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

Example 1 with JsonMessage

use of ProducerDummy.Messages.JsonMessage 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 2 with JsonMessage

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

the class Client method start.

/**
 * Start Sending Messages as JSON to the RabbitMQ Server.
 * TODO sending Messages is still bad and just a minimal example make it better
 * @throws IOException if an I/O error occurs
 * @throws TimeoutException if the timeout expires
 * @throws InterruptedException if the thread is interrupted
 */
public void start() throws IOException, TimeoutException {
    System.out.println("Starting to send Messages.Message to AMQP Host");
    try (Connection connection = this.factory.newConnection();
        Channel channel = connection.createChannel()) {
        channel.queueDeclare(QUEUE_NAME, false, false, false, null);
        // Recover last Message which was stored in file and maybe was not send
        Message message = this.recoverLastMessage();
        if (message != null) {
            channel.basicPublish("", QUEUE_NAME, null, serialize(message));
            this.sequence_number += 1;
        }
        for (String line = this.dataGenerator.getData(); line != null; line = this.dataGenerator.getData()) {
            System.out.println("The following Messages.Message will be send:\n" + line);
            message = new JsonMessage(this.sequence_number, line);
            this.persistenceStrategy.StoreMessage(message);
            channel.basicPublish("", QUEUE_NAME, null, serialize(message));
            this.sequence_number += 1;
            try {
                TimeUnit.SECONDS.sleep(SECOND_DELAY_BETWEEN_MESSAGES);
            } catch (InterruptedException e) {
                System.out.println("Thread was interrupted");
            }
        }
    }
}

Example 3 with JsonMessage

use of ProducerDummy.Messages.JsonMessage 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;
}