zhangmeng916 commented on a change in pull request #851: Modify Helix generic
controller to include new stage for customized view aggregation
URL: https://github.com/apache/helix/pull/851#discussion_r398115507
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File path:
helix-core/src/main/java/org/apache/helix/controller/GenericHelixController.java
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@@ -813,23 +817,36 @@ public void onStateChange(String instanceName,
List<CurrentState> statesInfo,
@Override
@PreFetch(enabled = false)
- public void onCustomizedStateRootChange(String instanceName,
NotificationContext changeContext) {
+ public void onCustomizedStateRootChange(String instanceName, List<String>
customizedStateTypes,
+ NotificationContext changeContext) {
logger.info("START:
GenericClusterController.onCustomizedStateRootChange()");
- notifyCaches(changeContext, ChangeType.CUSTOMIZED_STATE_ROOT);
HelixManager manager = changeContext.getManager();
- List<String> customizedStateTypes =
- manager.getHelixDataAccessor().getChildNames(
-
manager.getHelixDataAccessor().keyBuilder().customizedStatesRoot(instanceName));
+ Builder keyBuilder = new Builder(manager.getClusterName());
- for (String customizedState : customizedStateTypes) {
- try {
- manager.addCustomizedStateChangeListener(this, instanceName,
customizedState);
- logger.info(
- manager.getInstanceName() + " added customized state listener for
" + instanceName
- + ", listener: " + this);
- } catch (Exception e) {
- logger.error("Fail to add customized state listener for instance: " +
instanceName, e);
+ synchronized (_lastSeenCustomizedStateTypes) {
+ Set<String> lastSeenCustomizedStateTypes =
_lastSeenCustomizedStateTypes.get();
Review comment:
I saw a todo here:
// TODO: remove the synchronization here once we move this update into
dataCache.
synchronized (_lastSeenInstances) {
I'm not sure whether there's any pending task for this that could also apply
here, so I kept it.
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