Example usage for com.rabbitmq.client Connection createChannel

Introduction

In this page you can find the example usage for com.rabbitmq.client Connection createChannel.

Prototype

Channel createChannel() throws IOException;

Source Link

Document

Create a new channel, using an internally allocated channel number.

Usage

From source file:org.hobbit.core.rabbit.RabbitRpcClient.java

License:Open Source License

/**
 * Initializes the client by declaring a request queue using the given
 * connection and queue name as well as a second queue and a consumer for
 * retrieving responses./*from w w w .  j ava 2s .c  o m*/
 *
 * @param connection
 *            the RabbitMQ connection that is used for creating queues
 * @param requestQueueName
 *            the name of the queue
 * @throws IOException
 *             if a communication problem during the creation of the
 *             channel, the queue or the internal consumer occurs
 */
protected void init(Connection connection, String requestQueueName) throws IOException {
    Channel tempChannel = connection.createChannel();
    tempChannel.queueDeclare(requestQueueName, false, false, true, null);
    requestQueue = new RabbitQueue(tempChannel, requestQueueName);
    tempChannel = connection.createChannel();
    responseQueue = new RabbitQueue(tempChannel, tempChannel.queueDeclare().getQueue());
    responseQueue.channel.basicQos(1);
    RabbitRpcClientConsumer consumer = new RabbitRpcClientConsumer(responseQueue.channel, this);
    responseQueue.channel.basicConsume(responseQueue.name, true, consumer);
}

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From source file:org.hp.samples.ProcessMessage.java

License:Open Source License

protected void doPost(HttpServletRequest request, HttpServletResponse response)
        throws ServletException, IOException {
    response.setContentType("text/plain");
    response.setStatus(200);/*w w  w  .j a  v a 2  s  .com*/
    PrintWriter writer = response.getWriter();
    writer.println("Here's your message:");

    // Pull out the RABBITMQ_URL environment variable
    String uri = System.getenv("RABBITMQ_URL");

    ConnectionFactory factory = new ConnectionFactory();
    try {
        factory.setUri(uri);
    } catch (KeyManagementException e) {
        e.printStackTrace();
    } catch (NoSuchAlgorithmException e) {
        e.printStackTrace();
    } catch (URISyntaxException e) {
        e.printStackTrace();
    }

    Connection connection = factory.newConnection();
    Channel channel = connection.createChannel();

    // Create the queue
    channel.queueDeclare("hello", false, false, false, null);

    String routingKey = "thekey";
    String exchangeName = "exchange";

    // Declare an exchange and bind it to the queue
    channel.exchangeDeclare(exchangeName, "direct", true);
    channel.queueBind("hello", exchangeName, routingKey);

    // Grab the message from the HTML form and publish it to the queue
    String message = request.getParameter("message");
    channel.basicPublish(exchangeName, routingKey, null, message.getBytes());
    writer.println(" Message sent to queue '" + message + "'");

    boolean autoAck = false;

    // Get the response message
    GetResponse responseMsg = channel.basicGet("hello", autoAck);

    if (responseMsg == null) {
        // No message retrieved.
    } else {
        byte[] body = responseMsg.getBody();
        // Since getBody() returns a byte array, convert to a string for
        // the user.
        String bodyString = new String(body);
        long deliveryTag = responseMsg.getEnvelope().getDeliveryTag();

        writer.println("Message received: " + bodyString);

        // Acknowledge that we received the message so that the queue
        // removes the message so that it's not sent to us again.
        channel.basicAck(deliveryTag, false);
    }

    writer.close();
}

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From source file:org.hp.samples.RabbitServlet.java

License:Open Source License

protected void doGet(HttpServletRequest request, HttpServletResponse response)
        throws ServletException, IOException {
    response.setContentType("text/html");
    response.setStatus(200);/*from w  ww .  j  ava 2  s.  c o  m*/

    PrintWriter writer = response.getWriter();

    // Create an HTML form for the user to input a message for the queue
    String docType = "<!doctype html public \"-//w3c//dtd html 4.0 " + "transitional//en\">\n";
    writer.println(docType + "<html>" + "<body>" + "<p>RabbitMQ for Java</p>"
            + "<form action='ProcessMessage' method='post'>"
            + "Message to send: <input type='text' name='message'><br>"
            + "<input type='submit' value='Send Message'>" + "</form>" + "</body>" + "</html>");

    String uri = System.getenv("RABBITMQ_URL");

