Allow disabling the under the hood use of JerseyClient with Eureka Client. Fixes gh-4185.

docs/modules/ROOT/pages/spring-cloud-netflix.adoc

@@ -294,6 +294,8 @@ The following example shows the dependencies you need to add:
 </dependencies>
 ----
 
+If you have `JerseyClient` on the classpath but do not wish to use it in your `EuerekaClient`, make sure to set `eureka.client.jersey.enabled` to `false`.
+
 === Alternatives to the Native Netflix EurekaClient
 
 You need not use the raw Netflix `EurekaClient`.

spring-cloud-netflix-eureka-client-tls-tests/src/test/java/org/springframework/cloud/netflix/eureka/BaseCertTests.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2018-2022 the original author or authors.
+ * Copyright 2018-2024 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -33,9 +33,9 @@ import org.springframework.beans.factory.BeanCreationException;
 
 import static org.assertj.core.api.Assertions.assertThat;
 
-abstract class BaseCertTest {
+abstract class BaseCertTests {
 
-	private static final Log log = LogFactory.getLog(BaseCertTest.class);
+	private static final Log log = LogFactory.getLog(BaseCertTests.class);
 
 	protected static final String KEY_STORE_PASSWORD = "test-key-store-password";
 
@@ -53,7 +53,7 @@ abstract class BaseCertTest {
 
 	protected static File wrongClientCert;
 
-	protected BaseCertTest() {
+	protected BaseCertTests() {
 	}
 
 	@SuppressWarnings("rawtypes")

spring-cloud-netflix-eureka-client-tls-tests/src/test/java/org/springframework/cloud/netflix/eureka/EurekaClientSuite.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2018-2022 the original author or authors.
+ * Copyright 2018-2024 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -27,7 +27,7 @@ import org.junit.runners.Suite;
  * already shutdown.
  */
 @RunWith(Suite.class)
-@Suite.SuiteClasses({ EurekaClientTest.class, RestTemplateEurekaClientTest.class })
+@Suite.SuiteClasses({ EurekaClientTests.class, RestTemplateEurekaClientTests.class })
 public class EurekaClientSuite {
 
 }

spring-cloud-netflix-eureka-client-tls-tests/src/test/java/org/springframework/cloud/netflix/eureka/EurekaClientTests.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2018-2022 the original author or authors.
+ * Copyright 2018-2024 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -27,9 +27,9 @@ import org.springframework.cloud.netflix.eureka.server.EnableEurekaServer;
 
 import static org.assertj.core.api.Assertions.assertThat;
 
-public class EurekaClientTest extends BaseCertTest {
+public class EurekaClientTests extends BaseCertTests {
 
-	private static final Log log = LogFactory.getLog(EurekaClientTest.class);
+	private static final Log log = LogFactory.getLog(EurekaClientTests.class);
 
 	static EurekaServerRunner server;
 
@@ -37,11 +37,11 @@ public class EurekaClientTest extends BaseCertTest {
 
 	@BeforeAll
 	public static void setupAll() {
-		server = startEurekaServer(EurekaClientTest.TestEurekaServer.class);
-		service = startService(server, EurekaClientTest.TestApp.class);
+		server = startEurekaServer(EurekaClientTests.TestEurekaServer.class);
+		service = startService(server, EurekaClientTests.TestApp.class);
 		assertThat(service.discoveryClientOptionalArgs()).isInstanceOf(RestTemplateDiscoveryClientOptionalArgs.class);
 		log.info("Successfully asserted that Jersey will be used");
-		waitForRegistration(() -> new EurekaClientTest().createEurekaClient());
+		waitForRegistration(() -> new EurekaClientTests().createEurekaClient());
 	}
 
 	@Override

spring-cloud-netflix-eureka-client-tls-tests/src/test/java/org/springframework/cloud/netflix/eureka/RestTemplateEurekaClientTests.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2018-2022 the original author or authors.
+ * Copyright 2018-2024 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -38,9 +38,9 @@ import org.springframework.context.annotation.Bean;
 
 import static org.assertj.core.api.Assertions.assertThat;
 
-public class RestTemplateEurekaClientTest extends BaseCertTest {
+public class RestTemplateEurekaClientTests extends BaseCertTests {
 
-	private static final Log log = LogFactory.getLog(RestTemplateEurekaClientTest.class);
+	private static final Log log = LogFactory.getLog(RestTemplateEurekaClientTests.class);
 
 	private static EurekaServerRunner server;
 
