Struct orcab

interop/orcalb.go:69–80

orcab is the balancer for the test_backend_metrics_load_balancer policy. It delegates SubConn management to endpointsharding + pick_first and intercepts NewSubConn calls to register OOB listeners on READY SubConns.

// It delegates SubConn management to endpointsharding + pick_first and
// intercepts NewSubConn calls to register OOB listeners on READY SubConns.
type orcab struct {
	// The following fields are initialized at build time and read-only after
	// that and therefore do not need to be guarded by a mutex.
	balancer.ClientConn // Embeds to intercept NewSubConn and UpdateState calls
	child               balancer.Balancer
	oobState            *oobState
	logger              *internalgrpclog.PrefixLogger

	// mu guards the fields below.
	mu               sync.Mutex
	stopOOBListeners map[balancer.SubConn]func()
}

func (b *orcab) UpdateClientConnState(s balancer.ClientConnState) error {
	// Delegate to the child endpoint sharding balancer, which distributes