Package org.apache.storm.windowing
Interface Event<T>
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- 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
All Methods Instance Methods Abstract Methods Modifier and Type Method Description T
get()
Returns the wrapped object, E.g.long
getTimestamp()
The event timestamp in millis.boolean
isWatermark()
If this is a watermark event or not.
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Method Detail
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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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