@@ -48,12 +48,12 @@ public class RestTemplateEurekaClientTest extends BaseCertTest {
 
 	@BeforeAll
 	public static void setupAll() {
-		server = startEurekaServer(RestTemplateEurekaClientTest.RestTemplateTestEurekaServer.class);
-		service = startService(server, RestTemplateEurekaClientTest.RestTemplateTestApp.class);
+		server = startEurekaServer(RestTemplateEurekaClientTests.RestTemplateTestEurekaServer.class);
+		service = startService(server, RestTemplateEurekaClientTests.RestTemplateTestApp.class);
 		// Will use RestTemplate
 		assertThat(service.discoveryClientOptionalArgs()).isInstanceOf(RestTemplateDiscoveryClientOptionalArgs.class);
 		log.info("Successfully asserted that RestTemplate will be used");
-		waitForRegistration(() -> new RestTemplateEurekaClientTest().createEurekaClient());
+		waitForRegistration(() -> new RestTemplateEurekaClientTests().createEurekaClient());
 	}
 
 	@AfterAll

spring-cloud-netflix-eureka-client/src/main/java/org/springframework/cloud/netflix/eureka/config/DiscoveryClientOptionalArgsConfiguration.java

@@ -26,6 +26,8 @@ import org.apache.commons.logging.LogFactory;
 
 import org.springframework.beans.factory.ObjectProvider;
 import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.boot.autoconfigure.condition.AllNestedConditions;
+import org.springframework.boot.autoconfigure.condition.AnyNestedCondition;
 import org.springframework.boot.autoconfigure.condition.ConditionalOnBean;
 import org.springframework.boot.autoconfigure.condition.ConditionalOnClass;
 import org.springframework.boot.autoconfigure.condition.ConditionalOnMissingBean;
@@ -45,12 +47,14 @@ import org.springframework.cloud.netflix.eureka.http.RestTemplateTransportClient
 import org.springframework.cloud.netflix.eureka.http.WebClientDiscoveryClientOptionalArgs;
 import org.springframework.cloud.netflix.eureka.http.WebClientTransportClientFactories;
 import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Conditional;
 import org.springframework.context.annotation.Configuration;
 import org.springframework.web.reactive.function.client.WebClient;
 
 /**
  * @author Daniel Lavoie
  * @author Armin Krezovic
+ * @author Olga Maciaszek-Sharma
  */
 @Configuration(proxyBeanMethods = false)
 @EnableConfigurationProperties(RestTemplateTimeoutProperties.class)
@@ -66,7 +70,7 @@ public class DiscoveryClientOptionalArgsConfiguration {
 
 	@Bean
 	@ConditionalOnClass(name = "org.springframework.web.client.RestTemplate")
-	@ConditionalOnMissingClass("org.glassfish.jersey.client.JerseyClient")
+	@Conditional(JerseyClientNotPresentOrNotEnabledCondition.class)
 	@ConditionalOnMissingBean(value = { AbstractDiscoveryClientOptionalArgs.class }, search = SearchStrategy.CURRENT)
 	@ConditionalOnProperty(prefix = "eureka.client", name = "webclient.enabled", matchIfMissing = true,
 			havingValue = "false")
@@ -82,7 +86,7 @@ public class DiscoveryClientOptionalArgsConfiguration {
 
 	@Bean
 	@ConditionalOnClass(name = "org.springframework.web.client.RestTemplate")
-	@ConditionalOnMissingClass("org.glassfish.jersey.client.JerseyClient")
+	@Conditional(JerseyClientNotPresentOrNotEnabledCondition.class)
 	@ConditionalOnMissingBean(value = { TransportClientFactories.class }, search = SearchStrategy.CURRENT)
 	@ConditionalOnProperty(prefix = "eureka.client", name = "webclient.enabled", matchIfMissing = true,
 			havingValue = "false")
@@ -108,7 +112,7 @@ public class DiscoveryClientOptionalArgsConfiguration {
 	}
 
 	@Configuration(proxyBeanMethods = false)
-	@ConditionalOnClass(name = "org.glassfish.jersey.client.JerseyClient")
+	@Conditional(JerseyClientPresentAndEnabledCondition.class)
 	@ConditionalOnBean(value = AbstractDiscoveryClientOptionalArgs.class, search = SearchStrategy.CURRENT)
 	static class DiscoveryClientOptionalArgsTlsConfiguration {
 
