Constructor Detail

• TableLockManager.NullTableLockManager

  public TableLockManager.NullTableLockManager()

Method Detail

• writeLock

  public TableLockManager.TableLock writeLock(TableName tableName,
                                     String purpose)

  Description copied from class: TableLockManager
  Returns a TableLock for locking the table for exclusive access

  Specified by:

  writeLock in class TableLockManager

  Parameters:

  tableName - Table to lock

  purpose - Human readable reason for locking the table

  Returns:

  A new TableLock object for acquiring a write lock

• readLock

  public TableLockManager.TableLock readLock(TableName tableName,
                                    String purpose)

  Description copied from class: TableLockManager
  Returns a TableLock for locking the table for shared access among read-lock holders

  Specified by:

  readLock in class TableLockManager

  Parameters:

  tableName - Table to lock

  purpose - Human readable reason for locking the table

  Returns:

  A new TableLock object for acquiring a read lock

• reapAllExpiredLocks

  public void reapAllExpiredLocks()
                           throws IOException

  Description copied from class: TableLockManager
  Force releases all table locks(read and write) that have been held longer than "hbase.table.lock.expire.ms". Assumption is that the clock skew between zookeeper and this servers is negligible. The behavior of the lock holders still thinking that they have the lock is undefined.

  Specified by:

  reapAllExpiredLocks in class TableLockManager

  Throws:

  IOException - If there is an unrecoverable error

• reapWriteLocks

  public void reapWriteLocks()
                      throws IOException

  Description copied from class: TableLockManager
  Force releases table write locks and lock attempts even if this thread does not own the lock. The behavior of the lock holders still thinking that they have the lock is undefined. This should be used carefully and only when we can ensure that all write-lock holders have died. For example if only the master can hold write locks, then we can reap it's locks when the backup master starts.

  Specified by:

  reapWriteLocks in class TableLockManager

  Throws:

  IOException - If there is an unrecoverable error

• tableDeleted

  public void tableDeleted(TableName tableName)
                    throws IOException

  Description copied from class: TableLockManager
  Called after a table has been deleted, and after the table lock is released. TableLockManager should do cleanup for the table state.

  Specified by:

  tableDeleted in class TableLockManager

  Parameters:

  tableName - name of the table

  Throws:

  IOException - If there is an unrecoverable error releasing the lock

• visitAllLocks

  public void visitAllLocks(InterProcessLock.MetadataHandler handler)
                     throws IOException

  Description copied from class: TableLockManager
  Visits all table locks(read and write), and lock attempts with the given callback MetadataHandler.

  Specified by:

  visitAllLocks in class TableLockManager

  Parameters:

  handler - the metadata handler to call

  Throws:

  IOException - If there is an unrecoverable error