cluster

type Cluster interface {
	Join(Directory) protocol.Invoker
}

type Directory interface {
	common.Node
	List(invocation protocol.Invocation) []protocol.Invoker
	ServiceHealthState() *protocol.ServiceHealthState
}

type Interceptor interface {
	// Invoke is the core function of a cluster interceptor, it determines the process of the interceptor
	Invoke(context.Context, protocol.Invoker, protocol.Invocation) protocol.Result
}

type LoadBalance interface {
	Select([]protocol.Invoker, protocol.Invocation) protocol.Invoker
}