/*
* 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 com.facebook.presto.hive;
import com.facebook.presto.rcfile.AircompressorCodecFactory;
import com.facebook.presto.rcfile.HadoopCodecFactory;
import com.facebook.presto.rcfile.RcFileDataSource;
import com.facebook.presto.rcfile.RcFileEncoding;
import com.facebook.presto.rcfile.RcFileWriter;
import com.facebook.presto.spi.Page;
import com.facebook.presto.spi.PrestoException;
import com.facebook.presto.spi.block.Block;
import com.facebook.presto.spi.block.BlockBuilder;
import com.facebook.presto.spi.block.BlockBuilderStatus;
import com.facebook.presto.spi.block.RunLengthEncodedBlock;
import com.facebook.presto.spi.type.Type;
import com.google.common.collect.ImmutableList;
import io.airlift.slice.OutputStreamSliceOutput;
import io.airlift.slice.SliceOutput;
import java.io.IOException;
import java.io.OutputStream;
import java.util.List;
import java.util.Map;
import java.util.Optional;
import java.util.concurrent.Callable;
import java.util.function.Supplier;
import static com.facebook.presto.hive.HiveErrorCode.HIVE_WRITER_CLOSE_ERROR;
import static com.facebook.presto.hive.HiveErrorCode.HIVE_WRITER_DATA_ERROR;
import static com.facebook.presto.hive.HiveErrorCode.HIVE_WRITE_VALIDATION_FAILED;
import static com.google.common.base.MoreObjects.toStringHelper;
import static java.util.Objects.requireNonNull;
public class RcFileFileWriter
implements HiveFileWriter
{
private final RcFileWriter rcFileWriter;
private final Callable<Void> rollbackAction;
private final int[] fileInputColumnIndexes;
private final List<Block> nullBlocks;
private final Optional<Supplier<RcFileDataSource>> validationInputFactory;
public RcFileFileWriter(
OutputStream outputStream,
Callable<Void> rollbackAction,
RcFileEncoding rcFileEncoding,
List<Type> fileColumnTypes,
Optional<String> codecName,
int[] fileInputColumnIndexes,
Map<String, String> metadata,
Optional<Supplier<RcFileDataSource>> validationInputFactory)
throws IOException
{
rcFileWriter = new RcFileWriter(
outputStream instanceof SliceOutput ? ((SliceOutput) outputStream) : new OutputStreamSliceOutput(outputStream),
fileColumnTypes,
rcFileEncoding,
codecName,
new AircompressorCodecFactory(new HadoopCodecFactory(getClass().getClassLoader())),
metadata,
validationInputFactory.isPresent());
this.rollbackAction = rollbackAction;
this.fileInputColumnIndexes = requireNonNull(fileInputColumnIndexes, "outputColumnInputIndexes is null");
ImmutableList.Builder<Block> nullBlocks = ImmutableList.builder();
for (Type fileColumnType : fileColumnTypes) {
BlockBuilder blockBuilder = fileColumnType.createBlockBuilder(new BlockBuilderStatus(), 1, 0);
blockBuilder.appendNull();
nullBlocks.add(blockBuilder.build());
}
this.nullBlocks = nullBlocks.build();
this.validationInputFactory = validationInputFactory;
}
@Override
public long getSystemMemoryUsage()
{
return rcFileWriter.getRetainedSizeInBytes();
}
@Override
public void appendRows(Page dataPage)
{
Block[] blocks = new Block[fileInputColumnIndexes.length];
for (int i = 0; i < fileInputColumnIndexes.length; i++) {
int inputColumnIndex = fileInputColumnIndexes[i];
if (inputColumnIndex >= 0) {
blocks[i] = dataPage.getBlock(inputColumnIndex);
}
else {
blocks[i] = new RunLengthEncodedBlock(nullBlocks.get(i), dataPage.getPositionCount());
}
}
Page page = new Page(dataPage.getPositionCount(), blocks);
try {
rcFileWriter.write(page);
}
catch (IOException e) {
throw new PrestoException(HIVE_WRITER_DATA_ERROR, e);
}
}
@Override
public void commit()
{
try {
rcFileWriter.close();
}
catch (IOException e) {
try {
rollbackAction.call();
}
catch (Exception e2) {
// ignore
}
throw new PrestoException(HIVE_WRITER_CLOSE_ERROR, "Error committing write to Hive", e);
}
if (validationInputFactory.isPresent()) {
try {
try (RcFileDataSource input = validationInputFactory.get().get()) {
rcFileWriter.validate(input);
}
}
catch (IOException e) {
throw new PrestoException(HIVE_WRITE_VALIDATION_FAILED, e);
}
}
}
@Override
public void rollback()
{
try {
try {
rcFileWriter.close();
}
finally {
rollbackAction.call();
}
}
catch (Exception e) {
throw new PrestoException(HIVE_WRITER_CLOSE_ERROR, "Error rolling back write to Hive", e);
}
}
@Override
public String toString()
{
return toStringHelper(this)
.add("writer", rcFileWriter)
.toString();
}
}