Components

The following diagram shows the RnR and its dependencies.

Component	Description
DBOP	Backend service which perform database database init process.
ReplayMgr	Backend service expose RESTful API for client.
MsgOp	Backend service handle init and do playback session.
TransformMsg	Backend service do pre-processing nats event to sql statment.
SchduleJob	Backend cronjob to take snapshot in livedb, cleanup data in database and storage
Timekeeper	Backend service update interval current time into database.
Playback controller	Simple controller in playback web.
NATS	NATS stream, including 2 kind of events: CDC event and playback event (communication between DBOP, ReplayMgr, and Msgop)