Microsoft.AspNetCore.SignalR.Messaging.ScaleoutStream.Send C# (CSharp) Method

        public Task Send(Func<object, Task> send, object state)
        {
            lock (_lockObj)
            {
                if (_error != null)
                {
                    throw _error;
                }

                // If the queue is closed then stop sending
                if (_state == StreamState.Closed)
                {
                    throw new InvalidOperationException(Resources.Error_StreamClosed);
                }

                var context = new SendContext(this, send, state);

                if (_initializeDrainTask != null && !_initializeDrainTask.IsCompleted)
                {
                    // Wait on the draining of the queue before proceeding with the send
                    // NOTE: Calling .Wait() here is safe because the task wasn't created on an ASP.NET request thread
                    //       and thus has no captured sync context
                    _initializeDrainTask.Wait();
                }

                if (UsingTaskQueue)
                {
                    Task task = _queue.Enqueue(Send, context);

                    if (task == null)
                    {
                        // The task is null if the queue is full
                        throw new InvalidOperationException(Resources.Error_TaskQueueFull);
                    }

                    // Always observe the task in case the user doesn't handle it
                    return task.Catch(_logger);
                }

                return Send(context);
            }
        }