/*
* Optimize the calculation process by using multiple threads (8) for calculation
*
* We want to know the total invoice values
* This is calculated by taking all sold products and combine them
* With 21% (VAT) and 10% (Handling cost)
* Orders greater than 1,000 euro will receive a 5% deduction before calculating additional costs
*
* Use blockingcollection
*/
public async Task <IEnumerable <OrderTotalAmount> > GetTotalAmountPerInvoice(PageModel page)
{
var orders = await _context.Orders
.Skip((page.Page - 1) *page.PageSize)
.Take(page.PageSize)
.Include(o => o.OrderProducts)
.AsNoTracking()
.ToListAsync();
//List<OrderTotalAmount> result = new List<OrderTotalAmount>(orders.Count);
//foreach (var order in orders ?? Enumerable.Empty<Order>())
//{
// result.Add(_orderProcessor.CalculateInvoiceTotal(order));
//}
//return result;
var result = new BlockingCollection <OrderTotalAmount>(orders.Count);
Parallel.ForEach(
orders,
new ParallelOptions {
MaxDegreeOfParallelism = 8
}, // how many threads will be used at one moment
order =>
{
result.Add(_orderProcessor.CalculateInvoiceTotal(order));
}
);
return(result);
}
/*
* Optimize the calculation process by using multiple threads (8) for calculation
*
* We want to know the total invoice values
* This is calculated by taking all sold products and combine them
* With 21% (VAT) and 10% (Handling cost)
* Orders greater than 1,000 euro will receive a 5% deduction before calculating additional costs
*
* Use blockingcollection
*/
public async Task <IEnumerable <OrderTotalAmount> > GetTotalAmountPerInvoice(PageModel page)
{
var orders = await _context.Orders
.Skip((page.Page - 1) *page.PageSize)
.Take(page.PageSize)
.Include(o => o.OrderProducts)
.AsNoTracking()
.ToListAsync();
List <OrderTotalAmount> result = new List <OrderTotalAmount>(orders.Count);
foreach (var order in orders ?? Enumerable.Empty <Order>())
{
result.Add(_orderProcessor.CalculateInvoiceTotal(order));
}
return(result);
}