maytasm commented on a change in pull request #11601:
URL: https://github.com/apache/druid/pull/11601#discussion_r690338917
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File path: docs/development/modules.md
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@@ -324,6 +324,28 @@ public class MyTransformModule implements DruidModule {
}
```
+### Adding your own custom pluggable Coordinator Duty
+
+The coordinator periodically runs jobs, so-called `CoordinatorDuty` which
include loading new segments, segment balancing, etc.
+Druid users can add custom pluggable coordinator duties, which are not part of
Core Druid, without modifying any Core Druid classes.
+Users can do this by writing their own custom coordinator duty implementing
the interface `CoordinatorCustomDuty` and setting the `JsonTypeName`.
+Next, users will need to register their custom coordinator as subtypes in
their Module's `DruidModule#getJacksonModules()`.
+Once these steps are done, user will be able to load their custom coordinator
duty using the following properties:
+```
+druid.coordinator.dutyGroups=[<GROUP_NAME_1>, <GROUP_NAME_2>, ...]
+druid.coordinator.<GROUP_NAME_1>.duties=[<DUTY_NAME_MATCHING_JSON_TYPE_NAME_1>,
<DUTY_NAME_MATCHING_JSON_TYPE_NAME_2>, ...]
+druid.coordinator.<GROUP_NAME_1>.duty.<DUTY_NAME_MATCHING_JSON_TYPE_NAME_1>.<SOME_CONFIG_1_KEY>=<SOME_CONFIG_1_VALUE>
+druid.coordinator.<GROUP_NAME_1>.duty.<DUTY_NAME_MATCHING_JSON_TYPE_NAME_1>.<SOME_CONFIG_2_KEY>=<SOME_CONFIG_2_VALUE>
+druid.coordinator.<GROUP_NAME_1>.period=<GROUP_NAME_1_RUN_PERIOD>
Review comment:
Done
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