AFEventSource Class

SystemObject
  OSIsoft.AF.DataAFEventSource

public abstract class AFEventSource : IDisposable

Public MustInherit Class AFEventSource
	Implements IDisposable

Dim instance As AFEventSource

public ref class AFEventSource abstract : IDisposable

[<AbstractClassAttribute>]
type AFEventSource =  
    class
        interface IDisposable
    end

Data Reference needs to provide a static method CreateDataPipe that returns an AFEventSource object. The AFEventSource has the following abstract methods that the implementor has to provide: AddSignup, RemoveSignup, GetEvents() and Dispose(bool). AFEventSource base class has methods to publish data pipe events and report errors. The base class also maintains a dictionary of the AFAttributes being monitored by the eventsource. The AddSignup and RemoveSignup are methods that allow the implementor to handle adding and removing data streams for the pipe from the system of record. The GetEvents method is to get data pipe events from the system of record. The event source also supports an option to return current events for each AFAttribute as the first data pipe event. The base class has implementation for handling the initialization option if the system of record does not have native support for such option. The implementor can override the virtual method GenerateInitialEvents if the system of record has native support to return current event as initial event.

AFSDK

Supported in: 3.1.1, 3.1.0, 3.0.2, 3.0.1, 3.0.0, 2.10.11, 2.10.5, 2.10.0, 2.10, 2.9.5, 2.9, 2.8.5, 2.8, 2.7.5, 2.7, 2.6