- Add Clear method to the storages

Signed-off-by: Valery Piashchynski <[email protected]>

4 files changed, 55 insertions, 1 deletions

diff --git a/plugins/kv/drivers/boltdb/driver.go b/plugins/kv/drivers/boltdb/driver.go
index 4b675271..0b411e5e 100644
--- a/plugins/kv/drivers/boltdb/driver.go
+++ b/plugins/kv/drivers/boltdb/driver.go
@@ -373,6 +373,31 @@ func (d *Driver) TTL(keys ...string) (map[string]string, error) {
 	return m, nil
 }
 
+func (d *Driver) Clear() error {
+	err := d.DB.Update(func(tx *bolt.Tx) error {
+		err := tx.DeleteBucket(d.bucket)
+		if err != nil {
+			d.log.Error("boltdb delete bucket", "error", err)
+			return err
+		}
+
+		_, err = tx.CreateBucket(d.bucket)
+		if err != nil {
+			d.log.Error("boltdb create bucket", "error", err)
+			return err
+		}
+
+		return nil
+	})
+
+	if err != nil {
+		d.log.Error("clear transaction failed", "error", err)
+		return err
+	}
+
+	return nil
+}
+
 // ========================= PRIVATE =================================
 
 func (d *Driver) startGCLoop() { //nolint:gocognit
diff --git a/plugins/kv/drivers/memcached/driver.go b/plugins/kv/drivers/memcached/driver.go
index a2787d72..14e7c078 100644
--- a/plugins/kv/drivers/memcached/driver.go
+++ b/plugins/kv/drivers/memcached/driver.go
@@ -237,3 +237,13 @@ func (d *Driver) Delete(keys ...string) error {
 	}
 	return nil
 }
+
+func (d *Driver) Clear() error {
+	err := d.client.DeleteAll()
+	if err != nil {
+		d.log.Error("flush_all operation failed", "error", err)
+		return err
+	}
+
+	return nil
+}
diff --git a/plugins/kv/interface.go b/plugins/kv/interface.go
index ffdbbe62..5736a6a7 100644
--- a/plugins/kv/interface.go
+++ b/plugins/kv/interface.go
@@ -22,9 +22,12 @@ type Storage interface {
 	MExpire(items ...*kvv1.Item) error
 
 	// TTL return the rest time to live for provided keys
-	// Not supported for the memcached and boltdb
+	// Not supported for the memcached
 	TTL(keys ...string) (map[string]string, error)
 
+	// Clear clean the entire storage
+	Clear() error
+
 	// Delete one or multiple keys.
 	Delete(keys ...string) error
 }
diff --git a/plugins/kv/rpc.go b/plugins/kv/rpc.go
index af763600..3f7ba97c 100644
--- a/plugins/kv/rpc.go
+++ b/plugins/kv/rpc.go
@@ -161,3 +161,19 @@ func (r *rpc) Delete(in *kvv1.Request, _ *kvv1.Response) error {
 
 	return errors.E(op, errors.Errorf("no such storage: %s", in.GetStorage()))
 }
+
+// Clear clean the storage
+func (r *rpc) Clear(in *kvv1.Request, _ *kvv1.Response) error {
+	const op = errors.Op("rcp_delete")
+
+	if st, exists := r.storages[in.GetStorage()]; exists {
+		err := st.Clear()
+		if err != nil {
+			return errors.E(op, err)
+		}
+
+		return nil
+	}
+
+	return errors.E(op, errors.Errorf("no such storage: %s", in.GetStorage()))
+}