private async Task HandleUnexpectedShutdownAsync(ShutdownEventArgs e)
{
if (!_shutdown)
{
await Task.Yield();
bool success;
do
{
await _chanHost.MakeChannelAsync();
_logger.LogWarning(
LogMessages.Consumers.ConsumerShutdownEvent,
ConsumerOptions.ConsumerName,
e.ReplyText);
success = StartConsuming();
}while (!_shutdown && !success);
}
}
private async Task <bool> StartConsumingAsync()
{
if (_shutdown)
{
return(false);
}
_logger.LogInformation(
LogMessages.Consumers.StartingConsumer,
ConsumerOptions.ConsumerName);
if (Options.FactoryOptions.EnableDispatchConsumersAsync)
{
if (_asyncConsumer != null)
{
_asyncConsumer.Received -= ReceiveHandlerAsync;
_asyncConsumer.Shutdown -= ConsumerShutdownAsync;
}
try
{
_asyncConsumer = CreateAsyncConsumer();
if (_asyncConsumer == null)
{
return(false);
}
_chanHost
.GetChannel()
.BasicConsume(
ConsumerOptions.QueueName,
ConsumerOptions.AutoAck ?? false,
ConsumerOptions.ConsumerName,
ConsumerOptions.NoLocal ?? false,
ConsumerOptions.Exclusive ?? false,
null,
_asyncConsumer);
}
catch (Exception ex)
{
_logger.LogError(ex, "Exception creating internal RabbitMQ consumer. Retrying...");
await Task.Delay(1000).ConfigureAwait(false);
await _chanHost.MakeChannelAsync().ConfigureAwait(false);
return(false);
}
}
else
{
if (_consumer != null)
{
_consumer.Received -= ReceiveHandler;
_consumer.Shutdown -= ConsumerShutdown;
}
try
{
_consumer = CreateConsumer();
if (_consumer == null)
{
return(false);
}
_chanHost
.GetChannel()
.BasicConsume(
ConsumerOptions.QueueName,
ConsumerOptions.AutoAck ?? false,
ConsumerOptions.ConsumerName,
ConsumerOptions.NoLocal ?? false,
ConsumerOptions.Exclusive ?? false,
null,
_consumer);
}
catch (Exception ex)
{
_logger.LogError(ex, "Exception creating internal RabbitMQ consumer. Retrying...");
await Task.Delay(1000).ConfigureAwait(false);
await _chanHost.MakeChannelAsync().ConfigureAwait(false);
return(false);
}
}
_logger.LogInformation(
LogMessages.Consumers.StartedConsumer,
ConsumerOptions.ConsumerName);
return(true);
}
