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.activemq.advisory;
  
  import java.util.EventObject;
  
  import jakarta.jms.Destination;
  
  import org.apache.activemq.command.ProducerId;
  
  /**
   * An event when the number of producers on a given destination changes.
   * 
   * 
   */
  public abstract class ProducerEvent extends EventObject {
      private static final long serialVersionUID = 2442156576867593780L;
      private final Destination destination;
      private final ProducerId producerId;
      private final int producerCount;
  
      public ProducerEvent(ProducerEventSource source, Destination destination, ProducerId producerId, int producerCount) {
          super(source);
          this.destination = destination;
          this.producerId = producerId;
          this.producerCount = producerCount;
      }
  
      public ProducerEventSource getAdvisor() {
          return (ProducerEventSource) getSource();
      }
  
      public Destination getDestination() {
          return destination;
      }
  
      /**
       * Returns the current number of producers active at the time this advisory was sent.
       * 
       */
      public int getProducerCount() {
          return producerCount;
      }
  
      public ProducerId getProducerId() {
          return producerId;
      }
  
      public abstract boolean isStarted();
  }
  