Consistent final logger fields

spring-aop/src/main/java/org/springframework/aop/target/dynamic/AbstractRefreshableTargetSource.java

 /*
- * Copyright 2002-2012 the original author or authors.
+ * Copyright 2002-2016 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.
@@ -39,7 +39,7 @@ import org.springframework.aop.TargetSource;
 public abstract class AbstractRefreshableTargetSource implements TargetSource, Refreshable {
 
 	/** Logger available to subclasses */
-	protected Log logger = LogFactory.getLog(getClass());
+	protected final Log logger = LogFactory.getLog(getClass());
 
 	protected Object targetObject;
 

spring-web-reactive/src/main/java/org/springframework/web/reactive/result/method/annotation/RequestMappingHandlerAdapter.java

@@ -49,7 +49,6 @@ import org.springframework.web.reactive.result.method.HandlerMethodArgumentResol
 import org.springframework.web.reactive.result.method.InvocableHandlerMethod;
 import org.springframework.web.server.ServerWebExchange;
 
-
 /**
  * Supports the invocation of {@code @RequestMapping} methods.
  *
@@ -58,7 +57,7 @@ import org.springframework.web.server.ServerWebExchange;
  */
 public class RequestMappingHandlerAdapter implements HandlerAdapter, BeanFactoryAware, InitializingBean {
 
-	private static Log logger = LogFactory.getLog(RequestMappingHandlerAdapter.class);
+	private static final Log logger = LogFactory.getLog(RequestMappingHandlerAdapter.class);
 
 
 	private List<HandlerMethodArgumentResolver> customArgumentResolvers;

spring-web/src/main/java/org/springframework/http/server/reactive/ReactorHttpHandlerAdapter.java

@@ -35,7 +35,7 @@ import org.springframework.util.Assert;
  */
 public class ReactorHttpHandlerAdapter implements Function<HttpChannel, Mono<Void>> {
 
-	private static Log logger = LogFactory.getLog(ReactorHttpHandlerAdapter.class);
+	private static final Log logger = LogFactory.getLog(ReactorHttpHandlerAdapter.class);
 
 	private final HttpHandler delegate;
 

spring-web/src/main/java/org/springframework/http/server/reactive/RxNettyHttpHandlerAdapter.java

@@ -39,7 +39,7 @@ import org.springframework.util.Assert;
  */
 public class RxNettyHttpHandlerAdapter implements RequestHandler<ByteBuf, ByteBuf> {
 
-	private static Log logger = LogFactory.getLog(RxNettyHttpHandlerAdapter.class);
+	private static final Log logger = LogFactory.getLog(RxNettyHttpHandlerAdapter.class);
 
 	private final HttpHandler delegate;
 

spring-web/src/main/java/org/springframework/http/server/reactive/ServletHttpHandlerAdapter.java

@@ -48,7 +48,7 @@ public class ServletHttpHandlerAdapter extends HttpServlet {
 	private static final int DEFAULT_BUFFER_SIZE = 8192;
 
 
-	private static Log logger = LogFactory.getLog(ServletHttpHandlerAdapter.class);
+	private static final Log logger = LogFactory.getLog(ServletHttpHandlerAdapter.class);
 
 	private final HttpHandler handler;
 

spring-web/src/main/java/org/springframework/http/server/reactive/UndertowHttpHandlerAdapter.java

@@ -36,7 +36,7 @@ import org.springframework.util.Assert;
  */
 public class UndertowHttpHandlerAdapter implements io.undertow.server.HttpHandler {
 
-	private static Log logger = LogFactory.getLog(UndertowHttpHandlerAdapter.class);
+	private static final Log logger = LogFactory.getLog(UndertowHttpHandlerAdapter.class);
 
 
 	private final HttpHandler delegate;

spring-web/src/main/java/org/springframework/web/server/adapter/HttpWebHandlerAdapter.java

@@ -42,7 +42,7 @@ import org.springframework.web.server.session.WebSessionManager;
  */
 public class HttpWebHandlerAdapter extends WebHandlerDecorator implements HttpHandler {
 
-	private static Log logger = LogFactory.getLog(HttpWebHandlerAdapter.class);
+	private static final Log logger = LogFactory.getLog(HttpWebHandlerAdapter.class);
 
 	private WebSessionManager sessionManager = new DefaultWebSessionManager();
 

spring-web/src/main/java/org/springframework/web/server/handler/ExceptionHandlingWebHandler.java

