Polish "Expose Tomcat AccessLog Max days property"

Closes gh-15954

spring-boot-project/spring-boot-autoconfigure/src/main/java/org/springframework/boot/autoconfigure/web/ServerProperties.java

 /*
- * Copyright 2012-2018 the original author or authors.
+ * Copyright 2012-2019 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.
@@ -593,6 +593,11 @@ public class ServerProperties {
 			 */
 			private boolean renameOnRotate = false;
 
+			/**
+			 * Number of days to retain the access log files before they are removed.
+			 */
+			private int maxDays = -1;
+
 			/**
 			 * Date format to place in the log file name.
 			 */
@@ -609,19 +614,6 @@ public class ServerProperties {
 			 */
 			private boolean buffered = true;
 
-			/**
-			 * The number of days to retain the access log files before they are removed.
-			 */
-			private int maxDays = -1;
-
-			public int getMaxDays() {
-				return this.maxDays;
-			}
-
-			public void setMaxDays(int maxDays) {
-				this.maxDays = maxDays;
-			}
-
 			public boolean isEnabled() {
 				return this.enabled;
 			}
@@ -678,6 +670,14 @@ public class ServerProperties {
 				this.renameOnRotate = renameOnRotate;
 			}
 
+			public int getMaxDays() {
+				return this.maxDays;
+			}
+
+			public void setMaxDays(int maxDays) {
+				this.maxDays = maxDays;
+			}
+
 			public String getFileDateFormat() {
 				return this.fileDateFormat;
 			}

spring-boot-project/spring-boot-autoconfigure/src/main/java/org/springframework/boot/autoconfigure/web/embedded/TomcatWebServerFactoryCustomizer.java

 /*
- * Copyright 2012-2018 the original author or authors.
+ * Copyright 2012-2019 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.
@@ -258,12 +258,12 @@ public class TomcatWebServerFactoryCustomizer implements
 		valve.setPrefix(tomcatProperties.getAccesslog().getPrefix());
 		valve.setSuffix(tomcatProperties.getAccesslog().getSuffix());
 		valve.setRenameOnRotate(tomcatProperties.getAccesslog().isRenameOnRotate());
+		valve.setMaxDays(tomcatProperties.getAccesslog().getMaxDays());
 		valve.setFileDateFormat(tomcatProperties.getAccesslog().getFileDateFormat());
 		valve.setRequestAttributesEnabled(
 				tomcatProperties.getAccesslog().isRequestAttributesEnabled());
 		valve.setRotatable(tomcatProperties.getAccesslog().isRotate());
 		valve.setBuffered(tomcatProperties.getAccesslog().isBuffered());
-		valve.setMaxDays(tomcatProperties.getAccesslog().getMaxDays());
 		factory.addEngineValves(valve);
 	}
 

spring-boot-project/spring-boot-autoconfigure/src/test/java/org/springframework/boot/autoconfigure/web/embedded/TomcatWebServerFactoryCustomizerTests.java

 /*
- * Copyright 2012-2018 the original author or authors.
+ * Copyright 2012-2019 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.
@@ -326,20 +326,21 @@ public class TomcatWebServerFactoryCustomizerTests {
 	}
 
 	@Test
-	public void accessLogSetMaxDays() {
-		bind("server.tomcat.accesslog.enabled=true",
-				"server.tomcat.accesslog.max-days=20");
+	public void accessLogMaxDaysDefault() {
+		bind("server.tomcat.accesslog.enabled=true");
 		TomcatServletWebServerFactory factory = customizeAndGetFactory();
 		assertThat(((AccessLogValve) factory.getEngineValves().iterator().next())
-				.getMaxDays()).isEqualTo(20);
+				.getMaxDays()).isEqualTo(
+						this.serverProperties.getTomcat().getAccesslog().getMaxDays());
 	}
 
 	@Test
-	public void accessLogDefaultMaxDays() {
-		bind("server.tomcat.accesslog.enabled=true");
+	public void accessLoMaxDaysCanBeRedefined() {
+		bind("server.tomcat.accesslog.enabled=true",
+				"server.tomcat.accesslog.max-days=20");
 		TomcatServletWebServerFactory factory = customizeAndGetFactory();
 		assertThat(((AccessLogValve) factory.getEngineValves().iterator().next())
-				.getMaxDays()).isEqualTo(-1);
+				.getMaxDays()).isEqualTo(20);
 	}
 
 	private void bind(String... inlinedProperties) {

spring-boot-project/spring-boot-docs/src/main/asciidoc/appendix/application-properties.adoc

@@ -255,7 +255,7 @@ content into your application. Rather, pick only the properties that you need.
 	server.tomcat.accesslog.directory=logs # Directory in which log files are created. Can be absolute or relative to the Tomcat base dir.
 	server.tomcat.accesslog.enabled=false # Enable access log.
 	server.tomcat.accesslog.file-date-format=.yyyy-MM-dd # Date format to place in the log file name.
-	server.tomcat.accesslog.max-days=-1#The number of days to retain the access log files before they are removed.
+	server.tomcat.accesslog.max-days=-1# Number of days to retain the access log files before they are removed.
 	server.tomcat.accesslog.pattern=common # Format pattern for access logs.
 	server.tomcat.accesslog.prefix=access_log # Log file name prefix.
 	server.tomcat.accesslog.rename-on-rotate=false # Whether to defer inclusion of the date stamp in the file name until rotate time.