/*
* 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.function.
Function;
import org.reactivestreams.
Publisher;
import org.reactivestreams.
Subscription;
import reactor.core.
CoreSubscriber;
import reactor.core.
Exceptions;
/**
* Resumes the failed main sequence with another sequence returned by
* a function for the particular failure exception.
*
* @param <T> the value type
*
* @see <a href="https://github.com/reactor/reactive-streams-commons">Reactive-Streams-Commons</a>
*/
final class
FluxOnErrorResume<T> extends
FluxOperator<T, T> {
final
Function<? super
Throwable, ? extends
Publisher<? extends T>>
nextFactory;
FluxOnErrorResume(
Flux<? extends T>
source,
Function<? super
Throwable, ? extends
Publisher<? extends T>>
nextFactory) {
super(
source);
this.
nextFactory =
Objects.
requireNonNull(
nextFactory, "nextFactory");
}
@
Override
public void
subscribe(
CoreSubscriber<? super T>
actual) {
source.
subscribe(new
ResumeSubscriber<>(
actual,
nextFactory));
}
static final class
ResumeSubscriber<T>
extends
Operators.
MultiSubscriptionSubscriber<T, T> {
final
Function<? super
Throwable, ? extends
Publisher<? extends T>>
nextFactory;
boolean
second;
ResumeSubscriber(
CoreSubscriber<? super T>
actual,
Function<? super
Throwable, ? extends
Publisher<? extends T>>
nextFactory) {
super(
actual);
this.
nextFactory =
nextFactory;
}
@
Override
public void
onSubscribe(
Subscription s) {
if (!
second) {
actual.
onSubscribe(this);
}
set(
s);
}
@
Override
public void
onNext(T
t) {
actual.
onNext(
t);
if (!
second) {
producedOne();
}
}
@
Override
public void
onError(
Throwable t) {
if (!
second) {
second = true;
Publisher<? extends T>
p;
try {
p =
Objects.
requireNonNull(
nextFactory.
apply(
t),
"The nextFactory returned a null Publisher");
}
catch (
Throwable e) {
Throwable _e =
Operators.
onOperatorError(
e,
actual.
currentContext());
_e =
Exceptions.
addSuppressed(
_e,
t);
actual.
onError(
_e);
return;
}
p.
subscribe(this);
}
else {
actual.
onError(
t);
}
}
}
}