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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.iceberg;
import java.io.IOException;
import java.util.Map;
import org.apache.iceberg.ManifestReader.FileType;
import org.apache.iceberg.avro.AvroEncoderUtil;
import org.apache.iceberg.avro.AvroSchemaUtil;
import org.apache.iceberg.exceptions.RuntimeIOException;
import org.apache.iceberg.io.CloseableIterable;
import org.apache.iceberg.io.FileIO;
import org.apache.iceberg.io.InputFile;
import org.apache.iceberg.io.OutputFile;
import org.apache.iceberg.relocated.com.google.common.base.Preconditions;
import org.apache.iceberg.relocated.com.google.common.collect.ImmutableList;
import org.apache.iceberg.relocated.com.google.common.collect.ImmutableMap;
public class ManifestFiles {
private ManifestFiles() {}
private static final org.apache.avro.Schema MANIFEST_AVRO_SCHEMA =
AvroSchemaUtil.convert(
ManifestFile.schema(),
ImmutableMap.of(
ManifestFile.schema().asStruct(),
GenericManifestFile.class.getName(),
ManifestFile.PARTITION_SUMMARY_TYPE,
GenericPartitionFieldSummary.class.getName()));
/**
* Returns a {@link CloseableIterable} of file paths in the {@link ManifestFile}.
*
* @param manifest a ManifestFile
* @param io a FileIO
* @return a manifest reader
*/
public static CloseableIterable readPaths(ManifestFile manifest, FileIO io) {
return CloseableIterable.transform(
read(manifest, io, null).select(ImmutableList.of("file_path")).liveEntries(),
entry -> entry.file().path().toString());
}
/**
* Returns a new {@link ManifestReader} for a {@link ManifestFile}.
*
* Note: Callers should use {@link ManifestFiles#read(ManifestFile, FileIO, Map)} to
* ensure the schema used by filters is the latest table schema. This should be used only when
* reading a manifest without filters.
*
* @param manifest a ManifestFile
* @param io a FileIO
* @return a manifest reader
*/
public static ManifestReader read(ManifestFile manifest, FileIO io) {
return read(manifest, io, null);
}
/**
* Returns a new {@link ManifestReader} for a {@link ManifestFile}.
*
* @param manifest a {@link ManifestFile}
* @param io a {@link FileIO}
* @param specsById a Map from spec ID to partition spec
* @return a {@link ManifestReader}
*/
public static ManifestReader read(
ManifestFile manifest, FileIO io, Map specsById) {
Preconditions.checkArgument(
manifest.content() == ManifestContent.DATA,
"Cannot read a delete manifest with a ManifestReader: %s",
manifest);
InputFile file = io.newInputFile(manifest.path(), manifest.length());
InheritableMetadata inheritableMetadata = InheritableMetadataFactory.fromManifest(manifest);
return new ManifestReader<>(file, specsById, inheritableMetadata, FileType.DATA_FILES);
}
/**
* Create a new {@link ManifestWriter}.
*
* Manifests created by this writer have all entry snapshot IDs set to null. All entries will
* inherit the snapshot ID that will be assigned to the manifest on commit.
*
* @param spec {@link PartitionSpec} used to produce {@link DataFile} partition tuples
* @param outputFile the destination file location
* @return a manifest writer
*/
public static ManifestWriter write(PartitionSpec spec, OutputFile outputFile) {
return write(1, spec, outputFile, null);
}
/**
* Create a new {@link ManifestWriter} for the given format version.
*
* @param formatVersion a target format version
* @param spec a {@link PartitionSpec}
* @param outputFile an {@link OutputFile} where the manifest will be written
* @param snapshotId a snapshot ID for the manifest entries, or null for an inherited ID
* @return a manifest writer
*/
public static ManifestWriter write(
int formatVersion, PartitionSpec spec, OutputFile outputFile, Long snapshotId) {
switch (formatVersion) {
case 1:
return new ManifestWriter.V1Writer(spec, outputFile, snapshotId);
case 2:
return new ManifestWriter.V2Writer(spec, outputFile, snapshotId);
}
throw new UnsupportedOperationException(
"Cannot write manifest for table version: " + formatVersion);
}
/**
* Returns a new {@link ManifestReader} for a {@link ManifestFile}.
*
* @param manifest a {@link ManifestFile}
* @param io a {@link FileIO}
* @param specsById a Map from spec ID to partition spec
* @return a {@link ManifestReader}
*/
public static ManifestReader readDeleteManifest(
ManifestFile manifest, FileIO io, Map specsById) {
Preconditions.checkArgument(
manifest.content() == ManifestContent.DELETES,
"Cannot read a data manifest with a DeleteManifestReader: %s",
manifest);
InputFile file = io.newInputFile(manifest.path(), manifest.length());
InheritableMetadata inheritableMetadata = InheritableMetadataFactory.fromManifest(manifest);
return new ManifestReader<>(file, specsById, inheritableMetadata, FileType.DELETE_FILES);
}
/**
* Create a new {@link ManifestWriter} for the given format version.
