CepStream.HoppingWindow<TPayload> Method (CepStream<TPayload>, TimeSpan, TimeSpan, DateTime, HoppingWindowOutputPolicy)
Transforms a stream to a window stream where each member is a CepWindow. The window is defined by constant window size and hop size timespans. You can also provide an alignment time as a reference for the starting point for the window.
Namespace: Microsoft.ComplexEventProcessing.Linq
Assembly: Microsoft.ComplexEventProcessing (in Microsoft.ComplexEventProcessing.dll)
Syntax
public static CepWindowStream<CepWindow<TPayload>> HoppingWindow<TPayload>(
this CepStream<TPayload> source,
TimeSpan windowSize,
TimeSpan hopSize,
DateTime alignment,
HoppingWindowOutputPolicy outputPolicy
)
Type Parameters
- TPayload
The type of the input event payload.
Parameters
- source
Type: Microsoft.ComplexEventProcessing.Linq.CepStream<TPayload>
The CepStream to apply the HoppingWindow operation against.
- windowSize
Type: System.TimeSpan
The length of the window.
- hopSize
Type: System.TimeSpan
The hop size of the window.
- alignment
Type: System.DateTime
The reference time to align window start times.
- outputPolicy
Type: Microsoft.ComplexEventProcessing.Linq.HoppingWindowOutputPolicy
Indicates how output events of the window operation are altered before they are introduced back into the stream.
Return Value
Type: Microsoft.ComplexEventProcessing.Linq.CepWindowStream<CepWindow<TPayload>>
A window stream to which aggregates, ranking, or user-defined operations can be applied to.
Usage Note
In Visual Basic and C#, you can call this method as an instance method on any object of type CepStream<TPayload>. When you use instance method syntax to call this method, omit the first parameter. For more information, see https://msdn.microsoft.com/en-us/library/bb384936(v=sql.105) or https://msdn.microsoft.com/en-us/library/bb383977(v=sql.105).
Remarks
Uses a default input policy that clips both the start and end time of the event to the window size. For more information, see Using Event Windows.