JingsongLi commented on code in PR #896: URL: https://github.com/apache/incubator-paimon/pull/896#discussion_r1165223518
########## paimon-flink/paimon-flink-common/src/main/java/org/apache/paimon/flink/sink/cdc/FlinkCdcSyncDatabaseSinkBuilder.java: ########## @@ -0,0 +1,122 @@ +/* + * 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.paimon.flink.sink.cdc; + +import org.apache.paimon.flink.sink.BucketingStreamPartitioner; +import org.apache.paimon.flink.utils.SingleOutputStreamOperatorUtils; +import org.apache.paimon.operation.Lock; +import org.apache.paimon.schema.SchemaManager; +import org.apache.paimon.table.FileStoreTable; +import org.apache.paimon.utils.Preconditions; + +import org.apache.flink.streaming.api.datastream.DataStream; +import org.apache.flink.streaming.api.datastream.SingleOutputStreamOperator; +import org.apache.flink.streaming.api.environment.StreamExecutionEnvironment; +import org.apache.flink.streaming.api.transformations.PartitionTransformation; + +import javax.annotation.Nullable; + +import java.util.ArrayList; +import java.util.List; + +/** + * Builder for {@link FlinkCdcSink} when syncing the whole database into one Paimon database. Each + * database table will be written into a separate Paimon table. + * + * <p>This builder will create a separate sink for each Paimon sink table. Thus this implementation + * is not very efficient in resource saving. + * + * @param <T> CDC change event type + */ +public class FlinkCdcSyncDatabaseSinkBuilder<T> { + + private DataStream<T> input = null; + private EventParser.Factory<T> parserFactory = null; + private List<FileStoreTable> tables = new ArrayList<>(); + private Lock.Factory lockFactory = Lock.emptyFactory(); + + @Nullable private Integer parallelism; + + public FlinkCdcSyncDatabaseSinkBuilder<T> withInput(DataStream<T> input) { + this.input = input; + return this; + } + + public FlinkCdcSyncDatabaseSinkBuilder<T> withParserFactory( + EventParser.Factory<T> parserFactory) { + this.parserFactory = parserFactory; + return this; + } + + public FlinkCdcSyncDatabaseSinkBuilder<T> withTables(List<FileStoreTable> tables) { + this.tables = tables; + return this; + } + + public FlinkCdcSyncDatabaseSinkBuilder<T> withLockFactory(Lock.Factory lockFactory) { + this.lockFactory = lockFactory; + return this; + } + + public FlinkCdcSyncDatabaseSinkBuilder<T> withParallelism(@Nullable Integer parallelism) { + this.parallelism = parallelism; + return this; + } + + public void build() { + Preconditions.checkNotNull(input); + Preconditions.checkNotNull(parserFactory); + + StreamExecutionEnvironment env = input.getExecutionEnvironment(); + + SingleOutputStreamOperator<Void> parsed = + input.forward() + .process(new CdcMultiTableParsingProcessFunction<>(parserFactory)) + .setParallelism(input.getParallelism()); + + for (FileStoreTable table : tables) { + DataStream<Void> schemaChangeProcessFunction = + SingleOutputStreamOperatorUtils.getSideOutput( + parsed, + CdcMultiTableParsingProcessFunction.createSchemaChangeOutputTag( + table.name())) + .process( + new SchemaChangeProcessFunction( + new SchemaManager(table.fileIO(), table.location()))); + schemaChangeProcessFunction.getTransformation().setParallelism(1); Review Comment: `setMaxParallelism` too. Modify `FlinkCdcSinkBuilder` too. -- 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]
