private async Task ProcessFileWithTransaction(string filePath, string messageId)
{
using (var transaction = new DirectoryBasedTransaction(_messageDirectory))
{
transaction.BeginTransaction(filePath);
var messageFile = File.ReadAllLines(transaction.FileToProcess);
var bodyPath = messageFile.First();
var messageHeaderJson = string.Join("", messageFile.Skip(1));
var messageHeaders = HeaderSerializer.DeSerialize(messageHeaderJson);
if (RemoveFileIfExpired(messageHeaders, transaction))
{
return;
}
var fileContents = File.ReadAllBytes(bodyPath);
var transportTransaction = new TransportTransaction();
transportTransaction.Set(transaction);
var shouldCommit = await HandleMessageWithRetries(messageId, messageHeaders, fileContents, transportTransaction, 1);
if (shouldCommit)
{
transaction.Commit();
}
}
}
private static bool RemoveFileIfExpired(Dictionary <string, string> messageHeaders, DirectoryBasedTransaction transaction)
{
string timeToBeReturnedString;
if (messageHeaders.TryGetValue(Headers.TimeToBeReceived, out timeToBeReturnedString))
{
// This works because moving the file inside the transaction preserves create time
var sentTime = File.GetCreationTimeUtc(transaction.FileToProcess);
var timeToBeReturned = TimeSpan.Parse(timeToBeReturnedString);
if (sentTime + timeToBeReturned < DateTime.UtcNow)
{
return(true);
}
}
return(false);
}
