public double GetElevation(double lat, double lng)
{
IElevationService service = GetService();
double elevation = service.GetElevation(lat, lng);
if (elevation == 0 || elevation < -100)
{
// Error getting elevation so just return 0.
Logger.Write(
$"{service.GetServiceId()} response not reliable: {elevation.ToString()}, and will be blacklisted for one hour.",
LogLevel.Warning
);
BlacklistStrategy(service.GetType());
Logger.Write(
$"Falling back to next elevation strategy: {GetService().GetServiceId()}.",
LogLevel.Warning
);
// After blacklisting, retry.
return(GetElevation(lat, lng));
}
return(elevation);
}
public async Task <double> GetElevation(double lat, double lng)
{
IElevationService service = GetService();
if (service is RandomElevationService)
{
// Don't hit the database for random elevation service.
return(await service.GetElevation(lat, lng).ConfigureAwait(false));
}
ElevationLocation elevationLocation = await ElevationLocation.FindOrUpdateInDatabase(lat, lng, service).ConfigureAwait(false);
if (elevationLocation == null)
{
Logger.Write(
$"{service.GetServiceId()} response not reliable and will be blacklisted for one hour.",
LogLevel.Warning
);
BlacklistStrategy(service.GetType());
Logger.Write(
$"Falling back to next elevation strategy: {GetService().GetServiceId()}.",
LogLevel.Warning
);
// After blacklisting, retry.
return(await GetElevation(lat, lng).ConfigureAwait(false));
}
return(BaseElevationService.GetRandomElevation(elevationLocation.Altitude));
}
public string GetServiceId()
{
IElevationService service = GetService();
return(service.GetServiceId());
}
