Examples with RetryConfig io.github.resilience4j.retry.RetryConfig used on opensource projects

Example 1 with RetryConfig

use of io.github.resilience4j.retry.RetryConfig in project resilience4j by resilience4j.

the class EventPublisherTest method shouldIgnoreError.

@Test
public void shouldIgnoreError() {
    // Given the HelloWorldService throws an exception
    BDDMockito.willThrow(new WebServiceException("BAM!")).willNothing().given(helloWorldService).sayHelloWorld();
    // Create a Retry with default configuration
    RetryConfig config = RetryConfig.custom().retryOnException(t -> t instanceof IOException).maxAttempts(3).build();
    Retry retry = Retry.of("id", config);
    TestSubscriber<RetryEvent.Type> testSubscriber = toFlowable(retry.getEventPublisher()).map(RetryEvent::getEventType).test();
    // Decorate the invocation of the HelloWorldService
    CheckedRunnable retryableRunnable = Retry.decorateCheckedRunnable(retry, helloWorldService::sayHelloWorld);
    // When
    Try<Void> result = Try.run(retryableRunnable);
    // Then the helloWorldService should be invoked 2 times
    BDDMockito.then(helloWorldService).should(Mockito.times(1)).sayHelloWorld();
    // and the result should be a sucess
    Assertions.assertThat(result.isFailure()).isTrue();
    Assertions.assertThat(sleptTime).isEqualTo(0);
    testSubscriber.assertValueCount(1).assertValues(RetryEvent.Type.IGNORED_ERROR);
}

Example 2 with RetryConfig

use of io.github.resilience4j.retry.RetryConfig in project resilience4j by resilience4j.

the class RunnableRetryTest method shouldReturnAfterOneAttemptAndIgnoreException.

@Test
public void shouldReturnAfterOneAttemptAndIgnoreException() {
    // Given the HelloWorldService throws an exception
    BDDMockito.willThrow(new WebServiceException("BAM!")).given(helloWorldService).sayHelloWorld();
    // Create a Retry with default configuration
    RetryConfig config = RetryConfig.custom().retryOnException(throwable -> Match(throwable).of(Case($(Predicates.instanceOf(WebServiceException.class)), false), Case($(), true))).build();
    Retry retry = Retry.of("id", config);
    // Decorate the invocation of the HelloWorldService
    CheckedRunnable retryableRunnable = Retry.decorateCheckedRunnable(retry, helloWorldService::sayHelloWorld);
    // When
    Try<Void> result = Try.run(retryableRunnable);
    // Then the helloWorldService should be invoked only once, because the exception should be rethrown immediately.
    BDDMockito.then(helloWorldService).should(Mockito.times(1)).sayHelloWorld();
    // and the result should be a failure
    Assertions.assertThat(result.isFailure()).isTrue();
    // and the returned exception should be of type RuntimeException
    Assertions.assertThat(result.failed().get()).isInstanceOf(WebServiceException.class);
    Assertions.assertThat(sleptTime).isEqualTo(0);
}

Example 3 with RetryConfig

use of io.github.resilience4j.retry.RetryConfig in project resilience4j by resilience4j.

the class RunnableRetryTest method shouldTakeIntoAccountBackoffFunction.

@Test
public void shouldTakeIntoAccountBackoffFunction() {
    // Given the HelloWorldService throws an exception
    BDDMockito.willThrow(new WebServiceException("BAM!")).given(helloWorldService).sayHelloWorld();
    // Create a Retry with a backoff function squaring the interval
    RetryConfig config = RetryConfig.custom().intervalFunction(IntervalFunction.of(Duration.ofMillis(500), x -> x * x)).build();
    Retry retry = Retry.of("id", config);
    // Decorate the invocation of the HelloWorldService
    CheckedRunnable retryableRunnable = Retry.decorateCheckedRunnable(retry, helloWorldService::sayHelloWorld);
    // When
    Try<Void> result = Try.run(retryableRunnable);
    // Then the slept time should be according to the backoff function
    BDDMockito.then(helloWorldService).should(Mockito.times(3)).sayHelloWorld();
    Assertions.assertThat(sleptTime).isEqualTo(RetryConfig.DEFAULT_WAIT_DURATION + RetryConfig.DEFAULT_WAIT_DURATION * RetryConfig.DEFAULT_WAIT_DURATION);
}

Example 4 with RetryConfig

use of io.github.resilience4j.retry.RetryConfig in project resilience4j by resilience4j.

the class SupplierRetryTest method shouldTakeIntoAccountBackoffFunction.

@Test
public void shouldTakeIntoAccountBackoffFunction() {
    // Given the HelloWorldService throws an exception
    BDDMockito.given(helloWorldService.returnHelloWorld()).willThrow(new WebServiceException("BAM!"));
    // Create a Retry with a backoff function doubling the interval
    RetryConfig config = RetryConfig.custom().intervalFunction(IntervalFunction.ofExponentialBackoff(500, 2.0)).build();
    Retry retry = Retry.of("id", config);
    // Decorate the invocation of the HelloWorldService
    CheckedFunction0<String> retryableSupplier = Retry.decorateCheckedSupplier(retry, helloWorldService::returnHelloWorld);
    // When
    Try<String> result = Try.of(retryableSupplier);
    // Then the slept time should be according to the backoff function
    BDDMockito.then(helloWorldService).should(Mockito.times(3)).returnHelloWorld();
    assertThat(sleptTime).isEqualTo(RetryConfig.DEFAULT_WAIT_DURATION + RetryConfig.DEFAULT_WAIT_DURATION * 2);
}

Example 5 with RetryConfig

use of io.github.resilience4j.retry.RetryConfig in project resilience4j by resilience4j.

the class SupplierRetryTest method shouldReturnAfterOneAttemptAndIgnoreException.

@Test
public void shouldReturnAfterOneAttemptAndIgnoreException() {
    // Given the HelloWorldService throws an exception
    BDDMockito.given(helloWorldService.returnHelloWorld()).willThrow(new WebServiceException("BAM!"));
    // Create a Retry with default configuration
    RetryConfig config = RetryConfig.custom().retryOnException(throwable -> API.Match(throwable).of(API.Case($(Predicates.instanceOf(WebServiceException.class)), false), API.Case($(), true))).build();
    Retry retry = Retry.of("id", config);
    // Decorate the invocation of the HelloWorldService
    CheckedFunction0<String> retryableSupplier = Retry.decorateCheckedSupplier(retry, helloWorldService::returnHelloWorld);
    // When
    Try<String> result = Try.of(retryableSupplier);
    // Then the helloWorldService should be invoked only once, because the exception should be rethrown immediately.
    BDDMockito.then(helloWorldService).should(Mockito.times(1)).returnHelloWorld();
    // and the result should be a failure
    assertThat(result.isFailure()).isTrue();
    // and the returned exception should be of type RuntimeException
    assertThat(result.failed().get()).isInstanceOf(WebServiceException.class);
    assertThat(sleptTime).isEqualTo(0);
}