public static void ConcurrencyDemo()
{
System.Console.WriteLine("------------------------------");
System.Console.WriteLine(new StackTrace().GetFrame(0).GetMethod().Name);
System.Console.WriteLine("------------------------------");
Customer customer;
// User 1 holt Customer
using (var srv = new CustomerService())
{
customer = srv.All<Customer>().FirstOrDefault();
}
// User 2 will auch etwas machen und ist schneller
var t = Task.Factory.StartNew(() =>
{
using (var srv = new CustomerService())
{
var c = srv.All<Customer>().FirstOrDefault();
if (c != null)
{
c.LastName = "XYZ4";
c.State = State.Modified;
srv.Commit(new List<Customer>{c});
}
}
});
t.Wait();
if (customer != null)
{
customer.LastName = "ABC";
customer.State = State.Modified;
System.Console.WriteLine("-Modified Customer: {0} {1}", customer.FistName, customer.LastName);
using (var srv = new CustomerService())
{
OperationResult result = srv.Commit(new List<Customer> {customer});
if (result.ResultType == OperationResultType.ConcurencyExeption)
System.Console.WriteLine(result.Message);
}
System.Console.WriteLine("-Reseted Customer: {0} {1}", customer.FistName, customer.LastName);
}
}
public static void CrudDemo()
{
System.Console.WriteLine("------------------------------");
System.Console.WriteLine(new StackTrace().GetFrame(0).GetMethod().Name);
System.Console.WriteLine("------------------------------");
List<Customer> customers;
/****************************************************************************
* Client:"Give me List<Customer>"
*****************************************************************************/
using (var customerService = new CustomerService())
{
customers = customerService.AllIncluding<Customer>("Orders.OrderDetails.Article").Take(2).ToList();
//customers = customerService.AllIncluding(c => c.Orders).Take(2).ToList();
}
/****************************************************************************
* Modifications
* No Context => Disconnected
*****************************************************************************/
//foreach (Customer c in customers)
//{
// System.Console.WriteLine("Customer: {0} {1}", c.FistName, c.LastName);
// foreach (Order o in c.Orders)
// {
// System.Console.WriteLine("\tOrder: {0} {1}", o.Id, o.OrderDate);
// }
//}
foreach (Customer c in customers)
{
System.Console.WriteLine("Customer: {0} {1}", c.FistName, c.LastName);
foreach (Order o in c.Orders)
{
System.Console.WriteLine("\tOrder: {0} {1}", o.Id, o.OrderDate);
foreach (OrderDetail d in o.OrderDetails)
{
System.Console.WriteLine("\t\tOrderDetail: {0} {1}", d.Count, d.Article.Name);
}
}
}
System.Console.Read();
// Update existing Customer
Customer customer = customers.First();
// UPDATE
customer.FistName = "MaxXXXX";
customer.State = State.Modified;
// DELETE
//customer.State = State.Deleted;
//foreach (Order o in customer.Orders)
//{
// o.State = State.Deleted;
// foreach (OrderDetail d in o.OrderDetails)
// {
// d.Article.State = State.Deleted;
// d.State = State.Deleted;
// }
//}
/****************************************************************************
* Modifications
* No Context => Disconnected
**************************************************************************/
// Persist to DB
using (var service = new CustomerService())
{
service.Commit(customers);
}
}
