danny0405 commented on code in PR #13242: URL: https://github.com/apache/hudi/pull/13242#discussion_r2074479873
########## hudi-common/src/main/java/org/apache/hudi/common/table/read/EngineBasedMerger.java: ########## @@ -0,0 +1,194 @@ +/* + * 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.hudi.common.table.read; + +import org.apache.hudi.avro.AvroSchemaCache; +import org.apache.hudi.common.config.RecordMergeMode; +import org.apache.hudi.common.config.TypedProperties; +import org.apache.hudi.common.engine.HoodieReaderContext; +import org.apache.hudi.common.model.DefaultHoodieRecordPayload; +import org.apache.hudi.common.model.HoodieAvroRecord; +import org.apache.hudi.common.model.HoodieKey; +import org.apache.hudi.common.model.HoodieRecord; +import org.apache.hudi.common.model.HoodieRecordMerger; +import org.apache.hudi.common.model.OverwriteWithLatestAvroPayload; +import org.apache.hudi.common.table.HoodieTableConfig; +import org.apache.hudi.common.util.HoodieRecordUtils; +import org.apache.hudi.common.util.Option; +import org.apache.hudi.common.util.ValidationUtils; +import org.apache.hudi.common.util.collection.Pair; + +import org.apache.avro.Schema; +import org.apache.avro.generic.GenericRecord; +import org.apache.avro.generic.IndexedRecord; + +import java.io.IOException; +import java.util.Objects; + +import static org.apache.hudi.common.model.HoodieRecordMerger.PAYLOAD_BASED_MERGE_STRATEGY_UUID; + +/** + * Handles the logic for merging two records in an engine agnostic way. This allows the Hudi project to consolidate the merging logic and avoid deviation between engines. + * The class takes in {@link HoodieReaderContext<T>} for the engine specific operations such as fetching the value representing the event time when {@link RecordMergeMode#EVENT_TIME_ORDERING} is used. + * @param <T> The type of the engine's row + */ +public class EngineBasedMerger<T> { Review Comment: We already have `RecordMerger` abstraction, maybe we rename it as `MergeEngine` or something? -- 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]
