如何使用Go语言实现面向对象的事件驱动编程

type Event struct {
    data interface{}
}

type EventHandler func(event Event)

type EventListener struct {
    eventHandlers map[string][]EventHandler
}

func (l *EventListener) Register(eventType string, handler EventHandler) {
    l.eventHandlers[eventType] = append(l.eventHandlers[eventType], handler)
}

func (l *EventListener) Trigger(event Event) {
    eventType := reflect.TypeOf(event).String()
    handlers := l.eventHandlers[eventType]
    for _, handler := range handlers {
        handler(event)
    }
}

type EventBus struct {
    listener *EventListener
}

func NewEventBus() *EventBus {
    return &EventBus{
        listener: &EventListener{
            eventHandlers: make(map[string][]EventHandler),
        },
    }
}

func (bus *EventBus) Register(eventType string, handler EventHandler) {
    bus.listener.Register(eventType, handler)
}

func (bus *EventBus) Trigger(event Event) {
    bus.listener.Trigger(event)
}

type User struct {
    Name  string
    Email string
}

func main() {
    eventBus := NewEventBus()

    // 注册事件处理函数
    eventBus.Register(reflect.TypeOf(User{}).String(), func(event Event) {
        user := event.data.(User)
        fmt.Println("处理用户创建事件:", user)
    })

    // 触发事件
    user := User{
        Name:  "Alice",
        Email: "alice@example.com",
    }
    eventBus.Trigger(Event{data: user})
}