Polish "Retrieve javax.cache.CacheManager using Bean ClassLoader"

Closes gh-13338

spring-boot-autoconfigure/src/main/java/org/springframework/boot/autoconfigure/cache/JCacheCacheConfiguration.java

 /*
- * Copyright 2012-2017 the original author or authors.
+ * Copyright 2012-2018 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.
@@ -88,6 +88,11 @@ class JCacheCacheConfiguration implements BeanClassLoaderAware {
 		this.cachePropertiesCustomizers = cachePropertiesCustomizers.getIfAvailable();
 	}
 
+	@Override
+	public void setBeanClassLoader(ClassLoader classLoader) {
+		this.beanClassLoader = classLoader;
+	}
+
 	@Bean
 	public JCacheCacheManager cacheManager(CacheManager jCacheCacheManager) {
 		JCacheCacheManager cacheManager = new JCacheCacheManager(jCacheCacheManager);
@@ -154,11 +159,6 @@ class JCacheCacheConfiguration implements BeanClassLoaderAware {
 		}
 	}
 
-	@Override
-	public void setBeanClassLoader(ClassLoader classLoader) {
-		this.beanClassLoader = classLoader;
-	}
-
 	/**
 	 * Determine if JCache is available. This either kicks in if a provider is available
 	 * as defined per {@link JCacheProviderAvailableCondition} or if a

spring-boot-autoconfigure/src/test/java/org/springframework/boot/autoconfigure/cache/CacheAutoConfigurationTests.java

@@ -374,6 +374,16 @@ public class CacheAutoConfigurationTests {
 				"spring.cache.jcache.config=" + configLocation);
 	}
 
+	@Test
+	public void jCacheCacheUseBeanClassLoader() {
+		String cachingProviderFqn = MockCachingProvider.class.getName();
+		load(DefaultCacheConfiguration.class, "spring.cache.type=jcache",
+				"spring.cache.jcache.provider=" + cachingProviderFqn);
+		JCacheCacheManager cacheManager = validateCacheManager(JCacheCacheManager.class);
+		assertThat(cacheManager.getCacheManager().getClassLoader())
+				.isEqualTo(this.context.getClassLoader());
+	}
+
 	@Test
 	public void ehcacheCacheWithCaches() {
 		load(DefaultCacheConfiguration.class, "spring.cache.type=ehcache");