Method Pick

balancer/balancer.go:333–333

Pick returns the connection to use for this RPC and related information. Pick should not block. If the balancer needs to do I/O or any blocking or time-consuming work to service this call, it should return ErrNoSubConnAvailable, and the Pick call will be repeated by gRPC when the Picker is updated

(info PickInfo)

	//   ready RPCs will be terminated with this error's Error() string and
	//   status code Unavailable.
	Pick(info PickInfo) (PickResult, error)
}

// Balancer takes input from gRPC, manages SubConns, and collects and aggregates