@startuml
package com.iluwatar.eda.handler {
  class UserUpdatedEventHandler {
    + UserUpdatedEventHandler()
    + onEvent(event : UserUpdatedEvent)
  }
  class UserCreatedEventHandler {
    + UserCreatedEventHandler()
    + onEvent(event : UserCreatedEvent)
  }
}
package com.iluwatar.eda.event {
  abstract class AbstractEvent {
    + AbstractEvent()
    + getType() : Class<? extends Event>
  }
  class UserUpdatedEvent {
    - user : User
    + UserUpdatedEvent(user : User)
    + getUser() : User
  }
  class UserCreatedEvent {
    - user : User
    + UserCreatedEvent(user : User)
    + getUser() : User
  }
}
package com.iluwatar.eda.framework {
  class EventDispatcher {
    - handlers : Map<Class<? extends Event>, Handler<? extends Event>>
    + EventDispatcher()
    + dispatch(event : E extends Event)
    + registerHandler(eventType : Class<E extends Event>, handler : Handler<E extends Event>)
  }
  interface Event {
    + getType() : Class<? extends Event> {abstract}
  }
  interface Handler<E extends Event> {
    + onEvent(E extends Event) {abstract}
  }
}
package com.iluwatar.eda.model {
  class User {
    - username : String
    + User(username : String)
    + getUsername() : String
  }
}
package com.iluwatar.eda {
  class App {
    + App()
    + main(args : String[]) {static}
  }
}
UserCreatedEvent -->  "-user" User
UserUpdatedEvent -->  "-user" User
AbstractEvent ..|> Event 
UserUpdatedEventHandler ..|> Handler 
UserCreatedEventHandler ..|> Handler 
UserUpdatedEvent --|> AbstractEvent 
UserCreatedEvent --|> AbstractEvent 
@enduml