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 example;
  
  import org.apache.qpid.jms.*;
  import jakarta.jms.*;
  
  class Publisher {
  
      public static void main(String[] args) throws Exception {
  
          final String TOPIC_PREFIX = "topic://";
  
          String user = env("ACTIVEMQ_USER", "admin");
          String password = env("ACTIVEMQ_PASSWORD", "password");
          String host = env("ACTIVEMQ_HOST", "localhost");
          int port = Integer.parseInt(env("ACTIVEMQ_PORT", "5672"));
  
          String connectionURI = "amqp://" + host + ":" + port;
          String destinationName = arg(args, 0, "topic://event");
  
          int messages = 10000;
          int size = 256;
  
          String DATA = "abcdefghijklmnopqrstuvwxyz";
          String body = "";
          for (int i = 0; i < size; i++) {
              body += DATA.charAt(i % DATA.length());
          }
  
          JmsConnectionFactory factory = new JmsConnectionFactory(connectionURI);
  
          Connection connection = factory.createConnection(user, password);
          connection.start();
  
          Session session = connection.createSession(false, Session.AUTO_ACKNOWLEDGE);
  
          Destination destination = null;
          if (destinationName.startsWith(TOPIC_PREFIX)) {
              destination = session.createTopic(destinationName.substring(TOPIC_PREFIX.length()));
          } else {
              destination = session.createQueue(destinationName);
          }
  
          MessageProducer producer = session.createProducer(destination);
          producer.setDeliveryMode(DeliveryMode.NON_PERSISTENT);
  
          for (int i = 1; i <= messages; i++) {
              TextMessage msg = session.createTextMessage("#:" + i);
              msg.setIntProperty("id", i);
              producer.send(msg);
              if ((i % 1000) == 0) {
                  System.out.println(String.format("Sent %d messages", i));
              }
          }
  
          producer.send(session.createTextMessage("SHUTDOWN"));
          Thread.sleep(1000 * 3);
          connection.close();
          System.exit(0);
      }
  
      private static String env(String key, String defaultValue) {
          String rc = System.getenv(key);
          if (rc == null)
              return defaultValue;
          return rc;
      }
  
      private static String arg(String[] args, int index, String defaultValue) {
          if (index < args.length)
              return args[index];
          else
              return defaultValue;
      }
  
  }
  