[BOOKKEEPER-566] provide a bookie store interface.

• Type: Improvement
• Status: Resolved
• Priority: Major
• Resolution: Won't Fix
• Component/s: bookkeeper-server
• Assignee: Unassigned
• Reporter: Sijie Guo
• Created: 09/Feb/13 05:07
• Updated: 12/Mar/15 08:05
• Resolved: 12/Mar/15 08:05

Description

Currently, Bookie does a lot of things, managing storage, managing bookie state (readonly or shutdown), handling zookeeper connections. It would be better to put SyncThread, Journal and LedgerStorage under a bookie store interface. so bookie just interacts with BookieStore for storage, interacts with ZooKeeper for membership management and manage the state transition through a StateTransitor (turn to readonly or shutdown).

A BookieStore interface is easy to evaluate storage performance itself, and easy for plugging different storage implementation in future.