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package meta_cache
import ( "context" "fmt"
"github.com/chrislusf/seaweedfs/weed/filer" "github.com/chrislusf/seaweedfs/weed/glog" "github.com/chrislusf/seaweedfs/weed/pb/filer_pb" "github.com/chrislusf/seaweedfs/weed/util" )
func EnsureVisited(mc *MetaCache, client filer_pb.FilerClient, dirPath util.FullPath, entryChan chan *filer.Entry) error {
currentPath := dirPath
for {
// the directory children are already cached
// so no need for this and upper directories
if mc.isCachedFn(currentPath) { return nil }
if entryChan != nil && dirPath == currentPath { if err := doEnsureVisited(mc, client, currentPath, entryChan); err != nil { return err } } else { if err := doEnsureVisited(mc, client, currentPath, nil); err != nil { return err } }
// continue to parent directory
if currentPath != "/" { parent, _ := currentPath.DirAndName() currentPath = util.FullPath(parent) } else { break } }
return nil
}
func doEnsureVisited(mc *MetaCache, client filer_pb.FilerClient, path util.FullPath, entryChan chan *filer.Entry) error {
glog.V(4).Infof("ReadDirAllEntries %s ...", path)
err := util.Retry("ReadDirAllEntries", func() error { return filer_pb.ReadDirAllEntries(client, path, "", func(pbEntry *filer_pb.Entry, isLast bool) error { entry := filer.FromPbEntry(string(path), pbEntry) if IsHiddenSystemEntry(string(path), entry.Name()) { return nil } if err := mc.doInsertEntry(context.Background(), entry); err != nil { glog.V(0).Infof("read %s: %v", entry.FullPath, err) return err } if entryChan != nil { entryChan <- entry } return nil }) })
if err != nil { err = fmt.Errorf("list %s: %v", path, err) } mc.markCachedFn(path) return err }
func IsHiddenSystemEntry(dir, name string) bool { return dir == "/" && (name == "topics" || name == "etc") }
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