Polish "Add failure analyzer for missing web factory bean"

See gh-30358

spring-boot-project/spring-boot/src/main/java/org/springframework/boot/web/context/MissingWebServerFactoryBeanException.java

@@ -0,0 +1,59 @@
+/*
+ * Copyright 2012-2022 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.boot.web.context;
+
+import org.springframework.beans.factory.NoSuchBeanDefinitionException;
+import org.springframework.boot.WebApplicationType;
+import org.springframework.boot.web.server.WebServerFactory;
+
+/**
+ * Exception thrown when there is no {@link WebServerFactory} bean of the required type
+ * defined in a {@link WebServerApplicationContext}.
+ *
+ * @author Guirong Hu
+ * @author Andy Wilkinson
+ * @since 2.7.0
+ */
+public class MissingWebServerFactoryBeanException extends NoSuchBeanDefinitionException {
+
+	private final WebApplicationType webApplicationType;
+
+	/**
+	 * Create a new {@code MissingWebServerFactoryBeanException}.
+	 * @param webServerApplicationContextClass the class of the
+	 * WebServerApplicationContext that required the WebServerFactory
+	 * @param webServerFactoryClass the class of the WebServerFactory that was missing
+	 * @param webApplicationType the type of the web application
+	 */
+	public MissingWebServerFactoryBeanException(
+			Class<? extends WebServerApplicationContext> webServerApplicationContextClass,
+			Class<? extends WebServerFactory> webServerFactoryClass, WebApplicationType webApplicationType) {
+		super(webServerFactoryClass, String.format("Unable to start %s due to missing %s bean",
+				webServerApplicationContextClass.getSimpleName(), webServerFactoryClass.getSimpleName()));
+		this.webApplicationType = webApplicationType;
+	}
+
+	/**
+	 * Returns the type of web application for which a {@link WebServerFactory} bean was
+	 * missing.
+	 * @return the type of web application
+	 */
+	public WebApplicationType getWebApplicationType() {
+		return this.webApplicationType;
+	}
+
+}

spring-boot-project/spring-boot/src/main/java/org/springframework/boot/web/context/MissingWebServerFactoryBeanFailureAnalyzer.java

@@ -14,36 +14,34 @@
  * limitations under the License.
  */
 
-package org.springframework.boot.web.server.context;
+package org.springframework.boot.web.context;
+
+import java.util.Locale;
 
-import org.springframework.boot.WebApplicationType;
 import org.springframework.boot.diagnostics.AbstractFailureAnalyzer;
 import org.springframework.boot.diagnostics.FailureAnalysis;
 import org.springframework.boot.diagnostics.FailureAnalyzer;
-import org.springframework.context.ApplicationContextException;
+import org.springframework.core.annotation.Order;
 
 /**
  * A {@link FailureAnalyzer} that performs analysis of failures caused by an
  * {@link MissingWebServerFactoryBeanException}.
  *
  * @author Guirong Hu
+ * @author Andy Wilkinson
  */
-class MissingWebServerFactoryBeanFailureAnalyzer extends AbstractFailureAnalyzer<ApplicationContextException> {
+@Order(0)
-
+class MissingWebServerFactoryBeanFailureAnalyzer extends AbstractFailureAnalyzer<MissingWebServerFactoryBeanException> {
-	private static final String ACTION = "Check your application's dependencies on supported web servers "
-			+ "or configuration of web application type.";
 
 	@Override
-	protected FailureAnalysis analyze(Throwable rootFailure, ApplicationContextException cause) {
+	protected FailureAnalysis analyze(Throwable rootFailure, MissingWebServerFactoryBeanException cause) {
-		Throwable rootCause = cause.getCause();
+		return new FailureAnalysis(
-		if (rootCause instanceof MissingWebServerFactoryBeanException) {
+				"Web application could not be started as there was no " + cause.getBeanType().getName()
-			WebApplicationType webApplicationType = ((MissingWebServerFactoryBeanException) rootCause)
+						+ " bean defined in the context.",
-					.getWebApplicationType();
+				"Check your application's dependencies for a supported "
-			return new FailureAnalysis(String.format(
+						+ cause.getWebApplicationType().name().toLowerCase(Locale.ENGLISH) + " web server.\n"
-					"Reason: The running web application is of type %s, but the dependent class is missing.",
+						+ "Check the configured web application type.",
-					webApplicationType.name().toLowerCase()), ACTION, cause);
+				cause);
-		}
-		return null;
 	}
 
