// Open is part of the intents.file interface, it finds the metadata in the prelude and creates a bytes.Buffer from it.
func (mpf *MetadataPreludeFile) Open() error {
db, c := common.SplitNamespace(mpf.Origin)
dbMetadatas, ok := mpf.Prelude.NamespaceMetadatasByDB[db]
if !ok {
return fmt.Errorf("no metadata found for '%s'", db)
}
for _, metadata := range dbMetadatas {
if metadata.Collection == c {
mpf.Buffer = bytes.NewBufferString(metadata.Metadata)
return nil
}
}
return fmt.Errorf("no matching metadata found for '%s'", mpf.Origin)
}
// PutWithNamespace inserts an intent into the manager with the source set
// to the provided namespace. Intents for the same collection are merged
// together, so that BSON and metadata files for the same collection are
// returned in the same intent.
func (manager *Manager) PutWithNamespace(ns string, intent *Intent) {
if intent == nil {
panic("cannot insert nil *Intent into IntentManager")
}
db, _ := common.SplitNamespace(ns)
// bucket special-case collections
if intent.IsOplog() {
manager.PutOplogIntent(intent, intent.Namespace())
return
}
if intent.IsSystemIndexes() {
if intent.BSONFile != nil {
manager.indexIntents[db] = intent
manager.specialIntents[ns] = intent
}
return
}
if intent.IsUsers() {
if intent.BSONFile != nil {
manager.usersIntent = intent
manager.specialIntents[ns] = intent
}
return
}
if intent.IsRoles() {
if intent.BSONFile != nil {
manager.rolesIntent = intent
manager.specialIntents[ns] = intent
}
return
}
if intent.IsAuthVersion() {
if intent.BSONFile != nil {
manager.versionIntent = intent
manager.specialIntents[ns] = intent
}
return
}
manager.putNormalIntentWithNamespace(ns, intent)
}
// CreateIntentsForDB drills down into the dir folder, creating intents
// for all of the collection dump files it finds for the db database.
func (restore *MongoRestore) CreateIntentsForDB(db string, dir archive.DirLike) (err error) {
var entries []archive.DirLike
log.Logvf(log.DebugHigh, "reading collections for database %v in %v", db, dir.Name())
entries, err = dir.ReadDir()
if err != nil {
return fmt.Errorf("error reading db folder %v: %v", db, err)
}
usesMetadataFiles := hasMetadataFiles(entries)
for _, entry := range entries {
if entry.IsDir() {
log.Logvf(log.Always, `don't know what to do with subdirectory "%v", skipping...`,
filepath.Join(dir.Name(), entry.Name()))
} else {
collection, fileType := restore.getInfoFromFilename(entry.Name())
sourceNS := db + "." + collection
switch fileType {
case BSONFileType:
var skip bool
// Dumps of a single database (i.e. with the -d flag) may contain special
// db-specific collections that start with a "$" (for example, $admin.system.users
// holds the users for a database that was dumped with --dumpDbUsersAndRoles enabled).
// If these special files manage to be included in a dump directory during a full
// (multi-db) restore, we should ignore them.
if restore.NSOptions.DB == "" && strings.HasPrefix(collection, "$") {
log.Logvf(log.DebugLow, "not restoring special collection %v.%v", db, collection)
skip = true
}
// TOOLS-717: disallow restoring to the system.profile collection.
// Server versions >= 3.0.3 disallow user inserts to system.profile so
// it would likely fail anyway.
if collection == "system.profile" {
log.Logvf(log.DebugLow, "skipping restore of system.profile collection", db)
skip = true
}
// skip restoring the indexes collection if we are using metadata
// files to store index information, to eliminate redundancy
if collection == "system.indexes" && usesMetadataFiles {
log.Logvf(log.DebugLow,
"not restoring system.indexes collection because database %v "+
"has .metadata.json files", db)
skip = true
}
if !restore.includer.Has(sourceNS) {
log.Logvf(log.DebugLow, "skipping restoring %v.%v, it is not included", db, collection)
skip = true
}
if restore.excluder.Has(sourceNS) {
log.Logvf(log.DebugLow, "skipping restoring %v.%v, it is excluded", db, collection)
skip = true
}
destNS := restore.renamer.Get(sourceNS)
destDB, destC := common.SplitNamespace(destNS)
intent := &intents.Intent{
DB: destDB,
C: destC,
Size: entry.Size(),
}
if restore.InputOptions.Archive != "" {
if restore.InputOptions.Archive == "-" {
intent.Location = "archive on stdin"
} else {
intent.Location = fmt.Sprintf("archive '%v'", restore.InputOptions.Archive)
}
if skip {
// adding the DemuxOut to the demux, but not adding the intent to the manager
mutedOut := &archive.MutedCollection{Intent: intent, Demux: restore.archive.Demux}
restore.archive.Demux.Open(sourceNS, mutedOut)
continue
}
if intent.IsSpecialCollection() {
specialCollectionCache := archive.NewSpecialCollectionCache(intent, restore.archive.Demux)
intent.BSONFile = specialCollectionCache
restore.archive.Demux.Open(sourceNS, specialCollectionCache)
} else {
intent.BSONFile = &archive.RegularCollectionReceiver{
Origin: sourceNS,
Intent: intent,
Demux: restore.archive.Demux,
}
}
} else {
if skip {
continue
}
intent.Location = entry.Path()
intent.BSONFile = &realBSONFile{path: entry.Path(), intent: intent, gzip: restore.InputOptions.Gzip}
}
log.Logvf(log.Info, "found collection %v bson to restore to %v", sourceNS, destNS)
restore.manager.PutWithNamespace(sourceNS, intent)
case MetadataFileType:
if collection == "system.profile" {
log.Logvf(log.DebugLow, "skipping restore of system.profile metadata")
continue
}
if !restore.includer.Has(sourceNS) {
log.Logvf(log.DebugLow, "skipping restoring %v.%v metadata, it is not included", db, collection)
continue
}
if restore.excluder.Has(sourceNS) {
log.Logvf(log.DebugLow, "skipping restoring %v.%v metadata, it is excluded", db, collection)
continue
}
usesMetadataFiles = true
destNS := restore.renamer.Get(sourceNS)
rnDB, rnC := common.SplitNamespace(destNS)
intent := &intents.Intent{
DB: rnDB,
C: rnC,
}
if restore.InputOptions.Archive != "" {
if restore.InputOptions.Archive == "-" {
intent.MetadataLocation = "archive on stdin"
} else {
intent.MetadataLocation = fmt.Sprintf("archive '%v'", restore.InputOptions.Archive)
}
intent.MetadataFile = &archive.MetadataPreludeFile{Origin: sourceNS, Intent: intent, Prelude: restore.archive.Prelude}
} else {
intent.MetadataLocation = entry.Path()
intent.MetadataFile = &realMetadataFile{path: entry.Path(), intent: intent, gzip: restore.InputOptions.Gzip}
}
log.Logvf(log.Info, "found collection metadata from %v to restore to %v", sourceNS, destNS)
restore.manager.PutWithNamespace(sourceNS, intent)
default:
log.Logvf(log.Always, `don't know what to do with file "%v", skipping...`,
entry.Path())
}
}
}
return nil
}
func stripDBFromNS(ns string) string {
_, c := common.SplitNamespace(ns)
return c
}