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.common.write;
  
  import java.util.ArrayList;
  
  import org.apache.celeborn.common.protocol.PartitionLocation;
  
  public class DataBatches {
    private int totalSize = 0;
    private ArrayList<DataBatch> batches = new ArrayList<>();
  
    public static class DataBatch {
      public final PartitionLocation loc;
      public final int batchId;
      public final byte[] body;
  
      public DataBatch(PartitionLocation loc, int batchId, byte[] body) {
        this.loc = loc;
        this.batchId = batchId;
        this.body = body;
      }
    }
  
    public synchronized void addDataBatch(PartitionLocation loc, int batchId, byte[] body) {
      DataBatch dataBatch = new DataBatch(loc, batchId, body);
      batches.add(dataBatch);
      totalSize += body.length;
    }
  
    public int getTotalSize() {
      return totalSize;
    }
  
    public ArrayList<DataBatch> requireBatches() {
      totalSize = 0;
      ArrayList<DataBatch> allBatches = batches;
      batches = null;
      return allBatches;
    }
  
    public ArrayList<DataBatch> requireBatches(int requestSize) {
      if (requestSize >= totalSize) {
        totalSize = 0;
        return batches;
      }
      ArrayList<DataBatch> retBatches = new ArrayList<>();
      int currentSize = 0;
      while (currentSize < requestSize) {
        DataBatch elem = batches.remove(0);
        retBatches.add(elem);
        currentSize += elem.body.length;
        totalSize -= elem.body.length;
      }
      return retBatches;
    }
  }
  