/// <summary>
///
/// </summary>
/// <returns>Null.</returns>
public DockingStationEvent Execute()
{
Log.Info("PopQueueOperation: Deleting oldest message from iNet upload queue.");
bool deleted = PersistedQueue.CreateInetInstance().Delete();
Log.Info("PopQueueOperation:" + (deleted ? "Message deleted." : "No messages to delete."));
return(null);
}
/// <summary>
/// This method implements the thread start for this service.
/// </summary>
protected override void Run()
{
// For logging, keep track of number of items found on queue, which of
// those successfully uploaded, and which that were ignored/skipped.
int queuedCount = 0, uploadedCount = 0, ignoredCount = 0;
InetUploader inetUploader = null;
try
{
PersistedQueue inetQueue = PersistedQueue.CreateInetInstance();
while (true)
{
if (!Runnable()) // Keep sending until the message queue is empty or we're stopped/paused.
{
break;
}
try
{
Log.Trace(">INET: Checking for non-empty queue.");
bool isEmpty = inetQueue.IsEmpty();
if (isEmpty)
{
Log.Trace(">INET: No data in upload queue.");
PendingUploads = false;
break;
}
Log.Debug(">INET: Retrieving queued item....");
// Get the oldest object on the queue (the object is not removed).
object queObject = inetQueue.Peek();
if (queObject == null)
{
Log.Debug(">INET: No data in upload queue.");
PendingUploads = false;
break;
}
PendingUploads = true;
string deviceLocation = string.Empty;
object wsParmObject = null;
queuedCount++;
QueueData queueData = null;
try
{
queueData = (QueueData)queObject;
double kB = (double)queueData.WebServiceParameterSize / 1024.0d; // convert bytes to kilobytes
Log.Debug(string.Format(">INET: {0} ({1},\"{2}\",{3}), {4} KB)...",
queueData, queueData.Id, Log.DateTimeToString(queueData.Timestamp), queueData.InetAccountNum, kB.ToString("f1")));
wsParmObject = queueData.WebServiceParameter;
}
catch (Exception e)
{
// If this failed, then something was on the queue which
// was not the right type. Could have been old data.
// Just ignore it.
ignoredCount++;
Log.Debug(">INET: " + e.ToString());
// If debug build, DO NOT delete poison data. We need to keep
// it so that we can investigate what's wrong with it.
#if DEBUG
Log.Debug(">INET: Found non-conforming data on queue: ");
Log.Debug(">INET: " + queObject.ToString());
break;
#else
Log.Debug(">INET: Found non-conforming data on queue. Purging it:");
Log.Debug(">INET: " + queObject.ToString());
//_msmqTransaction.Commit();
inetQueue.Delete(queueData.Id);
continue;
#endif
}
// We don't instantiate iNet until we know we need it And, if we make it
// to here, then that's now. We then will continue to re-use it for the duration
// that we remain in the loop.
if (inetUploader == null)
{
inetUploader = new InetUploader();
}
string errorCode = inetUploader.Upload(wsParmObject, queueData.Label, queueData.InetAccountNum);
// On any error, just break out and we'll retry on next iteration of Run().
// The intent is that if there's some network issue, or we're just offline,
// then we watn to let some time pass for the issue to clear up or to go back online.
if (errorCode != string.Empty)
{
break;
}
// Now that we've successfully uploaded it to iNet, we can remove it from the queue
Log.Debug(string.Format(">INET: Deleting uploaded {0} from queue.", queueData));
inetQueue.Delete(queueData.Id);
uploadedCount++;
}
// catch
catch (Exception ex1)
{
Log.Debug(">INET: Exception caught, - " + ex1.ToString());
}
} // end-while !empty queue
}
finally
{
if (inetUploader != null)
{
inetUploader.Dispose();
}
}
if (queuedCount > 0)
{
Log.Debug(">INET: Finished. " + queuedCount + " found in queue, " + uploadedCount + " uploaded, " + ignoredCount + " ignored");
}
}