Package org.apache.jackrabbit.oak.segment.spi.monitor

Interface IOMonitor

All Known Implementing Classes:
CompositeIOMonitor, DiskCacheIOMonitor, IOMonitorAdapter, IOTraceMonitor, MetricsIOMonitor, RedisCacheIOMonitor
public interface IOMonitor
Callback interface that eases the collection of statistics about I/O operations.

  • Method Summary

    Modifier and Type
    Method
    Description
    void
    afterSegmentRead(File file, long msb, long lsb, int length, long elapsed)
    Called after a segment is read from the file system.
    void
    afterSegmentWrite(File file, long msb, long lsb, int length, long elapsed)
    Called after a segment is written to the file system.
    void
    beforeSegmentRead(File file, long msb, long lsb, int length)
    Called before a segment is read from the file system.
    void
    beforeSegmentWrite(File file, long msb, long lsb, int length)
    Called before a segment is written to the file system.

  • Method Details

    • beforeSegmentRead

      void beforeSegmentRead(File file, long msb, long lsb, int length)
      Called before a segment is read from the file system.
      Parameters:
      file - File containing the segment.
      msb - Most significant bits of the segment ID.
      lsb - Least significant bits of the segment ID.
      length - Size of the segment.

    • afterSegmentRead

      void afterSegmentRead(File file, long msb, long lsb, int length, long elapsed)
      Called after a segment is read from the file system. This is called only in case of successful operations.
      Parameters:
      file - File containing the segment.
      msb - Most significant bits of the segment ID.
      lsb - Least significant bits of the segment ID.
      length - Size of the segment.
      elapsed - Time spent by the read operation, in nanoseconds.

    • beforeSegmentWrite

      void beforeSegmentWrite(File file, long msb, long lsb, int length)
      Called before a segment is written to the file system.
      Parameters:
      file - File containing the segment.
      msb - Most significant bits of the segment ID.
      lsb - Least significant bits of the segment ID.
      length - Size of the segment.

    • afterSegmentWrite

      void afterSegmentWrite(File file, long msb, long lsb, int length, long elapsed)
      Called after a segment is written to the file system. This is called only in case of successful operations.
      Parameters:
      file - File containing the segment.
      msb - Most significant bits of the segment ID.
      lsb - Least significant bits of the segment ID.
      length - Size of the segment.
      elapsed - Time spent by the write operation, in nanoseconds.