internal void Subscribe(Type mType, Type hType)
{
var attributes = mType.GetCustomAttributes(typeof(EventBusAttribute), true);
var channel = RabbitMqCore.Connection.CreateModel();
foreach (var attribute in attributes)
{
if (attribute is EventBusAttribute option)
{
RabbitMqCore.BuildContext(channel, option);
RabbitMqCore.DeadLetter(channel, option);
channel.BasicQos(0, 1, false);
EventingBasicConsumer consumer = new EventingBasicConsumer(channel);
consumer.Received += async(model, ea) =>
{
long attempts = RabbitMqCore.GetAttempts(ea.BasicProperties.Headers);
string body = Encoding.UTF8.GetString(ea.Body);
try
{
if (attempts > option.Retry)
{
throw new AccessViolationException("Number of attempts exceeded.");
}
await RabbitMqCore.ProcessEvent(body, mType, hType, ea);
channel.BasicAck(ea.DeliveryTag, multiple: false);
}
catch (AccessViolationException)
{
channel.BasicReject(ea.DeliveryTag, option.RejectRequeue);
}
catch (Exception)
{
channel.BasicNack(ea.DeliveryTag, false, false);
}
};
channel.BasicConsume(option.Queue,
autoAck: false,
consumer: consumer);
}
}
}
public void Publish <TMessage>(TMessage message)
{
using (var channel = RabbitMqCore.Connection.CreateModel())
{
var option = EventBusAttribute.Parse(typeof(TMessage));
var body = message.Serialize().GetBytes();
RabbitMqCore.BuildContext(channel, option);
RabbitMqCore.DeadLetter(channel, option);
IBasicProperties properties = channel.CreateBasicProperties();
properties.DeliveryMode = option.DeliveryMode;
channel.BasicPublish(option.Exchange,
option.RoutingKey,
option.Mandatory,
properties,
body);
}
}
