/// <summary>
/// Publishes an integration event using RabbitMQ basic publish
/// Uses default retry policy configured on app
/// </summary>
/// <typeparam name="TEvent">IntegrationEvent</typeparam>
/// <param name="event">Integration event to be published</param>
public void Publish <TEvent>(TEvent @event)
where TEvent : IntegrationEvent
{
if (!_connection.IsConnected)
{
_connection.TryConnect();
}
using (var channel = _connection.CreateModel())
{
channel.ExchangeDeclare(
exchange: EXCHANGE_NAME,
type: Enum.GetName(typeof(RabbitMQExchangeType), _exchangeType).ToLower());
var message = JsonConvert.SerializeObject(@event);
var body = Encoding.UTF8.GetBytes(message);
RabbitMQFactory.GetDefaultRetryPolicy(_logger, _retryCount)
.Execute((Action)(() =>
{
channel.BasicPublish(
exchange: EXCHANGE_NAME,
routingKey: @event.GetType().Name,
body: body);
}));
}
}
public bool TryConnect()
{
_logger.LogInformation("RabbitMQ Client is trying to connect");
lock (sync_root)
{
RabbitMQFactory.GetDefaultRetryPolicy(_logger, _retryCount)
.Execute(() => _connection = _connectionFactory.CreateConnection());
if (IsConnected)
{
_connection.ConnectionShutdown += OnConnectionShutdown;
_connection.CallbackException += OnCallbackException;
_connection.ConnectionBlocked += OnConnectionBlocked;
_logger.LogInformation($"RabbitMQ persistent connection acquired a connection {_connection.Endpoint.HostName} and is subscribed to failure events");
return(true);
}
else
{
_logger.LogCritical("FATAL ERROR: RabbitMQ connections could not be created and opened");
return(false);
}
}
}