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io.trino.rcfile.RcFileWriter Maven / Gradle / Ivy
/*
* Licensed 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 io.trino.rcfile;
import com.google.common.io.Closer;
import io.airlift.slice.DynamicSliceOutput;
import io.airlift.slice.Slice;
import io.airlift.slice.SliceOutput;
import io.airlift.units.DataSize;
import io.trino.rcfile.RcFileCompressor.CompressedSliceOutput;
import io.trino.rcfile.RcFileWriteValidation.RcFileWriteValidationBuilder;
import io.trino.spi.Page;
import io.trino.spi.block.Block;
import io.trino.spi.type.Type;
import org.openjdk.jol.info.ClassLayout;
import javax.annotation.Nullable;
import java.io.Closeable;
import java.io.IOException;
import java.util.List;
import java.util.Map;
import java.util.Map.Entry;
import java.util.Optional;
import java.util.concurrent.ThreadLocalRandom;
import java.util.function.Consumer;
import static com.google.common.base.Preconditions.checkArgument;
import static com.google.common.base.Preconditions.checkState;
import static io.airlift.slice.Slices.utf8Slice;
import static io.airlift.units.DataSize.Unit.KILOBYTE;
import static io.airlift.units.DataSize.Unit.MEGABYTE;
import static io.trino.rcfile.PageSplitterUtil.splitPage;
import static io.trino.rcfile.RcFileDecoderUtils.writeLengthPrefixedString;
import static io.trino.rcfile.RcFileDecoderUtils.writeVInt;
import static io.trino.rcfile.RcFileReader.validateFile;
import static java.lang.StrictMath.toIntExact;
import static java.util.Objects.requireNonNull;
public class RcFileWriter
implements Closeable
{
private static final int INSTANCE_SIZE = ClassLayout.parseClass(RcFileWriter.class).instanceSize();
private static final Slice RCFILE_MAGIC = utf8Slice("RCF");
private static final int CURRENT_VERSION = 1;
private static final String COLUMN_COUNT_METADATA_KEY = "hive.io.rcfile.column.number";
private static final DataSize DEFAULT_TARGET_MIN_ROW_GROUP_SIZE = DataSize.of(4, MEGABYTE);
private static final DataSize DEFAULT_TARGET_MAX_ROW_GROUP_SIZE = DataSize.of(8, MEGABYTE);
private static final DataSize MIN_BUFFER_SIZE = DataSize.of(4, KILOBYTE);
private static final DataSize MAX_BUFFER_SIZE = DataSize.of(1, MEGABYTE);
static final String PRESTO_RCFILE_WRITER_VERSION_METADATA_KEY = "presto.writer.version";
static final String PRESTO_RCFILE_WRITER_VERSION;
static {
String version = RcFileWriter.class.getPackage().getImplementationVersion();
PRESTO_RCFILE_WRITER_VERSION = version == null ? "UNKNOWN" : version;
}
private final SliceOutput output;
private final List types;
private final RcFileEncoding encoding;
private final RcFileCodecFactory codecFactory;
private final long syncFirst = ThreadLocalRandom.current().nextLong();
private final long syncSecond = ThreadLocalRandom.current().nextLong();
private CompressedSliceOutput keySectionOutput;
private final ColumnEncoder[] columnEncoders;
private final int targetMinRowGroupSize;
private final int targetMaxRowGroupSize;
private int bufferedSize;
private int bufferedRows;
private long totalRowCount;
@Nullable
private final RcFileWriteValidationBuilder validationBuilder;
public RcFileWriter(
SliceOutput output,
List types,
RcFileEncoding encoding,
Optional codecName,
RcFileCodecFactory codecFactory,
Map metadata,
boolean validate)
throws IOException
{
this(
output,
types,
encoding,
codecName,
codecFactory,
metadata,
DEFAULT_TARGET_MIN_ROW_GROUP_SIZE,
DEFAULT_TARGET_MAX_ROW_GROUP_SIZE,
validate);
}
public RcFileWriter(
SliceOutput output,
List types,
RcFileEncoding encoding,
Optional codecName,
RcFileCodecFactory codecFactory,
Map metadata,
DataSize targetMinRowGroupSize,
DataSize targetMaxRowGroupSize,
boolean validate)
throws IOException
{
requireNonNull(output, "output is null");
requireNonNull(types, "types is null");
checkArgument(!types.isEmpty(), "types is empty");
requireNonNull(encoding, "encoding is null");
requireNonNull(codecName, "codecName is null");
requireNonNull(codecFactory, "codecFactory is null");
requireNonNull(metadata, "metadata is null");
checkArgument(!metadata.containsKey(PRESTO_RCFILE_WRITER_VERSION_METADATA_KEY), "Cannot set property %s", PRESTO_RCFILE_WRITER_VERSION_METADATA_KEY);
checkArgument(!metadata.containsKey(COLUMN_COUNT_METADATA_KEY), "Cannot set property %s", COLUMN_COUNT_METADATA_KEY);
requireNonNull(targetMinRowGroupSize, "targetMinRowGroupSize is null");
