Merge pull request #49710 from deejay1

* kotlin-examples-redux:
  Polish "Add some more Kotlin examples and trivial style fixes"
  Add some more Kotlin examples and trivial style fixes

Closes gh-49710

spring-boot-project/spring-boot-docs/src/docs/antora/modules/reference/pages/features/kotlin.adoc

@@ -121,7 +121,8 @@ javadoc:org.springframework.boot.context.properties.ConfigurationProperties[form
 data class KotlinExampleProperties(
 		val name: String,
 		val description: String,
-		val myService: MyService) {
+		val myService: MyService
+) {
 
 	data class MyService(
 			val apiToken: String,

spring-boot-project/spring-boot-docs/src/main/java/org/springframework/boot/docs/web/servlet/springmvc/errorhandling/errorpages/MyErrorViewResolver.java

@@ -31,7 +31,7 @@ public class MyErrorViewResolver implements ErrorViewResolver {
 		// Use the request or status to optionally return a ModelAndView
 		if (status == HttpStatus.INSUFFICIENT_STORAGE) {
 			// We could add custom model values here
-			new ModelAndView("myview");
+			return new ModelAndView("myview");
 		}
 		return null;
 	}

spring-boot-project/spring-boot-docs/src/main/kotlin/org/springframework/boot/docs/features/developingautoconfiguration/testing/MyConditionEvaluationReportingTests.kt

@@ -29,8 +29,9 @@ class MyConditionEvaluationReportingTests {
 	fun autoConfigTest() {
 		ApplicationContextRunner()
 			.withInitializer(ConditionEvaluationReportLoggingListener.forLogLevel(LogLevel.INFO))
-			.run { context: AssertableApplicationContext? -> }
+			.run { context: AssertableApplicationContext? ->
+				// Test something...
+			}
 	}
 
 }
-

spring-boot-project/spring-boot-docs/src/main/kotlin/org/springframework/boot/docs/using/devtools/restart/disable/MyApplication.kt

@@ -16,17 +16,13 @@
 
 package org.springframework.boot.docs.using.devtools.restart.disable
 
-import org.springframework.boot.SpringApplication
 import org.springframework.boot.autoconfigure.SpringBootApplication
+import org.springframework.boot.runApplication
 
 @SpringBootApplication
-object MyApplication {
-
-	@JvmStatic
-	fun main(args: Array<String>) {
-		System.setProperty("spring.devtools.restart.enabled", "false")
-		SpringApplication.run(MyApplication::class.java, *args)
-	}
+class MyApplication
 
+fun main(args: Array<String>) {
+	System.setProperty("spring.devtools.restart.enabled", "false")
+	runApplication<MyApplication>(*args)
 }
-

spring-boot-project/spring-boot-docs/src/main/kotlin/org/springframework/boot/docs/using/usingthespringbootapplicationannotation/springapplication/MyApplication.kt

@@ -19,11 +19,10 @@ package org.springframework.boot.docs.using.usingthespringbootapplicationannotat
 import org.springframework.boot.autoconfigure.SpringBootApplication
 import org.springframework.boot.runApplication
 
-// same as @SpringBootConfiguration @EnableAutoConfiguration @ComponentScan
+// Same as @SpringBootConfiguration @EnableAutoConfiguration @ComponentScan
 @SpringBootApplication
 class MyApplication
 
 fun main(args: Array<String>) {
 	runApplication<MyApplication>(*args)
 }
-

spring-boot-project/spring-boot-docs/src/main/kotlin/org/springframework/boot/docs/web/servlet/embeddedcontainer/applicationcontext/MyDemoBean.kt

@@ -0,0 +1,35 @@
+/*
+ * Copyright 2012-present 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.docs.web.servlet.embeddedcontainer.applicationcontext
+
+import jakarta.servlet.ServletContext
+import org.springframework.boot.context.event.ApplicationStartedEvent
+import org.springframework.context.ApplicationContext
+import org.springframework.context.ApplicationListener
+import org.springframework.web.context.WebApplicationContext
+
+class MyDemoBean : ApplicationListener<ApplicationStartedEvent> {
+
+	@Suppress("unused")
+	private var servletContext: ServletContext? = null
+
+	override fun onApplicationEvent(event: ApplicationStartedEvent) {
+		val applicationContext: ApplicationContext = event.applicationContext
+		this.servletContext = (applicationContext as WebApplicationContext).servletContext
+	}
+
+}

spring-boot-project/spring-boot-docs/src/main/kotlin/org/springframework/boot/docs/web/servlet/jersey/MyEndpoint.kt

@@ -0,0 +1,32 @@
+/*
+ * Copyright 2012-present 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.docs.web.servlet.jersey
+
+import jakarta.ws.rs.GET
+import jakarta.ws.rs.Path
+import org.springframework.stereotype.Component
+
+@Component
+@Path("/hello")
+class MyEndpoint {
+
+	@GET
+	fun message(): String {
+		return "Hello"
+	}
+
+}

spring-boot-project/spring-boot-docs/src/main/kotlin/org/springframework/boot/docs/web/servlet/jersey/MyJerseyConfig.kt

@@ -0,0 +1,29 @@
+/*
+ * Copyright 2012-present 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.docs.web.servlet.jersey
+
+import org.glassfish.jersey.server.ResourceConfig
+import org.springframework.stereotype.Component
+
+@Component
+class MyJerseyConfig : ResourceConfig() {
+
+	init {
+		register(MyEndpoint::class.java)
+	}
+
+}