Add adds delta to the count of the window represented by start, and returns the new count.

Allow is shorthand for AllowN(time.Now(), 1).

AllowN reports whether n events may happen at time now.

Count returns the accumulated count.

Get returns the count of the window represented by start.

NewLimiter creates a new limiter, and returns a function to stop the possible sync behaviour within the current window.

Reset sets the state of the window with the given settings.

Sync sends a synchronization request.

AddCount increments the accumulated count by n.

IsTimeUp returns whether it's time to sync data to the central datastore.

Limit returns the maximum events permitted to happen during one window size.

Start returns the start boundary.

NewSyncWindow creates an instance of SyncWindow with the given synchronizer.

SetLimit sets a new Limit for the limiter.

Start starts the synchronization goroutine, if any.

Sync tries to exchange data between the window and the central datastore at time now, to keep the window's count up-to-date.

advance updates the current/previous windows resulting from the passage of time.

syncLoop is a worker that receives a sync request and generates the corresponding sync response.

Size returns the time duration of one window size. Note that the size is defined to be read-only, if you need to change the size, create a new limiter

Stop stops the synchronization goroutine, if any, and waits for it to exit.

Sync sends the window's count to the central datastore, and then update the window's count according to the response from the datastore.

Sync tries to send the window's count to the central datastore, or to update the window's count according to the response from the latest synchronizat