Example usage for com.rabbitmq.client Channel basicConsume

Introduction

In this page you can find the example usage for com.rabbitmq.client Channel basicConsume.

Prototype

String basicConsume(String queue, boolean autoAck, Consumer callback) throws IOException;

Source Link

Document

Start a non-nolocal, non-exclusive consumer, with a server-generated consumerTag.

Usage

From source file:com.es.dashboard.ConnectionBrokerJPA.java

@PostConstruct
public void init() {
    bigBaite = new LinkedList<>();
    readings = new ArrayList<Reading>();
    ConnectionFactory factory = new ConnectionFactory();
    factory.setHost("systembus"); // RabbitMQ IP
    Connection connection = null;
    try {/*from   w  ww.  ja  va  2  s .co  m*/
        connection = factory.newConnection();
    } catch (IOException ex) {
        logger.error(ex);
    } catch (TimeoutException ex) {
        logger.error(ex);
    }
    Channel channel = null;
    try {
        channel = connection.createChannel();
    } catch (IOException ex) {
        logger.error(ex);
    }

    try {
        channel.exchangeDeclare("sensors", "topic"); // sensors is the name of the exchange
    } catch (IOException ex) {
        logger.error(ex);
    }
    AMQP.Queue.DeclareOk result = null;
    try {
        result = channel.queueDeclare("", false, true, false, null);
    } catch (IOException ex) {
        logger.error(ex);
    }
    String queuename = result.getQueue();
    try {
        channel.queueBind(queuename, "sensors", "dashboard.response"); // Binding key is #, this will consume all messages
    } catch (IOException ex) {
        logger.error(ex);
    }

    logger.info(" [*] Waiting for messages. To exit press CTRL+C");

    Consumer consumer = new DefaultConsumer(channel) {
        @Override
        public void handleDelivery(String consumerTag, Envelope envelope, AMQP.BasicProperties properties,
                byte[] body) throws IOException {
            String message = new String(body, "UTF-8");

            EventBus eventBus = EventBusFactory.getDefault().eventBus();
            Gson gson = new Gson();
            Type type = new TypeToken<Map<String, String>>() {
            }.getType();
            Map<String, String> myMap = gson.fromJson(message, type);
            if (envelope.getRoutingKey().equals("realtime.alarms")) {
                eventBus.publish("/jpa", message);
                return;
            }
            System.out.println(envelope.getRoutingKey());
            logger.info(envelope.getRoutingKey());

            //readings.add(new Reading(new Date(Long.parseLong(myMap.get("timestamp"))), myMap.get("value"), myMap.get("name"), myMap.get("room")));
            //System.out.println("publishing " + msg_to_publish);
            eventBus.publish("/jpa", message);
            //System.out.println("published");

        }
    };
    try {
        //RequestContext.getCurrentInstance().execute("function rpt() {$(\".qualquer\").first().trigger(\"click\")}"
        //        + "var timeoutdummy = window.setInterval(rpt,2000);");
        channel.basicConsume(queuename, true, consumer);
    } catch (IOException ex) {
        ex.printStackTrace();
        logger.error(ex);
    }

}

---

From source file:com.espertech.esperio.amqp.AMQPSupportReceiveRunnable.java

License:Open Source License

public void run() {
    try {//ww  w.j a  v  a  2s  . c  o m
        ConnectionFactory factory = new ConnectionFactory();
        factory.setHost(hostName);
        Connection connection = factory.newConnection();
        Channel channel = connection.createChannel();

        // java.lang.String queue, boolean durable, boolean exclusive, boolean autoDelete, java.util.Map<java.lang.String,java.lang.Object> arguments
        channel.queueDeclare(queueName, false, false, true, null);

        log.info("Start receiving messages");

        QueueingConsumer consumer = new QueueingConsumer(channel);
        channel.basicConsume(queueName, true, consumer);

        int count = 0;
        while (true) {
            final QueueingConsumer.Delivery msg = consumer.nextDelivery(waitMSecNextMsg);
            if (msg == null) {
                continue;
            }
            final byte[] bytes = msg.getBody();
            callback.handleMessage(bytes);

            if (isShutdown()) {
                break;
            }
        }

        log.info("Completed publishing messages: " + count + " messages");
    } catch (Exception ex) {
        log.error("Error attaching to AMQP: " + ex.getMessage(), ex);
    }
}

