Add AOT support for actuator

Mainly adds reflection hints for the actuator infrastructure.
Also adds the OperationReflectiveProcessor, which registers the
@ReadMethod, @DeleteMethod and @WriteMethod annotated methods for
reflection and adds reflection hints for method return types.

See gh-31671

Author: mhalbritter

spring-boot-project/spring-boot-actuator-autoconfigure/src/main/java/org/springframework/boot/actuate/autoconfigure/cloudfoundry/CloudFoundryWebEndpointDiscoverer.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2012-2020 the original author or authors.
+ * Copyright 2012-2022 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.
@@ -19,6 +19,10 @@
 import java.util.Collection;
 import java.util.List;
 
+import org.springframework.aot.hint.MemberCategory;
+import org.springframework.aot.hint.RuntimeHints;
+import org.springframework.aot.hint.RuntimeHintsRegistrar;
+import org.springframework.boot.actuate.autoconfigure.cloudfoundry.CloudFoundryWebEndpointDiscoverer.CloudFoundryWebEndpointDiscovererRuntimeHints;
 import org.springframework.boot.actuate.endpoint.EndpointFilter;
 import org.springframework.boot.actuate.endpoint.invoke.OperationInvokerAdvisor;
 import org.springframework.boot.actuate.endpoint.invoke.ParameterValueMapper;
@@ -29,6 +33,7 @@
 import org.springframework.boot.actuate.endpoint.web.annotation.WebEndpointDiscoverer;
 import org.springframework.boot.actuate.health.HealthEndpoint;
 import org.springframework.context.ApplicationContext;
+import org.springframework.context.annotation.ImportRuntimeHints;
 import org.springframework.core.annotation.MergedAnnotations;
 
 /**
@@ -38,6 +43,7 @@
  * @author Madhura Bhave
  * @since 2.0.0
  */
+@ImportRuntimeHints(CloudFoundryWebEndpointDiscovererRuntimeHints.class)
 public class CloudFoundryWebEndpointDiscoverer extends WebEndpointDiscoverer {
 
 	/**
@@ -75,4 +81,14 @@ private boolean isCloudFoundryHealthEndpointExtension(Class<?> extensionBeanType
 		return MergedAnnotations.from(extensionBeanType).isPresent(EndpointCloudFoundryExtension.class);
 	}
 
+	static class CloudFoundryWebEndpointDiscovererRuntimeHints implements RuntimeHintsRegistrar {
+
+		@Override
+		public void registerHints(RuntimeHints hints, ClassLoader classLoader) {
+			hints.reflection().registerType(CloudFoundryEndpointFilter.class,
+					(hint) -> hint.withMembers(MemberCategory.INVOKE_DECLARED_CONSTRUCTORS));
+		}
+
+	}
+
 }

spring-boot-project/spring-boot-actuator-autoconfigure/src/main/java/org/springframework/boot/actuate/autoconfigure/cloudfoundry/reactive/CloudFoundryWebFluxEndpointHandlerMapping.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2012-2019 the original author or authors.
+ * Copyright 2012-2022 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.
@@ -19,14 +19,20 @@
 import java.util.Collection;
 import java.util.Collections;
 import java.util.LinkedHashMap;
+import java.util.List;
 import java.util.Map;
 import java.util.stream.Collectors;
 
 import org.reactivestreams.Publisher;
 import reactor.core.publisher.Mono;
 
+import org.springframework.aot.hint.ExecutableMode;
+import org.springframework.aot.hint.RuntimeHints;
+import org.springframework.aot.hint.RuntimeHintsRegistrar;
+import org.springframework.aot.hint.TypeReference;
 import org.springframework.boot.actuate.autoconfigure.cloudfoundry.AccessLevel;
 import org.springframework.boot.actuate.autoconfigure.cloudfoundry.SecurityResponse;
+import org.springframework.boot.actuate.autoconfigure.cloudfoundry.reactive.CloudFoundryWebFluxEndpointHandlerMapping.CloudFoundryWebFluxEndpointHandlerMappingRuntimeHints;
 import org.springframework.boot.actuate.endpoint.EndpointId;
 import org.springframework.boot.actuate.endpoint.web.EndpointLinksResolver;
 import org.springframework.boot.actuate.endpoint.web.EndpointMapping;
@@ -35,6 +41,8 @@
 import org.springframework.boot.actuate.endpoint.web.Link;
 import org.springframework.boot.actuate.endpoint.web.WebOperation;
 import org.springframework.boot.actuate.endpoint.web.reactive.AbstractWebFluxEndpointHandlerMapping;
+import org.springframework.context.annotation.ImportRuntimeHints;
+import org.springframework.context.aot.BindingReflectionHintsRegistrar;
 import org.springframework.http.HttpStatus;
 import org.springframework.http.ResponseEntity;
 import org.springframework.http.server.reactive.ServerHttpRequest;
@@ -50,6 +58,7 @@
  * @author Phillip Webb
  * @author Brian Clozel
  */
+@ImportRuntimeHints(CloudFoundryWebFluxEndpointHandlerMappingRuntimeHints.class)
 class CloudFoundryWebFluxEndpointHandlerMapping extends AbstractWebFluxEndpointHandlerMapping {
 
