/// <summary>
/// Create Producer to publish messages.
/// </summary>
/// <exception cref="BrokerFactoryException"></exception>
/// <exception cref="ArgumentNullException"></exception>
/// <exception cref="ArgumentException"></exception>
/// <exception cref="ArgumentOutOfRangeException"></exception>
public Task <IProducer <T> > CreateProducerAsync <T>(CancellationToken cancelToken = default) where T : class
{
MessageSettingsAttribute msgSettings = getAndValidateSettingsFor <T>();
try
{
// --> Create: Model.
IModel model = _lazyConnection.Value.CreateModel();
// Create the requested exchange.
if (!_factoryConfiguration.SkipManagement)
{
model.ExchangeDeclare(msgSettings.ExchangeName, msgSettings.ExchangeType.ToString().ToLower(), true);
}
model.ConfirmSelect();
// --> Create: Producer.
IProducer <T> producer = new Producer <T>(model, msgSettings.ExchangeName, msgSettings.RouteKey, msgSettings.DeliveryMode);
return(Task.FromResult(producer));
}
catch (Exception ex)
{
throw new BrokerFactoryException("Failed to create Producer.", ex);
}
}
/// <summary>
/// Create Consumer to consume messages.
/// </summary>
/// <exception cref="BrokerFactoryException"></exception>
/// <exception cref="ArgumentNullException"></exception>
/// <exception cref="ArgumentException"></exception>
/// <exception cref="ArgumentOutOfRangeException"></exception>
public Task <IConsumer <T> > CreateConsumerAsync <T>(CancellationToken cancelToken = default) where T : class
{
MessageSettingsAttribute msgSettings = getAndValidateSettingsFor <T>();
try
{
// --> Create: Model.
IModel model = _lazyConnection.Value.CreateModel();
if (!_factoryConfiguration.SkipManagement)
{
// --> Initialize: DeadLetterQueue and DeadLetterExchange.
string deadLetterQueue = _factoryConfiguration.DefaultDeadLetterQueue;
if (!string.IsNullOrWhiteSpace(msgSettings.DeadLetterQueue))
{
deadLetterQueue = msgSettings.DeadLetterQueue;
}
model.QueueDeclare(deadLetterQueue, true, false, false);
model.ExchangeDeclare(_factoryConfiguration.DefaultDeadLetterExchange, ExchangeType.Direct.ToString().ToLower(), true);
model.QueueBind(deadLetterQueue, _factoryConfiguration.DefaultDeadLetterExchange, msgSettings.QueueName);
// --> Initialize: The requested Queue.
Dictionary <string, object> declareArguments = new Dictionary <string, object>
{
["x-dead-letter-exchange"] = _factoryConfiguration.DefaultDeadLetterExchange,
["x-dead-letter-routing-key"] = msgSettings.QueueName
};
model.QueueDeclare(msgSettings.QueueName, true, false, false, declareArguments);
// Create: Exchange and bind it with the queue.
model.ExchangeDeclare(msgSettings.ExchangeName, msgSettings.ExchangeType.ToString().ToLower(), true);
model.QueueBind(msgSettings.QueueName, msgSettings.ExchangeName, msgSettings.RouteKey ?? string.Empty);
}
// --> Create: Consumer.
IConsumer <T> consumer = new Consumer <T>(model, msgSettings.QueueName, msgSettings.PrefetchCount);
return(Task.FromResult(consumer));
}
catch (Exception ex)
{
throw new BrokerFactoryException("Failed to create Consumer.", ex);
}
}
