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[core] Introduce IcebergCommitCallback to create Iceberg metadata aft…
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paimon-core/src/main/java/org/apache/paimon/iceberg/IcebergCommitCallback.java
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| /* | ||
| * 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.paimon.iceberg; | ||
|
|
||
| import org.apache.paimon.Snapshot; | ||
| import org.apache.paimon.format.FileFormat; | ||
| import org.apache.paimon.fs.Path; | ||
| import org.apache.paimon.iceberg.manifest.IcebergDataFileMeta; | ||
| import org.apache.paimon.iceberg.manifest.IcebergManifestEntry; | ||
| import org.apache.paimon.iceberg.manifest.IcebergManifestFile; | ||
| import org.apache.paimon.iceberg.manifest.IcebergManifestFileMeta; | ||
| import org.apache.paimon.iceberg.manifest.IcebergManifestList; | ||
| import org.apache.paimon.iceberg.metadata.IcebergMetadata; | ||
| import org.apache.paimon.iceberg.metadata.IcebergPartitionField; | ||
| import org.apache.paimon.iceberg.metadata.IcebergPartitionSpec; | ||
| import org.apache.paimon.iceberg.metadata.IcebergSchema; | ||
| import org.apache.paimon.iceberg.metadata.IcebergSnapshot; | ||
| import org.apache.paimon.iceberg.metadata.IcebergSnapshotSummary; | ||
| import org.apache.paimon.manifest.ManifestCommittable; | ||
| import org.apache.paimon.options.Options; | ||
| import org.apache.paimon.table.FileStoreTable; | ||
| import org.apache.paimon.table.sink.CommitCallback; | ||
| import org.apache.paimon.table.source.DataSplit; | ||
| import org.apache.paimon.table.source.RawFile; | ||
| import org.apache.paimon.table.source.snapshot.SnapshotReader; | ||
| import org.apache.paimon.types.DataField; | ||
| import org.apache.paimon.types.RowType; | ||
| import org.apache.paimon.utils.Pair; | ||
| import org.apache.paimon.utils.Preconditions; | ||
| import org.apache.paimon.utils.SnapshotManager; | ||
|
|
||
| import java.io.IOException; | ||
| import java.io.UncheckedIOException; | ||
| import java.util.ArrayList; | ||
| import java.util.Collections; | ||
| import java.util.Iterator; | ||
| import java.util.List; | ||
| import java.util.UUID; | ||
|
|
||
| /** | ||
| * A {@link CommitCallback} to create Iceberg compatible metadata, so Iceberg readers can read | ||
| * Paimon's {@link RawFile}. | ||
| */ | ||
| public class IcebergCommitCallback implements CommitCallback { | ||
|
|
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| // see org.apache.iceberg.hadoop.Util | ||
| private static final String VERSION_HINT_FILENAME = "version-hint.text"; | ||
|
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| private final FileStoreTable table; | ||
| private final String commitUser; | ||
| private final IcebergPathFactory pathFactory; | ||
|
|
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| private final IcebergManifestFile manifestFile; | ||
| private final IcebergManifestList manifestList; | ||
|
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| public IcebergCommitCallback(FileStoreTable table, String commitUser) { | ||
| this.table = table; | ||
| this.commitUser = commitUser; | ||
| this.pathFactory = new IcebergPathFactory(table.location()); | ||
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|
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| RowType partitionType = table.schema().logicalPartitionType(); | ||
| RowType entryType = IcebergManifestEntry.schema(partitionType); | ||
| Options manifestFileAvroOptions = Options.fromMap(table.options()); | ||
