2 * ============LICENSE_START=======================================================
3 * dcaegen2-collectors-veshv
4 * ================================================================================
5 * Copyright (C) 2018 NOKIA
6 * ================================================================================
7 * Licensed under the Apache License, Version 2.0 (the "License");
8 * you may not use this file except in compliance with the License.
9 * You may obtain a copy of the License at
11 * http://www.apache.org/licenses/LICENSE-2.0
13 * Unless required by applicable law or agreed to in writing, software
14 * distributed under the License is distributed on an "AS IS" BASIS,
15 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
16 * See the License for the specific language governing permissions and
17 * limitations under the License.
18 * ============LICENSE_END=========================================================
20 package org.onap.dcae.collectors.veshv.utils.arrow
22 import arrow.core.Either
23 import arrow.core.Left
24 import arrow.core.Right
25 import arrow.effects.IO
26 import org.reactivestreams.Publisher
27 import reactor.core.publisher.Flux
28 import reactor.core.publisher.Mono
29 import reactor.core.publisher.toMono
30 import kotlin.system.exitProcess
33 * @author Piotr Jaszczyk <piotr.jaszczyk@nokia.com>
37 sealed class ExitCode {
38 abstract val code: Int
45 object ExitSuccess : ExitCode() {
49 data class ExitFailure(override val code: Int) : ExitCode()
51 inline fun <A, B> Either<IO<A>, IO<B>>.unsafeRunEitherSync(onError: (Throwable) -> ExitCode, onSuccess: () -> Unit) =
52 flatten().attempt().unsafeRunSync().fold({ onError(it).io().unsafeRunSync() }, { onSuccess() })
54 fun IO<Any>.unit() = map { Unit }
56 fun <T> Mono<T>.asIo() = IO.async<T> { callback ->
64 fun <T> Publisher<T>.then(callback: () -> Unit): Mono<Unit> =
65 toMono().then(Mono.fromCallable(callback))
67 fun <T> Flux<IO<T>>.evaluateIo(): Flux<T> =
69 io.attempt().unsafeRunSync().fold(
70 { Flux.error<T>(it) },
75 inline fun <T> IO<T>.then(crossinline block: (T) -> Unit): IO<T> =