Polish samples

spring-boot-samples/spring-boot-sample-actuator/src/main/java/sample/actuator/HelloWorldService.java

@@ -16,14 +16,16 @@
 
 package sample.actuator;
 
-import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.stereotype.Component;
 
 @Component
 public class HelloWorldService {
 
-	@Autowired
-	private ServiceProperties configuration;
+	private final ServiceProperties configuration;
+
+	public HelloWorldService(ServiceProperties configuration) {
+		this.configuration = configuration;
+	}
 
 	public String getHelloMessage() {
 		return "Hello " + this.configuration.getName();

spring-boot-samples/spring-boot-sample-actuator/src/main/java/sample/actuator/SampleActuatorApplication.java

@@ -20,17 +20,25 @@ import org.springframework.boot.SpringApplication;
 import org.springframework.boot.actuate.health.Health;
 import org.springframework.boot.actuate.health.HealthIndicator;
 import org.springframework.boot.autoconfigure.SpringBootApplication;
+import org.springframework.boot.context.properties.EnableConfigurationProperties;
+import org.springframework.context.annotation.Bean;
 
 @SpringBootApplication
-public class SampleActuatorApplication implements HealthIndicator {
-
-	@Override
-	public Health health() {
-		return Health.up().withDetail("hello", "world").build();
-	}
+@EnableConfigurationProperties(ServiceProperties.class)
+public class SampleActuatorApplication {
 
 	public static void main(String[] args) throws Exception {
 		SpringApplication.run(SampleActuatorApplication.class, args);
 	}
 
+	@Bean
+	public HealthIndicator helloHealthIndicator() {
+		return new HealthIndicator() {
+			@Override
+			public Health health() {
+				return Health.up().withDetail("hello", "world").build();
+			}
+		};
+	}
+
 }

spring-boot-samples/spring-boot-sample-actuator/src/main/java/sample/actuator/SampleController.java

@@ -23,7 +23,6 @@ import java.util.Map;
 
 import org.hibernate.validator.constraints.NotBlank;
 
-import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.context.annotation.Description;
 import org.springframework.stereotype.Controller;
 import org.springframework.validation.annotation.Validated;
@@ -36,8 +35,11 @@ import org.springframework.web.bind.annotation.ResponseBody;
 @Description("A controller for handling requests for hello messages")
 public class SampleController {
 
-	@Autowired
-	private HelloWorldService helloWorldService;
+	private final HelloWorldService helloWorldService;
+
+	public SampleController(HelloWorldService helloWorldService) {
+		this.helloWorldService = helloWorldService;
+	}
 
 	@GetMapping("/")
 	@ResponseBody

spring-boot-samples/spring-boot-sample-actuator/src/main/java/sample/actuator/ServiceProperties.java

@@ -17,12 +17,13 @@
 package sample.actuator;
 
 import org.springframework.boot.context.properties.ConfigurationProperties;
-import org.springframework.stereotype.Component;
 
 @ConfigurationProperties(prefix = "service", ignoreUnknownFields = false)
-@Component
 public class ServiceProperties {
 
+	/**
+	 * Name of the service.
+	 */
 	private String name = "World";
 
 	public String getName() {