WencongLiu commented on code in PR #24422: URL: https://github.com/apache/flink/pull/24422#discussion_r1527976069
########## flink-process-function-parent/flink-process-function-api/src/main/java/org/apache/flink/process/api/function/ProcessFunction.java: ########## @@ -0,0 +1,50 @@ +/* + * 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. + */ + +package org.apache.flink.process.api.function; + +import org.apache.flink.annotation.Experimental; +import org.apache.flink.api.common.functions.Function; + +/** Base class for all user defined process functions. */ +@Experimental +public interface ProcessFunction extends Function { + /** + * Initialization method for the function. It is called before the actual working methods (like + * processRecord) and thus suitable for one time setup work. + * + * <p>By default, this method does nothing. + * + * @throws Exception Implementations may forward exceptions, which are caught by the runtime. + * When the runtime catches an exception, it aborts the task and lets the fail-over logic + * decide whether to retry the task execution. + */ + default void open() throws Exception {} Review Comment: Alright, if there is a need to add new parameters to the open method, we can do so when it's actually required, as all the newly added classes are currently at the @Experimental level. -- 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: issues-unsubscr...@flink.apache.org For queries about this service, please contact Infrastructure at: us...@infra.apache.org
