private async Task <string> SubscribeToReplyAsync(CancellationToken cancellationToken)
{
if (_replyQueue != null)
{
return(_replyQueue);
}
using (await _replyQueueLock.AcquireAsync(cancellationToken))
{
if (_replyQueue != null)
{
return(_replyQueue);
}
var replyQueue = $"toxon.micro.rpc.reply.{Guid.NewGuid()}";
var exchange = await _bus.ExchangeDeclareAsync(ReplyExchangeName, ExchangeType.Direct);
var queue = await _bus.QueueDeclareAsync(replyQueue);
await _bus.BindAsync(exchange, queue, replyQueue);
_bus.Consume(queue, (body, props, info) =>
{
var correlationIdString = props.CorrelationId;
if (Guid.TryParse(correlationIdString, out var correlationId) && _responseHandlers.TryRemove(correlationId, out var tcs))
{
tcs.SetResult(MessageHelpers.FromArgs(body, props));
}
});
_replyQueue = replyQueue;
return(_replyQueue);
}
}