[jira] [Assigned] (JAMES-4125) Rework Mailet api

     [ https://issues.apache.org/jira/browse/JAMES-4125?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Jean Helou reassigned JAMES-4125:
---------------------------------

    Assignee: Jean Helou

> Rework Mailet api 
> ------------------
>
>                 Key: JAMES-4125
>                 URL: https://issues.apache.org/jira/browse/JAMES-4125
>             Project: James Server
>          Issue Type: Improvement
>            Reporter: Jean Helou
>            Assignee: Jean Helou
>            Priority: Major
>
> While prototyping a new DKIM mailet which would sign with a sender's domain specific key instead of using a fixed private key I realized the design of the mailet API is ... perfectible. 
>  
> I propose the following changes 
>  # improve the GuiceMailetLoader to no longer rely on the init() method but instead bind the proper mailet config in a child context as is done for the GuiceMailRepositoryLoader. 
>  # apply default methods to the mailet api so implementing a mailet from scratch (not using GenericMailet{^}1{^}) is easier
>  # change the Mailet interface to get rid of the getMailetConfig method entirely as it is only used to get the context and the error handlers from the engine
>  ** it is not the mailet responsibility to provide the context to the engine 
>  ** the getConfig would be replaced by 2 methods to explicitely provide error handlers instead of relying on an undocumented convention 
> ^1^  GenericMailet is both a Mailet and a MailetConfig which doesn´t  sound quite right, it also implements default behaviours that would be better placed as default methods on the interface



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