content: /*
   * Licensed to the Apache Software Foundation (ASF) under one
   * or more contributor license agreements.  See the NOTICE file
   * distributed with this work for additional information
   * regarding copyright ownership.  The ASF licenses this file
   * to you 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 org.apache.bifromq.mqtt.session;
  
  import org.apache.bifromq.type.TopicMessagePack;
  import java.util.Set;
  
  /**
   * The interface of transient session.
   */
  public interface IMQTTTransientSession extends IMQTTSession {
      String NAME = "MQTTTransientSession";
  
      /**
       * Publish message to the topic filters, and return the topic filters that are not subscribed.
       *
       * @param messagePack         The message pack to publish.
       * @param matchedTopicFilters The topic filters to publish.
       * @return The topic filters that are not subscribed.
       */
      Set<MatchedTopicFilter> publish(TopicMessagePack messagePack, Set<MatchedTopicFilter> matchedTopicFilters);
  
      boolean hasSubscribed(String topicFilter);
  
      /**
       * The matched topic filter.
       *
       * @param topicFilter The topic filter.
       * @param incarnation The incarnation.
       */
      record MatchedTopicFilter(String topicFilter, long incarnation) {
      }
  }
  