fx19880617 commented on a change in pull request #6020:
URL: https://github.com/apache/incubator-pinot/pull/6020#discussion_r489717469
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File path:
pinot-controller/src/main/java/org/apache/pinot/controller/helix/core/listener/ClusterLiveInstanceChangeListener.java
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@@ -0,0 +1,34 @@
+package org.apache.pinot.controller.helix.core.listener;
+
+import java.util.ArrayList;
+import org.apache.helix.HelixDataAccessor;
+import org.apache.helix.NotificationContext;
+import org.apache.helix.api.listeners.LiveInstanceChangeListener;
+import org.apache.helix.model.LiveInstance;
+
+import java.util.List;
+import org.apache.helix.PropertyKey.Builder;
+
+
+public class ClusterLiveInstanceChangeListener implements
LiveInstanceChangeListener {
+ private HelixDataAccessor _helixDataAccessor;
+ private Builder _keyBuilder;
+ private List<LiveInstance> _liveInstances = new ArrayList<>();
+
+ public ClusterLiveInstanceChangeListener(HelixDataAccessor
helixDataAccessor, Builder keyBuilder) {
+ _helixDataAccessor = helixDataAccessor;
+ _keyBuilder = keyBuilder;
+ }
+
+ @Override
+ public void onLiveInstanceChange(List<LiveInstance> liveInstances,
NotificationContext changeContext) {
+ _liveInstances = liveInstances;
Review comment:
_liveInstances =
_helixDataAccessor.getProperty(_keyBuilder.liveInstances());
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