Exclude beans with scheduled methods from global lazy init

This commit updates TaskSchedulingAutoConfiguration to contribute a
LazyInitializationExcludeFilter that processes beans that have
@Scheduled methods. This lets them be contributed to the context so
that scheduled methods are invoked as expected.

Closes gh-25315

spring-boot-project/spring-boot-autoconfigure/src/main/java/org/springframework/boot/autoconfigure/task/ScheduledBeanLazyInitializationExcludeFilter.java

@@ -0,0 +1,78 @@
+/*
+ * Copyright 2012-2021 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.autoconfigure.task;
+
+import java.lang.reflect.Method;
+import java.util.Arrays;
+import java.util.Collections;
+import java.util.Map;
+import java.util.Set;
+import java.util.concurrent.ConcurrentHashMap;
+import java.util.concurrent.ScheduledExecutorService;
+
+import org.springframework.aop.framework.AopInfrastructureBean;
+import org.springframework.beans.factory.config.BeanDefinition;
+import org.springframework.boot.LazyInitializationExcludeFilter;
+import org.springframework.core.MethodIntrospector;
+import org.springframework.core.annotation.AnnotatedElementUtils;
+import org.springframework.core.annotation.AnnotationUtils;
+import org.springframework.scheduling.TaskScheduler;
+import org.springframework.scheduling.annotation.Scheduled;
+import org.springframework.scheduling.annotation.Schedules;
+import org.springframework.util.ClassUtils;
+
+/**
+ * A {@link LazyInitializationExcludeFilter} that detects bean methods annotated with
+ * {@link Scheduled} or {@link Schedules}.
+ *
+ * @author Stephane Nicoll
+ */
+class ScheduledBeanLazyInitializationExcludeFilter implements LazyInitializationExcludeFilter {
+
+	private final Set<Class<?>> nonAnnotatedClasses = Collections.newSetFromMap(new ConcurrentHashMap<>(64));
+
+	ScheduledBeanLazyInitializationExcludeFilter() {
+		// Ignore AOP infrastructure such as scoped proxies.
+		this.nonAnnotatedClasses.add(AopInfrastructureBean.class);
+		this.nonAnnotatedClasses.add(TaskScheduler.class);
+		this.nonAnnotatedClasses.add(ScheduledExecutorService.class);
+	}
+
+	@Override
+	public boolean isExcluded(String beanName, BeanDefinition beanDefinition, Class<?> beanType) {
+		return hasScheduledTask(beanType);
+	}
+
+	private boolean hasScheduledTask(Class<?> type) {
+		Class<?> targetType = ClassUtils.getUserClass(type);
+		if (!this.nonAnnotatedClasses.contains(targetType)
+				&& AnnotationUtils.isCandidateClass(targetType, Arrays.asList(Scheduled.class, Schedules.class))) {
+			Map<Method, Set<Scheduled>> annotatedMethods = MethodIntrospector.selectMethods(targetType,
+					(MethodIntrospector.MetadataLookup<Set<Scheduled>>) (method) -> {
+						Set<Scheduled> scheduledAnnotations = AnnotatedElementUtils
+								.getMergedRepeatableAnnotations(method, Scheduled.class, Schedules.class);
+						return (!scheduledAnnotations.isEmpty() ? scheduledAnnotations : null);
+					});
+			if (annotatedMethods.isEmpty()) {
+				this.nonAnnotatedClasses.add(targetType);
+			}
+			return !annotatedMethods.isEmpty();
+		}
+		return false;
+	}
+
+}

spring-boot-project/spring-boot-autoconfigure/src/main/java/org/springframework/boot/autoconfigure/task/TaskSchedulingAutoConfiguration.java

@@ -19,6 +19,7 @@ package org.springframework.boot.autoconfigure.task;
 import java.util.concurrent.ScheduledExecutorService;
 
 import org.springframework.beans.factory.ObjectProvider;
+import org.springframework.boot.LazyInitializationExcludeFilter;
 import org.springframework.boot.autoconfigure.AutoConfigureAfter;
 import org.springframework.boot.autoconfigure.EnableAutoConfiguration;
 import org.springframework.boot.autoconfigure.condition.ConditionalOnBean;
@@ -54,6 +55,11 @@ public class TaskSchedulingAutoConfiguration {
 		return builder.build();
 	}
 
+	@Bean
+	public static LazyInitializationExcludeFilter scheduledBeanLazyInitializationExcludeFilter() {
+		return new ScheduledBeanLazyInitializationExcludeFilter();
+	}
+
 	@Bean
 	@ConditionalOnMissingBean
 	public TaskSchedulerBuilder taskSchedulerBuilder(TaskSchedulingProperties properties,