EhcacheShiroManagerProvider.java

/*
 * Copyright 2010-2013 Ning, Inc.
 * Copyright 2014-2017 Groupon, Inc
 * Copyright 2014-2017 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 java.lang.reflect.Field;

// import javax.cache.CacheManager;
// import javax.inject.Inject;
// import javax.inject.Provider;

// import org.apache.shiro.cache.Cache;
// import org.apache.shiro.cache.CacheException;
// import org.apache.shiro.mgt.DefaultSecurityManager;
// import org.apache.shiro.mgt.SecurityManager;
// import org.apache.shiro.mgt.SubjectDAO;
// import org.ehcache.integrations.shiro.EhcacheShiro;
// import org.ehcache.integrations.shiro.EhcacheShiroManager;
// import org.killbill.billing.util.config.definition.EhCacheConfig;
// import org.slf4j.Logger;
// import org.slf4j.LoggerFactory;

// import com.codahale.metrics.MetricRegistry;

// public class EhcacheShiroManagerProvider extends EhCacheProviderBase implements Provider<EhcacheShiroManager> {

//     private final SecurityManager securityManager;
//     private final SubjectDAO subjectDAO;
//     private final CacheManager eh107CacheManager;
//     private final org.ehcache.CacheManager ehcacheCacheManager;

//     @Inject
//     public EhcacheShiroManagerProvider(final SecurityManager securityManager,
//                                        final SubjectDAO subjectDAO,
//                                        final CacheManager eh107CacheManager,
//                                        final MetricRegistry metricRegistry,
//                                        final EhCacheConfig cacheConfig) {
//         super(metricRegistry, cacheConfig);
//         this.securityManager = securityManager;
//         this.subjectDAO = subjectDAO;
//         this.eh107CacheManager = eh107CacheManager;
//         this.ehcacheCacheManager = getEhcacheManager();
//     }

//     @Override
//     public EhcacheShiroManager get() {
//         final EhcacheShiroManager shiroEhCacheManager = new EhcacheShiroManagerWrapper(this);
//         // Same EhCache manager instance as the rest of the system
//         shiroEhCacheManager.setCacheManager(ehcacheCacheManager);

//         if (securityManager instanceof DefaultSecurityManager) {
//             // For RBAC only (see also KillbillJdbcTenantRealmProvider)
//             final DefaultSecurityManager securityManager = (DefaultSecurityManager) this.securityManager;
//             securityManager.setCacheManager(shiroEhCacheManager);
//             securityManager.setSubjectDAO(subjectDAO);
//         }

//         return shiroEhCacheManager;
//     }

//     // Shiro isn't JCache compatible
//     private org.ehcache.CacheManager getEhcacheManager() {
//         try {
//             final Field f = eh107CacheManager.getClass().getDeclaredField("ehCacheManager");
//             f.setAccessible(true);

//             return (org.ehcache.CacheManager) f.get(eh107CacheManager);
//         } catch (final IllegalAccessException e) {
//             throw new RuntimeException(e);
//         } catch (final NoSuchFieldException e) {
//             throw new RuntimeException(e);
//         }
//     }

//     // Custom createCache implementation going through JCache layer to enable stats, etc.
//     private final class EhcacheShiroManagerWrapper extends EhcacheShiroManager {

//         private final Logger log = LoggerFactory.getLogger(EhcacheShiroManagerWrapper.class);

//         // shiro-activeSessionCache is lazily created by the first request and EhcacheShiroManagerProvider isn't thread safe
//         private final Object shiroCacheLock = new Object();

//         private final EhcacheShiroManagerProvider ehcacheShiroManagerProvider;

//         EhcacheShiroManagerWrapper(final EhcacheShiroManagerProvider ehcacheShiroManagerProvider) {
//             this.ehcacheShiroManagerProvider = ehcacheShiroManagerProvider;
//         }

//         public <K, V> Cache<K, V> getCache(final String name) throws CacheException {
//             log.trace("Acquiring EhcacheShiro instance named [{}]", name);

//             org.ehcache.Cache<Object, Object> cache = getCacheManager().getCache(name, Object.class, Object.class);

//             if (cache == null) {
//                 synchronized (shiroCacheLock) {
//                     cache = getCacheManager().getCache(name, Object.class, Object.class);
//                     if (cache == null) {
//                         log.info("Cache with name {} does not yet exist.  Creating now.", name);
//                         ehcacheShiroManagerProvider.createCache(eh107CacheManager, name, Object.class, Object.class);
//                         cache = getCacheManager().getCache(name, Object.class, Object.class);
//                         log.info("Added EhcacheShiro named [{}]", name);
//                     } else {
//                         log.info("Using existing EhcacheShiro named [{}]", name);
//                     }
//                 }
//             } else {
//                 log.info("Using existing EhcacheShiro named [{}]", name);
//             }

//             return new EhcacheShiro<K, V>(cache);
//         }
//     }
// }