head 1.4; access; symbols RPM_4_1:1.1.1.2 RPM_4_0_4:1.1.1.2 RPM_4_0_3:1.1.1.1 RPM:1.1.1; locks; strict; comment @# @; 1.4 date 2003.08.24.12.43.11; author rse; state dead; branches; next 1.3; 1.3 date 2003.08.24.12.33.46; author rse; state Exp; branches; next 1.2; 1.2 date 2003.08.24.12.25.45; author rse; state dead; branches; next 1.1; 1.1 date 2001.07.23.20.45.36; author rse; state Exp; branches 1.1.1.1; next ; 1.1.1.1 date 2001.07.23.20.45.36; author rse; state Exp; branches; next 1.1.1.2; 1.1.1.2 date 2002.01.08.00.30.09; author rse; state Exp; branches; next ; desc @@ 1.4 log @Resolve: RPM 4.1 -> RPM 4.1.1 @ text @ Berkeley DB: DbEnv::set_tx_recover

DbEnv::set_tx_recover

 APIRef 

#include <db_cxx.h>


int
DbEnv::set_tx_recover(int (*)(DbEnv *dbenv,
    Dbt *log_rec, DbLsn *lsn, db_recops op));

Description

Set the application's method to be called during transaction abort and recovery. This method 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 forward; redo the operation described by the log record.

DB_TXN_ABORT
The log is being read backward during a transaction abort; undo the operation described by the log record.

DB_TXN_APPLY
The log is being applied on a replica site; redo the operation described by the log record.

The DB_TXN_FORWARD_ROLL and DB_TXN_APPLY operations frequently imply the same actions, redoing changes that appear in the log record. The macro DB_REDO(op) checks that the operation is one of DB_TXN_FORWARD_ROLL or DB_TXN_APPLY, and should be used in the recovery code to refer to the conditions under which operations should be redone. Similarly, the macro DB_UNDO(op) checks if the operation is one of DB_TXN_BACKWARD_ROLL or DB_TXN_ABORT.

The DbEnv::set_tx_recover interface may be used only to configure Berkeley DB before the DbEnv::open interface is called.

The DbEnv::set_tx_recover method either returns a non-zero error value or throws an exception that encapsulates a non-zero error value on failure, and returns 0 on success.

Errors

The DbEnv::set_tx_recover method may fail and throw an exception or return a non-zero error for the following conditions:

EINVAL
An invalid flag value or parameter was specified.

Called after DbEnv::open was called.

The DbEnv::set_tx_recover method may fail and throw an exception or return a non-zero error for errors specified for other Berkeley DB and C library or system methods. If a catastrophic error has occurred, the DbEnv::set_tx_recover method may fail and either return DB_RUNRECOVERY or throw an exception encapsulating DB_RUNRECOVERY, in which case all subsequent Berkeley DB calls will fail in the same way.

Class

DbEnv, DbTxn

See Also

DbEnv::set_tx_max, DbEnv::set_tx_recover, DbEnv::set_tx_timestamp, DbTxn::abort, DbEnv::txn_begin, DbEnv::txn_checkpoint, DbTxn::commit, DbTxn::discard, DbTxn::id, DbTxn::prepare, DbEnv::txn_recover, DbTxn::set_timeout and DbEnv::txn_stat.

APIRef

Copyright Sleepycat Software @ 1.3 log @Resolve: RPM 4.0.5 -> RPM 4.1 @ text @@ 1.2 log @Resolve: RPM 4.0.4 -> RPM 4.0.5 @ text @d1 1 a1 1 d17 1 a17 1 APIRef d46 2 d50 7 d86 1 d91 1 a91 1 APIRef @ 1.1 log @Initial revision @ text @d1 1 a1 1 @ 1.1.1.1 log @Import: RPM 4.0.3 @ text @@ 1.1.1.2 log @Import: RPM 4.0.4 @ text @d1 1 a1 1 d17 1 a17 1 APIRef a45 2

DB_TXN_APPLY
The log is being applied on a replica site; redo the operation described by the log record. a47 7

The DB_TXN_FORWARD_ROLL and DB_TXN_APPLY operations frequently imply the same actions, redoing changes that appear in the log record. The macro DB_REDO(op) checks that the operation is one of DB_TXN_FORWARD_ROLL or DB_TXN_APPLY, and should be used in the recovery code to refer to the conditions under which operations should be redone. Similarly, the macro DB_UNDO(op) checks if the operation is one of DB_TXN_BACKWARD_ROLL or DB_TXN_ABORT. a76 1 DbTxn::set_timeout d81 1 a81 1 APIRef @