msgcache

type Cache interface {
	CacheMessage(service, username string, msg *rpc.MessageContainer, ttl time.Duration) (id string, err error)
	// XXX Is there any better way to support retrieve all feature?
	Get(service, username, id string) (msg *rpc.MessageContainer, err error)
	RetrieveAllSince(service, username string, since time.Time) (msgs []*rpc.MessageContainer, err error)
	Close() error
}

type CacheManager interface {
	GetCache(host, username, password, database string, port int) (Cache, error)
	Engine() string
}