Package org.apache.storm.windowing
Interface Event<T>
- Type Parameters:
T- the type of the object thats wrapped. E.g Tuple
- All Known Implementing Classes:
EventImpl,WaterMarkEvent
public interface Event<T>
An event is a wrapper object that gets stored in the window.
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Method Summary
Modifier and TypeMethodDescriptionget()Returns the wrapped object, E.g. a tuplelongThe event timestamp in millis.booleanIf this is a watermark event or not.
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Method Details
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getTimestamp
long getTimestamp()The event timestamp in millis. This could be the time when the source generated the tuple or the time when the tuple was received by a bolt.- Returns:
- the event timestamp in milliseconds.
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get
T get()Returns the wrapped object, E.g. a tuple- Returns:
- the wrapped object.
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isWatermark
boolean isWatermark()If this is a watermark event or not. Watermark events are used for tracking time while processing event based ts.- Returns:
- true if this is a watermark event
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