klsince commented on code in PR #12440:
URL: https://github.com/apache/pinot/pull/12440#discussion_r1576653550
##########
pinot-spi/src/main/java/org/apache/pinot/spi/env/CommonsConfigurationUtils.java:
##########
@@ -43,28 +46,16 @@
*/
public class CommonsConfigurationUtils {
private static final Character DEFAULT_LIST_DELIMITER = ',';
+ public static final String VERSION_HEADER_IDENTIFIER = "version";
- private CommonsConfigurationUtils() {
- }
+ // usage: default header version of all configurations.
+ // if properties configuration doesn't contain header version, it will be
considered as 1
+ public static final String PROPERTIES_CONFIGURATION_HEADER_VERSION_1 = "1";
Review Comment:
I don't think we need "1" and can use `null` if there is no header from
segment metadata file.
How about name the constant below `SEGMENT_METADATA_FILE_FORMAT_VERSION =
1`, and leave some comments about what the new format would be like.
```
public static final String PROPERTIES_CONFIGURATION_HEADER_VERSION_2 = "2";
```
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