Package org.apache.hadoop.fs.statistics

Interface IOStatisticsSource

All Known Subinterfaces:
BulkDelete, IOStatisticsContext, MultipartUploader, PrefetchingStatistics
All Known Implementing Classes:
AbstractMultipartUploader, BlockCompressorStream, BlockDecompressorStream, BufferedFSInputStream, BufferedIOStatisticsInputStream, BufferedIOStatisticsOutputStream, CompressionInputStream, CompressionOutputStream, CompressorStream, CryptoFSDataInputStream, CryptoFSDataOutputStream, CryptoInputStream, CryptoOutputStream, DecompressorStream, DefaultBulkDeleteOperation, EmptyPrefetchingStatistics, FileSystemMultipartUploader, FSDataInputStream, FSDataOutputStream, IOStatisticsContextImpl, LineReader, PassthroughCodec.PassthroughDecompressorStream, RemoteIterators.WrappingRemoteIterator, SourceWrappedStatistics, SplitCompressionInputStream
@Unstable public interface IOStatisticsSource
A source of IO statistics.

These statistics MUST be instance specific, not thread local.

  • Method Summary

    Modifier and Type
    Method
    Description
    default IOStatistics
    getIOStatistics()
    Return a statistics instance.

  • Method Details

    • getIOStatistics

      default IOStatistics getIOStatistics()
      Return a statistics instance.

      It is not a requirement that the same instance is returned every time. IOStatisticsSource.

      If the object implementing this is Closeable, this method may return null if invoked on a closed object, even if it returns a valid instance when called earlier.

      Returns:
      an IOStatistics instance or null