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.
/** * 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.flowable; import java.util.concurrent.TimeUnit; import java.util.concurrent.atomic.AtomicLong; import org.reactivestreams.*; import io.reactivex.*; import io.reactivex.Scheduler.Worker; import io.reactivex.disposables.Disposable; import io.reactivex.exceptions.MissingBackpressureException; import io.reactivex.internal.disposables.SequentialDisposable; import io.reactivex.internal.subscriptions.SubscriptionHelper; import io.reactivex.internal.util.BackpressureHelper; import io.reactivex.plugins.RxJavaPlugins; import io.reactivex.subscribers.SerializedSubscriber; public final class FlowableThrottleFirstTimed<T> extends AbstractFlowableWithUpstream<T, T> { final long timeout; final TimeUnit unit; final Scheduler scheduler; public FlowableThrottleFirstTimed(Flowable<T> source, long timeout, TimeUnit unit, Scheduler scheduler) { super(source); this.timeout = timeout; this.unit = unit; this.scheduler = scheduler; } @Override protected void subscribeActual(Subscriber<? super T> s) { source.subscribe(new DebounceTimedSubscriber<T>( new SerializedSubscriber<T>(s), timeout, unit, scheduler.createWorker())); } static final class DebounceTimedSubscriber<T> extends AtomicLong implements FlowableSubscriber<T>, Subscription, Runnable { private static final long serialVersionUID = -9102637559663639004L; final Subscriber<? super T> downstream; final long timeout; final TimeUnit unit; final Scheduler.Worker worker; Subscription upstream; final SequentialDisposable timer = new SequentialDisposable(); volatile boolean gate; boolean done; DebounceTimedSubscriber(Subscriber<? super T> actual, long timeout, TimeUnit unit, Worker worker) { this.downstream = actual; this.timeout = timeout; this.unit = unit; this.worker = worker; } @Override public void onSubscribe(Subscription s) { if (SubscriptionHelper.validate(this.upstream, s)) { this.upstream = s; downstream.onSubscribe(this); s.request(Long.MAX_VALUE); } } @Override public void onNext(T t) { if (done) { return; } if (!gate) { gate = true; long r = get(); if (r != 0L) { downstream.onNext(t); BackpressureHelper.produced(this, 1); } else { done = true; cancel(); downstream.onError(new MissingBackpressureException("Could not deliver value due to lack of requests")); return; } Disposable d = timer.get(); if (d != null) { d.dispose(); } timer.replace(worker.schedule(this, timeout, unit)); } } @Override public void run() { gate = false; } @Override public void onError(Throwable t) { if (done) { RxJavaPlugins.onError(t); return; } done = true; downstream.onError(t); worker.dispose(); } @Override public void onComplete() { if (done) { return; } done = true; downstream.onComplete(); worker.dispose(); } @Override public void request(long n) { if (SubscriptionHelper.validate(n)) { BackpressureHelper.add(this, n); } } @Override public void cancel() { upstream.cancel(); worker.dispose(); } } }