Drop spring-boot-validation from spring-boot-actuator

Remove the validation dependency since it was only used for tests and
we can wire things up directly instead.

See gh-46357

module/spring-boot-actuator/build.gradle

@@ -30,7 +30,6 @@ dependencies {
 	optional(project(":module:spring-boot-health"))
 	optional(project(":module:spring-boot-http-converter"))
 	optional(project(":module:spring-boot-jsonb"))
-	optional(project(":module:spring-boot-validation"))
 	optional("com.github.ben-manes.caffeine:caffeine")
 	optional("com.google.code.findbugs:jsr305")
 	optional("com.zaxxer:HikariCP")

module/spring-boot-actuator/src/test/java/org/springframework/boot/actuate/endpoint/web/annotation/ControllerEndpointDiscovererTests.java

@@ -21,23 +21,30 @@ import java.util.Collections;
 import java.util.List;
 import java.util.function.Consumer;
 
+import jakarta.validation.Validator;
 import org.junit.jupiter.api.Test;
 
 import org.springframework.aot.hint.MemberCategory;
 import org.springframework.aot.hint.RuntimeHints;
 import org.springframework.aot.hint.predicate.RuntimeHintsPredicates;
+import org.springframework.beans.factory.ObjectProvider;
+import org.springframework.beans.factory.config.BeanDefinition;
 import org.springframework.boot.actuate.endpoint.EndpointId;
 import org.springframework.boot.actuate.endpoint.annotation.DiscoveredEndpoint;
 import org.springframework.boot.actuate.endpoint.annotation.Endpoint;
 import org.springframework.boot.actuate.endpoint.annotation.ReadOperation;
-import org.springframework.boot.autoconfigure.AutoConfigurations;
 import org.springframework.boot.test.context.assertj.AssertableApplicationContext;
 import org.springframework.boot.test.context.runner.ApplicationContextRunner;
 import org.springframework.boot.test.context.runner.ContextConsumer;
-import org.springframework.boot.validation.autoconfigure.ValidationAutoConfiguration;
+import org.springframework.context.ApplicationContext;
+import org.springframework.context.annotation.Bean;
 import org.springframework.context.annotation.Configuration;
 import org.springframework.context.annotation.Import;
+import org.springframework.context.annotation.Role;
+import org.springframework.util.ClassUtils;
 import org.springframework.validation.annotation.Validated;
+import org.springframework.validation.beanvalidation.LocalValidatorFactoryBean;
+import org.springframework.validation.beanvalidation.MethodValidationPostProcessor;
 
 import static org.assertj.core.api.Assertions.assertThat;
 import static org.assertj.core.api.Assertions.assertThatIllegalStateException;
@@ -68,14 +75,14 @@ class ControllerEndpointDiscovererTests {
 			ExposableControllerEndpoint endpoint = endpoints.iterator().next();
 			assertThat(endpoint.getEndpointId()).isEqualTo(EndpointId.of("testcontroller"));
 			assertThat(endpoint.getController()).isInstanceOf(TestControllerEndpoint.class);
+			assertThat(ClassUtils.isCglibProxy(endpoint.getController())).isFalse();
 			assertThat(endpoint).isInstanceOf(DiscoveredEndpoint.class);
 		}));
 	}
 
 	@Test
 	void getEndpointsShouldDiscoverProxyControllerEndpoints() {
-		this.contextRunner.withUserConfiguration(TestProxyControllerEndpoint.class)
-			.withConfiguration(AutoConfigurations.of(ValidationAutoConfiguration.class))
+		this.contextRunner.withUserConfiguration(ProxyBeanConfiguration.class, TestProxyControllerEndpoint.class)
 			.run(assertDiscoverer((discoverer) -> {
 				Collection<ExposableControllerEndpoint> endpoints = discoverer.getEndpoints();
 				assertThat(endpoints).hasSize(1);
@@ -83,6 +90,7 @@ class ControllerEndpointDiscovererTests {
 				assertThat(endpoint.getEndpointId()).isEqualTo(EndpointId.of("testcontroller"));
 				assertThat(endpoint.getController()).isInstanceOf(TestProxyControllerEndpoint.class);
 				assertThat(endpoint).isInstanceOf(DiscoveredEndpoint.class);
+				assertThat(ClassUtils.isCglibProxy(endpoint.getController())).isTrue();
 			}));
 	}
 
@@ -95,19 +103,20 @@ class ControllerEndpointDiscovererTests {
 				ExposableControllerEndpoint endpoint = endpoints.iterator().next();
 				assertThat(endpoint.getEndpointId()).isEqualTo(EndpointId.of("testrestcontroller"));
 				assertThat(endpoint.getController()).isInstanceOf(TestRestControllerEndpoint.class);
+				assertThat(ClassUtils.isCglibProxy(endpoint.getController())).isFalse();
 			}));
 	}
 
 	@Test
 	void getEndpointsShouldDiscoverProxyRestControllerEndpoints() {
-		this.contextRunner.withUserConfiguration(TestProxyRestControllerEndpoint.class)
-			.withConfiguration(AutoConfigurations.of(ValidationAutoConfiguration.class))
+		this.contextRunner.withUserConfiguration(ProxyBeanConfiguration.class, TestProxyRestControllerEndpoint.class)
 			.run(assertDiscoverer((discoverer) -> {
 				Collection<ExposableControllerEndpoint> endpoints = discoverer.getEndpoints();
 				assertThat(endpoints).hasSize(1);
 				ExposableControllerEndpoint endpoint = endpoints.iterator().next();
 				assertThat(endpoint.getEndpointId()).isEqualTo(EndpointId.of("testrestcontroller"));
 				assertThat(endpoint.getController()).isInstanceOf(TestProxyRestControllerEndpoint.class);
+				assertThat(ClassUtils.isCglibProxy(endpoint.getController())).isTrue();
 				assertThat(endpoint).isInstanceOf(DiscoveredEndpoint.class);
 			}));
 	}
@@ -197,4 +206,22 @@ class ControllerEndpointDiscovererTests {
 
