Github user paul-rogers commented on a diff in the pull request:
https://github.com/apache/drill/pull/923#discussion_r136659980
--- Diff:
exec/java-exec/src/main/java/org/apache/drill/exec/server/options/SystemOptionManager.java
---
@@ -70,11 +69,13 @@
* </p>
*/
-public class SystemOptionManager extends BaseOptionManager implements
OptionManager, AutoCloseable {
+public class SystemOptionManager extends BaseOptionManager implements
AutoCloseable {
private static final org.slf4j.Logger logger =
org.slf4j.LoggerFactory.getLogger(SystemOptionManager.class);
- private CaseInsensitiveMap<OptionValidator> VALIDATORS;
- public void populateValidators() {
+ public static final CaseInsensitiveMap<OptionValidator>
DEFAULT_VALIDATORS =
--- End diff --
A compromise is to introduce a two-level table.
* Global table of option metadata. Perhaps evolve the validator to be that
metadata. Or, better, define a new `OptionDefinition` class, an attribute of
which is the validator.
* Per-Drillbit table of defaults resolved from the config system using the
information from the definitions.
If we do this, we should clean up all the messy enums in this system. The
current ones confuse everyone. We want:
* Definition: The allowed scope: session-only or both session and system.
* Visibility: public or hidden (this change)
* Data type: (long, double, string, etc.)
For a value:
* Scope: default, session or system.
Sometimes it is easier to fix the original problems than to keep working
around an outdated design...
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