Method Detail

• preLogRoll

  void preLogRoll(org.apache.hadoop.fs.Path oldPath,
                org.apache.hadoop.fs.Path newPath)
                  throws IOException

  The WAL is going to be rolled. The oldPath can be null if this is the first log file from the regionserver.

  Parameters:

  oldPath - the path to the old wal

  newPath - the path to the new wal

  Throws:

  IOException

• postLogRoll

  void postLogRoll(org.apache.hadoop.fs.Path oldPath,
                 org.apache.hadoop.fs.Path newPath)
                   throws IOException

  The WAL has been rolled. The oldPath can be null if this is the first log file from the regionserver.

  Parameters:

  oldPath - the path to the old wal

  newPath - the path to the new wal

  Throws:

  IOException

• preLogArchive

  void preLogArchive(org.apache.hadoop.fs.Path oldPath,
                   org.apache.hadoop.fs.Path newPath)
                     throws IOException

  The WAL is going to be archived.

  Parameters:

  oldPath - the path to the old wal

  newPath - the path to the new wal

  Throws:

  IOException

• postLogArchive

  void postLogArchive(org.apache.hadoop.fs.Path oldPath,
                    org.apache.hadoop.fs.Path newPath)
                      throws IOException

  The WAL has been archived.

  Parameters:

  oldPath - the path to the old wal

  newPath - the path to the new wal

  Throws:

  IOException

• logRollRequested

  void logRollRequested(boolean tooFewReplicas)

  A request was made that the WAL be rolled.

• logCloseRequested

  void logCloseRequested()

  The WAL is about to close.

• visitLogEntryBeforeWrite

  void visitLogEntryBeforeWrite(HRegionInfo info,
                              WALKey logKey,
                              WALEdit logEdit)

  Called before each write.

  Parameters:

  info -

  logKey -

  logEdit -

• visitLogEntryBeforeWrite

  void visitLogEntryBeforeWrite(HTableDescriptor htd,
                              WALKey logKey,
                              WALEdit logEdit)
                                throws IOException

  Parameters:

  htd -

  logKey -

  logEdit - TODO: Retire this in favor of visitLogEntryBeforeWrite(HRegionInfo, WALKey, WALEdit) It only exists to get scope when replicating. Scope should be in the WALKey and not need us passing in a htd.

  Throws:

  IOException - If failed to parse the WALEdit

• postAppend

  void postAppend(long entryLen,
                long elapsedTimeMillis,
                WALKey logKey,
                WALEdit logEdit)
                  throws IOException

  For notification post append to the writer. Used by metrics system at least. TODO: Combine this with above.

  Parameters:

  entryLen - approx length of cells in this append.

  elapsedTimeMillis - elapsed time in milliseconds.

  logKey - A WAL key

  logEdit - A WAL edit containing list of cells.

  Throws:

  IOException - if any network or I/O occurred

• postSync

  void postSync(long timeInNanos,
              int handlerSyncs)

  For notification post writer sync. Used by metrics system at least.

  Parameters:

  timeInNanos - How long the filesystem sync took in nanoseconds.

  handlerSyncs - How many sync handler calls were released by this call to filesystem sync.