tweise commented on a change in pull request #15924: URL: https://github.com/apache/flink/pull/15924#discussion_r640184455
########## File path: flink-connectors/flink-connector-base/src/main/java/org/apache/flink/connector/base/source/hybrid/HybridSourceReader.java ########## @@ -0,0 +1,201 @@ +/* + * 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.connector.base.source.hybrid; + +import org.apache.flink.api.connector.source.ReaderOutput; +import org.apache.flink.api.connector.source.SourceEvent; +import org.apache.flink.api.connector.source.SourceReader; +import org.apache.flink.api.connector.source.SourceReaderContext; +import org.apache.flink.api.connector.source.SourceSplit; +import org.apache.flink.core.io.InputStatus; +import org.apache.flink.util.Preconditions; + +import org.slf4j.Logger; +import org.slf4j.LoggerFactory; + +import java.util.ArrayList; +import java.util.List; +import java.util.concurrent.CompletableFuture; + +/** Hybrid source reader that delegates to the actual current source reader. */ +public class HybridSourceReader<T, SplitT extends SourceSplit> + implements SourceReader<T, HybridSourceSplit<SplitT>> { + private static final Logger LOG = LoggerFactory.getLogger(HybridSourceReader.class); + private static final int SOURCE_READER_FINISHED_EVENT_DELAY = 250; Review comment: This is used within poll. I added the delay after I realized that too many events were generated. The reason for that is that the reader converts the underlying `END_OF_INPUT` to `MORE_AVAILABLE`. But more input will only be available after the reader was switched. I will check if this issue would go away when using `NOTHING_AVAILABLE` instead. -- 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. For queries about this service, please contact Infrastructure at: [email protected]
