Struct rrPicker

balancer/grpclb/grpclb_picker.go:106–110

rrPicker does roundrobin on subConns. It's typically used when there's no response from remote balancer, and grpclb falls back to the resolved backends. It guaranteed that len(subConns) > 0.

//
// It guaranteed that len(subConns) > 0.
type rrPicker struct {
	mu           sync.Mutex
	subConns     []balancer.SubConn // The subConns that were READY when taking the snapshot.
	subConnsNext int
}

func newRRPicker(readySCs []balancer.SubConn) *rrPicker {
	return &rrPicker{