---

From source file:com.espertech.esperio.amqp.AMQPSupportUtil.java

License:Open Source License

public static int drainQueue(String hostName, String queueName) {
    Connection connection = null;
    Channel channel = null;

    try {//from  ww  w .  ja v a 2s. c o  m
        ConnectionFactory factory = new ConnectionFactory();
        factory.setHost(hostName);
        connection = factory.newConnection();
        channel = connection.createChannel();

        // java.lang.String queue, boolean durable, boolean exclusive, boolean autoDelete, java.util.Map<java.lang.String,java.lang.Object> arguments
        channel.queueDeclare(queueName, false, false, true, null);

        QueueingConsumer consumer = new QueueingConsumer(channel);
        channel.basicConsume(queueName, true, consumer);

        int count = 0;
        while (true) {
            final QueueingConsumer.Delivery msg = consumer.nextDelivery(1);
            if (msg == null) {
                return count;
            }
        }
    } catch (Exception ex) {
        log.error("Error attaching to AMQP: " + ex.getMessage(), ex);
    } finally {
        if (channel != null) {
            try {
                channel.close();
            } catch (IOException e) {
                e.printStackTrace();
            }
        }
        if (connection != null) {
            try {
                connection.close();
            } catch (IOException e) {
                e.printStackTrace();
            }
        }
    }
    return -1;
}

---

From source file:com.eventbook.controller.SpringbootPocController.java

@RequestMapping(value = "/rabbitMQReceiveTest", method = RequestMethod.GET)
public String rabbitMQReceiveTest() {
    try {/*w w  w  .  j ava2  s  .  c  om*/
        ConnectionFactory factory = new ConnectionFactory();
        factory.setHost("rabbitmq");
        factory.setPort(5672);
        Connection connection = factory.newConnection();
        Channel channel = connection.createChannel();
        channel.queueDeclare(QUEUE_NAME, false, false, false, null);
        System.out.println(" [*] Waiting for messages. To exit press CTRL+C");
        Consumer consumer = new DefaultConsumer(channel) {
            @Override
            public void handleDelivery(String consumerTag, Envelope envelope, AMQP.BasicProperties properties,
                    byte[] body) throws IOException {
                String message = new String(body, "UTF-8");
                System.out.println(" [x] Received '" + message + "'");
            }
        };
        channel.basicConsume(QUEUE_NAME, true, consumer);

    } catch (IOException | TimeoutException ex) {
        Logger.getLogger(SpringbootPocController.class.getName()).log(Level.SEVERE, null, ex);
    }

    return "Getting messages from RabbitMQ!!";
}

---

From source file:com.frannciscocabral.ufs.rabbitmq.Receiver.java

public static void main(String[] argv)
        throws java.io.IOException, java.lang.InterruptedException, TimeoutException {

    ConnectionFactory factory = new ConnectionFactory();
    factory.setHost("localhost");
    Connection connection = factory.newConnection();
    Channel channel = connection.createChannel();

    channel.queueDeclare(QUEUE_NAME, false, false, false, null);
    System.out.println(" [*] Waiting for messages. To exit press CTRL+C");

    Consumer consumer = new DefaultConsumer(channel) {
        @Override// w ww  .  j  av  a2 s.  c o m
        public void handleDelivery(String consumerTag, Envelope envelope, AMQP.BasicProperties properties,
                byte[] body) throws IOException {
            String message = new String(body, "UTF-8");
            System.out.println(" [x] Received '" + message + "'");
        }
    };
    channel.basicConsume(QUEUE_NAME, true, consumer);
}

---

From source file:com.gemini.provision.network.main.GeminiNetworkProvisionMain.java

public static void main(String[] args) {

    //activate logging level if it is DEBUG, default is INFO so no need for any
    //action if it is otherwise
    Injector propInjector = Guice.createInjector(new GeminiPropertiesModule());
    GeminiProperties properties = propInjector.getInstance(GeminiProperties.class);
    if (properties.getProperties().getProperty("LOGGING_LEVEL").equals("DEBUG")) {
        Configurator.defaultConfig().level(Level.DEBUG).activate();
    }//w  ww. j a  v  a2  s .  c  o m

    //inject the mapper as it will be used in all the threads
    Injector mapperInjector = Guice.createInjector(new GeminiMapperModule());
    mapper = mapperInjector.getInstance(GeminiMapper.class);

    //the app.yml to deployment.yml converter
    Thread yamlConverterThread = new Thread(() -> {
        //setup the message receiver
        final Connection connection;
        final Channel channel;
        final QueueingConsumer consumer;

