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.producer.internals;
  
  import java.util.ArrayList;
  import java.util.HashSet;
  import java.util.Set;
  import java.util.stream.Collectors;
  
  /*
   * A thread-safe helper class to hold batches that haven't been acknowledged yet (including those
   * which have and have not been sent).
   */
  class IncompleteBatches {
      private final Set<ProducerBatch> incomplete;
  
      public IncompleteBatches() {
          this.incomplete = new HashSet<>();
      }
  
      public void add(ProducerBatch batch) {
          synchronized (incomplete) {
              this.incomplete.add(batch);
          }
      }
  
      public void remove(ProducerBatch batch) {
          synchronized (incomplete) {
              boolean removed = this.incomplete.remove(batch);
              if (!removed)
                  throw new IllegalStateException("Remove from the incomplete set failed. This should be impossible.");
          }
      }
  
      public Iterable<ProducerBatch> copyAll() {
          synchronized (incomplete) {
              return new ArrayList<>(this.incomplete);
          }
      }
  
      public Iterable<ProduceRequestResult> requestResults() {
          synchronized (incomplete) {
              return incomplete.stream().map(batch -> batch.produceFuture).collect(Collectors.toList());
          }
      }
  
      public boolean isEmpty() {
          synchronized (incomplete) {
              return incomplete.isEmpty();
          }
      }
  }
  