Examples with CircuitBreaker io.github.resilience4j.circuitbreaker.CircuitBreaker used on opensource projects

Example 11 with CircuitBreaker

use of io.github.resilience4j.circuitbreaker.CircuitBreaker in project resilience4j by resilience4j.

the class CircuitBreakerAutoConfiguration method circuitBreakerRegistry.

@Bean
public CircuitBreakerRegistry circuitBreakerRegistry(CircuitBreakerProperties circuitBreakerProperties, EventConsumerRegistry<CircuitBreakerEvent> eventConsumerRegistry, ConfigurableBeanFactory beanFactory) {
    CircuitBreakerRegistry circuitBreakerRegistry = new InMemoryCircuitBreakerRegistry();
    circuitBreakerProperties.getBackends().forEach((name, properties) -> {
        CircuitBreakerConfig circuitBreakerConfig = circuitBreakerProperties.createCircuitBreakerConfig(name);
        CircuitBreaker circuitBreaker = circuitBreakerRegistry.circuitBreaker(name, circuitBreakerConfig);
        circuitBreaker.getEventPublisher().onEvent(eventConsumerRegistry.createEventConsumer(name, properties.getEventConsumerBufferSize()));
        if (properties.getRegisterHealthIndicator()) {
            CircuitBreakerHealthIndicator healthIndicator = new CircuitBreakerHealthIndicator(circuitBreaker);
            beanFactory.registerSingleton(name + "CircuitBreakerHealthIndicator", healthIndicator);
        }
    });
    return circuitBreakerRegistry;
}

Example 12 with CircuitBreaker

use of io.github.resilience4j.circuitbreaker.CircuitBreaker in project resilience4j by resilience4j.

the class CircuitBreakerHealthIndicatorTest method health.

@Test
public void health() throws Exception {
    // given
    CircuitBreakerConfig config = mock(CircuitBreakerConfig.class);
    CircuitBreaker.Metrics metrics = mock(CircuitBreaker.Metrics.class);
    CircuitBreaker circuitBreaker = mock(CircuitBreaker.class);
    CircuitBreakerHealthIndicator healthIndicator = new CircuitBreakerHealthIndicator(circuitBreaker);
    // when
    when(config.getFailureRateThreshold()).thenReturn(0.3f);
    when(metrics.getFailureRate()).thenReturn(0.2f);
    when(metrics.getMaxNumberOfBufferedCalls()).thenReturn(100);
    when(metrics.getNumberOfBufferedCalls()).thenReturn(100);
    when(metrics.getNumberOfFailedCalls()).thenReturn(20);
    when(metrics.getNumberOfNotPermittedCalls()).thenReturn(0L);
    when(circuitBreaker.getCircuitBreakerConfig()).thenReturn(config);
    when(circuitBreaker.getMetrics()).thenReturn(metrics);
    when(circuitBreaker.getState()).thenReturn(CLOSED, OPEN, HALF_OPEN, CLOSED);
    // then
    Health health = healthIndicator.health();
    then(health.getStatus()).isEqualTo(Status.UP);
    health = healthIndicator.health();
    then(health.getStatus()).isEqualTo(Status.DOWN);
    health = healthIndicator.health();
    then(health.getStatus()).isEqualTo(Status.UNKNOWN);
    health = healthIndicator.health();
    then(health.getStatus()).isEqualTo(Status.UP);
    then(health.getDetails()).contains(entry("failureRate", "0.2%"), entry("failureRateThreshold", "0.3%"), entry("bufferedCalls", 100), entry("failedCalls", 20), entry("notPermittedCalls", 0L), entry("maxBufferedCalls", 100));
}

Example 13 with CircuitBreaker

use of io.github.resilience4j.circuitbreaker.CircuitBreaker in project resilience4j by resilience4j.

the class CircuitBreakerMetricsTest method shouldUseCustomPrefix.

