[This topic is pre-release documentation and is subject to change in future releases. Blank topics are included as placeholders.]

This view is a moving timeWindow extending the specified amount of milliseconds into the past. The view bases the timeWindow on the time obtained from the scheduling service. All incoming events receive a timestamp and are placed in a sorted map by timestamp. The view does not care about old data published by the parent view to this view. Events leave or expire from the time timeWindow by means of a scheduled callback registered with the scheduling service. Thus child views receive updates containing old data only asynchronously as the system-time-based timeWindow moves on. However child views receive updates containing new data as soon as the new data arrives.

The following tables list the members exposed by the TimeWindowView type.

Public Methods

  NameDescription
AddView
Add a view to the viewable object.
(Inherited from ViewSupport.)
AttachesTo
Return null if the view will accept being attached to a particular object.
(Overrides .AttachesTo(Viewable).)
Equals (Inherited from Object.)
Expire
This method removes (expires) objects from the window and schedules a new callback for the time when the next oldest message would expire from the window.

GetEnumerator
Returns an enumerator that iterates through the collection.
(Overrides .GetEnumerator().)
GetHashCode (Inherited from Object.)
GetType (Inherited from Object.)
GetViews
Returns all added views.
(Inherited from ViewSupport.)
RemoveView
Remove a view.
(Inherited from ViewSupport.)
ToString
Returns a String that represents the current Object.
(Overrides .ToString().)
Update
Notify that data has been added or removed from the Viewable parent. The last object in the newData array of objects would be the newest object added to the parent view. The first object of the oldData array of objects would be the oldest object removed from the parent view.

If the call to update contains new (inserted) data, then the first argument will be a non-empty list and the second will be empty. Similarly, if the call is a notification of deleted data, then the first argument will be empty and the second will be non-empty. Either the newData or oldData will be non-null. This method won't be called with both arguments being null, but either one could be null. The same is true for zero-length arrays. Either newData or oldData will be non-empty. If both are non-empty, then the update is a modification notification.

When update() is called on a view by the parent object, the data in newData will be in the collection of the parent, and its data structures will be arranged to reflect that. The data in oldData will not be in the parent's data structures, and any access to the parent will indicate that that data is no longer there.

(Overrides .Update(EventBean[](), EventBean[]()).)

Protected Methods

  NameDescription
Finalize (Inherited from Object.)
MemberwiseClone (Inherited from Object.)

Protected Fields

  NameDescription
parent
Parent viewable to this view - directly accessible by subclasses.
(Inherited from ViewSupport.)

Public Constructors

  NameDescription
TimeWindowViewNewOverloaded.

Public Properties

  NameDescription
EventType
Provides metadata information about the type of object the event collection contains.
(Overrides .EventType.)
HasViews
Test is there are any views to the Viewable.
(Inherited from ViewSupport.)
Id
Gets the unique id for the view
(Inherited from ViewSupport.)
MillisecondsBeforeExpiry
Gets or sets the size of the time window in millisecond.

Parent
Gets or sets the View's parent Viewable.
(Inherited from ViewSupport.)
ViewServiceContext
Gets or sets the context instances used by the view.

Explicit Interface Implementations

  NameDescription
Explicit interface implemetationIEnumerable.System.Collections.IEnumerable.GetEnumerator
Returns an enumerator that iterates through a collection.
(Inherited from ViewSupport.)