Discover endpoints in parent context

Closes gh-10144

spring-boot/src/main/java/org/springframework/boot/endpoint/AnnotationEndpointDiscoverer.java

@@ -19,6 +19,7 @@ package org.springframework.boot.endpoint;
 import java.lang.annotation.Annotation;
 import java.lang.reflect.Method;
 import java.util.ArrayList;
+import java.util.Arrays;
 import java.util.Collection;
 import java.util.Collections;
 import java.util.HashMap;
@@ -28,6 +29,8 @@ import java.util.Map;
 import java.util.function.Consumer;
 import java.util.function.Function;
 
+import org.springframework.beans.factory.HierarchicalBeanFactory;
+import org.springframework.beans.factory.ListableBeanFactory;
 import org.springframework.context.ApplicationContext;
 import org.springframework.core.MethodIntrospector;
 import org.springframework.core.annotation.AnnotatedElementUtils;
@@ -35,6 +38,7 @@ import org.springframework.core.annotation.AnnotationAttributes;
 import org.springframework.util.Assert;
 import org.springframework.util.LinkedMultiValueMap;
 import org.springframework.util.ObjectUtils;
+import org.springframework.util.StringUtils;
 
 /**
  * A base {@link EndpointDiscoverer} implementation that discovers {@link Endpoint} beans
@@ -88,8 +92,8 @@ public abstract class AnnotationEndpointDiscoverer<T extends Operation, K>
 	}
 
 	private Map<Class<?>, EndpointInfo<T>> discoverEndpoints(EndpointExposure exposure) {
-		String[] beanNames = this.applicationContext
+		String[] beanNames = beanNamesForAnnotationIncludingAncestors(
-				.getBeanNamesForAnnotation(Endpoint.class);
+				this.applicationContext, Endpoint.class);
 		Map<Class<?>, EndpointInfo<T>> endpoints = new LinkedHashMap<>();
 		Map<String, EndpointInfo<T>> endpointsById = new LinkedHashMap<>();
 		for (String beanName : beanNames) {
@@ -121,8 +125,8 @@ public abstract class AnnotationEndpointDiscoverer<T extends Operation, K>
 		if (extensionType == null) {
 			return Collections.emptyMap();
 		}
-		String[] beanNames = this.applicationContext
+		String[] beanNames = beanNamesForAnnotationIncludingAncestors(
-				.getBeanNamesForAnnotation(extensionType);
+				this.applicationContext, extensionType);
 		Map<Class<?>, EndpointExtensionInfo<T>> extensions = new HashMap<>();
 		for (String beanName : beanNames) {
 			Class<?> beanType = this.applicationContext.getType(beanName);
@@ -150,6 +154,28 @@ public abstract class AnnotationEndpointDiscoverer<T extends Operation, K>
 
 	}
 
+	private static String[] beanNamesForAnnotationIncludingAncestors(
+			ListableBeanFactory lbf, Class<? extends Annotation> annotationType) {
+		Assert.notNull(lbf, "ListableBeanFactory must not be null");
+		String[] result = lbf.getBeanNamesForAnnotation(annotationType);
+		if (lbf instanceof HierarchicalBeanFactory) {
+			HierarchicalBeanFactory hbf = (HierarchicalBeanFactory) lbf;
+			if (hbf.getParentBeanFactory() instanceof ListableBeanFactory) {
+				String[] parentResult = beanNamesForAnnotationIncludingAncestors(
+						(ListableBeanFactory) hbf.getParentBeanFactory(), annotationType);
+				List<String> resultList = new ArrayList<>();
+				resultList.addAll(Arrays.asList(result));
+				for (String beanName : parentResult) {
+					if (!resultList.contains(beanName) && !hbf.containsLocalBean(beanName)) {
+						resultList.add(beanName);
+					}
+				}
+				result = StringUtils.toStringArray(resultList);
+			}
+		}
+		return result;
+	}
+
 	private EndpointInfo<T> getEndpointInfo(Map<Class<?>, EndpointInfo<T>> endpoints,
 			Class<?> beanType, Class<?> endpointClass) {
 		EndpointInfo<T> endpoint = endpoints.get(endpointClass);

spring-boot/src/test/java/org/springframework/boot/endpoint/AnnotationEndpointDiscovererTests.java

@@ -58,7 +58,18 @@ public class AnnotationEndpointDiscovererTests {
 
 	@Test
 	public void endpointIsDiscovered() {
-		load(TestEndpointConfiguration.class, (context) -> {
+		load(TestEndpointConfiguration.class, hasTestEndpoint());
+	}
+
+	@Test
+	public void endpointIsInParentContextIsDiscovered() {
+		AnnotationConfigApplicationContext parent =
+				new AnnotationConfigApplicationContext(TestEndpointConfiguration.class);
+		loadWithParent(parent, EmptyConfiguration.class, hasTestEndpoint());
+	}
+
+	private Consumer<AnnotationConfigApplicationContext> hasTestEndpoint() {
+		return (context) -> {
 			Map<String, EndpointInfo<TestEndpointOperation>> endpoints = mapEndpoints(
 					new TestAnnotationEndpointDiscoverer(context).discoverEndpoints());
 			assertThat(endpoints).containsOnlyKeys("test");
@@ -73,7 +84,7 @@ public class AnnotationEndpointDiscovererTests {
 							String.class),
 					ReflectionUtils.findMethod(TestEndpoint.class, "deleteOne",
 							String.class));
-		});
+		};
 	}
 
 	@Test
@@ -201,8 +212,22 @@ public class AnnotationEndpointDiscovererTests {
 
 	private void load(Class<?> configuration,
 			Consumer<AnnotationConfigApplicationContext> consumer) {
-		AnnotationConfigApplicationContext context = new AnnotationConfigApplicationContext(
+		doLoad(null, configuration, consumer);
-				configuration);
+	}
+
+	private void loadWithParent(ApplicationContext parent, Class<?> configuration,
+			Consumer<AnnotationConfigApplicationContext> consumer) {
+		doLoad(parent, configuration, consumer);
+	}
+
+	private void doLoad(ApplicationContext parent, Class<?> configuration,
+			Consumer<AnnotationConfigApplicationContext> consumer) {
+		AnnotationConfigApplicationContext context = new AnnotationConfigApplicationContext();
+		if (parent != null) {
+			context.setParent(parent);
+		}
+		context.register(configuration);
+		context.refresh();
 		try {
 			consumer.accept(context);
 		}