CepStream.HoppingWindow<TPayload> Method (CepStream<TPayload>, TimeSpan, TimeSpan, HoppingWindowOutputPolicy)
Transforms a stream to a window stream where each member is a CepWindow. The window is defined by the constant window size and hop size timespans.
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,
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.
- outputPolicy
Type: Microsoft.ComplexEventProcessing.Linq.HoppingWindowOutputPolicy
Indicates how the output events of the window operation are altered.
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 start and end times of the events to the window size. For more information, see Using Event Windows.
Examples
var hoppingAgg = from w in inputStream.HoppingWindow(TimeSpan.FromHours(1),
TimeSpan.FromMinutes(10),
WindowOutputPolicy.ClipToWindowEnd)
select new { sum = w.Sum(e => e.i) };