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/**
 * Copyright (c) 2016-present, RxJava Contributors.
 *
 * 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 io.reactivex.internal.operators.maybe;

import java.util.concurrent.atomic.AtomicInteger;

import io.reactivex.*;
import io.reactivex.disposables.Disposable;
import io.reactivex.exceptions.Exceptions;
import io.reactivex.functions.Action;
import io.reactivex.internal.disposables.DisposableHelper;
import io.reactivex.plugins.RxJavaPlugins;

/**
 * Execute an action after an onSuccess, onError, onComplete or a dispose event.
 * 

History: 2.0.1 - experimental * @param the value type * @since 2.1 */ public final class MaybeDoFinally extends AbstractMaybeWithUpstream { final Action onFinally; public MaybeDoFinally(MaybeSource source, Action onFinally) { super(source); this.onFinally = onFinally; } @Override protected void subscribeActual(MaybeObserver observer) { source.subscribe(new DoFinallyObserver(observer, onFinally)); } static final class DoFinallyObserver extends AtomicInteger implements MaybeObserver, Disposable { private static final long serialVersionUID = 4109457741734051389L; final MaybeObserver downstream; final Action onFinally; Disposable upstream; DoFinallyObserver(MaybeObserver actual, Action onFinally) { this.downstream = actual; this.onFinally = onFinally; } @Override public void onSubscribe(Disposable d) { if (DisposableHelper.validate(this.upstream, d)) { this.upstream = d; downstream.onSubscribe(this); } } @Override public void onSuccess(T t) { downstream.onSuccess(t); runFinally(); } @Override public void onError(Throwable t) { downstream.onError(t); runFinally(); } @Override public void onComplete() { downstream.onComplete(); runFinally(); } @Override public void dispose() { upstream.dispose(); runFinally(); } @Override public boolean isDisposed() { return upstream.isDisposed(); } void runFinally() { if (compareAndSet(0, 1)) { try { onFinally.run(); } catch (Throwable ex) { Exceptions.throwIfFatal(ex); RxJavaPlugins.onError(ex); } } } } }





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