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Extension of Scala-STM, adding optional durability layer, and providing API for confluent and reactive event layers
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/*
* DummyEvent.scala
* (Lucre 4)
*
* Copyright (c) 2009-2024 Hanns Holger Rutz. All rights reserved.
*
* This software is published under the GNU Affero General Public License v3+
*
*
* For further information, please contact Hanns Holger Rutz at
* [email protected]
*/
package de.sciss.lucre
package impl
object DummyEvent {
/** This method is cheap. */
def apply[T <: Txn[T], A](): DummyEvent[T, A] = anyDummy.asInstanceOf[DummyEvent[T, A]]
private val anyDummy = new Impl[AnyTxn]
private final class Impl[T <: Txn[T]] extends DummyEvent[T, Any] {
override def toString = "event.Dummy"
}
private def opNotSupported = sys.error("Operation not supported")
}
trait DummyEvent[T <: Txn[T], +A] extends EventLike[T, A] {
import DummyEvent._
final def ---> (sink: Event[T, Any])(implicit tx: T): Unit = ()
final def -/-> (sink: Event[T, Any])(implicit tx: T): Unit = ()
final def react(fun: T => A => Unit)(implicit tx: T): Disposable[T] = Disposable.empty[T]
private[lucre] final def pullUpdate(pull: Pull[T])(implicit tx: T): Option[A] = opNotSupported
}
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