public static CommunicationPackage CreateFetchRequest(int deviceId)
{
// Check there isn't one that already exists and isn't acked yet.
marcdissertation_dbEntities ctxt = new marcdissertation_dbEntities();
if (ctxt.CommunicationPackages.Where(x => x.TargetDeviceId == deviceId && x.CommunicationType == (int)UpdateType.FetchRequest && x.Status == null && x.Response == null).Count() == 0)
{
// Create new
CommunicationPackage comm = new CommunicationPackage();
comm.TargetDeviceId = deviceId;
comm.CommunicationType = (int)UpdateType.FetchRequest;
comm.SubmitDate = DateTime.Now;
comm.WorkOrderId = null;
comm.context = ctxt;
comm = comm.context.CommunicationPackages.Add(comm);
errors = comm.context.GetValidationErrors();
try {
comm.context.SaveChanges();
} catch {
throw App.ExceptionFormatter(errors);
}
return(comm);
}
else
{
CommunicationPackage comm = ctxt.CommunicationPackages.Where(x => x.TargetDeviceId == deviceId && x.CommunicationType == (int)UpdateType.FetchRequest && x.Status == null && x.Response == null).First();
comm.context = ctxt;
return(comm);
}
}
public void DeleteOutstandingSlaveCommPackages()
{
// Get packages outstanding
IEnumerable <CommunicationPackage> outstandingCPs = this.CommunicationPackages.Where(x => x.Response == null && x.Status == null && x.CommunicationType != (int)CommunicationPackage.UpdateType.Result);
foreach (CommunicationPackage cp in outstandingCPs)
{
CommunicationPackage oCp = CommunicationPackage.Populate(cp.CommunicationId);
oCp.Status = "CANCELLED";
oCp.Save();
}
}
public static CommunicationPackage Populate(int communicationId)
{
try {
marcdissertation_dbEntities ctxt = new marcdissertation_dbEntities();
// App.DbContext.Configuration.ProxyCreationEnabled = false;
CommunicationPackage comm = (from x in ctxt.CommunicationPackages
where x.CommunicationId == communicationId
select x).First();
// App.DbContext.Configuration.ProxyCreationEnabled = true;
comm.context = ctxt;
return(comm);
} catch (Exception ex) {
return(null);
}
}
public static CommunicationPackage CreateCommunication(int deviceId, UpdateType commType, int?workOrderId)
{
CommunicationPackage comm = new CommunicationPackage();
comm.TargetDeviceId = deviceId;
comm.CommunicationType = (int)commType;
comm.SubmitDate = DateTime.Now.AddSeconds(-35); // This is a hack, should be a nullable type
comm.WorkOrderId = workOrderId;
comm.context = new marcdissertation_dbEntities();
comm = comm.context.CommunicationPackages.Add(comm);
errors = comm.context.GetValidationErrors();
try {
comm.context.SaveChanges();
} catch {
throw App.ExceptionFormatter(errors);
}
return(comm);
}
private void ProcessCommunication(CommunicationPackage cp)
{
try {
// CommunicationPackage cp = Newtonsoft.Json.JsonConvert.DeserializeObject<CommunicationPackage>(cpSerialized);
UserDevice ud = UserDevice.Populate(cp.TargetDeviceId);
ActiveDevice ad;
// Have to try and catch the exception, since might not exist in the current context
try {
ad = ActiveDevice.Populate(ud.DeviceId);
} catch (Exception) {
ad = null;
}
CommunicationPackage fetchRequest = CommunicationPackage.CreateFetchRequest(cp.TargetDeviceId);
// If last fetch from device was less than 3 mins ago, don't send GCM
if (ad != null && ad.LastFetch < DateTime.Now.AddMinutes(-1)) {
// Send GCM
if (fetchRequest.SendAttempts < 3 && fetchRequest.SubmitDate < DateTime.Now.AddSeconds(-30)) {
Pusher.SendNotification(ud.GCMCode, fetchRequest.Serialize());
fetchRequest.SubmitDate = DateTime.Now;
fetchRequest.SendAttempts++;
fetchRequest.Save();
} else if (fetchRequest.SendAttempts >= 3 && fetchRequest.SubmitDate < DateTime.Now.AddSeconds(-40)) {
// Device might not be active, delete it from the active device list.
try {
ad.Delete();
} catch {
}
// If not results, re-arrange WO
List<int?> workOrdersToBeRearranged = ud.CommunicationPackages.Where(x => x.Status == null && x.Response == null && x.CommunicationType != (int)CommunicationPackage.UpdateType.Result).Select(x => x.WorkOrderId).ToList();
// Delete current Comm Packages to the device if they are requests for work.
ud.DeleteOutstandingSlaveCommPackages();
// Rearange work orders
foreach (int? woId in workOrdersToBeRearranged) {
if (woId.HasValue)
NewWorkOrders.Send(new BrokeredMessage(woId.Value));
}
}
}
// handle if less than 10 ... etc..
} catch (Exception e) {
Debug.WriteLine(e.Message);
}
}