io.reactivex.internal.operators.flowable.FlowableDoFinally Maven / Gradle / Ivy
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/**
* 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 org.reactivestreams.*;
import io.reactivex.*;
import io.reactivex.annotations.*;
import io.reactivex.exceptions.Exceptions;
import io.reactivex.functions.Action;
import io.reactivex.internal.fuseable.*;
import io.reactivex.internal.subscriptions.*;
import io.reactivex.plugins.RxJavaPlugins;
/**
* Execute an action after an onError, onComplete or a cancel event.
* History: 2.0.1 - experimental
* @param the value type
* @since 2.1
*/
public final class FlowableDoFinally extends AbstractFlowableWithUpstream {
final Action onFinally;
public FlowableDoFinally(Flowable source, Action onFinally) {
super(source);
this.onFinally = onFinally;
}
@Override
protected void subscribeActual(Subscriber s) {
if (s instanceof ConditionalSubscriber) {
source.subscribe(new DoFinallyConditionalSubscriber((ConditionalSubscriber)s, onFinally));
} else {
source.subscribe(new DoFinallySubscriber(s, onFinally));
}
}
static final class DoFinallySubscriber extends BasicIntQueueSubscription implements FlowableSubscriber {
private static final long serialVersionUID = 4109457741734051389L;
final Subscriber downstream;
final Action onFinally;
Subscription upstream;
QueueSubscription qs;
boolean syncFused;
DoFinallySubscriber(Subscriber actual, Action onFinally) {
this.downstream = actual;
this.onFinally = onFinally;
}
@SuppressWarnings("unchecked")
@Override
public void onSubscribe(Subscription s) {
if (SubscriptionHelper.validate(this.upstream, s)) {
this.upstream = s;
if (s instanceof QueueSubscription) {
this.qs = (QueueSubscription)s;
}
downstream.onSubscribe(this);
}
}
@Override
public void onNext(T t) {
downstream.onNext(t);
}
@Override
public void onError(Throwable t) {
downstream.onError(t);
runFinally();
}
@Override
public void onComplete() {
downstream.onComplete();
runFinally();
}
@Override
public void cancel() {
upstream.cancel();
runFinally();
}
@Override
public void request(long n) {
upstream.request(n);
}
@Override
public int requestFusion(int mode) {
QueueSubscription qs = this.qs;
if (qs != null && (mode & BOUNDARY) == 0) {
int m = qs.requestFusion(mode);
if (m != NONE) {
syncFused = m == SYNC;
}
return m;
}
return NONE;
}
@Override
public void clear() {
qs.clear();
}
@Override
public boolean isEmpty() {
return qs.isEmpty();
}
@Nullable
@Override
public T poll() throws Exception {
T v = qs.poll();
if (v == null && syncFused) {
runFinally();
}
return v;
}
void runFinally() {
if (compareAndSet(0, 1)) {
try {
onFinally.run();
} catch (Throwable ex) {
Exceptions.throwIfFatal(ex);
RxJavaPlugins.onError(ex);
}
}
}
}
static final class DoFinallyConditionalSubscriber extends BasicIntQueueSubscription implements ConditionalSubscriber {
private static final long serialVersionUID = 4109457741734051389L;
final ConditionalSubscriber downstream;
final Action onFinally;
Subscription upstream;
QueueSubscription qs;
boolean syncFused;
DoFinallyConditionalSubscriber(ConditionalSubscriber actual, Action onFinally) {
this.downstream = actual;
this.onFinally = onFinally;
}
@SuppressWarnings("unchecked")
@Override
public void onSubscribe(Subscription s) {
if (SubscriptionHelper.validate(this.upstream, s)) {
this.upstream = s;
if (s instanceof QueueSubscription) {
this.qs = (QueueSubscription)s;
}
downstream.onSubscribe(this);
}
}
@Override
public void onNext(T t) {
downstream.onNext(t);
}
@Override
public boolean tryOnNext(T t) {
return downstream.tryOnNext(t);
}
@Override
public void onError(Throwable t) {
downstream.onError(t);
runFinally();
}
@Override
public void onComplete() {
downstream.onComplete();
runFinally();
}
@Override
public void cancel() {
upstream.cancel();
runFinally();
}
@Override
public void request(long n) {
upstream.request(n);
}
@Override
public int requestFusion(int mode) {
QueueSubscription qs = this.qs;
if (qs != null && (mode & BOUNDARY) == 0) {
int m = qs.requestFusion(mode);
if (m != NONE) {
syncFused = m == SYNC;
}
return m;
}
return NONE;
}
@Override
public void clear() {
qs.clear();
}
@Override
public boolean isEmpty() {
return qs.isEmpty();
}
@Nullable
@Override
public T poll() throws Exception {
T v = qs.poll();
if (v == null && syncFused) {
runFinally();
}
return v;
}
void runFinally() {
if (compareAndSet(0, 1)) {
try {
onFinally.run();
} catch (Throwable ex) {
Exceptions.throwIfFatal(ex);
RxJavaPlugins.onError(ex);
}
}
}
}
}