linjianchang commented on code in PR #3995: URL: https://github.com/apache/flink-cdc/pull/3995#discussion_r2610495729
########## flink-cdc-connect/flink-cdc-pipeline-connectors/flink-cdc-pipeline-connector-oracle/src/main/java/org/apache/flink/cdc/connectors/oracle/source/reader/OraclePipelineRecordEmitter.java: ########## @@ -0,0 +1,91 @@ +/* + * 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.cdc.connectors.oracle.source.reader; + +import org.apache.flink.api.connector.source.SourceOutput; +import org.apache.flink.cdc.common.event.CreateTableEvent; +import org.apache.flink.cdc.common.schema.Schema; +import org.apache.flink.cdc.connectors.base.source.meta.offset.OffsetFactory; +import org.apache.flink.cdc.connectors.base.source.meta.split.SourceSplitState; +import org.apache.flink.cdc.connectors.base.source.metrics.SourceReaderMetrics; +import org.apache.flink.cdc.connectors.base.source.reader.IncrementalSourceRecordEmitter; +import org.apache.flink.cdc.connectors.oracle.source.config.OracleSourceConfig; +import org.apache.flink.cdc.connectors.oracle.utils.OracleSchemaUtils; +import org.apache.flink.cdc.debezium.DebeziumDeserializationSchema; +import org.apache.flink.connector.base.source.reader.RecordEmitter; + +import io.debezium.jdbc.JdbcConnection; +import io.debezium.relational.TableId; +import org.apache.kafka.connect.source.SourceRecord; + +import java.sql.SQLException; +import java.util.ArrayList; +import java.util.List; +import java.util.Locale; + +/** The {@link RecordEmitter} implementation for Oracle pipeline connector. */ +public class OraclePipelineRecordEmitter<T> extends IncrementalSourceRecordEmitter<T> { + private static final long serialVersionUID = 1L; + private List<String> tableList; + private List<CreateTableEvent> createTableEventCache = null; + private boolean alreadySendCreateTableForBinlogSplit = false; + + public OraclePipelineRecordEmitter( + DebeziumDeserializationSchema<T> debeziumDeserializationSchema, + SourceReaderMetrics sourceReaderMetrics, + boolean includeSchemaChanges, + OffsetFactory offsetFactory, + OracleSourceConfig sourceConfig) { + super( + debeziumDeserializationSchema, + sourceReaderMetrics, + includeSchemaChanges, + offsetFactory); + this.tableList = sourceConfig.getTableList(); + this.createTableEventCache = new ArrayList<>(); + try (JdbcConnection jdbc = OracleSchemaUtils.createOracleConnection(sourceConfig)) { + + List<TableId> capturedTableIds = new ArrayList<>(); + for (String table : tableList) { + TableId capturedTableId = TableId.parse(table.toUpperCase(Locale.ROOT)); + capturedTableIds.add(capturedTableId); + } + for (TableId tableId : capturedTableIds) { + Schema schema = OracleSchemaUtils.getSchema(jdbc, tableId); + createTableEventCache.add( + new CreateTableEvent( + org.apache.flink.cdc.common.event.TableId.tableId( + tableId.catalog(), tableId.table()), + schema)); + } + } catch (SQLException e) { + throw new RuntimeException("Cannot start emitter to fetch table schema.", e); + } + } + + @Override + protected void processElement( + SourceRecord element, SourceOutput<T> output, SourceSplitState splitState) + throws Exception { Review Comment: > Read the pg emitter code carefully before implementing this feature. Aleady implemented -- 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]
