selector

type BalancerType interface {
	// Pick 从节点列表中选择一个节点
	Pick(ctx context.Context, nodes []Node) (Node, error)
}

type FilterFunc func(nodes []Node) []Node

type HealthCheckParams struct {
	Interval      time.Duration
	Timeout       time.Duration
	MaxContinuous int
}

type Node struct {
	// ID 是节点的唯一标识符
	ID string
	// Address 是节点的地址
	Address string
	// Metadata 是节点的元数据
	Metadata map[string]string
	// Weight 是节点的权重
	Weight int64
}

type NodeBuilderFunc func(id string, address string, metadata map[string]string) (Node, error)

type Option func(o *options)

type Random struct{}

type RoundRobin struct {
	// contains filtered or unexported fields
}

type Selector interface {
	// Select 选择一个节点
	Select(ctx context.Context) (Node, error)
	// Update 更新节点列表
	Update(nodes []Node) error
	// Apply 应用过滤器
	Apply(filters ...FilterFunc)
}

type WeightedRandom struct{}