content: /*
   * Copyright 1999-2018 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.cluster;
  
  import com.alibaba.nacos.api.exception.NacosException;
  
  import java.util.Collection;
  import java.util.Collections;
  import java.util.Map;
  
  /**
   * Member node addressing mode.
   *
   * @author <a href="mailto:liaochuntao@live.com">liaochuntao</a>
   */
  public interface MemberLookup {
      
      /**
       * start.
       *
       * @throws NacosException NacosException
       */
      void start() throws NacosException;
      
      /**
       * is using address server.
       *
       * @return using address server or not.
       */
      boolean useAddressServer();
      
      /**
       * Inject the ServerMemberManager property.
       *
       * @param memberManager {@link NacosMemberManager}
       */
      void injectMemberManager(NacosMemberManager memberManager);
      
      /**
       * The addressing pattern finds cluster nodes.
       *
       * @param members {@link Collection}
       */
      void afterLookup(Collection<Member> members);
      
      /**
       * Addressing mode closed.
       *
       * @throws NacosException NacosException
       */
      void destroy() throws NacosException;
      
      /**
       * Some data information about the addressing pattern.
       *
       * @return {@link Map}
       */
      default Map<String, Object> info() {
          return Collections.emptyMap();
      }
      
  }
  