Polish

spring-boot-project/spring-boot/src/main/java/org/springframework/boot/logging/java/JavaLoggingSystem.java

 /*
- * Copyright 2012-2020 the original author or authors.
+ * Copyright 2012-2021 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.
@@ -164,7 +164,7 @@ public class JavaLoggingSystem extends AbstractLoggingSystem {
 
 	@Override
 	public Runnable getShutdownHandler() {
-		return new ShutdownHandler();
+		return () -> LogManager.getLogManager().reset();
 	}
 
 	@Override
@@ -172,15 +172,6 @@ public class JavaLoggingSystem extends AbstractLoggingSystem {
 		this.configuredLoggers.clear();
 	}
 
-	private static final class ShutdownHandler implements Runnable {
-
-		@Override
-		public void run() {
-			LogManager.getLogManager().reset();
-		}
-
-	}
-
 	/**
 	 * {@link LoggingSystemFactory} that returns {@link JavaLoggingSystem} if possible.
 	 */

spring-boot-project/spring-boot/src/main/java/org/springframework/boot/logging/log4j2/Log4J2LoggingSystem.java

@@ -301,7 +301,7 @@ public class Log4J2LoggingSystem extends Slf4JLoggingSystem {
 
 	@Override
 	public Runnable getShutdownHandler() {
-		return new ShutdownHandler();
+		return () -> getLoggerContext().stop();
 	}
 
 	@Override
@@ -341,15 +341,6 @@ public class Log4J2LoggingSystem extends Slf4JLoggingSystem {
 		loggerContext.setExternalContext(null);
 	}
 
-	private final class ShutdownHandler implements Runnable {
-
-		@Override
-		public void run() {
-			getLoggerContext().stop();
-		}
-
-	}
-
 	/**
 	 * {@link LoggingSystemFactory} that returns {@link Log4J2LoggingSystem} if possible.
 	 */

spring-boot-project/spring-boot/src/main/java/org/springframework/boot/logging/logback/LogbackLoggingSystem.java

@@ -281,7 +281,7 @@ public class LogbackLoggingSystem extends Slf4JLoggingSystem {
 
 	@Override
 	public Runnable getShutdownHandler() {
-		return new ShutdownHandler();
+		return () -> getLoggerContext().stop();
 	}
 
 	private ch.qos.logback.classic.Logger getLogger(String name) {
@@ -328,15 +328,6 @@ public class LogbackLoggingSystem extends Slf4JLoggingSystem {
 		loggerContext.removeObject(LoggingSystem.class.getName());
 	}
 
-	private final class ShutdownHandler implements Runnable {
-
-		@Override
-		public void run() {
-			getLoggerContext().stop();
-		}
-
-	}
-
 	/**
 	 * {@link LoggingSystemFactory} that returns {@link LogbackLoggingSystem} if possible.
 	 */