private PriceCalculatorResult GetPriceFromErp(Guid variantSystemId)
{
var cacheKey = $"{nameof(ERPPriceCalculatorImpl)}:{variantSystemId}";
if (_distributedMemoryCacheService.TryGet <PriceCalculatorResult>(cacheKey, out var price))
{
return(price);
}
using (_distributedLockService.AcquireLock(cacheKey, TimeSpan.FromSeconds(10)))
{
// Try getting value from cache again since it was likely added while we were waiting for the lock
if (_distributedMemoryCacheService.TryGet <PriceCalculatorResult>(cacheKey, out price))
{
return(price);
}
// Test the effect of the cache by faking a slow ERP API taking one second to get a variants price:
Thread.Sleep(800);
price = new PriceCalculatorResult
{
ListPrice = 100,
VatPercentage = (decimal)0.25
};
_distributedMemoryCacheService.Set(cacheKey, price);
}
return(price);
}
private PriceCalculatorResult GetPriceFromErp(Guid variantSystemId)
{
var cacheKey = $"{nameof(ERPPriceCalculatorImpl)}:{variantSystemId}";
if (_distributedMemoryCacheService.TryGet <PriceCalculatorResult>(cacheKey, out var price))
{
return(price);
}
// Test the effect of the cache by faking a slow ERP API taking one second to get a variants price:
Thread.Sleep(800);
price = new PriceCalculatorResult
{
ListPrice = 100,
VatPercentage = (decimal)0.25
};
_distributedMemoryCacheService.Set(cacheKey, price);
return(price);
}
private PriceCalculatorResult GetPriceFromErp(Guid variantSystemId)
{
var cacheKey = $"{nameof(ErpPriceCalculatorDecorator)}:{variantSystemId}";
if (_distributedMemoryCacheService.TryGet <PriceCalculatorResult>(cacheKey, out var price))
{
_logger.LogDebug("Getting price from CACHE for variant {VariantSystemId}", variantSystemId);
return(price);
}
using (_distributedLockService.AcquireLock(cacheKey, TimeSpan.FromSeconds(10)))
{
// Try getting value from cache again since it may have been added
// from another thread/app while we were waiting for the lock
if (_distributedMemoryCacheService.TryGet(cacheKey, out price))
{
_logger.LogDebug("Getting price from CACHE for variant {VariantSystemId}", variantSystemId);
return(price);
}
_logger.LogDebug("Getting price from ERP for variant {VariantSystemId}", variantSystemId);
// Test the effect of the cache by faking a slow API:
Thread.Sleep(500);
price = new PriceCalculatorResult
{
PriceExcludingVat = 100,
PriceIncludesVat = false,
VatRate = (decimal)0.25
};
_distributedMemoryCacheService.Set(cacheKey, price);
}
return(price);
}
