code: /*******************************************************************************
   * Copyright 2018 572682
   * 
   * Licensed 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 us.dot.its.jpo.ode.exporter;
  
  import org.slf4j.Logger;
  import org.slf4j.LoggerFactory;
  
  import us.dot.its.jpo.ode.wrapper.MessageConsumer;
  
  public abstract class Exporter implements Runnable {
  
      private Logger logger = LoggerFactory.getLogger(this.getClass());
  
      private MessageConsumer<?, ?> consumer;
      private String topic;
  
      public Exporter(String topic) {
          this.topic = topic;
      }
  
      public Exporter(String topic, MessageConsumer<?, ?> consumer) {
          this.topic = topic;
          this.consumer = consumer;
      }
  
      @Override
      public void run() {
          logger.info("Subscribing to {}", topic);
          subscribe();
  
          shutDown();
      }
  
      protected abstract void subscribe();
  
      public void shutDown() {
          logger.info("Shutting down Exporter to topic {}", topic);
          if (consumer != null)
              consumer.close();
      }
  
      @SuppressWarnings("rawtypes")
     public MessageConsumer getConsumer() {
          return consumer;
      }
  
      public void setConsumer(MessageConsumer<?, ?> consumer) {
          this.consumer = consumer;
      }
  
      public String getTopic() {
          return topic;
      }
  
      public void setTopic(String topic) {
          this.topic = topic;
      }
  
  }
  