embedded

type Component[T IItem] struct {
	Writers       map[string][]IInstance[T]             // 写节点
	WriterBalance func(ts ...IInstance[T]) IInstance[T] // 选取算法
	Readers       map[string][]IInstance[T]             // 读节点
	ReaderBalance func(ts ...IInstance[T]) IInstance[T] //选取算法
}

type IComponent[T IItem] interface {
	NewWriter(id string, items ...T)
	GetWriter(id string) T
	NewReader(id string, items ...T)
	GetReader(id string) T
	SetWriterBalance(f func(ts ...IInstance[T]) IInstance[T])
	SetReaderBalance(f func(ts ...IInstance[T]) IInstance[T])
}

type IInstance[T IItem] interface {
	GetID() string
	GetWeight() float64
	GetValue() T
}

type IItem any // client or sdk

type Instance[T IItem] struct {
	Id     string
	Weight float64
	Value  T
}