    ConnectionFactory factory = new ConnectionFactory();
    try {
        factory.setUri(uri);
    } catch (KeyManagementException e) {
        e.printStackTrace();
    } catch (NoSuchAlgorithmException e) {
        e.printStackTrace();
    } catch (URISyntaxException e) {
        e.printStackTrace();
    }
    Connection connection = factory.newConnection();
    Channel channel = connection.createChannel();

    channel.queueDeclare("hello", false, false, false, null);

    writer.close();
}

---

From source file:org.mazerunner.core.messaging.Worker.java

License:Apache License

public void doMain(String[] args) throws Exception {

    CmdLineParser parser = new CmdLineParser(this);

    // if you have a wider console, you could increase the value;
    // here 80 is also the default
    parser.setUsageWidth(80);//  w ww  . j av  a2s  .  com

    try {
        // parse the arguments.
        parser.parseArgument(args);

        if (sparkMaster == "" || hadoopHdfs == "")
            throw new CmdLineException(parser, "Options required: --hadoop.hdfs <url>, --spark.master <url>");

        ConfigurationLoader.getInstance().setHadoopHdfsUri(hadoopHdfs);
        ConfigurationLoader.getInstance().setSparkHost(sparkMaster);
        ConfigurationLoader.getInstance().setAppName(sparkAppName);
        ConfigurationLoader.getInstance().setExecutorMemory(sparkExecutorMemory);
        ConfigurationLoader.getInstance().setDriverHost(driverHost);
        ConfigurationLoader.getInstance().setRabbitmqNodename(rabbitMqHost);

    } catch (CmdLineException e) {
        // if there's a problem in the command line,
        // you'll get this exception. this will report
        // an error message.
        System.err.println(e.getMessage());
        System.err.println("java -cp $CLASSPATH [<spark-config-options>] <main-class> [<mazerunner-args>]");
        // print the list of available options
        parser.printUsage(System.err);
        System.err.println();

        // print option sample. This is useful some time
        System.err.println("  Example: java -cp $CLASSPATH org.mazerunner.core.messaging.Worker"
                + parser.printExample(ALL));

        return;
    }

    ConnectionFactory factory = new ConnectionFactory();
    factory.setHost(ConfigurationLoader.getInstance().getRabbitmqNodename());
    Connection connection = factory.newConnection();
    Channel channel = connection.createChannel();

    channel.queueDeclare(TASK_QUEUE_NAME, true, false, false, null);

    channel.basicQos(20);

    // Initialize spark context
    GraphProcessor.initializeSparkContext();

    QueueingConsumer consumer = new QueueingConsumer(channel);
    channel.basicConsume(TASK_QUEUE_NAME, false, consumer);

    System.out.println(" [*] Waiting for messages. To exit press CTRL+C");

    while (true) {
        QueueingConsumer.Delivery delivery = consumer.nextDelivery();
        String message = new String(delivery.getBody());

        System.out.println(" [x] Received '" + message + "'");

        // Deserialize message
        Gson gson = new Gson();
        ProcessorMessage processorMessage = gson.fromJson(message, ProcessorMessage.class);

        // Run PageRank
        GraphProcessor.processEdgeList(processorMessage);

        System.out.println(" [x] Done '" + message + "'");
        channel.basicAck(delivery.getEnvelope().getDeliveryTag(), false);
    }
}

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From source file:org.muzza.rabbit.RabbitConfig.java

public static Channel getChannel(Connection connection) throws IOException {
    Channel channel = connection.createChannel();

    channel.queueDeclare(Constants.QUEUE, false, false, false, null);

    return channel;
}

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From source file:org.ninjav.rabbitmq.SendTest.java

@Test
public void canSendMessageToQueue() throws IOException, TimeoutException {

    ConnectionFactory factory = new ConnectionFactory();
    factory.setHost("localhost");
    Connection connection = factory.newConnection();
    Channel channel = connection.createChannel();
    channel.queueDeclare(QUEUE_NAME, false, false, false, null);

    for (int i = 0; i < 1000000; i++) {
        String message = "Hello world " + i;
        channel.basicPublish("", QUEUE_NAME, null, message.getBytes());
    }//from   ww  w . j  a v  a 2s  . c om

    channel.close();
    connection.close();
}

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From source file:org.ninjav.rabbitmq.TestReceive.java

@Test
public void canReceiveMessageFromQueue() throws IOException, TimeoutException {

    ConnectionFactory factory = new ConnectionFactory();
    factory.setHost("localhost");
    Connection connection = factory.newConnection();
    Channel channel = connection.createChannel();
    channel.queueDeclare(QUEUE_NAME, false, false, false, null);