 	private final CloudFoundrySecurityInterceptor securityInterceptor;
@@ -145,4 +154,19 @@ private Mono<ResponseEntity<Object>> flatMapResponse(ServerWebExchange exchange,
 
 	}
 
+	static class CloudFoundryWebFluxEndpointHandlerMappingRuntimeHints implements RuntimeHintsRegistrar {
+
+		private final BindingReflectionHintsRegistrar bindingRegistrar = new BindingReflectionHintsRegistrar();
+
+		@Override
+		public void registerHints(RuntimeHints hints, ClassLoader classLoader) {
+			hints.reflection().registerType(CloudFoundryLinksHandler.class,
+					(hint) -> hint.onReachableType(TypeReference.of(CloudFoundryLinksHandler.class)).withMethod("links",
+							List.of(TypeReference.of(ServerWebExchange.class)),
+							(method) -> method.setModes(ExecutableMode.INVOKE)));
+			this.bindingRegistrar.registerReflectionHints(hints.reflection(), Link.class);
+		}
+
+	}
+
 }

spring-boot-project/spring-boot-actuator-autoconfigure/src/main/java/org/springframework/boot/actuate/autoconfigure/cloudfoundry/servlet/CloudFoundryWebEndpointServletHandlerMapping.java

@@ -19,6 +19,7 @@
 import java.util.Collection;
 import java.util.Collections;
 import java.util.LinkedHashMap;
+import java.util.List;
 import java.util.Map;
 import java.util.stream.Collectors;
 
@@ -27,8 +28,13 @@
 import org.apache.commons.logging.Log;
 import org.apache.commons.logging.LogFactory;
 
+import org.springframework.aot.hint.ExecutableMode;
+import org.springframework.aot.hint.RuntimeHints;
+import org.springframework.aot.hint.RuntimeHintsRegistrar;
+import org.springframework.aot.hint.TypeReference;
 import org.springframework.boot.actuate.autoconfigure.cloudfoundry.AccessLevel;
 import org.springframework.boot.actuate.autoconfigure.cloudfoundry.SecurityResponse;
+import org.springframework.boot.actuate.autoconfigure.cloudfoundry.servlet.CloudFoundryWebEndpointServletHandlerMapping.CloudFoundryWebEndpointServletHandlerMappingRuntimeHints;
 import org.springframework.boot.actuate.endpoint.EndpointId;
 import org.springframework.boot.actuate.endpoint.web.EndpointLinksResolver;
 import org.springframework.boot.actuate.endpoint.web.EndpointMapping;
@@ -37,6 +43,8 @@
 import org.springframework.boot.actuate.endpoint.web.Link;
 import org.springframework.boot.actuate.endpoint.web.WebOperation;
 import org.springframework.boot.actuate.endpoint.web.servlet.AbstractWebMvcEndpointHandlerMapping;
+import org.springframework.context.annotation.ImportRuntimeHints;
+import org.springframework.context.aot.BindingReflectionHintsRegistrar;
 import org.springframework.http.HttpStatus;
 import org.springframework.http.ResponseEntity;
 import org.springframework.web.bind.annotation.ResponseBody;
@@ -51,6 +59,7 @@
  * @author Phillip Webb
  * @author Brian Clozel
  */
+@ImportRuntimeHints(CloudFoundryWebEndpointServletHandlerMappingRuntimeHints.class)
 class CloudFoundryWebEndpointServletHandlerMapping extends AbstractWebMvcEndpointHandlerMapping {
 
 	private static final Log logger = LogFactory.getLog(CloudFoundryWebEndpointServletHandlerMapping.class);
@@ -147,4 +156,20 @@ public Object handle(HttpServletRequest request, Map<String, String> body) {
 
