private void ProcessQueue(IModel model, CancellationToken cancellation)
{
while (!cancellation.IsCancellationRequested)
{
LinkProducerMessage message;
try
{
message = _messageQueue.Wait(cancellation);
}
catch (Exception ex)
{
if (cancellation.IsCancellationRequested)
{
continue;
}
_logger.Error($"Cannot read message from queue: {ex}");
return;
}
var seq = model.NextPublishSeqNo;
var corellationId = _ackQueue.Add(message, seq);
var properties = model.CreateBasicProperties();
properties.Extend(message.Properties);
if (_configuration.SetUserId)
{
properties.UserId = _channel.Connection.UserId;
}
if (properties.Headers == null)
{
properties.Headers = new Dictionary <string, object>();
}
properties.Headers[CorrelationHeader] = Encoding.UTF8.GetBytes(corellationId);
try
{
model.BasicPublish(
_exchange.Name,
message.PublishProperties.RoutingKey ?? "",
message.PublishProperties.Mandatory ?? false,
properties,
message.Body
);
}
catch (Exception ex)
{
_logger.Error($"Cannot publish message: {ex.Message}");
return;
}
if (!ConfirmsMode)
{
_ackQueue.Ack(seq, false);
}
}
}
private async Task <LinkTopologyState> OnConfigureAsync(IModel model, bool retry, CancellationToken cancellation)
{
if (retry)
{
try
{
_logger.Debug($"Retrying in {_configuration.RecoveryInterval.TotalSeconds:0.###}s");
await Task.Delay(_configuration.RecoveryInterval, cancellation)
.ConfigureAwait(false);
}
catch
{
return(LinkTopologyState.Reconfiguring);
}
}
_logger.Debug("Configuring topology");
try
{
await _topologyRunner
.RunAsync(model, cancellation)
.ConfigureAwait(false);
}
catch (Exception ex)
{
_logger.Warning($"Exception on configuration: {ex}");
try
{
await _configuration.TopologyHandler.ConfigurationError(ex)
.ConfigureAwait(false);
}
catch (Exception handlerException)
{
_logger.Error($"Error in error handler: {handlerException}");
}
return(LinkTopologyState.Reconfiguring);
}
try
{
await _configuration.TopologyHandler.Ready()
.ConfigureAwait(false);
}
catch (Exception ex)
{
_logger.Error($"Error in ready handler: {ex}");
}
_logger.Debug("Topology configured");
return(LinkTopologyState.Ready);
}
private async Task Loop()
{
var newState = LinkConnectionState.Opening;
while (true)
{
if (_disposeCancellation.IsCancellationRequested)
{
newState = LinkConnectionState.Stopping;
}
ChangeState(newState);
try
{
switch (State)
{
case LinkConnectionState.Opening:
case LinkConnectionState.Reopening:
newState = await OpenReopenAsync(State == LinkConnectionState.Reopening)
.ConfigureAwait(false)
? LinkConnectionState.Active
: LinkConnectionState.Stopping;
break;
case LinkConnectionState.Active:
await AsyncHelper.RunAsync(Active)
.ConfigureAwait(false);
newState = LinkConnectionState.Stopping;
break;
case LinkConnectionState.Stopping:
await AsyncHelper.RunAsync(Stop)
.ConfigureAwait(false);
if (_disposeCancellation.IsCancellationRequested)
{
return;
}
newState = LinkConnectionState.Reopening;
break;
default:
throw new NotImplementedException($"Handler for state ${State} not implemeted");
}
}
catch (Exception ex)
{
_logger.Error($"Unhandled exception: {ex}");
}
}
}