stevenzwu commented on a change in pull request #2217: URL: https://github.com/apache/iceberg/pull/2217#discussion_r571645531
########## File path: flink/src/main/java/org/apache/iceberg/flink/actions/MigrateAction.java ########## @@ -0,0 +1,424 @@ +/* + * 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.actions; + +import java.io.IOException; +import java.io.UncheckedIOException; +import java.util.Arrays; +import java.util.Collection; +import java.util.List; +import java.util.Map; +import java.util.stream.Collectors; +import org.apache.flink.api.common.functions.RichMapFunction; +import org.apache.flink.configuration.GlobalConfiguration; +import org.apache.flink.runtime.util.HadoopUtils; +import org.apache.flink.streaming.api.datastream.DataStream; +import org.apache.flink.streaming.api.environment.StreamExecutionEnvironment; +import org.apache.flink.table.catalog.CatalogPartitionSpec; +import org.apache.flink.table.catalog.ObjectPath; +import org.apache.flink.table.catalog.exceptions.TableNotExistException; +import org.apache.flink.table.catalog.hive.HiveCatalog; +import org.apache.flink.util.ArrayUtils; +import org.apache.hadoop.conf.Configuration; +import org.apache.hadoop.fs.FileStatus; +import org.apache.hadoop.fs.FileSystem; +import org.apache.hadoop.fs.Path; +import org.apache.hadoop.fs.PathFilter; +import org.apache.hadoop.hive.metastore.api.FieldSchema; +import org.apache.hadoop.hive.metastore.api.Partition; +import org.apache.iceberg.AppendFiles; +import org.apache.iceberg.DataFile; +import org.apache.iceberg.DataFiles; +import org.apache.iceberg.FileFormat; +import org.apache.iceberg.ManifestFile; +import org.apache.iceberg.ManifestFiles; +import org.apache.iceberg.ManifestWriter; +import org.apache.iceberg.Metrics; +import org.apache.iceberg.MetricsConfig; +import org.apache.iceberg.PartitionField; +import org.apache.iceberg.PartitionSpec; +import org.apache.iceberg.Schema; +import org.apache.iceberg.Table; +import org.apache.iceberg.TableProperties; +import org.apache.iceberg.actions.Action; +import org.apache.iceberg.catalog.Catalog; +import org.apache.iceberg.catalog.Namespace; +import org.apache.iceberg.catalog.TableIdentifier; +import org.apache.iceberg.flink.FlinkCatalogFactory; +import org.apache.iceberg.hadoop.HadoopCatalog; +import org.apache.iceberg.hadoop.HadoopFileIO; +import org.apache.iceberg.hadoop.HadoopInputFile; +import org.apache.iceberg.hive.HiveSchemaUtil; +import org.apache.iceberg.io.FileIO; +import org.apache.iceberg.io.InputFile; +import org.apache.iceberg.io.OutputFile; +import org.apache.iceberg.mapping.NameMapping; +import org.apache.iceberg.mapping.NameMappingParser; +import org.apache.iceberg.orc.OrcMetrics; +import org.apache.iceberg.parquet.ParquetUtil; +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.util.PropertyUtil; +import org.apache.iceberg.util.Tasks; + +public class MigrateAction implements Action<List<ManifestFile>> { + + private static final String PATQUET_INPUT_FORMAT = "org.apache.hadoop.hive.ql.io.parquet.MapredParquetInputFormat"; + private static final String ORC_INPUT_FORMAT = "org.apache.hadoop.hive.ql.io.orc.OrcInputFormat"; + private static final String AVRO_INPUT_FORMAT = "org.apache.hadoop.hive.ql.io.avro.AvroContainerInputFormat"; + private static final PathFilter HIDDEN_PATH_FILTER = + p -> !p.getName().startsWith("_") && !p.getName().startsWith("."); + private static final String ICEBERG_METADATA_FOLDER = "metadata"; + + private final StreamExecutionEnvironment env; + private final HiveCatalog flinkHiveCatalog; // the HiveCatalog of flink + private final String hiveSourceDatabaseName; + private final String hiveSourceTableName; + private final Catalog icebergCatalog; + private final Namespace baseNamespace; + private final String icebergDatabaseName; + private final String icebergTableName; + private int maxParallelism; + + public MigrateAction(StreamExecutionEnvironment env, HiveCatalog flinkHiveCatalog, String hiveSourceDatabaseName, + String hiveSourceTableName, Catalog icebergCatalog, Namespace baseNamespace, + String icebergDatabaseName, + String icebergTableName) { + this.env = env; + this.flinkHiveCatalog = flinkHiveCatalog; + this.hiveSourceDatabaseName = hiveSourceDatabaseName; + this.hiveSourceTableName = hiveSourceTableName; + this.icebergCatalog = icebergCatalog; + this.baseNamespace = baseNamespace; + this.icebergDatabaseName = icebergDatabaseName; + this.icebergTableName = icebergTableName; + this.maxParallelism = env.getParallelism(); + } + + @Override + public List<ManifestFile> execute() { + flinkHiveCatalog.open(); + // hive source table + ObjectPath tableSource = new ObjectPath(hiveSourceDatabaseName, hiveSourceTableName); + org.apache.hadoop.hive.metastore.api.Table hiveTable; + try { + hiveTable = flinkHiveCatalog.getHiveTable(tableSource); + } catch (TableNotExistException e) { + throw new RuntimeException(String.format("The source table %s not exists ! ", hiveSourceTableName)); + } + + List<FieldSchema> fieldSchemaList = hiveTable.getSd().getCols(); + List<FieldSchema> partitionList = hiveTable.getPartitionKeys(); + fieldSchemaList.addAll(partitionList); + Schema icebergSchema = HiveSchemaUtil.convert(fieldSchemaList); + PartitionSpec spec = toPartitionSpec(partitionList, icebergSchema); + + FileFormat fileFormat = getHiveFileFormat(hiveTable); + + TableIdentifier identifier = TableIdentifier.of(toNamespace(), icebergTableName); + String hiveLocation = hiveTable.getSd().getLocation(); + + Map<String, String> properties = Maps.newHashMap(); + properties.put(TableProperties.DEFAULT_FILE_FORMAT, fileFormat.name()); + if (!baseNamespace.isEmpty()) { + properties.put(FlinkCatalogFactory.BASE_NAMESPACE, baseNamespace.toString()); + } + + Table icebergTable; + if (icebergCatalog instanceof HadoopCatalog) { + icebergTable = icebergCatalog.createTable(identifier, icebergSchema, spec, properties); + } else { + icebergTable = icebergCatalog.createTable(identifier, icebergSchema, spec, hiveLocation, properties); + } + + String metadataLocation = getMetadataLocation(icebergTable); + + String nameMapping = + PropertyUtil.propertyAsString(icebergTable.properties(), TableProperties.DEFAULT_NAME_MAPPING, null); + MetricsConfig metricsConfig = MetricsConfig.fromProperties(icebergTable.properties()); + + List<ManifestFile> manifestFiles = null; + try { + if (spec.isUnpartitioned()) { + manifestFiles = + migrateUnpartitionedTable(spec, fileFormat, hiveLocation, icebergTable, nameMapping, metricsConfig, + metadataLocation); + } else { + manifestFiles = + migratePartitionedTable(spec, tableSource, nameMapping, fileFormat, metricsConfig, icebergTable.name(), + metadataLocation); + + } + } catch (Exception e) { + deleteManifests(icebergTable.io(), manifestFiles); + throw new RuntimeException("Migrate", e); + } + + AppendFiles append = icebergTable.newAppend(); + manifestFiles.forEach(append::appendManifest); + append.commit(); + + flinkHiveCatalog.close(); + return manifestFiles; + } + + private void deleteManifests(FileIO io, List<ManifestFile> manifests) { + Tasks.foreach(manifests) + .noRetry() + .suppressFailureWhenFinished() + .run(item -> io.deleteFile(item.path())); + } + + private FileFormat getHiveFileFormat(org.apache.hadoop.hive.metastore.api.Table hiveTable) { + String hiveFormat = hiveTable.getSd().getInputFormat(); + FileFormat fileFormat; + switch (hiveFormat) { + case PATQUET_INPUT_FORMAT: + fileFormat = FileFormat.PARQUET; + break; + + case ORC_INPUT_FORMAT: + fileFormat = FileFormat.ORC; + break; + + case AVRO_INPUT_FORMAT: + fileFormat = FileFormat.AVRO; + break; + + default: + throw new UnsupportedOperationException("Unsupported file format"); + } + + return fileFormat; + } + + private String getMetadataLocation(Table table) { + return table.properties() + .getOrDefault(TableProperties.WRITE_METADATA_LOCATION, table.location() + "/" + ICEBERG_METADATA_FOLDER); + } + + private List<ManifestFile> migrateUnpartitionedTable(PartitionSpec spec, FileFormat fileFormat, String hiveLocation, + Table icebergTable, String nameMapping, + MetricsConfig metricsConfig, String metadataLocation) + throws Exception { + MigrateMapper migrateMapper = new MigrateMapper(spec, nameMapping, fileFormat, metricsConfig, metadataLocation); + DataStream<PartitionAndLocation> dataStream = + env.fromElements(new PartitionAndLocation(hiveLocation, Maps.newHashMap())); + DataStream<List<ManifestFile>> ds = dataStream.map(migrateMapper); + return Lists.newArrayList(ds.executeAndCollect("migrate table :" + icebergTable.name())).stream() + .flatMap(Collection::stream).collect(Collectors.toList()); + } + + private Namespace toNamespace() { + return Namespace.of(ArrayUtils.concat(baseNamespace.levels(), new String[] {icebergDatabaseName})); + } + + private List<ManifestFile> migratePartitionedTable(PartitionSpec spec, ObjectPath tableSource, + String nameMapping, FileFormat fileFormat, + MetricsConfig metricsConfig, String hiveTableName, + String metadataLocation) + throws Exception { + List<CatalogPartitionSpec> partitionSpecs = flinkHiveCatalog.listPartitions(tableSource); + List<PartitionAndLocation> inputs = Lists.newArrayList(); + for (CatalogPartitionSpec partitionSpec : partitionSpecs) { + Partition partition = + flinkHiveCatalog.getHivePartition(flinkHiveCatalog.getHiveTable(tableSource), partitionSpec); + inputs.add( + new PartitionAndLocation(partition.getSd().getLocation(), Maps.newHashMap(partitionSpec.getPartitionSpec()))); + } + + int size = partitionSpecs.size(); + int parallelism = Math.min(size, maxParallelism); + + DataStream<PartitionAndLocation> dataStream = env.fromCollection(inputs); + MigrateMapper migrateMapper = new MigrateMapper(spec, nameMapping, fileFormat, metricsConfig, metadataLocation); + DataStream<List<ManifestFile>> ds = dataStream.map(migrateMapper).setParallelism(parallelism); Review comment: This is probably better a `DataStream<ManifestFile>` ---------------------------------------------------------------- This is an automated message from the Apache Git Service. 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