@Test
public void shouldUseCustomPrefix() throws Throwable {
    // Given
    CircuitBreakerRegistry circuitBreakerRegistry = CircuitBreakerRegistry.ofDefaults();
    CircuitBreaker circuitBreaker = circuitBreakerRegistry.circuitBreaker("testName");
    metricRegistry.registerAll(CircuitBreakerMetrics.ofCircuitBreakerRegistry("testPrefix", circuitBreakerRegistry));
    // Given the HelloWorldService returns Hello world
    BDDMockito.given(helloWorldService.returnHelloWorld()).willReturn("Hello world");
    // When
    String value = circuitBreaker.executeSupplier(helloWorldService::returnHelloWorld);
    // Then
    assertThat(value).isEqualTo("Hello world");
    // Then the helloWorldService should be invoked 1 time
    BDDMockito.then(helloWorldService).should(times(1)).returnHelloWorld();
    assertThat(metricRegistry.getMetrics()).hasSize(6);
    assertThat(metricRegistry.getGauges().get("testPrefix.testName.state").getValue()).isEqualTo(0);
    assertThat(metricRegistry.getGauges().get("testPrefix.testName.buffered").getValue()).isEqualTo(1);
    assertThat(metricRegistry.getGauges().get("testPrefix.testName.successful").getValue()).isEqualTo(1);
    assertThat(metricRegistry.getGauges().get("testPrefix.testName.failed").getValue()).isEqualTo(0);
    assertThat(metricRegistry.getGauges().get("testPrefix.testName.not_permitted").getValue()).isEqualTo(0L);
    assertThat(metricRegistry.getGauges().get("testPrefix.testName.buffered_max").getValue()).isEqualTo(100);
}

Example 14 with CircuitBreaker

use of io.github.resilience4j.circuitbreaker.CircuitBreaker in project resilience4j by resilience4j.

the class CircuitBreakerMetricsTest method shouldRegisterMetrics.

@Test
public void shouldRegisterMetrics() throws Throwable {
    // Given
    CircuitBreakerRegistry circuitBreakerRegistry = CircuitBreakerRegistry.ofDefaults();
    CircuitBreaker circuitBreaker = circuitBreakerRegistry.circuitBreaker("testName");
    metricRegistry.registerAll(CircuitBreakerMetrics.ofCircuitBreakerRegistry(circuitBreakerRegistry));
    // Given the HelloWorldService returns Hello world
    BDDMockito.given(helloWorldService.returnHelloWorld()).willReturn("Hello world");
    // When
    String value = circuitBreaker.executeSupplier(helloWorldService::returnHelloWorld);
    // Then
    assertThat(value).isEqualTo("Hello world");
    // Then the helloWorldService should be invoked 1 time
    BDDMockito.then(helloWorldService).should(times(1)).returnHelloWorld();
    assertThat(metricRegistry.getMetrics()).hasSize(6);
    assertThat(metricRegistry.getGauges().get("resilience4j.circuitbreaker.testName.state").getValue()).isEqualTo(0);
    assertThat(metricRegistry.getGauges().get("resilience4j.circuitbreaker.testName.buffered").getValue()).isEqualTo(1);
    assertThat(metricRegistry.getGauges().get("resilience4j.circuitbreaker.testName.successful").getValue()).isEqualTo(1);
    assertThat(metricRegistry.getGauges().get("resilience4j.circuitbreaker.testName.failed").getValue()).isEqualTo(0);
    assertThat(metricRegistry.getGauges().get("resilience4j.circuitbreaker.testName.not_permitted").getValue()).isEqualTo(0L);
    assertThat(metricRegistry.getGauges().get("resilience4j.circuitbreaker.testName.buffered_max").getValue()).isEqualTo(100);
}

Example 15 with CircuitBreaker

use of io.github.resilience4j.circuitbreaker.CircuitBreaker in project resilience4j by resilience4j.

the class DecoratorsTest method testDecoratorBuilderWithRetry.

@Test
public void testDecoratorBuilderWithRetry() {
    // Given the HelloWorldService returns Hello world
    given(helloWorldService.returnHelloWorld()).willThrow(new RuntimeException("BAM!"));
    ;
    CircuitBreaker circuitBreaker = CircuitBreaker.ofDefaults("helloBackend");
    Supplier<String> decoratedSupplier = Decorators.ofSupplier(() -> helloWorldService.returnHelloWorld()).withCircuitBreaker(circuitBreaker).withRetry(Retry.ofDefaults("id")).withBulkhead(Bulkhead.ofDefaults("testName")).decorate();
    Try.of(decoratedSupplier::get);
    CircuitBreaker.Metrics metrics = circuitBreaker.getMetrics();
    assertThat(metrics.getNumberOfBufferedCalls()).isEqualTo(3);
    assertThat(metrics.getNumberOfFailedCalls()).isEqualTo(3);
    // Then the helloWorldService should be invoked 1 time
    BDDMockito.then(helloWorldService).should(times(3)).returnHelloWorld();
}