Make JCacheCacheMeterBinderProvider back off when user provides a bean (fixes #46212)

Signed-off-by: Siva Sai Udayagiri <[email protected]>

Author: SSUday

spring-boot-project/spring-boot-actuator-autoconfigure/src/main/java/org/springframework/boot/actuate/autoconfigure/metrics/cache/CacheMeterBinderProvidersConfiguration.java

@@ -30,6 +30,7 @@
 import org.springframework.boot.actuate.metrics.cache.JCacheCacheMeterBinderProvider;
 import org.springframework.boot.actuate.metrics.cache.RedisCacheMeterBinderProvider;
 import org.springframework.boot.autoconfigure.condition.ConditionalOnClass;
+import org.springframework.boot.autoconfigure.condition.ConditionalOnMissingBean;
 import org.springframework.cache.caffeine.CaffeineCache;
 import org.springframework.cache.jcache.JCacheCache;
 import org.springframework.context.annotation.Bean;
@@ -83,6 +84,7 @@ HazelcastCacheMeterBinderProvider hazelcastCacheMeterBinderProvider() {
 	static class JCacheCacheMeterBinderProviderConfiguration {
 
 		@Bean
+		@ConditionalOnMissingBean(JCacheCacheMeterBinderProvider.class)
 		JCacheCacheMeterBinderProvider jCacheCacheMeterBinderProvider() {
 			return new JCacheCacheMeterBinderProvider();
 		}

spring-boot-project/spring-boot-actuator-autoconfigure/src/test/java/org/springframework/boot/actuate/autoconfigure/metrics/cache/JCacheCacheMeterBinderProviderBackOffTests.java

@@ -0,0 +1,41 @@
+/*
+ * Copyright 2012-2025 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.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.springframework.boot.actuate.autoconfigure.metrics.cache;
+
+import org.junit.jupiter.api.Test;
+
+import org.springframework.boot.actuate.metrics.cache.JCacheCacheMeterBinderProvider;
+import org.springframework.boot.autoconfigure.AutoConfigurations;
+import org.springframework.boot.test.context.runner.ApplicationContextRunner;
+
+import static org.assertj.core.api.Assertions.assertThat;
+
+class JCacheCacheMeterBinderProviderBackOffTests {
+
+	private final ApplicationContextRunner contextRunner = new ApplicationContextRunner()
+		.withConfiguration(AutoConfigurations.of(CacheMetricsAutoConfiguration.class));
+
+	@Test
+	void backsOffWhenUserProvidesProvider() {
+		JCacheCacheMeterBinderProvider custom = new JCacheCacheMeterBinderProvider();
+		this.contextRunner.withBean(JCacheCacheMeterBinderProvider.class, () -> custom).run((context) -> {
+			var bean = context.getBean(JCacheCacheMeterBinderProvider.class);
+			assertThat(bean).isSameAs(custom);
+		});
+	}
+
+}