[JAMES-2811] DeletedMessageVault implemetation of retention

• Type: Sub-task
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 3.4.0
• Assignee: Unassigned
• Reporter: Benoit Tellier
• Created: 24/Jun/19 10:18
• Updated: 11/Jul/19 12:56
• Resolved: 11/Jul/19 12:48

Description

• calculating buckets for retention
• delete buckets by BlobStore API
• clean corresponding metadata in JAMES-2807

If bucket period can not be divided by retention period (for example: bucket period = 1 month, retention period = 1.5 month). Then calculate possible buckets then delete messages matching retention criterion inside them.

For the new implementation: maybe retention job doesn't need to use *vault.usersWithVault()* which is designed to fit with *mail repository version* in *DeleteByQueryExecutor* to perform retention. If can, we can remove that method and update the *DeleteByQueryExecutor*.

Asa reminder, the retention will be performed through webadmin task (already implemented) triggered by some external scheduling mechanism.