code: /*
   * 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.rxjava3.internal.operators.observable;
  
  import java.util.concurrent.atomic.*;
  
  import io.reactivex.rxjava3.core.*;
  import io.reactivex.rxjava3.disposables.Disposable;
  import io.reactivex.rxjava3.internal.disposables.DisposableHelper;
  import io.reactivex.rxjava3.internal.util.*;
  
  /**
   * Merges an Observable and a Completable by emitting the items of the Observable and waiting until
   * both the Observable and Completable complete normally.
   * <p>History: 2.1.10 - experimental
   * @param <T> the element type of the Observable
   * @since 2.2
   */
  public final class ObservableMergeWithCompletable<T> extends AbstractObservableWithUpstream<T, T> {
  
      final CompletableSource other;
  
      public ObservableMergeWithCompletable(Observable<T> source, CompletableSource other) {
          super(source);
          this.other = other;
      }
  
      @Override
      protected void subscribeActual(Observer<? super T> observer) {
          MergeWithObserver<T> parent = new MergeWithObserver<>(observer);
          observer.onSubscribe(parent);
          source.subscribe(parent);
          other.subscribe(parent.otherObserver);
      }
  
      static final class MergeWithObserver<T> extends AtomicInteger
      implements Observer<T>, Disposable {
  
          private static final long serialVersionUID = -4592979584110982903L;
  
          final Observer<? super T> downstream;
  
          final AtomicReference<Disposable> mainDisposable;
  
          final OtherObserver otherObserver;
  
          final AtomicThrowable errors;
  
          volatile boolean mainDone;
  
          volatile boolean otherDone;
  
          MergeWithObserver(Observer<? super T> downstream) {
              this.downstream = downstream;
              this.mainDisposable = new AtomicReference<>();
              this.otherObserver = new OtherObserver(this);
              this.errors = new AtomicThrowable();
          }
  
          @Override
          public void onSubscribe(Disposable d) {
              DisposableHelper.setOnce(mainDisposable, d);
          }
  
          @Override
          public void onNext(T t) {
              HalfSerializer.onNext(downstream, t, this, errors);
          }
  
          @Override
          public void onError(Throwable ex) {
              DisposableHelper.dispose(otherObserver);
              HalfSerializer.onError(downstream, ex, this, errors);
          }
  
          @Override
          public void onComplete() {
              mainDone = true;
              if (otherDone) {
                  HalfSerializer.onComplete(downstream, this, errors);
              }
          }
  
          @Override
          public boolean isDisposed() {
              return DisposableHelper.isDisposed(mainDisposable.get());
          }
  
          @Override
          public void dispose() {
              DisposableHelper.dispose(mainDisposable);
              DisposableHelper.dispose(otherObserver);
              errors.tryTerminateAndReport();
          }
  
          void otherError(Throwable ex) {
              DisposableHelper.dispose(mainDisposable);
              HalfSerializer.onError(downstream, ex, this, errors);
          }
  
          void otherComplete() {
              otherDone = true;
              if (mainDone) {
                  HalfSerializer.onComplete(downstream, this, errors);
              }
          }
  
          static final class OtherObserver extends AtomicReference<Disposable>
          implements CompletableObserver {
  
              private static final long serialVersionUID = -2935427570954647017L;
  
              final MergeWithObserver<?> parent;
  
              OtherObserver(MergeWithObserver<?> parent) {
                  this.parent = parent;
              }
  
              @Override
              public void onSubscribe(Disposable d) {
                  DisposableHelper.setOnce(this, d);
              }
  
              @Override
              public void onError(Throwable e) {
                  parent.otherError(e);
              }
  
              @Override
              public void onComplete() {
                  parent.otherComplete();
              }
          }
      }
  }
  