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.admin;
  
  
  import org.apache.kafka.common.ElectionType;
  import org.apache.kafka.common.KafkaFuture;
  import org.apache.kafka.common.TopicPartition;
  import org.apache.kafka.common.internals.KafkaFutureImpl;
  
  import java.util.Map;
  import java.util.Optional;
  import java.util.Set;
  
  /**
   * The result of {@link Admin#electLeaders(ElectionType, Set, ElectLeadersOptions)}
   *
   * The API of this class is evolving, see {@link Admin} for details.
   */
  public final class ElectLeadersResult {
      private final KafkaFuture<Map<TopicPartition, Optional<Throwable>>> electionFuture;
  
      ElectLeadersResult(KafkaFuture<Map<TopicPartition, Optional<Throwable>>> electionFuture) {
          this.electionFuture = electionFuture;
      }
  
      /**
       * <p>Get a future for the topic partitions for which a leader election was attempted.
       * If the election succeeded then the value for a topic partition will be the empty Optional.
       * Otherwise the election failed and the Optional will be set with the error.</p>
       */
      public KafkaFuture<Map<TopicPartition, Optional<Throwable>>> partitions() {
          return electionFuture;
      }
  
      /**
       * Return a future which succeeds if all the topic elections succeed.
       */
      public KafkaFuture<Void> all() {
          final KafkaFutureImpl<Void> result = new KafkaFutureImpl<>();
  
          partitions().whenComplete(
                  (topicPartitions, throwable) -> {
                      if (throwable != null) {
                          result.completeExceptionally(throwable);
                      } else {
                          for (Optional<Throwable> exception : topicPartitions.values()) {
                              if (exception.isPresent()) {
                                  result.completeExceptionally(exception.get());
                                  return;
                              }
                          }
                          result.complete(null);
                      }
                  });
  
          return result;
      }
  }
  