public Task <bool> Handle(RemoveCustomerCommand message, CancellationToken cancellationToken)
{
if (!message.IsValid())
{
NotifyValidationErrors(message);
return(Task.FromResult(false));
}
Customer customer = _customerRepository.GetById(message.Id);
if (customer == null)
{
// notificar o dominio
Bus.RaiseEvent(new DomainNotification(message.MessageType, "Registro não encontrado"));
return(Task.FromResult(false));
}
_customerRepository.Remove(message.Id);
if (Commit())
{
Bus.RaiseEvent(new CustomerRemovedEvent(message.Id));
}
return(Task.FromResult(true));
}
public async Task <Unit> Handle(RemoveCustomerCommand request, CancellationToken cancellationToken)
{
if (!request.IsValid())
{
NotifyValidationErrors(request);//激活验证错误通知
return(Unit.Value);
}
try
{
_customerRepository.DeleteById(request.Id);
}
catch (Exception e)
{
Console.WriteLine(e);
//发布异常通知
await Bus.RaiseEvent(new DomainNotification(e.Source, e.Message));
}
if (Commit())
{
//提交成功，发布领域事件
await Bus.RaiseEvent(new CustomerDeletedEvent(request.Id));
}
return(Unit.Value);
}
/// <summary>
/// Handles the specified request.
/// </summary>
/// <param name="request">The request.</param>
/// <param name="cancellationToken">The cancellation token.</param>
/// <returns>Task.</returns>
public Task Handle(RemoveCustomerCommand request, CancellationToken cancellationToken)
{
if (!request.IsValid())
{
foreach (var error in request.ValidationResult.Errors)
{
_eventDispatcher.RaiseEvent(new DomainNotification(request.MessageType, error.ErrorMessage));
}
return(Task.CompletedTask);
}
var existingCustomer = _customerRepository.FindOne(request.Id);
if (existingCustomer == null)
{
_eventDispatcher.RaiseEvent(new DomainNotification(request.MessageType, @"The customer does not exit in system"));
return(Task.CompletedTask);
}
//remove customer
_customerRepository.Delete(existingCustomer);
_unitOfWork.Commit();
return(Task.CompletedTask);
}
public Task Handle(RemoveCustomerCommand message, CancellationToken cancellationToken)
{
return(Task.Run(() =>
{
Handle(message);
}, cancellationToken));
}
public void Handle(RemoveCustomerCommand cmd)
{
var customer = _db.Customers.FirstOrDefault(c => c.Id == cmd.Id);
if (customer != null)
{
_db.Customers.Remove(customer);
}
}
/// <summary>
/// 按id移除
/// </summary>
/// <param name="id"></param>
public void Remove(int id)
{
try
{
var removeCommand = new RemoveCustomerCommand(id);
Bus.SendCommand(removeCommand);
}
catch (Exception e)
{
Console.WriteLine(e);
throw;
}
}
public void Handle(RemoveCustomerCommand message)
{
if (!message.IsValid())
{
NotifyValidationErrors(message);
return;
}
_customerRepository.Remove(message.Id);
if (Commit())
{
_bus.RaiseEvent(new CustomerRemovedEvent(message.Id));
}
}
public Task <bool> Handle(RemoveCustomerCommand message, CancellationToken cancellationToken)
{
if (!message.IsValid())
{
NotifyValidationErrors(message);
return(Task.FromResult(false));
}
_customerRepository.Remove(message.Id);
if (Commit())
{
Bus.RaiseEvent(new CustomerRemovedEvent(message.Id));
}
return(Task.FromResult(true));
}
public Task Handle(RemoveCustomerCommand message, CancellationToken cancellationToken)
{
if (!message.IsValid())
{
NotifyValidationErrors(message);
return(Task.CompletedTask);
}
_customerRepository.Remove(message.Id);
if (Commit())
{
Bus.RaiseEvent(new CustomerRemovedEvent(message.Id));
}
return(Task.CompletedTask);
}
public async Task <ValidationResult> Handle(RemoveCustomerCommand message, CancellationToken cancellationToken)
{
if (!message.IsValid())
{
return(message.ValidationResult);
}
var customer = await _customerRepository.GetById(message.Id);
if (customer is null)
{
AddError("The customer doesn't exists.");
return(ValidationResult);
}
customer.AddDomainEvent(new CustomerRemovedEvent(message.Id));
_customerRepository.Remove(customer);
return(await Commit(_customerRepository.UnitOfWork));
}
/// <summary>
/// Handles the specified request.
