xyuanlu commented on code in PR #2249: URL: https://github.com/apache/helix/pull/2249#discussion_r1026982587
########## meta-client/src/main/java/org/apache/helix/metaclient/api/DirectChildChangeListener.java: ########## @@ -0,0 +1,36 @@ +package org.apache.helix.metaclient.api; + +/* + * Licensed to the Apache Software Foundation (ASF) under one + * or more contributor license agreements. See the NOTICE file + * distributed with this work for additional information + * regarding copyright ownership. The ASF licenses this file + * to you under the Apache License, Version 2.0 (the + * "License"); you may not use this file except in compliance + * with the License. You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, + * software distributed under the License is distributed on an + * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY + * KIND, either express or implied. See the License for the + * specific language governing permissions and limitations + * under the License. + */ + +/** + * Listener interface for direct child change event on a particular key. It includes new + * child creation or child deletion. The callback won't differentiate these types. + * For hierarchy key spaces like zookeeper, it refers to an entry's direct child nodes. + * For flat key spaces, it refers to keys that matches `prefix*separator`. + */ +public interface DirectChildChangeListener { + /** + * Called when there is a direct child entry creation or deleted. + * @param key The parent key where child change listener is subscribed. Review Comment: TFTR. It is the parent key where the listener is registered. -- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. To unsubscribe, e-mail: [email protected] For queries about this service, please contact Infrastructure at: [email protected] --------------------------------------------------------------------- To unsubscribe, e-mail: [email protected] For additional commands, e-mail: [email protected]
