/*
 * 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));
  }
}
