SerialDispatchQueueScheduler

public class SerialDispatchQueueScheduler : SchedulerType

Abstracts the work that needs to be performed on a specific dispatch_queue_t. It will make sure that even if concurrent dispatch queue is passed, it’s transformed into a serial one.

It is extremely important that this scheduler is serial, because certain operator perform optimizations that rely on that property.

Because there is no way of detecting is passed dispatch queue serial or concurrent, for every queue that is being passed, worst case (concurrent) will be assumed, and internal serial proxy dispatch queue will be created.

This scheduler can also be used with internal serial queue alone.

In case some customization need to be made on it before usage, internal serial queue can be customized using serialQueueConfiguration callback.

  • Undocumented

    Declaration

    Swift

    public typealias TimeInterval = Foundation.TimeInterval

  • Undocumented

    Declaration

    Swift

    public typealias Time = Date
  • now

    Declaration

    Swift

    public var now: Date { get }

    Return Value

    Current time.

  • Constructs new SerialDispatchQueueScheduler with internal serial queue named internalSerialQueueName.

    Additional dispatch queue properties can be set after dispatch queue is created using serialQueueConfiguration.

    Declaration

    Swift

    public convenience init(internalSerialQueueName: String, serialQueueConfiguration: ((DispatchQueue) -> Void)? = nil, leeway: DispatchTimeInterval = DispatchTimeInterval.nanoseconds(0))

    Parameters

    internalSerialQueueName

    Name of internal serial dispatch queue.
    serialQueueConfiguration

    Additional configuration of internal serial dispatch queue.
    leeway

    The amount of time, in nanoseconds, that the system will defer the timer.

  • Constructs new SerialDispatchQueueScheduler named internalSerialQueueName that wraps queue.

    Declaration

    Swift

    public convenience init(queue: DispatchQueue, internalSerialQueueName: String, leeway: DispatchTimeInterval = DispatchTimeInterval.nanoseconds(0))

    Parameters

    queue

    Possibly concurrent dispatch queue used to perform work.
    internalSerialQueueName

    Name of internal serial dispatch queue proxy.
    leeway

    The amount of time, in nanoseconds, that the system will defer the timer.

  • Constructs new SerialDispatchQueueScheduler that wraps on of the global concurrent dispatch queues.

    Declaration

    Swift

    @available(iOS 8, OSX 10.10, *)
public convenience init(qos: DispatchQoS, internalSerialQueueName: String = "rx.global_dispatch_queue.serial", leeway: DispatchTimeInterval = DispatchTimeInterval.nanoseconds(0))

    Parameters

    qos

    Identifier for global dispatch queue with specified quality of service class.
    internalSerialQueueName

    Custom name for internal serial dispatch queue proxy.
    leeway

    The amount of time, in nanoseconds, that the system will defer the timer.

  • Schedules an action to be executed immediately.

    Declaration

    Swift

    public final func schedule<StateType>(_ state: StateType, action: @escaping (StateType) -> Disposable) -> Disposable

    Parameters

    state

    State passed to the action to be executed.
    action

    Action to be executed.

    Return Value

    The disposable object used to cancel the scheduled action (best effort).

  • Schedules an action to be executed.

    Declaration

    Swift

    public final func scheduleRelative<StateType>(_ state: StateType, dueTime: Foundation.TimeInterval, action: @escaping (StateType) -> Disposable) -> Disposable

    Parameters

    state

    State passed to the action to be executed.
    dueTime

    Relative time after which to execute the action.
    action

    Action to be executed.

    Return Value

    The disposable object used to cancel the scheduled action (best effort).

  • Schedules a periodic piece of work.

    Declaration

    Swift

    public func schedulePeriodic<StateType>(_ state: StateType, startAfter: TimeInterval, period: TimeInterval, action: @escaping (StateType) -> StateType) -> Disposable

    Parameters

    state

    State passed to the action to be executed.
    startAfter

    Period after which initial work should be run.
    period

    Period for running the work periodically.
    action

    Action to be executed.

    Return Value

    The disposable object used to cancel the scheduled action (best effort).