Merge pull request #34332 from terminux

* pr/34332:
  Polish "Disable embedded web auto-config when not using embedded web server"
  Disable embedded web auto-config when not using embedded web server

Closes gh-34332

spring-boot-project/spring-boot-autoconfigure/src/main/java/org/springframework/boot/autoconfigure/condition/ConditionalOnNotWarDeployment.java

@@ -0,0 +1,41 @@
+/*
+ * Copyright 2012-2023 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.condition;
+
+import java.lang.annotation.Documented;
+import java.lang.annotation.ElementType;
+import java.lang.annotation.Retention;
+import java.lang.annotation.RetentionPolicy;
+import java.lang.annotation.Target;
+
+import org.springframework.context.annotation.Conditional;
+
+/**
+ * {@link Conditional @Conditional} that only matches when the application is not a
+ * traditional WAR deployment. For applications with embedded servers, this condition will
+ * return true.
+ *
+ * @author Guirong Hu
+ * @since 2.7.10
+ */
+@Target({ ElementType.TYPE, ElementType.METHOD })
+@Retention(RetentionPolicy.RUNTIME)
+@Documented
+@Conditional(OnWarDeploymentCondition.class)
+public @interface ConditionalOnNotWarDeployment {
+
+}

spring-boot-project/spring-boot-autoconfigure/src/main/java/org/springframework/boot/autoconfigure/condition/OnWarDeploymentCondition.java

@@ -29,20 +29,23 @@ import org.springframework.web.context.WebApplicationContext;
  * deployment.
  *
  * @author Madhura Bhave
+ * @see ConditionalOnWarDeployment
+ * @see ConditionalOnNotWarDeployment
  */
 class OnWarDeploymentCondition extends SpringBootCondition {
 
 	@Override
 	public ConditionOutcome getMatchOutcome(ConditionContext context, AnnotatedTypeMetadata metadata) {
+		boolean required = metadata.isAnnotated(ConditionalOnWarDeployment.class.getName());
 		ResourceLoader resourceLoader = context.getResourceLoader();
 		if (resourceLoader instanceof WebApplicationContext) {
 			WebApplicationContext applicationContext = (WebApplicationContext) resourceLoader;
 			ServletContext servletContext = applicationContext.getServletContext();
 			if (servletContext != null) {
-				return ConditionOutcome.match("Application is deployed as a WAR file.");
+				return new ConditionOutcome(required, "Application is deployed as a WAR file.");
 			}
 		}
-		return ConditionOutcome.noMatch(ConditionMessage.forCondition(ConditionalOnWarDeployment.class)
+		return new ConditionOutcome(!required, ConditionMessage.forCondition(ConditionalOnWarDeployment.class)
 			.because("the application is not deployed as a WAR file."));
 	}
 

spring-boot-project/spring-boot-autoconfigure/src/main/java/org/springframework/boot/autoconfigure/web/embedded/EmbeddedWebServerFactoryCustomizerAutoConfiguration.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2012-2022 the original author or authors.
+ * Copyright 2012-2023 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.
@@ -28,6 +28,7 @@ import reactor.netty.http.server.HttpServer;
 import org.springframework.boot.autoconfigure.AutoConfiguration;
 import org.springframework.boot.autoconfigure.EnableAutoConfiguration;
 import org.springframework.boot.autoconfigure.condition.ConditionalOnClass;
+import org.springframework.boot.autoconfigure.condition.ConditionalOnNotWarDeployment;
 import org.springframework.boot.autoconfigure.condition.ConditionalOnWebApplication;
 import org.springframework.boot.autoconfigure.web.ServerProperties;
 import org.springframework.boot.context.properties.EnableConfigurationProperties;
@@ -43,6 +44,7 @@ import org.springframework.core.env.Environment;
  * @since 2.0.0
  */
 @AutoConfiguration
+@ConditionalOnNotWarDeployment
 @ConditionalOnWebApplication
 @EnableConfigurationProperties(ServerProperties.class)
 public class EmbeddedWebServerFactoryCustomizerAutoConfiguration {

spring-boot-project/spring-boot-autoconfigure/src/test/java/org/springframework/boot/autoconfigure/condition/ConditionalOnNotWarDeploymentTests.java

