[jira] [Resolved] (JAMES-3080) Make messages persistent in rabbitmq task manager workqueue

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

     [ https://issues.apache.org/jira/browse/JAMES-3080?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Rémi Kowalski resolved JAMES-3080.
----------------------------------
    Fix Version/s: 3.5.0
       Resolution: Fixed

> Make messages persistent in rabbitmq task manager workqueue
> -----------------------------------------------------------
>
>                 Key: JAMES-3080
>                 URL: https://issues.apache.org/jira/browse/JAMES-3080
>             Project: James Server
>          Issue Type: Improvement
>            Reporter: Rémi Kowalski
>            Priority: Major
>             Fix For: 3.5.0
>
>
> 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 workqueue 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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