requireNonNull(targetMaxRowGroupSize, "targetMaxRowGroupSize is null");
checkArgument(targetMinRowGroupSize.compareTo(targetMaxRowGroupSize) <= 0, "targetMinRowGroupSize must be less than or equal to targetMaxRowGroupSize");
this.validationBuilder = validate ? new RcFileWriteValidationBuilder(types) : null;
this.output = output;
this.types = types;
this.encoding = encoding;
this.codecFactory = codecFactory;
// write header
output.writeBytes(RCFILE_MAGIC);
output.writeByte(CURRENT_VERSION);
recordValidation(validation -> validation.setVersion((byte) CURRENT_VERSION));
// write codec information
output.writeBoolean(codecName.isPresent());
codecName.ifPresent(name -> writeLengthPrefixedString(output, utf8Slice(name)));
recordValidation(validation -> validation.setCodecClassName(codecName));
// write metadata
output.writeInt(Integer.reverseBytes(metadata.size() + 2));
writeMetadataProperty(COLUMN_COUNT_METADATA_KEY, Integer.toString(types.size()));
writeMetadataProperty(PRESTO_RCFILE_WRITER_VERSION_METADATA_KEY, PRESTO_RCFILE_WRITER_VERSION);
for (Entry entry : metadata.entrySet()) {
writeMetadataProperty(entry.getKey(), entry.getValue());
}
// write sync sequence
output.writeLong(syncFirst);
recordValidation(validation -> validation.setSyncFirst(syncFirst));
output.writeLong(syncSecond);
recordValidation(validation -> validation.setSyncSecond(syncSecond));
// initialize columns
RcFileCompressor compressor = codecName.map(codecFactory::createCompressor).orElse(new NoneCompressor());
keySectionOutput = compressor.createCompressedSliceOutput((int) MIN_BUFFER_SIZE.toBytes(), (int) MAX_BUFFER_SIZE.toBytes());
keySectionOutput.close(); // output is recycled on first use which requires output to be closed
columnEncoders = new ColumnEncoder[types.size()];
for (int columnIndex = 0; columnIndex < types.size(); columnIndex++) {
Type type = types.get(columnIndex);
ColumnEncoding columnEncoding = encoding.getEncoding(type);
columnEncoders[columnIndex] = new ColumnEncoder(columnEncoding, compressor);
}
this.targetMinRowGroupSize = toIntExact(targetMinRowGroupSize.toBytes());
this.targetMaxRowGroupSize = toIntExact(targetMaxRowGroupSize.toBytes());
}
private void writeMetadataProperty(String key, String value)
{
writeLengthPrefixedString(output, utf8Slice(key));
writeLengthPrefixedString(output, utf8Slice(value));
recordValidation(validation -> validation.addMetadataProperty(key, value));
}
@Override
public void close()
throws IOException
{
try (Closer closer = Closer.create()) {
closer.register(output);
closer.register(keySectionOutput::destroy);
for (ColumnEncoder columnEncoder : columnEncoders) {
closer.register(columnEncoder::destroy);
}
writeRowGroup();
}
}
private void recordValidation(Consumer task)
{
if (validationBuilder != null) {
task.accept(validationBuilder);
}
}
public void validate(RcFileDataSource input)
throws RcFileCorruptionException
{
checkState(validationBuilder != null, "validation is not enabled");
validateFile(
validationBuilder.build(),
input,
encoding,
types,
codecFactory);
}
public long getRetainedSizeInBytes()
{
long retainedSize = INSTANCE_SIZE;
retainedSize += output.getRetainedSize();
retainedSize += keySectionOutput.getRetainedSize();
for (ColumnEncoder columnEncoder : columnEncoders) {
retainedSize += columnEncoder.getRetainedSizeInBytes();
}
return retainedSize;
}
public void write(Page page)
throws IOException
{
if (page.getPositionCount() == 0) {
return;
}
List pages = splitPage(page, targetMaxRowGroupSize);
for (Page splitPage : pages) {
bufferPage(splitPage);
}
}
private void bufferPage(Page page)
throws IOException
{
bufferedRows += page.getPositionCount();
bufferedSize = 0;
for (int i = 0; i < page.getChannelCount(); i++) {
Block block = page.getBlock(i);
columnEncoders[i].writeBlock(block);
bufferedSize += columnEncoders[i].getBufferedSize();
}
recordValidation(validation -> validation.addPage(page));
if (bufferedSize >= targetMinRowGroupSize) {
writeRowGroup();
}
}
private void writeRowGroup()
throws IOException
{
if (bufferedRows == 0) {
return;
}
// write sync sequence for every row group except for the first row group
if (totalRowCount != 0) {
output.writeInt(-1);
output.writeLong(syncFirst);
output.writeLong(syncSecond);
}
// flush and compress each column
for (ColumnEncoder columnEncoder : columnEncoders) {
