public Task Publish <TEvent>(TEvent @event, string exchange, CancellationToken cancellationToken) where TEvent : IEvent
{
var policy = Policy.Handle <BrokerUnreachableException>()
.Or <SocketException>()
.WaitAndRetry(_options.PublishRetryCount,
retryAttempt => TimeSpan.FromSeconds(Math.Pow(2, retryAttempt)), (ex, _) =>
{
_logger.LogWarning(ex.ToString());
});
_connection.VerifyConnection();
exchange ??= _options.PublishExchange ?? _options.Exchanges.FirstOrDefault();
var channel = _connection.CreateModel();
channel.ExchangeDeclare(exchange: exchange, type: "direct");
var message = JsonSerializer.Serialize(@event);
var body = Encoding.UTF8.GetBytes(message);
var eventName = @event.GetType().Name;
policy.Execute(() =>
{
channel.BasicPublish(exchange, eventName, null, body);
});
return(Task.CompletedTask);
}
private IModel CreateConsumerChannel()
{
_connection.VerifyConnection();
var channel = _connection.CreateModel();
foreach (var exchange in _exchanges)
{
channel.ExchangeDeclare(exchange: exchange, type: "direct");
}
channel.QueueDeclare(queue: _queueName, durable: true, exclusive: false, autoDelete: false, arguments: null);
channel.CallbackException += (sender, ea) =>
{
_consumerChannel.Dispose();
_consumerChannel = CreateConsumerChannel();
};
return(channel);
}