| // https://github.com/apache/iceberg/blob/main/core/src/main/java/org/apache/iceberg/ManifestReader.java | ||
| manifestFileAvroOptions.set( | ||
| "avro.row-name-mapping", | ||
| "org.apache.paimon.avro.generated.record:manifest_entry," | ||
| + "manifest_entry_data_file:r2," | ||
| + "r2_partition:r102"); | ||
| FileFormat manifestFileAvro = FileFormat.getFileFormat(manifestFileAvroOptions, "avro"); | ||
| this.manifestFile = | ||
| new IcebergManifestFile( | ||
| table.fileIO(), | ||
| partitionType, | ||
| manifestFileAvro.createReaderFactory(entryType), | ||
| manifestFileAvro.createWriterFactory(entryType), | ||
| table.coreOptions().manifestCompression(), | ||
| pathFactory.manifestFileFactory(), | ||
| table.coreOptions().manifestTargetSize()); | ||
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| Options manifestListAvroOptions = Options.fromMap(table.options()); | ||
| // https://github.com/apache/iceberg/blob/main/core/src/main/java/org/apache/iceberg/ManifestLists.java | ||
| manifestListAvroOptions.set( | ||
| "avro.row-name-mapping", | ||
| "org.apache.paimon.avro.generated.record:manifest_file," | ||
| + "manifest_file_partitions:r508"); | ||
| FileFormat manifestListAvro = FileFormat.getFileFormat(manifestListAvroOptions, "avro"); | ||
| this.manifestList = | ||
| new IcebergManifestList( | ||
| table.fileIO(), | ||
| manifestListAvro.createReaderFactory(IcebergManifestFileMeta.schema()), | ||
| manifestListAvro.createWriterFactory(IcebergManifestFileMeta.schema()), | ||
| table.coreOptions().manifestCompression(), | ||
| pathFactory.manifestListFactory()); | ||
| } | ||
|
|
||
| @Override | ||
| public void call(List<ManifestCommittable> committables) { | ||
| for (ManifestCommittable committable : committables) { | ||
| try { | ||
| commitMetadata(committable); | ||
| } catch (IOException e) { | ||
| throw new UncheckedIOException(e); | ||
| } | ||
| } | ||
| } | ||
|
|
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| private void commitMetadata(ManifestCommittable committable) throws IOException { | ||
| Pair<Long, Long> pair = getCurrentAndBaseSnapshotIds(committable.identifier()); | ||
| long currentSnapshot = pair.getLeft(); | ||
| Long baseSnapshot = pair.getRight(); | ||
|
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| createMetadataWithoutBase(currentSnapshot); | ||
| } | ||
|
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| private Pair<Long, Long> getCurrentAndBaseSnapshotIds(long commitIdentifier) { | ||
| SnapshotManager snapshotManager = table.snapshotManager(); | ||
| List<Snapshot> currentSnapshots = | ||
| snapshotManager.findSnapshotsForIdentifiers( | ||
| commitUser, Collections.singletonList(commitIdentifier)); | ||
| Preconditions.checkArgument( | ||
| currentSnapshots.size() == 1, | ||
| "Cannot find snapshot with user {} and identifier {}", | ||
| commitUser, | ||
| commitIdentifier); | ||
| long currentSnapshotId = currentSnapshots.get(0).id(); | ||
|
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| long earliest = | ||
| Preconditions.checkNotNull( | ||
| snapshotManager.earliestSnapshotId(), | ||
| "Cannot determine earliest snapshot ID. This is unexpected."); | ||
| Long baseSnapshotId = null; | ||
| for (long id = currentSnapshotId - 1; id >= earliest; id--) { | ||
| try { | ||
| Snapshot snapshot = snapshotManager.snapshot(id); | ||
| if (!snapshot.commitUser().equals(commitUser) | ||
| || snapshot.commitIdentifier() < commitIdentifier) { | ||
| baseSnapshotId = id; | ||
| break; | ||
| } | ||
| } catch (Exception ignore) { | ||
| break; | ||
| } | ||
| } | ||
|
|
