public async Task <Unit> Handle(GeoDatabaseUpdated request, CancellationToken token)
{
try
{
_eventStore.Clear();
await _geoDatabase.BeginTransaction();
if (request.UpdateMessage is RouteNodeMessage)
{
await HandleRouteNode((RouteNodeMessage)request.UpdateMessage);
}
else if (request.UpdateMessage is RouteSegmentMessage)
{
await HandleRouteSegment((RouteSegmentMessage)request.UpdateMessage);
}
else if (request.UpdateMessage is InvalidMessage)
{
var message = (InvalidMessage)request.UpdateMessage;
if (message.Delete)
{
// We only do this in very special cases where we cannot rollback
await MarkToBeDeleted((request.UpdateMessage as InvalidMessage).Message,
"Message is invalid and we cannot rollback so we mark it to be deleted.");
await _geoDatabase.Commit();
return(await Task.FromResult(new Unit()));
}
else
{
await RollbackOrDelete((request.UpdateMessage as InvalidMessage).Message, "Message is invalid so we rollback or delete");
}
}
var editOperationOccuredEvent = CreateEditOperationOccuredEvent(request.UpdateMessage);
if (IsOperationEditEventValid(editOperationOccuredEvent))
{
if (_eventStore.Get().Count() > 0)
{
await _producer.Produce(_kafkaSettings.EventRouteNetworkTopicName, editOperationOccuredEvent);
}
await _geoDatabase.Commit();
if (_eventStore.Get().Count() > 0 && _applicationSettings.SendGeographicalAreaUpdatedNotification)
{
await _mediator.Publish(new GeographicalAreaUpdated
{
RouteNodes = _modifiedGeometriesStore.GetRouteNodes(),
RouteSegment = _modifiedGeometriesStore.GetRouteSegments()
});
}
}
else
{
_logger.LogError($"{nameof(RouteNetworkEditOperationOccuredEvent)} is not valid so we rollback.");
await _geoDatabase.RollbackTransaction();
await _geoDatabase.BeginTransaction();
await RollbackOrDelete(request.UpdateMessage, $"Rollback or delete because {nameof(RouteNetworkEditOperationOccuredEvent)} is not valid.");
await _geoDatabase.Commit();
_logger.LogInformation($"{nameof(RouteNetworkEditOperationOccuredEvent)} is now rolled rollback.");
}
}
catch (Exception e)
{
_logger.LogError($"{e.ToString()}: Rolling back geodatabase transactions");
await _geoDatabase.RollbackTransaction();
await _geoDatabase.BeginTransaction();
await RollbackOrDelete(request.UpdateMessage, $"Rollback or delete because of exception: {e.Message}");
await _geoDatabase.Commit();
}
finally
{
_eventStore.Clear();
_modifiedGeometriesStore.Clear();
await _geoDatabase.DisposeTransaction();
await _geoDatabase.DisposeConnection();
}
return(await Task.FromResult(new Unit()));
}
