io.reactivex.rxjava3.internal.subscribers.StrictSubscriber Maven / Gradle / Ivy
Go to download
Show more of this group Show more artifacts with this name
Show all versions of redisson-all Show documentation
Show all versions of redisson-all Show documentation
Easy Redis Java client and Real-Time Data Platform. Valkey compatible. Sync/Async/RxJava3/Reactive API. Client side caching. Over 50 Redis based Java objects and services: JCache API, Apache Tomcat, Hibernate, Spring, Set, Multimap, SortedSet, Map, List, Queue, Deque, Semaphore, Lock, AtomicLong, Map Reduce, Bloom filter, Scheduler, RPC
/*
* 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.subscribers;
import java.util.concurrent.atomic.*;
import org.reactivestreams.*;
import io.reactivex.rxjava3.core.FlowableSubscriber;
import io.reactivex.rxjava3.internal.subscriptions.SubscriptionHelper;
import io.reactivex.rxjava3.internal.util.*;
/**
* Ensures that the event flow between the upstream and downstream follow
* the Reactive-Streams 1.0 specification by honoring the 3 additional rules
* (which are omitted in standard operators due to performance reasons).
*
* - §1.3: onNext should not be called concurrently until onSubscribe returns
* - §2.3: onError or onComplete must not call cancel
* - §3.9: negative requests should emit an onError(IllegalArgumentException)
*
* In addition, if rule §2.12 (onSubscribe must be called at most once) is violated,
* the sequence is cancelled an onError(IllegalStateException) is emitted.
* @param the value type
* @since 2.0.7
*/
public class StrictSubscriber
extends AtomicInteger
implements FlowableSubscriber, Subscription {
private static final long serialVersionUID = -4945028590049415624L;
final Subscriber super T> downstream;
final AtomicThrowable error;
final AtomicLong requested;
final AtomicReference upstream;
final AtomicBoolean once;
volatile boolean done;
public StrictSubscriber(Subscriber super T> downstream) {
this.downstream = downstream;
this.error = new AtomicThrowable();
this.requested = new AtomicLong();
this.upstream = new AtomicReference<>();
this.once = new AtomicBoolean();
}
@Override
public void request(long n) {
if (n <= 0) {
cancel();
onError(new IllegalArgumentException("§3.9 violated: positive request amount required but it was " + n));
} else {
SubscriptionHelper.deferredRequest(upstream, requested, n);
}
}
@Override
public void cancel() {
if (!done) {
SubscriptionHelper.cancel(upstream);
}
}
@Override
public void onSubscribe(Subscription s) {
if (once.compareAndSet(false, true)) {
downstream.onSubscribe(this);
SubscriptionHelper.deferredSetOnce(this.upstream, requested, s);
} else {
s.cancel();
cancel();
onError(new IllegalStateException("§2.12 violated: onSubscribe must be called at most once"));
}
}
@Override
public void onNext(T t) {
HalfSerializer.onNext(downstream, t, this, error);
}
@Override
public void onError(Throwable t) {
done = true;
HalfSerializer.onError(downstream, t, this, error);
}
@Override
public void onComplete() {
done = true;
HalfSerializer.onComplete(downstream, this, error);
}
}
© 2015 - 2024 Weber Informatics LLC | Privacy Policy