Deprecate LiveBeansView

This commit deprecates LiveBeansView and related classes in order to allow
a future removal in order to increase the separation of concerns between
Spring Framework and Spring Boot, and the consistency between JVM
and native.

Closes gh-25820

spring-context/src/main/java/org/springframework/context/support/AbstractApplicationContext.java

@@ -930,6 +930,7 @@ public abstract class AbstractApplicationContext extends DefaultResourceLoader
 	 * onRefresh() method and publishing the
 	 * {@link org.springframework.context.event.ContextRefreshedEvent}.
 	 */
+	@SuppressWarnings("deprecation")
 	protected void finishRefresh() {
 		// Clear context-level resource caches (such as ASM metadata from scanning).
 		clearResourceCaches();
@@ -1047,6 +1048,7 @@ public abstract class AbstractApplicationContext extends DefaultResourceLoader
 	 * @see #close()
 	 * @see #registerShutdownHook()
 	 */
+	@SuppressWarnings("deprecation")
 	protected void doClose() {
 		// Check whether an actual close attempt is necessary...
 		if (this.active.get() && this.closed.compareAndSet(false, true)) {

spring-context/src/main/java/org/springframework/context/support/LiveBeansView.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2018 the original author or authors.
+ * Copyright 2002-2020 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.
@@ -42,15 +42,14 @@ import org.springframework.util.StringUtils;
  * local {@code LiveBeansView} bean definition) or all registered ApplicationContexts
  * (driven by the {@value #MBEAN_DOMAIN_PROPERTY_NAME} environment property).
  *
- * <p>Note: This feature is still in beta and primarily designed for use with
- * Spring Tool Suite 3.1 and higher.
- *
  * @author Juergen Hoeller
  * @author Stephane Nicoll
  * @since 3.2
  * @see #getSnapshotAsJson()
  * @see org.springframework.web.context.support.LiveBeansViewServlet
+ * @deprecated as of 5.3, in favor of using Spring Boot actuators for such need.
  */
+@Deprecated
 public class LiveBeansView implements LiveBeansViewMBean, ApplicationContextAware {
 
 	/**

spring-context/src/main/java/org/springframework/context/support/LiveBeansViewMBean.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2012 the original author or authors.
+ * Copyright 2002-2020 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.
@@ -21,7 +21,9 @@ package org.springframework.context.support;
  *
  * @author Juergen Hoeller
  * @since 3.2
+ * @deprecated as of 5.3, in favor of using Spring Boot actuators for such need.
  */
+@Deprecated
 public interface LiveBeansViewMBean {
 
 	/**