public PropertyListingBusiness(ILogger <PropertyListingBusiness> logger, IMapper mapper,
IPropertyListingRepository listingRepository,
PropertyListingResponse listingResponse,
ICacheManager cache)
{
if (logger == null || mapper == null || listingRepository == null || listingResponse == null || cache == null)
{
throw new ArgumentNullException("Please check the values being passed");
}
_logger = logger;
_mapper = mapper;
_listingRepository = listingRepository;
_listingResponse = listingResponse;
_cache = cache;
}
public async Task <PropertyListingResponse> GetListing(PropertyListingRequest request)
{
//Validate Request Parameters first
if (request == null || ValidateRequestParameters(request) != "")
{
throw new ArgumentNullException(nameof(request));
}
try
{
//Generate a key from the request parameters
var cacheKey = new StringBuilder().GenerateKey(request).ToString();
//Get Listing from cache
var cacheResponse = GetListingFromCache(cacheKey);
//If listing is found in the cache, return the listing. No need to get from db
if (cacheResponse != null && cacheResponse.Items != null)
{
cacheResponse.Message = $"Cache HIT -- Found Data in Cache";
return(cacheResponse);
}
//Get Listing from DB
_logger.LogInformation($"Cache Miss -- Getting data from DB");
_listingResponse = await GetListingFromDB(request);
//Set Listing in the cache only if there is some result in the DB, otherwise there is no use
if (_listingResponse != null && _listingResponse.Items != null && _listingResponse.Items.Count() > 0)
{
SetListingCache(_listingResponse, cacheKey);
}
}
catch (Exception ex)
{
_logger.LogError($"Error in [GetListing] -> {ex.StackTrace}");
}
return(_listingResponse);
}
private void SetListingCache(PropertyListingResponse listingResponse, string cacheKey)
{
_cache.SetCache(cacheKey, _listingResponse);
}
