com.facebook.presto.spark.PrestoSparkLocalMetadataStorage 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 com.facebook.presto.spark;
import java.io.File;
import java.io.IOException;
import java.io.UncheckedIOException;
import java.nio.file.Files;
import java.nio.file.Path;
import java.nio.file.Paths;
import static com.google.common.base.Preconditions.checkArgument;
import static java.nio.file.Files.notExists;
import static java.nio.file.Files.readAllBytes;
public class PrestoSparkLocalMetadataStorage
implements PrestoSparkMetadataStorage
{
@Override
public void write(String outputPath, byte[] data)
{
try {
Path outputFile = Paths.get(outputPath);
checkArgument(notExists(outputFile), "File already exist: %s", outputFile);
Files.write(Paths.get(outputPath), data);
}
catch (IOException e) {
throw new UncheckedIOException(e);
}
}
@Override
public byte[] read(String inputPath)
{
File file = new File(inputPath);
checkArgument(file.exists() && file.isFile(), "file does not exist: %s", file);
checkArgument(file.canRead(), "file is not readable: %s", file);
try {
return readAllBytes(Paths.get(inputPath));
}
catch (IOException e) {
throw new UncheckedIOException(e);
}
}
}