@@ -120,7 +124,7 @@ public class DiscoveryClientOptionalArgsConfiguration {
 
 	}
 
-	@ConditionalOnMissingClass("org.glassfish.jersey.client.JerseyClient")
+	@Conditional(JerseyClientNotPresentOrNotEnabledCondition.class)
 	@ConditionalOnClass(name = "org.springframework.web.reactive.function.client.WebClient")
 	@ConditionalOnProperty(prefix = "eureka.client", name = "webclient.enabled", havingValue = "true")
 	protected static class WebClientConfiguration {
@@ -151,8 +155,8 @@ public class DiscoveryClientOptionalArgsConfiguration {
 	}
 
 	@Configuration
-	@ConditionalOnMissingClass({ "org.glassfish.jersey.client.JerseyClient",
-			"org.springframework.web.reactive.function.client.WebClient" })
+	@Conditional(JerseyClientNotPresentOrNotEnabledCondition.class)
+	@ConditionalOnMissingClass("org.springframework.web.reactive.function.client.WebClient")
 	@ConditionalOnProperty(prefix = "eureka.client", name = "webclient.enabled", havingValue = "true")
 	protected static class WebClientNotFoundConfiguration {
 
@@ -164,4 +168,40 @@ public class DiscoveryClientOptionalArgsConfiguration {
 
 	}
 
+	static class JerseyClientPresentAndEnabledCondition extends AllNestedConditions {
+
+		JerseyClientPresentAndEnabledCondition() {
+			super(ConfigurationPhase.REGISTER_BEAN);
+		}
+
+		@ConditionalOnClass(name = "org.glassfish.jersey.client.JerseyClient")
+		static class OnJerseyClientPresent {
+
+		}
+
+		@ConditionalOnProperty(value = "eureka.client.jersey.enabled", matchIfMissing = true)
+		static class OnJerseyClientEnabled {
+
+		}
+
+	}
+
+	static class JerseyClientNotPresentOrNotEnabledCondition extends AnyNestedCondition {
+
+		JerseyClientNotPresentOrNotEnabledCondition() {
+			super(ConfigurationPhase.REGISTER_BEAN);
+		}
+
+		@ConditionalOnMissingClass("org.glassfish.jersey.client.JerseyClient")
+		static class OnJerseyClientMissing {
+
+		}
+
+		@ConditionalOnProperty(value = "eureka.client.jersey.enabled", havingValue = "false")
+		static class OnJerseyClientDisabled {
+
+		}
+
+	}
+
 }

spring-cloud-netflix-eureka-client/src/main/java/org/springframework/cloud/netflix/eureka/http/RestTemplateTransportClientFactory.java

@@ -264,10 +264,10 @@ public class RestTemplateTransportClientFactory implements TransportClientFactor
 		@Override
 		protected boolean hasError(HttpStatusCode statusCode) {
 			/**
-			 * When the Eureka server restarts and a client tries to sent a heartbeat the
-			 * server will respond with a 404. By default RestTemplate will throw an
+			 * When the Eureka server restarts and a client tries to send a heartbeat the
+			 * server will respond with a 404. By default, RestTemplate will throw an
 			 * exception in this case. What we want is to return the 404 to the upstream
-			 * code so it will send another registration request to the server.
+			 * code, so it will send another registration request to the server.
 			 */
 			if (statusCode.is4xxClientError()) {
 				return false;

spring-cloud-netflix-eureka-client/src/test/java/org/springframework/cloud/netflix/eureka/config/EurekaConfigServerBootstrapperIntegrationTests.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2013-2023 the original author or authors.
+ * Copyright 2013-2024 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -59,7 +59,7 @@ import static org.mockserver.model.HttpResponse.response;
  * @author Ryan Baxter
  */
 @Testcontainers
-public class EurekaConfigServerBootstrapperIT {
+public class EurekaConfigServerBootstrapperIntegrationTests {
 
 	public static final DockerImageName MOCKSERVER_IMAGE = DockerImageName.parse("mockserver/mockserver")
 			.withTag("mockserver-" + MockServerClient.class.getPackage().getImplementationVersion());

spring-cloud-netflix-eureka-client/src/test/java/org/springframework/cloud/netflix/eureka/config/EurekaHttpClientsOptionalArgsConfigurationNoWebFluxTests.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2017-2022 the original author or authors.
+ * Copyright 2017-2024 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -37,7 +37,7 @@ import static org.assertj.core.api.AssertionsForInterfaceTypes.assertThat;
 @RunWith(ModifiedClassPathRunner.class)
 @ClassPathExclusions({ "jersey-client-*", "jersey-core-*", "jersey-apache-client4-*", "spring-webflux-*" })
 @SpringBootTest(classes = EurekaSampleApplication.class, webEnvironment = WebEnvironment.RANDOM_PORT)
-public class EurekaHttpClientsOptionalArgsConfigurationNoWebfluxTest {
+public class EurekaHttpClientsOptionalArgsConfigurationNoWebFluxTests {
 
