/// <summary>
/// This will fetch data from Rest service , then transform data into flatten list that we can use to display in UI, transform for other services....
///
/// </summary>
/// <returns>List Of flatten object </returns>
///
public List <IData> FetchData()
{
lock (threadSafeLock)
{
if (config.EnableCache)
{
// Sometime , Depend on the project , I may add the callback is the Func<T> to re-cache expired object
var cachedData = cacheService.GetServiceData();
if (cachedData != null)
{
return(cachedData);
}
}
List <IOwner> ownersList = null;
try
{
var content = this.client.GetStringAsync(GET_CARS_ENDPOINT).Result;
var response = JsonConvert.DeserializeObject <ServiceResponse>(content);
ownersList = new List <IOwner>(response);
}
catch (JsonReaderException ex)
{
// Because in real application, Each type of Exceptions will have separate logic to haldle Login so we have to catch all exception separately instead of using just Exception object
logger.LogWarning(ex, ex.Message);
}
catch (AggregateException ex)
{
logger.LogError(ex, ex.Message);
}
catch (Exception ex)
{
// If we need to handle exception/business logic, throw or re-throw Business Exception here.
//ex : throw new ServiceException(...)
logger.LogError(ex, ex.Message);
}
var flatten = ownersList.ToFlattenList();
cacheService.CacheServiceData((flatten));
return(flatten);
}
}