func TestDb_CreateReopenDbOnFile(t *testing.T) {
dbpath := filepath.Join(os.TempDir(), fmt.Sprintf("goleveldbtestCreateReopenDbOnFile-%d", os.Getuid()))
if err := os.RemoveAll(dbpath); err != nil {
t.Fatal("cannot remove old db: ", err)
}
defer os.RemoveAll(dbpath)
for i := 0; i < 3; i++ {
stor, err := storage.OpenFile(dbpath)
if err != nil {
t.Fatalf("(%d) cannot open storage: %s", i, err)
}
db, err := Open(stor, nil)
if err != nil {
t.Fatalf("(%d) cannot open db: %s", i, err)
}
if err := db.Put([]byte("foo"), []byte("bar"), nil); err != nil {
t.Fatalf("(%d) cannot write to db: %s", i, err)
}
if err := db.Close(); err != nil {
t.Fatalf("(%d) cannot close db: %s", i, err)
}
if err := stor.Close(); err != nil {
t.Fatalf("(%d) cannot close storage: %s", i, err)
}
}
}
func openDBBench(b *testing.B, noCompress bool) *dbBench {
_, err := os.Stat(benchDB)
if err == nil {
err = os.RemoveAll(benchDB)
if err != nil {
b.Fatal("cannot remove old db: ", err)
}
}
p := &dbBench{
b: b,
o: &opt.Options{},
ro: &opt.ReadOptions{},
wo: &opt.WriteOptions{},
}
p.stor, err = storage.OpenFile(benchDB)
if err != nil {
b.Fatal("cannot open stor: ", err)
}
if noCompress {
p.o.Compression = opt.NoCompression
}
p.db, err = Open(p.stor, p.o)
if err != nil {
b.Fatal("cannot open db: ", err)
}
runtime.GOMAXPROCS(runtime.NumCPU())
return p
}
func newTestStorage(t *testing.T) *testStorage {
var stor storage.Storage
var closeFn func() error
if tsFS {
for {
tsMU.Lock()
num := tsNum
tsNum++
tsMU.Unlock()
path := filepath.Join(os.TempDir(), fmt.Sprintf("goleveldb-test%d0%d0%d", os.Getuid(), os.Getpid(), num))
if _, err := os.Stat(path); err != nil {
stor, err = storage.OpenFile(path)
if err != nil {
t.Fatalf("F: cannot create storage: %v", err)
}
t.Logf("I: storage created: %s", path)
closeFn = func() error {
for _, name := range []string{"LOG.old", "LOG"} {
f, err := os.Open(filepath.Join(path, name))
if err != nil {
continue
}
if log, err := ioutil.ReadAll(f); err != nil {
t.Logf("---------------------- %s ----------------------", name)
t.Logf("cannot read log: %v", err)
t.Logf("---------------------- %s ----------------------", name)
} else if len(log) > 0 {
t.Logf("---------------------- %s ----------------------\n%s", name, string(log))
t.Logf("---------------------- %s ----------------------", name)
}
f.Close()
}
if tsKeepFS {
return nil
}
return os.RemoveAll(path)
}
break
}
}
} else {
stor = storage.NewMemStorage()
}
ts := &testStorage{
t: t,
Storage: stor,
closeFn: closeFn,
opens: make(map[uint64]bool),
}
ts.cond.L = &ts.mu
return ts
}
// OpenFile opens or creates a DB for the given path. OpenFile uses standard
// file-system backed storage implementation as desribed in the leveldb/storage
// package.
// The DB will be created if not exist, unless ErrorIfMissing is true.
// Also, if ErrorIfExist is true and the DB exist OpenFile will returns
// os.ErrExist error.
//
// The DB must be closed after use, by calling Close method.
func OpenFile(path string, o *opt.Options) (db *DB, err error) {
stor, err := storage.OpenFile(path)
if err != nil {
return
}
db, err = Open(stor, o)
if err != nil {
stor.Close()
} else {
db.closer = stor
}
return
}