[jira] [Created] (JAMES-3081) Make messages persistent in rabbitmq mailqueue

["Rémi Kowalski (Jira)" <se...@james.apache.org>]

Rémi Kowalski created JAMES-3081:
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             Summary: Make messages persistent in rabbitmq mailqueue
                 Key: JAMES-3081
                 URL: https://issues.apache.org/jira/browse/JAMES-3081
             Project: James Server
          Issue Type: Improvement
            Reporter: Rémi Kowalski


Regarding the persistence of messages in rabbitmq : To achieve this there are two steps :

the queue must be declared as durable (the declaration of the queue is persisted rabbitmq is restarted)
 when sending a message, it must have a property setting its delivery_mode to persistent. (the messages with this property are persisted in case of a restart of rabbitmq)

At the time being the rabbitmq mailqueue in james :

the queue is declared durable => Good
 the delivery_mode property is not set => Not good
 the exchange is not declared durable => Seems not good, but need testing

What should be done is :

set the `delivery_mode` property to '2' ( see https://www.rabbitmq.com/releases/rabbitmq-java-client/v2.4.1/rabbitmq-java-client-javadoc-2.4.1/index.html?com/rabbitmq/client/MessageProperties.html )

verify if the exchange need to be declared 'durable' too. if so it will need an entry in the migration guide. As it will need to be deleted an created back with the new properties.



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