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multi: rename local and remote chan DBs

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As a preparation to not have a local and remote version of the database
around anymore, we rename the variables into what their actual function
is. In case of the RPC server we even directly use the channel graph
instead of the DB instance. This should allow us to extract the channel
graph into its own, separate database (perhaps with better access
characteristics) in the future.
This commit is contained in:
Oliver Gugger
2021-08-03 09:57:26 +02:00
parent abf3942228
commit 9138c8abac
10 changed files with 149 additions and 153 deletions
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27
lncfg/db.go
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@@ -79,22 +79,21 @@ func (db *DB) Init(ctx context.Context, dbPath string) error {
}
// DatabaseBackends is a two-tuple that holds the set of active database
// backends for the daemon. The two backends we expose are the local database
// backend, and the remote backend. The LocalDB attribute will always be
// populated. However, the remote DB will only be set if a replicated database
// is active.
// backends for the daemon. The two backends we expose are the graph database
// backend, and the channel state backend.
// TODO(guggero): Actually make fully remote.
type DatabaseBackends struct {
// LocalDB points to the local non-replicated backend.
LocalDB kvdb.Backend
// GraphDB points to the database backend that contains the less
// critical data that is accessed often, such as the channel graph and
// chain height hints.
GraphDB kvdb.Backend
// RemoteDB points to a possibly networked replicated backend. If no
// replicated backend is active, then this pointer will be nil.
RemoteDB kvdb.Backend
// ChanStateDB points to a possibly networked replicated backend that
// contains the critical channel state related data.
ChanStateDB kvdb.Backend
}
// GetBackends returns a set of kvdb.Backends as set in the DB config. The
// local database will ALWAYS be non-nil, while the remote database will only
// be populated if etcd is specified.
// GetBackends returns a set of kvdb.Backends as set in the DB config.
func (db *DB) GetBackends(ctx context.Context, dbPath string) (
*DatabaseBackends, error) {
@@ -125,8 +124,8 @@ func (db *DB) GetBackends(ctx context.Context, dbPath string) (
}
return &DatabaseBackends{
LocalDB: localDB,
RemoteDB: remoteDB,
GraphDB: localDB,
ChanStateDB: remoteDB,
}, nil
}