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;
  
  import org.apache.kafka.common.TopicPartition;
  
  import java.time.Duration;
  import java.util.Collection;
  import java.util.Map;
  
  /**
   * A callback interface that the user can implement to trigger custom actions when a commit request completes. The callback
   * may be executed in any thread calling {@link Consumer#poll(java.time.Duration) poll()}.
   */
  @FunctionalInterface
  public interface OffsetCommitCallback {
  
      /**
       * A callback method the user can implement to provide asynchronous handling of commit request completion.
       * This method will be called when the commit request sent to the server has been acknowledged.
       *
       * @param offsets A map of the offsets and associated metadata that this callback applies to
       * @param exception The exception thrown during processing of the request, or null if the commit completed successfully
       *
       * @throws org.apache.kafka.clients.consumer.CommitFailedException if the commit failed and cannot be retried.
       *             This can only occur if you are using automatic group management with {@link KafkaConsumer#subscribe(Collection)},
       *             or if there is an active group with the same groupId which is using group management.
       * @throws org.apache.kafka.common.errors.RebalanceInProgressException if the commit failed because
       *            it is in the middle of a rebalance. In such cases
       *            commit could be retried after the rebalance is completed with the {@link KafkaConsumer#poll(Duration)} call.
       * @throws org.apache.kafka.common.errors.WakeupException if {@link KafkaConsumer#wakeup()} is called before or while this
       *             function is called
       * @throws org.apache.kafka.common.errors.InterruptException if the calling thread is interrupted before or while
       *             this function is called
       * @throws org.apache.kafka.common.errors.AuthorizationException if not authorized to the topic or to the
       *             configured groupId. See the exception for more details
       * @throws org.apache.kafka.common.KafkaException for any other unrecoverable errors (e.g. if offset metadata
       *             is too large or if the committed offset is invalid).
       */
      void onComplete(Map<TopicPartition, OffsetAndMetadata> offsets, Exception exception);
  }
  