 }

spring-boot-project/spring-boot/src/main/java/org/springframework/boot/web/reactive/context/ReactiveWebServerApplicationContext.java

@@ -22,10 +22,10 @@ import org.springframework.boot.WebApplicationType;
 import org.springframework.boot.availability.AvailabilityChangeEvent;
 import org.springframework.boot.availability.ReadinessState;
 import org.springframework.boot.web.context.ConfigurableWebServerApplicationContext;
+import org.springframework.boot.web.context.MissingWebServerFactoryBeanException;
 import org.springframework.boot.web.context.WebServerGracefulShutdownLifecycle;
 import org.springframework.boot.web.reactive.server.ReactiveWebServerFactory;
 import org.springframework.boot.web.server.WebServer;
-import org.springframework.boot.web.server.context.MissingWebServerFactoryBeanException;
 import org.springframework.context.ApplicationContextException;
 import org.springframework.core.metrics.StartupStep;
 import org.springframework.http.server.reactive.HttpHandler;

spring-boot-project/spring-boot/src/main/java/org/springframework/boot/web/server/context/MissingWebServerFactoryBeanException.java

@@ -1,58 +0,0 @@
-/*
- * Copyright 2012-2022 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.boot.web.server.context;
-
-import org.springframework.boot.WebApplicationType;
-import org.springframework.context.ApplicationContextException;
-import org.springframework.lang.NonNull;
-
-/**
- * Throws exception when web server factory bean is missing.
- *
- * @author Guirong Hu
- * @since 2.7.0
- */
-@SuppressWarnings("serial")
-public class MissingWebServerFactoryBeanException extends ApplicationContextException {
-
-	private final WebApplicationType webApplicationType;
-
-	/**
-	 * Create a new {@code MissingWebServerFactoryBeanException} with the given web
-	 * application context class and the given web server factory class and the given type
-	 * of web application.
-	 * @param webApplicationContextClass the web application context class
-	 * @param webServerFactoryClass the web server factory class
-	 * @param webApplicationType the type of web application
-	 */
-	public MissingWebServerFactoryBeanException(@NonNull Class<?> webApplicationContextClass,
-			@NonNull Class<?> webServerFactoryClass, @NonNull WebApplicationType webApplicationType) {
-		super(String.format("Unable to start %s due to missing %s bean.", webApplicationContextClass.getSimpleName(),
-				webServerFactoryClass.getSimpleName()));
-		this.webApplicationType = webApplicationType;
-	}
-
-	/**
-	 * Returns the type of web application that is being run.
-	 * @return the type of web application
-	 * @since 2.7.0
-	 */
-	public WebApplicationType getWebApplicationType() {
-		return this.webApplicationType;
-	}
-
-}

spring-boot-project/spring-boot/src/main/java/org/springframework/boot/web/server/context/package-info.java

@@ -1,21 +0,0 @@
-/*
- * Copyright 2012-2022 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.
- */
-
-/**
- * Web server integrations with Spring's
- * {@link org.springframework.context.ApplicationContext ApplicationContext}.
- */
-package org.springframework.boot.web.server.context;

spring-boot-project/spring-boot/src/main/java/org/springframework/boot/web/servlet/context/ServletWebServerApplicationContext.java

@@ -41,9 +41,9 @@ import org.springframework.boot.WebApplicationType;
 import org.springframework.boot.availability.AvailabilityChangeEvent;
 import org.springframework.boot.availability.ReadinessState;
 import org.springframework.boot.web.context.ConfigurableWebServerApplicationContext;
+import org.springframework.boot.web.context.MissingWebServerFactoryBeanException;
 import org.springframework.boot.web.context.WebServerGracefulShutdownLifecycle;
 import org.springframework.boot.web.server.WebServer;
-import org.springframework.boot.web.server.context.MissingWebServerFactoryBeanException;
 import org.springframework.boot.web.servlet.FilterRegistrationBean;
 import org.springframework.boot.web.servlet.ServletContextInitializer;
 import org.springframework.boot.web.servlet.ServletContextInitializerBeans;

