Function NewDB

core/metadata/db.go:120–141

NewDB creates a new metadata database using the provided bolt database, content store, and snapshotters.

(db Transactor, cs content.Store, ss map[string]snapshots.Snapshotter, opts ...DBOpt)

// NewDB creates a new metadata database using the provided
// bolt database, content store, and snapshotters.
func NewDB(db Transactor, cs content.Store, ss map[string]snapshots.Snapshotter, opts ...DBOpt) *DB {
	m := &DB{
		db:      db,
		ss:      make(map[string]*snapshotter, len(ss)),
		dirtySS: map[string]struct{}{},
		dbopts: dbOptions{
			shared: true,
		},
	}

	for _, opt := range opts {
		opt(&m.dbopts)
	}

	// Initialize data stores
	m.cs = newContentStore(m, m.dbopts.shared, cs)
	for name, sn := range ss {
		m.ss[name] = newSnapshotter(m, name, sn)
	}

	return m
}

// Close closes the underlying bolt database.
// Acquires wlock so no GC cycle is in progress when bolt is closed.