Tellier Benoit created JAMES-2703:
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             Summary: Deprecation after 3.3.0 - Removal after 3.4.0
                 Key: JAMES-2703
                 URL: https://issues.apache.org/jira/browse/JAMES-2703
             Project: James Server
          Issue Type: Task
    Affects Versions: 3.3.0
            Reporter: Tellier Benoit
             Fix For: 3.4.0



In order to improve overall James development experience, I propose to do a bit 
of post 3.3.0 cleanup.

The proposal is to mark the given components as deprecated now, then, if no 
contributor shows up and give some love to these components, remove it after 
3.4.0 release.

An associated vote will be started on the mailing list.

Here are the rationals:
 - Some components are not exposed to end users and affect our ability to 
refactor code.
 - These components do not receive contributions
 - These components are not well enough tested
 - We introduced some components that are better at performing that very task

The components are:

## mailbox

 - mailbox/cache
   Unused, not tested, low code quality
   End user will not be affected by this removal

## server/data

 - SieveDefaultRepository 
   Read the filesystem to retrieve sieve scripts, read only, one file per user
   This does not support sieve script management and rtequires dropping 
manually the filesystem
   Migration strategy: use SieveFileRepository & CLI to upload scripts

 - MBoxFileRepository
   Already deprecated, will target removal after 3.4.0
   Use FileMailRepository instead. Data migration can be done with reprocessing 
+ specific configuration

 - JDBCRecipientRewriteTable
   Already deprecated, will target removal after 3.4.0
   Use another RRT implementation

 - AbstractJdbcUsersRepository DefaultUsersJdbcRepository & 
JamesUsersJdbcRepository
   Already deprecated, will target removal after 3.4.0
   Use another UsersRepository implementation

## mailets

Note: these mailets are leveraging some storage capabilities of mailbox or 
server/data.

 - AbstractRecipientRewriteTable
   Already deprecated, will target removal after 3.4.0
   The mailet is responsible for the rule storage.  No tests. 
   Note that this would allow removing JDBCRecipientRewriteTable and 
XMLRecipientRewriteTable.
   Migration plan: add the rules in the standard RRT and use the classic RRT 
mailet.
   
 - JDBCAlias
   Already deprecated, will target removal after 3.4.0
   This mailet does the RRT. No tests.
   Migration plan: add the rules in the standard RRT and use the classic RRT 
mailet.

 - UsersRepositoryAliasingForwarding
   Already deprecated, will target removal after 3.4.0
   This buggy mailet expects the UsersRepository to be also a 
RecipientRewriteTable. Hopefully, we have no such freaks. 
   Otherwise behaves as the classic RRT mailet.
   Migration: Replace in the configuration by the classic RRT mailet

 - MailboxQuotaFixed, AbstractStorageQuota, AbstractQuotaMatcher
   Not using the quota API, these matchers do full inbox scans on each 
processed email. 
   It adds confiusion with the non-experimental  well tests IsOverQuota 
matcher, relying on the mailbox quota system.
   No test, big hierarchy
   Migration plan: Use IsOverQuota + quota APIs




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