balancer

type Balancer interface {
	// Balancer takes input from gRPC, manages SubConns, and collects and aggregates
	// the connectivity states.
	//
	// It also generates and updates the Picker used by gRPC to pick SubConns for RPCs.
	//
	// UpdateClientConnState, ResolverError, UpdateSubConnState, and Close are
	// guaranteed to be called synchronously from the same goroutine.  There's no
	// guarantee on picker.Pick, it may be called anytime.
	balancer.Balancer

	// Picker calls "Pick" for every client request.
	picker.Picker
}

type Config struct {
	// Policy configures balancer policy.
	Policy picker.Policy

	// Name defines an additional name for balancer.
	// Useful for balancer testing to avoid register conflicts.
	// If empty, defaults to policy name.
	Name string

	// Logger configures balancer logging.
	// If nil, logs are discarded.
	Logger *zap.Logger

	// HealthCheck indicates whether health checking should be enabled for this specific balancer.
	HealthCheck bool
}