        ConnectionFactory factory = new ConnectionFactory();
        factory.setHost(properties.getProperties().getProperty("MESSAGING_HOST"));
        String queueName = null;
        try {
            connection = factory.newConnection();
            channel = connection.createChannel();
            channel.exchangeDeclare(properties.getProperties().getProperty("EXCHANGE_NAME"), "topic");
            queueName = channel.queueDeclare().getQueue();
            channel.queueBind(queueName, properties.getProperties().getProperty("EXCHANGE_NAME"),
                    properties.getProperties().getProperty("YAML_MAPPER_TOPIC"));
            consumer = new QueueingConsumer(channel);
            channel.basicConsume(queueName, true, consumer);
        } catch (IOException | NullPointerException | NumberFormatException ex) {
            Logger.error("Fatal Error: YAML Mapper - could not connect to messaging system. Exception: {}", ex);
            return;
        }

        QueueingConsumer.Delivery delivery = null;
        while (true) {
            try {
                delivery = consumer.nextDelivery();
            } catch (InterruptedException | ShutdownSignalException | ConsumerCancelledException ex) {
                Logger.error("Fatal Error: YAML Mapper - could not retrieve message. Exception: {}", ex);
                continue;
            }

            String routingKey = delivery.getEnvelope().getRoutingKey();
            String jsonBody = new String(delivery.getBody());

            //TODO: NEED TO PUT THE MESSAGE BACK IN THE QUEUE IF THERE IS A FAILURE
            Integer status = 0;
            if (routingKey.equals(properties.getProperties().getProperty("YAML_MAPPER_MAP_APP"))) {
                status = mapApptoDeployment(jsonBody);
            } else {
                continue;
            }

            if (status == 0) {
                try {
                    channel.basicAck(delivery.getEnvelope().getDeliveryTag(), false);
                } catch (IOException ex) {
                    Logger.error("Could not ack message. Exception: {}", ex);
                }
            } else {
                //failed so requeue the message
                try {
                    channel.basicNack(delivery.getEnvelope().getDeliveryTag(), false, true);
                } catch (IOException ex) {
                    Logger.error("Could not nack message. Exception: {}", ex);
                }
            }
        }
    });
    yamlConverterThread.start();

    //the networking message recevier
    Thread networkingThread = new Thread(() -> {
        //setup the message receiver
        final Connection connection;
        final Channel channel;
        final QueueingConsumer consumer;

        ConnectionFactory factory = new ConnectionFactory();
        factory.setHost(properties.getProperties().getProperty("MESSAGING_HOST"));
        String queueName = null;
        try {
            connection = factory.newConnection();
            channel = connection.createChannel();
            channel.exchangeDeclare(properties.getProperties().getProperty("EXCHANGE_NAME"), "topic");
            queueName = channel.queueDeclare().getQueue();
            channel.queueBind(queueName, properties.getProperties().getProperty("EXCHANGE_NAME"),
                    properties.getProperties().getProperty("NETWORK_TOPIC"));
            //                channel.basicQos(Integer.parseUnsignedInt(properties.getProperties().getProperty("PREFETCH_COUNT")));
            consumer = new QueueingConsumer(channel);
            channel.basicConsume(queueName, true, consumer);
        } catch (IOException | NullPointerException | NumberFormatException ex) {
            Logger.error("Fatal Error: could not connect to messaging system. Exception: {}", ex);
            return;
        }

        QueueingConsumer.Delivery delivery = null;
        while (true) {
            try {
                delivery = consumer.nextDelivery();
            } catch (InterruptedException | ShutdownSignalException | ConsumerCancelledException ex) {
                Logger.error("Could not get message from queue. Exception: {}", ex);

                //TODO: NEED TO PUT THE MESSAGE BACK IN THE QUEUE
                continue;
            }

            String routingKey = delivery.getEnvelope().getRoutingKey();
            String jsonBody = new String(delivery.getBody());

            //TODO: NEED TO PUT THE MESSAGE BACK IN THE QUEUE IF THERE IS A FAILURE
            if (routingKey.equals(properties.getProperties().getProperty("NETWORK_TASK_CREATE"))) {
                createNetwork(jsonBody);
            } else if (routingKey.equals(properties.getProperties().getProperty("NETWORK_TASK_UPDATE"))) {
                updateNetwork(jsonBody);
            } else if (routingKey.equals(properties.getProperties().getProperty("NETWORK_TASK_DELETE"))) {
                deleteNetwork(jsonBody);
            } else if (routingKey.equals(properties.getProperties().getProperty("SUBNET_TASK_CREATE"))) {
                createSubnet(jsonBody);
            } else if (routingKey.equals(properties.getProperties().getProperty("SUBNET_TASK_UPDATE"))) {
                updateSubnet(jsonBody);
            } else if (routingKey.equals(properties.getProperties().getProperty("SUBNET_TASK_DELETE"))) {
                deleteSubnet(jsonBody);
            } else if (routingKey.equals(properties.getProperties().getProperty("ROUTER_TASK_CREATE"))) {
                createRouter(jsonBody);
            } else if (routingKey.equals(properties.getProperties().getProperty("ROUTER_TASK_UPDATE"))) {
                updateRouter(jsonBody);
            } else if (routingKey.equals(properties.getProperties().getProperty("ROUTER_TASK_DELETE"))) {
                deleteRouter(jsonBody);
            }

