zhangjun0x01 commented on a change in pull request #1624: URL: https://github.com/apache/iceberg/pull/1624#discussion_r512359342
########## File path: core/src/main/java/org/apache/iceberg/actions/BaseRewriteDataFilesAction.java ########## @@ -0,0 +1,271 @@ +/* + * 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.actions; + +import java.io.IOException; +import java.util.Collection; +import java.util.List; +import java.util.Map; +import java.util.stream.Collectors; +import org.apache.iceberg.CombinedScanTask; +import org.apache.iceberg.DataFile; +import org.apache.iceberg.FileScanTask; +import org.apache.iceberg.PartitionSpec; +import org.apache.iceberg.RewriteFiles; +import org.apache.iceberg.Table; +import org.apache.iceberg.TableProperties; +import org.apache.iceberg.encryption.EncryptionManager; +import org.apache.iceberg.expressions.Expression; +import org.apache.iceberg.expressions.Expressions; +import org.apache.iceberg.io.CloseableIterable; +import org.apache.iceberg.io.CloseableIterator; +import org.apache.iceberg.io.FileIO; +import org.apache.iceberg.relocated.com.google.common.base.Preconditions; +import org.apache.iceberg.relocated.com.google.common.collect.Iterables; +import org.apache.iceberg.relocated.com.google.common.collect.ListMultimap; +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.Multimaps; +import org.apache.iceberg.relocated.com.google.common.collect.Sets; +import org.apache.iceberg.relocated.com.google.common.collect.Streams; +import org.apache.iceberg.util.PropertyUtil; +import org.apache.iceberg.util.StructLikeWrapper; +import org.apache.iceberg.util.TableScanUtil; +import org.apache.iceberg.util.Tasks; +import org.slf4j.Logger; +import org.slf4j.LoggerFactory; + +public abstract class BaseRewriteDataFilesAction<ThisT> + extends BaseSnapshotUpdateAction<ThisT, RewriteDataFilesActionResult> { + + private static final Logger LOG = LoggerFactory.getLogger(BaseRewriteDataFilesAction.class); + + private final Table table; + private final FileIO fileIO; + private final EncryptionManager encryptionManager; + private boolean caseSensitive; + private PartitionSpec spec; + private Expression filter; + private long targetSizeInBytes; + private int splitLookback; + private long splitOpenFileCost; + + public BaseRewriteDataFilesAction(Table table) { + this.table = table; + this.spec = table.spec(); + this.filter = Expressions.alwaysTrue(); + long splitSize = PropertyUtil.propertyAsLong( + table.properties(), + TableProperties.SPLIT_SIZE, + TableProperties.SPLIT_SIZE_DEFAULT); + long targetFileSize = PropertyUtil.propertyAsLong( + table.properties(), + TableProperties.WRITE_TARGET_FILE_SIZE_BYTES, + TableProperties.WRITE_TARGET_FILE_SIZE_BYTES_DEFAULT); + this.targetSizeInBytes = Math.min(splitSize, targetFileSize); + + this.splitLookback = PropertyUtil.propertyAsInt( + table.properties(), + TableProperties.SPLIT_LOOKBACK, + TableProperties.SPLIT_LOOKBACK_DEFAULT); + this.splitOpenFileCost = PropertyUtil.propertyAsLong( + table.properties(), + TableProperties.SPLIT_OPEN_FILE_COST, + TableProperties.SPLIT_OPEN_FILE_COST_DEFAULT); + + this.fileIO = fileIO(table); + this.encryptionManager = table.encryption(); + } + + @Override + protected Table table() { + return table; + } + + protected EncryptionManager encryptionManager() { + return encryptionManager; + } + + protected FileIO fileIO() { + return fileIO; + } + + protected void caseSensitive(boolean newCaseSensitive) { + this.caseSensitive = newCaseSensitive; + } + + protected boolean isCaseSensitive() { + return caseSensitive; + } + + /** + * Pass a PartitionSpec id to specify which PartitionSpec should be used in DataFile rewrite + * + * @param specId PartitionSpec id to rewrite + * @return this for method chaining + */ + public BaseRewriteDataFilesAction<ThisT> outputSpecId(int specId) { + Preconditions.checkArgument(table.specs().containsKey(specId), "Invalid spec id %d", specId); + this.spec = table.specs().get(specId); + return this; + } + + /** + * Specify the target rewrite data file size in bytes + * + * @param targetSize size in bytes of rewrite data file + * @return this for method chaining + */ + public BaseRewriteDataFilesAction<ThisT> targetSizeInBytes(long targetSize) { + Preconditions.checkArgument(targetSize > 0L, "Invalid target rewrite data file size in bytes %d", + targetSize); + this.targetSizeInBytes = targetSize; + return this; + } + + /** + * Specify the number of "bins" considered when trying to pack the next file split into a task. Increasing this + * usually makes tasks a bit more even by considering more ways to pack file regions into a single task with extra + * planning cost. + * <p> + * This configuration can reorder the incoming file regions, to preserve order for lower/upper bounds in file + * metadata, user can use a lookback of 1. + * + * @param lookback number of "bins" considered when trying to pack the next file split into a task. + * @return this for method chaining + */ + public BaseRewriteDataFilesAction<ThisT> splitLookback(int lookback) { + Preconditions.checkArgument(lookback > 0L, "Invalid split lookback %d", lookback); + this.splitLookback = lookback; + return this; + } + + /** + * Specify the minimum file size to count to pack into one "bin". If the read file size is smaller than this specified + * threshold, Iceberg will use this value to do count. + * <p> + * this configuration controls the number of files to compact for each task, small value would lead to a high + * compaction, the default value is 4MB. + * + * @param openFileCost minimum file size to count to pack into one "bin". + * @return this for method chaining + */ + public BaseRewriteDataFilesAction<ThisT> splitOpenFileCost(long openFileCost) { + Preconditions.checkArgument(openFileCost > 0L, "Invalid split openFileCost %d", openFileCost); + this.splitOpenFileCost = openFileCost; + return this; + } + + + /** + * Pass a row Expression to filter DataFiles to be rewritten. Note that all files that may contain data matching the + * filter may be rewritten. + * + * @param expr Expression to filter out DataFiles + * @return this for method chaining + */ + + public BaseRewriteDataFilesAction<ThisT> filter(Expression expr) { + this.filter = Expressions.and(filter, expr); + return this; + } + + @Override + public RewriteDataFilesActionResult execute() { + CloseableIterable<FileScanTask> fileScanTasks = null; + try { + fileScanTasks = table.newScan() + .caseSensitive(caseSensitive) + .ignoreResiduals() + .filter(filter) + .planFiles(); + } finally { + try { + if (fileScanTasks != null) { + fileScanTasks.close(); + } + } catch (IOException ioe) { + LOG.warn("Failed to close task iterable", ioe); + } + } + + Map<StructLikeWrapper, Collection<FileScanTask>> groupedTasks = groupTasksByPartition(fileScanTasks.iterator()); + Map<StructLikeWrapper, Collection<FileScanTask>> filteredGroupedTasks = groupedTasks.entrySet().stream() + .filter(kv -> kv.getValue().size() > 1) + .collect(Collectors.toMap(Map.Entry::getKey, Map.Entry::getValue)); + + // Nothing to rewrite if there's only one DataFile in each partition. + if (filteredGroupedTasks.isEmpty()) { + return RewriteDataFilesActionResult.empty(); + } + // Split and combine tasks under each partition + List<CombinedScanTask> combinedScanTasks = filteredGroupedTasks.values().stream() + .map(scanTasks -> { + CloseableIterable<FileScanTask> splitTasks = TableScanUtil.splitFiles( + CloseableIterable.withNoopClose(scanTasks), targetSizeInBytes); + return TableScanUtil.planTasks(splitTasks, targetSizeInBytes, splitLookback, splitOpenFileCost); + }) + .flatMap(Streams::stream) + .collect(Collectors.toList()); + + List<DataFile> addedDataFiles = rewriteDataForTasks(combinedScanTasks); + List<DataFile> currentDataFiles = filteredGroupedTasks.values().stream() + .flatMap(tasks -> tasks.stream().map(FileScanTask::file)) + .collect(Collectors.toList()); + replaceDataFiles(currentDataFiles, addedDataFiles); + + return new RewriteDataFilesActionResult(currentDataFiles, addedDataFiles); + } + + + private Map<StructLikeWrapper, Collection<FileScanTask>> groupTasksByPartition( + CloseableIterator<FileScanTask> tasksIter) { + ListMultimap<StructLikeWrapper, FileScanTask> tasksGroupedByPartition = Multimaps.newListMultimap( + Maps.newHashMap(), Lists::newArrayList); + try (CloseableIterator<FileScanTask> iterator = tasksIter) { + iterator.forEachRemaining(task -> { + StructLikeWrapper structLike = StructLikeWrapper.forType(spec.partitionType()).set(task.file().partition()); + tasksGroupedByPartition.put(structLike, task); + }); + } catch (IOException e) { + LOG.warn("Failed to close task iterator", e); + } + return tasksGroupedByPartition.asMap(); + } + + private void replaceDataFiles(Iterable<DataFile> deletedDataFiles, Iterable<DataFile> addedDataFiles) { + try { + RewriteFiles rewriteFiles = table.newRewrite(); + rewriteFiles.rewriteFiles(Sets.newHashSet(deletedDataFiles), Sets.newHashSet(addedDataFiles)); + commit(rewriteFiles); + } catch (Exception e) { + Tasks.foreach(Iterables.transform(addedDataFiles, f -> f.path().toString())) + .noRetry() + .suppressFailureWhenFinished() + .onFailure((location, exc) -> LOG.warn("Failed to delete: {}", location, exc)) + .run(fileIO::deleteFile); + throw e; + } + } + + protected abstract FileIO fileIO(Table icebergTable); Review comment: ok,I deleted the icebergTable argument ---------------------------------------------------------------- This is an automated message from the Apache Git Service. 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