*
* @param formatVersion a target format version
* @param spec a {@link PartitionSpec}
* @param outputFile an {@link OutputFile} where the manifest will be written
* @param snapshotId a snapshot ID for the manifest entries, or null for an inherited ID
* @return a manifest writer
*/
public static ManifestWriter writeDeleteManifest(
int formatVersion, PartitionSpec spec, OutputFile outputFile, Long snapshotId) {
switch (formatVersion) {
case 1:
throw new IllegalArgumentException("Cannot write delete files in a v1 table");
case 2:
return new ManifestWriter.V2DeleteWriter(spec, outputFile, snapshotId);
}
throw new UnsupportedOperationException(
"Cannot write manifest for table version: " + formatVersion);
}
/**
* Encode the {@link ManifestFile} to a byte array by using avro encoder.
*
* @param manifestFile a {@link ManifestFile}, which should always be a {@link
* GenericManifestFile}.
* @return the binary data.
* @throws IOException if encounter any IO error when encoding.
*/
public static byte[] encode(ManifestFile manifestFile) throws IOException {
GenericManifestFile genericManifestFile = (GenericManifestFile) manifestFile;
return AvroEncoderUtil.encode(genericManifestFile, MANIFEST_AVRO_SCHEMA);
}
/**
* Decode the binary data into a {@link ManifestFile}.
*
* @param manifestData the binary data.
* @return a {@link ManifestFile}. To be precise, it's a {@link GenericManifestFile} which don't
* expose to public.
* @throws IOException if encounter any IO error when decoding.
*/
public static ManifestFile decode(byte[] manifestData) throws IOException {
return AvroEncoderUtil.decode(manifestData);
}
static ManifestReader open(ManifestFile manifest, FileIO io) {
return open(manifest, io, null);
}
static ManifestReader open(
ManifestFile manifest, FileIO io, Map specsById) {
switch (manifest.content()) {
case DATA:
return ManifestFiles.read(manifest, io, specsById);
case DELETES:
return ManifestFiles.readDeleteManifest(manifest, io, specsById);
}
throw new UnsupportedOperationException(
"Cannot read unknown manifest type: " + manifest.content());
}
static ManifestFile copyAppendManifest(
int formatVersion,
InputFile toCopy,
Map specsById,
OutputFile outputFile,
long snapshotId,
SnapshotSummary.Builder summaryBuilder) {
// use metadata that will add the current snapshot's ID for the rewrite
InheritableMetadata inheritableMetadata = InheritableMetadataFactory.forCopy(snapshotId);
try (ManifestReader reader =
new ManifestReader<>(toCopy, specsById, inheritableMetadata, FileType.DATA_FILES)) {
return copyManifestInternal(
formatVersion,
reader,
outputFile,
snapshotId,
summaryBuilder,
ManifestEntry.Status.ADDED);
} catch (IOException e) {
throw new RuntimeIOException(e, "Failed to close manifest: %s", toCopy.location());
}
}
static ManifestFile copyRewriteManifest(
int formatVersion,
InputFile toCopy,
Map specsById,
OutputFile outputFile,
long snapshotId,
SnapshotSummary.Builder summaryBuilder) {
// for a rewritten manifest all snapshot ids should be set. use empty metadata to throw an
// exception if it is not
InheritableMetadata inheritableMetadata = InheritableMetadataFactory.empty();
try (ManifestReader reader =
new ManifestReader<>(toCopy, specsById, inheritableMetadata, FileType.DATA_FILES)) {
return copyManifestInternal(
formatVersion,
reader,
outputFile,
snapshotId,
summaryBuilder,
ManifestEntry.Status.EXISTING);
} catch (IOException e) {
throw new RuntimeIOException(e, "Failed to close manifest: %s", toCopy.location());
}
}
@SuppressWarnings("Finally")
private static ManifestFile copyManifestInternal(
int formatVersion,
ManifestReader reader,
OutputFile outputFile,
long snapshotId,
SnapshotSummary.Builder summaryBuilder,
ManifestEntry.Status allowedEntryStatus) {
ManifestWriter writer = write(formatVersion, reader.spec(), outputFile, snapshotId);
boolean threw = true;
try {
for (ManifestEntry entry : reader.entries()) {
Preconditions.checkArgument(
allowedEntryStatus == entry.status(),
"Invalid manifest entry status: %s (allowed status: %s)",
entry.status(),
allowedEntryStatus);
switch (entry.status()) {
case ADDED:
summaryBuilder.addedFile(reader.spec(), entry.file());
writer.add(entry);
break;
case EXISTING:
writer.existing(entry);
break;
case DELETED:
summaryBuilder.deletedFile(reader.spec(), entry.file());
writer.delete(entry);
break;
}
}
threw = false;
} finally {
try {
writer.close();
} catch (IOException e) {
if (!threw) {
throw new RuntimeIOException(e, "Failed to close manifest: %s", outputFile);
}
}
}
return writer.toManifestFile();
}
}