/**
* 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 javax.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);
}
}
}
}
}