Example usage for com.rabbitmq.client Channel basicAck

Introduction

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

Prototype

void basicAck(long deliveryTag, boolean multiple) throws IOException;

Source Link

Document

Acknowledge one or several received messages.

Usage

From source file:cs.rsa.ts14dist.appserver.RabbitMQDaemon.java

License:Apache License

@Override
public void run() {

    Connection connection = null;
    Channel channel = null;
    try {/*from w w w .ja  v  a  2 s . c o  m*/
        ConnectionFactory factory = new ConnectionFactory();
        logger.info("Starting RabbitMQDaemon, MQ IP = " + hostname);
        factory.setHost(hostname);

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

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

        channel.basicQos(1);

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

        while (true) {
            String response = null;

            // Block and fetch next msg from queue
            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");
                logger.trace("Received msg: " + message);

                // Convert the message to a JSON request object
                JSONObject request = (JSONObject) JSONValue.parse(message);

                // Delegate to the server request handler for handling the
                // request and computing an answer
                JSONObject reply = serverRequestHandler.handleRequest(request);

                // Convert the answer back into a string for replying to
                // client
                response = reply.toJSONString();
            } catch (Exception e) {
                logger.error(" Exception in MQDAemon run()/while true] " + e.toString());
                response = "wrong";
            } finally {
                logger.trace("Returning answer: " + response);
                channel.basicPublish("", props.getReplyTo(), replyProps, response.getBytes("UTF-8"));
                channel.basicAck(delivery.getEnvelope().getDeliveryTag(), false);
                logger.trace("Answer acknowledged.");
            }
        }
    } catch (Exception e) {
        logger.error("Exception in daemon's outer loop: nested exception" + e.getMessage());
        e.printStackTrace();
    } finally {
        if (connection != null) {
            try {
                connection.close();
            } catch (Exception ignore) {
            }
        }
    }
}

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From source file:cu.uci.uengine.amqp.SubmitsListener.java

@Override
public void onMessage(Message message, Channel channel) throws Exception {

    message.getMessageProperties().setHeader("__TypeId__", "cu.uci.uengine.model.dto.SubmissionDTO");

    try {/*from  www.ja  v  a2 s .c o  m*/
        SubmissionDTO submissionDTO = (SubmissionDTO) jsonMessageConverter.fromMessage(message);

        Submission submit = new SubmissionDTOToSubmissionAdapter(submissionDTO);

        log.info(String.format("Working on submission: %s", submit.toString()));

        Submission result = engine.call(submit);

        log.info(String.format("Sending sid %s: %s. %s", result.getId(), result.getVerdict(),
                result.getErrorMessage() == null ? "" : result.getErrorMessage()));

        VerdictDTO verdict = new SubmissionToVerdictDTOAdapter(result);

        submitTemplate.convertAndSend(verdict, new MessagePostProcessor() {
            @Override
            public Message postProcessMessage(Message message) throws AmqpException {
                message.getMessageProperties().setHeader("__TypeId__", "UEngineVerdict");
                return message;
            }
        });

        channel.basicAck(message.getMessageProperties().getDeliveryTag(), false);

    } catch (MessageConversionException messageConversionException) {
        channel.basicNack(message.getMessageProperties().getDeliveryTag(), false, false);
        log.error(String.format("Wrong submission format: %s", messageConversionException.getMessage()));
    } catch (Exception ex) {
        channel.basicNack(message.getMessageProperties().getDeliveryTag(), false, false);
        log.error(String.format("Error preocessing message with correlationId: %s",
                message.getMessageProperties().getCorrelationId()));
    }
}

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From source file:dfki.sb.rabbitmqjava.RabbitMQObjectStreamServer.java

License:Open Source License

private static void processSendAndRecivePackets(QueueingConsumer consumer, Channel channel)
        throws InterruptedException, IOException {
    while (true) {
        QueueingConsumer.Delivery delivery = consumer.nextDelivery();
        BasicProperties props = delivery.getProperties();
        BasicProperties replyProps = new BasicProperties.Builder().correlationId(props.getCorrelationId())
                .build();/*from w w  w  .jav a 2  s  .  com*/
        try {
            byte[] body = delivery.getBody();
            if (body.length == 0) {
                break;
            } else {
                Object obj = SerializationUtils.deserialize(body);
                if (obj instanceof MarketData) {
                    MarketData response = sendMarketData((MarketData) obj);
                    channel.basicPublish("", props.getReplyTo(), replyProps,
                            SerializationUtils.serialize(response));
                } else {
                    QuoteRequest response = sendQuoteRequest((QuoteRequest) obj);
                    channel.basicPublish("", props.getReplyTo(), replyProps,
                            SerializationUtils.serialize(response));
                }
            }
        } catch (IOException e) {
            System.out.println(" [.] " + e.toString());
        } finally {
            channel.basicAck(delivery.getEnvelope().getDeliveryTag(), false);
        }
    }
}

