org.apache.hudi.io.storage.HoodieHFileUtils Maven / Gradle / Ivy
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* to you under the Apache License, Version 2.0 (the
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* http://www.apache.org/licenses/LICENSE-2.0
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package org.apache.hudi.io.storage;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.fs.FSDataInputStream;
import org.apache.hadoop.fs.FileSystem;
import org.apache.hadoop.fs.Path;
import org.apache.hadoop.hbase.io.FSDataInputStreamWrapper;
import org.apache.hadoop.hbase.io.hfile.CacheConfig;
import org.apache.hadoop.hbase.io.hfile.HFile;
import org.apache.hadoop.hbase.io.hfile.HFileInfo;
import org.apache.hadoop.hbase.io.hfile.ReaderContext;
import org.apache.hadoop.hbase.io.hfile.ReaderContextBuilder;
import java.io.IOException;
/**
* Util class for HFile reading and writing in Hudi
*/
public class HoodieHFileUtils {
// Based on HBase 2.4.9, the primaryReplicaReader is mainly used for constructing
// block cache key, so if we do not use block cache then it is OK to set it as any
// value. We use true here.
private static final boolean USE_PRIMARY_REPLICA_READER = true;
/**
* Creates HFile reader for a file with default `primaryReplicaReader` as true.
*
* @param fs File system.
* @param path Path to file to read.
* @param cacheConfig Cache configuration.
* @param configuration Configuration
* @return HFile reader
* @throws IOException Upon error.
*/
public static HFile.Reader createHFileReader(
FileSystem fs, Path path, CacheConfig cacheConfig, Configuration configuration) throws IOException {
return HFile.createReader(fs, path, cacheConfig, USE_PRIMARY_REPLICA_READER, configuration);
}
/**
* Creates HFile reader for byte array with default `primaryReplicaReader` as true.
*
* @param fs File system.
* @param dummyPath Dummy path to file to read.
* @param content Content in byte array.
* @return HFile reader
* @throws IOException Upon error.
*/
public static HFile.Reader createHFileReader(
FileSystem fs, Path dummyPath, byte[] content) throws IOException {
// Avoid loading default configs, from the FS, since this configuration is mostly
// used as a stub to initialize HFile reader
Configuration conf = new Configuration(false);
HoodieAvroHFileReader.SeekableByteArrayInputStream bis = new HoodieAvroHFileReader.SeekableByteArrayInputStream(content);
FSDataInputStream fsdis = new FSDataInputStream(bis);
FSDataInputStreamWrapper stream = new FSDataInputStreamWrapper(fsdis);
ReaderContext context = new ReaderContextBuilder()
.withFilePath(dummyPath)
.withInputStreamWrapper(stream)
.withFileSize(content.length)
.withFileSystem(fs)
.withPrimaryReplicaReader(USE_PRIMARY_REPLICA_READER)
.withReaderType(ReaderContext.ReaderType.STREAM)
.build();
HFileInfo fileInfo = new HFileInfo(context, conf);
HFile.Reader reader = HFile.createReader(context, fileInfo, new CacheConfig(conf), conf);
fileInfo.initMetaAndIndex(reader);
return reader;
}
}