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.celeborn.service.deploy.worker;
  
  import java.nio.charset.StandardCharsets;
  
  import org.apache.celeborn.service.deploy.worker.shuffledb.StoreVersion;
  
  public abstract class ShuffleRecoverHelper {
    protected String SHUFFLE_KEY_PREFIX = "SHUFFLE-KEY";
    protected StoreVersion CURRENT_VERSION = new StoreVersion(1, 0);
  
    protected byte[] dbShuffleKey(String shuffleKey) {
      return (SHUFFLE_KEY_PREFIX + ";" + shuffleKey).getBytes(StandardCharsets.UTF_8);
    }
  
    protected String parseDbShuffleKey(String s) {
      if (!s.startsWith(SHUFFLE_KEY_PREFIX)) {
        throw new IllegalArgumentException("Expected a string starting with " + SHUFFLE_KEY_PREFIX);
      }
      return s.substring(SHUFFLE_KEY_PREFIX.length() + 1);
    }
  }
  