content: package act.app;
  
  /*-
   * #%L
   * ACT Framework
   * %%
   * Copyright (C) 2014 - 2018 ActFramework
   * %%
   * 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.
   * #L%
   */
  
  import java.util.*;
  import java.util.concurrent.ConcurrentHashMap;
  import java.util.concurrent.ConcurrentMap;
  
  // So static map fields can be cleared after app restart
  class ManagedCollectionService extends AppServiceBase<ManagedCollectionService> {
  
      List<Map> mapList = new ArrayList<>();
  
      ManagedCollectionService(App app) {
          super(app);
      }
  
      @Override
      protected void releaseResources() {
          for (Map map : mapList) {
              map.clear();
          }
          mapList.clear();
      }
  
      <K, V> Map<K, V> createMap() {
          Map<K, V> map = new HashMap<>();
          mapList.add(map);
          return map;
      }
  
      <K, V> ConcurrentMap<K, V> createConcurrentMap() {
          ConcurrentMap<K, V> map = new ConcurrentHashMap<>();
          mapList.add(map);
          return map;
      }
  
      <E> Set<E> createSet() {
          return new HashSet<>();
      }
  
  
  
  }
  