| /* |
| * 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 org.apache.activemq.artemis.jms.example; |
| |
| import javax.jms.Connection; |
| import javax.jms.ConnectionFactory; |
| import javax.jms.MessageConsumer; |
| import javax.jms.MessageProducer; |
| import javax.jms.Queue; |
| import javax.jms.Session; |
| import javax.jms.TextMessage; |
| |
| import org.apache.qpid.jms.JmsConnectionFactory; |
| |
| /** |
| * On this example, two brokers are mirrored. |
| * Everything that is happening on the first broker will be mirrored on the second, and Vice Versa. |
| */ |
| public class DisasterAndRecovery { |
| |
| public static void main(final String[] args) throws Exception { |
| ConnectionFactory cfServer0 = new JmsConnectionFactory("amqp://localhost:5660"); |
| ConnectionFactory cfServer1 = new JmsConnectionFactory("amqp://localhost:5661"); |
| |
| try (Connection connection = cfServer0.createConnection()) { |
| Session session = connection.createSession(false, Session.AUTO_ACKNOWLEDGE); |
| Queue queue = session.createQueue("exampleQueue"); |
| MessageProducer producer = session.createProducer(queue); |
| |
| for (int i = 0; i < 100; i++) { |
| producer.send(session.createTextMessage("Message " + i)); |
| } |
| } |
| |
| // Every message send on server0, will be mirrored into server1 |
| try (Connection connection = cfServer1.createConnection()) { |
| Session session = connection.createSession(false, Session.AUTO_ACKNOWLEDGE); |
| Queue queue = session.createQueue("exampleQueue"); |
| connection.start(); |
| MessageConsumer consumer = session.createConsumer(queue); |
| // we will consume only half of the messages on this server |
| for (int i = 0; i < 50; i++) { |
| TextMessage message = (TextMessage) consumer.receive(5000); |
| System.out.println("Received Message on server1: " + message.getText()); |
| if (!message.getText().equals("Message " + i)) { |
| // This is really not supposed to happen. We will throw an exception and in case it happens it needs to be investigated |
| throw new IllegalStateException("Mirror Example is not working as expected"); |
| } |
| } |
| } |
| |
| // mirroring of acknowledgemnts are asynchronous They are fast but still asynchronous. So lets wait some time to let the ack be up to date between the servers |
| // a few milliseconds would do, but I'm waiting a second just in case |
| Thread.sleep(1000); |
| |
| // Every message send on server0, will be mirrored into server1 |
| try (Connection connection = cfServer0.createConnection()) { |
| Session session = connection.createSession(false, Session.AUTO_ACKNOWLEDGE); |
| Queue queue = session.createQueue("exampleQueue"); |
| connection.start(); |
| MessageConsumer consumer = session.createConsumer(queue); |
| // we will consume only half of the messages on this server |
| for (int i = 50; i < 100; i++) { |
| TextMessage message = (TextMessage) consumer.receive(5000); |
| System.out.println("Received Message on the original server0: " + message.getText()); |
| if (!message.getText().equals("Message " + i)) { |
| // This is really not supposed to happen. We will throw an exception and in case it happens it needs to be investigated |
| throw new IllegalStateException("Mirror Example is not working as expected"); |
| } |
| } |
| } |
| } |
| } |