/// <summary>
///
/// </summary>
/// <param name="stoppingToken"></param>
/// <returns></returns>
protected override Task ExecuteAsync(CancellationToken stoppingToken)
{
using var scope = _serviceScopeFactory.CreateScope();
var channel = scope.ServiceProvider.GetRequiredService <RabbitMqConnectionFactory>().Channel();
var exchangeName = scope.ServiceProvider.GetRequiredService <IOptions <RabbitMqConfigParams> >().Value.ExchangeName;
var retryDomainEventExchange = RabbitMqExchangeNameFormatter.Retry(exchangeName);
var deadLetterDomainEventExchange = RabbitMqExchangeNameFormatter.DeadLetter(exchangeName);
channel.ExchangeDeclare(exchangeName, ExchangeType.Topic);
channel.ExchangeDeclare(retryDomainEventExchange, ExchangeType.Topic);
channel.ExchangeDeclare(deadLetterDomainEventExchange, ExchangeType.Topic);
foreach (var subscriberInformation in DomainEventSubscriberInformationService.All())
{
var domainEventsQueueName = RabbitMqQueueNameFormatter.Format(subscriberInformation);
var retryQueueName = RabbitMqQueueNameFormatter.FormatRetry(subscriberInformation);
var deadLetterQueueName = RabbitMqQueueNameFormatter.FormatDeadLetter(subscriberInformation);
var subscribedEvent = EventNameSubscribed(subscriberInformation);
var queue = channel.QueueDeclare(domainEventsQueueName, true, false, false);
var retryQueue = channel.QueueDeclare(retryQueueName, true, false, false,
RetryQueueArguments(exchangeName, domainEventsQueueName));
var deadLetterQueue = channel.QueueDeclare(deadLetterQueueName, true, false, false);
channel.QueueBind(queue, exchangeName, domainEventsQueueName);
channel.QueueBind(retryQueue, retryDomainEventExchange, domainEventsQueueName);
channel.QueueBind(deadLetterQueue, deadLetterDomainEventExchange, domainEventsQueueName);
channel.QueueBind(queue, exchangeName, subscribedEvent);
}
return(scope.ServiceProvider.GetRequiredService <RabbitMqDomainEventsConsumer>().Consume());
}
private void SendToDeadLetter(BasicDeliverEventArgs ea, string queue)
{
SendMessageTo(RabbitMqExchangeNameFormatter.DeadLetter(_rabbitMqParams.Value.ExchangeName), ea, queue);
}
