Examples with StoredEvent com.mt.common.domain.model.domain_event.StoredEvent used on opensource projects

Example 1 with StoredEvent

use of com.mt.common.domain.model.domain_event.StoredEvent in project mt-auth by publicdevop2019.

the class RabbitMqEventStreamService method subscribe.

@Override
public void subscribe(String subscribedApplicationName, boolean internal, @Nullable String fixedQueueName, Consumer<StoredEvent> consumer, String... topics) {
    String routingKeyWithoutTopic = subscribedApplicationName + "." + (internal ? "internal" : "external") + ".";
    String queueName;
    boolean autoDelete = false;
    if (fixedQueueName != null) {
        queueName = fixedQueueName;
    } else {
        // auto delete random generated queue
        autoDelete = true;
        long id = CommonDomainRegistry.getUniqueIdGeneratorService().id();
        String s;
        if (topics.length == 1) {
            s = MqHelper.handlerOf(appName, topics[0]);
        } else {
            s = MqHelper.handlerOf(appName, "combined_events");
        }
        queueName = Long.toString(id, 36) + "_" + s;
    }
    try {
        Channel channel = connectionSub.createChannel();
        channel.queueDeclare(queueName, true, false, autoDelete, null);
        // @todo find out proper prefetch value, this requires test in prod env
        channel.basicQos(10);
        checkExchange(channel);
        for (String topic : topics) {
            channel.queueBind(queueName, EXCHANGE_NAME, routingKeyWithoutTopic + topic);
        }
        channel.basicConsume(queueName, autoAck, (consumerTag, delivery) -> {
            log.trace("mq message received");
            String s = new String(delivery.getBody(), StandardCharsets.UTF_8);
            StoredEvent event = CommonDomainRegistry.getCustomObjectSerializer().deserialize(s, StoredEvent.class);
            log.debug("handling {} with id {}", ClassUtility.getShortName(event.getName()), event.getId());
            try {
                consumer.accept(event);
                long deliveryTag = delivery.getEnvelope().getDeliveryTag();
                channel.basicAck(deliveryTag, false);
            } catch (Exception ex) {
                log.error("error during consume, catch error to maintain connection", ex);
            }
            log.trace("mq message consumed");
        }, consumerTag -> {
        });
    } catch (IOException e) {
        log.error("unable create queue for {} with routing key {} and queue name {}", subscribedApplicationName, routingKeyWithoutTopic, queueName, e);
    }
}

Example 2 with StoredEvent

use of com.mt.common.domain.model.domain_event.StoredEvent in project mt-auth by publicdevop2019.

the class RabbitMQEventStreamService method subscribe.

@Override
public void subscribe(String subscribedApplicationName, boolean internal, @Nullable String fixedQueueName, Consumer<StoredEvent> consumer, String... topics) {
    String routingKeyWithoutTopic = subscribedApplicationName + "." + (internal ? "internal" : "external") + ".";
    String queueName;
    if (fixedQueueName != null) {
        queueName = fixedQueueName;
    } else {
        long id = CommonDomainRegistry.getUniqueIdGeneratorService().id();
        queueName = Long.toString(id, 36);
    }
    DeliverCallback deliverCallback = (consumerTag, delivery) -> {
        log.trace("mq message received");
        String s = new String(delivery.getBody(), StandardCharsets.UTF_8);
        StoredEvent event = CommonDomainRegistry.getCustomObjectSerializer().deserialize(s, StoredEvent.class);
        log.debug("handling {} with id {}", ClassUtility.getShortName(event.getName()), event.getId());
        try {
            consumer.accept(event);
        } catch (Exception ex) {
            log.error("error during consume, catch error to maintain connection", ex);
        }
        log.trace("mq message consumed");
    };
    try {
        Channel channel = connectionSub.createChannel();
        channel.queueDeclare(queueName, true, false, false, null);
        checkExchange(channel);
        for (String topic : topics) {
            channel.queueBind(queueName, EXCHANGE_NAME, routingKeyWithoutTopic + topic);
        }
        channel.basicConsume(queueName, true, deliverCallback, consumerTag -> {
        });
    } catch (IOException e) {
        log.error("unable create queue for {} with routing key {} and queue name {}", subscribedApplicationName, routingKeyWithoutTopic, queueName, e);
    }
}