Examples with AggregateMessage ProducerDummy.Messages.AggregateMessage used on opensource projects

Example 1 with AggregateMessage

use of ProducerDummy.Messages.AggregateMessage in project amos2022ss02-audit-chain by amosproj.

the class ConsumerClientBlockchain method start.

/**
 * Start receiving Messages from the RabbitMQ Server.
 * @throws IOException if an I/O error occurs
 * @throws TimeoutException if the timeout expires
 */
public void start() throws IOException, TimeoutException {
    System.out.println("Starting to receive Messages.");
    Connection connection = this.factory.newConnection();
    Channel channel = connection.createChannel();
    channel.queueDeclare(QUEUE_NAME, false, false, false, null);
    System.out.println(" [*] Waiting for messages.");
    DeliverCallback deliverCallback = (consumerTag, delivery) -> {
        AggregateMessage message;
        try {
            message = (AggregateMessage) AggregateConsumerClient.deserializeMessage(delivery.getBody());
        } catch (ClassNotFoundException e) {
            throw new RuntimeException(e);
        }
        Vector<Message> messages = message.getMessages();
        Integer[] seq_numbers = new Integer[messages.size()];
        String[] transactions = new String[messages.size()];
        int iterator = 0;
        for (Message m : messages) {
            // if you use instanceOf you could accept both Messages and HmacMessages
            m = (Hmac_Message) m;
            seq_numbers[iterator] = m.getSequence_number();
            transactions[iterator] = m.getMessage();
            iterator++;
        }
        blockchain.addABlock(seq_numbers, transactions);
    // blockchain.printBlockchain();
    };
    channel.basicConsume(QUEUE_NAME, true, deliverCallback, consumerTag -> {
    });
}

Example 2 with AggregateMessage

use of ProducerDummy.Messages.AggregateMessage in project amos2022ss02-audit-chain by amosproj.

the class AggregateConsumerClient method start.

public void start() throws IOException, TimeoutException {
    System.out.println("Starting to receive Messages.");
    Connection connection = this.factory.newConnection();
    Channel channel = connection.createChannel();
    channel.queueDeclare(QUEUE_NAME, false, false, false, null);
    DeliverCallback deliverCallback = (consumerTag, delivery) -> {
        AggregateMessage message;
        try {
            message = (AggregateMessage) deserializeMessage(delivery.getBody());
        } catch (ClassNotFoundException e) {
            throw new RuntimeException(e);
        }
        Vector<Message> messages = message.getMessages();
        for (int i = 0; i < message.getMessageSize(); i++) {
            Message single_message = messages.get(i);
            this.persistenceStrategy.StoreMessage(new JsonMessage(single_message.getSequence_number(), single_message.getMessage()));
            System.out.println(String.format("Received event %d with the content: %s", single_message.getSequence_number(), single_message.getMessage()));
        }
    };
    channel.basicConsume(QUEUE_NAME, true, deliverCallback, consumerTag -> {
    });
}

Example 3 with AggregateMessage

use of ProducerDummy.Messages.AggregateMessage in project amos2022ss02-audit-chain by amosproj.

the class AggregateMessageFilePersistence method ReadLastMessage.

@Override
public Message ReadLastMessage() {
    // TODO right now even if there are no Messages an empty Message will be returned, it should return NULL tho
    AggregateMessage messages = new AggregateMessage();
    File file = new File(this.filepath.toString());
    try {
        BufferedReader br = new BufferedReader(new FileReader(file));
        for (String line = br.readLine(); line != null; line = br.readLine()) {
            int number = Integer.parseInt(line);
            String message = br.readLine();
            messages.addMessage(new JsonMessage(number, message));
        }
        br.close();
    } catch (IOException e) {
        // there are no values in the file or the file is missing therefore we never did send a Messages.Message to the Broker
        return null;
    }
    return messages;
}