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From source file:dfki.sb.rabbitmqjava.RabbitMQServer.java

License:Open Source License

public static void main(String[] argv) {
    Connection connection = null;
    Channel channel = null;
    try {/* w  w w.  ja  va  2 s . co  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("Starting server waiting for client requests:");
        while (true) {
            QueueingConsumer.Delivery delivery = consumer.nextDelivery();
            BasicProperties props = delivery.getProperties();
            BasicProperties replyProps = new BasicProperties.Builder().correlationId(props.getCorrelationId())
                    .build();
            DataInputStream dis = new DataInputStream(
                    new BufferedInputStream(new ByteArrayInputStream(delivery.getBody())));
            try {
                int type = dis.readInt();
                byte[] response;
                if (type == 2) {
                    response = handleMarketRequest(dis);
                } else {
                    response = handleQuoteRequest(dis);
                }
                channel.basicPublish("", props.getReplyTo(), replyProps, response);
                dis.close();
            } catch (IOException | ClassNotFoundException e) {
                System.out.println(" [.] " + e.toString());
            } finally {
                channel.basicAck(delivery.getEnvelope().getDeliveryTag(), false);
            }
        }
    } catch (IOException | InterruptedException | ShutdownSignalException | ConsumerCancelledException e) {
        e.printStackTrace();
    } finally {
        if (connection != null) {
            try {
                connection.close();
            } catch (IOException ignore) {
            }
        }
    }
}

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From source file:dk.bankjsonrabbit.controller.CalculateQuote.java

public static void receiveMessages() throws IOException, InterruptedException, TimeoutException {
    gson = new Gson();

    HashMap<String, Object> objects = Receive.setUpReceiver();

    QueueingConsumer consumer = (QueueingConsumer) objects.get("consumer");
    Channel channel = (Channel) objects.get("channel");

    LoanRequestDTO loanRequestDTO;//from www  .  ja  v  a  2  s  .  c  o  m
    LoanResponseDTO loanResponseDTO;

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

        AMQP.BasicProperties props = delivery.getProperties();
        AMQP.BasicProperties replyProps = new AMQP.BasicProperties.Builder()
                .correlationId(props.getCorrelationId()).replyTo(props.getReplyTo()).headers(props.getHeaders())
                .build();

        loanRequestDTO = gson.fromJson(message, LoanRequestDTO.class);

        double interestRate = new Random().nextDouble() * 20;

        loanResponseDTO = new LoanResponseDTO(interestRate, loanRequestDTO.getSsn());

        System.out.println(loanResponseDTO.toString());

        sendMessage(loanResponseDTO, replyProps);
        channel.basicAck(delivery.getEnvelope().getDeliveryTag(), false);
    }

}

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From source file:dk.getcreditscore.controller.CalculateCreditScore.java

public static void receiveMessages() throws IOException, InterruptedException {
    gson = new Gson();

    HashMap<String, Object> objects = Receive.setUpReceiver();

    QueueingConsumer consumer = (QueueingConsumer) objects.get("consumer");
    Channel channel = (Channel) objects.get("channel");

    LoanRequestDTO loanRequestDTO;/*from   w  ww.  ja v  a2s.  c  o  m*/

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

        loanRequestDTO = gson.fromJson(message, LoanRequestDTO.class);

        CreditScoreService_Service service = new CreditScoreService_Service();
        int creditScore = service.getCreditScoreServicePort().creditScore(loanRequestDTO.getSsn());

        loanRequestDTO.setCreditScore(creditScore);

        System.out.println(loanRequestDTO.toString());

        sendMessage(loanRequestDTO);

        channel.basicAck(delivery.getEnvelope().getDeliveryTag(), false);
    }

}

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From source file:dk.normalizer.controller.NormalizeFromBankJSON.java

public static void receiveMessages() throws IOException, InterruptedException {
    gson = new Gson();

