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.events;
  
  import org.apache.kafka.clients.consumer.internals.SubscriptionState;
  import org.apache.kafka.common.TopicPartition;
  
  import java.util.Optional;
  
  /**
   * Event to perform {@link SubscriptionState#seekUnvalidated(TopicPartition, SubscriptionState.FetchPosition)}
   * in the background thread. This can avoid race conditions when subscription state is updated.
   */
  public class SeekUnvalidatedEvent extends CompletableApplicationEvent<Void> {
      private final TopicPartition partition;
      private final long offset;
      private final Optional<Integer> offsetEpoch;
  
      public SeekUnvalidatedEvent(long deadlineMs, TopicPartition partition, long offset, Optional<Integer> offsetEpoch) {
          super(Type.SEEK_UNVALIDATED, deadlineMs);
          this.partition = partition;
          this.offset = offset;
          this.offsetEpoch = offsetEpoch;
      }
  
      public TopicPartition partition() {
          return partition;
      }
  
      public long offset() {
          return offset;
      }
  
      public Optional<Integer> offsetEpoch() {
          return offsetEpoch;
      }
  
      @Override
      protected String toStringBase() {
          return super.toStringBase()
                  + ", partition=" + partition
                  + ", offset=" + offset
                  + offsetEpoch.map(integer -> ", offsetEpoch=" + integer).orElse("");
      }
  }
  