public async Task PublishAsync(string topic, byte[] bytes)
{
if (bytes == null)
{
throw new ArgumentNullException(nameof(bytes));
}
if (!_connection.IsConnected)
{
_connection.TryConnect();
}
var policy = Policy.Handle <BrokerUnreachableException>()
.Or <SocketException>()
.WaitAndRetry(_options.RetryCount, retryAttempt => TimeSpan.FromSeconds(Math.Pow(2, retryAttempt)),
(ex, time) =>
{
_logger.LogWarning(ex,
"Could not publish data after {Timeout}s ({ExceptionMessage})",
$"{time.TotalSeconds:n1}", ex.Message);
});
var channel = _connection.CreateModel();
_logger.LogTrace("Declaring RabbitMQ exchange to publish event");
channel.ExchangeDeclare(exchange: _options.Exchange, type: "direct");
policy.Execute(() =>
{
var properties = channel.CreateBasicProperties();
properties.DeliveryMode = 2; // persistent
_logger.LogTrace("Publishing event to RabbitMQ");
channel.BasicPublish(_options.Exchange, topic, true, properties, bytes);
channel.Dispose();
});
await Task.CompletedTask;
}
public RabbitMQMessageQueue(IOptions <RabbitMQOptions> options, ILoggerFactory loggerFactory)
{
_logger = loggerFactory.CreateLogger <RabbitMQMessageQueue>();
_options = options.Value;
_connection = new PersistentConnection(CreateConnectionFactory(),
loggerFactory.CreateLogger <PersistentConnection>(), _options.RetryCount);
if (!_connection.IsConnected)
{
_connection.TryConnect();
}
_logger.LogTrace("Creating RabbitMQ publish channel");
_publishChannel = _connection.CreateModel();
_publishChannel.ExchangeDeclare(exchange: _options.Exchange, type: "direct", durable: true);
}
