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.transaction;
  
  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 String BROKER_URL = "tcp://localhost:61616";
  
      // this is set to true
      private static final Boolean TRANSACTED = true;
      private static final Boolean NON_TRANSACTED = false;
  
      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 {
              connection = connectionFactory.createConnection();
              connection.start();
              Topic destination = new ActiveMQTopic("transacted.client.example");
  
              Session senderSession = connection.createSession(TRANSACTED, Session.AUTO_ACKNOWLEDGE);
              Session receiverSession = connection.createSession(NON_TRANSACTED, Session.AUTO_ACKNOWLEDGE);
              MessageConsumer receiver = receiverSession.createConsumer(destination);
              receiver.setMessageListener(new MessageListener() {
                  @Override
                  public void onMessage(Message message) {
                      if (message instanceof TextMessage) {
                          try {
                              String value = ((TextMessage) message).getText();
                              System.out.println("We received a new message: " + value);
                          } catch (JMSException e) {
                              System.out.println("Could not read the receiver's topic because of a JMSException");
                          }
                      }
                  }
              });
  
              MessageProducer sender = senderSession.createProducer(destination);
  
  
              connection.start();
              acceptInputFromUser(senderSession, sender);
              senderSession.close();
              receiverSession.close();
  
          } catch (Exception e) {
              System.out.println("Caught exception!");
          }
          finally {
              if (connection != null) {
                  try {
                      connection.close();
                  } catch (JMSException e) {
                      System.out.println("Could not close an open connection...");
                  }
              }
          }
      }
  
      private static void acceptInputFromUser(Session senderSession, MessageProducer sender) throws JMSException {
          System.out.println("Type a message. Type COMMIT to send to receiver, type ROLLBACK to cancel");
          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) {
                  if (line.trim().equals("ROLLBACK")) {
                      System.out.println("Rolling back...");
                      senderSession.rollback();
                      System.out.println("Messages have been rolledback");
                  } else if (line.trim().equals("COMMIT")) {
                      System.out.println("Committing... ");
                      senderSession.commit();
                      System.out.println("Messages should have been sent");
                  } else {
                      TextMessage message = senderSession.createTextMessage();
                      message.setText(line);
                      System.out.println("Batching up:'" + message.getText() + "'");
                      sender.send(message);
                  }
              }
          }
      }
  }
  