/*
 * Copyright 2014-2018 Groupon, Inc
 * Copyright 2014-2018 The Billing Project, LLC
 *
 * The Billing Project licenses this file to you 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.killbill.billing.util.glue;

// import javax.cache.Cache;
// import javax.cache.CacheManager;
// import javax.cache.configuration.Configuration;

// import com.codahale.metrics.Metric;
// import com.codahale.metrics.MetricFilter;
// import com.codahale.metrics.MetricRegistry;
// import com.codahale.metrics.jcache.JCacheGaugeSet;
// import com.google.common.base.Preconditions;

// abstract class CacheProviderBase {

//     private static final String PROP_METRIC_REG_JCACHE_STATISTICS = "jcache.statistics";

//     private final MetricRegistry metricRegistry;

//     CacheProviderBase(final MetricRegistry metricRegistry) {
//         this.metricRegistry = metricRegistry;
//     }

//     <C extends Configuration> void createCache(final CacheManager cacheManager, final String cacheName, final C configuration) {
//         // Make sure we start from a clean state - this is mainly useful for tests
//         cacheManager.destroyCache(cacheName);

//         final Cache cache = cacheManager.createCache(cacheName, configuration);
//         Preconditions.checkState(!cache.isClosed(), "Cache '%s' should not be closed", cacheName);

//         // Re-create the metrics to support dynamically created caches (e.g. for Shiro)
//         metricRegistry.removeMatching(new MetricFilter() {
//             @Override
//             public boolean matches(final String name, final Metric metric) {
//                 return name != null && name.startsWith(PROP_METRIC_REG_JCACHE_STATISTICS);
//             }
//         });
//         metricRegistry.register(PROP_METRIC_REG_JCACHE_STATISTICS, new JCacheGaugeSet());
//     }
// }
