Ejemplos prácticos del uso de Java Message Service (JMS) con ActiveMQ

Agregue los paquetes activemq-client.jar y activemq-pool.jar a la ruta de clases de Java. Los siguientes ejemplos muestran estas dependencias en el archivo pom.xml de un proyecto Maven.

<dependencies>
    <dependency>
        <groupId>org.apache.activemq</groupId>
        <artifactId>activemq-client</artifactId>
        <version>5.15.16</version>
    </dependency>
    <dependency>
        <groupId>org.apache.activemq</groupId>
        <artifactId>activemq-pool</artifactId>
        <version>5.15.16</version>
    </dependency>
</dependencies>

Para obtener más información acerca de activemq-client.jar, consulte el tema sobre la configuración inicial en la documentación de Apache ActiveMQ.

Añada el paquete org.eclipse.paho.client.mqttv3.jar en la ruta de clases de Java. En el siguiente ejemplo se muestra esta dependencia en el archivo pom.xml de un proyecto Maven.

<dependencies>
                    <dependency>
                        <groupId>org.eclipse.paho</groupId>
                        <artifactId>org.eclipse.paho.client.mqttv3</artifactId>
                        <version>1.2.0</version>
                    </dependency>                               
                    </dependencies>

Para obtener más información sobre org.eclipse.paho.client.mqttv3.jar, consulte Cliente Java de Eclipse Paho.

Añada los paquetes siguientes a la ruta de clases de Java:

Los siguientes ejemplos muestran estas dependencias en el archivo pom.xml de un proyecto Maven.

<dependencies>
                    <dependency>
                        <groupId>org.springframework</groupId>
                        <artifactId>spring-messaging</artifactId>
                        <version>5.0.5.RELEASE</version>
                    </dependency>
                    <dependency>
                        <groupId>org.springframework</groupId>
                        <artifactId>spring-websocket</artifactId>
                        <version>5.0.5.RELEASE</version>
                    </dependency>
                    <dependency>
                        <groupId>javax.websocket</groupId>
                        <artifactId>javax.websocket-api</artifactId>
                        <version>1.1</version>
                    </dependency>
                    <dependency>
                        <groupId>org.eclipse.jetty.aggregate</groupId>
                        <artifactId>jetty-all</artifactId>
                        <type>pom</type>
                        <version>9.3.3.v20150827</version>
                    </dependency>
                    <dependency>
                        <groupId>org.slf4j</groupId>
                        <artifactId>slf4j-simple</artifactId>
                        <version>1.6.6</version>
                    </dependency>
                    <dependency>
                        <groupId>com.fasterxml.jackson.core</groupId>
                        <artifactId>jackson-databind</artifactId>
                        <version>2.5.0</version>
                    </dependency>
                    </dependencies>

Para obtener más información, consulte STOMPSupport en la documentación de Spring Framework.

/*
 * Copyright 2010-2019 Amazon.com, Inc. or its affiliates. All Rights Reserved.
 *
 * Licensed under the Apache License, Version 2.0 (the "License").
 * You may not use this file except in compliance with the License.
 * A copy of the License is located at
 *
 *  https://aws.amazon.com/apache2.0
 *
 * or in the "license" file accompanying this file. This file 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.
 *
 */
                    
                    import org.apache.activemq.ActiveMQConnectionFactory;
                    import org.apache.activemq.jms.pool.PooledConnectionFactory;
                    
                    import javax.jms.*;
                    
                    public class AmazonMQExample {
                    
                    // Specify the connection parameters.
                    private final static String WIRE_LEVEL_ENDPOINT 
                            = "ssl://b-1234a5b6-78cd-901e-2fgh-3i45j6k178l9-1.mq.us-east-2.amazonaws.com:61617";
                    private final static String ACTIVE_MQ_USERNAME = "MyUsername123";
                    private final static String ACTIVE_MQ_PASSWORD = "MyPassword456";
                    
                    public static void main(String[] args) throws JMSException {
                        final ActiveMQConnectionFactory connectionFactory =
                                createActiveMQConnectionFactory();
                        final PooledConnectionFactory pooledConnectionFactory =
                                createPooledConnectionFactory(connectionFactory);
                    
                        sendMessage(pooledConnectionFactory);
                        receiveMessage(connectionFactory);
                    
                        pooledConnectionFactory.stop();
                    }
                    
                    private static void
                    sendMessage(PooledConnectionFactory pooledConnectionFactory) throws JMSException {
                        // Establish a connection for the producer.
                        final Connection producerConnection = pooledConnectionFactory
                                .createConnection();
                        producerConnection.start();
                    
