@Override
public void onNext(T t) {
synchronized (this) {
if (emitting) {
List<T> q = queue;
if (q == null) {
q = new ArrayList<T>(4);
queue = q;
}
q.add(t);
return;
}
}
boolean skipFinal = false;
try {
child.onNext(t);
long r = requested;
if (r != Long.MAX_VALUE) {
requested = r - 1;
}
emitLoop();
skipFinal = true;
} finally {
if (!skipFinal) {
synchronized (this) {
emitting = false;
}
}
}
}
void subscribeNext() {
Observable<? extends T> t;
synchronized (guard) {
t = queue.peek();
if (t == null || active >= maxConcurrency) {
return;
}
active++;
queue.poll();
}
MergeItemSubscriber itemSub = new MergeItemSubscriber(SOURCE_INDEX.getAndIncrement(this));
subscribers.add(itemSub);
csub.add(itemSub);
WIP.incrementAndGet(this);
t.unsafeSubscribe(itemSub);
request(1);
}