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.consumer.internals.events;
  
  import org.apache.kafka.clients.consumer.Consumer;
  import org.apache.kafka.clients.consumer.ConsumerRebalanceListener;
  import org.apache.kafka.clients.consumer.internals.ConsumerRebalanceListenerMethodName;
  import org.apache.kafka.common.TopicPartition;
  
  import java.time.Duration;
  import java.util.Collections;
  import java.util.Objects;
  import java.util.SortedSet;
  
  /**
   * Event that signifies that the network I/O thread wants to invoke one of the callback methods on the
   * {@link ConsumerRebalanceListener}. This event will be processed by the application thread when the next
   * {@link Consumer#poll(Duration)} call is performed by the user. When processed, the application thread should
   * invoke the appropriate callback method (based on {@link #methodName()}) with the given partitions.
   */
  public class ConsumerRebalanceListenerCallbackNeededEvent extends CompletableBackgroundEvent<Void> {
  
      private final ConsumerRebalanceListenerMethodName methodName;
      private final SortedSet<TopicPartition> partitions;
  
      public ConsumerRebalanceListenerCallbackNeededEvent(final ConsumerRebalanceListenerMethodName methodName,
                                                          final SortedSet<TopicPartition> partitions) {
          super(Type.CONSUMER_REBALANCE_LISTENER_CALLBACK_NEEDED, Long.MAX_VALUE);
          this.methodName = Objects.requireNonNull(methodName);
          this.partitions = Collections.unmodifiableSortedSet(partitions);
      }
  
      public ConsumerRebalanceListenerMethodName methodName() {
          return methodName;
      }
  
      public SortedSet<TopicPartition> partitions() {
          return partitions;
      }
  
      @Override
      protected String toStringBase() {
          return super.toStringBase() +
                  ", methodName=" + methodName +
                  ", partitions=" + partitions;
      }
  }
  