 	}
 
+	static class CloudFoundryWebEndpointServletHandlerMappingRuntimeHints implements RuntimeHintsRegistrar {
+
+		private final BindingReflectionHintsRegistrar bindingRegistrar = new BindingReflectionHintsRegistrar();
+
+		@Override
+		public void registerHints(RuntimeHints hints, ClassLoader classLoader) {
+			hints.reflection().registerType(CloudFoundryLinksHandler.class,
+					(hint) -> hint.onReachableType(TypeReference.of(CloudFoundryLinksHandler.class)).withMethod("links",
+							List.of(TypeReference.of(HttpServletRequest.class),
+									TypeReference.of(HttpServletResponse.class)),
+							(method) -> method.setModes(ExecutableMode.INVOKE)));
+			this.bindingRegistrar.registerReflectionHints(hints.reflection(), Link.class);
+		}
+
+	}
+
 }

spring-boot-project/spring-boot-actuator-autoconfigure/src/main/java/org/springframework/boot/actuate/autoconfigure/endpoint/EndpointAutoConfiguration.java

@@ -20,6 +20,7 @@
 import java.util.stream.Collectors;
 
 import org.springframework.beans.factory.ObjectProvider;
+import org.springframework.boot.actuate.aot.ActuatorAnnotationsRuntimeHintsRegistrar;
 import org.springframework.boot.actuate.endpoint.annotation.Endpoint;
 import org.springframework.boot.actuate.endpoint.annotation.EndpointConverter;
 import org.springframework.boot.actuate.endpoint.invoke.ParameterValueMapper;
@@ -30,6 +31,7 @@
 import org.springframework.boot.autoconfigure.condition.ConditionalOnMissingBean;
 import org.springframework.boot.convert.ApplicationConversionService;
 import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.ImportRuntimeHints;
 import org.springframework.core.convert.ConversionService;
 import org.springframework.core.convert.converter.Converter;
 import org.springframework.core.convert.converter.GenericConverter;
@@ -45,6 +47,7 @@
  * @since 2.0.0
  */
 @AutoConfiguration
+@ImportRuntimeHints(ActuatorAnnotationsRuntimeHintsRegistrar.class)
 public class EndpointAutoConfiguration {
 
 	@Bean

spring-boot-project/spring-boot-actuator-autoconfigure/src/main/java/org/springframework/boot/actuate/autoconfigure/management/ThreadDumpEndpointAutoConfiguration.java

@@ -17,9 +17,12 @@
 package org.springframework.boot.actuate.autoconfigure.management;
 
 import org.springframework.boot.actuate.autoconfigure.endpoint.condition.ConditionalOnAvailableEndpoint;
+import org.springframework.boot.actuate.autoconfigure.endpoint.expose.EndpointExposure;
 import org.springframework.boot.actuate.management.ThreadDumpEndpoint;
+import org.springframework.boot.actuate.management.ThreadDumpEndpointWebExtension;
 import org.springframework.boot.autoconfigure.AutoConfiguration;
 import org.springframework.boot.autoconfigure.EnableAutoConfiguration;
+import org.springframework.boot.autoconfigure.condition.ConditionalOnBean;
 import org.springframework.boot.autoconfigure.condition.ConditionalOnMissingBean;
 import org.springframework.context.annotation.Bean;
 
@@ -39,4 +42,12 @@ public ThreadDumpEndpoint dumpEndpoint() {
 		return new ThreadDumpEndpoint();
 	}
 
+	@Bean
+	@ConditionalOnMissingBean
+	@ConditionalOnBean(ThreadDumpEndpoint.class)
+	@ConditionalOnAvailableEndpoint(exposure = { EndpointExposure.WEB, EndpointExposure.CLOUD_FOUNDRY })
+	public ThreadDumpEndpointWebExtension threadDumpWebExtension(ThreadDumpEndpoint threadDumpEndpoint) {
+		return new ThreadDumpEndpointWebExtension(threadDumpEndpoint);
+	}
+
 }

spring-boot-project/spring-boot-actuator-autoconfigure/src/test/java/org/springframework/boot/actuate/autoconfigure/cloudfoundry/CloudFoundryWebEndpointDiscovererRuntimeHintsTests.java

@@ -0,0 +1,45 @@
+/*
+ * Copyright 2012-2022 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.boot.actuate.autoconfigure.cloudfoundry;
+
+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.boot.actuate.autoconfigure.cloudfoundry.CloudFoundryWebEndpointDiscoverer.CloudFoundryWebEndpointDiscovererRuntimeHints;
+
+import static org.assertj.core.api.Assertions.assertThat;
+
+/**
+ * Tests for {@link CloudFoundryWebEndpointDiscovererRuntimeHints}.
+ *
+ * @author Moritz Halbritter
+ */
+class CloudFoundryWebEndpointDiscovererRuntimeHintsTests {
+
+	private final CloudFoundryWebEndpointDiscovererRuntimeHints sut = new CloudFoundryWebEndpointDiscovererRuntimeHints();
+
+	@Test
+	void shouldRegisterHints() {
+		RuntimeHints runtimeHints = new RuntimeHints();
+		this.sut.registerHints(runtimeHints, getClass().getClassLoader());
+		assertThat(RuntimeHintsPredicates.reflection().onType(CloudFoundryEndpointFilter.class)
+				.withMemberCategories(MemberCategory.INVOKE_DECLARED_CONSTRUCTORS)).accepts(runtimeHints);
+	}
+
+}

