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.shuffledb;
  
  import java.util.Locale;
  
  /**
   * The enum `DBBackend` use to specify a disk-based store used in shuffle service local db. Support
   * the use of LevelDB and RocksDB.
   *
   * <p>Note: code copied from Apache Spark.
   */
  public enum DBBackend {
    LEVELDB(".ldb"),
    ROCKSDB(".rdb");
  
    private final String fileSuffix;
  
    DBBackend(String fileSuffix) {
      this.fileSuffix = fileSuffix;
    }
  
    public String fileName(String prefix) {
      return prefix + fileSuffix;
    }
  
    public static DBBackend byName(String value) {
      return DBBackend.valueOf(value.toUpperCase(Locale.ROOT));
    }
  }
  