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.plugin.flink;
  
  import java.util.concurrent.ConcurrentHashMap;
  import java.util.concurrent.atomic.AtomicInteger;
  
  import org.slf4j.Logger;
  import org.slf4j.LoggerFactory;
  
  import org.apache.celeborn.common.util.JavaUtils;
  
  public class ShuffleTaskInfo {
    private static final Logger LOG = LoggerFactory.getLogger(ShuffleTaskInfo.class);
  
    private int currentShuffleIndex = 0;
    // map attemptId index
    private ConcurrentHashMap<Integer, ConcurrentHashMap<Integer, AtomicInteger>>
        shuffleIdMapAttemptIdIndex = JavaUtils.newConcurrentHashMap();
    // task shuffle id -> celeborn shuffle id
    private final ConcurrentHashMap<String, Integer> taskShuffleIdToShuffleId =
        JavaUtils.newConcurrentHashMap();
    // celeborn shuffle id -> task shuffle id
    private ConcurrentHashMap<Integer, String> shuffleIdToTaskShuffleId =
        JavaUtils.newConcurrentHashMap();
  
    private ConcurrentHashMap<Integer, AtomicInteger> shuffleIdPartitionIdIndex =
        JavaUtils.newConcurrentHashMap();
  
    public int getShuffleId(String taskShuffleId) {
      synchronized (taskShuffleIdToShuffleId) {
        if (taskShuffleIdToShuffleId.containsKey(taskShuffleId)) {
          return taskShuffleIdToShuffleId.get(taskShuffleId);
        } else {
          taskShuffleIdToShuffleId.put(taskShuffleId, currentShuffleIndex);
          shuffleIdToTaskShuffleId.put(currentShuffleIndex, taskShuffleId);
          shuffleIdMapAttemptIdIndex.put(currentShuffleIndex, JavaUtils.newConcurrentHashMap());
          shuffleIdPartitionIdIndex.put(currentShuffleIndex, new AtomicInteger(0));
          int tempShuffleIndex = currentShuffleIndex;
          currentShuffleIndex = currentShuffleIndex + 1;
          return tempShuffleIndex;
        }
      }
    }
  
    public int genAttemptId(int shuffleId, int mapId) {
      AtomicInteger currentAttemptIndex =
          shuffleIdMapAttemptIdIndex
              .get(shuffleId)
              .computeIfAbsent(mapId, (id) -> new AtomicInteger(0));
      return currentAttemptIndex.getAndIncrement();
    }
  
    public int genPartitionId(int shuffleId) {
      return shuffleIdPartitionIdIndex.get(shuffleId).getAndIncrement();
    }
  
    public void removeExpiredShuffle(int shuffleId) {
      if (shuffleIdToTaskShuffleId.containsKey(shuffleId)) {
        shuffleIdPartitionIdIndex.remove(shuffleId);
        shuffleIdMapAttemptIdIndex.remove(shuffleId);
        String taskShuffleId = shuffleIdToTaskShuffleId.remove(shuffleId);
        taskShuffleIdToShuffleId.remove(taskShuffleId);
      }
    }
  
    public ShuffleResourceDescriptor genShuffleResourceDescriptor(
        String taskShuffleId, int mapId, String taskAttemptId) {
      int shuffleId = this.getShuffleId(taskShuffleId);
      int attemptId = this.genAttemptId(shuffleId, mapId);
      int partitionId = this.genPartitionId(shuffleId);
      LOG.info(
          "Assign for ({}, {}, {}) resource ({}, {}, {}, {})",
          taskShuffleId,
          mapId,
          taskAttemptId,
          shuffleId,
          mapId,
          attemptId,
          partitionId);
      return new ShuffleResourceDescriptor(shuffleId, mapId, attemptId, partitionId);
    }
  }
  