NewRandom returns a load balancer that selects services randomly.

NewRoundRobin returns a load balancer that returns services in sequence.

Retry wraps a service load balancer and returns an endpoint oriented load balancer for the specified service method.

RetryWithCallback wraps a service load balancer and returns an endpoint oriented load balancer for the specified service method.

ErrNoEndpoints is returned when no qualifying endpoints are available.

RetryError is an error wrapper that is used by the retry mechanism.

Balancer yields endpoints according to some heuristic.

Callback is a function that is given the current attempt count and the error received from the underlying endpoint.