hailin0 commented on code in PR #7463: URL: https://github.com/apache/seatunnel/pull/7463#discussion_r1838331005
########## seatunnel-connectors-v2/connector-cdc/connector-cdc-base/src/main/java/org/apache/seatunnel/connectors/cdc/debezium/ConnectTableChangeSerializer.java: ########## @@ -0,0 +1,233 @@ +/* + * 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.cdc.debezium; + +import org.apache.kafka.connect.data.Schema; +import org.apache.kafka.connect.data.SchemaBuilder; +import org.apache.kafka.connect.data.Struct; + +import io.debezium.relational.Column; +import io.debezium.relational.ColumnEditor; +import io.debezium.relational.Table; +import io.debezium.relational.TableId; +import io.debezium.relational.history.TableChanges; +import io.debezium.util.SchemaNameAdjuster; + +import java.io.Serializable; +import java.util.List; +import java.util.stream.Collectors; +import java.util.stream.StreamSupport; + +import static io.debezium.relational.history.ConnectTableChangeSerializer.AUTO_INCREMENTED_KEY; +import static io.debezium.relational.history.ConnectTableChangeSerializer.CHARSET_NAME_KEY; +import static io.debezium.relational.history.ConnectTableChangeSerializer.COLUMNS_KEY; +import static io.debezium.relational.history.ConnectTableChangeSerializer.COMMENT_KEY; +import static io.debezium.relational.history.ConnectTableChangeSerializer.DEFAULT_CHARSET_NAME_KEY; +import static io.debezium.relational.history.ConnectTableChangeSerializer.GENERATED_KEY; +import static io.debezium.relational.history.ConnectTableChangeSerializer.ID_KEY; +import static io.debezium.relational.history.ConnectTableChangeSerializer.JDBC_TYPE_KEY; +import static io.debezium.relational.history.ConnectTableChangeSerializer.LENGTH_KEY; +import static io.debezium.relational.history.ConnectTableChangeSerializer.NAME_KEY; +import static io.debezium.relational.history.ConnectTableChangeSerializer.NATIVE_TYPE_KEY; +import static io.debezium.relational.history.ConnectTableChangeSerializer.OPTIONAL_KEY; +import static io.debezium.relational.history.ConnectTableChangeSerializer.POSITION_KEY; +import static io.debezium.relational.history.ConnectTableChangeSerializer.PRIMARY_KEY_COLUMN_NAMES_KEY; +import static io.debezium.relational.history.ConnectTableChangeSerializer.SCALE_KEY; +import static io.debezium.relational.history.ConnectTableChangeSerializer.TABLE_KEY; +import static io.debezium.relational.history.ConnectTableChangeSerializer.TYPE_EXPRESSION_KEY; +import static io.debezium.relational.history.ConnectTableChangeSerializer.TYPE_KEY; +import static io.debezium.relational.history.ConnectTableChangeSerializer.TYPE_NAME_KEY; + +/** + * A serializer for {@link TableChanges} that deserialize the table list of {@link Struct} into a + * {@link TableChanges}. This class is used to deserialize the checkpoint data into {@link + * TableChanges}. + */ +public class ConnectTableChangeSerializer + implements TableChanges.TableChangesSerializer<List<Struct>>, Serializable { + private static final String ENUM_VALUES_KEY = "enumValues"; + private static final SchemaNameAdjuster SCHEMA_NAME_ADJUSTER = SchemaNameAdjuster.create(); + + private static final Schema COLUMN_SCHEMA = + SchemaBuilder.struct() + .name(SCHEMA_NAME_ADJUSTER.adjust("io.debezium.connector.schema.Column")) + .field(NAME_KEY, Schema.STRING_SCHEMA) + .field(JDBC_TYPE_KEY, Schema.INT32_SCHEMA) + .field(NATIVE_TYPE_KEY, Schema.OPTIONAL_INT32_SCHEMA) + .field(TYPE_NAME_KEY, Schema.STRING_SCHEMA) + .field(TYPE_EXPRESSION_KEY, Schema.OPTIONAL_STRING_SCHEMA) + .field(CHARSET_NAME_KEY, Schema.OPTIONAL_STRING_SCHEMA) + .field(LENGTH_KEY, Schema.OPTIONAL_INT32_SCHEMA) + .field(SCALE_KEY, Schema.OPTIONAL_INT32_SCHEMA) + .field(POSITION_KEY, Schema.INT32_SCHEMA) + .field(OPTIONAL_KEY, Schema.OPTIONAL_BOOLEAN_SCHEMA) + .field(AUTO_INCREMENTED_KEY, Schema.OPTIONAL_BOOLEAN_SCHEMA) + .field(GENERATED_KEY, Schema.OPTIONAL_BOOLEAN_SCHEMA) + .field(COMMENT_KEY, Schema.OPTIONAL_STRING_SCHEMA) + .field( + ENUM_VALUES_KEY, + SchemaBuilder.array(Schema.STRING_SCHEMA).optional().build()) + .build(); + + public static final Schema TABLE_SCHEMA = + SchemaBuilder.struct() + .name(SCHEMA_NAME_ADJUSTER.adjust("io.debezium.connector.schema.Table")) + .field(DEFAULT_CHARSET_NAME_KEY, Schema.OPTIONAL_STRING_SCHEMA) + .field( + PRIMARY_KEY_COLUMN_NAMES_KEY, + SchemaBuilder.array(Schema.STRING_SCHEMA).optional().build()) + .field(COLUMNS_KEY, SchemaBuilder.array(COLUMN_SCHEMA).build()) + .field(COMMENT_KEY, Schema.OPTIONAL_STRING_SCHEMA) + .build(); + + public static final Schema CHANGE_SCHEMA = + SchemaBuilder.struct() + .name(SCHEMA_NAME_ADJUSTER.adjust("io.debezium.connector.schema.Change")) + .field(TYPE_KEY, Schema.STRING_SCHEMA) + .field(ID_KEY, Schema.STRING_SCHEMA) + .field(TABLE_KEY, TABLE_SCHEMA) + .build(); + + @Override + public List<Struct> serialize(TableChanges tableChanges) { + return StreamSupport.stream(tableChanges.spliterator(), false) + .map(this::toStruct) + .collect(Collectors.toList()); + } + + @Override + public TableChanges deserialize(List<Struct> data, boolean useCatalogBeforeSchema) { + TableChanges tableChanges = new TableChanges(); + for (Struct struct : data) { + String tableId = struct.getString(ID_KEY); + TableChanges.TableChangeType changeType = + TableChanges.TableChangeType.valueOf(struct.getString(TYPE_KEY)); + Table table = toTable(struct.getStruct(TABLE_KEY), TableId.parse(tableId)); + switch (changeType) { + case CREATE: + tableChanges.create(table); + break; + case DROP: + tableChanges.drop(table); + break; + case ALTER: + tableChanges.alter(table); + break; + default: + throw new IllegalArgumentException("Unknown table change type: " + changeType); + } + } + return tableChanges; + } + + public Table toTable(Struct struct, TableId tableId) { + return Table.editor() + .tableId(tableId) + .setDefaultCharsetName(struct.getString(DEFAULT_CHARSET_NAME_KEY)) + .setPrimaryKeyNames(struct.getArray(PRIMARY_KEY_COLUMN_NAMES_KEY)) + .setColumns( + struct.getArray(COLUMNS_KEY).stream() + .map(Struct.class::cast) + .map(this::toColumn) + .collect(Collectors.toList())) + .create(); + } + + private Column toColumn(Struct struct) { + ColumnEditor editor = + Column.editor() + .name(struct.getString(NAME_KEY)) + .jdbcType(struct.getInt32(JDBC_TYPE_KEY)) + .type( + struct.getString(TYPE_NAME_KEY), + struct.getString(TYPE_EXPRESSION_KEY)) + .charsetName(struct.getString(CHARSET_NAME_KEY)) + .position(struct.getInt32(POSITION_KEY)) + .optional(struct.getBoolean(OPTIONAL_KEY)) + .autoIncremented(struct.getBoolean(AUTO_INCREMENTED_KEY)) + .generated(struct.getBoolean(GENERATED_KEY)); + if (struct.get(NATIVE_TYPE_KEY) != null) { + editor.nativeType(struct.getInt32(NATIVE_TYPE_KEY)); + } + if (struct.get(LENGTH_KEY) != null) { + editor.length(struct.getInt32(LENGTH_KEY)); + } + if (struct.get(SCALE_KEY) != null) { + editor.scale(struct.getInt32(SCALE_KEY)); + } + if (struct.get(COMMENT_KEY) != null) { + editor.comment(struct.getString(COMMENT_KEY)); + } + if (struct.get(ENUM_VALUES_KEY) != null) { + editor.enumValues(struct.getArray(ENUM_VALUES_KEY)); Review Comment: close #8030 -- This is an automated message from the Apache Git Service. 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