NewBreaker instantiates a new circuit breaker.

ErrBreakerOpen is a reference error that matches the errors returned from Breaker.Err(), i.e.

Breaker is a circuit breaker.

EventFormatter allows direct access to the translation of EventHandler inputs to log line suitable for formatted output.

EventLogger is an implementation of EventHandler that relays to a logging function.

Options are the arguments to NewBreaker.

An EventHandler is reported to by circuit breakers.

Signal is returned from the Breaker.Signal method.