Examples with EventConsumer io.github.resilience4j.core.EventConsumer used on opensource projects

Example 1 with EventConsumer

use of io.github.resilience4j.core.EventConsumer in project resilience4j by resilience4j.

the class CircuitBreakerAutoTransitionStateMachineTest method setUp.

@Before
public void setUp() {
    CircuitBreakerConfig circuitBreakerConfigGroupA = CircuitBreakerConfig.custom().failureRateThreshold(50).ringBufferSizeInClosedState(5).ringBufferSizeInHalfOpenState(3).enableAutomaticTransitionFromOpenToHalfOpen().waitDurationInOpenState(Duration.ofSeconds(2)).recordFailure(error -> !(error instanceof NumberFormatException)).build();
    CircuitBreakerConfig circuitBreakerConfigGroupB = CircuitBreakerConfig.custom().failureRateThreshold(50).ringBufferSizeInClosedState(5).ringBufferSizeInHalfOpenState(3).enableAutomaticTransitionFromOpenToHalfOpen().waitDurationInOpenState(Duration.ofSeconds(1)).recordFailure(error -> !(error instanceof NumberFormatException)).build();
    // Instantiate multiple circuit breakers in two groups, A & B
    for (int i = 0; i < TOTAL_NUMBER_CIRCUIT_BREAKERS; i++) {
        stateTransitionFromOpenToHalfOpen.put(i, 0);
        // On state transition from OPEN to HALF_OPEN, increment a count
        int finalI = i;
        EventConsumer<CircuitBreakerOnStateTransitionEvent> eventConsumer = transition -> {
            if (transition.getStateTransition().getFromState().equals(CircuitBreaker.State.OPEN) && transition.getStateTransition().getToState().equals(CircuitBreaker.State.HALF_OPEN)) {
                Integer currentCount = stateTransitionFromOpenToHalfOpen.get(finalI);
                stateTransitionFromOpenToHalfOpen.put(finalI, currentCount + 1);
            }
        };
        CircuitBreaker circuitBreaker;
        if (i < TOTAL_NUMBER_CIRCUIT_BREAKERS / 2) {
            circuitBreaker = new CircuitBreakerStateMachine("testNameA" + i, circuitBreakerConfigGroupA);
            circuitBreaker.getEventPublisher().onStateTransition(eventConsumer);
            circuitBreakersGroupA.add(circuitBreaker);
        } else {
            circuitBreaker = new CircuitBreakerStateMachine("testNameB" + i, circuitBreakerConfigGroupB);
            circuitBreaker.getEventPublisher().onStateTransition(eventConsumer);
            circuitBreakersGroupB.add(circuitBreaker);
        }
    }
}