arrow-fx-coroutines / arrow.fx.coroutines / CircuitBreaker / doOnOpen

doOnOpen

fun doOnOpen(callback: suspend () -> Unit): CircuitBreaker

Returns a new circuit breaker that wraps the state of the source and that will fire the given callback upon the circuit breaker transitioning to the CircuitBreaker.Open state.

It is useful for gathering stats.

NOTE: calling this method multiple times will create a circuit breaker that will call multiple callbacks, thus the callback given is cumulative with other specified callbacks.

Parameters

callback - will be executed when the state evolves into CircuitBreaker.Open

Return a new circuit breaker wrapping the state of the source