Berkeley DB

DBENV→set_tx_recover

						#include <db.h>
						int
						DBENV→set_tx_recover(DB_ENV *dbenv,
						int (*tx_recover)(DB_ENV *dbenv,
						DBT *log_rec, DB_LSN *lsn, db_recops op));
					

Description

Set the application’s function to be called during transaction abort and recovery. This function must return 0 on success and either errno or a value outside of the Berkeley DB error name space on failure. It takes four arguments:

• dbenv A Berkeley DB environment.

• log_rec A log record.

• lsn A log sequence number.

• op One of the following values:

  • DB_TXN_BACKWARD_ROLL The log is being read backward to determine which transactions have been committed and to abort those operations that were not; undo the operation described by the log record.

  • DB_TXN_FORWARD_ROLL The log is being played ...