private void ProcessFlowFile(FileInfo flowFile)
{
if (FlowFileController == null)
{
throw new InvalidOperationException("Flow file controller not been configured or assigned.");
}
try
{
// create a new flow batch - will create the flow entry if it does not exit
var flowBatch = _flowService.GetNewFlowBatch(FlowFileController.Flow.Code);
if (_logger.IsInfoEnabled)
{
_logger.Info(
$"New flow file {flowFile.Name} detected. Processing batch {flowBatch.BatchId} in flow {FlowFileController.Flow} by batch controller {FlowFileController.ControllerName}.");
}
// run processor
FlowSnapshot result = null;
try
{
result = FlowFileController.Process(flowFile, flowBatch);
if (result == null)
{
return; // no work to do
}
}
finally
{
// update transaction log - always to ensure we are not re-processing the data
UpdateTransactionLog(flowFile.FullName, result);
}
if (_logger.IsInfoEnabled)
{
_logger.Info(
$"Flow file {flowFile.Name} processed in batch {flowBatch.BatchId} in flow {FlowFileController.Flow}.");
}
if (_logger.IsInfoEnabled)
{
_logger.Info($"Flow {FlowFileController.Flow} transaction log updated.");
}
}
catch (Exception ex)
{
var msg =
$"Failed to process flow file {flowFile.Name}. Flow file controller is {FlowFileController.GetType().Name}. Error: is {ex.Message}";
throw new Exception(msg, ex);
}
finally
{
FlowFileProcessed?.Invoke(this, EventArgs.Empty);
}
}
void UpdateTransactionLog(string sourceFilePath, FlowSnapshot result)
{
// update flow transaction log
var flowFileLogEntry = new FlowFileLogEntry
{
AddressId = sourceFilePath,
TargetAddressId = result.TargetAddressId, // the output file path
BatchId = result.Batch.BatchId,
DateLastUpdated = DateTime.UtcNow
};
_dataFileTranRepo.Add(result.SourceType, result.Batch.Flow, flowFileLogEntry);
}