/
UseCase.kt
40 lines (35 loc) 路 1.68 KB
/
UseCase.kt
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/*
* Copyright (c) 2018. Andr茅 Mion
*
* 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 com.andremion.domain
import io.reactivex.Observable
/**
* A base class for an use case that will be executed by presentation layer
*/
abstract class UseCase<in Params, Result> internal constructor(private val schedulers: Schedulers) {
internal abstract fun buildObservable(params: Params?): Observable<Result>
fun execute(params: Params? = null): Observable<Result> {
return buildObservable(params)
.subscribeOn(schedulers.subscribeOn)
// Unfortunately RxJava had a bug that if any Exceptions were being thrown later
// in the stream they would incorrectly cut ahead of the successful emissions
// and break the flow.
// In order to fix this, an overload was added in version 1.1.1
// for observeOn(Scheduler scheduler, boolean delayError)
// in order to signal the Scheduler to respect the delaying of errors.
// https://medium.com/yammer-engineering/chaining-multiple-sources-with-rxjava-20eb6850e5d9
.observeOn(schedulers.observeOn, true)
}
}