kaisun2000 commented on a change in pull request #1035:
URL: https://github.com/apache/helix/pull/1035#discussion_r435018962
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File path:
zookeeper-api/src/main/java/org/apache/helix/zookeeper/api/client/RealmAwareZkClient.java
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@@ -69,12 +69,49 @@
int DEFAULT_SESSION_TIMEOUT = 30 * 1000;
// listener subscription
+ /**
+ * Subscribe the path and the listener will handle child events of the path.
+ * Add exists watch to path if the path does not exist in ZooKeeper server.
+ * WARNING: if the path is created after deletion, users need to
re-subscribe the path
+ * @param path The zookeeper path
+ * @param listener Instance of {@link IZkDataListener}
+ * The method return null if the path does not exists. Otherwise, return a
list of children
+ * under the path. The list can be empty if there is no children.
+ */
List<String> subscribeChildChanges(String path, IZkChildListener listener);
Review comment:
done.
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