The action to be triggered upon reception of a watermark.

Parameters:

key - The current key.

watermark - The current watermark.

Throws:

IOException