 	}
 
+	static class ProxyBeanConfiguration {
+
+		@Bean
+		@Role(BeanDefinition.ROLE_INFRASTRUCTURE)
+		static LocalValidatorFactoryBean defaultValidator(ApplicationContext applicationContext) {
+			return new LocalValidatorFactoryBean();
+		}
+
+		@Bean
+		static MethodValidationPostProcessor methodValidationPostProcessor(ObjectProvider<Validator> validator) {
+			MethodValidationPostProcessor processor = new MethodValidationPostProcessor();
+			processor.setProxyTargetClass(true);
+			processor.setValidatorProvider(validator);
+			return processor;
+		}
+
+	}
+
 }

module/spring-boot-actuator/src/test/java/org/springframework/boot/actuate/endpoint/web/annotation/ServletEndpointDiscovererTests.java

@@ -27,9 +27,12 @@ import jakarta.servlet.GenericServlet;
 import jakarta.servlet.ServletException;
 import jakarta.servlet.ServletRequest;
 import jakarta.servlet.ServletResponse;
+import jakarta.validation.ValidatorFactory;
+import org.assertj.core.extractor.Extractors;
 import org.jspecify.annotations.Nullable;
 import org.junit.jupiter.api.Test;
 
+import org.springframework.aop.framework.ProxyFactory;
 import org.springframework.aot.hint.MemberCategory;
 import org.springframework.aot.hint.RuntimeHints;
 import org.springframework.aot.hint.predicate.RuntimeHintsPredicates;
@@ -39,14 +42,15 @@ import org.springframework.boot.actuate.endpoint.annotation.Endpoint;
 import org.springframework.boot.actuate.endpoint.annotation.ReadOperation;
 import org.springframework.boot.actuate.endpoint.web.EndpointServlet;
 import org.springframework.boot.actuate.endpoint.web.ExposableServletEndpoint;
-import org.springframework.boot.autoconfigure.AutoConfigurations;
 import org.springframework.boot.test.context.assertj.AssertableApplicationContext;
 import org.springframework.boot.test.context.runner.ApplicationContextRunner;
 import org.springframework.boot.test.context.runner.ContextConsumer;
-import org.springframework.boot.validation.autoconfigure.ValidationAutoConfiguration;
 import org.springframework.context.annotation.Configuration;
 import org.springframework.context.annotation.Import;
+import org.springframework.util.ClassUtils;
 import org.springframework.validation.annotation.Validated;
+import org.springframework.validation.beanvalidation.LocalValidatorFactoryBean;
+import org.springframework.validation.beanvalidation.MethodValidationInterceptor;
 
 import static org.assertj.core.api.Assertions.assertThat;
 import static org.assertj.core.api.Assertions.assertThatIllegalStateException;
@@ -77,20 +81,22 @@ class ServletEndpointDiscovererTests {
 			ExposableServletEndpoint endpoint = endpoints.iterator().next();
 			assertThat(endpoint.getEndpointId()).isEqualTo(EndpointId.of("testservlet"));
 			assertThat(endpoint.getEndpointServlet()).isNotNull();
+			Object servlet = Extractors.byName("servlet").apply(endpoint.getEndpointServlet());
+			assertThat(ClassUtils.isCglibProxy(servlet)).isFalse();
 			assertThat(endpoint).isInstanceOf(DiscoveredEndpoint.class);
 		}));
 	}
 
 	@Test
 	void getEndpointsShouldDiscoverProxyServletEndpoints() {
-		this.contextRunner.withUserConfiguration(TestProxyServletEndpoint.class)
-			.withConfiguration(AutoConfigurations.of(ValidationAutoConfiguration.class))
-			.run(assertDiscoverer((discoverer) -> {
+		this.contextRunner.withUserConfiguration(TestProxyServletEndpoint.class).run(assertDiscoverer((discoverer) -> {
 			Collection<ExposableServletEndpoint> endpoints = discoverer.getEndpoints();
 			assertThat(endpoints).hasSize(1);
 			ExposableServletEndpoint endpoint = endpoints.iterator().next();
 			assertThat(endpoint.getEndpointId()).isEqualTo(EndpointId.of("testservlet"));
 			assertThat(endpoint.getEndpointServlet()).isNotNull();
+			Object servlet = Extractors.byName("servlet").apply(endpoint.getEndpointServlet());
+			assertThat(ClassUtils.isCglibProxy(servlet)).isTrue();
 			assertThat(endpoint).isInstanceOf(DiscoveredEndpoint.class);
 		}));
 	}
@@ -179,7 +185,17 @@ class ServletEndpointDiscovererTests {
 
 		@Override
 		public EndpointServlet get() {
-			return new EndpointServlet(TestServlet.class);
+			ValidatorFactory validator = new LocalValidatorFactoryBean();
+			TestServlet target = new TestServlet();
+			MethodValidationInterceptor interceptor = new MethodValidationInterceptor(validator);
+			ProxyFactory proxyFactory = new ProxyFactory();
+			proxyFactory.setTargetClass(EndpointServlet.class);
+			proxyFactory.setTarget(target);
+			proxyFactory.setProxyTargetClass(true);
+			proxyFactory.addAdvice(interceptor);
+			proxyFactory.getProxy();
+			TestServlet servlet = (TestServlet) proxyFactory.getProxy();
+			return new EndpointServlet(servlet);
 		}
 
 	}