content: package act.plugin;
  
  /*-
   * #%L
   * ACT Framework
   * %%
   * Copyright (C) 2014 - 2017 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 act.Destroyable;
  import act.app.App;
  import act.util.LogSupportedDestroyableBase;
  
  import java.util.HashMap;
  import java.util.Map;
  import javax.enterprise.context.ApplicationScoped;
  
  public class AppServicePluginManager extends LogSupportedDestroyableBase {
  
      private Map<Class<? extends AppServicePlugin>, AppServicePlugin> registry = new HashMap<>();
  
      synchronized void register(AppServicePlugin plugin) {
          if (!registry.containsKey(plugin.getClass())) {
              registry.put(plugin.getClass(), plugin);
          }
      }
  
      public synchronized void applyTo(App app) {
          for (AppServicePlugin plugin : registry.values()) {
              plugin.applyTo(app);
          }
      }
  
      public <T extends AppServicePlugin> T get(Class<T> key) {
          return (T) registry.get(key);
      }
  
      @Override
      protected void releaseResources() {
          Destroyable.Util.tryDestroyAll(registry.values(), ApplicationScoped.class);
          registry = null;
      }
  }
  