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.kafka.clients.consumer.internals;
  
  import org.apache.kafka.common.TopicPartition;
  
  import java.util.Set;
  
  public class ShareFetchMetricsAggregator {
      private final ShareFetchMetricsManager shareFetchMetricsManager;
      private final FetchMetrics fetchMetrics = new FetchMetrics();
      private final Set<TopicPartition> unrecordedPartitions;
  
      public ShareFetchMetricsAggregator(ShareFetchMetricsManager shareFetchMetricsManager, Set<TopicPartition> partitions) {
          this.shareFetchMetricsManager = shareFetchMetricsManager;
          this.unrecordedPartitions = partitions;
      }
  
      public void record(TopicPartition partition, int bytes, int records) {
          // Aggregate the metrics at the fetch level
          fetchMetrics.increment(bytes, records);
  
          maybeRecordMetrics(partition);
      }
  
      private void maybeRecordMetrics(TopicPartition partition) {
          unrecordedPartitions.remove(partition);
  
          if (!unrecordedPartitions.isEmpty())
              return;
  
          // Record the metrics aggregated at the fetch level.
          shareFetchMetricsManager.recordRecordsFetched(fetchMetrics.records);
          shareFetchMetricsManager.recordBytesFetched(fetchMetrics.bytes);
      }
  
      private static class FetchMetrics {
          private int bytes;
          private int records;
  
          private void increment(int bytes, int records) {
              this.bytes += bytes;
              this.records += records;
          }
  
      }
  }
  