korolev.state.EnvConfigurator.scala Maven / Gradle / Ivy
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/*
* Copyright 2017-2018 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.state.EnvConfigurator.Env
import korolev.{Async, Context}
trait EnvConfigurator[F[_], S, M] {
def configure(access: Context.BaseAccess[F, S, M])
(implicit F: Async[F]): F[Env[F, M]]
}
object EnvConfigurator {
case class Env[F[_], M](onDestroy: () => F[Unit],
onMessage: PartialFunction[M, F[Unit]] = PartialFunction.empty)
def default[F[_], S, M]: EnvConfigurator[F, S, M] =
new DefaultEnvConfigurator
def apply[F[_], S, M](f: Context.BaseAccess[F, S, M] => F[Env[F, M]]): EnvConfigurator[F, S, M] =
new EnvConfigurator[F, S, M] {
override def configure(access: Context.BaseAccess[F, S, M])
(implicit F: Async[F]): F[Env[F, M]] =
f(access)
}
private class DefaultEnvConfigurator[F[_], S, M] extends EnvConfigurator[F, S, M] {
override def configure(access: Context.BaseAccess[F, S, M])
(implicit F: Async[F]): F[Env[F, M]] =
Async[F].delay(Env(onDestroy = () => Async[F].unit, PartialFunction.empty))
}
}