                        // Create a session.
                        final Session producerSession = producerConnection
                                .createSession(false, Session.AUTO_ACKNOWLEDGE);
                    
                        // Create a queue named "MyQueue".
                        final Destination producerDestination = producerSession
                                .createQueue("MyQueue");
                    
                        // Create a producer from the session to the queue.
                        final MessageProducer producer = producerSession
                                .createProducer(producerDestination);
                        producer.setDeliveryMode(DeliveryMode.NON_PERSISTENT);
                    
                        // Create a message.
                        final String text = "Hello from Amazon MQ!";
                        final TextMessage producerMessage = producerSession
                                .createTextMessage(text);
                    
                        // Send the message.
                        producer.send(producerMessage);
                        System.out.println("Message sent.");
                    
                        // Clean up the producer.
                        producer.close();
                        producerSession.close();
                        producerConnection.close();
                    }
                    
                    private static void
                    receiveMessage(ActiveMQConnectionFactory connectionFactory) throws JMSException {
                        // Establish a connection for the consumer.
                        // Note: Consumers should not use PooledConnectionFactory.
                        final Connection consumerConnection = connectionFactory.createConnection();
                        consumerConnection.start();
                    
                        // Create a session.
                        final Session consumerSession = consumerConnection
                                .createSession(false, Session.AUTO_ACKNOWLEDGE);
                    
                        // Create a queue named "MyQueue".
                        final Destination consumerDestination = consumerSession
                                .createQueue("MyQueue");
                    
                        // Create a message consumer from the session to the queue.
                        final MessageConsumer consumer = consumerSession
                                .createConsumer(consumerDestination);
                    
                        // Begin to wait for messages.
                        final Message consumerMessage = consumer.receive(1000);
                    
                        // Receive the message when it arrives.
                        final TextMessage consumerTextMessage = (TextMessage) consumerMessage;
                        System.out.println("Message received: " + consumerTextMessage.getText());
                    
                        // Clean up the consumer.
                        consumer.close();
                        consumerSession.close();
                        consumerConnection.close();
                    }
                    
                    private static PooledConnectionFactory
                    createPooledConnectionFactory(ActiveMQConnectionFactory connectionFactory) {
                        // Create a pooled connection factory.
                        final PooledConnectionFactory pooledConnectionFactory =
                                new PooledConnectionFactory();
                        pooledConnectionFactory.setConnectionFactory(connectionFactory);
                        pooledConnectionFactory.setMaxConnections(10);
                        return pooledConnectionFactory;
                    }
                    
                    private static ActiveMQConnectionFactory createActiveMQConnectionFactory() {
                        // Create a connection factory.
                        final ActiveMQConnectionFactory connectionFactory =
                                new ActiveMQConnectionFactory(WIRE_LEVEL_ENDPOINT);
                    
                        // Pass the sign-in credentials.
                        connectionFactory.setUserName(ACTIVE_MQ_USERNAME);
                        connectionFactory.setPassword(ACTIVE_MQ_PASSWORD);
                        return connectionFactory;
                    }
                    }

/*
 * Copyright 2010-2019 Amazon.com, Inc. or its affiliates. All Rights Reserved.
 *
 * Licensed under the Apache License, Version 2.0 (the "License").
 * You may not use this file except in compliance with the License.
 * A copy of the License is located at
 *
 *  https://aws.amazon.com/apache2.0
 *
 * or in the "license" file accompanying this file. This file 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.
 *
 */
                    
                    import org.eclipse.paho.client.mqttv3.*;
                    
                    public class AmazonMQExampleMqtt implements MqttCallback {
                    
                    // Specify the connection parameters.
                    private final static String WIRE_LEVEL_ENDPOINT =
                            "ssl://b-1234a5b6-78cd-901e-2fgh-3i45j6k178l9-1.mq.us-east-2.amazonaws.com:8883";
                    private final static String ACTIVE_MQ_USERNAME = "MyUsername123";
                    private final static String ACTIVE_MQ_PASSWORD = "MyPassword456";
                    
                    public static void main(String[] args) throws Exception {
                        new AmazonMQExampleMqtt().run();
                    }
                    
                    private void run() throws MqttException, InterruptedException {
                    
                        // Specify the topic name and the message text.
                        final String topic = "myTopic";
                        final String text = "Hello from Amazon MQ!";
                    
                        // Create the MQTT client and specify the connection options.
                        final String clientId = "abc123";
                        final MqttClient client = new MqttClient(WIRE_LEVEL_ENDPOINT, clientId);
                        final MqttConnectOptions connOpts = new MqttConnectOptions();
                    
                        // Pass the sign-in credentials.
                        connOpts.setUserName(ACTIVE_MQ_USERNAME);
                        connOpts.setPassword(ACTIVE_MQ_PASSWORD.toCharArray());
                    
