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From "Tellier Benoit (JIRA)" <server-...@james.apache.org>
Subject [jira] [Commented] (JAMES-2279) Write a WithPriority mailet and HasPriority matchers
Date Fri, 07 Jun 2019 11:04:00 GMT

    [ https://issues.apache.org/jira/browse/JAMES-2279?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16858506#comment-16858506

Tellier Benoit commented on JAMES-2279:

https://github.com/linagora/james-project/pull/2422 contributed this. Thanks to ilker yıldırım!

> Write a WithPriority mailet and HasPriority matchers
> ----------------------------------------------------
>                 Key: JAMES-2279
>                 URL: https://issues.apache.org/jira/browse/JAMES-2279
>             Project: James Server
>          Issue Type: New Feature
>          Components: Mailet Contributions
>    Affects Versions: master
>            Reporter: Tellier Benoit
>            Priority: Major
>              Labels: easyfix, feature, newbie
> James mail queues is handling mail priorities. See the *MailPrioritySupport* interface.
> This is done using the MAIL_PRIORITY mail attribute. It is an integer property ranging
from 0 (low) to 9 (high) and mail queue component will default to 5.
> Today, the mail processing unit akka mailetContainer can not change the priority set
by the SMTP layer (using *MailPriorityHandler*). This is a problem as we can not re-prioritise
outgoing emails, for instance in remote delivery queues.
> I would thus propose the following mailet:
> {code:xml}
> <mailet matcher="All" class="WithPriority">
>     <value>8</value>
> </mailet>
> {code}
> Furthermore, we might want to customize processing logic depending on the priority (might
it just be for debugging purpose).
> To do so, I propose to introduce the following matchers:
> {code:xml}
> <mailet matcher="HasPriority=8" class="Any"/>
> <mailet matcher="AtLeastPriority=8" class="Any"/>
> <mailet matcher="AtMostPriority=8" class="Any"/>
> {code}
> *How to do this?*
> In the `server/mailet/mailets` project, in the mailet package create the WithPriority
mailet which sets the MAIL_PRIORITY attribute. 
> Create the matchers in  `server/mailet/mailets` in the matcher package.
> Write unit tests for these mailets / matchers.
> Use MailetUtil content to parse the integer conditions/value. You can reuse https://github.com/linagora/james-project/pull/1215
to ease your work.

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