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/*
* ============LICENSE_START====================================
* DCAEGEN2-SERVICES-SDK
* =========================================================
* Copyright (C) 2021 Nokia. All rights reserved.
* =========================================================
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
* ============LICENSE_END=====================================
*/
package org.onap.dcaegen2.services.sdk.rest.services.adapters.http.retry;
import io.netty.handler.timeout.ReadTimeoutException;
import io.vavr.collection.HashMultimap;
import io.vavr.collection.HashSet;
import io.vavr.control.Option;
import org.junit.jupiter.api.BeforeEach;
import org.junit.jupiter.api.Test;
import org.onap.dcaegen2.services.sdk.rest.services.adapters.http.HttpResponse;
import org.onap.dcaegen2.services.sdk.rest.services.adapters.http.ImmutableHttpResponse;
import org.onap.dcaegen2.services.sdk.rest.services.adapters.http.config.ImmutableRetryConfig;
import org.onap.dcaegen2.services.sdk.rest.services.adapters.http.config.RetryConfig;
import org.onap.dcaegen2.services.sdk.rest.services.adapters.http.exceptions.RetryableException;
import org.onap.dcaegen2.services.sdk.rest.services.model.logging.RequestDiagnosticContext;
import reactor.core.publisher.Mono;
import reactor.test.StepVerifier;
import java.net.ConnectException;
import java.time.Duration;
import static org.mockito.Mockito.mock;
import static org.mockito.Mockito.times;
import static org.mockito.Mockito.verify;
import static org.mockito.Mockito.when;
class RetryLogicTest {
private static final HashSet<Integer> RETRYABLE_HTTP_RESPONSE_CODES =
HashSet.of(404, 408, 413, 429, 500, 502, 503, 504);
private static final HashSet<Class<? extends Throwable>> RETRYABLE_EXCEPTIONS =
HashSet.of(ReadTimeoutException.class, ConnectException.class);
private static final Duration RETRY_INTERVAL = Duration.ofSeconds(5);
private static final int RETRY_COUNT = 3;
private static final Duration RETRY_EXHAUSTED = Duration.ofSeconds(RETRY_COUNT * RETRY_INTERVAL.getSeconds());
private static final RetryConfig RETRY_CONFIG = ImmutableRetryConfig.builder()
.retryCount(RETRY_COUNT)
.retryInterval(RETRY_INTERVAL)
.retryableHttpResponseCodes(RETRYABLE_HTTP_RESPONSE_CODES)
.customRetryableExceptions(RETRYABLE_EXCEPTIONS)
.build();
private final RequestDiagnosticContext dummyContext = mock(RequestDiagnosticContext.class);
private final RetryIntervalExtractor retryIntervalExtractor = mock(RetryIntervalExtractor.class);
private RetryLogic retryLogic;
@BeforeEach
void setUp() {
retryLogic = new RetryLogic(RETRY_CONFIG, retryIntervalExtractor);
}
@Test
void shouldRetryWhenRetryableException() {
// when
Mono<?> mono = Mono
.error(ReadTimeoutException.INSTANCE)
.retryWhen(retryLogic.retry(dummyContext));
// then
StepVerifier.withVirtualTime(() -> mono)
.expectSubscription()
.expectNoEvent(RETRY_EXHAUSTED)
.expectError(ReadTimeoutException.class)
.verify();
}
@Test
void shouldNotRetryWhenUnretryableException() {
// when
Mono<?> mono = Mono
.error(RuntimeException::new)
.retryWhen(retryLogic.retry(dummyContext));
// then
StepVerifier.withVirtualTime(() -> mono)
.expectSubscription()
.expectError(RuntimeException.class)
.verify();
}
@Test
void shouldUseRetryIntervalFromExtractorWhenRetryableStatusCode() {
// given
HttpResponse httpResponse = httpResponse413();
Duration retryInterval = Duration.ofSeconds(10);
when(retryIntervalExtractor.extractDelay(httpResponse))
.thenReturn(Option.of(retryInterval));
// when
Mono<?> mono = Mono
.error(() -> new RetryableException(httpResponse))
.retryWhen(retryLogic.retry(dummyContext));
// then
long noEvents = RETRY_COUNT * retryInterval.getSeconds();
StepVerifier.withVirtualTime(() -> mono)
.expectSubscription()
.expectNoEvent(Duration.ofSeconds(noEvents))
.expectError(RetryableException.class)
.verify();
verify(retryIntervalExtractor, times(RETRY_COUNT)).extractDelay(httpResponse);
}
private ImmutableHttpResponse httpResponse413() {
return ImmutableHttpResponse.builder()
.url("")
.statusCode(413)
.rawBody("".getBytes())
.headers(HashMultimap.withSeq().empty())
.build();
}
}
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