korolev.state.StateManager.scala Maven / Gradle / Ivy
/*
* Copyright 2017-2020 Aleksey Fomkin
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package korolev.state
import korolev.effect.Effect
import levsha.Id
abstract class StateManager[F[_]: Effect] { self =>
def snapshot: F[StateManager.Snapshot]
def read[T: StateDeserializer](nodeId: Id): F[Option[T]]
def delete(nodeId: Id): F[Unit]
def write[T: StateSerializer](nodeId: Id, value: T): F[Unit]
}
object StateManager {
trait Snapshot {
def apply[T: StateDeserializer](nodeId: Id): Option[T]
}
}