@Override
public void next(Object value) {
if (value == null) {
fail(new NullPointerException("value is null"));
return;
}
if (done) {
Exceptions.onNextDropped(value);
return;
}
if (caughtUp && actual != null) {
try {
actual.onNext(value);
} finally {
ch.read();
ReferenceCountUtil.release(value);
}
} else {
Queue<Object> q = queue;
if (q == null) {
q = QueueSupplier.unbounded().get();
queue = q;
}
q.offer(value);
if (drain()) {
caughtUp = true;
}
}
}
/** Resumes the underlying packet reader. */
private void resume() {
mChannel.config().setAutoRead(true);
mChannel.read();
}
boolean drain() {
if (wip++ != 0) {
return false;
}
int missed = 1;
for (; ; ) {
final Queue<Object> q = queue;
final Subscriber<? super Object> a = actual;
if (a == null) {
return false;
}
long r = requested;
long e = 0L;
while (e != r) {
if (isCancelled()) {
return false;
}
boolean d = done;
Object v = q != null ? q.poll() : null;
boolean empty = v == null;
if (d && empty) {
cancelResource();
if (q != null) {
q.clear();
}
Throwable ex = error;
if (ex != null) {
a.onError(ex);
} else {
a.onComplete();
}
return false;
}
if (empty) {
ch.read();
break;
}
try {
a.onNext(v);
} finally {
ReferenceCountUtil.release(v);
ch.read();
}
e++;
}
if (e == r) {
if (isCancelled()) {
return false;
}
if (done && (q == null || q.isEmpty())) {
cancelResource();
if (q != null) {
q.clear();
}
Throwable ex = error;
if (ex != null) {
a.onError(ex);
} else {
a.onComplete();
}
return false;
}
}
if (e != 0L) {
if (r != Long.MAX_VALUE) {
if ((requested -= e) > 0L) {
ch.read();
}
}
}
missed = (wip = wip - missed);
if (missed == 0) {
if (r == Long.MAX_VALUE) {
ch.config().setAutoRead(true);
ch.read();
return true;
}
return false;
}
}
}
