MonsterChenzhuo commented on code in PR #4923: URL: https://github.com/apache/seatunnel/pull/4923#discussion_r1257811161
########## seatunnel-connectors-v2/connector-cdc/connector-cdc-mongodb/src/main/java/org/apache/seatunnel/connectors/seatunnel/cdc/mongodb/sender/MongoDBConnectorDeserializationSchema.java: ########## @@ -0,0 +1,558 @@ +/* + * 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.seatunnel.connectors.seatunnel.cdc.mongodb.sender; + +import org.apache.seatunnel.api.source.Collector; +import org.apache.seatunnel.api.table.type.ArrayType; +import org.apache.seatunnel.api.table.type.DecimalType; +import org.apache.seatunnel.api.table.type.MapType; +import org.apache.seatunnel.api.table.type.RowKind; +import org.apache.seatunnel.api.table.type.SeaTunnelDataType; +import org.apache.seatunnel.api.table.type.SeaTunnelRow; +import org.apache.seatunnel.api.table.type.SeaTunnelRowType; +import org.apache.seatunnel.api.table.type.SqlType; +import org.apache.seatunnel.connectors.cdc.debezium.DebeziumDeserializationSchema; +import org.apache.seatunnel.connectors.seatunnel.cdc.mongodb.exception.MongodbConnectorException; + +import org.apache.kafka.connect.data.Schema; +import org.apache.kafka.connect.data.Struct; +import org.apache.kafka.connect.source.SourceRecord; + +import org.bson.BsonDocument; +import org.bson.BsonType; +import org.bson.BsonValue; +import org.bson.json.JsonMode; +import org.bson.json.JsonWriterSettings; +import org.bson.types.Decimal128; +import org.jetbrains.annotations.Contract; +import org.jetbrains.annotations.NotNull; +import org.jetbrains.annotations.Nullable; + +import com.mongodb.client.model.changestream.OperationType; + +import java.io.Serializable; +import java.lang.reflect.Array; +import java.math.BigDecimal; +import java.math.RoundingMode; +import java.sql.Timestamp; +import java.time.Instant; +import java.time.LocalDateTime; +import java.util.Arrays; +import java.util.HashMap; +import java.util.List; +import java.util.Map; +import java.util.Objects; + +import static org.apache.seatunnel.common.exception.CommonErrorCode.ILLEGAL_ARGUMENT; +import static org.apache.seatunnel.common.exception.CommonErrorCode.UNSUPPORTED_DATA_TYPE; +import static org.apache.seatunnel.common.exception.CommonErrorCode.UNSUPPORTED_OPERATION; +import static org.apache.seatunnel.connectors.seatunnel.cdc.mongodb.config.MongodbSourceOptions.DEFAULT_JSON_WRITER_SETTINGS; +import static org.apache.seatunnel.connectors.seatunnel.cdc.mongodb.config.MongodbSourceOptions.DOCUMENT_KEY; +import static org.apache.seatunnel.connectors.seatunnel.cdc.mongodb.config.MongodbSourceOptions.ENCODE_VALUE_FIELD; +import static org.apache.seatunnel.connectors.seatunnel.cdc.mongodb.config.MongodbSourceOptions.FULL_DOCUMENT; +import static org.apache.seatunnel.connectors.seatunnel.cdc.mongodb.config.MongodbSourceOptions.ID_FIELD; +import static org.apache.seatunnel.shade.com.google.common.base.Preconditions.checkNotNull; + +public class MongoDBConnectorDeserializationSchema + implements DebeziumDeserializationSchema<SeaTunnelRow> { + + private final SeaTunnelDataType<SeaTunnelRow> resultTypeInfo; + + private final DeserializationRuntimeConverter physicalConverter; + + public MongoDBConnectorDeserializationSchema( + SeaTunnelDataType<SeaTunnelRow> physicalDataType, + SeaTunnelDataType<SeaTunnelRow> resultTypeInfo) { + this.physicalConverter = createConverter(physicalDataType); + this.resultTypeInfo = resultTypeInfo; + } + + @Override + public void deserialize(@NotNull SourceRecord record, Collector<SeaTunnelRow> out) { + Struct value = (Struct) record.value(); + Schema valueSchema = record.valueSchema(); + + OperationType op = operationTypeFor(record); + BsonDocument documentKey = + checkNotNull( + Objects.requireNonNull( + extractBsonDocument(value, valueSchema, DOCUMENT_KEY))); + BsonDocument fullDocument = extractBsonDocument(value, valueSchema, FULL_DOCUMENT); + + switch (op) { + case INSERT: + SeaTunnelRow insert = extractRowData(fullDocument); + insert.setRowKind(RowKind.INSERT); + emit(record, insert, out); + break; + case DELETE: + SeaTunnelRow delete = + new SeaTunnelRow( + new Object[] { + documentKey.get(ID_FIELD).asObjectId().getValue().toString() + }); + delete.setRowKind(RowKind.DELETE); + emit(record, delete, out); + break; + case UPDATE: + if (fullDocument == null) { + break; + } + SeaTunnelRow updateAfter = extractRowData(fullDocument); + updateAfter.setRowKind(RowKind.UPDATE_AFTER); + emit(record, updateAfter, out); + break; + case REPLACE: + SeaTunnelRow replaceAfter = extractRowData(fullDocument); + replaceAfter.setRowKind(RowKind.UPDATE_AFTER); + emit(record, replaceAfter, out); + break; + case INVALIDATE: + case DROP: + case DROP_DATABASE: + case RENAME: + case OTHER: + default: + break; + } + } + + @Override + public SeaTunnelDataType<SeaTunnelRow> getProducedType() { + return resultTypeInfo; + } + + private @NotNull OperationType operationTypeFor(@NotNull SourceRecord record) { + Struct value = (Struct) record.value(); + return OperationType.fromString(value.getString("operationType")); + } + + // TODO:The dynamic schema will be completed based on this method later. + private void emit( + SourceRecord inRecord, + SeaTunnelRow physicalRow, + @NotNull Collector<SeaTunnelRow> collector) { + collector.collect(physicalRow); + } + + private SeaTunnelRow extractRowData(BsonDocument document) { + checkNotNull(document); + return (SeaTunnelRow) physicalConverter.convert(document); + } + + private BsonDocument extractBsonDocument( + Struct value, @NotNull Schema valueSchema, String fieldName) { + if (valueSchema.field(fieldName) != null) { + String docString = value.getString(fieldName); + if (docString != null) { + return BsonDocument.parse(docString); + } + } + return null; + } + + // ------------------------------------------------------------------------------------- + // Runtime Converters + // ------------------------------------------------------------------------------------- + + @FunctionalInterface + public interface DeserializationRuntimeConverter extends Serializable { + Object convert(BsonValue bsonValue); + } + + public DeserializationRuntimeConverter createConverter(SeaTunnelDataType<?> type) { + SerializableFunction<BsonValue, Object> internalRowConverter = + createNullSafeInternalConverter(type); + return new DeserializationRuntimeConverter() { + private static final long serialVersionUID = 1L; + + @Override + public Object convert(BsonValue bsonValue) { + return internalRowConverter.apply(bsonValue); + } + }; + } + + @Contract("_ -> new") Review Comment: Oh, okay. the original intention of writing is that I think this kind of annotation will provide better code quality. -- This is an automated message from the Apache Git Service. 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