initial import

Signed-off-by: Vasiliy Tolstov <v.tolstov@selfip.ru>

journal/leveldb/leveldb.go

@@ -0,0 +1,76 @@
+package leveldb
+
+import (
+	"github.com/syndtr/goleveldb/leveldb"
+	"github.com/syndtr/goleveldb/leveldb/opt"
+	"github.com/sdstack/storage/cache"
+)
+
+type config struct {
+	Store string
+}
+
+type LevelDB struct {
+	db *leveldb.DB
+}
+
+func init() {
+	cache.RegisterCache("leveldb", &LevelDB{})
+}
+
+func (c *LevelDB) Configure(cfg interface{}) error {
+	return nil
+}
+
+func (c *LevelDB) Open() error {
+	var err error
+	c.db, err = leveldb.OpenFile("/srv/store/sc01/db", &opt.Options{
+		Compression: opt.NoCompression,
+	})
+	if err != nil {
+		return err
+	}
+	return nil
+}
+
+func (c *LevelDB) Close() error {
+	return c.db.Close()
+}
+
+func (c *LevelDB) Set(k interface{}, v interface{}) error {
+	return c.db.Put(k.([]byte), v.([]byte), nil)
+}
+
+func (c *LevelDB) Get(k interface{}) (interface{}, error) {
+	return c.db.Get(k.([]byte), nil)
+}
+
+func (c *LevelDB) Del(k interface{}) error {
+	return c.db.Delete(k.([]byte), nil)
+}
+
+func (c *LevelDB) Exists(k interface{}) (bool, error) {
+	return c.db.Has(k.([]byte), nil)
+}
+
+func (c *LevelDB) Keys() ([]interface{}, error) {
+	var keys []interface{}
+	var err error
+
+	iter := c.db.NewIterator(nil, nil)
+	for iter.Next() {
+		keys = append(keys, string(iter.Key()))
+	}
+
+	iter.Release()
+	err = iter.Error()
+	return keys, err
+}
+
+func (c *LevelDB) OnEvict(f func(interface{}, interface{})) error {
+	return nil
+}
+
+func (c *LevelDB) Purge() error {
+	return nil
+}