Check if a Polly circuit breaker in a wrap is closed?

Question

I need to see is a circuit break is closed but my polices are in a policy wrap. How can find the CircuitBreakerPolicy (one or more) in the wrap? Is there a better way to know is any breaker is open for a given policy?

Answer 1

As per the Polly documentation:

• The circuit-breaker exposes its state as breaker.CircuitState.

• PolicyWrap provides a variety of methods allowing you to obtain the policies in a wrap.

For example:

var breaker = wrap.GetPolicy<CircuitBreakerPolicy>();
var state = breaker.CircuitState;

or:

var breaker = wrap.GetPolicy<CircuitBreakerPolicy>(p => p.PolicyKey == "SomeKey");

or:

IEnumerable<CircuitBreakerPolicy> breakers = wrap.GetPolicies<CircuitBreakerPolicy>();

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CircuitBreakerPolicy (as the type to obtain) is only an example in the above. Substitute with the specific type you need:

• CircuitBreakerPolicy
• AsyncCircuitBreakerPolicy
• AsyncCircuitBreakerPolicy<HttpResponseMessage>

(or whatever)