private void SendLogToServer(object data)
{
//only accept eventlog data
if (!(data is EventLog))
{
return;
}
SendStatus.IsActive = true;
//cast generic data to what we actually need
EventLog newLog = data as EventLog;
//find all logs that haven't been handled (submitted)
List<EventLog> logsToBeSaved = null;
//request exclusive access to our cache of existing logs
lock (_cache)
{
//get pending records
logsToBeSaved = GetLogsFromCache();
//add new log to list
logsToBeSaved.Add(newLog);
//clear out cache
SaveLogsToCache(new List<EventLog>());
}
//reorder by date received (created in our case)
logsToBeSaved = logsToBeSaved.OrderBy(l => l.DateReceived).ToList();
//loop through each log to be saved, give a dummy ID number
int counter = 1;
foreach (EventLog log in logsToBeSaved)
{
log.Id = counter;
counter++;
}
//update our send status with the number of logs that we
//plan to submit
SendStatus.NumberOfTransmissions = logsToBeSaved.Count;
//will hold the list of saved logs
List<int> savedLogs = new List<int>(logsToBeSaved.Count);
//send logs to the server
foreach (EventLog log in logsToBeSaved)
{
//reset the log's sending user just to be safe
_logger.WriteToLog(string.Format("Sending log with ID {0} to the server", log.Id), LogPriority.LowPriority);
SendStatus.CurrentTransmission = log;
try
{
//the number that comes back from the web service is the log's local ID number. Save
//for later when we clean up our local db.
int result = -1;
lock (_cache)
{
string webServiceKey = _cache[StringConstants.AuthenticationCacheKey] as string;
result = _webServiceClient.SubmitLog(log, webServiceKey);
}
savedLogs.Add(result);
//update our submission status
SendStatus.LastTransmissionTime = DateTime.UtcNow;
SendStatus.LastTransmission = log;
SendStatus.CompletedTransmissions++;
}
catch (Exception ex)
{
SendError(ex);
break;
}
}
//any logs that weren't saved successfully get added back into the cache
foreach (int logId in savedLogs)
{
EventLog log = logsToBeSaved.Where(l => l.Id == logId).FirstOrDefault();
if (log != null)
{
logsToBeSaved.Remove(log);
}
}
//save the modified list back into the cache
lock (_cache)
{
SaveLogsToCache(logsToBeSaved);
}
SendStatus.IsActive = false;
}
