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

Example 11 with Retry

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

the class SupplierRetryTest method testExecuteSupplier.

@Test
public void testExecuteSupplier() {
    // Given the HelloWorldService throws an exception
    BDDMockito.given(helloWorldService.returnHelloWorld()).willThrow(new WebServiceException("BAM!")).willReturn("Hello world");
    // Create a Retry with default configuration
    Retry retry = Retry.ofDefaults("id");
    // Decorate the invocation of the HelloWorldService
    String result = retry.executeSupplier(helloWorldService::returnHelloWorld);
    // Then the helloWorldService should be invoked 2 times
    BDDMockito.then(helloWorldService).should(Mockito.times(2)).returnHelloWorld();
    assertThat(result).isEqualTo("Hello world");
    assertThat(sleptTime).isEqualTo(RetryConfig.DEFAULT_WAIT_DURATION);
}

Example 12 with Retry

use of io.github.resilience4j.retry.Retry 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 13 with Retry

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

the class SupplierRetryTest method testDecorateSupplier.

@Test
public void testDecorateSupplier() {
    // Given the HelloWorldService throws an exception
    BDDMockito.given(helloWorldService.returnHelloWorld()).willThrow(new WebServiceException("BAM!")).willReturn("Hello world");
    // Create a Retry with default configuration
    Retry retry = Retry.ofDefaults("id");
    // Decorate the invocation of the HelloWorldService
    Supplier<String> supplier = Retry.decorateSupplier(retry, helloWorldService::returnHelloWorld);
    // When
    String result = supplier.get();
    // Then the helloWorldService should be invoked 2 times
    BDDMockito.then(helloWorldService).should(Mockito.times(2)).returnHelloWorld();
    assertThat(result).isEqualTo("Hello world");
    assertThat(sleptTime).isEqualTo(RetryConfig.DEFAULT_WAIT_DURATION);
}

Example 14 with Retry

use of io.github.resilience4j.retry.Retry 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);
}

Example 15 with Retry

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

the class SupplierRetryTest method testExecuteCallable.

@Test
public void testExecuteCallable() throws Exception {
    // Given the HelloWorldService throws an exception
    BDDMockito.given(helloWorldService.returnHelloWorldWithException()).willThrow(new WebServiceException("BAM!")).willReturn("Hello world");
    // Create a Retry with default configuration
    Retry retry = Retry.ofDefaults("id");
    // Decorate the invocation of the HelloWorldService
    String result = retry.executeCallable(helloWorldService::returnHelloWorldWithException);
    // Then the helloWorldService should be invoked 2 times
    BDDMockito.then(helloWorldService).should(Mockito.times(2)).returnHelloWorldWithException();
    assertThat(result).isEqualTo("Hello world");
    assertThat(sleptTime).isEqualTo(RetryConfig.DEFAULT_WAIT_DURATION);
}