// call KVAutobus keyvalue_range API and covert to slice of storage.KeyValue
func (db *KVAutobus) getRange(kStart, kEnd storage.Key) ([]*storage.KeyValue, error) {
mkvs, err := db.getKVRange(kStart, kEnd)
if err != nil {
return nil, err
}
kvs := make([]*storage.KeyValue, len(mkvs))
for i, mkv := range mkvs {
kvs[i] = &storage.KeyValue{storage.Key(mkv[0]), []byte(mkv[1])}
}
return kvs, nil
}
// RawRangeQuery sends a range of full keys. This is to be used for low-level data
// retrieval like DVID-to-DVID communication and should not be used by data type
// implementations if possible. A nil is sent down the channel when the
// range is complete.
func (db *KVAutobus) RawRangeQuery(kStart, kEnd storage.Key, keysOnly bool, out chan *storage.KeyValue, cancel <-chan struct{}) error {
var value []byte
if keysOnly {
keys, err := db.getKeyRange(kStart, kEnd)
if err != nil {
return err
}
for _, key := range keys {
out <- &storage.KeyValue{storage.Key(key), value}
}
} else {
kvs, err := db.getKVRange(nil, kStart, kEnd)
if err != nil {
return err
}
for _, kv := range kvs {
out <- &storage.KeyValue{storage.Key(kv[0]), []byte(kv[1])}
}
}
return nil
}
func TestTileKey(t *testing.T) {
datastore.OpenTest()
defer datastore.CloseTest()
uuid, _ := initTestRepo()
server.CreateTestInstance(t, uuid, "imagetile", "tiles", dvid.Config{})
keyURL := fmt.Sprintf("%snode/%s/tiles/tilekey/xy/0/1_2_3", server.WebAPIPath, uuid)
respStr := server.TestHTTP(t, "GET", keyURL, nil)
keyResp := struct {
Key string `json:"key"`
}{}
if err := json.Unmarshal(respStr, &keyResp); err != nil {
t.Fatalf("Couldn't parse JSON response to tilekey request (%v):\n%s\n", err, keyResp)
}
kb := make([]byte, hex.DecodedLen(len(keyResp.Key)))
_, err := hex.Decode(kb, []byte(keyResp.Key))
if err != nil {
t.Fatalf("Couldn't parse return hex key: %s", keyResp.Key)
}
// Decipher TKey portion to make sure it's correct.
key := storage.Key(kb)
tk, err := storage.TKeyFromKey(key)
if err != nil {
t.Fatalf("Couldn't get TKey from returned key (%v): %x", err, kb)
}
tile, plane, scale, err := DecodeTKey(tk)
if err != nil {
t.Fatalf("Bad decode of TKey (%v): %x", err, tk)
}
expectTile := dvid.ChunkPoint3d{1, 2, 3}
if tile != expectTile {
t.Errorf("Expected tile %v, got %v\n", expectTile, tile)
}
if !plane.Equals(dvid.XY) {
t.Errorf("Expected plane to be XY, got %v\n", plane)
}
if scale != 0 {
t.Errorf("Expected scale to be 0, got %d\n", scale)
}
}
func removeType(key storage.TKey) storage.Key {
return storage.Key(key)
}