content: /*
   * Copyright 2020-2023 the original author or authors.
   *
   * 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
   *
   *      https://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.jun.mqttx.service;
  
  import com.jun.mqttx.entity.Session;
  import reactor.core.publisher.Mono;
  
  /**
   * 会话相关业务
   *
   * @author Jun
   * @since 1.0.4
   */
  public interface ISessionService {
  
      /**
       * 存储
       *
       * @param session {@link Session}
       */
      Mono<Void> save(Session session);
  
      /**
       * 通过 clientId 获取会话
       *
       * @param clientId 客户端ID
       * @return {@link Session}
       */
      Mono<Session> find(String clientId);
  
      /**
       * 清理会话
       *
       * @param clientId 客户端ID
       * @return true if session exist
       */
      Mono<Boolean> clear(String clientId);
  
      /**
       * 检查 clientId 关联的 session 是否存在
       *
       * @param clientId 客户端ID
       * @return true if session exist
       */
      Mono<Boolean> hasKey(String clientId);
  
      /**
       * 获取 client 的下一个 messageId
       *
       * @param clientId 客户端ID
       * @return next message id
       */
      Mono<Integer> nextMessageId(String clientId);
  }
  