                        // Create a session and subscribe to a topic filter.
                        client.connect(connOpts);
                        client.setCallback(this);
                        client.subscribe("+");
                    
                        // Create a message.
                        final MqttMessage message = new MqttMessage(text.getBytes());
                    
                        // Publish the message to a topic.
                        client.publish(topic, message);
                        System.out.println("Published message.");
                    
                        // Wait for the message to be received.
                        Thread.sleep(3000L);
                    
                        // Clean up the connection.
                        client.disconnect();
                    }
                    
                    @Override
                    public void connectionLost(Throwable cause) {
                        System.out.println("Lost connection.");
                    }
                    
                    @Override
                    public void messageArrived(String topic, MqttMessage message) throws MqttException {
                        System.out.println("Received message from topic " + topic + ": " + message);
                    }
                    
                    @Override
                    public void deliveryComplete(IMqttDeliveryToken token) {
                        System.out.println("Delivered message.");
                    }
                    }     

/*
 * Copyright 2010-2019 Amazon.com, Inc. or its affiliates. All Rights Reserved.
 *
 * Licensed under the Apache License, Version 2.0 (the "License").
 * You may not use this file except in compliance with the License.
 * A copy of the License is located at
 *
 *  https://aws.amazon.com/apache2.0
 *
 * or in the "license" file accompanying this file. This file 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.
 *
 */
                    
                    import org.springframework.messaging.converter.StringMessageConverter;
                    import org.springframework.messaging.simp.stomp.*;
                    import org.springframework.web.socket.WebSocketHttpHeaders;
                    import org.springframework.web.socket.client.WebSocketClient;
                    import org.springframework.web.socket.client.standard.StandardWebSocketClient;
                    import org.springframework.web.socket.messaging.WebSocketStompClient;
                    
                    import java.lang.reflect.Type;
                    
                    public class AmazonMQExampleStompWss {
                    
                    // Specify the connection parameters.
                    private final static String DESTINATION = "/queue";
                    private final static String WIRE_LEVEL_ENDPOINT =
                            "wss://b-1234a5b6-78cd-901e-2fgh-3i45j6k178l9-1.mq.us-east-2.amazonaws.com:61619";
                    private final static String ACTIVE_MQ_USERNAME = "MyUsername123";
                    private final static String ACTIVE_MQ_PASSWORD = "MyPassword456";
                    
                    public static void main(String[] args) throws Exception {
                        final AmazonMQExampleStompWss example = new AmazonMQExampleStompWss();
                    
                        final StompSession stompSession = example.connect();
                        System.out.println("Subscribed to a destination using session.");
                        example.subscribeToDestination(stompSession);
                    
                        System.out.println("Sent message to session.");
                        example.sendMessage(stompSession);
                        Thread.sleep(60000);
                    }
                    
                    private StompSession connect() throws Exception {
                        // Create a client.
                        final WebSocketClient client = new StandardWebSocketClient();
                        final WebSocketStompClient stompClient = new WebSocketStompClient(client);
                        stompClient.setMessageConverter(new StringMessageConverter());
                    
                        final WebSocketHttpHeaders headers = new WebSocketHttpHeaders();
                    
                        // Create headers with authentication parameters.
                        final StompHeaders head = new StompHeaders();
                        head.add(StompHeaders.LOGIN, ACTIVE_MQ_USERNAME);
                        head.add(StompHeaders.PASSCODE, ACTIVE_MQ_PASSWORD);
                    
                        final StompSessionHandler sessionHandler = new MySessionHandler();
                    
                        // Create a connection.
                        return stompClient.connect(WIRE_LEVEL_ENDPOINT, headers, head,
                                sessionHandler).get();
                    }
                    
                    private void subscribeToDestination(final StompSession stompSession) {
                        stompSession.subscribe(DESTINATION, new MyFrameHandler());
                    }
                    
                    private void sendMessage(final StompSession stompSession) {
                        stompSession.send(DESTINATION, "Hello from Amazon MQ!".getBytes());
                    }
                    
                    private static class MySessionHandler extends StompSessionHandlerAdapter {
                        public void afterConnected(final StompSession stompSession,
                                                final StompHeaders stompHeaders) {
                            System.out.println("Connected to broker.");
                        }
                    }
                    
                    private static class MyFrameHandler implements StompFrameHandler {
                        public Type getPayloadType(final StompHeaders headers) {
                            return String.class;
                        }
                    
                        public void handleFrame(final StompHeaders stompHeaders,
                                                final Object message) {
                            System.out.print("Received message from topic: " + message);
                        }
                    }
                    }