    Consumer consumer;/*from w  w w  .  java2s  .c om*/
    consumer = new DefaultConsumer(channel) {
        @Override
        public void handleDelivery(String consumerTag, Envelope envelope, AMQP.BasicProperties properties,
                byte[] body) throws IOException {
            try {
                String message = new String(body, "UTF-8");
                System.out.println("Message Received: " + message);
            } finally {
                channel.basicAck(envelope.getDeliveryTag(), false);
            }
        }
    };
    boolean autoAck = false;
    channel.basicConsume(QUEUE_NAME, autoAck, consumer);

    try {
        Thread.sleep(100000);
    } catch (InterruptedException ex) {
        Logger.getLogger(TestReceive.class.getName()).log(Level.SEVERE, null, ex);
    }
}

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From source file:org.openbaton.common.vnfm_sdk.amqp.AbstractVnfmSpringAmqp.java

License:Apache License

@Override
protected void unregister() {
    try {/*from  w w w.java 2s  .  c o  m*/
        ((VnfmSpringHelperRabbit) vnfmHelper).sendMessageToQueue(RabbitConfiguration.queueName_vnfmUnregister,
                vnfmManagerEndpoint);
    } catch (IllegalStateException e) {
        log.warn("Got exception while unregistering trying to do it manually");
        ConnectionFactory factory = new ConnectionFactory();

        factory.setHost(rabbitHost);
        Connection connection = null;
        try {
            connection = factory.newConnection();

            Channel channel = connection.createChannel();

            String message = gson.toJson(vnfmManagerEndpoint);
            channel.basicPublish("openbaton-exchange", RabbitConfiguration.queueName_vnfmUnregister,
                    MessageProperties.TEXT_PLAIN, message.getBytes("UTF-8"));
            log.debug("Sent '" + message + "'");

            channel.close();
            connection.close();
        } catch (IOException e1) {
            e1.printStackTrace();
        }
    }
}

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From source file:org.opendaylight.federationmessagequeue.impl.RabbitMessageBus.java

License:Open Source License

@Override
public boolean createQueue(String queueName, String mqBrokerIp, int mqPortNumber, String mqUser,
        String mqUserPwd) {//from   ww  w  .  j av  a 2 s. c  o  m
    LOG.info("Creating connection for queue {} on broker {}", queueName, mqBrokerIp);

    ConnectionFactory factory = new ConnectionFactory();
    factory.setHost(mqBrokerIp);
    factory.setPort(mqPortNumber);
    factory.setUsername(mqUser);
    factory.setPassword(mqUserPwd);
    factory.setAutomaticRecoveryEnabled(true);

    try {
        Connection connection = factory.newConnection();
        LOG.info("Created connection to broker {}:{} for user {} ", mqBrokerIp, mqPortNumber, mqUser);
        Channel channel = connection.createChannel();
        channel.queueDeclare(queueName, false, false, false, null);
        LOG.info("Declared queue {} on broker {}", queueName, mqBrokerIp);
        MessageBusConnectionData mbcd = new MessageBusConnectionData(mqBrokerIp, connection, channel);
        queueNameToConnectionData.put(queueName, mbcd);
        return true;
    } catch (IOException | TimeoutException e) {
        LOG.warn("Failed creating queue {} on broker {}:{} for user {} because: {}", queueName, mqBrokerIp,
                mqPortNumber, mqUser, e.getMessage());
        return false;
    }
}

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From source file:org.openmrs.module.amqpmodule.utils.impl.PublisherServiceImpl.java

License:Open Source License

@Override
public boolean PublisherCreateConnection() throws java.io.IOException {

    ConnectionFactory factory = new ConnectionFactory();
    factory.setHost("192.168.43.123");
    factory.setPort(5672);// ww  w . j  a  v  a 2 s. com
    factory.setUsername("chs");
    factory.setPassword("chs123");
    Connection connection = null;
    try {
        connection = factory.newConnection();
        Channel channel = connection.createChannel();

        channel.exchangeDeclare(EXCHANGE_NAME, "direct", true);

        channel.basicPublish(EXCHANGE_NAME, topic, MessageProperties.PERSISTENT_TEXT_PLAIN, msg.getBytes());
        System.out.println(" [x] Sent '" + msg + "'");

        channel.close();

    } catch (TimeoutException e) {
        System.out.println("Connection Timed out");
        e.printStackTrace();
    }

    connection.close();

    return true;
}

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