EhCacheFactoryBean does not call set(Sampled)StatisticsEnabled on EhCache 2.7/2.8

Issue: SPR-11265
(cherry picked from commit 73d8f06)

Author: jhoeller

spring-context-support/src/main/java/org/springframework/cache/ehcache/EhCacheFactoryBean.java

@@ -38,6 +38,7 @@
 import org.springframework.beans.factory.FactoryBean;
 import org.springframework.beans.factory.InitializingBean;
 import org.springframework.util.Assert;
+import org.springframework.util.ClassUtils;
 
 /**
  * {@link FactoryBean} that creates a named EhCache {@link net.sf.ehcache.Cache} instance
@@ -64,6 +65,11 @@
  */
 public class EhCacheFactoryBean implements FactoryBean<Ehcache>, BeanNameAware, InitializingBean {
 
+	// EhCache's setStatisticsEnabled(boolean) available? Not anymore as of EhCache 2.7...
+	private static final boolean setStatisticsAvailable =
+			ClassUtils.hasMethod(Ehcache.class, "setStatisticsEnabled", boolean.class);
+
+
 	protected final Log logger = LogFactory.getLog(getClass());
 
 	private CacheManager cacheManager;
@@ -275,15 +281,19 @@ public void setCacheEventListeners(Set<CacheEventListener> cacheEventListeners)
 
 	/**
 	 * Set whether to enable EhCache statistics on this cache.
-	 * @see net.sf.ehcache.Cache#setStatisticsEnabled
+	 * <p>Note: As of EhCache 2.7, statistics are enabled by default, and cannot be turned off.
+	 * This setter therefore has no effect in such a scenario.
+	 * @see net.sf.ehcache.Ehcache#setStatisticsEnabled
 	 */
 	public void setStatisticsEnabled(boolean statisticsEnabled) {
 		this.statisticsEnabled = statisticsEnabled;
 	}
 
 	/**
 	 * Set whether to enable EhCache's sampled statistics on this cache.
-	 * @see net.sf.ehcache.Cache#setSampledStatisticsEnabled
+	 * <p>Note: As of EhCache 2.7, statistics are enabled by default, and cannot be turned off.
+	 * This setter therefore has no effect in such a scenario.
+	 * @see net.sf.ehcache.Ehcache#setSampledStatisticsEnabled
 	 */
 	public void setSampledStatisticsEnabled(boolean sampledStatisticsEnabled) {
 		this.sampledStatisticsEnabled = sampledStatisticsEnabled;
@@ -346,11 +356,14 @@ public void afterPropertiesSet() throws CacheException, IOException {
 				this.cacheManager.addCache(rawCache);
 			}
 
-			if (this.statisticsEnabled) {
-				rawCache.setStatisticsEnabled(true);
-			}
-			if (this.sampledStatisticsEnabled) {
-				rawCache.setSampledStatisticsEnabled(true);
+			// Only necessary on EhCache <2.7: As of 2.7, statistics are on by default.
+			if (setStatisticsAvailable) {
+				if (this.statisticsEnabled) {
+					rawCache.setStatisticsEnabled(true);
+				}
+				if (this.sampledStatisticsEnabled) {
+					rawCache.setSampledStatisticsEnabled(true);
+				}
 			}
 			if (this.disabled) {
 				rawCache.setDisabled(true);