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Resilience4J: Circuit Breaker, Retry and RateLimiter Patterns

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Pragya Keshap answered on February 10, 2023 Popularity 1/10 Helpfulness 1/10

answer Resilience4J: Circuit Breaker, Retry and RateLimiter Patterns

Resilience4J: Circuit Breaker, Retry and RateLimiter Patterns

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management.endpoints.web.exposure.include=*

management.endpoint.health.show-details=always

management.health.circuitbreakers.enabled=true

management.health.ratelimiters.enabled=true

resilience4j.circuitbreaker.instances.CircuitBreakerService.failure-rate-threshold=50

resilience4j.circuitbreaker.instances.CircuitBreakerService.minimum-number-of-calls=5

resilience4j.circuitbreaker.instances.CircuitBreakerService.automatic-transition-from-open-to-half-open-enabled=true

resilience4j.circuitbreaker.instances.CircuitBreakerService.wait-duration-in-open-state=5s

resilience4j.circuitbreaker.instances.CircuitBreakerService.permitted-number-of-calls-in-half-open-state=3

resilience4j.circuitbreaker.instances.CircuitBreakerService.sliding-window-size=10

resilience4j.circuitbreaker.instances.CircuitBreakerService.sliding-window-type=count_based

@Test
public void testCircuitBreaker() {
    EXTERNAL_SERVICE.stubFor(WireMock.get("/api/external")
      .willReturn(serverError()));

    IntStream.rangeClosed(1, 5)
      .forEach(i -> {
          ResponseEntity response = restTemplate.getForEntity("/api/circuit-breaker", String.class);
          assertThat(response.getStatusCode()).isEqualTo(HttpStatus.INTERNAL_SERVER_ERROR);
      });

    IntStream.rangeClosed(1, 5)
      .forEach(i -> {
          ResponseEntity response = restTemplate.getForEntity("/api/circuit-breaker", String.class);
          assertThat(response.getStatusCode()).isEqualTo(HttpStatus.SERVICE_UNAVAILABLE);
      });
    
    EXTERNAL_SERVICE.verify(5, getRequestedFor(urlEqualTo("/api/external")));
}

https://www.baeldung.com/spring-boot-resilience4j

Popularity 1/10 Helpfulness 1/10 Language java

Source: Grepper

Tags: java

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Contributed on Feb 10 2023

Pragya Keshap

0 Answers Avg Quality 2/10

Resilience4J: Circuit Breaker, Retry and RateLimiter Patterns

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