事件溯源聚合根用户

Question

我是事件溯源方面的新手，我开始了一个新项目来了解它，但我有几个关于架构的问题。

我的第一个问题是关于聚合根的。我有一个UserAggregateRoot。此聚合是否应包含用户实体通常可识别的属性？

我的意思是我的 Aggregate 看起来像那样

public class UserAggregateRoot : AggregateRoot
{
    public Login Login { get; private set; }
    public Password Password { get; private set; }
    public Name Name { get; private set; }
    public DateTime BirthDate { get; private set; }
    public UserId UserId { get; private set; }
    public Status Status { get; private set; }

    private void Apply(UserCreatedEvent e)
    {
        Version = e.Version;
        Login = e.Login;
        Password = e.Password;
        Name = e.Name;
        BirthDate = e.BirthDate;
        Key = e.Key;
    }

    private void Apply(UserActivatedEvent e)
    {
        Version = e.Version++;
        Status = e.Status;
        Key = e.Key;
    }

    private void Apply(UserDeletedEvent e)
    {
        Version = e.Version++;
        Key = e.Key;
    }

    private void Apply(UserLogedEvent e)
    {
        Version = e.Version++;
        Key = e.Key;
    }

    private void Apply(UserUpdatedEvent e)
    {
        Version = e.Version++;
        Login = e.Login;
        Password = e.Password;
        Name = e.Name;    
        Key = e.Key;
     }
}

或者 UserAggregateRoot 应该像这样存储用户实体

public class UserAggregateRoot : AggregateRoot
{
    public User User { get; private set; }

    private void Apply(UserCreatedEvent e)
    {
        User = e.User;
        Key = e.User.Key;
    }

    private void Apply(UserActivatedEvent e)
    {
        Version = e.Version++;
        User = e.User;
        Key = e.User.Key;
    }

    private void Apply(UserDeletedEvent e)
    {
        Version = e.Version++;
        Key = e.User.Key;
        User = e.User;
    }

    private void Apply(UserLogedEvent e)
    {
        Version = e.Version++;
        Key = e.User.Key;
    }

    private void Apply(UserUpdatedEvent e)
    {
        Version = e.Version++;
        User = e.User;
        Key = e.User.Key;
    }
}

第二个问题是如果UserAggregateRoot存储一些订单，我是否应该将订单实体列表存储在这个UserAggregateRoot中？

如果订单 AggregateRoot 类似于 OrderAggregateRoot 怎么办？我应该将 AggregateKey 存储在我的 UserAggregateRoot 中以指向此 OrderAggregateRoot 吗？

第三个问题是 Aggregate root 是否应该在内部有业务逻辑，或者业务逻辑应该在传递给此 Aggregate 的实体内部和内部值对象中？

Answer 1

我觉得哪个都好
没有更多的领域知识很难回答。最有可能的是 OrderAggregateRoot 和包含 UserAggregateRoot 的 AggregateKey 的属性。 OrderAggregateRoot 甚至可能是一个完全不同的限界上下文。如果您想了解有关定义聚合根的更多详细信息，我建议您寻找定义事务边界。
取决于您所说的业务逻辑及其特定范围的含义，但实体和值对象可以有自己的行为。

事件溯源聚合根用户

Event Sourcing Aggregate Root User

c#

architecture

events

domain-driven-design

event-sourcing