Closed mazzy89 closed 7 years ago
@mazzy89 Thanks for the question!
When a circuit is opened, it will stop sending requests downstream to the main function you passed in when creating a circuit breaker. The brakes instance will instantly fail and pass back a CircuitBrokenError
. Based on how you have configured the circuit, this will happen for set period of time or until a healthCheck
returns true.
In the health check example, there is a service that will fail as time goes on (unreliableServiceCall) so after a certain amount of attempts the circuit will open. The circuit in that example is configured with a healthCheck
, so the circuit won't open again until the function/promise passed in as a health check resolves true.
Probably it is my lack in understanding the circuit brake pattern, but let's take
examples/healthCheck-example.js
. What happen when the circuit is opened?