Message persistence in RabbitMQ

Question

I am writing a small app where i am using RabbitMQ to send/Receive a message. Everything is working ok, but i am struggling with message persistence.

I want message to remain in a Queue even in server restarts. I understand the concept of durability at exchange and Queue level and have set them to true (rather they are default as true). So when i restart my RabbitMQ server, exchange and Queue remains intact but the messages in a queue are deleted.

I am using EasyNetQ.IBus interface to send messages.

Thanks

can you show some code? like where you set up your channels / queues etc.. — Alex
– Alex, Commented Sep 22, 2015 at 14:38
Do you make messages themselves persistent, using delivery_mode message property? — Evk
– Evk, Commented Sep 22, 2015 at 14:42
@Evk: that what i am trying to figure out, where do i set delivery_mode. i have read about it but cant get my head around where/how to do it — Jay
– Jay, Commented Sep 22, 2015 at 14:45
@Jay I see that unless you explicitly set "persistentMessages=false" in your connection string, that should be true by default and it should use correct delivery_mode (=2). So we need some more info from you. — Evk
– Evk, Commented Sep 22, 2015 at 14:47

Vladimir Shiyanov · Accepted Answer · 2021-05-24 19:25:05Z

10

Using RabbitMQ.Client, you can set the delivery mode using IBasicProperties, which can be obtained using the method IModel.CreateBasicProperties().

using (IConnection conn = factory.CreateConnection())
using (IModel channel = conn.CreateModel())
{
    channel.ExchangeDeclare(exchange, ExchangeType.Direct, durable: true);
    channel.QueueDeclare(queue, durable: true, exclusive: false, autoDelete: false, arguments: null);
    channel.QueueBind(queue, exchange, routingKey, null);

    var props = channel.CreateBasicProperties();
    props.Persistent = true; // or props.DeliveryMode = 2;

    channel.BasicPublish(exchange, routingKey, props, Encoding.Default.GetBytes(message));
}

edited May 24, 2021 at 19:25

answered Nov 22, 2016 at 17:58

Vladimir Shiyanov

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1 Comment

Hamish Over a year ago

Note IBasicProperties has a Persistent property. So you can do props.Persistent = true;

Pang · Accepted Answer · 2020-07-22 04:01:44Z

4

To make your message persistent in RabbitMQ, you need to add MessageProperties.PERSISTENT_TEXT_PLAIN in your code.

import com.rabbitmq.client.MessageProperties;

channel.basicPublish("", "task_queue",
        MessageProperties.PERSISTENT_TEXT_PLAIN,
        message.getBytes());

edited Jul 22, 2020 at 4:01

Pang

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answered May 4, 2018 at 5:50

andani

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1 Comment

Christian Davén Over a year ago

I'm sure it works, but the question was regarding C#, not Java.

Pouria Montakhabi · Accepted Answer · 2022-08-07 10:34:10Z

1

Add these two lines after binding queue:

var properties = model.CreateBasicProperties();
properties.Persistent = true;

answered Aug 7, 2022 at 10:34

Pouria Montakhabi

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Comments

tsuryadi · Accepted Answer · 2021-10-15 04:53:05Z

0

Have you tried to enable the Lazy Queue? "Lazy Queues - queues that move their contents to disk as early as practically possible"

It can be enabled on the Policy level (my preference) or specific queue.

Full explanation is here https://www.rabbitmq.com/lazy-queues.html

answered Oct 15, 2021 at 4:53

tsuryadi

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