content: /*
   * Copyright (C) 2020 ActiveJ LLC.
   *
   * 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 io.activej.ot.uplink;
  
  import io.activej.promise.Promise;
  
  import java.util.List;
  
  public interface AsyncOTUplink<K, D, PC> {
  
  	record FetchData<K, D>(K commitId, long level, List<D> diffs) {
  	}
  
  	Promise<FetchData<K, D>> checkout();
  
  	Promise<FetchData<K, D>> fetch(K currentCommitId);
  
  	default Promise<FetchData<K, D>> poll(K currentCommitId) {
  		return fetch(currentCommitId);
  	}
  
  	Promise<PC> createProtoCommit(K parent, List<D> diffs, long parentLevel);
  
  	Promise<FetchData<K, D>> push(PC protoCommit);
  
  }
  