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.naming.core.v2.client.manager;
  
  import com.alibaba.nacos.naming.consistency.ephemeral.distro.v2.DistroClientVerifyInfo;
  import com.alibaba.nacos.naming.core.v2.client.Client;
  import com.alibaba.nacos.naming.core.v2.client.ClientAttributes;
  
  import java.util.Collection;
  
  /**
   * The manager of {@code Client} Nacos naming client.
   *
   * @author xiweng.yy
   */
  public interface ClientManager {
      
      /**
       * New client connected.
       *
       * @param clientId new client id
       * @param attributes client attributes, which can help create client
       * @return true if add successfully, otherwise false
       */
      boolean clientConnected(String clientId, ClientAttributes attributes);
      
      /**
       * New client connected.
       *
       * @param client new client
       * @return true if add successfully, otherwise false
       */
      boolean clientConnected(Client client);
      
      /**
       * New sync client connected.
       *
       * @param clientId   synced client id
       * @param attributes client sync attributes, which can help create sync client
       * @return true if add successfully, otherwise false
       */
      boolean syncClientConnected(String clientId, ClientAttributes attributes);
      
      /**
       * Client disconnected.
       *
       * @param clientId client id
       * @return true if remove successfully, otherwise false
       */
      boolean clientDisconnected(String clientId);
      
      /**
       * Get client by id.
       *
       * @param clientId client id
       * @return client
       */
      Client getClient(String clientId);
      
      /**
       * Whether the client id exists.
       *
       * @param clientId client id
       * @return client
       */
      boolean contains(final String clientId);
      
      /**
       * All client id.
       *
       * @return collection of client id
       */
      Collection<String> allClientId();
      
      /**
       * Whether the client is responsible by current server.
       *
       * @param client client
       * @return true if responsible, otherwise false
       */
      boolean isResponsibleClient(Client client);
      
      /**
       * verify client.
       *
       * @param verifyData verify data from remote responsible server
       * @return true if client is valid, otherwise is false.
       */
      boolean verifyClient(DistroClientVerifyInfo verifyData);
  }
  