First of all, thank you for diehard 🙏
I'm having a hard time setting up some of the circuit breaker options. In particular, the following keys are documented, but not what type the values should be. In particular, I don't know what the value should be for the following:
:delay-ms:failure-threshold:failure-threshold-ratio:success-threshold:success-threshold-ratio:on-open:on-close:on-half-open
I assume that :on-open, :on-close, :on-half-open should be functions of artity 0.
Diehard docs: https://cljdoc.org/d/diehard/diehard/0.8.5/api/diehard.core#defcircuitbreaker
Define a circuit breaker with option.
Available options
There options are available when creating circuit breaker in
defcircuitbreaker.
Failure criteria
All the three fail options share same meaning with similar option in
retry block.
:fail-if:fail-on:fail-when:timeout-ms while give all you code a timeout is best practice in
application level, circuit breaker also provides a timeout for
marking a long running block as failure
Delay and threshold
:delay-ms required. the delay for :open circuit breaker to turn
into :half-open.:failure-threshold:failure-threshold-ratio:success-threshold:success-threshold-ratio All these four option is to determine at
what condition the circuit breaker is open.
Listeners
:on-open a function to be called when state goes :open:on-close a function to be called when state goes :closed:on-half-open a function to be called when state goes :half-open
Failsafe docs: https://jodah.net/failsafe/circuit-breaker/#event-listeners
In addition to the standard policy listeners, a CircuitBreaker can notify you when the state of the breaker changes:
circuitBreaker
.onOpen(() -> log.info("The circuit breaker was opened"))
.onClose(() -> log.info("The circuit breaker was closed"))
.onHalfOpen(() -> log.info("The circuit breaker was half-opened"));
First of all, thank you for diehard 🙏
I'm having a hard time setting up some of the circuit breaker options. In particular, the following keys are documented, but not what type the values should be. In particular, I don't know what the value should be for the following:
:delay-ms:failure-threshold:failure-threshold-ratio:success-threshold:success-threshold-ratio:on-open:on-close:on-half-openI assume that
:on-open,:on-close,:on-half-openshould be functions of artity 0.Diehard docs: https://cljdoc.org/d/diehard/diehard/0.8.5/api/diehard.core#defcircuitbreaker
Failsafe docs: https://jodah.net/failsafe/circuit-breaker/#event-listeners