 	@Test
 	public void contextFailsWithoutWebClient() {

spring-cloud-netflix-eureka-client/src/test/java/org/springframework/cloud/netflix/eureka/config/EurekaHttpClientsOptionalArgsConfigurationTests.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2017-2022 the original author or authors.
+ * Copyright 2017-2024 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -36,7 +36,7 @@ import static org.assertj.core.api.AssertionsForInterfaceTypes.assertThat;
 @RunWith(ModifiedClassPathRunner.class)
 @ClassPathExclusions({ "jersey-client-*", "jersey-core-*", "jersey-apache-client4-*" })
 @SpringBootTest(classes = EurekaSampleApplication.class, webEnvironment = WebEnvironment.RANDOM_PORT)
-public class EurekaHttpClientsOptionalArgsConfigurationTest {
+public class EurekaHttpClientsOptionalArgsConfigurationTests {
 
 	@Test
 	public void contextLoadsWithRestTemplate() {

spring-cloud-netflix-eureka-client/src/test/java/org/springframework/cloud/netflix/eureka/config/JerseyClientOptionalArgsConfigurationTests.java

@@ -0,0 +1,48 @@
+/*
+ * Copyright 2017-2024 the original author or authors.
+ *
+ * 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
+ *
+ *      https://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 org.springframework.cloud.netflix.eureka.config;
+
+import com.netflix.discovery.AbstractDiscoveryClientOptionalArgs;
+import org.junit.jupiter.api.Test;
+
+import org.springframework.boot.autoconfigure.AutoConfigurations;
+import org.springframework.boot.test.context.runner.ApplicationContextRunner;
+import org.springframework.cloud.netflix.eureka.http.RestTemplateDiscoveryClientOptionalArgs;
+
+import static org.assertj.core.api.Assertions.assertThat;
+
+/**
+ * Tests for Jersey client setup in DiscoveryClientOptionalArgsConfiguration.
+ *
+ * @author Olga Maciaszek-Sharma
+ */
+public class JerseyClientOptionalArgsConfigurationTests {
+
+	@SuppressWarnings("OptionalGetWithoutIsPresent")
+	@Test
+	void shouldCreateRestTemplateDiscoveryClientOptionalArgsWhenJerseyClientDisabled() {
+		new ApplicationContextRunner()
+				.withConfiguration(AutoConfigurations.of(DiscoveryClientOptionalArgsConfiguration.class))
+				.withPropertyValues("eureka.client.jersey.enabled=false").run(context -> {
+					assertThat(context).hasSingleBean(AbstractDiscoveryClientOptionalArgs.class);
+					assertThat(context.getBeansOfType(AbstractDiscoveryClientOptionalArgs.class).values().stream()
+							.findFirst().get()).isInstanceOf(RestTemplateDiscoveryClientOptionalArgs.class);
+					assertThat(context).hasSingleBean(RestTemplateDiscoveryClientOptionalArgs.class);
+				});
+	}
+
+}

spring-cloud-netflix-eureka-client/src/test/java/org/springframework/cloud/netflix/eureka/config/JerseyOptionalArgsConfigurationApplicationTests.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2017-2022 the original author or authors.
+ * Copyright 2017-2024 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -32,7 +32,7 @@ import static org.assertj.core.api.Assertions.assertThat;
  */
 @DirtiesContext
 @SpringBootTest(classes = EurekaSampleApplication.class, webEnvironment = WebEnvironment.RANDOM_PORT)
-class JerseyOptionalArgsConfigurationTest {
+class JerseyOptionalArgsConfigurationApplicationTests {
 
 	@Autowired
 	private AbstractDiscoveryClientOptionalArgs optionalArgs;

spring-cloud-netflix-eureka-client/src/test/java/org/springframework/cloud/netflix/eureka/http/RestTemplateTransportClientFactoryTests.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2017-2022 the original author or authors.
+ * Copyright 2017-2024 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -24,7 +24,7 @@ import org.junit.jupiter.api.Test;
 /**
  * @author Daniel Lavoie
  */
-class RestTemplateTransportClientFactoryTest {
+class RestTemplateTransportClientFactoryTests {
 
 	private RestTemplateTransportClientFactory transportClientFatory;