@Override
public void newStream(HeadersFrame frame, Promise<Stream> promise, Stream.Listener listener) {
// Synchronization is necessary to atomically create
// the stream id and enqueue the frame to be sent.
boolean queued;
synchronized (this) {
int streamId = frame.getStreamId();
if (streamId <= 0) {
streamId = streamIds.getAndAdd(2);
PriorityFrame priority = frame.getPriority();
priority =
priority == null
? null
: new PriorityFrame(
streamId,
priority.getParentStreamId(),
priority.getWeight(),
priority.isExclusive());
frame = new HeadersFrame(streamId, frame.getMetaData(), priority, frame.isEndStream());
}
final IStream stream = createLocalStream(streamId, promise);
if (stream == null) return;
stream.setListener(listener);
ControlEntry entry = new ControlEntry(frame, stream, new PromiseCallback<>(promise, stream));
queued = flusher.append(entry);
}
// Iterate outside the synchronized block.
if (queued) flusher.iterate();
}
@Override
public int priority(PriorityFrame frame, Callback callback) {
int streamId = frame.getStreamId();
IStream stream = streams.get(streamId);
if (stream == null) {
streamId = streamIds.getAndAdd(2);
frame =
new PriorityFrame(
streamId, frame.getParentStreamId(), frame.getWeight(), frame.isExclusive());
}
control(stream, callback, frame);
return streamId;
}