From 1c9d4deba2fc4506f8160b9ef6a8813b081cf460 Mon Sep 17 00:00:00 2001
From: Rossen Stoyanchev <rstoyanchev@pivotal.io>
Date: Fri, 10 Mar 2017 10:57:31 -0500
Subject: [PATCH] Add methods to prepend WebFilter + WebExceptionHandler

---
 .../server/adapter/WebHttpHandlerBuilder.java | 24 +++++++++++++++++--
 1 file changed, 22 insertions(+), 2 deletions(-)

diff --git a/spring-web/src/main/java/org/springframework/web/server/adapter/WebHttpHandlerBuilder.java b/spring-web/src/main/java/org/springframework/web/server/adapter/WebHttpHandlerBuilder.java
index 2afb3a25ee..ac070f6f71 100644
--- a/spring-web/src/main/java/org/springframework/web/server/adapter/WebHttpHandlerBuilder.java
+++ b/spring-web/src/main/java/org/springframework/web/server/adapter/WebHttpHandlerBuilder.java
@@ -131,7 +131,7 @@ public class WebHttpHandlerBuilder {
 
 
 	/**
-	 * Add the given filters to use for processing requests.
+	 * Add the given filters.
 	 * @param filters the filters to add
 	 */
 	public WebHttpHandlerBuilder filters(List<? extends WebFilter> filters) {
@@ -142,7 +142,17 @@ public class WebHttpHandlerBuilder {
 	}
 
 	/**
-	 * Add the given exception handler to apply at the end of request processing.
+	 * Insert the given filter before other configured filters.
+	 * @param filter the filters to insert
+	 */
+	public WebHttpHandlerBuilder prependFilter(WebFilter filter) {
+		Assert.notNull(filter, "WebFilter is required");
+		this.filters.add(0, filter);
+		return this;
+	}
+
+	/**
+	 * Add the given exception handlers.
 	 * @param handlers the exception handlers
 	 */
 	public WebHttpHandlerBuilder exceptionHandlers(List<WebExceptionHandler> handlers) {
@@ -152,6 +162,16 @@ public class WebHttpHandlerBuilder {
 		return this;
 	}
 
+	/**
+	 * Insert the given exception handler before other configured handlers.
+	 * @param handler the exception handler to insert
+	 */
+	public WebHttpHandlerBuilder prependExceptionHandler(WebExceptionHandler handler) {
+		Assert.notNull(handler, "WebExceptionHandler is required");
+		this.exceptionHandlers.add(0, handler);
+		return this;
+	}
+
 	/**
 	 * Configure the {@link WebSessionManager} to set on the
 	 * {@link ServerWebExchange WebServerExchange}.