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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) 2016-2021 VMware Inc. or its affiliates, All Rights Reserved.
*
* 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
*
* https://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 reactor.core.publisher;
import java.util.Objects;
import java.util.function.Predicate;
import org.reactivestreams.Subscription;
import reactor.core.CoreSubscriber;
import reactor.core.Fuseable.ConditionalSubscriber;
import reactor.util.annotation.Nullable;
import reactor.util.context.Context;
/**
* Skips source values until a predicate returns
* true for the value.
*
* @param the value type
* @see Reactive-Streams-Commons
*/
final class FluxSkipUntil extends InternalFluxOperator {
final Predicate super T> predicate;
FluxSkipUntil(Flux extends T> source, Predicate super T> predicate) {
super(source);
this.predicate = Objects.requireNonNull(predicate, "predicate");
}
@Override
public CoreSubscriber super T> subscribeOrReturn(CoreSubscriber super T> actual) {
return new SkipUntilSubscriber<>(actual, predicate);
}
@Override
public Object scanUnsafe(Attr key) {
if (key == Attr.RUN_STYLE) return Attr.RunStyle.SYNC;
return super.scanUnsafe(key);
}
static final class SkipUntilSubscriber
implements ConditionalSubscriber, InnerOperator {
final CoreSubscriber super T> actual;
final Context ctx;
final Predicate super T> predicate;
Subscription s;
boolean done;
boolean doneSkipping;
SkipUntilSubscriber(CoreSubscriber super T> actual, Predicate super T> predicate) {
this.actual = actual;
this.ctx = actual.currentContext();
this.predicate = predicate;
}
@Override
public void onSubscribe(Subscription s) {
if (Operators.validate(this.s, s)) {
this.s = s;
actual.onSubscribe(this);
}
}
@Override
public void onNext(T t) {
if (done) {
Operators.onNextDropped(t, ctx);
return;
}
if (doneSkipping){
actual.onNext(t);
return;
}
boolean b;
try {
b = predicate.test(t);
} catch (Throwable e) {
onError(Operators.onOperatorError(s, e, t, ctx));
return;
}
if (b) {
doneSkipping = true;
actual.onNext(t);
return;
}
Operators.onDiscard(t, ctx);
s.request(1);
}
@Override
public boolean tryOnNext(T t) {
if (done) {
Operators.onNextDropped(t, ctx);
return true;
}
if (doneSkipping) {
actual.onNext(t);
return true;
}
boolean b;
try {
b = predicate.test(t);
}
catch (Throwable e) {
onError(Operators.onOperatorError(s, e, t, ctx));
return true;
}
if (b) {
doneSkipping = true;
actual.onNext(t);
return true;
}
Operators.onDiscard(t, ctx);
return false;
}
@Override
public void onError(Throwable t) {
if (done) {
Operators.onErrorDropped(t, ctx);
return;
}
done = true;
actual.onError(t);
}
@Override
public void onComplete() {
if (done) {
return;
}
done = true;
actual.onComplete();
}
@Override
@Nullable
public Object scanUnsafe(Attr key) {
if (key == Attr.PARENT) return s;
if (key == Attr.TERMINATED) return done;
if (key == Attr.RUN_STYLE) return Attr.RunStyle.SYNC;
return InnerOperator.super.scanUnsafe(key);
}
@Override
public CoreSubscriber super T> actual() {
return actual;
}
@Override
public void request(long n) {
s.request(n);
}
@Override
public void cancel() {
s.cancel();
}
}
}
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