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.wildcard;
  
  import org.apache.activemq.ActiveMQConnectionFactory;
  import org.apache.activemq.command.ActiveMQTopic;
  
  import jakarta.jms.*;
  import java.util.Scanner;
  
  /**
   * @author <a href="http://www.christianposta.com/blog">Christian Posta</a>
   */
  public class Client {
      private static final Boolean NON_TRANSACTED = false;
      private static final String BROKER_URL = "tcp://localhost:61616";
  
      public static void main(String[] args) {
          String url = BROKER_URL;
          if (args.length > 0) {
              url = args[0].trim();
          }
          ActiveMQConnectionFactory connectionFactory = new ActiveMQConnectionFactory("admin", "password", url);
          Connection connection = null;
  
          try {
              Topic senderTopic = new ActiveMQTopic(System.getProperty("topicName"));
  
              connection = connectionFactory.createConnection("admin", "password");
  
              Session senderSession = connection.createSession(NON_TRANSACTED, Session.AUTO_ACKNOWLEDGE);
              MessageProducer sender = senderSession.createProducer(senderTopic);
  
              Session receiverSession = connection.createSession(NON_TRANSACTED, Session.AUTO_ACKNOWLEDGE);
  
              String policyType = System.getProperty("wildcard", ".*");
              String receiverTopicName = senderTopic.getTopicName() + policyType;
              Topic receiverTopic = receiverSession.createTopic(receiverTopicName);
  
              MessageConsumer receiver = receiverSession.createConsumer(receiverTopic);
              receiver.setMessageListener(new MessageListener() {
                  public void onMessage(Message message) {
                      try {
                          if (message instanceof TextMessage) {
                              String text = ((TextMessage) message).getText();
                              System.out.println("We received a new message: " + text);
                          }
                      } catch (JMSException e) {
                          System.out.println("Could not read the receiver's topic because of a JMSException");
                      }
                  }
              });
  
              connection.start();
              System.out.println("Listening on '" + receiverTopicName + "'");
              System.out.println("Enter a message to send: ");
  
              Scanner inputReader = new Scanner(System.in);
  
              while (true) {
                  String line = inputReader.nextLine();
                  if (line == null) {
                      System.out.println("Done!");
                      break;
                  } else if (line.length() > 0) {
                      try {
                          TextMessage message = senderSession.createTextMessage();
                          message.setText(line);
                          System.out.println("Sending a message: " + message.getText());
                          sender.send(message);
                      } catch (JMSException e) {
                          System.out.println("Exception during publishing a message: ");
                      }
                  }
              }
  
              receiver.close();
              receiverSession.close();
              sender.close();
              senderSession.close();
  
          } catch (Exception e) {
              System.out.println("Caught exception!");
          } finally {
              if (connection != null) {
                  try {
                      connection.close();
                  } catch (JMSException e) {
                      System.out.println("When trying to close connection: ");
                  }
              }
          }
  
      }
  }
  