public int IncrementProductStock(Product product, int count)
{
if (product == null)
throw new ArgumentNullException("product");
if (count <= 0)
throw new ArgumentException("Count must be greater than zero");
if (string.IsNullOrEmpty(product.Id))
throw new ArgumentException("Product must have an Id");
rwlProductStock.EnterWriteLock();
try
{
if (!productStock.ContainsKey(product))
{
productStock.Add(product, count);
}
else
{
productStock[product] += count;
}
return productStock[product];
}
finally
{
rwlProductStock.ExitWriteLock();
}
}
public IEnumerable<Product> Get()
{
var fruits = new Category("Fruits");
var veggies = new Category("Veggies");
var apple = new Product("apple");
apple.Categories = new List<Category>() { fruits };
var potato = new Product("Potatoes");
potato.Categories = new List<Category>() { veggies };
var banana = new Product("Banana");
banana.Categories = new List<Category>() { fruits };
List<Product> list = new List<Product>(){
apple, potato, banana
};
return list.AsQueryable<Product>();
}
public int DecrementProductStock(Product product, int count)
{
if (product == null)
throw new ArgumentNullException("product");
if (count <= 0)
throw new ArgumentException("Count must be greater than zero");
rwlProductStock.EnterWriteLock();
try
{
if (!this.productStock.ContainsKey(product))
throw new ArgumentException("Product " + product + " is not in stock");
if (count > this.productStock[product])
throw new ArgumentException("Requested count exceeds available stock; Requested: " + count + ", available: " + this.productStock[product]);
this.productStock[product] -= count;
return this.productStock[product];
}
finally
{
rwlProductStock.ExitWriteLock();
}
}