spring-boot-project/spring-boot/src/main/resources/META-INF/spring.factories

@@ -74,8 +74,8 @@ org.springframework.boot.diagnostics.analyzer.InvalidConfigurationPropertyNameFa
 org.springframework.boot.diagnostics.analyzer.InvalidConfigurationPropertyValueFailureAnalyzer,\
 org.springframework.boot.diagnostics.analyzer.PatternParseFailureAnalyzer,\
 org.springframework.boot.liquibase.LiquibaseChangelogMissingFailureAnalyzer,\
+org.springframework.boot.web.context.MissingWebServerFactoryBeanFailureAnalyzer,\
 org.springframework.boot.web.embedded.tomcat.ConnectorStartFailureAnalyzer,\
-org.springframework.boot.web.server.context.MissingWebServerFactoryBeanFailureAnalyzer
 
 # Failure Analysis Reporters
 org.springframework.boot.diagnostics.FailureAnalysisReporter=\

spring-boot-project/spring-boot/src/test/java/org/springframework/boot/web/context/MissingWebServerFactoryBeanFailureAnalyzerTests.java

@@ -14,13 +14,15 @@
  * limitations under the License.
  */
 
-package org.springframework.boot.web.server.context;
+package org.springframework.boot.web.context;
 
 import org.junit.jupiter.api.Test;
 
 import org.springframework.boot.diagnostics.FailureAnalysis;
 import org.springframework.boot.web.reactive.context.ReactiveWebServerApplicationContext;
+import org.springframework.boot.web.reactive.server.ReactiveWebServerFactory;
 import org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext;
+import org.springframework.boot.web.servlet.server.ServletWebServerFactory;
 import org.springframework.context.ApplicationContextException;
 import org.springframework.context.ConfigurableApplicationContext;
 
@@ -30,6 +32,7 @@ import static org.assertj.core.api.Assertions.assertThat;
  * Tests for {@link MissingWebServerFactoryBeanFailureAnalyzer}.
  *
  * @author Guirong Hu
+ * @author Andy Wilkinson
  */
 class MissingWebServerFactoryBeanFailureAnalyzerTests {
 
@@ -39,10 +42,11 @@ class MissingWebServerFactoryBeanFailureAnalyzerTests {
 		assertThat(failure).isNotNull();
 		FailureAnalysis analysis = new MissingWebServerFactoryBeanFailureAnalyzer().analyze(failure);
 		assertThat(analysis).isNotNull();
-		assertThat(analysis.getDescription()).isEqualTo(
+		assertThat(analysis.getDescription()).isEqualTo("Web application could not be started as there was no "
-				"Reason: The running web application is of type servlet, but the dependent class is missing.");
+				+ ServletWebServerFactory.class.getName() + " bean defined in the context.");
 		assertThat(analysis.getAction()).isEqualTo(
-				"Check your application's dependencies on supported web servers or configuration of web application type.");
+				"Check your application's dependencies for a supported servlet web server.\nCheck the configured web "
+						+ "application type.");
 	}
 
 	@Test
@@ -50,10 +54,11 @@ class MissingWebServerFactoryBeanFailureAnalyzerTests {
 		ApplicationContextException failure = createFailure(new ReactiveWebServerApplicationContext());
 		FailureAnalysis analysis = new MissingWebServerFactoryBeanFailureAnalyzer().analyze(failure);
 		assertThat(analysis).isNotNull();
-		assertThat(analysis.getDescription()).isEqualTo(
+		assertThat(analysis.getDescription()).isEqualTo("Web application could not be started as there was no "
-				"Reason: The running web application is of type reactive, but the dependent class is missing.");
+				+ ReactiveWebServerFactory.class.getName() + " bean defined in the context.");
 		assertThat(analysis.getAction()).isEqualTo(
-				"Check your application's dependencies on supported web servers or configuration of web application type.");
+				"Check your application's dependencies for a supported reactive web server.\nCheck the configured web "
+						+ "application type.");
 	}
 
 	private ApplicationContextException createFailure(ConfigurableApplicationContext context) {