            try {
                channel.basicAck(delivery.getEnvelope().getDeliveryTag(), false);
            } catch (IOException ex) {
                Logger.error("Could not ack message. Exception: {}", ex);
            }
        }
    });
    networkingThread.start();

    //the load balancer 
    Thread lbThread = new Thread(() -> {
    });

    lbThread.start();

    //the security thread
    Thread securityThread = new Thread(() -> {
        //setup the message receiver
        final Connection connection;
        final Channel channel;
        final QueueingConsumer consumer;

        ConnectionFactory factory = new ConnectionFactory();
        factory.setHost(properties.getProperties().getProperty("MESSAGING_HOST"));
        String queueName = null;
        try {
            connection = factory.newConnection();
            channel = connection.createChannel();
            channel.exchangeDeclare(properties.getProperties().getProperty("EXCHANGE_NAME"), "topic");
            queueName = channel.queueDeclare().getQueue();
            channel.queueBind(queueName, properties.getProperties().getProperty("EXCHANGE_NAME"),
                    properties.getProperties().getProperty("SECURITY_TOPIC"));
            //                channel.basicQos(Integer.parseUnsignedInt(properties.getProperties().getProperty("PREFETCH_COUNT")));
            consumer = new QueueingConsumer(channel);
            channel.basicConsume(queueName, true, consumer);
        } catch (IOException | NullPointerException | NumberFormatException ex) {
            Logger.error("Fatal Error: could not connect to messaging system. Exception: {}", ex);
            return;
        }

        QueueingConsumer.Delivery delivery = null;
        while (true) {
            try {
                delivery = consumer.nextDelivery();
            } catch (InterruptedException | ShutdownSignalException | ConsumerCancelledException ex) {
                Logger.error("Could not get message from queue. Exception: {}", ex);
                continue;
            }

            String routingKey = delivery.getEnvelope().getRoutingKey();
            String jsonBody = new String(delivery.getBody());

            //TODO: NEED TO PUT THE MESSAGE BACK IN THE QUEUE IF THERE IS A FAILURE
            if (routingKey.equals(properties.getProperties().getProperty("SECURITY_TASK_SG_CREATE"))) {
                createSecurityGroup(jsonBody);
            } else if (routingKey.equals(properties.getProperties().getProperty("SECURITY_TASK_SG_UPDATE"))) {
                updateSecurityGroup(jsonBody);
            } else if (routingKey.equals(properties.getProperties().getProperty("SECURITY_TASK_SG_DELETE"))) {
                deleteSecurityGroup(jsonBody);
            } else if (routingKey
                    .equals(properties.getProperties().getProperty("SECURITY_TASK_SG_RULE_CREATE"))) {
                createSecurityGroupRule(jsonBody);
            } else if (routingKey
                    .equals(properties.getProperties().getProperty("SECURITY_TASK_SG_RULE_UPDATE"))) {
                updateSecurityGroupRule(jsonBody);
            } else if (routingKey
                    .equals(properties.getProperties().getProperty("SECURITY_TASK_SG_RULE_DELETE"))) {
                deleteSecurityGroupRule(jsonBody);
            }

            try {
                channel.basicAck(delivery.getEnvelope().getDeliveryTag(), false);
            } catch (IOException ex) {
                Logger.error("Could not ack message. Exception: {}", ex);
            }
        }
    });
    securityThread.start();
}

---

From source file:com.github.dann.wspusher.pubsub.subscriber.impl.RabbitMQSubscriberImpl.java

License:Apache License

@Override
public void subscribe(String exchange, DataPusherWebSocket webSocket) {
    Connection connection = null;
    Channel channel = null;

    try {/*from  w  w  w. jav  a2s .co  m*/
        // FIXME Cache connection!
        ConnectionFactory factory = new ConnectionFactory();
        connection = factory.newConnection();
        channel = connection.createChannel();

        channel.exchangeDeclare(exchange, DEFAULT_EXCHANGE_TYPE);
        String queueName = channel.queueDeclare().getQueue();
        channel.queueBind(queueName, exchange, "");
        QueueingConsumer consumer = new QueueingConsumer(channel);
        channel.basicConsume(queueName, true, consumer);

        doWork(consumer, webSocket);

