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snap: add Read function

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This commit is contained in:
Xiang Li 2015-02-11 10:21:19 -08:00
parent fe1d9565c2
commit 71bed48916
1 changed files with 14 additions and 14 deletions
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28
snap/snapshotter.go
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@ -86,25 +86,25 @@ func (s *Snapshotter) Load() (*raftpb.Snapshot, error) {
}
func loadSnap(dir, name string) (*raftpb.Snapshot, error) {
var err error
var b []byte
fpath := path.Join(dir, name)
defer func() {
if err != nil {
renameBroken(fpath)
}
}()
b, err = ioutil.ReadFile(fpath)
snap, err := Read(fpath)
if err != nil {
log.Printf("snap: snapshotter cannot read file %v: %v", name, err)
renameBroken(fpath)
}
return snap, err
}
// Read reads the snapshot named by snapname and returns the snapshot.
func Read(snapname string) (*raftpb.Snapshot, error) {
b, err := ioutil.ReadFile(snapname)
if err != nil {
log.Printf("snap: snapshotter cannot read file %v: %v", snapname, err)
return nil, err
}
var serializedSnap snappb.Snapshot
if err = serializedSnap.Unmarshal(b); err != nil {
log.Printf("snap: corrupted snapshot file %v: %v", name, err)
log.Printf("snap: corrupted snapshot file %v: %v", snapname, err)
return nil, err
}
@ -115,13 +115,13 @@ func loadSnap(dir, name string) (*raftpb.Snapshot, error) {
crc := crc32.Update(0, crcTable, serializedSnap.Data)
if crc != serializedSnap.Crc {
log.Printf("snap: corrupted snapshot file %v: crc mismatch", name)
log.Printf("snap: corrupted snapshot file %v: crc mismatch", snapname)
return nil, ErrCRCMismatch
}
var snap raftpb.Snapshot
if err = snap.Unmarshal(serializedSnap.Data); err != nil {
log.Printf("snap: corrupted snapshot file %v: %v", name, err)
log.Printf("snap: corrupted snapshot file %v: %v", snapname, err)
return nil, err
}
return &snap, nil