    HashMap<String, Object> objects = Receive.setUpReceiver();

    QueueingConsumer consumer = (QueueingConsumer) objects.get("consumer");
    Channel channel = (Channel) objects.get("channel");

    LoanResponseDTO loanResponseDTO;//from w ww .  j a v  a2s  .c o  m

    while (true) {
        QueueingConsumer.Delivery delivery = consumer.nextDelivery();
        String message = new String(delivery.getBody());
        AMQP.BasicProperties props = delivery.getProperties();
        AMQP.BasicProperties replyProps = new AMQP.BasicProperties.Builder()
                .correlationId(props.getCorrelationId()).build();
        System.out.println(props.getCorrelationId());
        System.out.println(props.getReplyTo());

        System.out.println(message);

        loanResponseDTO = gson.fromJson(message, LoanResponseDTO.class);

        System.out.println(loanResponseDTO.toString());

        //          sendMessage();

        channel.basicAck(delivery.getEnvelope().getDeliveryTag(), false);
    }

}

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From source file:dk.normalizer.controller.NormalizeFromBankRabbit.java

public static void receiveMessages() throws IOException, InterruptedException {
    gson = new Gson();

    HashMap<String, Object> objects = Receive.setUpReceiver();

    QueueingConsumer consumer = (QueueingConsumer) objects.get("consumer");
    Channel channel = (Channel) objects.get("channel");

    LoanResponseDTO loanResponseDTO;/*from w  w  w  .  j  a  va  2 s. c o  m*/

    while (true) {
        QueueingConsumer.Delivery delivery = consumer.nextDelivery();
        String message = new String(delivery.getBody());
        //          AMQP.BasicProperties props = delivery.getProperties();
        //          AMQP.BasicProperties replyProps = new AMQP.BasicProperties.Builder().correlationId(props.getCorrelationId()).build();
        //          System.out.println(props.getCorrelationId());
        //          System.out.println(props.getReplyTo());

        //          loanResponseDTO = gson.fromJson(message, LoanResponseDTO.class);

        //          System.out.println(loanResponseDTO.toString());

        //          sendMessage();

        channel.basicAck(delivery.getEnvelope().getDeliveryTag(), false);
    }

}

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From source file:dk.normalizer.controller.NormalizeFromBankService.java

public static void receiveMessages() throws IOException, InterruptedException {
    gson = new Gson();

    HashMap<String, Object> objects = Receive.setUpReceiver();

    QueueingConsumer consumer = (QueueingConsumer) objects.get("consumer");
    Channel channel = (Channel) objects.get("channel");

    LoanResponseDTO loanResponseDTO;//from   w ww  .  j av a 2  s. c  o m

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

        //          AMQP.BasicProperties props = delivery.getProperties();
        //          AMQP.BasicProperties replyProps = new AMQP.BasicProperties.Builder().correlationId(props.getCorrelationId()).build();
        //          System.out.println(props.getCorrelationId());
        //          System.out.println(props.getReplyTo());

        System.out.println("Message: " + message);

        loanResponseDTO = gson.fromJson(message, LoanResponseDTO.class);

        System.out.println(loanResponseDTO.toString());

        //          sendMessage();

        channel.basicAck(delivery.getEnvelope().getDeliveryTag(), false);
    }

}

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From source file:dk.normalizer.controller.NormalizeFromBankXML.java

public static void receiveMessages() throws IOException, InterruptedException {
    gson = new Gson();

    HashMap<String, Object> objects = Receive.setUpReceiver();

    QueueingConsumer consumer = (QueueingConsumer) objects.get("consumer");
    Channel channel = (Channel) objects.get("channel");

    LoanResponseDTO loanResponseDTO;/*  w  ww . j av  a  2s  .c o  m*/
    XStream xStream = new XStream();

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

        AMQP.BasicProperties props = delivery.getProperties();
        AMQP.BasicProperties replyProps = new AMQP.BasicProperties.Builder()
                .correlationId(props.getCorrelationId()).build();
        System.out.println("CorrelationID = " + props.getCorrelationId());
        //          System.out.println(props.getReplyTo());
        System.out.println(message);

        loanResponseDTO = (LoanResponseDTO) xStream.fromXML(message);

        System.out.println("Converted from XML: " + loanResponseDTO.toString());

        //          sendMessage();

        channel.basicAck(delivery.getEnvelope().getDeliveryTag(), false);
    }

}

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