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/*
* Copyright © 2012 The Feign Authors (feign@commonhaus.dev)
*
* 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.
*/
package feign.vertx;
import static com.github.tomakehurst.wiremock.client.WireMock.*;
import static com.github.tomakehurst.wiremock.stubbing.Scenario.STARTED;
import static feign.vertx.TestUtils.MAPPER;
import static feign.vertx.testcase.domain.Flavor.FLAVORS_JSON;
import static java.util.concurrent.TimeUnit.SECONDS;
import static org.assertj.core.api.Assertions.assertThat;
import feign.Logger;
import feign.RetryableException;
import feign.Retryer;
import feign.VertxFeign;
import feign.jackson.JacksonDecoder;
import feign.slf4j.Slf4jLogger;
import feign.vertx.testcase.IcecreamServiceApi;
import feign.vertx.testcase.domain.Flavor;
import io.vertx.core.Future;
import io.vertx.core.Vertx;
import io.vertx.junit5.VertxTestContext;
import java.util.Arrays;
import java.util.Collection;
import org.junit.jupiter.api.BeforeAll;
import org.junit.jupiter.api.DisplayName;
import org.junit.jupiter.api.Test;
@DisplayName("When server ask client to retry")
class RetryingTest extends AbstractFeignVertxTest {
static IcecreamServiceApi client;
@BeforeAll
static void createClient(Vertx vertx) {
client =
VertxFeign.builder()
.vertx(vertx)
.decoder(new JacksonDecoder(MAPPER))
.retryer(new Retryer.Default(100, SECONDS.toMillis(1), 5))
.logger(new Slf4jLogger())
.logLevel(Logger.Level.FULL)
.target(IcecreamServiceApi.class, wireMock.baseUrl());
}
@Test
@DisplayName("should succeed when client retries less than max attempts")
void retryingSuccess(VertxTestContext testContext) {
/* Given */
String scenario = "testRetrying_success";
wireMock.stubFor(
get(urlEqualTo("/icecream/flavors"))
.withHeader("Accept", equalTo("application/json"))
.inScenario(scenario)
.whenScenarioStateIs(STARTED)
.willReturn(aResponse().withStatus(503).withHeader("Retry-After", "1"))
.willSetStateTo("attempt1"));
wireMock.stubFor(
get(urlEqualTo("/icecream/flavors"))
.withHeader("Accept", equalTo("application/json"))
.inScenario(scenario)
.whenScenarioStateIs("attempt1")
.willReturn(aResponse().withStatus(503).withHeader("Retry-After", "1"))
.willSetStateTo("attempt2"));
wireMock.stubFor(
get(urlEqualTo("/icecream/flavors"))
.withHeader("Accept", equalTo("application/json"))
.inScenario(scenario)
.whenScenarioStateIs("attempt2")
.willReturn(
aResponse()
.withStatus(200)
.withHeader("Content-Type", "application/json")
.withBody(FLAVORS_JSON)));
/* When */
Future<Collection<Flavor>> flavorsFuture = client.getAvailableFlavors();
/* Then */
flavorsFuture.onComplete(
res ->
testContext.verify(
() -> {
if (res.succeeded()) {
assertThat(res.result())
.hasSize(Flavor.values().length)
.containsAll(Arrays.asList(Flavor.values()));
testContext.completeNow();
} else {
testContext.failNow(res.cause());
}
}));
}
@Test
@DisplayName("should fail when after max number of attempts")
void retryingNoMoreAttempts(VertxTestContext testContext) {
/* Given */
wireMock.stubFor(
get(urlEqualTo("/icecream/flavors"))
.withHeader("Accept", equalTo("application/json"))
.willReturn(aResponse().withStatus(503).withHeader("Retry-After", "1")));
/* When */
Future<Collection<Flavor>> flavorsFuture = client.getAvailableFlavors();
/* Then */
flavorsFuture.onComplete(
res ->
testContext.verify(
() -> {
if (res.failed()) {
assertThat(res.cause())
.isInstanceOf(RetryableException.class)
.hasMessageContaining("503 Service Unavailable");
testContext.completeNow();
} else {
testContext.failNow(
new IllegalStateException("RetryableException excepted but not occurred"));
}
}));
}
}