Github user FredTing commented on a diff in the pull request: https://github.com/apache/flink/pull/5958#discussion_r186465223 --- Diff: flink-core/src/main/java/org/apache/flink/api/common/serialization/ConsumerRecordMetaInfo.java --- @@ -0,0 +1,73 @@ +/* + * 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.api.common.serialization; + +import org.apache.flink.annotation.Public; + +/** + * The consumer record meta info contains, besides the actual message, some meta information, such as + * key, topic, partition, offset and timestamp for Apache kafka + * + * <p><b>Note:</b>The timestamp is only valid for Kafka clients 0.10+, for older versions the value has the value `Long.MinValue` and + * the timestampType has the value `NO_TIMESTAMP_TYPE`. + */ +@Public +public interface ConsumerRecordMetaInfo { + /** + * The TimestampType is introduced in the kafka clients 0.10+. This interface is also used for the Kafka connector 0.9 + * so a local enumeration is needed. + */ + enum TimestampType { + NO_TIMESTAMP_TYPE, CREATE_TIME, INGEST_TIME --- End diff -- I'll rename them both.
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