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.io.Closeable;
  
  /** Note: code copied from Apache Spark. */
  public interface DB extends Closeable {
    /** Set the DB entry for "key" to "value". */
    void put(byte[] key, byte[] value);
  
    /** Set the DB entry for "key" to "value". Support Sync option */
    void put(byte[] key, byte[] value, boolean sync);
  
    /**
     * Get which returns a new byte array storing the value associated with the specified input key if
     * any.
     */
    byte[] get(byte[] key);
  
    /** Delete the DB entry (if any) for "key". */
    void delete(byte[] key);
  
    /** Return an iterator over the contents of the DB. */
    DBIterator iterator();
  }
  