rx.internal.operators.CompletableOnSubscribeMergeDelayErrorIterable Maven / Gradle / Ivy
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/**
* Copyright 2014 Netflix, Inc.
*
* 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 rx.internal.operators;
import java.util.*;
import java.util.concurrent.atomic.AtomicInteger;
import rx.*;
import rx.Completable.OnSubscribe;
import rx.internal.util.atomic.MpscLinkedAtomicQueue;
import rx.internal.util.unsafe.*;
import rx.subscriptions.CompositeSubscription;
public final class CompletableOnSubscribeMergeDelayErrorIterable implements OnSubscribe {
final Iterable sources;
public CompletableOnSubscribeMergeDelayErrorIterable(Iterable sources) {
this.sources = sources;
}
@Override
public void call(final CompletableSubscriber s) {
final CompositeSubscription set = new CompositeSubscription();
s.onSubscribe(set);
Iterator iterator;
try {
iterator = sources.iterator();
} catch (Throwable e) {
s.onError(e);
return;
}
if (iterator == null) {
s.onError(new NullPointerException("The source iterator returned is null"));
return;
}
final AtomicInteger wip = new AtomicInteger(1);
final Queue queue;
if (UnsafeAccess.isUnsafeAvailable()) {
queue = new MpscLinkedQueue();
} else {
queue = new MpscLinkedAtomicQueue();
}
for (;;) {
if (set.isUnsubscribed()) {
return;
}
boolean b;
try {
b = iterator.hasNext();
} catch (Throwable e) {
queue.offer(e);
if (wip.decrementAndGet() == 0) {
if (queue.isEmpty()) {
s.onCompleted();
} else {
s.onError(CompletableOnSubscribeMerge.collectErrors(queue));
}
}
return;
}
if (!b) {
break;
}
if (set.isUnsubscribed()) {
return;
}
Completable c;
try {
c = iterator.next();
} catch (Throwable e) {
queue.offer(e);
if (wip.decrementAndGet() == 0) {
if (queue.isEmpty()) {
s.onCompleted();
} else {
s.onError(CompletableOnSubscribeMerge.collectErrors(queue));
}
}
return;
}
if (set.isUnsubscribed()) {
return;
}
if (c == null) {
NullPointerException e = new NullPointerException("A completable source is null");
queue.offer(e);
if (wip.decrementAndGet() == 0) {
if (queue.isEmpty()) {
s.onCompleted();
} else {
s.onError(CompletableOnSubscribeMerge.collectErrors(queue));
}
}
return;
}
wip.getAndIncrement();
c.unsafeSubscribe(new CompletableSubscriber() {
@Override
public void onSubscribe(Subscription d) {
set.add(d);
}
@Override
public void onError(Throwable e) {
queue.offer(e);
tryTerminate();
}
@Override
public void onCompleted() {
tryTerminate();
}
void tryTerminate() {
if (wip.decrementAndGet() == 0) {
if (queue.isEmpty()) {
s.onCompleted();
} else {
s.onError(CompletableOnSubscribeMerge.collectErrors(queue));
}
}
}
});
}
if (wip.decrementAndGet() == 0) {
if (queue.isEmpty()) {
s.onCompleted();
} else {
s.onError(CompletableOnSubscribeMerge.collectErrors(queue));
}
}
}
}