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 accord.api;
  
  import accord.local.Node.Id;
  import accord.messages.Callback;
  import accord.messages.Reply;
  import accord.messages.ReplyContext;
  import accord.messages.Request;
  import accord.utils.async.Cancellable;
  
  public interface MessageSink
  {
      void send(Id to, Request request);
      default Cancellable send(Id to, Request request, AsyncExecutor executor, Callback<?> callback)
      {
          return send(to, request, 1, executor, callback);
      }
      Cancellable send(Id to, Request request, int attempt, AsyncExecutor executor, Callback<?> callback);
      void reply(Id replyingToNode, ReplyContext replyContext, Reply reply);
      void replyWithUnknownFailure(Id replyingToNode, ReplyContext replyContext, Throwable failure);
  }
  