stevenzwu commented on code in PR #4904: URL: https://github.com/apache/iceberg/pull/4904#discussion_r936680198
########## flink/v1.15/flink/src/main/java/org/apache/iceberg/flink/sink/IcebergSink.java: ########## @@ -0,0 +1,672 @@ +/* + * 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.WRITE_DISTRIBUTION_MODE; + +import java.io.IOException; +import java.io.UncheckedIOException; +import java.util.Collection; +import java.util.List; +import java.util.Map; +import java.util.Set; +import java.util.function.Function; +import javax.annotation.Nullable; +import org.apache.flink.api.common.functions.MapFunction; +import org.apache.flink.api.common.functions.RichMapFunction; +import org.apache.flink.api.common.typeinfo.TypeInformation; +import org.apache.flink.api.connector.sink2.Committer; +import org.apache.flink.api.connector.sink2.StatefulSink; +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.CommittableWithLineage; +import org.apache.flink.streaming.api.connector.sink2.WithPostCommitTopology; +import org.apache.flink.streaming.api.connector.sink2.WithPreCommitTopology; +import org.apache.flink.streaming.api.connector.sink2.WithPreWriteTopology; +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.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.FilesCommittable; +import org.apache.iceberg.flink.sink.committer.FilesCommittableSerializer; +import org.apache.iceberg.flink.sink.committer.FilesCommitter; +import org.apache.iceberg.flink.sink.writer.StreamWriter; +import org.apache.iceberg.flink.sink.writer.StreamWriterState; +import org.apache.iceberg.flink.sink.writer.StreamWriterStateSerializer; +import org.apache.iceberg.flink.util.FlinkCompatibilityUtil; +import org.apache.iceberg.relocated.com.google.common.base.Preconditions; +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.slf4j.Logger; +import org.slf4j.LoggerFactory; + +/** + * Flink v2 sink offer different hooks to insert custom topologies into the sink. It includes + * writers that can write data to files in parallel and route commit info globally to one Committer. + * Post commit topology will take of compacting the already written files and updating the file log + * after the compaction. + * + * <pre>{@code + * Flink sink + * +------------------------------------------------------------------+ + * | | + * +-------+ | +-------------+ +---------------+ | + * | Map 1 | ==> | | writer 1 | =| | committer 1 | | + * +-------+ | +-------------+ +---------------+ | + * | \ | + * | \ | + * | \ | + * +-------+ | +-------------+ \ +---------------+ +---------------+ | + * | Map 2 | ==> | | writer 2 | =| --- >| committer 2 | ---> | post commit | | + * +-------+ | +-------------+ +---------------+ +---------------+ | + * | | + * +------------------------------------------------------------------+ + * }</pre> + */ +public class IcebergSink + implements StatefulSink<RowData, StreamWriterState>, + WithPreWriteTopology<RowData>, + WithPreCommitTopology<RowData, FilesCommittable>, + WithPostCommitTopology<RowData, FilesCommittable> { + private static final Logger LOG = LoggerFactory.getLogger(IcebergSink.class); + + private final TableLoader tableLoader; + private final Table table; + private final boolean overwrite; + private final boolean upsertMode; + private final DistributionMode distributionMode; + private final List<String> equalityFieldColumns; + private final List<Integer> equalityFieldIds; + private final FileFormat dataFileFormat; + private final int workerPoolSize; + private final long targetDataFileSize; + private final String uidPrefix; + private final Map<String, String> snapshotProperties; + private final RowType flinkRowType; + private Committer<FilesCommittable> committer; + + public IcebergSink( + TableLoader tableLoader, + @Nullable Table newTable, + TableSchema tableSchema, + List<String> equalityFieldColumns, + @Nullable String uidPrefix, + ReadableConfig readableConfig, + Map<String, String> writeOptions, + Map<String, String> snapshotProperties) { + this.tableLoader = tableLoader; + this.equalityFieldColumns = equalityFieldColumns; + this.uidPrefix = uidPrefix == null ? "" : uidPrefix; + this.snapshotProperties = snapshotProperties; + + Preconditions.checkNotNull(tableLoader, "Table loader shouldn't be null"); + + if (newTable == null) { + tableLoader.open(); + try (TableLoader loader = tableLoader) { + this.table = loader.loadTable(); + } catch (IOException e) { + throw new UncheckedIOException( + "Failed to load iceberg table from table loader: " + tableLoader, e); + } + } else { + this.table = newTable; + } + + FlinkWriteConf flinkWriteConf = new FlinkWriteConf(table, writeOptions, readableConfig); + + this.equalityFieldIds = checkAndGetEqualityFieldIds(table, equalityFieldColumns); + + this.flinkRowType = toFlinkRowType(table.schema(), tableSchema); + + // Validate the equality fields and partition fields if we enable the upsert mode. + if (flinkWriteConf.upsertMode()) { + Preconditions.checkState( + !flinkWriteConf.overwriteMode(), + "OVERWRITE mode shouldn't be enable when configuring to use UPSERT data stream."); + Preconditions.checkState( + !equalityFieldIds.isEmpty(), + "Equality field columns shouldn't be empty when configuring to use UPSERT data stream."); + if (!table.spec().isUnpartitioned()) { + for (PartitionField partitionField : table.spec().fields()) { + Preconditions.checkState( + equalityFieldIds.contains(partitionField.sourceId()), + "In UPSERT mode, partition field '%s' should be included in equality fields: '%s'", + partitionField, + equalityFieldColumns); + } + } + } + + this.upsertMode = flinkWriteConf.upsertMode(); Review Comment: we can extract the config inside the `FlinkWriteConf`, which can be serializable. we don't have to make `FlinkConfParser` serializable, as `ReadableConfig` is not serializable. -- This is an automated message from the Apache Git Service. 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