/*
* Copyright (c) 2011-2017 Pivotal Software Inc, 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
*
* 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 reactor.core.publisher;
import java.util.
Objects;
import java.util.concurrent.
RejectedExecutionException;
import java.util.concurrent.atomic.
AtomicIntegerFieldUpdater;
import org.reactivestreams.
Subscription;
import reactor.core.
CoreSubscriber;
import reactor.core.scheduler.
Scheduler;
import reactor.util.annotation.
Nullable;
final class
FluxCancelOn<T> extends
FluxOperator<T, T> {
final
Scheduler scheduler;
public
FluxCancelOn(
Flux<T>
source,
Scheduler scheduler) {
super(
source);
this.
scheduler =
Objects.
requireNonNull(
scheduler, "scheduler");
}
@
Override
public void
subscribe(
CoreSubscriber<? super T>
actual) {
source.
subscribe(new
CancelSubscriber<T>(
actual,
scheduler));
}
@
Override
public
Object scanUnsafe(
Attr key) {
if (
key ==
Attr.
RUN_ON) return
scheduler;
return super.scanUnsafe(
key);
}
static final class
CancelSubscriber<T>
implements
InnerOperator<T, T>,
Runnable {
final
CoreSubscriber<? super T>
actual;
final
Scheduler scheduler;
Subscription s;
volatile int
cancelled = 0;
static final
AtomicIntegerFieldUpdater<
CancelSubscriber>
CANCELLED =
AtomicIntegerFieldUpdater.
newUpdater(
CancelSubscriber.class, "cancelled");
CancelSubscriber(
CoreSubscriber<? super T>
actual,
Scheduler scheduler) {
this.
actual =
actual;
this.
scheduler =
scheduler;
}
@
Override
public void
onSubscribe(
Subscription s) {
if (
Operators.
validate(this.
s,
s)) {
this.
s =
s;
actual.
onSubscribe(this);
}
}
@
Override
@
Nullable
public
Object scanUnsafe(
Attr key) {
if (
key ==
Attr.
PARENT) return
s;
if (
key ==
Attr.
CANCELLED) return
cancelled == 1;
if (
key ==
Attr.
RUN_ON) return
scheduler;
return
InnerOperator.super.scanUnsafe(
key);
}
@
Override
public
CoreSubscriber<? super T>
actual() {
return
actual;
}
@
Override
public void
run() {
s.
cancel();
}
@
Override
public void
onNext(T
t) {
actual.
onNext(
t);
}
@
Override
public void
onError(
Throwable t) {
actual.
onError(
t);
}
@
Override
public void
onComplete() {
actual.
onComplete();
}
@
Override
public void
request(long
n) {
s.
request(
n);
}
@
Override
public void
cancel() {
if (
CANCELLED.
compareAndSet(this, 0, 1)) {
try {
scheduler.
schedule(this);
}
catch (
RejectedExecutionException ree) {
throw
Operators.
onRejectedExecution(
ree,
actual.
currentContext());
}
}
}
}
}