/**
    * Copyright 2004-2014 The Kuali Foundation
    *
    * Licensed under the Educational Community 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.opensource.org/licenses/ecl2.php
    *
   * 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.kuali.kpme.core.cache;
  
  
  import java.util.List;
  
  import org.apache.commons.lang.StringUtils;
  import org.apache.log4j.Logger;
  import org.kuali.rice.core.api.resourceloader.GlobalResourceLoader;
  import org.kuali.rice.core.impl.cache.DistributedCacheManagerDecorator;
  
  public class CacheUtils {
      private static final Logger LOG = Logger.getLogger(CacheUtils.class);
  
      public static void flushCache(String cacheName) {
          //flush cache
          //DistributedCacheManagerDecorator distributedCacheManagerDecorator =
          //        HrServiceLocator.getDistributedCacheManager();
  
          String cacheDecoratorName = extractCacheDecoratorName(cacheName);
          if (StringUtils.isNotEmpty(cacheDecoratorName)) {
              DistributedCacheManagerDecorator distributedCacheManagerDecorator =
                      GlobalResourceLoader.getService(cacheDecoratorName);
              if (distributedCacheManagerDecorator != null) {
              	if(distributedCacheManagerDecorator.getCache(cacheName) == null) {
              		LOG.error("Cache: " + cacheName + " not found.");
              	} else {
              		distributedCacheManagerDecorator.getCache(cacheName).clear();
              	}
                  
              } else {
                  LOG.error("DistributedCacheManagerDecorator: " + cacheDecoratorName + " not found.  Cache: " + cacheName + " was not flushed.");
              }
          }
      }
  
      public static void flushCaches(List<String> cacheNames) {
          //flush cache
          for (String cache : cacheNames) {
              String cacheDecoratorName = extractCacheDecoratorName(cache);
              if (StringUtils.isNotEmpty(cacheDecoratorName)) {
                  DistributedCacheManagerDecorator distributedCacheManagerDecorator =
                          GlobalResourceLoader.getService(cacheDecoratorName);
                  if (distributedCacheManagerDecorator != null) {
                      distributedCacheManagerDecorator.getCache(cache).clear();
                  } else {
                      LOG.error("DistributedCacheManagerDecorator: " + cacheDecoratorName + " not found.  Cache: " + cache + " was not flushed.");
                  }
              }
          }
      }
  
      private static String extractCacheDecoratorName(String cacheName) {
          String[] splitName = cacheName.split("/");
          if (splitName.length >= 4) {
              return "kpme" + StringUtils.capitalize(splitName[3]) + "DistributedCacheManager";
          }
          LOG.warn("Unable to extract cache decorator bean name from " + cacheName + ". Cache will not be flushed");
          return StringUtils.EMPTY;
      }
  }