Polish gh-31231

See gh-31540

spring-boot-project/spring-boot-actuator-autoconfigure/src/main/java/org/springframework/boot/actuate/autoconfigure/health/HealthEndpointProperties.java

@@ -42,9 +42,9 @@ public class HealthEndpointProperties extends HealthProperties {
 	/**
 	 * Health endpoint groups.
 	 */
-	private Map<String, Group> group = new LinkedHashMap<>();
+	private final Map<String, Group> group = new LinkedHashMap<>();
 
-	private Logging logging = new Logging();
+	private final Logging logging = new Logging();
 
 	@Override
 	public Show getShowDetails() {
@@ -139,7 +139,7 @@ public class HealthEndpointProperties extends HealthProperties {
 		/**
 		 * Threshold after which a warning will be logged for slow health indicators.
 		 */
-		Duration slowIndicatorThreshold = Duration.ofSeconds(10);
+		private Duration slowIndicatorThreshold = Duration.ofSeconds(10);
 
 		public Duration getSlowIndicatorThreshold() {
 			return this.slowIndicatorThreshold;

spring-boot-project/spring-boot-actuator/src/main/java/org/springframework/boot/actuate/health/HealthEndpoint.java

@@ -66,6 +66,7 @@ public class HealthEndpoint extends HealthEndpointSupport<HealthContributor, Hea
 	 * @param groups the health endpoint groups
 	 * @param slowIndicatorLoggingThreshold duration after which slow health indicator
 	 * logging should occur
+	 * @since 2.6.9
 	 */
 	public HealthEndpoint(HealthContributorRegistry registry, HealthEndpointGroups groups,
 			Duration slowIndicatorLoggingThreshold) {

spring-boot-project/spring-boot-actuator/src/main/java/org/springframework/boot/actuate/health/HealthEndpointSupport.java

@@ -52,7 +52,7 @@ abstract class HealthEndpointSupport<C, T> {
 
 	private final HealthEndpointGroups groups;
 
-	private Duration slowIndicatorLoggingThreshold;
+	private final Duration slowIndicatorLoggingThreshold;
 
 	/**
 	 * Create a new {@link HealthEndpointSupport} instance.
@@ -177,7 +177,7 @@ abstract class HealthEndpointSupport<C, T> {
 				if (duration.compareTo(this.slowIndicatorLoggingThreshold) > 0) {
 					String contributorClassName = contributor.getClass().getName();
 					Object contributorIdentifier = (!StringUtils.hasLength(name)) ? contributorClassName
-							: contributor.getClass().getName() + " (" + name + ")";
+							: contributorClassName + " (" + name + ")";
 					logger.warn(LogMessage.format("Health contributor %s took %s to respond", contributorIdentifier,
 							DurationStyle.SIMPLE.print(duration)));
 				}

spring-boot-project/spring-boot-actuator/src/main/java/org/springframework/boot/actuate/health/HealthEndpointWebExtension.java

@@ -66,6 +66,7 @@ public class HealthEndpointWebExtension extends HealthEndpointSupport<HealthCont
 	 * @param groups the health endpoint groups
 	 * @param slowIndicatorLoggingThreshold duration after which slow health indicator
 	 * logging should occur
+	 * @since 2.6.9
 	 */
 	public HealthEndpointWebExtension(HealthContributorRegistry registry, HealthEndpointGroups groups,
 			Duration slowIndicatorLoggingThreshold) {

spring-boot-project/spring-boot-actuator/src/main/java/org/springframework/boot/actuate/health/ReactiveHealthEndpointWebExtension.java

@@ -66,6 +66,7 @@ public class ReactiveHealthEndpointWebExtension
 	 * @param groups the health endpoint groups
 	 * @param slowIndicatorLoggingThreshold duration after which slow health indicator
 	 * logging should occur
+	 * @since 2.6.9
 	 */
 	public ReactiveHealthEndpointWebExtension(ReactiveHealthContributorRegistry registry, HealthEndpointGroups groups,
 			Duration slowIndicatorLoggingThreshold) {

spring-boot-project/spring-boot-docs/src/docs/asciidoc/actuator/endpoints.adoc

@@ -769,7 +769,7 @@ In the preceding example, the health information is available in an entry named
 
 TIP: Health indicators are usually called over HTTP and need to respond before any connection timeouts.
 Spring Boot will log a warning message for any health indicator that takes longer than 10 seconds to respond.
-If you want to configure this threshold, you can use the configprop:management.endpoint.health.logging.slow-indicator-threshold[] property
+If you want to configure this threshold, you can use the configprop:management.endpoint.health.logging.slow-indicator-threshold[] property.
 
 In addition to Spring Boot's predefined {spring-boot-actuator-module-code}/health/Status.java[`Status`] types, `Health` can return a custom `Status` that represents a new system state.
 In such cases, you also need to provide a custom implementation of the {spring-boot-actuator-module-code}/health/StatusAggregator.java[`StatusAggregator`] interface, or you must configure the default implementation by using the configprop:management.endpoint.health.status.order[] configuration property.