Add runtime hints for scheduling support

Closes gh-28696

spring-context/src/main/java/org/springframework/scheduling/annotation/Scheduled.java

@@ -24,6 +24,7 @@ import java.lang.annotation.RetentionPolicy;
 import java.lang.annotation.Target;
 import java.util.concurrent.TimeUnit;
 
+import org.springframework.aot.hint.annotation.Reflective;
 import org.springframework.scheduling.config.ScheduledTaskRegistrar;
 
 /**
@@ -61,6 +62,7 @@ import org.springframework.scheduling.config.ScheduledTaskRegistrar;
 @Retention(RetentionPolicy.RUNTIME)
 @Documented
 @Repeatable(Schedules.class)
+@Reflective
 public @interface Scheduled {
 
 	/**

spring-context/src/main/java/org/springframework/scheduling/annotation/ScheduledAnnotationBeanPostProcessor.java

@@ -55,6 +55,7 @@ import org.springframework.context.ApplicationContext;
 import org.springframework.context.ApplicationContextAware;
 import org.springframework.context.ApplicationListener;
 import org.springframework.context.EmbeddedValueResolverAware;
+import org.springframework.context.annotation.ImportRuntimeHints;
 import org.springframework.context.event.ContextRefreshedEvent;
 import org.springframework.core.MethodIntrospector;
 import org.springframework.core.Ordered;
@@ -106,6 +107,7 @@ import org.springframework.util.StringValueResolver;
  * @see org.springframework.scheduling.config.ScheduledTaskRegistrar
  * @see AsyncAnnotationBeanPostProcessor
  */
+@ImportRuntimeHints(ScheduledAnnotationRuntimeHintsRegistrar.class)
 public class ScheduledAnnotationBeanPostProcessor
 		implements ScheduledTaskHolder, MergedBeanDefinitionPostProcessor, DestructionAwareBeanPostProcessor,
 		Ordered, EmbeddedValueResolverAware, BeanNameAware, BeanFactoryAware, ApplicationContextAware,

spring-context/src/main/java/org/springframework/scheduling/annotation/ScheduledAnnotationRuntimeHintsRegistrar.java

@@ -0,0 +1,37 @@
+/*
+ * Copyright 2002-2022 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.scheduling.annotation;
+
+import org.springframework.aot.hint.RuntimeHints;
+import org.springframework.aot.hint.RuntimeHintsRegistrar;
+import org.springframework.aot.hint.support.RuntimeHintsUtils;
+
+/**
+ * {@link RuntimeHintsRegistrar} implementation that registers runtime hints for
+ * {@link Scheduled} annotation.
+ *
+ * @author Sebastien Deleuze
+ * @since 6.0
+ */
+public class ScheduledAnnotationRuntimeHintsRegistrar implements RuntimeHintsRegistrar {
+
+	@Override
+	public void registerHints(RuntimeHints hints, ClassLoader classLoader) {
+		RuntimeHintsUtils.registerAnnotation(hints, Scheduled.class);
+		RuntimeHintsUtils.registerAnnotation(hints, Schedules.class);
+	}
+}

spring-context/src/main/java/org/springframework/scheduling/annotation/Schedules.java

@@ -22,6 +22,8 @@ import java.lang.annotation.Retention;
 import java.lang.annotation.RetentionPolicy;
 import java.lang.annotation.Target;
 
+import org.springframework.aot.hint.annotation.Reflective;
+
 /**
  * Container annotation that aggregates several {@link Scheduled} annotations.
  *
@@ -40,6 +42,7 @@ import java.lang.annotation.Target;
 @Target({ElementType.METHOD, ElementType.ANNOTATION_TYPE})
 @Retention(RetentionPolicy.RUNTIME)
 @Documented
+@Reflective
 public @interface Schedules {
 
 	Scheduled[] value();