    } catch (Exception e) {
        logger.error("Error occured", e);
        throw new WsRuntimeException(e);

    } finally {
        RabbitMQResourceUtils.closeQuietly(channel);
        RabbitMQResourceUtils.closeQuietly(connection);
    }

}

---

From source file:com.github.hexsmith.rabbitmq.consumer.MessageConsumer.java

License:Open Source License

public boolean consume(String queueName) {
    //RabbitMQ/*from   w w  w.j  a va 2 s .com*/
    ConnectionFactory factory = new ConnectionFactory();
    factory.setHost("127.0.0.1");
    Connection connection = null;
    Channel channel = null;
    try {
        connection = factory.newConnection();
        channel = connection.createChannel();
        //queue??queue
        //?queueDeclare???queue
        channel.queueDeclare(queueName, false, false, false, null);

        //?DefaultConsumerhandleDelivery???getByte()???String
        Consumer consumer = new DefaultConsumer(channel) {
            @Override
            public void handleDelivery(String consumerTag, Envelope envelope, AMQP.BasicProperties properties,
                    byte[] body) throws IOException {
                String message = new String(body, "UTF-8");
                logger.info("Received '" + message + "'");
            }
        };
        //??
        channel.basicConsume(queueName, true, consumer);

        //???rabbitMQ

    } catch (IOException | TimeoutException e) {
        //?false
        logger.error("send message failed!", e);
        return false;
    }

    return true;
}

---

From source file:com.github.hexsmith.rabbitmq.consumer.MultiMessageConsumer.java

License:Open Source License

public boolean consume(String queueName, String consumerName) {
    //RabbitMQ/*from  ww  w.  j a va  2  s.  c o m*/
    ConnectionFactory factory = new ConnectionFactory();
    factory.setHost("127.0.0.1");
    Connection connection = null;
    Channel channel = null;
    try {
        connection = factory.newConnection();
        channel = connection.createChannel();
        //queue??queue
        //?queueDeclare???queue
        channel.queueDeclare(queueName, false, false, false, null);

        //?DefaultConsumerhandleDelivery???getByte()???String
        Consumer consumer = new DefaultConsumer(channel) {
            @Override
            public void handleDelivery(String consumerTag, Envelope envelope, AMQP.BasicProperties properties,
                    byte[] body) throws IOException {
                String message = new String(body, "UTF-8");
                logger.info("[{}]" + "Received '" + message + "'", consumerName);
            }
        };
        //??
        channel.basicConsume(queueName, true, consumer);

        //???rabbitMQ

    } catch (IOException | TimeoutException e) {
        //?false
        logger.error("send message failed!", e);
        return false;
    }

    return true;
}

---

From source file:com.github.liyp.rabbitmq.rpc.RPCServer.java

License:Apache License

public static void main(String[] argv) {
    Connection connection = null;
    Channel channel = null;
    try {/*from  w ww  . j a  v a  2 s  . c o m*/
        ConnectionFactory factory = new ConnectionFactory();
        factory.setHost("localhost");

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

        channel.queueDeclare(RPC_QUEUE_NAME, false, false, false, null);

        channel.basicQos(1);

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

        System.out.println(" [x] Awaiting RPC requests");

        while (true) {
            String response = null;

            QueueingConsumer.Delivery delivery = consumer.nextDelivery();

            BasicProperties props = delivery.getProperties();
            BasicProperties replyProps = new BasicProperties.Builder().correlationId(props.getCorrelationId())
                    .build();

            try {
                String message = new String(delivery.getBody(), "UTF-8");
                int n = Integer.parseInt(message);

                System.out.println(" [.] fib(" + message + ")");
                response = "" + fib(n);
            } catch (Exception e) {
                System.out.println(" [.] " + e.toString());
                response = "";
            } finally {
                channel.basicPublish("", props.getReplyTo(), replyProps, response.getBytes("UTF-8"));

                channel.basicAck(delivery.getEnvelope().getDeliveryTag(), false);
            }
        }
    } catch (Exception e) {
        e.printStackTrace();
    } finally {
        if (connection != null) {
            try {
                connection.close();
            } catch (Exception ignore) {
            }
        }
    }
}

---

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