@@ -0,0 +1,77 @@
+/*
+ * Copyright 2012-2023 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.condition;
+
+import org.junit.jupiter.api.Test;
+
+import org.springframework.boot.test.context.runner.ApplicationContextRunner;
+import org.springframework.boot.test.context.runner.ReactiveWebApplicationContextRunner;
+import org.springframework.boot.test.context.runner.WebApplicationContextRunner;
+import org.springframework.boot.web.servlet.context.AnnotationConfigServletWebApplicationContext;
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Configuration;
+
+import static org.assertj.core.api.Assertions.assertThat;
+
+/**
+ * Tests for {@link ConditionalOnNotWarDeployment @ConditionalOnNotWarDeployment}.
+ *
+ * @author Guirong Hu
+ */
+class ConditionalOnNotWarDeploymentTests {
+
+	@Test
+	void nonWebApplicationShouldMatch() {
+		ApplicationContextRunner contextRunner = new ApplicationContextRunner();
+		contextRunner.withUserConfiguration(NotWarDeploymentConfiguration.class)
+			.run((context) -> assertThat(context).hasBean("notForWar"));
+	}
+
+	@Test
+	void reactiveWebApplicationShouldMatch() {
+		ReactiveWebApplicationContextRunner contextRunner = new ReactiveWebApplicationContextRunner();
+		contextRunner.withUserConfiguration(NotWarDeploymentConfiguration.class)
+			.run((context) -> assertThat(context).hasBean("notForWar"));
+	}
+
+	@Test
+	void embeddedServletWebApplicationShouldMatch() {
+		WebApplicationContextRunner contextRunner = new WebApplicationContextRunner(
+				AnnotationConfigServletWebApplicationContext::new);
+		contextRunner.withUserConfiguration(NotWarDeploymentConfiguration.class)
+			.run((context) -> assertThat(context).hasBean("notForWar"));
+	}
+
+	@Test
+	void warDeployedServletWebApplicationShouldNotMatch() {
+		WebApplicationContextRunner contextRunner = new WebApplicationContextRunner();
+		contextRunner.withUserConfiguration(NotWarDeploymentConfiguration.class)
+			.run((context) -> assertThat(context).doesNotHaveBean("notForWar"));
+	}
+
+	@Configuration(proxyBeanMethods = false)
+	@ConditionalOnNotWarDeployment
+	static class NotWarDeploymentConfiguration {
+
+		@Bean
+		String notForWar() {
+			return "notForWar";
+		}
+
+	}
+
+}

spring-boot-project/spring-boot-docs/src/docs/asciidoc/features/developing-auto-configuration.adoc

@@ -125,12 +125,12 @@ Resources can be specified by using the usual Spring conventions, as shown in th
 
 [[features.developing-auto-configuration.condition-annotations.web-application-conditions]]
 ==== Web Application Conditions
-The `@ConditionalOnWebApplication` and `@ConditionalOnNotWebApplication` annotations let configuration be included depending on whether the application is a "`web application`".
+The `@ConditionalOnWebApplication` and `@ConditionalOnNotWebApplication` annotations let configuration be included depending on whether the application is a web application.
 A servlet-based web application is any application that uses a Spring `WebApplicationContext`, defines a `session` scope, or has a `ConfigurableWebEnvironment`.
 A reactive web application is any application that uses a `ReactiveWebApplicationContext`, or has a `ConfigurableReactiveWebEnvironment`.
 
-The `@ConditionalOnWarDeployment` annotation lets configuration be included depending on whether the application is a traditional WAR application that is deployed to a container.
-This condition will not match for applications that are run with an embedded server.
+The `@ConditionalOnWarDeployment` and `@ConditionalOnNotWarDeployment` annotations let configuration be included depending on whether the application is a traditional WAR application that is deployed to a servlet container.
+This condition will not match for applications that are run with an embedded web server.