spring-boot-project/spring-boot-actuator-autoconfigure/src/test/java/org/springframework/boot/actuate/autoconfigure/cloudfoundry/reactive/CloudFoundryWebFluxEndpointHandlerMappingRuntimeHintsTests.java

@@ -0,0 +1,46 @@
+/*
+ * Copyright 2012-2022 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.boot.actuate.autoconfigure.cloudfoundry.reactive;
+
+import org.assertj.core.api.Assertions;
+import org.junit.jupiter.api.Test;
+
+import org.springframework.aot.hint.RuntimeHints;
+import org.springframework.aot.hint.predicate.RuntimeHintsPredicates;
+import org.springframework.boot.actuate.autoconfigure.cloudfoundry.reactive.CloudFoundryWebFluxEndpointHandlerMapping.CloudFoundryLinksHandler;
+import org.springframework.boot.actuate.autoconfigure.cloudfoundry.reactive.CloudFoundryWebFluxEndpointHandlerMapping.CloudFoundryWebFluxEndpointHandlerMappingRuntimeHints;
+import org.springframework.boot.actuate.endpoint.web.Link;
+
+/**
+ * Tests for {@link CloudFoundryWebFluxEndpointHandlerMappingRuntimeHints}.
+ *
+ * @author Moritz Halbritter
+ */
+class CloudFoundryWebFluxEndpointHandlerMappingRuntimeHintsTests {
+
+	private final CloudFoundryWebFluxEndpointHandlerMappingRuntimeHints sut = new CloudFoundryWebFluxEndpointHandlerMappingRuntimeHints();
+
+	@Test
+	void shouldRegisterHints() {
+		RuntimeHints runtimeHints = new RuntimeHints();
+		this.sut.registerHints(runtimeHints, getClass().getClassLoader());
+		Assertions.assertThat(RuntimeHintsPredicates.reflection().onMethod(CloudFoundryLinksHandler.class, "links"))
+				.accepts(runtimeHints);
+		Assertions.assertThat(RuntimeHintsPredicates.reflection().onType(Link.class)).accepts(runtimeHints);
+	}
+
+}

spring-boot-project/spring-boot-actuator-autoconfigure/src/test/java/org/springframework/boot/actuate/autoconfigure/cloudfoundry/servlet/CloudFoundryWebEndpointServletHandlerMappingRuntimeHintsTests.java

@@ -0,0 +1,47 @@
+/*
+ * Copyright 2012-2022 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.boot.actuate.autoconfigure.cloudfoundry.servlet;
+
+import org.junit.jupiter.api.Test;
+
+import org.springframework.aot.hint.RuntimeHints;
+import org.springframework.aot.hint.predicate.RuntimeHintsPredicates;
+import org.springframework.boot.actuate.autoconfigure.cloudfoundry.servlet.CloudFoundryWebEndpointServletHandlerMapping.CloudFoundryLinksHandler;
+import org.springframework.boot.actuate.autoconfigure.cloudfoundry.servlet.CloudFoundryWebEndpointServletHandlerMapping.CloudFoundryWebEndpointServletHandlerMappingRuntimeHints;
+import org.springframework.boot.actuate.endpoint.web.Link;
+
+import static org.assertj.core.api.Assertions.assertThat;
+
+/**
+ * Tests for {@link CloudFoundryWebEndpointServletHandlerMappingRuntimeHints}.
+ *
+ * @author Moritz Halbritter
+ */
+class CloudFoundryWebEndpointServletHandlerMappingRuntimeHintsTests {
+
+	private final CloudFoundryWebEndpointServletHandlerMappingRuntimeHints sut = new CloudFoundryWebEndpointServletHandlerMappingRuntimeHints();
+
+	@Test
+	void shouldRegisterHints() {
+		RuntimeHints runtimeHints = new RuntimeHints();
+		this.sut.registerHints(runtimeHints, getClass().getClassLoader());
+		assertThat(RuntimeHintsPredicates.reflection().onMethod(CloudFoundryLinksHandler.class, "links"))
+				.accepts(runtimeHints);
+		assertThat(RuntimeHintsPredicates.reflection().onType(Link.class)).accepts(runtimeHints);
+	}
+
+}