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| return Pair.of(currentSnapshotId, baseSnapshotId); | ||
| } | ||
|
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| private void createMetadataWithoutBase(long snapshotId) throws IOException { | ||
| SnapshotReader snapshotReader = table.newSnapshotReader().withSnapshot(snapshotId); | ||
| Iterator<IcebergManifestEntry> entryIterator = | ||
| snapshotReader.read().dataSplits().stream() | ||
| .filter(DataSplit::rawConvertible) | ||
| .flatMap(s -> dataSplitToDataFileMeta(s).stream()) | ||
| .map( | ||
| m -> | ||
| new IcebergManifestEntry( | ||
| IcebergManifestEntry.Status.ADDED, | ||
| snapshotId, | ||
| snapshotId, | ||
| snapshotId, | ||
| m)) | ||
| .iterator(); | ||
| List<IcebergManifestFileMeta> manifestFileMetas = | ||
| manifestFile.rollingWrite(entryIterator, snapshotId); | ||
| String manifestListFileName = manifestList.writeWithoutRolling(manifestFileMetas); | ||
|
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| List<IcebergPartitionField> partitionFields = | ||
| getPartitionFields(table.schema().logicalPartitionType()); | ||
| int schemaId = (int) table.schema().id(); | ||
| IcebergSnapshot snapshot = | ||
| new IcebergSnapshot( | ||
| snapshotId, | ||
| snapshotId, | ||
| System.currentTimeMillis(), | ||
| new IcebergSnapshotSummary(IcebergSnapshotSummary.OPERATION_APPEND), | ||
| pathFactory.toManifestListPath(manifestListFileName).toString(), | ||
| schemaId); | ||
|
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| String tableUuid = UUID.randomUUID().toString(); | ||
| IcebergMetadata metadata = | ||
| new IcebergMetadata( | ||
| tableUuid, | ||
| table.location().toString(), | ||
| snapshotId, | ||
| table.schema().highestFieldId(), | ||
| Collections.singletonList(new IcebergSchema(table.schema())), | ||
| schemaId, | ||
| Collections.singletonList(new IcebergPartitionSpec(partitionFields)), | ||
| partitionFields.stream() | ||
| .mapToInt(IcebergPartitionField::fieldId) | ||
| .max() | ||
| .orElse( | ||
| // not sure why, this is a result tested by hand | ||
| IcebergPartitionField.FIRST_FIELD_ID - 1), | ||
| Collections.singletonList(snapshot), | ||
| (int) snapshotId); | ||
| table.fileIO().tryToWriteAtomic(pathFactory.toMetadataPath(snapshotId), metadata.toJson()); | ||
| table.fileIO() | ||
| .overwriteFileUtf8( | ||
| new Path(pathFactory.metadataDirectory(), VERSION_HINT_FILENAME), | ||
| String.valueOf(snapshotId)); | ||
| } | ||
|
|
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| private List<IcebergDataFileMeta> dataSplitToDataFileMeta(DataSplit dataSplit) { | ||
| List<IcebergDataFileMeta> result = new ArrayList<>(); | ||
| for (RawFile rawFile : dataSplit.convertToRawFiles().get()) { | ||
| result.add( | ||
| new IcebergDataFileMeta( | ||
| IcebergDataFileMeta.Content.DATA, | ||
| rawFile.path(), | ||
| rawFile.format(), | ||
| dataSplit.partition(), | ||
| rawFile.rowCount(), | ||
| rawFile.fileSize())); | ||
| } | ||
| return result; | ||
| } | ||
|
|
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| private List<IcebergPartitionField> getPartitionFields(RowType partitionType) { | ||
| List<IcebergPartitionField> result = new ArrayList<>(); | ||
| int fieldId = IcebergPartitionField.FIRST_FIELD_ID; | ||
| for (DataField field : partitionType.getFields()) { | ||
| result.add(new IcebergPartitionField(field, fieldId)); | ||
| fieldId++; | ||
| } | ||
| return result; | ||
| } | ||
|
|
||
| @Override | ||
| public void close() throws Exception {} | ||
| } |
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