public ISubscription SubscribeAsync <T>(Func <T, TMessageContext, Task> subscribeMethod, SubscriptionConfiguration config)
{
var routingKey = _config.RouteWithGlobalId
? $"{config.RoutingKey}.#"
: config.RoutingKey;
var topologyTask = _topologyProvider.BindQueueAsync(config.Queue, config.Exchange, routingKey);
var channelTask = _channelFactory.CreateChannelAsync();
var subscriberTask = Task
.WhenAll(topologyTask, channelTask)
.ContinueWith(t =>
{
var consumer = _consumerFactory.CreateConsumer(config, channelTask.Result);
consumer.OnMessageAsync = (o, args) => _errorHandling.ExecuteAsync(() =>
{
var body = _serializer.Deserialize <T>(args.Body);
var context = _contextProvider.ExtractContext(args.BasicProperties.Headers[PropertyHeaders.Context]);
_contextEnhancer.WireUpContextFeatures(context, consumer, args);
return(subscribeMethod(body, context));
}, exception => _errorHandling.OnSubscriberExceptionAsync(consumer, config, args, exception));
consumer.Model.BasicConsume(config.Queue.FullQueueName, config.NoAck, consumer);
_logger.LogDebug($"Setting up a consumer on channel '{channelTask.Result.ChannelNumber}' for queue {config.Queue.QueueName} with NoAck set to {config.NoAck}.");
return(new Subscription(consumer, config.Queue.QueueName));
});
Task.WaitAll(subscriberTask);
_subscriptions.Add(subscriberTask.Result);
return(subscriberTask.Result);
}
public ISubscription RespondAsync <TRequest, TResponse>(Func <TRequest, TMessageContext, Task <TResponse> > onMessage, ResponderConfiguration cfg)
{
var routingKey = _config.RouteWithGlobalId ? $"{cfg.RoutingKey}.#" : cfg.RoutingKey;
var topologyTask = _topologyProvider.BindQueueAsync(cfg.Queue, cfg.Exchange, routingKey);
var channelTask = _channelFactory.CreateChannelAsync();
var respondTask = Task.WhenAll(topologyTask, channelTask)
.ContinueWith(t =>
{
if (topologyTask.IsFaulted)
{
throw topologyTask.Exception ?? new Exception("Topology Task Fauled");
}
var consumer = _consumerFactory.CreateConsumer(cfg, channelTask.Result);
consumer.OnMessageAsync = (o, args) => _errorHandling.ExecuteAsync(() =>
{
var body = _serializer.Deserialize <TRequest>(args.Body);
var context = _contextProvider.ExtractContext(args.BasicProperties.Headers[PropertyHeaders.Context]);
_contextEnhancer.WireUpContextFeatures(context, consumer, args);
return(onMessage(body, context)
.ContinueWith(tResponse =>
{
if (tResponse.IsFaulted)
{
throw tResponse.Exception ?? new Exception();
}
if (consumer.AcknowledgedTags.Contains(args.DeliveryTag))
{
return;
}
if (tResponse.Result == null)
{
return;
}
_logger.LogDebug($"Sending response to request with correlation '{args.BasicProperties.CorrelationId}'.");
consumer.Model.BasicPublish(
exchange: string.Empty,
routingKey: args.BasicProperties.ReplyTo,
basicProperties: _propertyProvider.GetProperties <TResponse>(p => p.CorrelationId = args.BasicProperties.CorrelationId),
body: _serializer.Serialize(tResponse.Result)
);
}));
}, exception => _errorHandling.OnResponseHandlerExceptionAsync(consumer, cfg, args, exception));
consumer.Model.BasicConsume(cfg.Queue.QueueName, cfg.NoAck, consumer);
return(new Subscription(consumer, cfg.Queue.QueueName));
});
Task.WaitAll(respondTask);
_subscriptions.Add(respondTask.Result);
return(respondTask.Result);
}
