Support scoped @ControllerAdvice beans again

Spring Framework 5.2 introduced support for implementing the Ordered
interface in a @ControllerAdvice bean. This support requires that
@ControllerAdvice beans be eagerly resolved from the BeanFactory in
order to invoke the getOrder() method defined in the Ordered interface.
Unfortunately doing so resulted in a regression in that an attempt to
eagerly resolve a scoped @ControllerAdvice bean throws a
BeanCreationException due to the lack of an active scope (e.g., request
or session scope).

This commit fixes this regression by avoiding eager resolution of scoped
@ControllerAdvice beans. As a direct consequence, the Ordered interface
is not supported for scoped @ControllerAdvice beans.

Closes gh-23985

spring-webmvc/src/test/java/org/springframework/web/servlet/mvc/method/annotation/RequestScopedControllerAdviceIntegrationTests.java

@@ -0,0 +1,91 @@
+/*
+ * Copyright 2002-2019 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.web.servlet.mvc.method.annotation;
+
+import java.util.List;
+
+import org.junit.jupiter.api.Test;
+
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Configuration;
+import org.springframework.core.Ordered;
+import org.springframework.core.annotation.Order;
+import org.springframework.mock.web.test.MockServletContext;
+import org.springframework.web.bind.annotation.ControllerAdvice;
+import org.springframework.web.context.annotation.RequestScope;
+import org.springframework.web.context.support.AnnotationConfigWebApplicationContext;
+import org.springframework.web.method.ControllerAdviceBean;
+import org.springframework.web.servlet.config.annotation.EnableWebMvc;
+
+import static org.assertj.core.api.Assertions.assertThat;
+import static org.assertj.core.api.Assertions.assertThatCode;
+
+/**
+ * Integration tests for request-scoped {@link ControllerAdvice @ControllerAdvice} beans.
+ *
+ * @author Sam Brannen
+ * @since 5.2.2
+ */
+class RequestScopedControllerAdviceIntegrationTests {
+
+	@Test // gh-23985
+	@SuppressWarnings({ "rawtypes", "unchecked" })
+	void loadContextWithRequestScopedControllerAdvice() {
+		AnnotationConfigWebApplicationContext context = new AnnotationConfigWebApplicationContext();
+		context.setServletContext(new MockServletContext());
+		context.register(Config.class);
+
+		assertThatCode(context::refresh).doesNotThrowAnyException();
+
+		// Until gh-24017 is fixed, we expect the RequestScopedControllerAdvice to show up twice.
+		Class[] expectedTypes = { RequestScopedControllerAdvice.class, RequestScopedControllerAdvice.class };
+
+		List<ControllerAdviceBean> adviceBeans = ControllerAdviceBean.findAnnotatedBeans(context);
+		assertThat(adviceBeans)//
+				.extracting(ControllerAdviceBean::getBeanType)//
+				.containsExactly(expectedTypes);
+
+		assertThat(adviceBeans)//
+				.extracting(ControllerAdviceBean::getOrder)//
+				.containsExactly(42, 42);
+
+		context.close();
+	}
+
+
+	@Configuration
+	@EnableWebMvc
+	static class Config {
+
+		@Bean
+		@RequestScope
+		RequestScopedControllerAdvice requestScopedControllerAdvice() {
+			return new RequestScopedControllerAdvice();
+		}
+	}
+
+	@ControllerAdvice
+	@Order(42)
+	static class RequestScopedControllerAdvice implements Ordered {
+
+		@Override
+		public int getOrder() {
+			return 99;
+		}
+	}
+
+}