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.spark.shuffle.celeborn;
  
  import org.apache.spark.SparkConf;
  import org.apache.spark.shuffle.api.ShuffleDataIO;
  import org.apache.spark.shuffle.api.ShuffleDriverComponents;
  import org.apache.spark.shuffle.api.ShuffleExecutorComponents;
  import org.apache.spark.shuffle.sort.io.LocalDiskShuffleDriverComponents;
  import org.apache.spark.shuffle.sort.io.LocalDiskShuffleExecutorComponents;
  import org.slf4j.Logger;
  import org.slf4j.LoggerFactory;
  
  import org.apache.celeborn.common.CelebornConf;
  
  public class CelebornShuffleDataIO implements ShuffleDataIO {
  
    private static final Logger logger = LoggerFactory.getLogger(CelebornShuffleDataIO.class);
  
    private final SparkConf sparkConf;
    private final CelebornConf celebornConf;
  
    public CelebornShuffleDataIO(SparkConf sparkConf) {
      logger.info("Loading CelebornShuffleDataIO");
      this.sparkConf = sparkConf;
      this.celebornConf = SparkUtils.fromSparkConf(sparkConf);
    }
  
    @Override
    public ShuffleExecutorComponents executor() {
      // Used when fallback to Spark SortShuffleManager
      return new LocalDiskShuffleExecutorComponents(sparkConf);
    }
  
    @Override
    public ShuffleDriverComponents driver() {
      return new CelebornShuffleDriverComponents(celebornConf);
    }
  }
  
  class CelebornShuffleDriverComponents extends LocalDiskShuffleDriverComponents {
  
    private final boolean supportsReliableStorage;
  
    public CelebornShuffleDriverComponents(CelebornConf celebornConf) {
      this.supportsReliableStorage = !celebornConf.shuffleForceFallbackEnabled();
    }
  
    // Omitting @Override annotation to avoid compile error before Spark 3.5.0
    @SuppressWarnings("MissingOverride")
    public boolean supportsReliableStorage() {
      return supportsReliableStorage;
    }
  }
  