/// </summary>
/// <param name="request">The request.</param>
/// <param name="cancellationToken">The cancellation token.</param>
/// <returns>Task.</returns>
public async Task <bool> Handle(RemoveCustomerCommand request, CancellationToken cancellationToken)
{
if (!request.IsValid())
{
foreach (var error in request.ValidationResult.Errors)
{
throw new CustomerDomainException(error.ErrorMessage);
}
return(false);
}
var existingCustomer = _customerRepository.FindOne(request.Id);
if (existingCustomer == null)
{
throw new CustomerDomainException(@"The customer does not exit in system");
}
//remove customer
_customerRepository.Delete(existingCustomer);
return(await _unitOfWork.CommitAsync(cancellationToken));
}
public async Task <ValidationResult> Remove(Guid id)
{
var removeCommand = new RemoveCustomerCommand(id);
return(await _mediator.SendCommand(removeCommand));
}
public void Remove(string id)
{
var removeCommand = new RemoveCustomerCommand(id);
Bus.SendCommand(removeCommand);
}
Task <Unit> IRequestHandler <RemoveCustomerCommand, Unit> .Handle(RemoveCustomerCommand request, CancellationToken cancellationToken)
{
throw new NotImplementedException();
}
public async Task <IActionResult> Remove([FromBody] RemoveCustomerCommand removeCustomerCommand) => base.Ok(await mediator.Send <bool>(removeCustomerCommand));
static void Main(string[] args)
{
string keypress;
do
{
// 0)
// Display welcome text
Console.Clear();
Console.WriteLine("CQRS Pattern -- Customer List Context");
Console.WriteLine();
// 1)
Console.WriteLine("Select Action:");
Console.WriteLine();
Console.WriteLine("1) Add Customer");
Console.WriteLine("2) Remove Customer");
Console.WriteLine("3) View all Customers");
Console.WriteLine("4) Find Customer");
var selection = Console.ReadKey().KeyChar.ToString();
int.TryParse(selection, out int actionSelection);
Console.Clear();
// 2)
// Should be broken into individual methods / classes,
// utilizing other patterns such as the strategy pattern
// for handling the user's selection
switch (actionSelection)
{
case 1: // Add Customer
{
Console.Write("Customer ID (number): ");
var id = Console.ReadKey().KeyChar.ToString();
int.TryParse(id, out int customerId);
Console.WriteLine();
Console.Write("Customer Name: ");
var name = Console.ReadLine();
var cmd = new AddCustomerCommand(customerId, name);
_commandHandler.Handle(cmd);
Console.WriteLine();
Console.WriteLine("Customer added");
}
break;
case 2: // Remove Customer
{
Console.Write("Customer ID (number): ");
var id = Console.ReadKey().KeyChar.ToString();
int.TryParse(id, out int customerId);
var cmd = new RemoveCustomerCommand(customerId);
_commandHandler.Handle(cmd);
Console.WriteLine();
Console.WriteLine("Customer removed");
}
break;
case 3: // View all Customers
Console.WriteLine(_queryHandler.Handle(new GetAllCustomersQuery()));
break;
case 4: // Find Customer
{
Console.Write("Customer ID (number): ");
var id = Console.ReadKey().KeyChar.ToString();
int.TryParse(id, out int customerId);
var qry = new FindCustomerQuery(customerId);
Console.WriteLine();
Console.WriteLine(_queryHandler.Handle(qry));
}
break;
default: // Invalid choice - skip and display start menu
break;
}
// 3)
Console.WriteLine();
Console.WriteLine("Menu ( M )");
Console.WriteLine("Exit ( X )");
keypress = Console.ReadKey().KeyChar.ToString();
} while (keypress.ToLower() != "x");
}
public void Handle(RemoveCustomerCommand command)
{
throw new NotImplementedException("ToDo");
}
public void Remove(Guid id)
{
var removeCommand = new RemoveCustomerCommand(id);
_bus.SendCommand(removeCommand);
}
public void Handle(RemoveCustomerCommand command)
{
customerRepository.Remove(command.Id);
}
