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.KafkaFuture;
  
  import java.util.Collection;
  import java.util.HashMap;
  import java.util.Map;
  import java.util.concurrent.ExecutionException;
  
  /**
   * The result of the {@link KafkaAdminClient#describeConsumerGroups(Collection, DescribeConsumerGroupsOptions)}} call.
   */
  public class DescribeConsumerGroupsResult {
  
      private final Map<String, KafkaFuture<ConsumerGroupDescription>> futures;
  
      public DescribeConsumerGroupsResult(final Map<String, KafkaFuture<ConsumerGroupDescription>> futures) {
          this.futures = futures;
      }
  
      /**
       * Return a map from group id to futures which yield group descriptions.
       */
      public Map<String, KafkaFuture<ConsumerGroupDescription>> describedGroups() {
          return new HashMap<>(futures);
      }
  
      /**
       * Return a future which yields all ConsumerGroupDescription objects, if all the describes succeed.
       */
      public KafkaFuture<Map<String, ConsumerGroupDescription>> all() {
          return KafkaFuture.allOf(futures.values().toArray(new KafkaFuture<?>[0])).thenApply(
              nil -> {
                  Map<String, ConsumerGroupDescription> descriptions = new HashMap<>(futures.size());
                  futures.forEach((key, future) -> {
                      try {
                          descriptions.put(key, future.get());
                      } catch (InterruptedException | ExecutionException e) {
                          // This should be unreachable, since the KafkaFuture#allOf already ensured
                          // that all of the futures completed successfully.
                          throw new RuntimeException(e);
                      }
                  });
                  return descriptions;
              });
      }
  }
  