public async Task Execute(CreateUserCommand cmd, ICqrsContext ctx, CancellationToken cancellationToken = new CancellationToken())
{
await Task.Delay(10000, cancellationToken);
Console.WriteLine($"Отправили пользователю {cmd.Login} смс о регистрации");
await Task.CompletedTask;
}
public async Task Execute(CreateUserCommand cmd, ICqrsContext ctx, CancellationToken cancellationToken = new CancellationToken())
{
await Task.Delay(20000, cancellationToken);
Console.WriteLine($"Ура, у нас появился новый пользователь, вот он - {cmd.Login}");
await Task.CompletedTask;
}
/// <summary>
/// Initializes a new instance of the <see cref="CommandHandler<TCommand>"/> class.
/// </summary>
/// <param name="context">The context.</param>
public CommandHandler(ICqrsContext context)
{
if (context == null)
{
throw new ArgumentNullException("context");
}
Context = context;
}
protected virtual async Task Proceed <TCommand>(TCommand cmd, ICqrsContext ctx, CancellationToken cancellationToken) where TCommand : class, ICommand
{
var handler = GetHandler <TCommand>(cmd);
if (handler == null)
{
throw new NotImplementedException($"Не определен обработчик для команды {cmd.GetType()}");
}
await handler.Execute(cmd, ctx, cancellationToken);
}
public async Task <TResult> ExecuteQuery <TQuery, TResult>(TQuery query, ICqrsContext ctx,
CancellationToken cancellationToken = new CancellationToken()) where TQuery : class, IQuery <TResult>
{
if (query == null)
{
throw new ArgumentNullException(nameof(query), "Запрос не передан");
}
var result = await Proceed <TQuery, TResult>(query, ctx, cancellationToken);
return(result);
}
public async Task ExecuteCommand <TCommand>(TCommand cmd, ICqrsContext ctx,
CancellationToken cancellationToken = new CancellationToken()) where TCommand : class, ICommand
{
if (cmd == null)
{
throw new ArgumentNullException(nameof(cmd), "Команда не передана");
}
await Before <TCommand>(cmd, ctx, cancellationToken);
await Proceed <TCommand>(cmd, ctx, cancellationToken);
await After <TCommand>(cmd, ctx, cancellationToken);
}
protected virtual async Task Before <TCommand>(TCommand cmd, ICqrsContext ctx, CancellationToken cancellationToken) where TCommand : class, ICommand
{
var handlers = GetBeforeHandlers(cmd);
if (handlers != null)
{
foreach (var handler in handlers)
{
if (handler == null)
{
continue;
}
await handler.Execute(cmd, ctx, cancellationToken);
}
}
}
protected virtual async Task After <TCommand>(TCommand cmd, ICqrsContext ctx, CancellationToken cancellationToken) where TCommand : class, ICommand
{
var handlers = GetAfterHandlers(cmd);
if (handlers != null)
{
var tasks = new List <Task>();
foreach (var handler in handlers)
{
if (handler == null)
{
continue;
}
tasks.Add(handler.Execute(cmd, ctx, cancellationToken));
}
Task.WaitAll(tasks.ToArray());
}
await Task.CompletedTask;
}
//protected abstract IEnumerable<IAfterQueryHandler<TQuery, TResult>> GetAfterHandlers<TQuery, TResult>(TQuery query) where TQuery : class, IQuery<TResult>;
protected virtual async Task <TResult> Proceed <TQuery, TResult>(TQuery query, ICqrsContext ctx, CancellationToken cancellationToken) where TQuery : class, IQuery <TResult>
{
var handler = GetHandler <TQuery, TResult>(query);
if (handler == null)
{
throw new NotImplementedException($"Не определен обработчик для запроса {query.GetType()}");
}
return(await handler.Execute(query, ctx, cancellationToken));
}
/// <summary>
/// Initializes a new instance of the <see cref="CommandHandler<TCommand, TAggregate>"/> class.
/// </summary>
/// <param name="context">The context.</param>
public CommandHandler(ICqrsContext context)
: base(context)
{
}
public async Task <UserDto> Execute(GetUserQuery query, ICqrsContext ctx, CancellationToken cancellationToken = new CancellationToken())
{
return(await Task.FromResult(new UserDto { Id = query.Id, Login = "******", FirstName = "Иван", MiddleName = "Иванович", LastName = "Иванов" }));
}
public async Task Execute(CreateUserCommand cmd, ICqrsContext ctx, CancellationToken cancellationToken = new CancellationToken())
{
cmd.Id = 1;
Console.WriteLine($"Я создал пользователя: {cmd.Login}");
await Task.CompletedTask;
}
