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.KafkaException;
  import org.apache.kafka.common.KafkaFuture;
  import org.apache.kafka.common.TopicPartition;
  
  import java.util.HashMap;
  import java.util.List;
  import java.util.Map;
  import java.util.concurrent.ExecutionException;
  
  public class DescribeProducersResult {
  
      private final Map<TopicPartition, KafkaFuture<PartitionProducerState>> futures;
  
      DescribeProducersResult(Map<TopicPartition, KafkaFuture<PartitionProducerState>> futures) {
          this.futures = futures;
      }
  
      public KafkaFuture<PartitionProducerState> partitionResult(final TopicPartition partition) {
          KafkaFuture<PartitionProducerState> future = futures.get(partition);
          if (future == null) {
              throw new IllegalArgumentException("Topic partition " + partition +
                  " was not included in the request");
          }
          return future;
      }
  
      public KafkaFuture<Map<TopicPartition, PartitionProducerState>> all() {
          return KafkaFuture.allOf(futures.values().toArray(new KafkaFuture<?>[0]))
              .thenApply(nil -> {
                  Map<TopicPartition, PartitionProducerState> results = new HashMap<>(futures.size());
                  for (Map.Entry<TopicPartition, KafkaFuture<PartitionProducerState>> entry : futures.entrySet()) {
                      try {
                          results.put(entry.getKey(), entry.getValue().get());
                      } catch (InterruptedException | ExecutionException e) {
                          // This should be unreachable, because allOf ensured that all the futures completed successfully.
                          throw new KafkaException(e);
                      }
                  }
                  return results;
              });
      }
  
      public static class PartitionProducerState {
          private final List<ProducerState> activeProducers;
  
          public PartitionProducerState(List<ProducerState> activeProducers) {
              this.activeProducers = activeProducers;
          }
  
          public List<ProducerState> activeProducers() {
              return activeProducers;
          }
  
          @Override
          public String toString() {
              return "PartitionProducerState(" +
                  "activeProducers=" + activeProducers +
                  ')';
          }
      }
  
  }
  