aokolnychyi commented on a change in pull request #2415: URL: https://github.com/apache/iceberg/pull/2415#discussion_r627835090
########## File path: spark/src/main/java/org/apache/iceberg/spark/actions/BaseRemoveFilesSparkAction.java ########## @@ -0,0 +1,220 @@ +/* + * 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.spark.actions; + +import java.util.HashSet; +import java.util.Iterator; +import java.util.List; +import java.util.Set; +import java.util.concurrent.ExecutorService; +import java.util.concurrent.atomic.AtomicLong; +import java.util.function.Consumer; +import org.apache.iceberg.HasTableOperations; +import org.apache.iceberg.Table; +import org.apache.iceberg.TableMetadata; +import org.apache.iceberg.TableMetadataParser; +import org.apache.iceberg.TableOperations; +import org.apache.iceberg.actions.RemoveFiles; +import org.apache.iceberg.actions.RemoveFilesActionResult; +import org.apache.iceberg.exceptions.NotFoundException; +import org.apache.iceberg.io.FileIO; +import org.apache.iceberg.relocated.com.google.common.collect.Lists; +import org.apache.iceberg.spark.JobGroupInfo; +import org.apache.iceberg.util.PropertyUtil; +import org.apache.iceberg.util.Tasks; +import org.apache.spark.sql.Column; +import org.apache.spark.sql.Dataset; +import org.apache.spark.sql.Encoders; +import org.apache.spark.sql.Row; +import org.apache.spark.sql.SparkSession; +import org.apache.spark.sql.functions; +import org.slf4j.Logger; +import org.slf4j.LoggerFactory; + +/** + * An action that performs the same operation as {@link RemoveFiles} but uses Spark + * to determine the files that needs to be deleted. The action uses metadata tables to + * find the files to be deleted. + * Deletes are performed locally after retrieving the results from the Spark executors. + */ +@SuppressWarnings("UnnecessaryAnonymousClass") +public class BaseRemoveFilesSparkAction + extends BaseSparkAction<RemoveFiles, RemoveFiles.Result> implements RemoveFiles { + private static final Logger LOG = LoggerFactory.getLogger(BaseRemoveFilesSparkAction.class); + + private static final String DATA_FILE = "Data File"; + private static final String MANIFEST = "Manifest"; + private static final String MANIFEST_LIST = "Manifest List"; + private static final String OTHERS = "Others"; + + private static final String STREAM_RESULTS = "stream-results"; + + // Creates an executor service that runs each task in the thread that invokes execute/submit. + private static final ExecutorService DEFAULT_DELETE_EXECUTOR_SERVICE = null; + + private final Table table; + private final TableOperations ops; + private final Consumer<String> defaultDelete = new Consumer<String>() { + @Override + public void accept(String file) { + ops.io().deleteFile(file); + } + }; + + private Consumer<String> deleteFunc = defaultDelete; + private ExecutorService deleteExecutorService = DEFAULT_DELETE_EXECUTOR_SERVICE; + + public BaseRemoveFilesSparkAction(SparkSession spark, Table table) { + super(spark); + this.table = table; + this.ops = ((HasTableOperations) table).operations(); + } + + @Override + protected RemoveFiles self() { + return this; + } + + @Override + public Result execute() { + JobGroupInfo info = newJobGroupInfo("REMOVE-FILES", "REMOVE-FILES"); + return withJobGroupInfo(info, this::doExecute); + } + + private Result doExecute() { + boolean streamResults = PropertyUtil.propertyAsBoolean(options(), STREAM_RESULTS, false); + Dataset<Row> validFileDataset = buildValidFileDF(ops.current()).distinct(); + RemoveFilesActionResult result; + if (streamResults) { + result = deleteFiles(validFileDataset.toLocalIterator()); + } else { + result = deleteFiles(validFileDataset.collectAsList().iterator()); + } + return result; + } + + private Dataset<Row> appendTypeString(Dataset<Row> ds, String type) { + return ds.select(new Column("file_path"), functions.lit(type).as("file_type")); + } + + private Dataset<Row> buildValidFileDF(TableMetadata metadata) { + Table staticTable = newStaticTable(metadata, this.table.io()); + return appendTypeString(buildValidDataFileDF(staticTable), DATA_FILE) + .union(appendTypeString(buildManifestFileDF(staticTable), MANIFEST)) + .union(appendTypeString(buildManifestListDF(staticTable), MANIFEST_LIST)) + .union(appendTypeString(buildOtherMetadataFileDF(ops), OTHERS)); + } + + protected Dataset<Row> buildOtherMetadataFileDF(TableOperations tableOps) { + List<String> otherMetadataFiles = Lists.newArrayList(); + otherMetadataFiles.add(tableOps.metadataFileLocation("version-hint.text")); + + Set<String> metadataFiles = new HashSet<>(); + TableMetadata metadata = tableOps.current(); + String location = metadata.metadataFileLocation(); + metadataFiles.add(location); + getMetadataFiles(location, metadataFiles, tableOps.io()); + otherMetadataFiles.addAll(metadataFiles); + return spark().createDataset(otherMetadataFiles, Encoders.STRING()).toDF("file_path"); + } + + private void getMetadataFiles(String metadataFileLocation, Set<String> metaFiles, FileIO io) { + if (metadataFileLocation == null) { + return; + } + long minTimeStamp = Long.MAX_VALUE; + String minMetadataLocation = null; + try { + TableMetadata metadata = TableMetadataParser.read(io, metadataFileLocation); + for (TableMetadata.MetadataLogEntry previousMetadataFile : metadata.previousFiles()) { + metaFiles.add(previousMetadataFile.file()); + if (previousMetadataFile.timestampMillis() < minTimeStamp) { + minTimeStamp = previousMetadataFile.timestampMillis(); + minMetadataLocation = previousMetadataFile.file(); + } + } + getMetadataFiles(minMetadataLocation, metaFiles, io); + } catch (NotFoundException e) { + LOG.info("File not found", e); + } + } + + /** + * Deletes files passed to it based on their type. + * + * @param deleted an Iterator of Spark Rows of the structure (path: String, type: String) + * @return Statistics on which files were deleted + */ + private RemoveFilesActionResult deleteFiles(Iterator<Row> deleted) { + AtomicLong dataFileCount = new AtomicLong(0L); + AtomicLong manifestCount = new AtomicLong(0L); + AtomicLong manifestListCount = new AtomicLong(0L); + AtomicLong otherFilesCount = new AtomicLong(0L); + + Tasks.foreach(deleted) + .retry(3).stopRetryOn(NotFoundException.class).suppressFailureWhenFinished() + .executeWith(deleteExecutorService) + .onFailure((fileInfo, exc) -> { + String file = fileInfo.getString(0); + String type = fileInfo.getString(1); + LOG.warn("Delete failed for {}: {}", type, file, exc); + }) + .run(fileInfo -> { + String file = fileInfo.getString(0); + String type = fileInfo.getString(1); + deleteFunc.accept(file); + switch (type) { + case DATA_FILE: + dataFileCount.incrementAndGet(); + LOG.trace("Deleted Data File: {}", file); + break; + case MANIFEST: + manifestCount.incrementAndGet(); + LOG.debug("Deleted Manifest: {}", file); + break; + case MANIFEST_LIST: + manifestListCount.incrementAndGet(); + LOG.debug("Deleted Manifest List: {}", file); + break; + case OTHERS: + otherFilesCount.incrementAndGet(); + LOG.debug("Others: {}", file); + break; + } + }); + + LOG.info("Deleted {} total files", dataFileCount.get() + manifestCount.get() + manifestListCount.get()); Review comment: Looks like this count does not add other files. -- This is an automated message from the Apache Git Service. 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