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.streams.processor.assignment;
  
  import org.apache.kafka.common.TopicPartition;
  
  import java.util.Optional;
  import java.util.Set;
  
  /**
   * This is a simple container class used during the assignment process to distinguish
   * TopicPartitions type. Since the assignment logic can depend on the type of topic we're
   * looking at, and the rack information of the partition, this container class should have
   * everything necessary to make informed task assignment decisions.
   */
  public interface TaskTopicPartition {
      /**
       *
       * @return the {@code TopicPartition} for this task.
       */
      TopicPartition topicPartition();
  
      /**
       *
       * @return whether the underlying topic is a source topic or not. Source changelog topics
       *         are both source topics and changelog topics.
       */
      boolean isSource();
  
      /**
       *
       * @return whether the underlying topic is a changelog topic or not. Source changelog topics
       *         are both source topics and changelog topics.
       */
      boolean isChangelog();
  
      /**
       *
       * @return the broker rack ids on which this topic partition resides. If no information could
       *         be found, this will return an empty optional value.
       */
      Optional<Set<String>> rackIds();
  }
  