CaffeineCacheStatisticsProvider.java

/*
 * Copyright 2012-2016 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
 *
 *      http://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.cache;

import com.github.benmanes.caffeine.cache.stats.CacheStats;

import org.springframework.cache.CacheManager;
import org.springframework.cache.caffeine.CaffeineCache;

/**
 * {@link CacheStatisticsProvider} implementation for Caffeine.
 *
 * @author Eddú Meléndez
 * @since 1.4.0
 */
public class CaffeineCacheStatisticsProvider
		implements CacheStatisticsProvider<CaffeineCache> {

	@Override
	public CacheStatistics getCacheStatistics(CacheManager cacheManager,
			CaffeineCache cache) {
		DefaultCacheStatistics statistics = new DefaultCacheStatistics();
		statistics.setSize(cache.getNativeCache().estimatedSize());
		CacheStats caffeineStatistics = cache.getNativeCache().stats();
		if (caffeineStatistics.requestCount() > 0) {
			statistics.setHitRatio(caffeineStatistics.hitRate());
			statistics.setMissRatio(caffeineStatistics.missRate());
		}
		return statistics;
	}

}