/**
* 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.completable;
import java.util.concurrent.atomic.*;
import io.reactivex.*;
import io.reactivex.disposables.*;
import io.reactivex.plugins.
RxJavaPlugins;
public final class
CompletableMergeArray extends
Completable {
final
CompletableSource[]
sources;
public
CompletableMergeArray(
CompletableSource[]
sources) {
this.
sources =
sources;
}
@
Override
public void
subscribeActual(final
CompletableObserver observer) {
final
CompositeDisposable set = new
CompositeDisposable();
final
AtomicBoolean once = new
AtomicBoolean();
InnerCompletableObserver shared = new
InnerCompletableObserver(
observer,
once,
set,
sources.length + 1);
observer.
onSubscribe(
set);
for (
CompletableSource c :
sources) {
if (
set.
isDisposed()) {
return;
}
if (
c == null) {
set.
dispose();
NullPointerException npe = new
NullPointerException("A completable source is null");
shared.
onError(
npe);
return;
}
c.
subscribe(
shared);
}
shared.
onComplete();
}
static final class
InnerCompletableObserver extends
AtomicInteger implements
CompletableObserver {
private static final long
serialVersionUID = -8360547806504310570L;
final
CompletableObserver downstream;
final
AtomicBoolean once;
final
CompositeDisposable set;
InnerCompletableObserver(
CompletableObserver actual,
AtomicBoolean once,
CompositeDisposable set, int
n) {
this.
downstream =
actual;
this.
once =
once;
this.
set =
set;
this.
lazySet(
n);
}
@
Override
public void
onSubscribe(
Disposable d) {
set.
add(
d);
}
@
Override
public void
onError(
Throwable e) {
set.
dispose();
if (
once.
compareAndSet(false, true)) {
downstream.
onError(
e);
} else {
RxJavaPlugins.
onError(
e);
}
}
@
Override
public void
onComplete() {
if (
decrementAndGet() == 0) {
if (
once.
compareAndSet(false, true)) {
downstream.
onComplete();
}
}
}
}
}