From 0d612b3b1d9d48c498f782a69616ffdb7931cd9e Mon Sep 17 00:00:00 2001
From: Sam Brannen <104798+sbrannen@users.noreply.github.com>
Date: Wed, 28 Jan 2026 14:54:52 +0100
Subject: [PATCH] =?UTF-8?q?Make=20TaskCallback=20a=20@=E2=81=A0FunctionalI?=
 =?UTF-8?q?nterface?=
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---
 .../main/java/org/springframework/core/task/TaskCallback.java    | 1 +
 1 file changed, 1 insertion(+)

diff --git a/spring-core/src/main/java/org/springframework/core/task/TaskCallback.java b/spring-core/src/main/java/org/springframework/core/task/TaskCallback.java
index d1f1f64d264..a5b7a05fb4f 100644
--- a/spring-core/src/main/java/org/springframework/core/task/TaskCallback.java
+++ b/spring-core/src/main/java/org/springframework/core/task/TaskCallback.java
@@ -36,6 +36,7 @@ import org.jspecify.annotations.Nullable;
  * @param <E> the exception propagated, if any
  * @see SyncTaskExecutor#execute(TaskCallback)
  */
+@FunctionalInterface
 public interface TaskCallback<V extends @Nullable Object, E extends Exception> extends Callable<V> {
 
 	@Override