@@ -41,8 +41,6 @@ import org.springframework.web.server.WebHandler;
  */
 public class ExceptionHandlingWebHandler extends WebHandlerDecorator {
 
-	private static Log logger = LogFactory.getLog(ExceptionHandlingWebHandler.class);
-
 	/**
 	 * Log category to use on network IO exceptions after a client has gone away.
 	 * <p>Servlet containers do not expose notifications when a client disconnects;
@@ -56,30 +54,29 @@ public class ExceptionHandlingWebHandler extends WebHandlerDecorator {
 	private static final String DISCONNECTED_CLIENT_LOG_CATEGORY =
 			ExceptionHandlingWebHandler.class.getName() + ".DisconnectedClient";
 
-	private static final Log disconnectedClientLogger = LogFactory.getLog(DISCONNECTED_CLIENT_LOG_CATEGORY);
-
 	private static final Set<String> DISCONNECTED_CLIENT_EXCEPTIONS;
 
 	static {
 		Set<String> set = new HashSet<>(3);
-		set.add("ClientAbortException"); // Tomcat
-		set.add("EOFException"); // Tomcat
-		set.add("EofException"); // Jetty
+		set.add("ClientAbortException");  // Tomcat
+		set.add("EOFException");  // Tomcat
+		set.add("EofException");  // Jetty
 		// java.io.IOException("Broken pipe") on WildFly (already covered)
 		DISCONNECTED_CLIENT_EXCEPTIONS = Collections.unmodifiableSet(set);
 	}
 
+
+	private static final Log logger = LogFactory.getLog(ExceptionHandlingWebHandler.class);
+
+	private static final Log disconnectedClientLogger = LogFactory.getLog(DISCONNECTED_CLIENT_LOG_CATEGORY);
+
 	private final List<WebExceptionHandler> exceptionHandlers;
 
 
 	public ExceptionHandlingWebHandler(WebHandler delegate, WebExceptionHandler... exceptionHandlers) {
 		super(delegate);
-		this.exceptionHandlers = initList(exceptionHandlers);
-	}
-
-	private static List<WebExceptionHandler> initList(WebExceptionHandler[] list) {
-		return (list != null ? Collections.unmodifiableList(Arrays.asList(list)):
-				Collections.emptyList());
+		this.exceptionHandlers = (exceptionHandlers != null ?
+				Collections.unmodifiableList(Arrays.asList(exceptionHandlers)): Collections.emptyList());
 	}
 
 
@@ -115,6 +112,7 @@ public class ExceptionHandlingWebHandler extends WebHandlerDecorator {
 	private void logException(Throwable ex) {
 		@SuppressWarnings("serial")
 		NestedCheckedException nestedException = new NestedCheckedException("", ex) {};
+
 		if ("Broken pipe".equalsIgnoreCase(nestedException.getMostSpecificCause().getMessage()) ||
 				DISCONNECTED_CLIENT_EXCEPTIONS.contains(ex.getClass().getSimpleName())) {
 

spring-websocket/src/main/java/org/springframework/web/socket/server/support/OriginHandshakeInterceptor.java

@@ -42,7 +42,7 @@ import org.springframework.web.util.WebUtils;
  */
 public class OriginHandshakeInterceptor implements HandshakeInterceptor {
 
-	protected Log logger = LogFactory.getLog(getClass());
+	protected final Log logger = LogFactory.getLog(getClass());
 
 	private final Set<String> allowedOrigins = new LinkedHashSet<>();
 

spring-websocket/src/main/java/org/springframework/web/socket/sockjs/client/AbstractXhrTransport.java

@@ -55,7 +55,7 @@ public abstract class AbstractXhrTransport implements XhrTransport {
 	}
 
 
-	protected Log logger = LogFactory.getLog(getClass());
+	protected final Log logger = LogFactory.getLog(getClass());
 
 	private boolean xhrStreamingDisabled;
 
@@ -71,11 +71,9 @@ public abstract class AbstractXhrTransport implements XhrTransport {
 	 * An {@code XhrTransport} can support both the "xhr_streaming" and "xhr"
 	 * SockJS server transports. From a client perspective there is no
 	 * implementation difference.
-	 *
 	 * <p>Typically an {@code XhrTransport} is used as "XHR streaming" first and
 	 * then, if that fails, as "XHR". In some cases however it may be helpful to
 	 * suppress XHR streaming so that only XHR is attempted.
-	 *
 	 * <p>By default this property is set to {@code false} which means both
 	 * "XHR streaming" and "XHR" apply.
 	 */