content: /*
   * Copyright 1999-2021 Alibaba Group Holding Ltd.
   *
   * 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.
   */
  
  package com.alibaba.nacos.core.ability;
  
  import com.alibaba.nacos.common.spi.NacosServiceLoader;
  import com.alibaba.nacos.core.utils.Loggers;
  
  import java.util.Collection;
  import java.util.HashSet;
  
  /**
   * Nacos server ability initializer holder.
   *
   * @author xiweng.yy
   */
  public class ServerAbilityInitializerHolder {
      
      private static final ServerAbilityInitializerHolder INSTANCE = new ServerAbilityInitializerHolder();
      
      private final Collection<ServerAbilityInitializer> initializers;
      
      private ServerAbilityInitializerHolder() {
          initializers = new HashSet<>();
          for (ServerAbilityInitializer each : NacosServiceLoader.load(ServerAbilityInitializer.class)) {
              Loggers.CORE.info("Load {} for ServerAbilityInitializer", each.getClass().getCanonicalName());
              initializers.add(each);
          }
      }
      
      public static ServerAbilityInitializerHolder getInstance() {
          return INSTANCE;
      }
      
      public Collection<ServerAbilityInitializer> getInitializers() {
          return initializers;
      }
  }
  