/// <summary>
/// Attempts the next transaction.
/// </summary>
public void AttemptNextTransaction()
{
HttpStatusCode statusCode;
bool exitLoop = false;
lock (syncLock)
{
Device.Log.Debug(string.Format("AttemptNextTransaction: count {0} exitloop: {1} ", this.Count, exitLoop));
int qCount = this.Count;
if (qCount <= 0)
{
return;
}
while (this.Count > 0 && !exitLoop)
{
RestfulObject <T> nextItem = Peek();
if (nextItem == null || nextItem.Verb == HttpVerb.None)
{
Device.Log.Debug(string.Format("AttemptNextTransaction: next item is null or Verb == None"));
Dequeue();
continue;
}
try
{
Device.Log.Debug("Make Post Request: item: " + nextItem.Object.ToString() + " type: " + typeof(T).ToString());
RestfulObject <T> responseItem;
statusCode = MakeRequest(nextItem, out responseItem);
switch (statusCode)
{
case HttpStatusCode.OK:
case HttpStatusCode.Created:
case HttpStatusCode.Accepted:
case HttpStatusCode.NoContent:
Device.Log.Debug("Queue Processing Success: result status " + statusCode.ToString() + " item: " + nextItem.ToString() + " type: " + typeof(T).ToString());
Dequeue();
SerializeQueue();
if (OnRequestComplete != null && responseItem != null)
{
OnRequestComplete(responseItem, responseItem.Verb);
}
break;
case HttpStatusCode.Unauthorized:
case HttpStatusCode.ServiceUnavailable:
case HttpStatusCode.RequestTimeout:
case HttpStatusCode.BadGateway:
case HttpStatusCode.GatewayTimeout:
case (HttpStatusCode)(-1): // application exception from post
case (HttpStatusCode)(-2): // no response object from post
Device.Log.Debug("Halt Queue Processing: item: " + nextItem.ToString() + " type: " + typeof(T).ToString());
// do not remove from queue but halt processing to prevent repeated calls to server until authorized
exitLoop = true;
if (OnRequestError != null)
{
OnRequestError(nextItem, nextItem.Verb, statusCode);
}
if (DequeueOnError)
{
Device.Log.Debug("Removing Object From Queue: item: " + nextItem.ToString() + " type: " + typeof(T).ToString());
Dequeue();
SerializeQueue();
}
continue;
//break;
default:
Device.Log.Debug(string.Format("Restful Queue<{0}>: Received Status {1} for {2} to {3}. Removing from Queue.", typeof(T).Name, statusCode, nextItem.Verb, nextItem.TransactionEndpoint));
if (OnRequestError != null)
{
OnRequestError(nextItem, nextItem.Verb, statusCode);
}
Dequeue();
SerializeQueue();
break;
}
}
catch (Exception exc)
{
if (OnRequestFailed != null)
{
OnRequestFailed(nextItem, nextItem.Verb, exc);
}
}
}
}
}
