@Override
void request(AbstractRequestBodyPublisher publisher, long n) {
if (BackpressureUtils.checkRequest(n, publisher.subscriber)) {
BackpressureUtils.addAndGet(publisher.demand, n);
if (publisher.changeState(this, DEMAND)) {
publisher.checkOnDataAvailable();
}
}
}
@Override
void subscribe(
AbstractRequestBodyPublisher publisher, Subscriber<? super DataBuffer> subscriber) {
Objects.requireNonNull(subscriber);
if (publisher.changeState(this, NO_DEMAND)) {
Subscription subscription = new RequestBodySubscription(publisher);
publisher.subscriber = subscriber;
subscriber.onSubscribe(subscription);
} else {
throw new IllegalStateException(toString());
}
}
void onError(AbstractRequestBodyPublisher publisher, Throwable t) {
if (publisher.changeState(this, COMPLETED)) {
if (publisher.subscriber != null) {
publisher.subscriber.onError(t);
}
}
}
void onAllDataRead(AbstractRequestBodyPublisher publisher) {
if (publisher.changeState(this, COMPLETED)) {
if (publisher.subscriber != null) {
publisher.subscriber.onComplete();
}
}
}
@Override
void onDataAvailable(AbstractRequestBodyPublisher publisher) {
if (publisher.changeState(this, READING)) {
try {
boolean demandAvailable = publisher.readAndPublish();
if (demandAvailable) {
publisher.changeState(READING, DEMAND);
publisher.checkOnDataAvailable();
} else {
publisher.changeState(READING, NO_DEMAND);
}
} catch (IOException ex) {
publisher.onError(ex);
}
}
}
void cancel(AbstractRequestBodyPublisher publisher) {
publisher.changeState(this, COMPLETED);
}