rodmeneses commented on code in PR #10179: URL: https://github.com/apache/iceberg/pull/10179#discussion_r1715599893
########## flink/v1.19/flink/src/main/java/org/apache/iceberg/flink/sink/IcebergSink.java: ########## @@ -0,0 +1,811 @@ +/* + * 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.iceberg.flink.sink; + +import static org.apache.iceberg.TableProperties.AVRO_COMPRESSION; +import static org.apache.iceberg.TableProperties.AVRO_COMPRESSION_LEVEL; +import static org.apache.iceberg.TableProperties.ORC_COMPRESSION; +import static org.apache.iceberg.TableProperties.ORC_COMPRESSION_STRATEGY; +import static org.apache.iceberg.TableProperties.PARQUET_COMPRESSION; +import static org.apache.iceberg.TableProperties.PARQUET_COMPRESSION_LEVEL; +import static org.apache.iceberg.TableProperties.WRITE_DISTRIBUTION_MODE; + +import java.io.IOException; +import java.io.UncheckedIOException; +import java.time.Duration; +import java.util.List; +import java.util.Map; +import java.util.Optional; +import java.util.Set; +import java.util.UUID; +import java.util.function.Function; +import org.apache.flink.annotation.Experimental; +import org.apache.flink.api.common.functions.MapFunction; +import org.apache.flink.api.common.typeinfo.TypeInformation; +import org.apache.flink.api.connector.sink2.Committer; +import org.apache.flink.api.connector.sink2.CommitterInitContext; +import org.apache.flink.api.connector.sink2.Sink; +import org.apache.flink.api.connector.sink2.SinkWriter; +import org.apache.flink.api.connector.sink2.SupportsCommitter; +import org.apache.flink.configuration.Configuration; +import org.apache.flink.configuration.ReadableConfig; +import org.apache.flink.core.io.SimpleVersionedSerializer; +import org.apache.flink.streaming.api.connector.sink2.CommittableMessage; +import org.apache.flink.streaming.api.connector.sink2.CommittableMessageTypeInfo; +import org.apache.flink.streaming.api.connector.sink2.SupportsPostCommitTopology; +import org.apache.flink.streaming.api.connector.sink2.SupportsPreCommitTopology; +import org.apache.flink.streaming.api.connector.sink2.SupportsPreWriteTopology; +import org.apache.flink.streaming.api.datastream.DataStream; +import org.apache.flink.streaming.api.datastream.DataStreamSink; +import org.apache.flink.streaming.api.datastream.SingleOutputStreamOperator; +import org.apache.flink.table.api.TableSchema; +import org.apache.flink.table.data.RowData; +import org.apache.flink.table.data.util.DataFormatConverters; +import org.apache.flink.table.types.DataType; +import org.apache.flink.table.types.logical.RowType; +import org.apache.flink.types.Row; +import org.apache.flink.util.Preconditions; +import org.apache.iceberg.DataFile; +import org.apache.iceberg.DistributionMode; +import org.apache.iceberg.FileFormat; +import org.apache.iceberg.PartitionField; +import org.apache.iceberg.PartitionSpec; +import org.apache.iceberg.Schema; +import org.apache.iceberg.SerializableTable; +import org.apache.iceberg.Table; +import org.apache.iceberg.flink.FlinkSchemaUtil; +import org.apache.iceberg.flink.FlinkWriteConf; +import org.apache.iceberg.flink.FlinkWriteOptions; +import org.apache.iceberg.flink.TableLoader; +import org.apache.iceberg.flink.sink.committer.IcebergCommittable; +import org.apache.iceberg.flink.sink.committer.IcebergCommittableSerializer; +import org.apache.iceberg.flink.sink.committer.IcebergCommitter; +import org.apache.iceberg.flink.sink.committer.IcebergWriteAggregator; +import org.apache.iceberg.flink.sink.committer.WriteResultSerializer; +import org.apache.iceberg.flink.util.FlinkCompatibilityUtil; +import org.apache.iceberg.io.WriteResult; +import org.apache.iceberg.relocated.com.google.common.collect.Lists; +import org.apache.iceberg.relocated.com.google.common.collect.Maps; +import org.apache.iceberg.relocated.com.google.common.collect.Sets; +import org.apache.iceberg.types.TypeUtil; +import org.apache.iceberg.util.SerializableSupplier; +import org.slf4j.Logger; +import org.slf4j.LoggerFactory; + +/** + * Flink v2 sink offer different hooks to insert custom topologies into the sink. We will use the + * following: + * + * <ul> + * <li>{@link SupportsPreWriteTopology} which redistributes the data to the writers based on the + * {@link DistributionMode} + * <li>{@link org.apache.flink.api.connector.sink2.SinkWriter} which writes data files, and + * generates a {@link IcebergCommittable} to store the {@link + * org.apache.iceberg.io.WriteResult} + * <li>{@link SupportsPreCommitTopology} which we use to to place the {@link + * IcebergWriteAggregator} which merges the individual {@link + * org.apache.flink.api.connector.sink2.SinkWriter}'s {@link + * org.apache.iceberg.io.WriteResult}s to a single {@link + * org.apache.iceberg.flink.sink.DeltaManifests} + * <li>{@link IcebergCommitter} which stores the incoming {@link + * org.apache.iceberg.flink.sink.DeltaManifests}s in state for recovery, and commits them to + * the Iceberg table + * <li>{@link SupportsPostCommitTopology} we could use for incremental compaction later. This is + * not implemented yet. + * </ul> + * + * The job graph looks like below: + * + * <pre>{@code + * Flink sink + * +-----------------------------------------------------------------------------------+ + * | | + * +-------+ | +----------+ +-------------+ +---------------+ | + * | Map 1 | ==> | | writer 1 | | committer 1 | ---> | post commit 1 | | + * +-------+ | +----------+ +-------------+ +---------------+ | + * | \ / \ | + * | \ / \ | + * | \ / \ | + * +-------+ | +----------+ \ +-------------------+ / +-------------+ \ +---------------+ | + * | Map 2 | ==> | | writer 2 | --->| commit aggregator | | committer 2 | | post commit 2 | | + * +-------+ | +----------+ +-------------------+ +-------------+ +---------------+ | + * | Commit only on | + * | committer 1 | + * +-----------------------------------------------------------------------------------+ + * }</pre> + */ +@Experimental +public class IcebergSink + implements Sink<RowData>, + SupportsPreWriteTopology<RowData>, + SupportsCommitter<IcebergCommittable>, + SupportsPreCommitTopology<WriteResult, IcebergCommittable>, + SupportsPostCommitTopology<IcebergCommittable> { + private final Table initTable; + private final TableLoader tableLoader; + private final Map<String, String> snapshotProperties; + private final String uidPrefix; + private final String sinkId; + private final Map<String, String> writeProperties; + private final RowType flinkRowType; + private final SerializableSupplier<Table> tableSupplier; + private final transient FlinkWriteConf flinkWriteConf; + private final List<Integer> equalityFieldIds; + private final boolean upsertMode; + private final FileFormat dataFileFormat; + private final long targetDataFileSize; + private final String branch; + private final boolean overwriteMode; + private final int workerPoolSize; + private final Table table; + private final List<String> equalityFieldColumns = null; + private static final Logger LOG = LoggerFactory.getLogger(IcebergSink.class); + + private IcebergSink( + Table initTable, + TableLoader tableLoader, + Table table, + Map<String, String> snapshotProperties, + String uidPrefix, + Map<String, String> writeProperties, + RowType flinkRowType, + SerializableSupplier<Table> tableSupplier, + FlinkWriteConf flinkWriteConf, + List<Integer> equalityFieldIds, + boolean upsertMode, + FileFormat dataFileFormat, + long targetDataFileSize, + String branch, + boolean overwriteMode, + int workerPoolSize) { + this.initTable = initTable; + this.tableLoader = tableLoader; + this.snapshotProperties = snapshotProperties; + this.uidPrefix = uidPrefix; + this.writeProperties = writeProperties; + this.flinkRowType = flinkRowType; + this.tableSupplier = tableSupplier; + this.flinkWriteConf = flinkWriteConf; + this.equalityFieldIds = equalityFieldIds; + this.upsertMode = upsertMode; + this.dataFileFormat = dataFileFormat; + this.targetDataFileSize = targetDataFileSize; + this.branch = branch; + this.overwriteMode = overwriteMode; + this.workerPoolSize = workerPoolSize; + this.table = table; + // We generate a random UUID every time when a sink is created. + // This is used to separate files generated by different sinks writing the same table. + // Also used to generate the aggregator operator name + this.sinkId = UUID.randomUUID().toString(); + } + + @Override + public SinkWriter<RowData> createWriter(InitContext context) { + RowDataTaskWriterFactory taskWriterFactory = + new RowDataTaskWriterFactory( + tableSupplier, + flinkRowType, + targetDataFileSize, + dataFileFormat, + writeProperties, + equalityFieldIds, + upsertMode); + IcebergStreamWriterMetrics metrics = + new IcebergStreamWriterMetrics(context.metricGroup(), initTable.name()); + return new IcebergSinkWriter( + tableSupplier, + taskWriterFactory, + metrics, + context.getSubtaskId(), + context.getAttemptNumber()); + } + + @Override + public Committer<IcebergCommittable> createCommitter(CommitterInitContext context) { + IcebergFilesCommitterMetrics metrics = + new IcebergFilesCommitterMetrics(context.metricGroup(), initTable.name()); + return new IcebergCommitter( + tableLoader, branch, snapshotProperties, overwriteMode, workerPoolSize, sinkId, metrics); + } + + @Override + public SimpleVersionedSerializer<IcebergCommittable> getCommittableSerializer() { + return new IcebergCommittableSerializer(); + } + + @Override + public void addPostCommitTopology( + DataStream<CommittableMessage<IcebergCommittable>> committables) { + // TODO Support small file compaction + } + + @Override + public DataStream<RowData> addPreWriteTopology(DataStream<RowData> inputDataStream) { + return distributeDataStream(inputDataStream); + } + + @Override + public DataStream<CommittableMessage<IcebergCommittable>> addPreCommitTopology( + DataStream<CommittableMessage<WriteResult>> writeResults) { + TypeInformation<CommittableMessage<IcebergCommittable>> typeInformation = + CommittableMessageTypeInfo.of(this::getCommittableSerializer); + + // global forces all output records send to subtask 0 of the downstream committer operator. + // This is to ensure commit only happen in one committer subtask. + // Once upstream Flink provides the capability of setting committer operator + // parallelism to 1, this can be removed. + return writeResults + .global() Review Comment: autoscaler won't be affected as the max parallelism is set to 1 -- This is an automated message from the Apache Git Service. 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