[MAILBOX-268] Make attachment an top-level Entity

• Type: Task
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Component/s: store
• Assignee: Unassigned
• Reporter: Matthieu Baechler
• Created: 19/May/16 12:55
• Updated: 27/May/16 09:27
• Resolved: 27/May/16 09:25

Description

Attachment should be query-able without any message.
It opens the way to direct download and upload of attachment for Jmap but will also allow attachment de-duplication in storage.

We should create AttachmentMapper / AttachmentMapperFactory classes.
AttachmentManager should implement :

void storeAttachment(Attachment)
Attachment getAttachment(AttachmentId)

We will propose a cassandra implementation.

Attachment table should looks like :
attachmentId (probably a SHA1), payload, type, size

Some test cases :

Asking for a non referenced AttachmentId should throw.
Asking for a referenced AttachmentId should get the attachment.
Asking for a null AttachmentId should throw.
Asking for a malformed AttachmentId should throw.