///<summary>Optionally set hasConnectionLost true to keep the calling thread here until a connection to the Middle Tier connection can be established
///in the event of a web connection failure. Set hasConnectionLost to false if a throw is desired when a connection cannot be made.</summary>
internal static string SendAndReceive(DataTransferObject dto, bool hasConnectionLost = true)
{
//Anyone trying to invoke a method other than CheckUserAndPassword must first check the current HasLoginFailed status as to not call the middle tier too often.
bool isCheckUserAndPassword = (dto.MethodName == nameof(OpenDentBusiness) + "." + nameof(Userods) + "." + nameof(Userods.CheckUserAndPassword));
if (!isCheckUserAndPassword && HasLoginFailed)
{
throw new ODException("Invalid username or password.", ODException.ErrorCodes.CheckUserAndPasswordFailed);
}
string dtoString = dto.Serialize();
IOpenDentalServer service = OpenDentBusiness.WebServices.OpenDentalServerProxy.GetOpenDentalServerInstance();
return(SendAndReceiveRecursive(service, dtoString, hasConnectionLost));
}
///<summary>Tries to process the dto passed in. If there was a web connection failure then this method will keep the calling thread here
///until a connection to the Middle Tier can be established. Set hasConnectionLost to false if a throw is desired when a connection cannot be made.
///E.g. Set hasConnectionLost to false when a user is trying to log in for the first time (don't want to try logging in forever).</summary>
private static string SendAndReceiveRecursive(IOpenDentalServer service, string dtoString, bool hasConnectionLost = true)
{
try {
return(service.ProcessRequest(dtoString));
}
catch (WebException wex) {
//If no connection monitoring desired or this is a WebException that we aren't explicitly looking for then bubble up the exception.
//WebException class: https://docs.microsoft.com/en-us/dotnet/api/system.net.webexception?view=netframework-4.7.2
//WebException.Status property: https://docs.microsoft.com/en-us/dotnet/api/system.net.webexception.status?view=netframework-4.7.2
//Handling WebExceptions: https://docs.microsoft.com/en-us/dotnet/framework/network-programming/handling-errors?view=netframework-4.7.2
if (!hasConnectionLost || wex.Status != WebExceptionStatus.ConnectFailure)
{
throw;
}
//The calling method wants to automatically retry connecting to the Middle Tier until it comes back.
RemoteConnectionFailed();
return(SendAndReceiveRecursive(service, dtoString));
}
}