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.basecluster.messenger;
  
  import org.apache.bifromq.basecluster.proto.ClusterMessage;
  import io.reactivex.rxjava3.core.Observable;
  import io.reactivex.rxjava3.schedulers.Timed;
  import java.net.InetSocketAddress;
  import java.time.Duration;
  import java.util.List;
  import java.util.concurrent.CompletableFuture;
  
  public interface IMessenger {
      InetSocketAddress bindAddress();
      CompletableFuture<Void> send(ClusterMessage message, InetSocketAddress recipient, boolean reliable);
  
      /**
       * send messages
       *
       * @param message
       * @param piggybackedGossips
       * @param recipient
       * @param reliable
       * @return
       */
      CompletableFuture<Void> send(ClusterMessage message,
                       List<ClusterMessage> piggybackedGossips,
                       InetSocketAddress recipient,
                       boolean reliable);
  
      /**
       * send messages
       *
       * @param message
       * @param piggybackedGossips
       * @param recipient
       * @param reliable
       * @return
       */
      CompletableFuture<Void> send(ClusterMessage message,
                       List<ClusterMessage> piggybackedGossips,
                       InetSocketAddress recipient,
                       String sender,
                       boolean reliable);
  
      /**
       * Spread the message in the cluster
       *
       * @param message
       * @return how long it takes to spread the message within the cluster
       */
      CompletableFuture<Duration> spread(ClusterMessage message);
  
      Observable<Timed<MessageEnvelope>> receive();
  
      void start(IRecipientSelector recipientSelector);
  
      void shutdown();
  }
  