singhpk234 commented on code in PR #6449: URL: https://github.com/apache/iceberg/pull/6449#discussion_r1082969487
########## delta-lake/src/main/java/org/apache/iceberg/delta/BaseSnapshotDeltaLakeTableAction.java: ########## @@ -0,0 +1,370 @@ +/* + * 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.delta; + +import io.delta.standalone.DeltaLog; +import io.delta.standalone.VersionLog; +import io.delta.standalone.actions.Action; +import io.delta.standalone.actions.AddFile; +import io.delta.standalone.actions.RemoveFile; +import java.io.File; +import java.net.URI; +import java.util.Iterator; +import java.util.List; +import java.util.Map; +import java.util.stream.Collectors; +import org.apache.hadoop.conf.Configuration; +import org.apache.iceberg.AppendFiles; +import org.apache.iceberg.DataFile; +import org.apache.iceberg.DataFiles; +import org.apache.iceberg.DeleteFiles; +import org.apache.iceberg.FileFormat; +import org.apache.iceberg.Metrics; +import org.apache.iceberg.MetricsConfig; +import org.apache.iceberg.OverwriteFiles; +import org.apache.iceberg.PartitionField; +import org.apache.iceberg.PartitionSpec; +import org.apache.iceberg.Schema; +import org.apache.iceberg.SnapshotSummary; +import org.apache.iceberg.Table; +import org.apache.iceberg.TableProperties; +import org.apache.iceberg.Transaction; +import org.apache.iceberg.avro.Avro; +import org.apache.iceberg.catalog.Catalog; +import org.apache.iceberg.catalog.TableIdentifier; +import org.apache.iceberg.exceptions.ValidationException; +import org.apache.iceberg.hadoop.HadoopFileIO; +import org.apache.iceberg.io.InputFile; +import org.apache.iceberg.mapping.MappingUtil; +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.ImmutableMap; +import org.apache.iceberg.relocated.com.google.common.collect.Iterables; +import org.apache.iceberg.relocated.com.google.common.collect.Lists; +import org.apache.iceberg.types.Type; +import org.slf4j.Logger; +import org.slf4j.LoggerFactory; + +/** + * Takes a Delta Lake table's location and attempts to create an Iceberg table snapshot in an + * optional user-specified location (default to the Delta Lake table's location) with a different + * identifier. + */ +class BaseSnapshotDeltaLakeTableAction implements SnapshotDeltaLakeTable { + + private static final Logger LOG = LoggerFactory.getLogger(BaseSnapshotDeltaLakeTableAction.class); + + private static final String SNAPSHOT_SOURCE_PROP = "snapshot_source"; + private static final String DELTA_SOURCE_VALUE = "delta"; + private static final String ORIGINAL_LOCATION_PROP = "original_location"; + private static final String PARQUET_SUFFIX = ".parquet"; + private static final String AVRO_SUFFIX = ".avro"; + private static final String ORC_SUFFIX = ".orc"; + private final ImmutableMap.Builder<String, String> additionalPropertiesBuilder = + ImmutableMap.builder(); + private DeltaLog deltaLog; + private Catalog icebergCatalog; + private final String deltaTableLocation; + private TableIdentifier newTableIdentifier; + private String newTableLocation; + private HadoopFileIO deltaLakeFileIO; + + /** + * Snapshot a delta lake table to be an iceberg table. The action will read the delta lake table's + * log through the table's path, create a new iceberg table using the given icebergCatalog and + * newTableIdentifier, and commit all changes in one iceberg transaction. + * + * <p>The new table will only be created if the snapshot is successful. + * + * @param deltaTableLocation the delta lake table's path + */ + BaseSnapshotDeltaLakeTableAction(String deltaTableLocation) { + this.deltaTableLocation = deltaTableLocation; + this.newTableLocation = deltaTableLocation; + } + + @Override + public SnapshotDeltaLakeTable tableProperties(Map<String, String> properties) { + additionalPropertiesBuilder.putAll(properties); + return this; + } + + @Override + public SnapshotDeltaLakeTable tableProperty(String name, String value) { + additionalPropertiesBuilder.put(name, value); + return this; + } + + @Override + public SnapshotDeltaLakeTable tableLocation(String location) { + this.newTableLocation = location; + return this; + } + + @Override + public SnapshotDeltaLakeTable as(TableIdentifier identifier) { + this.newTableIdentifier = identifier; + return this; + } + + @Override + public SnapshotDeltaLakeTable icebergCatalog(Catalog catalog) { + this.icebergCatalog = catalog; + return this; + } + + @Override + public SnapshotDeltaLakeTable deltaLakeConfiguration(Configuration conf) { + this.deltaLog = DeltaLog.forTable(conf, deltaTableLocation); + this.deltaLakeFileIO = new HadoopFileIO(conf); + return this; + } + + @Override + public Result execute() { + Preconditions.checkArgument( Review Comment: >the DeltaLog for table with higher reader/writer version by DeltaLog.forTable(conf, deltaTableLocation) if this check is embeded within the forTable itself then I think I am fine with it :) -- This is an automated message from the Apache Git Service. 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