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.ConsumerRebalanceListener;
  
  import java.util.Optional;
  import java.util.regex.Pattern;
  
  /**
   * Application event indicating that a user calls the subscribe API for a new pattern.
   * This will make the consumer join a consumer group if not part of it yet,
   * or just send the updated subscription to the broker on the next poll.
   */
  public class TopicPatternSubscriptionChangeEvent extends SubscriptionChangeEvent {
      private final Pattern pattern;
  
      public TopicPatternSubscriptionChangeEvent(final Pattern pattern, final Optional<ConsumerRebalanceListener> listener, final long deadlineMs) {
          super(Type.TOPIC_PATTERN_SUBSCRIPTION_CHANGE, listener, deadlineMs);
          this.pattern = pattern;
      }
  
      public Pattern pattern() {
          return pattern;
      }
  
      @Override
      public String toStringBase() {
          return super.toStringBase() + ", pattern=" + pattern;
      }
  }
  