Expose actual result value for @CacheEvict condition

Closes gh-32960

Author: jhoeller

spring-context/src/main/java/org/springframework/cache/interceptor/CacheAspectSupport.java

@@ -630,7 +630,7 @@ private Object processCacheEvicts(Collection<CacheOperationContext> contexts, bo
 		if (result instanceof CompletableFuture<?> future) {
 			return future.whenComplete((value, ex) -> {
 				if (ex == null) {
-					performCacheEvicts(applicable, result);
+					performCacheEvicts(applicable, value);
 				}
 			});
 		}
@@ -1112,7 +1112,7 @@ public Object processCacheEvicts(List<CacheOperationContext> contexts, @Nullable
 			ReactiveAdapter adapter = (result != null ? this.registry.getAdapter(result.getClass()) : null);
 			if (adapter != null) {
 				return adapter.fromPublisher(Mono.from(adapter.toPublisher(result))
-						.doOnSuccess(value -> performCacheEvicts(contexts, result)));
+						.doOnSuccess(value -> performCacheEvicts(contexts, value)));
 			}
 			return NOT_HANDLED;
 		}

spring-context/src/test/java/org/springframework/cache/CacheReproTests.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2023 the original author or authors.
+ * Copyright 2002-2024 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.
@@ -606,9 +606,9 @@ public CompletableFuture<TestBean> insertItem(TestBean item) {
 			return CompletableFuture.completedFuture(item);
 		}
 
-		@CacheEvict(cacheNames = "itemCache", allEntries = true)
-		public CompletableFuture<Void> clear() {
-			return CompletableFuture.completedFuture(null);
+		@CacheEvict(cacheNames = "itemCache", allEntries = true, condition = "#result > 0")
+		public CompletableFuture<Integer> clear() {
+			return CompletableFuture.completedFuture(1);
 		}
 	}
 
@@ -655,9 +655,9 @@ public Mono<TestBean> insertItem(TestBean item) {
 			return Mono.just(item);
 		}
 
-		@CacheEvict(cacheNames = "itemCache", allEntries = true)
-		public Mono<Void> clear() {
-			return Mono.empty();
+		@CacheEvict(cacheNames = "itemCache", allEntries = true, condition = "#result > 0")
+		public Mono<Integer> clear() {
+			return Mono.just(1);
 		}
 	}
 
@@ -706,9 +706,9 @@ public Flux<TestBean> insertItem(String id, List<TestBean> item) {
 			return Flux.fromIterable(item);
 		}
 
-		@CacheEvict(cacheNames = "itemCache", allEntries = true)
-		public Flux<Void> clear() {
-			return Flux.empty();
+		@CacheEvict(cacheNames = "itemCache", allEntries = true, condition = "#result > 0")
+		public Flux<Integer> clear() {
+			return Flux.just(1);
 		}
 	}