columnEncoder.closeColumn();
}
// build key section
int valueLength = 0;
keySectionOutput = keySectionOutput.createRecycledCompressedSliceOutput();
try {
writeVInt(keySectionOutput, bufferedRows);
recordValidation(validation -> validation.addRowGroup(bufferedRows));
for (ColumnEncoder columnEncoder : columnEncoders) {
valueLength += columnEncoder.getCompressedSize();
writeVInt(keySectionOutput, columnEncoder.getCompressedSize());
writeVInt(keySectionOutput, columnEncoder.getUncompressedSize());
Slice lengthData = columnEncoder.getLengthData();
writeVInt(keySectionOutput, lengthData.length());
keySectionOutput.writeBytes(lengthData);
}
}
finally {
keySectionOutput.close();
}
// write the sum of the uncompressed key length and compressed value length
// this number is useless to the reader
output.writeInt(Integer.reverseBytes(keySectionOutput.size() + valueLength));
// write key section
output.writeInt(Integer.reverseBytes(keySectionOutput.size()));
output.writeInt(Integer.reverseBytes(keySectionOutput.getCompressedSize()));
for (Slice slice : keySectionOutput.getCompressedSlices()) {
output.writeBytes(slice);
}
// write value section
for (ColumnEncoder columnEncoder : columnEncoders) {
List slices = columnEncoder.getCompressedData();
for (Slice slice : slices) {
output.writeBytes(slice);
}
columnEncoder.reset();
}
totalRowCount += bufferedRows;
bufferedSize = 0;
bufferedRows = 0;
}
private static class ColumnEncoder
{
private static final int INSTANCE_SIZE = ClassLayout.parseClass(ColumnEncoder.class).instanceSize() + ClassLayout.parseClass(ColumnEncodeOutput.class).instanceSize();
private final ColumnEncoding columnEncoding;
private ColumnEncodeOutput encodeOutput;
private final SliceOutput lengthOutput = new DynamicSliceOutput(512);
private CompressedSliceOutput output;
private boolean columnClosed;
public ColumnEncoder(ColumnEncoding columnEncoding, RcFileCompressor compressor)
{
this.columnEncoding = columnEncoding;
this.output = compressor.createCompressedSliceOutput((int) MIN_BUFFER_SIZE.toBytes(), (int) MAX_BUFFER_SIZE.toBytes());
this.encodeOutput = new ColumnEncodeOutput(lengthOutput, output);
}
private void writeBlock(Block block)
throws IOException
{
checkArgument(!columnClosed, "Column is closed");
columnEncoding.encodeColumn(block, output, encodeOutput);
}
public void closeColumn()
throws IOException
{
checkArgument(!columnClosed, "Column is not open");
encodeOutput.flush();
output.close();
columnClosed = true;
}
public int getBufferedSize()
{
return lengthOutput.size() + output.size();
}
public Slice getLengthData()
{
checkArgument(columnClosed, "Column is open");
return lengthOutput.slice();
}
public int getUncompressedSize()
{
checkArgument(columnClosed, "Column is open");
return output.size();
}
public int getCompressedSize()
{
checkArgument(columnClosed, "Column is open");
return output.getCompressedSize();
}
public List getCompressedData()
{
checkArgument(columnClosed, "Column is open");
return output.getCompressedSlices();
}
public void reset()
{
checkArgument(columnClosed, "Column is open");
lengthOutput.reset();
output = output.createRecycledCompressedSliceOutput();
encodeOutput = new ColumnEncodeOutput(lengthOutput, output);
columnClosed = false;
}
public void destroy()
throws IOException
{
output.destroy();
}
public long getRetainedSizeInBytes()
{
return INSTANCE_SIZE + lengthOutput.getRetainedSize() + output.getRetainedSize();
}
private static class ColumnEncodeOutput
implements EncodeOutput
{
private final SliceOutput lengthOutput;
private final SliceOutput valueOutput;
private int previousOffset;
private int previousLength;
private int runLength;
public ColumnEncodeOutput(SliceOutput lengthOutput, SliceOutput valueOutput)
{
this.lengthOutput = lengthOutput;
this.valueOutput = valueOutput;
this.previousOffset = valueOutput.size();
this.previousLength = -1;
}
@Override
public void closeEntry()
{
int offset = valueOutput.size();
int length = offset - previousOffset;
previousOffset = offset;
if (length == previousLength) {
runLength++;
}
else {
if (runLength > 0) {
int value = ~runLength;
writeVInt(lengthOutput, value);
}
writeVInt(lengthOutput, length);
previousLength = length;
runLength = 0;
}
}
private void flush()
{
if (runLength > 0) {
int value = ~runLength;
writeVInt(lengthOutput, value);
}
previousLength = -1;
runLength = 0;
}
}
}
}
